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Comparative kinetics of embryo development
Bulletin of Mathematical Biology, 1993A model of embryo energetics was fitted to data from the literature for species as different as snails and mammals. The model is based on assumptions about energy uptake, storage and utilization. It describes the animal by two state variables: volume and energy storage. Embryo weight is taken to be proportional to volume, yolk weight to energy storage,
Zonneveld, C., Kooijman, S. A. L. M.
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Embryo development in dairy cattle
Theriogenology, 2016During the past 50 years, the fertility of high-producing lactating dairy cows has decreased, associated with intensive selection for increased milk production. The physiological and metabolic changes associated with high milk production, including decreased (glucose, insulin, IGF-I) or increased (nonesterified fatty acids, ketone bodies ...
Pat Lonergan +3 more
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The myosin of developing chick embryo
Archives of Biochemistry and Biophysics, 1969Abstract Two components were present in myosin preparations from the early stage of chick embryo. The sedimentation coefficient ( s 20, w 0 ) were 3.4 and 6.7, respectively. The two components were separated with ammonium sulfate. Both components had ATPase activity of myosin type as rabbit myosin. The specific ATPase activity of the 6S component
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The Early Development of Human Embryos
Journal of Medicine and Philosophy, 1985The development of the human embryo from the time of fertilization through the eighth post-fertilization week is described for medical policy purposes. During pre-implantation stages, differentiation occurs between precursors of embryonic and extra-embryonic structures. During implantation formation of a fore-hind axis begins within the inner cell mass.
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Mechanisms of plant embryo development
20001. Evolution in plants has favored both a simpler body plan with fewer cell types and the epigenetic flexibility to regenerate, via growth, dedifferentiation, and redifferentiation, to recover from environmental insults. It has become increasingly apparent that a plant cell uses external signals to differentiate and to maintain or to change the ...
S, Bai, L, Chen, M A, Yund, Z R, Sung
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Rhombomere development in a reptilian embryo
The Journal of Comparative Neurology, 1999Rhombomere development was investigated in a reptile, Alligator mississippiensis, using a variety of methodologies: cytoarchitecture (cresyl violet), histochemistry (peanut agglutinin), immunocytochemistry (antibodies to acetylated tubulin, vimentin, calretinin, and acetylcholinesterase), and external and internal morphology of wholemount embryos ...
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Vitamin A in Development of the Embryo
The American Journal of Clinical Nutrition, 1969openaire +2 more sources