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  • Life and Medical Sciences  (112)
  • Aircraft Design, Testing and Performance  (2)
  • Analytical Chemistry and Spectroscopy
  • 1970-1974
  • 1955-1959
  • 1950-1954
  • 1935-1939  (114)
  • 1936  (114)
Collection
Keywords
Publisher
Years
  • 1970-1974
  • 1955-1959
  • 1950-1954
  • 1935-1939  (114)
Year
  • 1
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    Relative Efficiencies and Design Charts for Various Engine-Propeller Combinations, Special Report (1936)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: The relative efficiencies of various engine-propeller combinations were the subject of a study that covered the important flight conditions, particularly the take-off. Design charts that graphically correlate the various propeller parameters were prepared to facilitate the solution of problems and also to c1arify the conception of the relationships of the various engine-propeller design factors. It is shown that, among the many methods for improving the take-off thrust, the use of high-pitch, large-diameter controllable propellers turning at low rotational speeds is probably the most generally promising. With such a combination the take-off thrust may be further increased, at the expense of a small loss in cruising efficiency, by compromise designs wherein the pitch setting is slightly reduced and the diameter is further increased. The degree of compromise necessary to accomplish the maximum possible take-off improvement depends on such design factors as overspeeding and overboosting at take-off as well as depending on the design altitude. Both overspeeding and designing for altitude operation have the same effect on the take-off thrust as compromising in that the propulsive efficiency is increased thereby; boosting the engine, however, has the reverse effect on the propulsive efficiency, although the brake horsepower is increased.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-SR-55
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    Tank Tests of the Effect of Rivet Heads, etc., on the Water Performance of a Seaplane Float, Special Report (1936)
    In:  CASI
    Details
    Publication Date: 2019-07-12
    Description: A 1/3.5 full-size model of the Mark V float of the Bureau of Aeronautics, Navy Department, was tested in the NACA tank both with smooth painted bottom surfaces and with roundhead rivets, plate laps, and keel plates fitted to simulate the actual bottom of a metal float. The augmentation in water resistance due to the added roughness was found to be from 10-12% at the hum speed and from 12-14% at high speeds. The effect of the roughness of the afterbody was found to be negligible except at high trims. The model data were extrapolated to full size by the usual method which assumes the forces to vary according to Froude's law, and in the case of the smooth model by a method of separation that takes into account the effect of scale on the frictional resistance. It was concluded that the effect of rivet heads on the takeoff performance of a relatively high-powered float seaplane is of little consequence but that it may be of greater importance in the case of more moderately powered flying boats.
    Keywords: Aircraft Design, Testing and Performance
    Type: NACA-SR-51
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    NASA TECHNICAL REPORTS
  • 3
    Electronic Resource
    Electronic Resource
    Masthead (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936) 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050590101
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  • 4
    Electronic Resource
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    The histology of the paraphysis of Amblystoma (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 1-10 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The paraphysis of adult Amblystoma is made up of low columnar ependymal epithelit m which forms the paraphyseal tubules which end blindly and which communicate with one another by a common mouth with the third ventricle. Between the paraphyseal tubules venous sinusoids anastomose freely with one another forming a complicated rete. The sinusoids are made up entirely of endothelium. The blood supply to the paraphysis is entirely venous.Mitochondria were found in great abundance in the paraphysis of one female just previous to laying. Other specimens showed very few present. No conclusions can be drawn from these few observations as to the relationship between physiological activity and cellular structures.The Golgi apparatus was observed definitely localized between the nucleus and the ventricular end of the cell.Many large crystalloids were also observed to be localized between the nucleus and the ventricular end of the cell.Intercellular spaces are readily observed in sections stained with Mallory's connective tissue stain. Nassonow's osmic acid technique for the Golgi apparatus and Benda's crystal violet and alizarin stain clearly bring out the intercellular canals. Acid fuchsin stained particles within the intercellular spaces are more abundant toward the sinusoids than the cavities of the paraphyseal tubules. The intercellular canals have not been seen to communicate with either the sinusoids or the cavities of the paraphyseal tubules in any of the preparations observed.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050590102
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  • 5
    Electronic Resource
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    Studies on cell number and the progression factor in the growth of Japanese beetle larvae (Popillia japonica Newman) (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 91-112 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Increases in weight, total body length, and width and length of the head capsule of Japanese beetle larvae were studied. Since the progression factors decreased with succeeding molts and exhibited considerable variation it was concluded that Przibram's principle is inapplicable. Cells were counted in the mid-intestine and brain. Columnar cells of the mid-intestine were measured. The data show: (a) No increase in cell number occurs at the time of molting. (b) The progression in weight and length cannot be correlated with an increase in cell number. In the first instar the progression for increase in weight was 5.73; while for increase in cell number, it was 1.67 for the mid-intestine, and 1.19 for the brain. In the second instar, the corresponding figures were 5.24, 1.98 and 1.69. In the third instar average weight increased 3.18 times, but there was practically no increase in cell number. Thus, molting does not represent a definite increase in number of cells of the insect's body as suggested by Przibram and Megusar, and Bodenheimer's method of calculating cell divisions seems to have no factual basis. Increase in size of the larva is largely due to an increase in cell size. The ratio of increase in total cell volume of the columnar cells of the mid-intestine is approximately equal to the ratio of weight increase.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050590105
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  • 6
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    The intergeneric homology of an atypical euchromosome in several closely related Acridinae (order orthoptera) (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 123-161 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: An atypical euchromosome, characterized by the large size and deep stainability of its chromomeres during the meiotic prophase, occurs in representatives of seven genera of Acridinae, viz., Chorthippus curtipennis, Euchorthippus pulvinatus, Stenobothrus lineatus, Omocestus ventralis, Stauroderus biguttulus, Gomphocerus rufus, and Aeropedellus clavatus. This element, which is termed the ‘megameric chromosome,’ stains more deeply than the other euchromosomes also during interkinesis and early spermiogenesis. The megameric chromosomes of the individual exhibit striking similarity in the number, size, and arrangement of their chromomeres through successive stages of the meiotic prophase. All the evidence from cytological study indicates that these chromosomes are intergenerically homologous. This is chiefly significant in the support it gives to the theory of chromosome individuality. The heteromorphic megameric tetrad of one individual of S. biguttulus - unequal because of a deficiency - usually undergoes segregation in the second division. The megameric chromosomes display splits previous to synapsis. Pairing begins at their proximal ends and proceeds distally. All the euchromosomes of the spermatid nucleus show splits in preparation for the first cleavage division of the zygote.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050590107
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  • 7
    Electronic Resource
