Results 151 to 160 of about 38,109 (207)

Cleavage in the chick embryo

Development, 1978
ABSTRACT Chick embryos ranging from the stage of first cleavage to that of about 700 cells were removed from the oviduct and examined by transmission electron microscopy. Beneath the cell membrane is a yolk-free cortical region containing microfilaments.
R, Bellairs, F W, Lorenz, T, Dunlap
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Neuraminidase in tissues of the chick embryo and chick

Biochimica et Biophysica Acta, 1963
Abstract 1. 1. The neuraminidase (N-acetylneuraminate glycohydrolase, EC 3.2.1.18) activity of subcellular fractions obtained from chorioallantoic membrane of chick embryos was determined. More than 90% of the activity was found in a supernatant fraction. 2. 2.
B, COOK, G L, ADA
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The multiple hemoglobins of the chick embryo

Journal of Cellular Physiology, 1972
AbstractTwo embryonic hemoglobins are found in chick erythrocytes during early development by column chromatography on DEAE‐cellulose and by electrophoresis on starch gel and gelatinized cellulose acetate. Beginning during the sixth day of incubation these are replaced by three different hemoglobins.
R, Fraser   +3 more
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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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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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Ventilatory chemosensitivity in the chick embryo

Respiratory Physiology & Neurobiology, 2003
In the externally pipped chicken embryo, oxygen consumption through the chorioallantoic membrane (VO2CAM) ranged between 2 and 55% (mean approximately 24%) of that through the lungs (VO2lung). Hypercapnia (5'-10' of 2, 5, or 8% CO2) or mild hypoxia (15% O2) had minor effects on VO2, whereas moderate or severe hypoxia (10-5% O2) caused large drops of ...
Tara M, Menna, Jacopo P, Mortola
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Nucleoside phosphotransferase of chick embryo

Molecular and Cellular Biochemistry, 1979
This paper describes a purification procedure and some properties of a nonspecific nucleoside phosphotransferase of chick embryo, an activity which catalyzes the transfer of chick embryo, an activity which catalyzes the transfer of the phosphate ester from a deoxyribonucleotide or a pyrimidine ribonucleotide to a deoxyribonucleoside acceptor.
G, Tesoriere   +3 more
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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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