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  • Springer  (21)
  • Wiley-Blackwell  (7)
  • Blackwell Publishing Ltd  (1)
  • Copernicus
  • 1975-1979  (22)
  • 1940-1944  (7)
  • 1
    Electronic Resource
    Electronic Resource
    Hysteresis of Contraction-Extension Cycle of Glycerinated Vorticella (1979)
    Oxford, UK : Blackwell Publishing Ltd
    The @journal of eukaryotic microbiology 26 (1979), S. 0 
    Details
    ISSN: 1550-7408
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: SYNOPSIS. The helical coiling state of a glycerinated stalk in the family Vorticellidae had been regarded, without any evidence, as a reversible and completely equilibrated mechano-chemical system regulated by the external free Ca2+ concentration. Our present detailed observations of many individual stalks of glycerinated Vorticella convallaria revealed that the contraction-extension cycle of the helical stalks caused by increasing and decreasing free Ca2+ concentrations in the medium represents a kind of hysteresis. This phenomenon was observed in extensively glycerinated Vorticella in a medium of very low or physiological ionic strength, as well as in briefly glycerinated ciliates. With regard to the configurational change in various parts of a glycerinated stalk during the contraction-extension cycle, it was found that the initial bending of the stalk caused by increasing free Ca2+ concentration begins to take place near the zooid (head) while the initial reextension of the stalk with decreasing free Ca2+ concentration begins to take place near the zooid (head) while the initial reextension of the stalk with decreasing free Ca2+ concentration takes place simultaneously throughout the entire stalk. The Ca2+ threshold for complete reextension of the part of the stalk near the rootlet was found to be much higher than that near the zooid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1550-7408.1979.tb04647.x
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  • 2
    Electronic Resource
    Electronic Resource
    The evolution of the environment and its influence on the evolution of life (1978)
    Springer
    Origins of life and evolution of the biospheres 9 (1978), S. 81-91 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract Thermodynamic data and known paleogeological data were used to deduce when and what elements (compounds) were readily available during the whole history of the earth. On the basic assumption that available compounds would dictate the type of organisms to emerge, we attempted to derive a kind of evolutionary tree. This was then compared with the existing evolutionary trees derived from the sequences of proteins and polynucleotides.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00931406
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  • 3
    Electronic Resource
    Electronic Resource
    Specific reaction of aloe extract with serum proteins of various animals (1978)
    Springer
    Cellular and molecular life sciences 34 (1978), S. 523-524 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary We found that aloe extract contains a lectin-like substance which reacts with serum proteins of various animals. Furthermore, in human serum 2 proteins,a 2-macroglobulin anda 1-antitrypsin, were shown to be reactive with aloe extract.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01935968
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  • 4
    Electronic Resource
    Electronic Resource
    Mauritius type black rats with peculiar karyotypes derived from robertsonian fission of small metacentrics (1979)
    Springer
    Chromosoma 75 (1979), S. 51-62 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract All seventeen black rats collected from Mauritius Island were characterized by having many extra small acrocentric autosomes. Their basic karyotype was of Oceanian type, because of the presence of the large metacentric M1 and M2 pairs, but chromosome numbers in 13 specimens among them were 42, those of 3 specimens 43, and those of the remaining one specimen 44. Although the Oceanian type rat had 2 small acrocentric autosomes (pair no. 13), 16 Mauritius rats had 10 small acrocentrics, and the remaining one had 8 small acrocentrics. Comparative karyotype analysis between Oceanian and Mauritius type rats showed that the extra small acrocentrics found in Mauritius rats were due to Robertsonian fission of small metacentric pairs no. 14 and 18 of the original Oceanian type rat. Only one rat with 8 small acrocentrics showed the heteromorphic pair no. 18 consisting of one metacentric and two acrocentrics. The large metacentric M1 chromosome in 13 of 17 rats examined showed homologous pair, but two of them were heteromorphic by involving one metacentric M1 and two acrocentrics. In the remaining two rats M1 chromosome was not observed, but acrocentric pairs no. 4 and 7 were included. These acrocentrics were also suggested to be originated from Robertsonian fission of the large metacentric M1 chromosome. Robertsonian fission seemed to be one of the important mechanism found in karyotype evolution.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00330624
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  • 5
    Electronic Resource
    Electronic Resource
    Meromorphic mappings onto compact complex spaces of general type (1975)
    Springer
    Inventiones mathematicae 31 (1975), S. 7-16 
    Details
    ISSN: 1432-1297
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01389863
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  • 6
    Electronic Resource
    Electronic Resource
    On holomorphic curves in algebraic varieties with ample irregularity (1977)
    Springer
    Inventiones mathematicae 43 (1977), S. 83-96 
    Details
    ISSN: 1432-1297
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01390205
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  • 7
    Electronic Resource
    Electronic Resource
    The group of isometries of a left invariant Riemannian metric on a Lie group (1976)
    Springer
    Mathematische Annalen 223 (1976), S. 91-96 
    Details
    ISSN: 1432-1807
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01360280
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  • 8
    Electronic Resource
    Electronic Resource
    Cytological evidence for different types of cerebrospinal fluid-contacting subependymal cells in the preoptic and infundibular recesses of the frog (1977)
    Springer
    Cell & tissue research 176 (1977), S. 317-334 
    Details
    ISSN: 1432-0878
    Keywords: CSF-contacting subependymal cells ; Frog hypothalamus ; Fluorescence microscopy ; Autoradiography ; Ultrastructure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Blue-green fluorescent subependymal cells with intraventricular processes were shown by the fluorescent histochemical method to be distributed from the preoptic recess to the infundibular recess of the frog hypothalamus. Electron microscopy revealed at least two types of CSF-contacting subependymal cells, type 1 containing large dense granules (about 100–200 nm in diameter) and type 2 containing small dense core vesicles (about 60–100 nm in diameter). Subsequent to fixation in permanganate solution, the small dense core vesicles in type 2 cells reacted with the fixative and consistently showed a dense content. However, the large granules in type 1 cells were mostly pale or less dense after this fixation. Two hours after intraventricular injection of 3H-dopamine, a large number of silver grains appeared only in the cytoplasm of intraventricular processes possessing dense core vesicles (type 2 cells). A few grains were also found in the perikarya. It is concluded that type 2 cells are catecholamine-storing cells. It is suggested that type 1 cells in the infundibular recess are peptidergic neurons which may secrete some hypothalamic regulating hormones of the anterior pituitary. Most of these cells in the preoptic recess belong to the neurosecretory cells of the preoptic nucleus, while some cells probably function similarly to those in the infundibular recess.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00221791
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  • 9
    Electronic Resource
    Electronic Resource
    Mechanische und thermische Eigenschaften von mit Borax vernetztem Polyvinylalkohol (1978)
    Springer
    Colloid & polymer science 256 (1978), S. 192-192 
    Details
    ISSN: 1435-1536
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01679341
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  • 10
    Electronic Resource
    Electronic Resource
    Deformation parameters in single steel wire-copper matrix composites (1979)
    Springer
    Journal of materials science 14 (1979), S. 1187-1191 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract By using the single carbon-steel fibre-copper matrix composites, the important parameters controlling dislocation motions in the fibre, matrix and composite, namely flow stress, internal stress, effective stress, change in flow stress due to change in strain-rate or temperature, stress exponent of strain-rate, effective stress exponent of dislocation velocity, activation volume and activation enthalpy were measured at the stage in which the mechanical interaction between the components was negligible. It was found that all the composite parameters were determined only by the properties of the components and for each parameter, a modified rule of mixtures was derived.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00561304
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