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    Branchial glands in fishes (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 215-223 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: In a comparative study of the branchial epithelium of fishes we find the occurrence of three distinct types and seven subtypes of intra-epithelial glands which are in intimate association with the branchial epithelium of fishes.These glands have been classified according to their morphological patterns, cytoplasmic content and other features dealing with structural complexity.Although these structures arrange themselves in a graded series which become increasingly more and more complex, there does not appear to be any definite correlation between the structural complexity of the glands, and the apparent evolutionary history of the fishes.We conclude from the characteristic arrangement, relationships, and specific staining reactions that these structures are intra-epithelial mucous glands.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050590202
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  • 8
    Electronic Resource
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    Spermatophores of the snail Neritina reclivata (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 191-209 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Differing from hitherto known spermatophores, these are found to have the form of a loop with a thick body and the slender ends twisted together.Also one end bears a spiral row of triradiate spicules, unique in being chitinoid secretions. Each is formed within a vacuole of a cell of a small gland found in the males. The ends of the spermatophores hold sperms, but the main mass consists of granules of problematical value. Spermatophores after discharge are stored up within the female, where remnants of them remain indefinitely.For the first time stages in the formation of spermatophores were found within the males. The head organ in the male is found to be more complex than hitherto known in this genus. A special head organ in the female is described for the first time in this family. An hypothesis is advanced as to the possible use of these male and female head organs in transfer of spermatophores. The suggestion is made that in this family the spermatophores and their organs of transfer and of storage may serve as generic characters.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050600110
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  • 9
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    Cell division and differentiation in the growth of specialized vertebrate tissues (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 243-259 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The post-embryonic growth of the notochord, sensory retinal cells, cartilage and gut epithelium in frog tadpoles, trout and lamprey is described. Increase in the number of notochord and sensory retinal cells results only from the mitotic division of cells which have not yet undergone the structural modifications characteristic for these cells. The specialized and functional cell does not divide. In the frog tadpole the cartilage cells increase by mitotic division of the fully-formed and functional cell: in addition there are centers of proliferation consisting of small, rapidly-dividing cells. The trout is similar except that there are no centers of proliferation, in addition amitotic division occurs. The gut epithelium grows by mitotic division of the functional constituent cells. During division the cell assumes a spherical shape and its functional activities are suspended.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050600113
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  • 10
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    Erratum (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. i 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050600109
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  • 11
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    The development and metamorphosis of the mid-intestinal epithelium of Acanthoscelides obtectus (Say) (Coleoptera)The author is indebted to Prof. Wm. S. Marshall, University of Wisconsin, for helpful criticisms and suggestions throughout the course of this investigation. (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 221-241 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Two sizes of cells are found in the mid-gut epithelium of late embryos. The larger cells contain nuclei having twice the number of prochromosomes and nearly twice the volume as compared with the nuclei of the smaller cells. During each larval instar, the nuclei of the functional mid-gut epithelium nearly double their volume and there is a corresponding increase in the amount of chromatin. It is suggested that chromosome division without nuclear division occurs in these epithelial cells during the pre-ecdysial periods of each instar. The mid-intestinal epithelial cells and their nuclei undergo characteristic changes during the feeding and pre-ecdysial periods of each instar. Prochromosomes as well as cytoplasmic globules, which represent a cytoplasmic diminution process, are visible in the latter period. The regeneration cells which give rise to the pupal and mid-gut epithelia have origin from the small embryonic mid-gut cells and from nuclei and cytoplasm derived from the larval epithelium by means of an apparent ‘pseudoreduction’ of the large larval nuclei during the late third and fourth instars.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050600112
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  • 12
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    The bodies of Eberth as a source of connective tissue ground substance in Rana catesbiana, ShawThis study was aided by a grant from the National Research Council, Committee on Radiation. Grant administered by W. C. Curtis. (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 279-285 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The bodies of Eberth in the skins of tadpoles appear in young stages as fine threads and develop into heavy, amorphous masses in close contact with the basal membranes of the epidermal cells. They possess extensions which pass from the epidermal cells through their membranes into the corium. During metamorphosis, when the amount of dermal connective tissue is greatly increased, the bodies disappear the more distal first and the most proximal latest. The processes which pass into the dermis are the last parts to remain visible. Examination of a series of stages suggests that they pass through the cell membranes of the epidermis and into the corium. The bodies then, may be regarded as reserve accumulations of secreted material which are used up in the formation of dermal connective tissue. This explanation accounts for three otherwise unexplained peculiarities of the skin of the developing frog: (1) the presence and growth of the bodies of Eberth; (2) their disappearance during metamorphosis; (3) the sudden large increase in connective tissue fibers of the dermis at metamorphosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050600115
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  • 13
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    The origin of new epidermal cells in the skin of normal and x-rayed frogsThis investigation has been supported in part through grants made to W. C. Curtis from the Committee on Radiation of the National Research Council. (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 327-349 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The skins of normal and x-rayed tadpoles and frogs were compared. Almost no mitotic figures occurred after the tenth day of larval life. The number of mitoses and the length of the period during which mitosis occurred were reduced by x-rays in proportion to the exposure. Spindle-shaped cells were found on the vertical connective tissue fiber bundles which connect the lower layer of the dermis with the under side of the epidermis in adult frogs. After exposure to 4000 r the number of these cells, which are believed to be traveling up the vertical strands to join the epidermis, was doubled. New, uninjured cells appeared in the basal epidermal layer following this increase. Since no appreciable number of mitotic divisions and no amitotic divisions were found in the epidermis, either normally or during the regeneration following exposure to x-rays, these ‘traveling-cells’ are held to be an important source of replacement in correlation with normal desquamation as well as desquamation caused by the irradiation.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1050590206
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  • 14
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    The osteology and relationships of the phallostethid fishes (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 453-483 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Two genera of the Phallostethid fishes were anatomized using both the clearing and the dissection methods. While resembling Poecillids and agreeing with them in numerous anatomical features, these fish are true Acanthopterygians and apparently are correctly placed by Myers in the suborder Phallostethoidea erected for them in the order Percesoces. The two divergent types of priapia found in the group are readily derivable one from the other, corresponding bone for bone. The priapial bones can be homologized with the missing pelvic fins and girdle plus, perhaps, the post cleithrum and some of the pectoral pterygials. A comparison is made between the Phallostethid priapial skeleton and the highly modified girdle complex of the Polynemids.
