Results 161 to 170 of about 38,109 (207)

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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Early development of the chick embryo

Journal of Morphology, 1993
AbstractThe ultrastructure of the early chick embryo was investigated, using scanning (SEM) and transmission electron microscopy (TEM). Eggs were obtained from the shell gland by injecting hens intravenously with a synthetic prostaglandin or arginine vasopressin.
J M, Watt, J N, Petitte, R J, Etches
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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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Teratogenicity of metals to chick embryos

Journal of Toxicology and Environmental Health, 1990
The present study examines the effects of heavy metals on chick embryogenesis. The metals included were cadmium, arsenic, cobalt, copper, indium, iron, manganese, and molybdenum. Salts of each of the metals were dissolved in saline and injected into the air sacs on d 2 of incubation. Dose levels varied with the metal to be tested.
S H, Gilani, Y, Alibhai
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Glycosaminoglycans in early chick embryo

The International Journal of Developmental Biology, 2003
The developmental profile of glycosaminoglycans (GAGs) were examined by cellulose acetate electrophoresis and high performance liquid chromatography in the early chick embryo from late blastula (stage XIII+) to early somite developmental stages (stage HH7-9). Sulphated GAGs were present from the earliest stages.
Spyros S, Skandalis, Achilleas D, Theocharis, Nikoletta, Papageorgakopoulou, Nikolas, Zagris   +3 more
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Amniotic Inoculation of Chick Embryos

Nature, 1946
THE respiratory tract of the developing chick embryo is susceptible to infection with various bacteria and the viruses of influenza, psittacosis, herpes and certain other infections of man and animals. This infection of the respiratory system is secured most readily by an inoculation of the virus directly into the amniotic cavity.
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Cultivation of Helminths in Chick Embryos

1991
A total of 23 species from 14 families of the Digenea have been studied in chick embryos, mainly on the chick chorioallantoic membrane (CAM). Most species for which cultivation has produced ovigerous adults in chick embryos have been avian digeneans with progenetic metacercariae.
B, Fried, L T, Stableford
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Endpoints in the development of chick embryos

Toxicology in Vitro, 1993
Although the use of mammalian embryos must remain the ideal for most teratological studies, non-mammalian embryos offer certain advantages. Their independence from the mother makes it possible to study the effects of reagents directly on the embryo without having to take possible placental effects into consideration, and it enables manipulations to be ...
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Microangiography in explanted chick embryos

Microvascular Research, 1981
Abstract A new method is described for explanation, vital microscopy, and microangiography with FITC-dextran injection in 43- to 76-hr embryos. The method has proved useful to visualize the embryonic microvasculature from precirculatory stages to beginning of the fourth day.
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