Results 141 to 150 of about 1,091 (176)
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Chorio‐allantoic membrane touch preparations
The Anatomical Record, 1964AbstractA simple method for separating the ectodermal (chorionic) and entodermal (allantoic) layers of the chorio‐allantoic membrane has been devised. It consists of placing, unfolded, a membrane fragment on a rubber balloon filled with water; air is blown briskly upon the membrane by means of a rubber bulb until its shiny surface becomes dull ...
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Catecholamines of the Allantoic Fluid in the Developing Chick Embryo
Nature, 1962ADRENERGIC tissue appears at an early stage in the development of the embryo1 and, in the adult animal, this tissue is the primary source of the catecholamines2. It would be reasonable to inquire whether, during embryogenesis, the activities of developing organs might be influenced by the presence of catecholamines.
R J, BOUCEK, B B, BOURNE
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Chromosome Preparations from the Avian Allantoic Sac
Stain Technology, 1972An abundance of mitotic cells, a rapid and uniform response of cells to mitotic inhibition, ease in obtaining a monolayer of cells, clear and well-spread chromosomes make the allantois an ideal tissue for squash preparations. After a 45 min incubation of each embryo, still in the shell, with 0.02 ml of 0.05% Colcemid, 4-day avian embryos were treated ...
S E, Bloom, G, Povar, D B, Peakall
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The buffering capacities of allantoic and amniotic fluids of the chick
Archives of Biochemistry and Biophysics, 1954Abstract Aliquots of chick amniotic and allantoic fluids at 8, 10, 12, 14, and 16 days of age were titrated with 0.1-ml. additions of 0.0985 N HCl and 0.0982 N NaOH. The amniotic fluid exhibited no buffer capacity on the 8th, 10th, and 12th days.
C A, RANDLES, A L, ROMANOFF
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APPEARANCE OF OESTRONE SULPHATE IN THE ALLANTOIC FLUID OF THE COW
Journal of Endocrinology, 1978Abstract Reproductive Physiology Program, Animal Research Institute, Ottawa, Ontario, Canada, K1A 0C6 and * Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario, Canada, N1G 2W1 (Received 15 May 1978) The ability of the conceptus to synthesize oestrogens during the early ...
H A, Robertson, G J, King, J A, Carnegie
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Morphological study of the chorio-allantoic fetal membranes
European Journal of Obstetrics & Gynecology and Reproductive Biology, 1984Morphological study of the chorio-allantoic fetal membranes has demonstrated the existence of foot processes extending from the main body of amniotic cells and containing microfibrils arranged in dense bundles as described in podocytes of renal glomerulae; on the surface fronds and between their bases many small pits and caveolae are seen; in the ...
H N, Minh, A, Smadja, L, Orcel
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The bovine allantoic and amniotic epithelia
Anatomy and Embryology, 1982The ectodermal and endodermal coverings of the allanto-amniotic membrane in cattle fetuses of various gestational ages have been studied by scanning and transmission electron microscopy. We have observed that the allantoic and amniotic epithelia have rather similar cells which are rich in filaments but poor in organelles.
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Prenatal management of an allantoic cyst with patent urachus
Archives of Gynecology and Obstetrics, 2009Umbilical anomalies are a rare presentation in fetal and neonatal period. We report a case of a patent urachus with an allantoic cyst diagnosed prenatally at 14 weeks of gestation and its spontaneous course throughout ongoing pregnancy. Thoroughly ultrasound examination enabled comprehensive counselling of the parents and together with pediatricians ...
Jan, Weichert +4 more
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A Modified Method for Cannulation of the Avian Allantoic Sac
Avian Diseases, 1967DuBose (1) described a method for periodic harvest of allantoic fluid from avian embryos by cannulation. With his method, too many eggs had to be discarded because the CA membrane dropped away from the shell membrane during the attempt to form an air bubble in the allantoic sac.
C E, Jordan, B M, Monk, R T, DuBose
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Reproduction of Mumps Virus in the Chorio-allantoic Membrane
Nature, 1955LITTLE is known about the reproduction cycle of mumps virus. This seems strange, as some of the techniques available for influenza virus should be applicable to this virus, which is in many ways similar in its reactions. The method introduced by Hoyle1,2 in his study on the multiplication of influenza virus in egg membranes, however, did not yield ...
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