    Additional Material: 1 Ill.
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    URL: http://dx.doi.org/10.1002/jmor.1050590304
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  • 15
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    Haploidy and aberrant spermatogenesis in a coleopteran, Micromalthus debilis LeConteSubmitted in partial fulfillment of the requirements of the degree of Doctor of Philosophy, in the Faculty of Pure Science, Columbia University. (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 485-515 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The coleopteran Micromalthus debilis LeConte has two additional female reproductive forms besides the male and female adults. One of these is a paedogenetic viviparous female which produces female offspring by diploid parthenogenesis; the other is a paedogenetic ovoviviparous female which produces males by haploid parthenogenesis; The male has been shown to be somatically haploid in both early and late stages of development, while all three female types are diploid. The first spermatocyte division is completely abortive as regards division of chromosomes and cell. However, a very characteristic unipolar spindle is regularly formed. The chromosomes of the first spermatocyte anaphase move away from the single pole with their attachment regions hindermost. The spindle consists of ten fibers, each one connecting a chromosome with a single pole. They elongate during the anaphase. The second spermatocyte division is apparently normal in all respects and it ultimately results in two normal sperm. It has been shown that the theories of Belar, Bleier and Schaede concerning the problem of chromosome movement are deficient in view of the peculiarities of this monocentric mitosis.
    Additional Material: 3 Ill.
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    URL: http://dx.doi.org/10.1002/jmor.1050590305
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  • 16
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    On the structure and function of the ascidian test (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 589-601 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The test consists of a clear matrix in which cells, fibrils, spicules and vascular tubes are embedded. It is supplied with two main blood vessels which ramify in the test substance and end in a large number of vascular ampullae near the outer surface of the test. Three different kinds of spicules are present. The test cells are of five different kinds. Besides these cells, the author has, for the first time in the history of our knowledge of the Tunicata, demonstrated the presence of nerve cells, nerve fibers and receptor cells in the test. The nerve cells are found throughout the test (except the foot) but are more numerous in the test of the siphons. The epithelial cells of the vascular ampullae act as receptor organs being supplied with nerve fibers that connect them with the nerve cells of the test. Receptor cells are also present in the regions of the test devoid of ampullae (except the foot). Stimuli are received by the receptor cells and conducted by nerve fibrils to the nerve cells, which are in turn connected with the nerve ganglion. The test, therefore, not only serves for the protection and attachment of the animal but also acts as a respiratory and receptor organ.
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    URL: http://dx.doi.org/10.1002/jmor.1050590308
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  • 17
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    The interkinetic migration of embryonic epithelial nuclei (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 1-11 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Nuclei of columnar epithelia of vertebrate embryos move to the free epithelial surface before a division, the movement of the nucleus accompanying a shortening of the columnar cell. After division at the free surface the daughter cells elongate, the nuclei passing away from the free surface. This is illustrated by drawings and measurements of cells of the fore-gut it of the garter snake embryo. The elongation of these cells after mitosis is associated with an elongation of the spindle fibers to produce a prominent cytoplasmic fiber which persists through the interkinetic stage and into the next mitosis. The appearance of nests of nuclei in mitosis is accounted for by the fact that descendants of an earlier cell have kept approximately in step in their divisions.
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    URL: http://dx.doi.org/10.1002/jmor.1050600102
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  • 18
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    Germ cell origin and spermatogenesis in the Siamese fighting fish, Betta splendensAcknowledgment is made of the writer's indebtedness to Dr. C. L. Turner for advice and assistance, to Dr. C. L. Hubbs and Dr. G. S. Myers for classifying the fish used in this investigation, and to Virginia Bennington for the drawings. (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 103-125 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Residual germ cells larger than primary spermatogonia but similar in other respects are found throughout the testis in the walls of the lobules and in the cysts of developing germ cells. There is no evidence for germ cell migration through the testis. Spermatogonia arise in situ from residual cells.Forty-two chromosomes are found in the spermatogonial cells. Two of these chromosomes are much larger than the others and possibly represent sex chromosomes. The haploid chromosome number as seen in primary spermatocyte cells is twenty-one. A large ovoid chromosome, considered to be a sex chromosome, lags during the formation of the primary spermatocyte spindle. It divides after the division of the other chromosomes into equal chromosomes which pass to opposite poles of the spindle.The evidence for sex chromosomes as presented here is meagre but is consistent with the evidence from chromosome studies in other teleosts. It has been proposed that sex chromosomes are in a nascent condition and hence are differentiated but little from autosomes and also that the members of the sex chromosome pair are morphologically alike.
