ALBERT — All Library Books, journals and Electronic Records Telegrafenberg

1

Digitale Medien

Phylogenetic position of Dictyostelium inferred from multiple protein data sets (1995)

Kuma, Kei-ichi ; Nikoh, Naruo ; Iwabe, Naoyuki ; [weitere]

Springer

Journal of molecular evolution 41 (1995), S. 238-246

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-1432

Schlagwort(e): Cellular slime molds ; Animals ; Fungi ; Plantae ; Maximum-likelihood method ; Evolution

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract The phylogenetic position of Dictyostelium inferred from 18S rRNA data contradicts that from protein data. Protein trees always show the close affinity of Dictyostelium with animals, fungi, and plants, whereas in 18S rRNA trees the branching of Dictyostelium is placed at a position before the massive radiation of protist groups including the divergence of the three kingdoms. To settle this controversial issue and to determine the correct position of Dictyostelium, we inferred the phylogenetic relationship among Dictyostelium and the three kingdoms Animalia, Fungi, and Plantae by a maximum-likelihood method using 19 different protein data sets. It was shown at the significance level of 1 SE that the branching of Dictyostelium antedates the divergence of Animalia and Fungi, and Plantae is an outgroup of the Animalia-Fungi-Dictyostelium clade.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00170678

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

2

Digitale Medien

Evolutionary relationships of eukaryotic kingdoms (1996)

Kumar, Sudhir ; Rzhetsky, Andrey

Springer

Journal of molecular evolution 42 (1996), S. 183-193

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-1432

Schlagwort(e): Small-subunit ribosomal RNA ; Phylogeny ; Animals ; Fungi ; Plants ; Alveolates ; Heterokonts ; Stramenopiles

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Abstract The evolutionary relationships of four eukaryotic kingdoms—Animalia, Plantae, Fungi, and Protista—remain unclear. In particular, statistical support for the closeness of animals to fungi rather than to plants is lacking, and a preferred branching order of these and other eukaryotic lineages is still controversial even though molecular sequences from diverse eukaryotic taxa have been analyzed. We report a statistical analysis of 214 sequences of nuclear small-subunit ribosomal RNA (srRNA) gene undertaken to clarify these evolutionary relationships. We have considered the variability of substitution rates and the nonindependence of nucleotide substitution across sites in the srRNA gene in testing alternative hypotheses regarding the branching patterns of eukaryote phylogeny. We find that the rates of evolution among sites in the srRNA sequences vary substantially and are approximately gamma distributed with size and shape parameter equal to 0.76. Our results suggest that (1) the animals and true fungi are indeed closer to each other than to any other “crown” group in the eukaryote tree, (2) red algae are the closest relatives of animals, true fungi, and green plants, and (3) the heterokonts and alveolates probably evolved prior to the divergence of red algae and animal-fungus-green-plant lineages. Furthermore, our analyses indicate that the branching order of the eukaryotic lineages that diverged prior to the evolution of alveolates may be generally difficult to resolve with the srRNA sequence data.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02198844

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

3

Digitale Medien

Segmentation and tracking of piglets in images (1995)

McFarlane, N. J. B. ; Schofield, C. P.

Springer

Machine vision and applications 8 (1995), S. 187-193

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-1769

Schlagwort(e): Tracking ; Segmentation ; Pigs ; Animals ; Computer vision

Quelle: Springer Online Journal Archives 1860-2000

Thema: Informatik

Notizen: Abstract An algorithm was developed for the segmentation and tracking of piglets and tested on a 200-image sequence of 10 piglets moving on a straw background. The image-capture rate was 1 image/140 ms. The segmentation method was a combination of image differencing with respect to a median background and a Laplacian operator. The features tracked were blob edges in the segmented image. During tracking, the piglets were modelled as ellipses initialised on the blobs. Each piglet was tracked by searching for blob edges in an elliptical window about the piglet's position, which was predicted from its previous two positions.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01215814

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

4

Digitale Medien

The ultrastructure, catecholamine, and prolactin contents of the rostral pars distalis of the fish Mugil platanus after reserpine or 6-hydroxydopamine administration (1975)

Zambrano, David

Springer

Cell & tissue research 162 (1975), S. 551-563

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1432-0878

Schlagwort(e): Hypophysis ; Rostral pars distalis ; Mugil platanus ; Animals ; Prolactin hormone secretion

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie , Medizin

Notizen: Summary The rostral pars distalis (RPD) of the teleost Mugil platanus from animals pretreated with reserpine or 6-hydroxydopamine (6-HODA) were assayed for dopamine (DA) or noradrenaline (NA) or for prolactin hormone. Such determinations were coupled with electron microscopy. It was found that reserpine and 6-HODA produced a significant decrease in the content of DA, NA, and prolactin. Electron microscope studies revealed that prolactin cells became activated as judged by ultrastructural criteria. After 6-HODA treatment type “B” neurosecretory fibers entering the RPD became selectively destroyed. These observations lead us to suggest that prolactin secretion is under inhibitory control by type “B” neurosecretory fibers of adrenergic nature.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00209354

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

5

Digitale Medien

Animal Consciousness and Ethics in Asia and the Pacific (1997)

Macer, Darryl

Springer

Journal of agricultural and environmental ethics 10 (1997), S. 249-267

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 1573-322X

Schlagwort(e): Animals ; Asia ; consciousness ; Australia ; Hong Kong ; India ; Israel ; Japan ; New Zealand ; The Philippines ; Russia ; Singapore ; Thailand

Quelle: Springer Online Journal Archives 1860-2000

Thema: Energietechnik , Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Philosophie

Notizen: Abstract The interactions between humans, animals and the environment have shaped human values and ethics, not only the genes that we are made of. The animal rights movement challenges human beings to reconsider interactions between humans and other animals, and maybe connected to the environmental movement that begs us to recognize the fact that there are symbiotic relationships between humans and all other organisms. The first part of this paper looks at types of bioethics, the implications of autonomy and the value of being alive. Then the level of consciousness of these relationships are explored in survey results from Asia and the Pacific, especially in the 1993 International Bioethics Survey conducted in Australia, Hong Kong, India, Israel, Japan, New Zealand, The Philippines, Russia, Singapore and Thailand. Very few mentioned animal consciousness in the survey, but there were more biocentric comments in Australia and Japan; and more comments with the idea of harmony including humans in Thailand. Comparisons between questions and surveys will also be made, in an attempt to describe what people imagine animal consciousness to be, and whether this relates to human ethics of the relationships.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1023/A:1007774409131

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

6

Digitale Medien

Compatibility of poly(ethylene 2,6-naphthalate) and poly(butylene 2,6-naphthalate) blends (1995)

Yoon, Kwan Han ; Lee, Sang Cheol ; Park, O Ok

Stamford, Conn. [u.a.] : Wiley-Blackwell

Polymer Engineering and Science 35 (1995), S. 1807-1810

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0032-3888

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: Blends prepared from poly(ethylene 2,6-naphthalate) (PEN) and poly(butylene 2,6-naphthalate) (PBN) show only partial miscibility judged from their glass transition temperatures. Two distinct mechanical behaviors are observed: brittle for the blends 〈 20 wt% of PBN, while ductile 〉 20 wt% of PBN. The experimental modulus and strength values of the blends are within the predicted values according to Kleiner and Paul models, respectively. This means that PEN/PBN blends are somewhat compatible based on their tensile properties. Especially for 20 wt% of PBN blend, the high modulus and strength are observed. The viscosity of the blend is high, which may imply a somewhat entangled morphology in the amorphous state.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pen.760352210

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

7

Digitale Medien

Masthead (1995)

Stamford, Conn. [u.a.] : Wiley-Blackwell

Polymer Engineering and Science 35 (1995)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0032-3888

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pen.760352301

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

8

Digitale Medien

Effects of mixing porcedures on properties of compatibilized polypropylene/nylon 6 blends (1995)

Lee, Jae-Dong ; Yang, Seung-Man

Stamford, Conn. [u.a.] : Wiley-Blackwell

Polymer Engineering and Science 35 (1995), S. 1821-1833

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0032-3888

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: The paper consides the effects of compatibilization with maleic anhydride grafted polypropylene (PP-g-MAH) on the propertie of immiscible blends of polypropylene (PP) and nylon 6 (N6). We prepared the blends by three different mixing processes; single-step blending, two-step blending with reactive premixing, and two-step blending with nonreactive premixing, to determine the effective mixiing process for fine morphological structure thermal stability, and mechanical properties. Dynamic melt reheological properties were measured to examine the modification of elastic properties by the compatibilizer. In addtion, thermal analysis was also carried out to detect the change in crystallization and thereby to probe the degree of compatibilizaton. The results show that compatibilized blends prepared by teh single-step process exhibit improved phase morphology, thermal stability, and mechanical properties for dried conditions, compared with other blend types. Finally, the water absorption test indicates that the added compatibilizer yields enhanced water resistance in spite of the strong intrinsic hydrophilicity of N6. In particular, two-step blending with reactive premixing is most effective in improving water resistance and reducing degradation of mechanical properties after moisture absorption.

