منابع مشابه
Ontogeny of pituitary thyrotrophs and regulation by endogenous thyroid hormone feedback in the chick embryo.
Increased thyroid hormone production is essential for hatching of the chick and for the increased metabolism necessary for posthatch endothermic life. However, little is known about the ontogeny and distribution of pituitary thyrotrophs during this period or whether pituitary thyroid-stimulating hormone (TSH) production is regulated by endogenous thyroid hormones during chick embryonic developm...
متن کاملHepatic monoacylglycerol acyltransferase: ontogeny and characterization of an activity associated with the chick embryo.
Hepatic monoacylglycerol acyltransferase is expressed during the perinatal period in rats and guinea pigs and appears to be related temporally to the availability of fatty acids and to the development of hepatic steatosis. In order to determine when monoacylglycerol acyltransferase activity is expressed in an avian species, its ontogeny was investigated in chick liver total particulate preparat...
متن کاملThe Developing Chick Embryo
The RNA-P and DNA-P content of the nucleus and the RNA-P content of the whole cell of the livers of 8to 20-day chick embryos and of adult fowls have been determined. The DNA-P content of the liver nuclei was slightly higher in the 8and 10-day embryo than in all the other stages examined. A significant decrease in the RNA content of the cell occurred during embryonic development. The RNA content...
متن کاملNeural crest ontogeny during secondary neurulation: a gene expression pattern study in the chick embryo.
In the prospective lumbo-sacral region of the chick embryo, neurulation is achieved by cavitation of the medullary cord, a process called secondary neurulation. Neural crest cells (NCC) are generated in this region and they give rise to the same types of derivatives as in more rostral parts of the trunk where neurulation occurs by dorsal fusion of the neural plate borders (primary neurulation)....
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ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 1962
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.48.9.1582