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    URL: http://dx.doi.org/10.1002/jmor.1050600106
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  • 19
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    The cytology of the hypophysis cerebri of the batA thesis submitted from the Department of Zoölogy for the degree of Doctor of Philosophy at the University of Missouri. The work was supported in part by a grant from the Rockefeller Foundation administered by Prof. Mary J. Guthrie. (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 127-157 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: A cytological study of the hypophyses of more than 100 female bats, collected at fortnightly intervals from October to April, is reported. The bats were decapitated within 24 hours after collection. and then hypophyses fixed in Champy's fluid or Helly's fluid followed by staining by the acid fuchsin-thionin-aurantia method of Kull.The pars distalis, pars intermedia, and pars nervosa lie adjacent to one another in the flattened gland. In some hypophyses the lumen of the original buccal evagination persists as a narrow residual cleft which may be expanded to form ciliated vesicles.Observations on cell size. nucleoplasmie ratio, degree of chromaticity in the nucleus, staining reactions of the cytoplasm and secretory granules, and the presence of chondriosomes, secretory granules, and vesicles in the cytosome are recorded. Secretory cells and histiocytes are idintified. Sceretoty cells are found in successive stages of growth, differentiation, secretion, and degeneration. Cells which have discharged their secretion apparently do not resynthesize secretory granules. Mitosis is not observed. The available evidence suggests utilization of a large supply of embryonic cells as the source of the fully differentiated cells. The cells of the pars intermedia are interpreted as potential secretory cells which do not differentiate under the inadequate nutrient conditions of that region.
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    URL: http://dx.doi.org/10.1002/jmor.1050600107
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  • 20
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    The segmentation of the abdomen of Lipeurus heterographus Nitzsch (Mallophaga)Contribution from the Department of Entomology, New York State College of Agriculture, Cornell University, Ithaca, New York and the Department of Zoology, Tulane University of Louisana, New Orleans, Louisana. (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 211-219 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Eleven segments are recognized in a comparative study of the abdomens in immature and adult instars of Lipeurus heterographus Nitzsch.The abdomen of the first instar appears ten segmented but with the apparent first segment twice as long as any one of the others and with two transverse rows of hairs on the tergum while the other abdominal segments have but one. This indicates that the apparent first segment is the true first and second abdominal segments which have fused. The apparent tenth segment of the abdomen is the true eleventh segment. A fusion of the true ninth and tenth segments occurring in the third molt further reduces the number of segments to nine which is the apparent number of segments found in the adult.
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    Studies in teleostean reproduction. I. Embryonic hermaphroditism in Lebistes reticulatus (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 261-277 
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    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: A study has been made of 155 Lebistes embryos, extending from fertilization until birth of the young. A period of embryonic hermaphroditism begins soon after the formation of the genital ridges (3.0 mm.) and continues until birth (6.5 to 7.0 mm.). Development is first ovarian; evidence is the universal occurrence, in all gonads, of many germ cells in typical ovarian synapsis. The gonads of one-half of the embryos soon become testicular while those of the other half continue to develop as ovaries. In testicular gonads, all synaptic germ cells undergo pycnotic dissolution as the gonad hilus organizes into a prospective medulla. In ovaries, germ cells in synapsis continue to enlarge as definitive ovocytes. This embryonic hermaphroditism supports Witschi's explanation of sex determination in Lebistes, based on his own work on frogs and on Winge's discovery of unusual XX males in Lebistes. The embryology of gonads in Lebistes also suggests that in teleosts, as in amphibians, birds, and mammals, gonads develop from two distinct portions, a male medulla and a female cortex.
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    Phylogeny of the distal musculature of the pectoral appendage (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 287-315 
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    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The musculature of forearm and manus basically is divisible into dorsal matrix and ventral matrix of elbow, and dorsal matrix and ventral matrix of the podium. The former contributes to the present musculature of brachium and antibrachium, and the latter to the musculature of antibrachium and podium. The forearm muscles of the former category are divisible into humero-radial (carpi radialis), humero-podial (digitorum communis et sublimis), and humero-ulnar (carpi ulnaris) components. The deep muscles of the forearm (mm. abductor pollicis longus, extensor pollicis longus, extensor indicis proprius; flexores digitorum profundus et pollicis longus) have been derived from podial matrices that have migrated proximally along the ulna. The short flexors of the hand have been derived from a superficial and a deep basic series: From the former have come mm. palmaris brevis, abductor pollicis brevis, superficial head of the flexor pollicis brevis, abductor et flexor digiti 5, and lumbricales. From the deep series have been derived mm. contrahentes (including adductor pollicis), interossei, opponens pollicis, deep head of flexor pollicis brevis, and opponens digiti 5.
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    Nuclear reorganization processes in Paramecium aurelia, with descriptions of autogamy and ‘hemixis’ (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 11-67 
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    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: In a study of the nuclear behavior of Paramecium aurelia, a process of self-fertilization, autogamy, has been discovered and traced through its essential steps. Autogamy is the counterpart, in a single animal, of conjugation. In autogamy, three micronuclear divisions lead to the formation of the gametic nuclei. These divisions are considered to be maturation divisions. The first division is characterized by a great increase in the size of the two vegetative micronuclei and the occurrence of long thread-like crescents. The second division results in the formation of eight nuclei, variable numbers of which continue to divide giving rise to the potential gametic nuclei. Two of the latter unite to form a synkaryon. The old macronucleus disintegrates. The fusion nucleus divides twice: two of the daughter nuclei become macronuclear anlagen, while the other two remain micronuclei. The macronuclear anlagen are distributed to two daughter cells at the time of the first cell division, when the micronuclei divide.The macronuclear changes in hemixis can be classified into three main types: (1) the extrusion of a relatively small number of spherical chromatin fragments; (2) the splitting of the macronucleus into two (generally) large independent portions - accompanied, or not, by the extrusion of smaller spherical bodies; (3) the complete disorganization by fragmentation of the macronucleus.
