Journal of Morphology

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Quantitative assay of electromyograms during mastication in domestic cats (Felis catus)
Journal of Morphology - Tập 163 Số 3 - Trang 253-281 - 1980
Gerard C. Gorniak, Carl Gans
AbstractMastication has been studied by cinematography with synchronized electromyography (computer quantified and analyzed), while unanesthetized, freely feeding cats (Felis catus) were reducing equivalent‐sized chunks of raw and cooked beef and cooked chicken. Cats reduce food on one side at a time, and their chewing cycles show both ho...... hiện toàn bộ
Ultrastructural observations on oogenesis in Drosophila
Journal of Morphology - Tập 137 Số 1 - Trang 29-48 - 1972
Anthony P. Mahowald
AbstractThe ultrastructure of the follicle cells and oocyte periplasm is described during the stages of oogenesis immediately prior to, during, and immediately subsequent to, vitellogenesis. A number of features have not been described previously in Drosophila. Some yolk appears prior to pinocytosis of blood proteins. However, most of the...... hiện toàn bộ
Differential scaling of the long bones in the terrestrial carnivora and other mammals
Journal of Morphology - Tập 204 Số 2 - Trang 157-169 - 1990
John E. A. Bertram, Andrew A. Biewener
AbstractWe measured the lengths and diameters of four long bones from 118 terrestrial carnivoran species using museum specimens. Though intrafamilial regressions scaled linearly, nearly all intraordinal regressions scaled non‐linearly. The observed non‐linear scaling of bone dimensions within this order results from a systematic decrease in intrafamilial allometric...... hiện toàn bộ
Head structures of Priacma serrata leconte (coleptera, archostemata) inferred from X‐ray tomography
Journal of Morphology - Tập 252 Số 3 - Trang 298-314 - 2002
Thomas Hörnschemeyer, Rolf G. Beutel, Freek Pasop
AbstractInternal and external features of the head of Priacma serrata were studied with X‐ray microtomography and with histological methods. The comparison of both techniques shows that X‐ray tomography is a promising new technique for the investigation of insect anatomy. The still somewhat coarse resolution of the X‐ray data is compensat...... hiện toàn bộ
An autoradiographic study of RNA synthesis in isolated salivary glands of Drosophila hydei. I. Autoradiographic studies
Journal of Morphology - Tập 116 Số 1 - Trang 65-87 - 1965
Gail Ferstandig Arnold
AbstractRNA synthesis in isolated Drosophila salivary glands was studied by autoradiography. The dry mass of cellular structures was determined by interference microscopy; a correction which compensates for self‐absorption of β‐particles, and consequent lowered grain counts, is discussed. The correction factors are 12.0 for nucleolus, 5.0...... hiện toàn bộ
Oogenesis in Xenopus laevis (Daudin). I. Stages of oocyte development in laboratory maintained animals
Journal of Morphology - Tập 136 Số 2 - Trang 153-179 - 1972
James N. Dumont
AbstractOogenesis in the anuran Xenopus laevis can be divided into six stages based on the anatomy of the developing oocyte. Stage I consists of small (50 to 100 μ) colorless oocytes whose cytoplasm is transparent. Their large nuclei and mitochondrial masses are clearly visible in the intact oocyte. Stage II oocytes range up to 450 μ in d...... hiện toàn bộ
Patterns of covariation in the masticatory apparatus of hystricognathous rodents: Implications for evolution and diversification
Journal of Morphology - Tập 273 Số 12 - Trang 1319-1337 - 2012
Lionel Hautier, Renaud Lebrun, Philip G. Cox
AbstractThe mammalian masticatory apparatus is a highly plastic region of the skull. In this study, a quantification of shape variation, the separation of phylogeny from ecology in the genesis of shape brings new insights on the relationships between morphological changes in the cranium, mandible, and muscle architecture. Our study focuses on the Ctenohystrica, a c...... hiện toàn bộ
The history of the germ cells in the viviparous teleost platypoecilus maculatus
Journal of Morphology - Tập 52 Số 1 - Trang 115-153 - 1931
Louis Wolf
AbstractThis study is based upon a series of ontogenetic stages from just before coelom formation to maturity.Primordial germ ceils are first seen at the outer edge of the lateral mesoderm and are traced from there to a position in the genital analagen. Counts indicate that most of them succeed in reaching the genital anlagen, where they from defin...... hiện toàn bộ
Segregation of the germ‐cells of the Teleost, Lophius
Journal of Morphology - Tập 21 Số 4 - Trang 563-611 - 1910
Gideon S. Dodds
On the precocious segregation of the sex‐cells in Micrometrus aggregatus, gibbons
Journal of Morphology - Tập 5 Số 3 - Trang 481-492 - 1891
Carl H. Eigenmann
Tổng số: 74   
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