Zusätzliches Material: 14 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pen.760352302

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

9

Digitale Medien

A hybrid numerical technique to model 3-D flow fields in resin transfer molding processes (1995)

Friedrichs, B. ; Güçleri, S. I.

Stamford, Conn. [u.a.] : Wiley-Blackwell

Polymer Engineering and Science 35 (1995), S. 1834-1851

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0032-3888

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: A hybrid two-/three-dimensional solution technique is presentedto model 3-D flow fields in resin transfer moeling using Darcy's low. The 3-D flow field is only solved for regions where all three velocity components are significant, thus largely reducing the number of unknowns. Elsewhere, the commonly used 2-D approximation for flow in thin gaps between plates is employe.d The method is applied to regions where the flow splits, such as T-joints. Because of the uncertainties associated with an accurate determination of the permeability in these regions, a simplified decompled procedure is procesed, which reduces the computational complexity. In this procedure, the flow front is advanced using the 2-D formulation. The 2-D formulation also provides the boundary conditions for the subsequent computation of the 3-D flow field without feedback of flow field information to the 2-d model. The governing equations are solved using boundary fitted coordinate systems (BFCS) together with the finite difference method (FDM). Numerical as well as algebraic grid generation and domain decomposition are employe dto generate grids that always concide with the continuously deforming and enlarging flow domain. Results that include the trackingof numerical tracer particles to visualize the three-dimensionality of the flow field are presented for isothermal flow of a Newtonian fluid through a T-joint. This detailed flow field description is expected to form the basis for a rather accurate simulation of quantitities that largely depend on the fluid particle pathlines, such as the degree of cure. The method is also extendable to shear-thinning fluids as well as to 3-D flow in the vicinity of the flow front.

Zusätzliches Material: 22 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pen.760352303

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

10

Digitale Medien

Theory of competition between breakup and coalescence of droplets in flowing polymer blends (1995)

Fortelný, Ivan ; Živný, Antonín

Stamford, Conn. [u.a.] : Wiley-Blackwell

Polymer Engineering and Science 35 (1995), S. 1872-1877

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0032-3888

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: The Smoluchowski equation for the breakup and coalescence of dispersed droplets has been solved for flowing polymer blends. A scaling form for the distribution of droplet sized derived and published for a system of clusters with fragmentation and coagualation was used in our dervation. Equations are developed here for the average droplet size and for the characteristic time of transition to steady state flow of blends with a high content of the dispersed phase. Expressions reasonably describing the average size of droplets for all concentrations were obtained by a theory modification. Measured dependences of droplet size on the blend composition can be matched only if simultaneous collisions of three and more droplets are considered. The results of the theory indicate that the mechanism of droplet breakup (formation of pieces with the same or different volumes) has only a small effect on their average size in concentrated systems. The dependence of droplet size on the shear rate in flow is determined by properties of the blend components, and is generally nonmonotonic.

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pen.760352306

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

11

Digitale Medien

Performance of reprocessed multilayer LDPE/nylon-6 film (1995)

Nir, M. M. ; Ram, A. ; Miltz, J.

Stamford, Conn. [u.a.] : Wiley-Blackwell

Polymer Engineering and Science 35 (1995), S. 1878-1883

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0032-3888

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: Multilayer LDPE/nylon-6 films with an overall content of 71 wt% LDPE, 24 wt% nylon-6, and 5 wt% PE-based tie-layer adhesive were reprocessed under both minimal and extensive mixing conditions. Thermal and mechanical properties, oxygen and water vapor permeability, and morphology of the reprocessed samples were determined. The modulus and yield stress of the reprocessed films fell between those of the pure homopolymers, whereas percent elongation at break and energy-to-break for all reprocessed films were less than those of the homopolymers. In minimally reprocessed film, layering of LDPE (low-density polyethylene) and nylon-6 was retained, whereas in extensively mixed samples, nylon-6 domains were spherical and ranged from 0.2 to 7 μm. Minimally reprocessed film exhibited good O2 and H2O vapor barrier properties, whereas extensively-mixed samples had poor barrier properties. Properties of well-mixed blends prepared both with and without adhesive showed that 5 wt% adhesive did not compatibilize the LDPE and nylon-6 components.

Zusätzliches Material: 8 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pen.760352307

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

12

Digitale Medien

Assessment of residual stresses during cure and cooling of epoxy resins (1995)

Wang, Hong-Bing ; Yang, Yu-Geng ; Yu, Hui-Hong ; [weitere]

Stamford, Conn. [u.a.] : Wiley-Blackwell

Polymer Engineering and Science 35 (1995), S. 1895-1898

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0032-3888

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: A new stress monitoring technique, a stress-tracking device, is described here. It has been used to study some important properties of epoxy resin. Residual stresses, including a curing shrinkage stress and a cooling shrinkage stress, were measured automatically and continuously during curing and cooling. Simultaneously, information such as an apparent gelation time and glass transition temperature were obtained directly during the experiment. These epoxy resin properties were related to the extent of cure. Varying cure temperature produced changes of cure behavior, which resulted in different residual stresses.

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pen.760352309

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

13

Digitale Medien

Study of reaction injection molding of polyurethane microcellular foam (1995)

Park, Hyeog ; Youn, Jae R.

Stamford, Conn. [u.a.] : Wiley-Blackwell

Polymer Engineering and Science 35 (1995), S. 1899-1906

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0032-3888

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: Processing of microcellular foam was investigated for the feasibility of production of tough and lightweight polyurethanes. To increase the nucleation rate in a gas-supersaturated resin, ultrasonic excitation was applied to the mixture of polyol(polyether-based polyol) and isocyanate(diphenyl methane diisocyanate). A microcellular structure was produced by two sequential steps, i.e., supersaturationof the polyol resin with nitrogen gas at elevated pressure and ultrasonic bubble nucleation right after the impingement mixing of two components of the polyurethane system. Theoretical analyses based on nucleation theories were employed to predict the rate of nucleation in the gas-supersaturated polyurethane. The rate of nucleatio in the resin was predicted by classical nucleation and cluster theories. In the experimental investigation, ultrasonic excitation was applied to increase the nucleation rate in the resin that had been saturated by nitrogen at a saturation pressure 〈 2.0 MPa.

Zusätzliches Material: 11 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pen.760352310

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

14

Digitale Medien

Modeling the mechanical properties in polypropylene/polyamide-6 blends with core shell morphology (1995)

Rösch, Jocachim

Stamford, Conn. [u.a.] : Wiley-Blackwell

Polymer Engineering and Science 35 (1995), S. 1917-1922

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0032-3888

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: Polypropylene/Polyamide-6 (PP.PA) blends containing maleic anhydride grafted elastomers were prepared by reactive blending. Three different types of core shell morphologies were obtained and characterized by transmission electron microscopy (TEM). The midulus of these elastomer midified PP/PA (70/30) blends with core shell type morphology is compared to predictions derived from the Kerner model. The multiphase morphology of these blends could be modeled by sequential application of the Kerner equation to two-phase subinclusions. Using morphological data ontained by TEM, good agreement between experimental and calculated values was ontained. The results are used to tailor PP/Pa-6 blends combining stiffness and toughness.

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pen.760352402

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

15

Digitale Medien

Creep analysis of thermiplastics using stress relaxation data (1995)

Grzywinski, G. G. ; Woodford, D. A.

Stamford, Conn. [u.a.] : Wiley-Blackwell

Polymer Engineering and Science 35 (1995), S. 1931-1937

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0032-3888

Schlagwort(e): Chemistry ; Chemical Engineering

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Chemie und Pharmazie , Maschinenbau , Physik

Notizen: One of the major factors limiting the use of thermoplastics in engineeing applications is the inadequacy of existing design data. Much of the data do not span appropriate ranges of stress, strain, time, or temperature. This study addresses the need to develop an accelerated method for generating long-time design data to support the innovative use of engineering thermoplastics. In particular, stress relaxation tests (SRT) were performed on polycarbonate (PC) and midified poly(phenylene oxide)(PPO), and used to generate time-dependent design data through the short-time measurement of the material's current state without dependence on elastic modulus. The test results and analyses reported here indicate the SRT method to be an efficeint means of generating accurate and repeatable creep and secant modulus data which may be directly used in design. Therefore, SRT shows great potential both as a design parameter development tool, and as a quality control instrumetn for assessing batch-to-batch variability.

Zusätzliches Material: 9 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/pen.760352404

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

16

Digitale Medien

Masthead (1925)

New York, NY : Wiley-Blackwell

Journal of Morphology 40 (1925)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050400301

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

17

Digitale Medien

The formation of the sex glands and germ cells of mammals I. The origin of the germ cells in the albino rat (1925)

Hargitt, Geo. T.