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    The absorptive processes in the embryos of Parabrotula dentiens, a viviparous, deep-sea Brotulid fish (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 313-325 
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    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Parabrotula dentiens is a viviparous deep sea Brotulid fish. The embryos at the 6 mm. stage are held within the ovarian cavity as are the embryos of Zoarces, the Embiotocidae, the Goodeidae, the Jenynsiidae and the Anablepidae in the later stages. The embryos of Parabrotula dentiens are equipped with external processes which are attached around the anus and to the ventral wall of the embryo for a short distance in front of the anus. The processes have a spongy connective tissue stroma and are covered with a syncytial layer. It is assumed that the processes augment the body surface of the embryos and have a nutrition-absorbing and an oxygen-absorbing function.
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    The dorsal axial musculature of certain primitive permian tetrapods (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 265-311 
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    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The development of the dorsal axial musculature is traced from Eryops, through Diadectes, to Dimetrodon. lguana, a modern form, is used for comparison. The axial muscles of a primitive form, such as Eryops, were thick, fleshy, and metameric; those of more advanced types, such as Dimetrodon, were light, highly tendinous, and largely unsegmented. Diadectes represents an intermediate stage. The changes in the muscles and related changes in the axial skeleton are closelyassociated with the development of active, terrestrial animals.
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    The innervation of the muscle of accommodation in the eye of the teleost, Holocentrus (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 163-172 
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    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Serial sections and dissections of the eye and orbit of Holocentrus ascensionis (Osbeck) reveal a relatively well-developed accommodation muscle (m. retractor lentis or campanula Halleri) supplied by a ramus of the short ciliary nerve which traverses the region of the vitreous humor in an invaginated fold of choroid, the processus falciformis. The ramus contains chiefly heavily myelinated nerve fibers with a few finely myelinated or unmyelinated fibers. The type, origin and probable function of these constituents follows: 1.Medullated postganglionic processes of ciliary ganglion cells about which end the preganglionic fibers of the oculomotor nerve.2.Medullated postganglionic fibers from the trigeminal sympathetic ganglion which traverse the ciliary ganglion to join the nerve. These and (4) may supply accompanying blood vessels.3.Medullated sensory fibers to the profundus ganglion.4.Unmedullated or finely medullated fibers from the trigeminal sympathetic ganglion.
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    The effects of x-radiation on limb development and regeneration in Amblystoma (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 173-213 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The regeneration of the early fore limb bud of Amblystoma larvae has been prevented by exposure to x-radiation. Histological studies show that the failure to regenerate is due to a destruction of the undifferentiated mesenchyme cells which normally furnish the materials for regeneration. Data have also been gathered as to the minimal dosage of x-rays necessary to prevent the regeneration of the early limb bud.By properly governed radiations the development of unamputated limb buds can also be controlled; larvae with permanent two-, three- or four-digit limbs can be produced. The effect here is primarily on the differentiation processes of the limb. These limbs in which digit formation has been controlled by x-radiation also fail to regenerate if subsequently amputated. After amputation there is a complete dedifferentiation of all the formed structures of the limb stump. The dedifferentiated cells of the limb stump. The dedifferentiated cells of the limb stump regain their power of mitotic cell division 30 to 35 days after amputation, but are never able to differentiate into the components of a new limb. The primary effects of radiation in this case appears to be on cellular differentiation rather than on cellular proliferation.
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    Masthead (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936) 
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    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
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    URL: http://dx.doi.org/10.1002/jmor.1050590301
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    The anatomy and histology of the alimentary tract of the grasshopper, melanoplus differentialis ThomasContribution no. 7 from the laboratories of the Department of Biology, Temple University. (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 423-439 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Notes: This investigation is intended to be the first of a contemplated series to study correlation of diet with morphological change. The material here reported is from grasshoppers on satisfactory diets. The gross anatomy shows a typically acridine arrangement. Fixation with B3 and staining with haematoxylin and eosin shows that peritoneum, muscle and chitin in different areas vary only in arrangement and relative development. The epithelial cells of the various regions differ in structure as well. Modifications of the cytoplasmic elements of these cells are correlated with cellular activity. The epithelial cells of the mid-gut and its six bi-lobed gastric caeca, and of the six rectal glands have a striated border of separate filaments which are cilia-like in appearance but devoid of motion. The caeca are most active in gastric secretion, which is merocrine or holocrine according to conditions. Essentially different granules and vacuoles are secreted, and extruded by rupture of the cells; which are replaced from nidi.
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    The effect of fat extraction on Golgi bodies of kidney cells of the frog (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 441-451 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Frog kidney, when fixed in 4 per cent formalin and subsequently treated with Kolatchev solutions, is found to contain osmiophilic bodies which not only appear identical to the Golgi substance of Kolatchev fixed controls but which also resist bleaching in hydrogen peroxide or potassium permanganate solutions. If a formalin fixed kidney is dehydrated and extracted with various fat solvents and subsequently fixed with the Kolatchev technique, Golgi bodies are usually completely removed but occasionally cells are found which contain spherical globules of osmiophilic substance scattered through the cytoplasm.Kidney tissue fixed in a mixture of 95 parts of alcohol plus 5 parts of formalin before application of the Kolatchev solutions does not contain Golgi bodies. The same results are obtained if benzene is used instead of alcohol and formalin. Striated muscle, when treated in a similar manner, contains darkly stained (Z) and (M) membranes, therefore the osmophilic substance present in muscle quite widely daerent, chemically and physically from that contained in kidney cells.It is apparently an established fact that formalin preserves phospholipids in tissues nnd this investigation has shown that Golgi bodies in kidney cells can be demonstrated following fixation in formalin. Moreover, the Golgi bodies, which are preserved by formalin, can be removed by extracting the tissue with fat solvents. This evidence, therefore, strengthens the hypothesis that true Golgi substance is phospholipid in nature.
