Results 211 to 220 of about 236,944 (258)

The Development of Somites in the Chick Embryo

Development, 1963
ABSTRACTIn two groups of experiments the so-called ‘somite centres ‘were removed from chick blastoderms. Nevertheless, well-developed somites formed. It is concluded, therefore, that the ‘somite centres’ are not essential for somite formation. The same experiments, and others which are described, also provided evidence that somites can form in the ...
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Erythropoiesis in the developing chick embryo

Developmental Biology, 1973
Abstract The types of erythroid cells of chick embryos developing in ovo have been correlated with the hemoglobins of the embryos. Prior to 5 days, when primitive cells constitute the only erythroid cells, two hemoglobins can be resolved by polyacrylamide gel electrophoresis.
G A, Bruns, V M, Ingram
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RADIOIODINE METABOLISM IN THE CHICK EMBRYO

Endocrinology, 1953
Many studies have been made of the histology of the thyroid gland at various stages in the development of the chick embryo. These studies, as well as several to detsrmine the age of the chick embryo at which biochemical differentiation or thyroid function begins, have recently been summarized by Moore (1950).
S H, WOLLMAN, E, ZWILLING
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Allograft reactivity in chick embryos

Journal of Experimental Zoology, 1971
AbstractKinetic studies with the splenomegaly assay and the in vivo antibody assay of marker allogeneic immunocompetent cells were made to ascertain when in embryonic development the capacity to actively reject foreign cells is manifested by the chick embryo.
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Induction of gastrulation in the chick embryo

Developmental Genetics, 1987
AbstractInteraction between the epiblast and the primary hypoblast in chick blastula results in induction of the primitive streak (PS) in the epiblast. Alpha‐amanitin, a specific inhibitor of poly A‐containing RNA synthesis, inhibits formation of the definitive PS.
N, Zagris, D, Matthopoulos
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Oxidative Phosphorylation in the Chick Embryo

Nature, 1959
SYNTHESIS of high-energy phosphate bonds was measured by the estimation of phosphorus: oxygen ratios. The materials used were 7–9 day old chick embryos of a hybrid White Leghorn ♀ × New Hampshire Red ♂. Except for the step isocitrate→ succinate, the estimations were done on the mitochondrial fraction, prepared according to the method of Hogeboom and ...
W W, NOWINSKI, W C, MAHAFFEY
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Assay of Corticosteroids in the Chick Embryo

Nature, 1960
FOR some time we have been studying various manifestations of the reaction induced in chick embryos by the inoculation of leucocytes from normal fowls (the Simonsen phenomenon) with special interest in the production of macroscopic foci on the chorioallantois1.
F M, BURNET, N L, WARNER
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Gonadal Growth in Chick Embryos

Nature New Biology, 1971
During ovarian differentiation of bird embryos, ovaries grow faster than testes. The difference for mammals may reflect the sex chromosome constitution.
U, Mittwoch, T L, Narayanan, J D, Delhanty, C A, Smith   +3 more
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Toxicity of metals to chick embryos

Bulletin of Environmental Contamination and Toxicology, 1976
A comparative index to the embryopathic effects of a number of metals which may appear as trace contaminants in avian food sources is given. Chicken eggs (White Plymouth Rock strain) were treated by yolk injection with sodium arsenite, sodium selenate and chloride salts of cadmium, lead, mercury, methyl mercury and zinc immediately prior to incubation.
W J, Birge, O W, Roberts
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The Development of the Notochord in Chick Embryos

Development, 1962
ABSTRACTThe literature on the notochord, a structure characteristic of all vertebrates, is very extensive, due to the phylogenetic importance of this organ, its role in early embryonic development, and its central position in the developing vertebral column. As early as 1834 the notochord tissue was described by Müller as being similar in appearance to
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