New York, NY : Wiley-Blackwell

Journal of Morphology 40 (1925), S. 517-557

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: An early segregation of germ cells and migration through a germ track into the gonad does not occur in the albino rat. The germ cells are produced only from the peritoneum of the genital region and their earliest formation is coincident with the thickening of the coelomic epithelium to form the genital ridge. This takes place eleven days after insemination in embryos of approximately 18 somites. Germ cells continue to form from the peritoneum during the early development of the gonad. The peritoneum of this region also produces mesenchyme, smaller cells of the gonads, and the germinal epithelium.The argument for the specific character of the germ cells in vertebrates and their continuity from the egg is based largely upon assumption, and not upon substantial observations, and must be discarded. Germ-cell origin is a problem of cellular differentiatio, and not of early segregation.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050400305

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

18

Digitale Medien

Errata (1925)

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1925), S. ii

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410102

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

19

Digitale Medien

The growth and chemical composition of three species of turtles fed on rations of pure foods (1925)

Pearse, A. S. ; Lepkovsky, S. ; Hintze, Laura

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1925), S. 191-216

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Painted turtles, gopher tortoises, and terrapins were fed on various mixtures of sand, salts, dextrin, casein, cod-liver oil, wheat, eggs, lettuce, and meal worms. Each individual was weighted weekly for about a year and then killed for analysis, the water, ash, nitrogen, and fat being determined. Some individuals increased in weight as much as 75 per cent, others lost weight. Judged by growth and chemical analyses, the food requirements of chelonians, as representative poikilothermal vertebrates toward nutritive substances (including vitamines) are similar to those of homoiothermal animals.

Zusätzliches Material: 13 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410109

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

20

Digitale Medien

Natural partial fertilization in fasciolaria (1925)

Hyman, O. W.

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1925), S. 267-281

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Of the eggs laid by Fasciolaria about 1 per cent develop into veligers, about 2 per cent more undergo a few cleavage divisions, and about 97 per cent do not divide at all. The 99 per cent that fail to develop normally are ‘swallowed’ by the veligers. This study concerns itself chiefly with the ova that do not divide. Notes on normal development and on the ova that undergo atypical cleavage are included.All of the ova are found to be typical when passed from the ovary. To each ovum one to several sperms become attached at the vegetal pole in the region of a mass of undifferentiated protoplasm - the ‘polar mass.’ A fertilization cone forms in each ovum and a fertilization membrane. In typical development a yolk lobe is formed, the sperm enters in the usual way, and fertilization is completed as in many other mollusks. In 97 per cent of the ova the yolk lobe is not formed and the sperm does not enter. In these cases the wall of the egg nucleus remains intact a long time. The nucleus itself and the ‘polar mass’ sink into the egg and meet at the center. Then the nuclear wall disappears and an atypical diaster is formed. However, cleavage is not begun and the chromosomes form vesicles that remain near the center of the ovum until it is ‘swallowed’ and digested by the veliger.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410112

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

21

Digitale Medien

The histology of the blood of perophora viridis (ascidian)The observations here recorded were made at the United States Biological Station, Beaufort, North Carolina. I wish to express my gratitude to Hon. Henry O'Malley, Commissioner of Fisheries, for the privilege of using the laboratory, and to Mr. Charles Hatsell, acting director of the station, for the many courtesies extended to me during the course of the work. (1926)

George, W. C.

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1926), S. 311-331

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The blood of Perophora viridis is found to contain six types of cells: (1) Green cells, which have green-colored fatty bodies embedded in clear cytoplasm. (2) Orange cells, with orange-colored bodies of unknown composition in the cytoplasm. (3) Colorless berry-like cells, with fluid-filled vesicles in the cytoplasm. (4) Granular amoeboid cells. (5) Compartmental amoeboid cells, which have box-like vacuoles containing brownian granules of a fatty substance. (6) Vesicular, signet-ring type of cell having a single large vacuole. The cytological structure of these cells and their reaction to various dyes are described.An effort has been made to homologize the types of cells found in the blood of other ascidians with those found in Perophora.It is concluded that the variety of colors found in the cells of ascidian blood is due to the varying chemical states of the vanadium-containing chromogen present in the cells.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410203

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

22

Digitale Medien

Masthead (1926)

New York, NY : Wiley-Blackwell

Journal of Morphology 42 (1926)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050420101

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

23

Digitale Medien

The metabolic gradients of vertebrate embryos. II. The brook lamprey (1926)

Hyman, L. H.

New York, NY : Wiley-Blackwell

Journal of Morphology 42 (1926), S. 111-141

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Disintegration in killing agents was studied throughout development. In the unfertilized egg and cleavage stages the death gradient runs from animal to vegetal pole. In the late blastula stage the future dorsal surface and future point of gastrulation show heightened susceptibility. The gastrula has a gradient from anterior to posterior end along its dorsal surface, with a slight reverse gradient around the blastopore; lateral and ventral regions are least susceptible.Before and after the appearance of the neural groove, the dorsal surface shows increased susceptibility with gradient in it from anterior to posterior end. The neural tube is highly susceptible, with a death gradient from anterior to posterior end and a slight reverse gradient at its posterior end.During late stages and in the larva the double gradient is present; death begins at the two ends and progresses backward from head, forward from anus; from the former most rapidly. The least susceptible place is near the posterior end. The posterior reverse gradient is less developed in the lamprey than in other vertebrate embryos, due, probably, to its lack of a tail bud.Assuming that death differences indicate differences in rate of activity, it appears that such differences in activity may be causes and not results of developmental processes, for the development of certain parts (dorsal surface, blastopore, central nervous system) is indicated by heightened activity before it is evident morphologically.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050420105

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

24

Digitale Medien

Branchiomerism and the theory of head segmentation (1926)

Kingsbury, B. F.

New York, NY : Wiley-Blackwell

Journal of Morphology 42 (1926), S. 83-109

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The summary of this paper is as follows:1A critical review of the developmental evidence shows that the branchial pouches are formed in cephalocaudal sequence subsequently to the segmentation of the dorsal mesoderm.2The pouches interrupt a continuous sheet of mesoderm to form the branchial arches.3The arches when formed do not correspond topographically to the dorsal somites.4Branchiomerism does not therefore coincide with somitic metamerism.3The branchial structures do not support the theory of head segmentation.3The nervi trigeminus, facialis, glossopharyngeus, and vagus cannot be regarded as segmental nerves.3There is no evidence that branchial pouches or arches have been elided from the series.3The problem of meristic homology is briefly discussed.

Zusätzliches Material: 2 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050420104

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

25

Digitale Medien

Freezing and survival of insects at low temperatures (1927)

Payne, Nellie M.

New York, NY : Wiley-Blackwell

Journal of Morphology 43 (1927), S. 521-546

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The literature on the general subject of freezing and survival both in plants and in animals is briefly reviewed and a bibliography given. Insects representing three ecological groups, (1) the oak borers - exposed to temperature extremes normally; (2) stored-products insects representing supposedly a tropical or subtropical group, and, (3) aquatic insects never exposed to temperatures lower than 0°C., were chosen for this study. Determinations of the freezing and undercooling points were made during the yearly cycle.Both the stored-products insects and the aquatic insects studied showed no periodicity in freezing or undercooling. The oak borers showed marked periodicity. The freezing-point varies directly with the moisture content. Cold-hardiness was produced experimentally by, (1) exposure of insects to low temperatures and, (2) by dehydration. Loss of cold-hardiness was produced experimentally by combinations of high temperature, food, and high relative humidity. The freezing-point ordinarily found corresponds with that of the blood. Repeated freezings of the same insect or tissue showed no hysteresis. There exists in certain insects a secondary freezing-point below that ordinarily found. Oak borers in summer condition die at the first freezing-point; in fully hardened condition they die at the secondary freezingpoint.

Zusätzliches Material: 8 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050430209

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

26

Digitale Medien

Ant-mounds as to temperature and sunshine (1927)

Andrews, E. A.

New York, NY : Wiley-Blackwell

Journal of Morphology 44 (1927), S. 1-20

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The ant Formica exsectoides F. builds mounds with some reference to sunlight, and measurements of internal temperatures have shown them higher in upper parts of the mound, but different in different faces of the mound - all higher than the earth outside the mound.Inside temperatures are not constant; they are due to the sunshine. The mound is so fabricated that the internal temperatures are conserved during the night. The ants make use of the differential internal temperatures for rearing broods.Some mounds show bilateral symmetry dependent upon sun exposure.Measurements of rate of running of these ants show a falling off with lower temperatures, and possibly this is one factor in the smaller development of northerly aspects of these mounds.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050440102

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

27

Digitale Medien

Parental chromosome dimensions in Ascaris. A study of the effect of cellular environment on chromosome size (1927)

Hance, Robert T.

New York, NY : Wiley-Blackwell

Journal of Morphology 44 (1927), S. 117-125

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: In the early cleavage stages of Ascaris the homologous chromosomes are of unequal length. Measurements show that these homologues fall into two sharply defined groups suggesting their biparental origin. The shorter are considered to have come from the male.As the age of the embryo increases, these differences between the chromosome mates tend to become less, and it is suggested that at some later period in the history of the animal this difference will entirely disappear in response to the effect of continued existence in a common environment. The length of the chromosomes is very slightly shortened during the early cleavage divisions, while the area of the equatorial cross-section of the cells becomes enormously reduced.