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    On the venous system of the common Indian rat-snake ptyas mucosus (Linn.) (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 517-547 
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    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The venous system of Ptyas mucosus (Linn.) presents the following features which appear to be hitherto undescribed in Ophidia: (1) Direct connection of the anterior azygos vein with the lateral cephalic vein just behind the head and also its anastomosis with either of the common jugular veins (right or left). (2) Anastomosis of the right and left common jugular veins with the epigastric vein in the neck region. (3) Left common jugular vein larger than the right. (4) Origin of the oviducal sinuses directly from the afferent renal veins and their termination on either side directly into the postcaval. (5) Persistence of the posterior cardinal veins in both the sexes. (6) Opening of most of the branches of the epigastric vein directly into the vena mesenterica in the liver region and of a few only into the right lobe of the liver. (7) Branches from the meso-rectum contributing to the formation of the vena mesenterica. (8) Opening of some veins into a branch of the epigastric vein lying just behind the heart, which carry blood from the dorsal surface of the right lung, trachea, pericardial wall, and also from the parietal layer of the body wall on the left side.
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    The cytological changes in the hypophysis cerebri of the garter snake (Thamnophis radix) following thyroidectomySubmitted to the Graduate School of the University of Wisconsin in partial fulfillment of the requirements for the degree of Doctor of Philosophy. (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 603-623 
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    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Changes in the hypophysis cerebri of the garter snake, Thamnophis radix radix Baird and Gerard, were found in the anterior lobe of the nineteen thyroidectomized animals reported. Chromophobic cells enlarge and acquire a basophilic granulation, to become apparently normal beta (basophilic) cells. These, along with the beta cells originally present, become vacuolated, lose their granular content, apparently by liquefaction of the granules, and finally degenerate. The hypophyses of animals kept at 90°F. after thyroidectomy do not show degeneration of beta cells to the same degree that glands from animals kept at 70°F. (approximately) do. A reduction in the number of alpha (oxyphilic) cells is found under all conditions. A brief description of the morphology and normal histology of the gland is included.
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    The myology of salamanders with particular reference to Dicamptodon ensatus (Eschscholtz). I. Muscles of the head (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 31-75 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: This paper is the first of a series of four describing the anatomy and development of the muscles of Dicamptodon ensatus (Ambystomidae) and comparing them in detail with those of other genera and families of Urodela. In the present paper the muscles of the eye, jaw and hyobranchial apparatus are included, with the exception of the few longitudinal throat muscles derived from trunk myotomes; the second paper will include those of the trunk and tail and their derivatives; the third, those of the limbs and the fourth, a discussion of developmental principles in myology and the bearing of muscles upon classification and phylogeny in the salamanders. The correlation of data on various larval, perennibranchiate and adult forms reduces many muscle names to synonymy, and simplifies the understanding of certain difficult parts of the anatomy. Less attention is given to innervation than to developmental changes and the derivation of the muscles. Dicamptodon, in the larval stage, typifies other larval and most perennibranchiate forms, at metamorphosis it shows the most generalized methods of muscular and skeletal transformation, and when adult the animal serves as a landmark for recognizing the directions of evolution among other Urodela.
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    Embryology of the nervous system in the grasshopper, Melanoplus differentialis (Acrididae; Orthoptera) (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 159-187 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The development of the nervous system is traced by stages and, in general, is found similar to that already described for other insects. Terms such as ganglionic gangliomeres, medullary masses, optic nerve, etc., are shown to have no significance. The intraganglionic thickening of Viallanes is shown to be a misnomer. A chronological table of the developmental processes is appended.
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    The phenomena of anuran metamorphosis. III. The development of the thyroid gland (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 69-89 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: This paper presents a study of the growth and histological development of the thyroid in three species of frogs, the small Pseudacris triseriata, the large Rana catesbeiana and the intermediate Rana palustris. It was found that the history of the gland in relation to metamorphosis is essentially the same in all. Previous to metamorphosis the gland is small, and the cells very poor in cytoplasm. At the beginning of metamorphosis (i.e., rapid hind leg growth) the thyroid shows a marked acceleration of growth and activity, which continues and reaches a peak at the time of the emergence of the front legs. Late in metamorphosis a regression occurs.The conclusion is drawn that there is a rising concentration of thyroid hormone during the course of metamorphosis. The author has previously shown that such a rising concentration will induce the normal pattern as to sequence and time spacing of metamorphic events.The beginning of metamorphosis is conceived as dependent upon the time of stimulation of the thyroid and the pattern of its subsequent continuance as dependent upon the pattern of response of this gland.
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    Histological changes accompanying the growth of the mid-intestine of Japanese beetle larvae (Popillia japonica Newman) (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 113-122 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: A study was made of the changes in the mid-intestinal epithelium accompanying the growth of first and scond instar Japanese beetle larvae. The columnar cells were counted and measured in the region limited by the second and third rings of gastric caeca.During the first 4 days of each instar (at 25°C.), there is no increase in the number of columnar cells, growth being due entirely to an increase in the size of cells already present. The number of columnar cells begins to increase about the fifth day of each instar and continues to increase until the larva prepares for the succeeding molt. New columnar cells are produced by divisions of the basal or interstitial cells and their transformation into columnar cells. The new cells become elongated and push between adjacent columnar cells. They continue to grow until they have reached the size of columnar cells already present. Cell multiplication and differentiation occur simultaneously, and most rapidly near the end of each instar.
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    Masthead (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936) 
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    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
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    URL: http://dx.doi.org/10.1002/jmor.1050590201
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    Studies of Endamoeba blattae (Bütschli) (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 225-263 
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    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: A detailed study of the life history and cytology of Endamoeba blattae (Bütschli, 1878) has confirmed many of the findings of earlier workers and added to the knowledge of the processes of mitosis, excystation, metacystic and later development of this animal.Metacystic transformation has been seen to give rise to a form indistinguishable from E. thomsoni Lucas ('27). The number of chromosomes found in dividing stages of this trophozoite appears to be half that found in the large adults and indicates the possibility of a gametogenic type of reproduction differing from that described by Mercier ('10).Upon the basis of these findings and of a reclassification of the nuclear types found among the larger endozoic amoebae, it is proposed to erect, within the genus Endamoeba Leidy (1879), three sub-genera to serve until further knowledge permits a more permanent arrangement, as follows: Genus Endamoeba Leidy (1879). Type - E. blattae (Bütschli, 1878). Sub-genus Endamoeba. Type - E. (E.) blattae (Bütschli, 1878). Sub-genus Placoidia. Type - E. (P.) minchini Mackinnon ('14). Sub-genus Poneramoeba. Type - E. (P.) histolytica Schaudinn ('03).
