Results 161 to 170 of about 397,460 (189)
Some of the next articles are maybe not open access.
Journal of Experimental Zoology Part A, Comparative Experimental Biology, 2003
AbstractAn understanding of the evolutionary morphology of extraembryonic membranes in reptiles requires information about oviparous as well as viviparous species. We are studying histology and ultrastructure of the extraembryonic membranes of snakes to clarify the evolutionary history of reptilian fetal membranes, including determination of basal ...
Daniel G. Blackburn
exaly +3 more sources
AbstractAn understanding of the evolutionary morphology of extraembryonic membranes in reptiles requires information about oviparous as well as viviparous species. We are studying histology and ultrastructure of the extraembryonic membranes of snakes to clarify the evolutionary history of reptilian fetal membranes, including determination of basal ...
Daniel G. Blackburn
exaly +3 more sources
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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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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Journal of Insect Physiology, 2006
The embryo of Toxoneuron nigriceps (Hymenoptera, Braconidae) is surrounded by an extraembryonic membrane, which, at hatching, releases teratocytes and gives rise to a cell layer embedding the body of the 1st instar larva. This cell layer was studied at different developmental times, from soon after hatching up to the first larval moult, in order to ...
GRIMALDI, ANNALISA +11 more
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The embryo of Toxoneuron nigriceps (Hymenoptera, Braconidae) is surrounded by an extraembryonic membrane, which, at hatching, releases teratocytes and gives rise to a cell layer embedding the body of the 1st instar larva. This cell layer was studied at different developmental times, from soon after hatching up to the first larval moult, in order to ...
GRIMALDI, ANNALISA +11 more
openaire +6 more sources
Acta Biomaterialia
Extraembryonic tissues play a crucial role in embryonic development and fetal growth and exhibit remarkable biological and biomechanical properties including, pro-angiogenic, anti-inflammatory, immunomodulatory, anti-fibrotic, antimicrobial, and viscoelastic.
Gustavo Henrique Doná Rodrigues Almeida +13 more
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Extraembryonic tissues play a crucial role in embryonic development and fetal growth and exhibit remarkable biological and biomechanical properties including, pro-angiogenic, anti-inflammatory, immunomodulatory, anti-fibrotic, antimicrobial, and viscoelastic.
Gustavo Henrique Doná Rodrigues Almeida +13 more
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Journal of Morphology, 2011
AbstractPseudemoia pagenstecheri is a viviparous Australian scincid lizard in which the maternal–embryonic placental interface is differentiated into structurally distinct regions. The chorioallantoic placenta contains an elliptical‐shaped region, the placentome, characterized by hypertrophied uterine and embryonic epithelial cells supported by dense ...
Stinnett, Haley K. +5 more
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AbstractPseudemoia pagenstecheri is a viviparous Australian scincid lizard in which the maternal–embryonic placental interface is differentiated into structurally distinct regions. The chorioallantoic placenta contains an elliptical‐shaped region, the placentome, characterized by hypertrophied uterine and embryonic epithelial cells supported by dense ...
Stinnett, Haley K. +5 more
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Analyses of cell surface and secreted proteins of primary cultures of mouse extraembryonic membranes
Developmental Biology, 1979Abstract 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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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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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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Journal of Experimental Zoology Part B: Molecular and Developmental Evolution, 2012
ABSTRACTYolk is the primary source of calcium for embryonic growth and development for most squamates, irrespective of mode of parity. The calcified eggshell is a secondary source for embryonic calcium in all oviparous eggs, but this structure is lost in viviparous lineages.
Fregoso, Santiago P. +2 more
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ABSTRACTYolk is the primary source of calcium for embryonic growth and development for most squamates, irrespective of mode of parity. The calcified eggshell is a secondary source for embryonic calcium in all oviparous eggs, but this structure is lost in viviparous lineages.
Fregoso, Santiago P. +2 more
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Isolating Extraembryonic Membranes
Cold Spring Harbor Protocols, 2006Andras, Nagy +3 more
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Clinical Genetics, 1974
The study concerns the diagnosis of fetal condition early in pregnancy ‐ within the first trimester. An instrument was designed to allow biopsy of the extraembryonic membranes under visual control. The instrument was tested in 95 pregnant women prior to legal termination of pregnancy.
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The study concerns the diagnosis of fetal condition early in pregnancy ‐ within the first trimester. An instrument was designed to allow biopsy of the extraembryonic membranes under visual control. The instrument was tested in 95 pregnant women prior to legal termination of pregnancy.
openaire +2 more sources