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050440106

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

28

Digitale Medien

Oxygen consumption of individual pupae during metamorphosis (1927)

Taylor, Ivon R.

New York, NY : Wiley-Blackwell

Journal of Morphology 44 (1927), S. 313-339

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The rates of oxygen consumption of single pupae of blowflies (Phormia terraenovae, Phormia regina, Lucilia sericata), of the flesh fly (Sarcophaga sarracenioides Aldrich), of the Mediterranean flour moth (Ephestia kuehniella), and of the bee moth (Galleria mellonella) during metamorphosis, until emergence, have been determined. The record for each pupa, with the exception of those of blowflies, is practically continuous day and night during the period of pupal development which lasted from 140 to 300 hours, according to the species, at the temperatures used. During pupal development there is first a period of decrease in rate, which is later followed by a steady increase until a short time before emergence, when a sudden decrease occurs.The ‘oxygen curves’ of the blowfly pupae (Diptera) are quite different from those of the flour-moth and bee-moth pupae (Lepidoptera), although all are of the same general U-shaped type. There are strong indications of a specific difference in the curves of the blow-fly pupae. The flour-moth pupae curves differ slightly from those of the bee-moth pupae. During the major part of development the rates of O2 consumption of pupae of both sexes of bee moth and flour moth are about the same, but near the end of metamorphosis the females have higher rates than the males. No such sex difference appears among the dipterous pupae used.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050440205

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

29

Digitale Medien

The formation of contractile vacuoles in Amoeba proteus (1927)

Day, Howard Calvin

New York, NY : Wiley-Blackwell

Journal of Morphology 44 (1927), S. 363-372

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The history of investigations on the contractile vacuole is reviewed briefly and brought up to date.The study of the contractile vacuole in Amoeba proteus is considered from standpoints of origin, structure, behavior, and function. The results are obtained from a prolonged study of normal organisms and from their reactions when introduced into conductivity water.The origin of vacuoles is studied by means of dark-field illumination which reveals the vacuole to be formed from a fusion and coalescence of extremely minute droplets.The retaining ‘wall’ of the contractile vacuole is not a permanent structure, but is in the nature of a condensation membrane, totally disappearing with each contraction.The loci of the contractile vacuoles are not permanent, but vacuoles are formed more or less at random. It is unlikely that they are supported in gelated areas, for amoebae with a dozen vacuoles are quite active and there is no interference with amoeboid movement.Conductivity water increases the size, number, and rate of contraction of contractile vacuoles, which suggests that they may function in maintaining an osmotic gradient as well as in the elimination of metabolic waste.

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050440207

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

30

Digitale Medien

Developmental modification and elimination of the larval stage in the ascidian, Corella willmeriana (1927)

Child, C. M.

New York, NY : Wiley-Blackwell

Journal of Morphology 44 (1927), S. 467-514

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The eggs of Corella develop in the atrial chamber of the parent at a pH below that of normal sea-water (pH 7.4 ±). When removed to normal sea-water in early stages and under certain other experimental conditions, larval development is more or less inhibited, the tail being most inhibited, the dorsal region somewhat less. The free larval stage may be eliminated and later development and metamorphosis may proceed normally to an advanced stage in the chorion and give rise to normal ascidians. The region most inhibited are, in general, those which possess the highest reducing power, as indicated by KMnO4. Experiments made in the attempt to control development all agree in indicating that the early stages are adjusted to a certain CO2 concentration approximately that of the atrial chamber and presumably near that of the body. Solutions of the same pH may or may not inhibit development according to their CO2 content.The tail, the region of highest reducing power in the embryo during its development, is most inhibited; the dorsal region, the next most rapidly reducing region, is next in degree of inhibition. All differences in reducing power disappear when, or soon after, the animals are killed by other agents before treatment with KMnO4.

Zusätzliches Material: 64 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050440305

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

31

Digitale Medien

The comparative morphology of the secondary sexual characters of elasmobranch fishes. The claspers, clasper siphons, and clasper glands, together with a dissertation on the Cowper's glands of Homo. Memoir XIThe figures are executed from the author's dissections and preparations by Miss Edith C. Humphreys, to whom best thanks are tendered. (1926)

Leigh-Sharpe, W. Harold

New York, NY : Wiley-Blackwell

Journal of Morphology 42 (1926), S. 349-358

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The claspers of Centrina are adnate with the pelvic fin and bear a spine as in other Spinacidae. Mustelus canis resembles M. lunulatus rather than M. vulgaris. The claspers of Chiloscyllium end in a pointed spike. Pseudotriakis resembles the Carchariidae. The three North American Atlantic species of the genus Raia are considered, and R. laevis and R. erinacea are placed in the pseudogenus containing R. batis, and a new pseudogenus erected for R. ocellata. A gross and histological account is given of the Cowper's glands of Homo, and they are shown to be homoplastic with clasper glands, similar in structure, arrangement, development, and function.

Zusätzliches Material: 12 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050420112

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

32

Digitale Medien

A new dorsal gland in the ground-squirrel, Callospermophilus, with a note on its anal glandThe author wishes here to acknowledge his gratitude to those who contributed to this investigation. The collection of dry skins in the American Museum of Natural History was placed at my disposal. The United States National Museum and the Museum of Vertebrate Zoölogy, University of California, kindly lent alcoholic specimens. The Museum of Zoölogy, University of Michigan, supported the field work. The use of the Alpine Laboratory of the Carnegie Institution of Washington was courteously granted. The author is indebted to Mr. C. H. Willey for his care in the preparation of the slides for microscopic study. (1926)

Hatt, Robert Torrens

New York, NY : Wiley-Blackwell

Journal of Morphology 42 (1926), S. 441-451

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: In the golden-mantled ground-squirrel, Callospermophilus, a spatulate glandular area has been noted in the skin of the back. It has been found in the following species: C. l. lateralis, C. l. arizonensis, C. l. caryi, C. l. saturatus, C. l. tescorum, C. c. chrysodeirus, and C. bernardinus. Probably it is common to the genus.The individual glands making up this area are modified and enlarged sudoriparous glands. They are divided into a tightly coiled and branched fundus, a large sinus, and a duct which passes caudad and outward to its exit at the surface.The glands secrete a strongly smelling oil, which is probably left on vegetation and other objects in the animal's environment and serves as a source of information to other members of the species. The glands are more active in spring and summer than in winter. They are stimulated by excitement. While present in both sexes, both adult and juvenile, they are best developed in adult males.Callospermophilus has three anal glands. These have flat-topped, straight-sided nipples which are protruded from the anus if the animal is frightened. A milky substance with a very weak odor can be extruded.

Zusätzliches Material: 11 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050420204

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

33

Digitale Medien

Studies in mammalian spermatogenesis VI. The chromosomes of the rabbitContribution no. 201 from the Department of Zoölogy, University of Texas. The writer was aided in this study by a grant from The Committee for Research on Sex Problems of the National Research Council. (1926)

Painter, Theophilus S.

New York, NY : Wiley-Blackwell

Journal of Morphology 43 (1926), S. 1-43

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The study is divided into three parts. Part I deals with the chromosome number and morphology in the amniotic cells of rabbit embryos. The number of chromosomes has been found essentially constant in amniotic cells of young, but more variable in older embryos. The somatic number is 44. Part II deals with the chromosomes of race crosses (Flemmish Giant X Polish) in which the homologous chromosomes were found to be alike. Part III deals with spermatogenesis. There are forty-four chromosomes in spermatogonia, and twenty-two in primary spermatocytes. The sex chromosomes are of the usual X-Y type.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050430102

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

34

Digitale Medien

Reversal of ciliary action in paramecium caudatumContribution from the Zoological Laboratory of the Johns Hopkins University and the Marine Biological Laboratory, Woods Hole. (1926)

Mast, S. O. ; Nadler, J. Ernest

New York, NY : Wiley-Blackwell

Journal of Morphology 43 (1926), S. 105-117

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: 1Monovalent cation salts induce reversal in the direction of the stroke of the cilia; bivalent and trivalent cation salts with a few exceptions do not. Some acids induce reversal, others do not.2The duration of reversed action varies with the kind of salt and with the concentration. As the concentration increases, the duration of reversed action increases to a maximum and then decreases to zero.3Bivalent and trivalent cation salts neutralize the effect of monovalent cation salts. The relative amount required varies with the kind of salt used and with the concentration.4The amount of a given salt required to neutralize another salt is not proportional to the concentration of the salt neutralized. Weber's law does not hold.5The results seem to indicate that ciliary reversal is associated with differential adsorption and consequent changes in electric potential, but that there are also other factors involved.

