(n.) One of the four principal forms of clouds. SeeCloud.
Example Sentences:
(1) Mouse sperm bind to zonae pellucidae of cumulus-free eggs in vitro in a Ca2+-dependent reaction; these sperm are intact by the CTC assay.
(2) The OCI-related membrane appeared a cause of OCI interference with fimbrial ovum capture by preventing the contact between the fimbrial cilia and the cumulus oophorus.
(3) In the presence of 0.02 mM verapamil, the maturation of cumulus-enclosed oocytes was not affected, whereas at the same dose of verapamil the maturation of denuded oocytes was inhibited.
(4) Survival rate of control oocytes (90%; based primarily on morphological appearance of the cumulus) incubated 0 h was greater (P less than .05) than that of all other groups, whereas survival rate of -196 degrees C oocytes (57%) was less (P less than .05) than that of all other groups.
(5) None of the inhibitors (H7, H8 and W7) altered the patterns of protein synthesis of either pig oocytes and cumulus cells after maturation in vitro.
(6) Thus, variation of the acrosome reaction-inducing activity of cumulus cells does not appear to be involved in the variable fertilization of oocytes obtained from follicles of differing maturity.
(7) In most mammalian ovaries, the cumulus cell-oocyte complex (COC) expands at the time of ovulation by depositing an extensive extracellular matrix between the cumulus cells.
(8) Oocyte maturity was graded on a scale from 1 to 5 based on the morphology of the ooplasm, cumulus mass, corona radiata, and membrana granulosa cells.
(9) Immediately before in vitro insemination, the oocytes were divided into three types with different follicle cells: denuded and corona- and cumulus-enclosed oocytes.
(10) When rat eggs in cumulus clot were exposed to epididymal sperm preincubated for five hours, the presence of sodium pyruvate, sodium lactate and glucose was found to play an important role.
(11) No significant binding could be detected either on the oocyte or on the cumulus cells surrounding the oocyte.
(12) 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.
(13) Oocyte-cumulus complexes were obtained, after induced ovulation, from infertile patients participating in an in-vitro fertilization programme.
(14) We conclude that human cumulus cells are a readily available and useful resource for in vitro screening of potential female reproductive toxicants.
(15) Activin A, which was purified as the erythroid differentiation factor, accelerated the maturation of not only follicle-enclosed oocytes and oocyte-cumulus complexes, but also denuded oocytes, as measured by an increase in the percentage of oocytes with germinal vesicle breakdown (GVBD).
(16) Immunostaining for dimeric activin-A occurs in granulosa and cumulus cells of human ovarian follicles and in granulosa-lutein cells of the human corpus luteum.
(17) Adenosine had a significant, but transient, effect in maintaining both cumulus cell-enclosed and denuded oocytes in meiotic arrest; all oocytes had undergone GVBD by 100 min incubation in 1 mM adenosine.
(18) The results strongly suggest that the cumulus oophorus expansion-promoting action of granulosa cells is mediated by PGE2, and support the hypothesis (Downs and Longo, 1983) that granulosa cells might play a similar role in the mechanism of cumulus expansion in vivo.
(19) Adenosine (ADO) in low micromolar levels and hypoxanthine (HYP) in millimolar levels have been shown to inhibit maturation of cumulus-enclosed oocytes.
(20) This factor produced by porcine cumulus cells negatively influenced maturation of bovine oocytes; however, a similar effect was not demonstrated in the mouse.
Tumulus
Definition:
(n.) An artificial hillock, especially one raised over a grave, particularly over the graves of persons buried in ancient times; a barrow.
Example Sentences:
(1) He was always proposing adventures: a night stake-out of a new badger warren "in a mysterious wooded tumulus in Thornham Woods", or a joint attempt to traverse an acre of ancient woodland from one side to another without touching the ground, like the hero of Italo Calvino's beautiful book, The Baron Of The Trees.
(2) The inhumation and cremation burials from two tumulus cemeteries of the Hallstatt period (750-500 BC), Dietfurt and Schirndorf, which are both located in the Upper Palatinate, Bavaria, were used as illustrations.