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    The metamorphosis of Drosophila melanogaster, including an accurately timed account of the principal morphological changes (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 351-399 
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    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: During the quiescent fourth larval instar the larva of Drosophila becomes loosened from the puparium and takes on the form of a pupa. A large gas bubble is formed within the body during this prepupal period. At the end of this stadium, which lasts 11 1/2 hours at 25°C., it pupates, shedding the prepupal cuticle. The gas bubble is used as a mechanism to separate the cuticie from its hypodermis. Practically all of the tissues undergo histolysis and are replaced by imaginal structures derived from specialized cells. Some of the muscles persist longer than the general mass and perform special functions in the pupa. The sequence of histolytic and histogenetic changes is accurately timed at a constant temperature.
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    Oögenesis, fertilization and early cleavage in HabrobraconThis investigation was aided by the Committee on Effects of Radiation on Living Organisms (National Research Council) and by the Elizabeth Thompson Science Fund through grants to Dr. P. W. Whiting for technical assistance and microscopical equipment, and by the Rockefeller Foundation through a grant to the Department of Biology, Amherst College. (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 401-421 
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    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Since differential maturation has been used in explaining sex determination in Hymenoptera, the pertinent stages were studied cytologically in Habrobracon by using whole mounts of timed eggs stained by the Feulgen reaction.The egg is laid with the maturation figure in an arrested first anaphase close to the ventral egg surface, and with the spindle horizontal to the latter. Eggs from different stocks show differences in position of maturation figure. A single sperm enters during oviposition, the maturation spindle revolves to a vertical position and normal maturation and change of the sperm ensues. Nuclei of unfertilized eggs behave similarly. Ten chromosomes enter each of the three polar and the one matured egg nuclei, the latter being always the innermost of the four. Unfertilized eggs have ten chromosomes at first and eleventh cleavages; fertilized eggs have around the expected twenty. Chromosomes in maturation divisions are too small and round to show individual differences. There is no good evidence of chromosome elimination.
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    The jaw musculature of the phytosaur, machaeroprosopus (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 59 (1936), S. 549-587 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The phytosaur of the Triassic exhibits many interesting adaptive modifications of the diapsid skull. The modifications of the muscle attachment areas for the jaw muscles have been examined in comparison with the musculature of the recent forms Sphenodon and Alligator. It has been determined that the development of the fleshy anterior pterygoid and of the intramandibular muscles is an adaptation concomitant with the elongation of the snout. The modification of the temporal region in the phytosaur with the posterior extension of the squamosal is also seen to be an adaptation to gain speed in closing the great mouth. The forward position of the head-neck joint would appear to gain advantage in the support of the heavy head. Such similarities as are seen between the phytosaur and the crocodilian may be accounted for as parallel adaptation.
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    Masthead (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936) 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    The behavior of the karyosome and the ‘peripheral chromatin’ during mitosis and interkinesis in Amoeba proteus with particular reference to the morphologic distribution of nucleic acid as indicated by the Feulgen reaction (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 13-29 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: A comparison of preparations stained with Weigert's haematoxylin and with Feulgen's stain shows that contrary to the commonly accepted view the granules of chromatin (sic.) that lie in interkinesis just beneath the nuclear membrane play no part in the formation of the chromatin of the equatorial plate, but break down during the prophase. They contain at best merely traces of nucleic acid. It is possible that these peripheral granules give rise to, or contribute to, the formation of the spindle fibers and the pole caps. The chromatin granules of the plate arise entirely from the karyosome.
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    Studies on the comparative histology of the digestive tube of certain teleost fishes. III. A bottom-feeding fish, the sea robin (Prionotus carolinus)Studies from the Department of Zoölogy, University of Nebraska, no. 186. (1936)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 60 (1936), S. 77-102 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: This paper presents the third of a series on comparative microscopic anatomy of the entodermal tract of certain teleost fishes, selected for their feeding habits: A study of the histology of the digestive tube of a bottom-feeding species, the Carolina sea robin (Prionotus carolinus (L.)). Mainly from study of sections, but dissections of both fresh and preserved material were employed to furnish the necessary background of gross anatomy. A short résumé of the literature is given. Treats the general histology of the different divisions of the tube, the tunics and tissues present, and findings on structure and arrangement of cells. Particular emphasis is placed on histological adaptations to meet the demands of physiological processes. Escphagus, stomach, intestine and pyloric caeca are given detailed treatment. The tunica mucosa, with its histological constituents and their arrangement, receives particular stress, being considered in relation to various phases of digestion and absorption. Particular consideration is given to the following: Effects of amount of food present in the tube on extent of mucosal folding; histological transitions from one region of the tract to another, particularly as regards epithelia; histology of peptic glands in cardiac division of stomach; origin and development of mucosal goblet cells; comparisons between the histology of the pyloric caeca and that of the adjacent intestine from which they arise, together with a detailed account of the histology of the former.