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050430106

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

35

Digitale Medien

Photoreceptors of Lumbricus terrestris, with special reference to their distribution, structure, and functionThis study was made at the zoölogical laboratory of The Johns Hopkins University and The Marine Biological Laboratory, Woods Hole, though chiefly at the former. (1925)

Hess, Walter N.

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1925), S. 63-93

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: A special type of cell, called ‘Lichtzellen’ by Hesse, was found in the photosensitive regions of the earthworm. Wherever the epidermis is most sensitive to light these cells are most abundant. They are found in the epidermis of all segments of the body and also in nerve enlargements of the prostomium and the caudal segment, but the intersegmental and ventral regions of the different segments, except the more distal ones, contain none of them. They are supplied by nerves and each contains a characteristic inner structure, the optic organelle, composed of a large central hyaline structure, the lens, which is surrounded by a dense network of nerve fibrillae, the retinella. In hanging drops the lens was found to focus light in the region of the retinella irrespective of the direction of the rays.These cells are similar in structure and function to the visual cells in leeches. Available data indicate that these cells function as photoreceptors and that the fibrillae of the retinella are the direct receptors of light stimuli.Pigment is not associated with the photoreceptors in a way that suggests direct functional relationship, but there is a subepidermal pigment layer through which pinhole windows admit light along the path of nerves to each of the nerve enlargements containing photoreceptor cells. These windows open in such directions as to determine the direction of withdrawal of the worm.

Zusätzliches Material: 18 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410105

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

36

Digitale Medien

Studies on the physiology of the liver VI. The effect of total removal of the liver in lower vertebratesContribution from the United States Fisheries Biological Station, Fairport, Iowa, and the Mayo Clinic. Read before Section F (Zoölogical Sciences) at the seventy-eighth meeting of the American Association for the Advancement of Science and the American Society of Zoölogists, Cincinnati, Ohio, December 27, 1923, to January 2, 1924. (1925)

Magath, Thomas B. ; Mann, Frank C.

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1925), S. 183-189

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The effect of removal of the liver has been noted in fishes, frogs, and turtles. As in the higher vertebrates, removal of the liver produced a fall in blood sugar and a loss in muscular tone. The lower vertebrates failed to respond to intravenous injections of glucose, as do the birds and mammals. They also fail to respond to maltose or levulose. The liver maintained the blood-sugar level in the lower vertebrates, which is necessary for the maintenance of life.The mechanism of carbohydrate metabolism in the lower vertebrates may be different from that in the higher ones, in that glucose, when injected intravenously, apparently exercises a progressively less beneficial effect on the characteristic hypoglycemic condition which follows the removal of the liver of mammals and cold-blooded vertebrates.

Zusätzliches Material: 2 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410108

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

37

Digitale Medien

Modification of development on the basis of differential susceptibility to radiation I. Fundulus heteroclitus and ultraviolet radiation (1925)

Hinrichs, Marie A.

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1925), S. 239-265

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: This paper reports experiments with Fundulus heteroclitus to modify larval development by means of ultraviolet radiation. Eggs were exposed to radiation at various intervals after fertilization for varying periods of time. The results accord with previous work on fish teratology, and the developmental types obtained are essentially similar to those produced by chemicals, cold, and hybridization. The deviations from normal development occur in the same body regions as do those in other vertebrates whose early development has been modified by the action of radiation (x-rays, radium, etc.).The results of these experiments indicate that there is a non-specificity in susceptibility relations with the production of similar types of monsters for widely different reagents. That these eggs are differentially susceptible to the action of ultraviolet radiation is indicated by the fact that those regions which have the highest metabolic activity when an inhibiting influence is active are the ones most generally affected. Thus modifications of the nervous system, sense organs, circulatory system, tail region, and body axis result, respectively, in the production of varying degrees of cyclopia, inadequate circulation, short, stubby or bent, non-motile tails (some bifid), and anterior twinning.As these modifications may be produced by applying inhibiting influences during the first few minutes after fertilization, it is evident that there is in the egg at this stage some constitutional or physiological basis which determines early differences in susceptibility of its various parts.

Zusätzliches Material: 31 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410111

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

38

Digitale Medien

The nature and inheritance of webbed toes in man (1926)

Straus, William L.

New York, NY : Wiley-Blackwell

Journal of Morphology 41 (1926), S. 427-439

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Webbing of toes or fingers in man is produced by a local arrest of development, causing retention of the normal embryonic webbing. This type of digital fusion involves only the skin, the skeleton being unaffected. The extensor tendons of the toes may sometimes be fused.Webbed digits occur normally in some marsupials, rodents, and insectivores, in a number of lemurs and catarrhines, and in the siamang and gorilla. They also may occur in varying degree in other Primates, notably Hylobates. An analysis of five new pedigrees together with those already published demonstrates that webbing of toes in man may be inherited in either a mendelian or sex-linked manner. In one case this character follows the course of the Y-chromosome.

Zusätzliches Material: 19 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050410206

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

39

Digitale Medien

Masthead (1928)

New York, NY : Wiley-Blackwell

Journal of Morphology 45 (1928)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050450101

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

40

Digitale Medien

The effects of certain physical and chemical factors on locomotion and others life-processes in Amoeba proteusThis investigation was suggested by Prof. S. O. Mast and carried out under his direction. He has also furnished valuable aid in the presentation of the results. For these favors, I am greatly indebted to him. (1928)

Hopkins, D. L.

New York, NY : Wiley-Blackwell

Journal of Morphology 45 (1928), S. 97-119

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Amoeba proteus was raised in a modified and diluted Ringer solution. When the pH of this culture medium became less than 6.0, the normal activities of the amoebae were interfered with; and when a still lower pH was attained, the amoebae died off. The same was true when the pH became greater than 8.0. At neutrality the activities were subnormal, very dark, and rounded. The rate of locomotion of amoebae raised in solutions with a pH less than 7.0 showed a maximum rate of locomotion at pH 6.6, which decreased as the pH changed in either direction, dropping to a very low rate at pH 7.0 and above and also below 6.0. For amoebae raised at a pH above 7.0 the rate was maximum at pH 7.6 and decreased as the pH changed in either direction; it was low at pH 7.0 and below and also above 8.0.On increasing the external osmotic pressure of the medium it was found that the effects caused varied somewhat with the hydrogen-ion concentration. Small increases in osmotic pressure decreased the rate from the normal at pH 6.0 and 8.0, increased it at pH 6.6 and 7.6, and did not affect it at pH 7.0. Osmotic pressures above that produced by M/20 lactose caused locomotion to cease in a short time at all pH values.

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050450104

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

41

Digitale Medien

The cranial musculature of the toadfish (Opsanus tau) (1928)

Pankratz, David S.

New York, NY : Wiley-Blackwell

Journal of Morphology 45 (1928), S. 209-231

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: The highly specialized cranial musculature of the toadfish is characterized by the following features: 1Absence of intermandibularis and branchiomandibularis muscles.2Presence of levator premaxillaris muscle.3Very large branchial chamber, the outer wall of which is formed by seven branchiostegal rays connected by a strong fascia provided with muscles (oblique levators and adductors).4Highly developed masticator muscles (adductor mandibularis and pterygoids).5The rectus abdominis, sternohyoid, and hyohyoid muscles are attached by a median aponeurosis to the hyoid and basibranchial elements and directly to the hypobranchial cartilages; this muscle complex depresses the buccal floor in opposition to the geniohyoid.6The pelvic fins are in the jugular position.7Two narrow muscles connect the cleithrum with the fourth ceratobranchial.8The cranial musculature is obviously adapted to a carnivorous habit and particularly for increasing respiratory capacity under asphyxial conditions.

Zusätzliches Material: 11 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050450107

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

42

Digitale Medien

Spiral movement in man (1928)

Schaeffer, A. A.

New York, NY : Wiley-Blackwell

Journal of Morphology 45 (1928), S. 293-398

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Blindfolded persons walk, run, swim, row, and drive automobiles in clock-spring spiral paths of greater or less regularity when attempting a straightaway. The spirals turn either right or left in one and the same individual, and may do so even in one experiment. But either right or left turns predominate in the great majority of individuals, often to a high degree. The paths show marked individuality, and there is some ground for thinking there exists a correlation between temperamental differences and general character of path.The mechanism which produces the spiral path is not located in the locomotor organs, but in the central nervous system and is probably identical essentially with the spiral mechanism in other motile organisms, all of which move in spiral paths when there are no guiding senses to direct the path. The clock-spring spiral in man is interpreted as the expression in two dimensions of space of a helical spiral mechanism which seems to exist in all motile organisms moving in three dimensions of space and in amebas which move in two dimensions. In a large number of lower organisms the number of body lengths per spiral turn is almost constant, being about 4.5. The smallest regular swimming spirals in man are very close to this value, but the smallest regular walking spirals are somewhat larger. The fundamental spiral mechanism seems to be of molecular dimensions, and there seems to exist a demonstrable locomotor bilateral asymmetry in very nearly, if not quite, all organisms.

