(a.) Of or pertaining to the yolk of eggs; as, the vitelline membrane, a smooth, transparent membrane surrounding the vitellus.
Example Sentences:
(1) We recommend, that the term vitelline macular degeneration ought to be used intead of Best's macular degeneration.
(2) This expansion involves the migration over the inner surface of the vitelline membrane of a specialized band of 'edge cells' at the blastoderm periphery.
(3) The vitelline envelope (VE) that surrounds an egg released from the ovary into the coelom of Xenopus laevis differs markedly, in structure and penetrability, from the VE surrounding an oviposited egg.
(4) Crescent-shaped Balbiani's vitelline body consists of ribonucleoproteins, lipoproteins, and phospholipids.
(5) Experimental evidence is presented showing that the component responsible for this effect acts on the vitelline envelope of the egg, increasing its susceptibility to sperm lysin.
(6) Similarities were increased number of lipid droplets in the cumulus cells, widened peri-vitelline space, peripheral displacement or breakdown of the oocyte nucleus and disconnection of the junctions between cumulus cell projections and the oolemma.
(7) The purine inhibits the detachment of the vitelline layer from the sea-urchin egg plasma membrane after fertilization and this effect leads to polyspermy.
(8) It has been suggested that gamete binding in ascidians might be mediated by an enzyme-substrate complex established between a sperm glycosidase and corresponding glycosides on the vitelline coat.
(9) cDNA clones for two Drosophila vitelline membrane genes have been identified on the basis of: (i) stage and tissue specificity of transcription and (ii) size and amino acid content of the translation product.
(10) Clinical, gross and microscopic findings suggested that the mesenteric fold represented a remnant of vitelline vessel that persisted in the peri-ileal portion of its course.
(11) This vitellin precursor, or vitellogenin, was purified by gel permeation and ion-exchange column chromatography.
(12) The pentapeptide GRGDS (but not RGD) inhibited PLN-vitelline layer binding half-maximally at 0.2 mM.
(13) The visceral yolk sac capillaries and vitelline vessels of conceptuses in excess d-glucose were sparse, patchy, and nonuniformly located.
(14) Culture of vitelline membrane of eggs within 2 days was compared with culture of eggs stored 10 days post oviposition.
(15) However, anti-sperm attack molecule Fab fragments impaired elevation of the vitelline layer.
(16) Vitelline coats (VCs) of Phallusia mammillata were isolated and purified following homogenization of live eggs in order to investigate the molecular basis of sperm-egg recognition.
(17) The vitelline gland of 14-day in vitro-maintained S. japonicum stained with Fast red B, while that of S. mansoni did not.
(18) Vitelline vessels, dorsal aorta, aortic arches, cardinal veins, and cardiac chambers were identified as areas of decreased signal intensity.
(19) BTV antigen was dense in proteid yolk bodies and in the vitelline membrane of the developing oocytes.
(20) After staining with hematoxylin-phosphorus-tungstate, the vitelline epithelium of untreated and progesterone-treated rats showed a blue granulation.
Yolk
Definition:
(n.) The yellow part of an egg; the vitellus.
(n.) An oily secretion which naturally covers the wool of sheep.
Example Sentences:
(1) Whether hen's egg yolk can be used as a sperm motility stimulant in the treatment of such conditions as asthenospermia and oligospermia is subjected for further study.
(2) Results obtained from cumulative labeling and pulse-labeling and chase experiments with cells from late gastrulae, yolk plug-stage embryos, and neurulae showed that the 30S RNA is an intermediate in rRNA processing and is derived from 40S pre-rRNA and processed to 28S rRNA.
(3) The wall of the yolk sac thickens as a result of this infolding and the densely packed capillaries.
(4) When foods such as dairy products contain large numbers of egg yolk-negative strains of S. aureus, the PPSA agar has the advantage over egg yolk containing media such as Baird-Parker agar that fewer suspect colonies have to be confirmed.
(5) In lipid extracts of yolk, more than 90% of the radioactivity was as unchanged cholecalciferol and 5% as 25-hydroxycholecalciferol.
(6) This study provides evidence for a maternal yolk factor associated with increased tolerance and resistance of larvae to copper.
(7) Both genes are expressed in the fetal liver, gut, and visceral endoderm of the yolk sac and are repressed shortly after birth in the liver and gut.
(8) After clusters of pigmented epithelial cells have rested immobile in the yolk sac of Blennius pholis for 2-4 days (Trinkaus, '88), their constituent cells transform into mesenchymal, dendritic melanocytes.
(9) The patient, a 28-year-old woman, in her ninth week of pregnancy, was operated on for stage Ia, mixed germ cell tumor (grade 3 immature teratoma + yolk sac tumor) of AFP decreased to the normal level.
(10) Fe2+ and L-ascorbic acid induced oxidation of cholesterol was investigated in liposomes of egg yolk phosphatidylcholine (PC).
(11) Cadmium, anti-visceral yolk sac antibody (AVYS) and trypan blue all inhibited pinocytosis in a concentration-dependent fashion when added to the culture medium, although at low concentrations trypan blue was slightly stimulatory.
(12) Although small amounts of AFP are synthesized by sharks in the liver, the greatest site of synthesis is actually the stomach, with smaller amounts synthesized in the intestinal mucosa; no synthesis was observed in the shark yolk sac.
(13) In three experiments with semen samples from a single individual capacitated at 4 degrees C for 1, 2 or 3 days in TEST-Yolk buffer we obtained 33, 30 and 34 sperm karyotypes respectively.
(14) A stem cell line has been obtained with cell culture, having a germ cell character and a yolk sac configuration.
(15) We postulate that the apposition of trophotaenial epithelium to the internal ovarian epithelium constitutes a placental association equivalent to a noninvasive, epithelioform of an inverted yolk sac placenta.
(16) The histological characteristics and the presence of laminin in the stroma suggested that the malignant tumors belonged to the category of yolk sac tumors.
(17) PLA2-II was over ten times more potent than PLA2-I, although its lipolytic activity toward egg-yolk was even slightly weaker (73%) than that of PLA2-I.
(18) The majority of testicular germ cell tumors in adults are accompanied by neoplastic intratubular germ cells; these cells were uniformly absent in ten pure yolk sac tumors (endodermal sinus tumors) of the testicle in children studied morphologically and immunohistochemically.
(19) The beta-globin gene remained inactive at the fetal stage, whereas the normal A gamma-globin gene was expressed beyond the embryonic (yolk sac) stage into the fetal stage of development and then became inactive in adult erythroid cells.
(20) The yolk spheres, which were free of precipitates, gave the characteristic signal of the nitrogen K-edge.