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    Gastric secretion in the groundhog (Marmota monax) during hibernation (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 201-211 
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    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
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    Comparative physiology in high altitudes (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 301-313 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Respiration of embryo versus egg (Orthoptera)Aided by grant from the Rockefeller Foundation for work on cellular physiology. (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 357-366 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Osmotic properties of the erythrocyte. VIII. On the nature of temperature on osmotic hemolysis (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 403-417 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Oxygen consumption and recovery heat production in muscles treated with brom- and iodoacetate (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 479-491 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    The basis of the principle of the master reaction in biology (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 9 (1936), S. 1-14 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Effects of a given x-ray dose on cysts of Colpoda steini at successive stages of their induced excystment (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 9 (1936), S. 105-116 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Delayed heat production of caffeinized frog muscles (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 89-99 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Masthead (1936)
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    Journal of Cellular and Comparative Physiology 8 (1936) 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Amoeboid movement at high hydrostatic pressure (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 167-178 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    The oxidative metabolism of the colorless alga, Prototheca zopfii (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 231-250 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    The initial swelling of excised muscle in fluid media (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 277-287 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    The isometric contraction of isolated muscle fibers (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 315-328 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    The effects of mechanical agitation on the relative viscosity of Amoeba protoplasm (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 329-345 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Masthead (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936) 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Masthead (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 9 (1936) 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Diffraction patterns of the frog sartorius and sarcomere behavior under stretch (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 9 (1936), S. 37-54 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Optical properties of the red cell membrane (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 9 (1936), S. 89-92 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Lactic acid in dogfish nerve (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 9 (1936), S. 137-147 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Masthead (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936) 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Studies in population physiology. V. The oxygen consumption of the flour beetle, tribolium confusum duvalThe author acknowledges with pleasure his indebtedness to Prof. Raymond Pearl, for reading the manuscript; to Prof. W. C. Allee, for certain suggestions; to Prof. J. H. Bodine, for technical advice about the Krogh manometer, and to Mr. Lewis Fleming, for the construction of an efficient constant temperature water bath. (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 313-323 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    On the period of susceptibility in the egg of Fucus furcatus when polarity is induced by brief exposure to directed white light (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 417-424 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    The effect of ultracentrifuging on the respiratory activity of developing and blocked embryonic cells (Orthoptera)Aided by grant from the Rockefeller Foundation for work on cellular physiology. (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 455-463 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    The chemotactic reaction of leucocytes to foreign substances in tissue culture (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 1-19 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Hemoglobin function during the life history of the bullfrog (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 63-81 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    The distribution of penetrating ammonium salts between cells and their surroundings (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 351-365 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    The effect of ethyl urethane on bacterial respiration and luminescence (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 409-415 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    The influence of certain external factors on the spiral growth of single plant cells in relation to protoplasmic streaming (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 445-454 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Masthead (1936)
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    Journal of Cellular and Comparative Physiology 8 (1936) 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    The influence of ultraviolet irradiation on frog and Limulus hearts subjected to potassium excess (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 37-40 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    A method for recording chromatophore pulsations in isolated fish scales by means of a photoelectric cell (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 83-87 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    Studies on the kinetics of cell respiration. II. Parallelism between the rate of oxygen consumption by Saccharomyces Wanching and the change in optical rotation of glucose in boric acid buffers (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 109-115 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
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    The viscosity of Amoeba at high hydrostatic pressure (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 159-165 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    The effect of rapid compression upon events in the isometric contraction of skeletal muscle (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 141-157 
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    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Enzymes in ontogenesis (Orthoptera). II. The indophenol oxidaseAided by a grant from the Rockefeller Foundation for research in cellular physiology. (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 213-230 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Masthead (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936) 
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    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Twitch tension and initial heat in caffeinized frog muscle (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 387-401 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
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    The energy changes of smooth muscle during relaxation (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 419-438 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    The origin of spiral growth in Phycomyces (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 493-502 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    The effect of lack of oxygen on cell permeabilityPresented in partial fulfillment of the requirements for the degree of Doctor of Philosophy. (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 9 (1936), S. 15-27 
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    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Determination of the respiratory quotient in marine animals (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 9 (1936), S. 77-87 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Differential permeability to water and osmotic exchanges in the marine worm Phascolosoma (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 9 (1936), S. 117-135 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Studies on the kinetics of cell respiration. IV. Oxidation reduction potentials of Chlorella suspensions in light and in darkness (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 9 (1936), S. 149-163 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    The relation of nerves to chromatophore pulsations (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 325-331 
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    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
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    The permeability of red blood corpuscles to organic anions (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 367-391 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Electrical conductivity of yolk, albumen, allantoic and amniotic fluids of the developing birds' eggs (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 425-431 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Studies on the kinetics of cell respiration. I. The rate of oxygen consumption by Saccharomyces wanching as a function of pH (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 475-493 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    URL: http://dx.doi.org/10.1002/jcp.1030070315
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    The tension at the surface of macrophages (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 21-30 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Temporal and spatial summation of extrinsic impulses with the intrinsic activity of the cortex (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 41-62 
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    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Studies on the kinetics of cell respiration. II. The effect of ultraviolet light on the rate of oxygen consumption by Saccharomyces Wanching (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 117-123 
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    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Chemical studies on bioluminescence. III. The reversible reaction of cypridina luciferin with oxidizing agents and its relations to the luminescent reaction (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 8 (1936), S. 261-276 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    The role of tissue spaces in the osmotic equilibrium of frog muscles in hypotonic and hypertonic solutions (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 9 (1936), S. 93-103 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Further studies on the permeability of the egg of Arbacia punctulata to certain solutes and to water (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 333-350 
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    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
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    Some properties of lipoid films in relation to the structure of the plasma membrane (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 393-408 
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    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
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    URL: http://dx.doi.org/10.1002/jcp.1030070307
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    Phosphocreatine and lactic acid changes in potassium chloride contracture of frog muscles in acid solutions (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 433-443 
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    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
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    URL: http://dx.doi.org/10.1002/jcp.1030070311
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    The composition of urine in the sealA preliminary report on this work has been made in the bulletin of the Mount Desert Island Biological Laboratory, 1935. (1936)
    Philadelphia : Wiley-Blackwell
    Journal of Cellular and Comparative Physiology 7 (1936), S. 465-474 
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    ISSN: 0095-9898
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
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    URL: http://dx.doi.org/10.1002/jcp.1030070314
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