Zusätzliches Material: 4 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050450110

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

43

Digitale Medien

The anatomy and life-history of a freshwater mollusk of the genus sphaeriumContributions from the Zoölogical Laboratory of the University of Illinois, no. 317. (1928)

Monk, Cecil R.

New York, NY : Wiley-Blackwell

Journal of Morphology 45 (1928), S. 473-503

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: A detailed study has been made of the anatomy of one of the fingernail shells, and preliminary observations on the life-history have been carried out. In its general organization Sphaerium notatum is very similar to the larger fresh-water lamellibranchs. A gastric shield, crystalline style, and style sac, very similar to those found in the stomach and intestine of Lampsilis, are present. A pair of slender muscles extending from the dorsal side of the body into the gills, and evidently not previously described, have been found. The nervous system consists of the typical three pairs of lamellibranchiate ganglia, with their connectives, accessory ganglia, and nerve fibers. Particular study was given to the statocysts and osphradia, and attention is called to the fact that the function commonly ascribed to the osphradia is incompatible with their position in the roof of the cloacal chamber.S. notatum, like all the Sphaeriidae, is hermaphroditic and viviparous. The gonads are paired racemose glands lying behind and below the stomach. The sperm-producing follicles form the anterior portion of each gonad and are somewhat smaller and more numerous than the ova-producing follicles which form the posterior portion. The young pass through the early stages of development in brood pouches in the gills and are expelled as relatively enormous individuals.Preliminary observations on the life-history indicate that reproduction reaches its height in the summer and that fertilization probably takes place during the late summer and fall.

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050450204

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

44

Digitale Medien

Developmental factors in teleost hybrids. I. The early mitotic behavior in the cross between menidia menidia notata ♀ and Prionotus carolinus ♂ (1928)

Pinney, Edith

New York, NY : Wiley-Blackwell

Journal of Morphology 45 (1928), S. 579-597

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: When Menidia eggs are fertilized with Prionotus sperm, the Prionotus chromosomes react in the Menidia cytoplasmic medium just as they do in the cytoplasm of Fundulus eggs. There is lagging, non-disjunction, and elimination of chromosomes during the early cell divisions. The mitotic behavior of the Prionotus sperm in the Menidia egg also resembles the behavior of the sperm of Ctenolabrus in the same medium. This behavior which was expected from what was known concerning the mitotic behavior of the reciprocal crosses between Menidia and Fundulus and between Ctenolabrus and Prionotus and other intercrosses between the members of these two groups is regarded as a function of the physical state of the egg cytoplasm during the division phase of mitosis. This physical character forms the earliest differential factor in the development of these hybrids and shows no correlation with the width of the cross.A comparison of nine teleost crosses, in which both the development and the early mitotic behavior are known, with a rough numerical estimate of the width of the cross brought out the fact that development is most successful in crosses between nearly related species if mitosis is normal and in distantly related crosses if mitosis is abnormal. This indicates that nuclear relationship is also a factor in the development of hybrids.

Zusätzliches Material: 2 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050450208

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

45

Digitale Medien

Growth of paramecia in pure cultures of pathogenic bacteria and in the presence of soluble products of such bacteriaSubmitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Graduate School of the University of Missouri. (1928)

Philpott, C. H.

New York, NY : Wiley-Blackwell

Journal of Morphology 46 (1928), S. 85-129

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Virulent hay-infusion cultures of Bacillus pyocyaneus are toxic to pure-line races of three species of paramecia, but these races may acquire a tolerance for this toxic agent. Races with acquired tolerance have been grown for long periods of time in toxic, pure cultures of B. pyocyaneus by means of the daily-isolation culture method, and here the average division rate is as high as, or higher than, in the chance-mixed bacterial cultures in which these protozoa are usually maintained in the laboratory. The tolerance is lost, however, when the paramecia are removed from the toxic cultures and grown for a number of generations in cultures of non-toxic bacteria.The toxic agent that is lethal to paramecía is probably the soluble toxin of B. pyocyaneus. The investigation shows that the agent is soluble and either thermolabile or volatile. It also shows that all deleterious substances, other than the soluble toxin, known to be produced in cultures of this bacillus, are non-lethal to paramecia.Hay-infusion cultures of Bacillus enteritidis were lethal to paramecia. All attempts to develop tolerance in paramecia for the toxic agent in these cultures failed.Under the experimental conditions that prevailed, diphtheria toxin was found to have no appreciable effect upon the division rate or death rate in three species of paramecia.

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050460104

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

46

Digitale Medien

Abnormal feather germ organization with asymmetrical expression in a Rhode Island Red fowlScientific Paper no. A244. Contribution no. 2178 of the Maryland Agricultural Experiment Station (Department of Poultry Husbandry). (1950)

Juhn, Mary

New York, NY : Wiley-Blackwell

Journal of Morphology 86 (1950), S. 47-57

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 1 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050860104

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

47

Digitale Medien

Studies on the organogenesis in vitro of the urodele limb budFrom a thesis submitted to the faculty of the Graduate School of Princeton University in partial fulfillment of the requirements in candidacy for the Ph.D. degree. (1950)

Wilde, Charles E.

New York, NY : Wiley-Blackwell

Journal of Morphology 86 (1950), S. 73-113

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 2 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050860106

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

48

Digitale Medien

On the mitochondrial nature of the pigmented granules in stentor and blepharisma (1950)

Weisz, Paul B.

New York, NY : Wiley-Blackwell

Journal of Morphology 86 (1950), S. 177-184

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050860109

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

49

Digitale Medien

Masthead (1950)

New York, NY : Wiley-Blackwell

Journal of Morphology 86 (1950)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050860101

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

50

Digitale Medien

The morphology of the oviduct of virgin heifers in relation to the estrous cyclePublished with the approval of the Director of the Wisconsin Agricultural Experiment Station. Project no. 622-V: Trichomoniasis and other reproductive diseases of cattle. Supported in part by the Research Committee of the Graduate School from funds supplied by the Wisconsin Alumni Research Foundation.The authors are indebted to Dr. Alvin F. Weber, Department of Veterinary Science, University of Wisconsin, for certain materials and aid throughout these studies. (1950)

Lombard, Louise ; Morgan, Banner Bill ; McNutt, Samuel H.

New York, NY : Wiley-Blackwell

Journal of Morphology 86 (1950), S. 1-23

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 1 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050860102

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

51

Digitale Medien

The effects of local x-ray irradiation on the tail development of young axolotlsThis work was supported by grants from The National Cancer Advisory Council. (1950)

Brunst, V. V.

New York, NY : Wiley-Blackwell

Journal of Morphology 86 (1950), S. 115-151

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 8 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050860107

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

52

Digitale Medien

Hormone-induced sexual cycles of flagellates II. Gametggenesis, fertilization, and one-division meiosis in oxymonas (1950)

Cleveland, L. R.

New York, NY : Wiley-Blackwell

Journal of Morphology 86 (1950), S. 185-213

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050860110

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

53

Digitale Medien

Observations on the structure of grasshopper chromosomes subjected to a new acetocarmine treatmentContribution no. 224 from the Zoological Institute, Faculty of Science, Hokkaido University, Sapporo, Japan. (1950)

Makino, Sajiro ; Momma, Eizi

New York, NY : Wiley-Blackwell

Journal of Morphology 86 (1950), S. 229-251

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050860202

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

54

Digitale Medien

The skeletal structure of the gonopodium and gonopodial suspensorium of Anableps anableps (1950)

Turner, C. L.

New York, NY : Wiley-Blackwell

Journal of Morphology 86 (1950), S. 329-365

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050860206

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

55

Digitale Medien

Observations on the skeleton of African dwarf goats (1950)

Chang, Tso Kan ; Landauer, Walter

New York, NY : Wiley-Blackwell

Journal of Morphology 86 (1950), S. 367-379

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050860207

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

56

Digitale Medien

Hormone-induced sexual cycles of flagellates. VII. One-division meiosis and autogamy without cell division in Urinympha (1951)

Cleveland, L. R.

New York, NY : Wiley-Blackwell

Journal of Morphology 88 (1951), S. 385-439

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 2 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050880302

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

57

Digitale Medien

The epithelial components and their seasonal changes in the pituitary gland of the carp (Cyprinus carpio, L.) and goldfish (Carassius auratus, L.)Based on a thesis submitted to the Graduate School of Harvard University, Cambridge, Massachusetts in partial fulfillment of the requirements for the degree of Doctor of Philosophy. (1951)

Scruggs, Walter M.

New York, NY : Wiley-Blackwell

Journal of Morphology 88 (1951), S. 441-469

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050880303

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

58

Digitale Medien

Addendum (1950)

New York, NY : Wiley-Blackwell

Journal of Morphology 87 (1950), S. 455-455

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050870304

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

59

Digitale Medien

Nucleic acids and proteins of the nuclei of parameciumSubmitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the Faculty of Pure Science, Columbia University, New York City, 1949. (1950)

Moses, Montrose J.

