Results 271 to 280 of about 773,120 (317)
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Proto-oncogenes and embryonic development

Biochimie, 1988
The role of proto-oncogenes in embryonic development was investigated using one of the most characterized vertebrates, the amphibian Xenopus laevis. Genes which belong to the major proto-oncogene families have been detected in Xenopus genome. The developmental control of the myc gene was assayed using a characterized Xenopus myc probe and specific ...
Marcel Méchali   +10 more
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Early mammalian embryonic development

American Journal of Industrial Medicine, 1983
This report examines the major events occurring during the first month of development in the human embryo. Developmental events are detailed, beginning with cleavage of the zygote and ending with the formation of the three primary germ layers. Certain aspects of early human development are compared with that in lower forms of vertebrates to emphasize ...
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Gravity and Embryonic Development

1976
The relationship between the developing embryo (both plant and animal) and a gravitational field has long been contemplated. The difficulty in designing critical experiments on the surface of the earth because of its background of 1 g, has been an obstacle to a resolution of the problem.
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Embryonic and post-embryonic development

1981
The modern era of insect developmental study began almost a century ago with the outstanding descriptive work of Wheeler (1889, 1893) in the United States and Heymons (1895) in Germany. It is ironic that the developmental analysis of cockroaches, among the most studied insects, has advanced so little since.
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Motoneuronal development in the embryonic zebrafish

Development, 1991
Abstract To learn how neurons find their appropriate targets, we have studied two populations of motoneurons in the embryonic zebrafish: primary motoneurons, individually identified cells whose growth cones pioneer the first nerve pathways in the muscle, and secondary motoneurons, cells which develop later and whose growth cones ...
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Fertilization and early embryonic development

Current Opinion in Obstetrics and Gynecology, 1992
Whether one carefully and meticulously records detailed observations in the laboratory, or jumps feet first into new and exciting areas of investigation, each scientist contributes to the advances being made in the control of human reproduction. The study of spermatozoa, oocytes, sperm-oocyte interaction, preembryo growth and development, and early ...
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Embryonic development and pediatric oncogenesis

1997
In recent years, significant advances in understanding the molecular genetics of human cancer have been made. Application of these research advances to clinical practice is beginning. While researchers are identifying oncogenes and tumor suppressor genes and studying their specific functions, clinicians are using knowledge of oncogenes and tumor ...
D O, Walterhouse, J W, Yoon
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Blastokinesis and embryonic development in a phasmid

Experientia, 1950
Die Blastokinese des Embryos der StabheuschreckeB. libanicus besteht aus drei getrennten Bewegungen. Hinweise auf den Mechanismus der einzelnen Bewegungen ergeben sich aus den Resultaten der Zentrifugierung und Kuhlung der Eier wie auch aus den histologischen Untersuchungen der Embryonen selbst.
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The Embryonic Development of the Equine Heart*

Anatomia, Histologia, Embryologia, 1981
AbstractEquine cardiogenesis was studied in embryos of approximately 21 to 49 days of gestation, with particular attention to the partitioning of the ventricular outflow channel. Timing of several morphogenetic events associated with this partitioning was recorded in Table 1.
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Embryonic Development of the Cardiovascular System

2019
This chapter briefly recapitulates milestones in the morphogenesis of the cardiovascular system. Its focus rests on the development and remodelling of the heart and great arteries.
Wolfgang J. Weninger, Stefan H. Geyer
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