Results 121 to 130 of about 3,673 (162)

Embryology of the sheep. I. Extraembryonic membranes and the development of body form

Journal of Morphology, 1972
AbstractThe developmental anatomy of the sheep in the early prenatal period (14 to 34 days) was studied using embryos of known coital age, and embryos of known size with estimated coital age. Characteristics of the embryos were studied by gross observation under the dissecting microscope, and by means of serial sections.
M M, Bryden, H E, Evans, W, Binns
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Radioautographic studies of DNA synthesis in the developing extraembryonic membranes of the mouse

The Anatomical Record, 1967
AbstractTritiated thymidine was injected into pregnant BALB/c mice intravenously at 8, 10, 12, 14 and 16 days of pregnancy. Radioautographs were prepared in order to determine the extent of synthesis of DNA in the extraembryonic membranes at the above stages of gestation. The extent of synthesis of DNA was expressed as a radioactive index. The index is
Saccoman, F M, Morgan, C F, Wells, L J
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Fur1ctions of extraembryonic membranes

1990
Abstract Several extraembryonic membranes arc interposed between the postimplantation mammalian embryo and the maternal tissue, and these subserve a variety of functions which together provide a well-regulated environment for embryo growth and development.
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Analyses of cell surface and secreted proteins of primary cultures of mouse extraembryonic membranes

Developmental Biology, 1979
Abstract Procedures have been developed for primary culture of 13th day mouse parietal and visceral endoderm, yolk sac mesoderm, and amnion cells. We have analyzed cell surface and secreted proteins of these cultures by labeling the cells with radioactive iodine, glucosamine, or amino acids, and/or by immunofluorescence.
A M, Jetten, M E, Jetten, M I, Sherman
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Developmental morphology and evolution of extraembryonic membranes of lizards and snakes (Reptilia, Squamata)

Journal of Morphology, 2020
Abstract Amniote embryos are supported and nourished by a suite of tissues, the extraembryonic membranes, that provide vascular connections to the egg contents. Oviparous reptiles share a basic pattern of development inherited from a common ancestor; a vascular chorioallantoic membrane, functioning as a respiratory organ, contacts the
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[Chromosomal mosaicism of extraembryonic cell membrane, detected during prenatal diagnosis].

Genetika, 1996
Data on detection of chromosomal mosaicism in amnionic cells and chorionic villi obtained by prenatal cytogenic diagnosis are presented. The frequency of chromosomal mosaicism in preparations of amniotic fluid cell culture was 2.6% (6 out of 226), and that in "direct" villus preparations was 1.6% (13 out of 774).
T V, Zolotukhina, N V, Shilova
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Extraembryonic Membranes of the Endoparasitic Wasp Cotesia congregata: Presence of a Separate Amnion and Serosa

The Journal of Parasitology, 1994
Little information is available describing the development of endoparasitic Hymenoptera prior to hatching of the first instar larva. The present study reveals that in Cotesia congregata, and likely other braconid wasp parasites, the serosa and amnion comprise separate layers encasing the developing first instar larva. Examination of newly hatched first
N E, Beckage, I, de Buron
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Adaptive variation in the development of extraembryonic membranes of gekkotan embryos: A meta‐analytical approach

Journal of Morphology, 2021
Abstract Highly mineralized rigid‐shelled eggs characterize one lineage of gekkotans. In contrast, poorly mineralized flexible‐shelled eggs characterize basal lineages of gekkotans and all other squamates. Low oxygen permeability of rigid‐shelled eggs is associated with small eggs and hatchlings, and long incubation lengths compared ...
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Preferential inactivation of the paternally derived X chromosome in the extraembryonic membranes of the mouse

Nature, 1975
RANDOM X inactivation makes the female mammal a natural mosaic for clones of cells having either the maternally derived X (Xm) or paternally derived one (Xp) which is genetically inactive1. There are, however, instances in which inactivation is obviously not random2–7.
Takagi, N, Sasaki, M
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Lysophosphatidic Acid Produced by Hen Egg White Lysophospholipase D Induces Vascular Development on Extraembryonic Membranes

Lipids, 2013
AbstractLysophosphatidic acid (lysoPtdOH), a lysophospholipid mediator, exerts diverse physiological effects, including angiogenesis, through its specific G‐protein‐coupled receptors. Previously, we showed that unfertilized hen egg white contains polyunsaturated fatty acid‐rich lysoPtdOH and lysophospholipase D (lysoPLD).
Junichi, Morishige, Yoshihiro, Uto, Hitoshi, Hori, Kiyoshi, Satouchi, Tanihiro, Yoshiomoto, Akira, Tokumura   +5 more
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