New York, NY : Wiley-Blackwell

Journal of Morphology 87 (1950), S. 493-535

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050870306

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

60

Digitale Medien

The discharge of nematocysts of hydra, with special reference to the penetrant (1951)

Kepner, William A. ; Reynolds, Bruce D. ; Goldstein, Lewis ; [weitere]

New York, NY : Wiley-Blackwell

Journal of Morphology 88 (1951), S. 23-47

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050880103

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

61

Digitale Medien

Conjugation in Paramecium bursaria. IV. Nuclear behavior in conjugation between old and young clonesThis work has been aided by grants from the Committee for Research in Problems of Sex, National Research Council; from the Joseph Henry Fund of the National Academy of Sciences; and from the Permanent Science Fund of the American Academy of Arts and Sciences. (1951)

Chen, Tze-Tuan

New York, NY : Wiley-Blackwell

Journal of Morphology 88 (1951), S. 293-359

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050880205

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

62

Digitale Medien

Masthead (1952)

New York, NY : Wiley-Blackwell

Journal of Morphology 90 (1952)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050900201

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

63

Digitale Medien

The spermiogenic nature of the “mantle bodies” in the aberrant rhizocephalid, mycetomorphaSupported in part by a grant from The Catholic University of America Research Fund. (1951)

Reinhard, Edward G. ; Evans, Joseph T.

New York, NY : Wiley-Blackwell

Journal of Morphology 89 (1951), S. 59-69

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050890105

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

64

Digitale Medien

The development of secondary tails in young axolotls after local x-ray ibradiationThis work was supported by grants from the National Cancer Institute of U.S.P.H.S. and the Anna Fuller Fund. (1951)

Brunst, V. V. ; Figge, Frank H. J.

New York, NY : Wiley-Blackwell

Journal of Morphology 89 (1951), S. 111-133

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050890108

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

65

Digitale Medien

Masthead (1951)

New York, NY : Wiley-Blackwell

Journal of Morphology 89 (1951)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050890201

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

66

Digitale Medien

Observations on some intestinal flagellates from reptilian host (Squamata)A dissertation in zoology presented to the faculty of the Graduate School of the University of Pennsylvania in partial fulfillment of the requirements for the degree of Doctor of Philosophy. (1951)

Moskowitz, Norman

New York, NY : Wiley-Blackwell

Journal of Morphology 89 (1951), S. 257-321

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050890204

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

67

Digitale Medien

The mouse thyroid and radioactive iodine (I131)This document is based on work performed under Contract AT-30-1GEN-0 for The Atomic Energy Commission. (1951)

Rugh, Roberts

New York, NY : Wiley-Blackwell

Journal of Morphology 89 (1951), S. 323-365

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050890205

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

68

Digitale Medien

Studies on arthropod cuticle VI. Intracellular and extracellular formation of cuticle in the developing posterior spiracular chamber of a blowfly larva (Phormia regina)Paper no. 2274 of the Scientific Journal Series, Minnesota Agricultural Experiment Station, St Paul 1, Minnesota.The work described in this paper was done under contract between the Office of the Surgeon General, U. S. Army and the University of Minnesota. Under the terms of this contract the Office of the Surgeon General neither restricts nor is responsible for the conclusions of the authors.A preliminary treatment of this material was presented by M.B.C. in partial fulfillment of the requirements for the degree of Master of Science. (1951)

Clausen, Marion B. ; Glenn Richards, A.

New York, NY : Wiley-Blackwell

Journal of Morphology 89 (1951), S. 199-215

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050890202

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

69

Digitale Medien

Age changes in the testis of the teleost, astyanax mexicanus (1951)

Rasquin, Priscilla ; Hafter, Ethel

New York, NY : Wiley-Blackwell

Journal of Morphology 89 (1951), S. 397-407

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050890302

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

70

Digitale Medien

Masthead (1952)

New York, NY : Wiley-Blackwell

Journal of Morphology 90 (1952)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050900101

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

71

Digitale Medien

Birefringenoe of the dividing cellThe authors wish to thank Prof. J. Koana for the specially made slides and cover slips which he generously put at their disposal. They are also indebted to Miss K. Okazaki, who collected the data on the cortical birefringence of sea-urchin eggs, and to Dr. J. C. Dan for assistance in the preparation of the manuscript. Finally, the present research was made possible by a fund offered by the Nagai Women's Association, Nagai-machi, Yokosuka City, to which the authors express their gratitude. (1951)

Inouéa, Shinya ; Dan, Katsuma

New York, NY : Wiley-Blackwell

Journal of Morphology 89 (1951), S. 423-455

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050890304

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

72

Digitale Medien

The ciliary feeding mechanism of Neothyris lenticularis (Deshayes) (1952)

Richards, Joyce R.

New York, NY : Wiley-Blackwell

Journal of Morphology 90 (1952), S. 65-91

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 6 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050900104

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

73

Digitale Medien

Diploid virgin frog eggs; a possible origin of diploid parthenogenetically developed frog larvae without delay in cleavage and of triploid larvae developed from fertilized eggsThese observations were made at the University of Pennsylvania and The Marine Biological Laboratory, Woods Hole, Mass., with the aid of a grant from the Committee on Research at the University of Pennsylvania. (1952)

Parmenter, Charles L.

New York, NY : Wiley-Blackwell

Journal of Morphology 90 (1952), S. 243-261

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050900204

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

74

Digitale Medien

The development of glandiceps (Enteropneusta; spengelidae) (1953)

Rao, K. Pampapathi

New York, NY : Wiley-Blackwell

Journal of Morphology 93 (1953), S. 1-17

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 7 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050930102

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

75

Digitale Medien

The time of migration of axolotl melanoblasts (1953)

Frost, David ; Dalton, H. Clark

New York, NY : Wiley-Blackwell

Journal of Morphology 93 (1953), S. 101-108

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 2 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050930106

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

76

Digitale Medien

An anatomical study of the male reproductive system of a Virginia millipedeThis paper is a portion of a dissertation (An Anatomical and Cytological Study of the Male Reproductive System of a Virginia Millipede, '52) submitted by the author to the Gradulate Faculty of the University of Viriginia in partial fulfillment of the requirements for the degree of Doctor of Philosophy. The work was done at the University of Virginia. (1953)

West, Warwick R.

New York, NY : Wiley-Blackwell

Journal of Morphology 93 (1953), S. 123-175

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050930108

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

77

Digitale Medien

Masthead (1953)

New York, NY : Wiley-Blackwell

Journal of Morphology 93 (1953)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050930301

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

78

Digitale Medien

The urogenital organs of the cottontail rabbit (Sylvilagus floridanus)Aided by grants from the National Research Council, Committee for Research in Problems of Sex, grants administered by Prof. Emil Witschi. (1952)

Elchlepp, J. G.

New York, NY : Wiley-Blackwell

Journal of Morphology 91 (1952), S. 169-198

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050910108

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

79

Digitale Medien

Hormone-induced sexual cycles of flagellates. VIII. Meiosis in rhynchonympha in one cytoplasmic and two nuclear divisions followed by autogamy (1952)

Cleveland, L. R.

New York, NY : Wiley-Blackwell

Journal of Morphology 91 (1952), S. 269-323

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050910205

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

80

Digitale Medien

A study of the fine structure of ciliated epithelia (1954)

Fawcett, Don W. ; Porter, Keith R.

New York, NY : Wiley-Blackwell

Journal of Morphology 94 (1954), S. 221-281

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050940202

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

81

Digitale Medien

Masthead (1954)

New York, NY : Wiley-Blackwell

Journal of Morphology 94 (1954)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050940301

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

82

Digitale Medien

The musculature of the head of the phantom crane fly larva bittacomorpha (diptera, ptychopteridae) (1954)

Kramer, Sol

New York, NY : Wiley-Blackwell

Journal of Morphology 94 (1954), S. 409-437

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 4 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050940206

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

83

Digitale Medien

Masthead (1954)

New York, NY : Wiley-Blackwell

Journal of Morphology 95 (1954)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050950101

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

84

Digitale Medien

Corpus luteum formation and follicular atresia in the common garter snake, Thamnophis sirtalis (1952)

Bragdon, Douglas E.

New York, NY : Wiley-Blackwell

Journal of Morphology 91 (1952), S. 413-445

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050910303

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

85

Digitale Medien

Do mitochondria divide? (1952)

Payne, Fernandus

New York, NY : Wiley-Blackwell

Journal of Morphology 91 (1952), S. 555-567

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050910309

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

86

Digitale Medien

Masthead (1952)

New York, NY : Wiley-Blackwell

Journal of Morphology 91 (1952)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050910301

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

87

Digitale Medien

Hartmannella astronyxis: A new species of free-living ameba. Cytology and life cycleThis investigation, part of a comprehensive study of H. astronyxis, is supported by the Fund for Research in Biology and Medicine, Initiative 171, State of Washington. (1954)

Ray, D. L. ; Hayes, Robert E.

New York, NY : Wiley-Blackwell

Journal of Morphology 95 (1954), S. 159-188

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050950108

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

88

Digitale Medien

Masthead (1954)

New York, NY : Wiley-Blackwell

Journal of Morphology 95 (1954)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050950301

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

89

Digitale Medien

The effects of varying dosage of radioactive phosphorus (P32) in the early chick embryoI am indebted to Dr. John S. Latta for helpful advise during the research and preparation of the manuscript and to Miss Rose Reynolds for preparing the figures. (1954)

Chapman, Arthur O.

New York, NY : Wiley-Blackwell

Journal of Morphology 95 (1954), S. 451-469

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 1 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050950304

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

90

Digitale Medien

The structure of ciliated epithelial cells as revealed by the electron microscope and in phase-contrast (1953)

Worley, Leonard G. ; Fischbein, Ernest ; Shapiro, Jennie E.

New York, NY : Wiley-Blackwell

Journal of Morphology 92 (1953), S. 545-577

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050920307

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

91

Digitale Medien

Histochemical evidence of early differentiation of the suprarenal gland of the chick (1953)

Dawson, Alden B.

New York, NY : Wiley-Blackwell

Journal of Morphology 92 (1953), S. 579-595

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050920308

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

92

Digitale Medien

Analysis in vitro of the early organization of the rudiment of the mouse submandibular gland (1953)

Grobstein, Clifford

New York, NY : Wiley-Blackwell

Journal of Morphology 93 (1953), S. 19-43

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050930103

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

93

Digitale Medien

A quantitative histological analysis of forelimb regeneration in triturus viridescensA thesis submitted to the faculty of Princeton University in partial fulfillment of the requirements for the degree of Doctor of Philosophy. (1954)

Chalkley, Donald Thomas

New York, NY : Wiley-Blackwell

Journal of Morphology 94 (1954), S. 21-70

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 16 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050940103

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

94

Digitale Medien

Developmental stages in the life cycle of echinoparyphium flexum (linton, 1892) dietz, 1910 (trematoda: Echinostomatidae)Part of a dissertation submitted in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the University of Michigan ('53). (1954)

Najarian, Haig H.

New York, NY : Wiley-Blackwell

Journal of Morphology 94 (1954), S. 165-197

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 1 Tab.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050940106

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

95

Digitale Medien

The effects of ultraviolet, and of photorecovery, on the developing forelimb of amblystomaFrom a thesis submitted to the faculty of the Graduate School of Princeton University in partial fulfillment of the requirements in candidacy for the Ph.D. degree.This investigation was supported in part by a research grant (C-1499) from the National Cancer Institute, of the National Institutes of Health, Public Health Service. (1954)

Rieck, Alvin F.

New York, NY : Wiley-Blackwell

Journal of Morphology 94 (1954), S. 367-407

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Zusätzliches Material: 3 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1050940205

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

96

Digitale Medien

The anatomy of the adult uropodid Fuscouropoda agitans (Arachnida; Acari), with comparative observations on other Acari (1976)

Woodring, J. P. ; Galbraith, C. A.

New York, NY : Wiley-Blackwell

Journal of Morphology 150 (1976), S. 19-58

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: A thin, compressible, lateral suture and ventral plate overlap permit limited movement of the thick and rigid dorsal and ventral plates of Fuscouropoda agitans. Seven pairs of large dermal glands debouch onto the surface. Trochanteral rotation permits defensive leg adpresion and an insectan type of ambulation. The complex hypopharynx-pedipalpal-coxae has a buccal and cheliceral cavity separated by an atriculated epipharynx. The pharynx is Y-shaped in cross section. Extensive paired salivary glands lie above the very long and dexterous 3-segmented chelicerae, and a large pair of coxal glands debouch on coxae 1. From four blunt-ended tracheae, bundles of unbranching tracheoles extend in specific tracts to all organs. The ventriculus is small with three pairs of large caeca; a tightly packed single layer of digestive cells individually enlarged to absorb-phagocytize and digest the food. A typical mesostigmatid excretory tube is present. A typical acarine synganglion is present; mixed nerves have a basal swelling. A postulated neurosecretory organ arises from the pedipalpal nerve. The oocytes enlarge within funicular stalks from the walls of the small median ovary. A large spermatophore is stored in the seminal vesicle; fertilization occurs during oviposition. A tension hinge partially opens both male and female genital plates; closure effected by muscles acting on very long genital plate apodemes. Within sequentially produced spermatogonial cysts of the testes, meiosis is completely synchronous. A large, multilobed male accessory gland produces a large volume of seminal fluid; a mixture of at least four secretions. The origins and msertions of the body wall, genital organ, digestive tract, mouthpart and leg muscles are listed and illustrated. A comparison of anactinotrichid and actinotrichid mites indicates fundamental and consistent morphological differences in aspects of the cuticle, leg articulations, digestive system, excretory system, reproductive system and coxal glands.

Zusätzliches Material: 21 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1051500103

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

97

Digitale Medien

Development of butterfly scales. II. Struts, lattices and surface tension (1976)

Ghiradella, H. ; Radigan, W.

New York, NY : Wiley-Blackwell

Journal of Morphology 150 (1976), S. 279-297

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: An investigation of the structure of the iridescent scales of the green hairstreak, Callophrys rubi, reveals an internal lattice which is probably cubic close-packed in form. We present a model which explains the formation of the lattice in terms of packing of spheres and surface tension forces and generalize these results to internal structures in other Lepidopteran scales.

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1051500202

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

98

Digitale Medien

Labellar taste organs of Drosophila melanogasterWe wish to acknowledge with appreciation the excellent assistance of Mrs. R. Timberg with the transmission-electronmicroscope preparation and of Mr. T. Arad with the scanning-electron-microscope preparation.Parts of this study were supported by the Israel Commission for Basic Research. (1976)

Falk, Raphael ; Bleiser-Avivi, Naomi ; Atidia, Judith

New York, NY : Wiley-Blackwell

Journal of Morphology 150 (1976), S. 327-341

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: There are 36 to 42 taste bristles on each half of the labellum of Drosophila melanogaster; most of them are two-pronged with a pouch between them. Some end bluntly with a pore at the tip.Each taste-bristle has two lumina: one is circular, the other crescent-like in cross section. In most bristles four dendrites of chemoreceptor neurons run along the circular lumen. In five to seven taste-bristles only two chemoreceptor neurons are found. A mechanoreceptor neuron sends a dendrite to the base of each taste-bristle.The dendrites are surrounded by four concentrically-arranged sheath cells. The inner cell secretes the cuticular sheath; cells II and III are presumably two trichogens, one secreting the bristle material around the circular lumen, the other around the crescent-like lumen. Cell IV, especially rich in bundles of microtubules, secretes the cuticle of the socket, and corresponds to the tormogen. The neurons have the typical structure found in insect sensilla. In many sensilla one neuron is less electron-dense than the others and may be the water-sensor.On the medial side of the labellum between the pseudotracheae are rows of taste pegs covered by folds. In each peg one chemoreceptor and one mechanoreceptor are found.The number of axons in each labial nerve agrees with the total number of dendrites in all taste organs of each lobe.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1051500206

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

99

Digitale Medien

Masthead (1976)

New York, NY : Wiley-Blackwell

Journal of Morphology 150 (1976)

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1051500301

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext

100

Digitale Medien

Blood vascular system of the sea cucumber, Stichopus moebii (1976)

Herreid, Clyde F. ; LaRussa, Vincent F. ; DeFesi, Charles R.

New York, NY : Wiley-Blackwell

Journal of Morphology 150 (1976), S. 423-451

zur Merkliste hinzufügen auf der Merkliste

Details

ISSN: 0362-2525

Schlagwort(e): Life and Medical Sciences ; Cell & Developmental Biology

Quelle: Wiley InterScience Backfile Collection 1832-2000

Thema: Biologie , Medizin

Notizen: Stichopus moebii, a sea cucumber, has a closed circulatory system which is unique in its degree of development for the phylum Echinodermata. The gross anatomy, histology and fine structure of the system were studied. Blood vessels consist of a coelomic surface of ciliated epithelium, a layer of muscle and nerve cells, followed by connective tissue and luminal lining of endothelium. Basically the blood vascular system consists of two major vessels running parallel to the gut: the dorsal vessel pumps colorless blood via the vessels within the walls of the intestine into the ventral vessel. There are two specialized areas of the circulation: (1) At the upper small intestine 120 to 150 muscular single-chambered hearts pump blood from the dorsal vessel into a series of intestinal plates. (2) At the lower region of the small intestine the vasculature is associated with the left respiratory tree. Blood passing from the dorsal pulmonary vessel can take two routes to the gut, it either passes through myriads of minute respiratory shunt vessels entangled with the respiratory tree or it passes through a unique follicle network consisting of tiny channels periodically dilated into chambers filled with iron deposits, necrotic cells and developing coelomocytes.

Zusätzliches Material: 5 Ill.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1002/jmor.1051500211

Permalink

	Standort	Signatur	Erwartet	Verfügbarkeit

Andere fanden auch interessant ...

Artikel (Nationallizenzen)

Volltext