(1) Early diagnosis, high rate of survival of light-for-date babies and babies with congenital heart defect, and, possibly, exogenous factors working on gametogenesis might be an explanation.
(2) These data show that spectrin is present in all stages of gametogenesis and embryogenesis, except in mature spermatozoa; and that it undergoes cytoplasmic redistribution during morphogenesis.
(3) Mutations at the white spotting locus (W) affect various aspects of hematopoiesis, melanogenesis and gametogenesis during development and in the adult animal.
(4) A possible chromosome segregation disturbance in gametogenesis due to senescent changes of heterochromatic regions is discussed.
(5) In males, both plasma T and 11-KT initially increased in November and then showed further increasings during the rest of the period of gametogenesis (December) to reach their peak levels in the first half of the spawning period (end of January).
(6) If the right to gametogenesis is restricted, then every replicator symbiont and nuclear genome alike and hence every cell of the developing embryo, will have an incentive to compete.
(7) Males cultured for several years at 18 degrees C expressed a stable sexual phenotype when induced to undergo gametogenesis; males remained male.
(8) Synchronous gametogenesis in the water mold Allomyces arbuscula is blocked by actinomycin D added at the onset of the process.
(9) Sl and W mutations affect the same cellular targets in melanogenesis, gametogenesis and hematopoiesis during embryonic development and in adult life.
(10) These results are considered as nonrandom in pathology of male gametogenesis.
(11) for 21 days led to insignificant changes of plasma FSH, LH, PRL and T along with unaltered activities of testicular delta 5-3 beta-HSD, 17 beta-HSD activities and gametogenesis.
(12) Temperature shift experiments and antibiotic studies have indicated that this gene is expressed within 6 hr after the onset of gametogenesis in liquid culture, and its product has a lifetime of about 4 hr at 35 degrees.
(13) Fundamental animal studies by pioneers, such as Chang, Thibault and Edwards, taught us nature's axioms for gametogenesis, fertilization, development and differentiation.
(14) Northern blot analysis revealed that steady-state levels of the 2.4-kilobase GLE mRNA increased during growth and mitotic cell division in the vegetative cell cycle and also increased markedly during gametogenesis under nitrogen-starved conditions.
(15) Thus, it appears that the processes of hematopoiesis, melanogenesis, and gametogenesis in mammals involve a similar strategy to that used in other species for transmitting and receiving positional cues during development.
(16) In nearly all animals, the regulation of germinal cell development is postulated to be mediated through the control of gonadal somatic cell functions, associated with the creation and maintenance of an optimal milieu within the spermary of seminiferous tubule in which gametogenesis takes place.
(17) During gametogenesis RNA is de novo synthesized and becomes associated with the polyribosomes.
(18) Reproduction is a complex, stepwise series of processes that begins with gametogenesis, continues through gamete interaction, implantation, embryonic development, growth, parturition, and postnatal adaptation, and is completed with the development and sexual maturation of the newly formed organism.
(19) In this study, the patterns of expression of inhibin alpha-subunit mRNA during mouse gametogenesis were examined by RNA blot, cytoplasmic dot and in situ hybridization techniques.
(20) The relationship between allophanate lyase induction and gametogenesis is discussed.
Mitosis
Definition:
(n.) See Karyokinesis.
Example Sentences:
(1) MAF-G activity was inhibited by mitomycin C and colchicine, which inhibit DNA synthesis and mitosis, respectively, but not by 2-deoxy-D-glucose, an inhibitor of glucose metabolism.
(2) With the stimulated liver being irradiated, the number of cells synthetizing DNA and entering into mitosis was seen reduced almost twice, whereas DNA synthesis and entering into mitosis were delayed, resp., by 4 and 6 hours.
(3) The distribution of cells at the stage of DNA synthesis and mitosis in all the parietal peritoneum speaks of the absence of special proliferation zones.
(4) Isoproterenol [IC 50 approximately 1 X 10(-9) M], prostaglandins, dibutyryl cyclic AMP [IC 50 approximately 2 X 10(-5) M], papaverine, theophylline and 5' AMP were inhibitory in the assay, whereas dibutyryl cyclic GMP and the cholinergic stimulator carbamylcholine either stimulated or had no effect on mitosis.
(5) Despite severe defects in the 1st or 2nd meiotic spindles in all mutants, no effect on mitosis was observed.
(6) Since transcription does not take place during mitosis, the amount of protooncogene products is rapidly decreased (they are extremely unstable).
(7) The role played by macrophages in two effects of lipopolysaccharide (LPS) on the immune system of the mouse-substitution for helper T cells and induction of B-cell mitosis-has been investigated.
(8) The results obtained allow to conclude that heterophasic condition of the fused cells is one of the causes of pathological mitosis of polykaryons and of their death.
(9) The effect of intracerebroventricular injection of the mitosis inhibitor colchicine on expression of mRNA for nerve growth factor (NGF), brain-derived neurotrophic factor (BDNF), and neurotrophin 3 was studied in the rat brain with in situ hybridization.
(10) The major events of mitosis have traditionally been considered to represent two distinct pathways and have been studied by two separate groups of workers.
(11) The V79 cells were treated for 30 min and in general, loss of a stainable spindle could be demonstrated at slightly higher concentrations than c-mitosis.
(12) However, unlike animal cell calmodulin, endosperm calmodulin appears to associate with kinetochore microtubules throughout mitosis, which suggests a specialized role for higher plant calmodulin in the regulation of kinetochore microtubule dynamics.
(13) This finding is directly opposed to that in rat skin where mitosis is stimulated.
(14) The restriction enzymes were introduced by electroporation into exponentially growing cells during the second replication cycle in bromodeoxyuridine, and SCEs were analyzed at mitosis.
(15) The absence of these mRNAs in mitosis and their disappearance at 4 hr and later in meiosis suggest that the rec7 and rec8 gene products may be involved primarily in the early steps of meiotic recombination in S. pombe.
(16) The distribution of bone marrow cells within the cell cycle was determined by flow microfluorometry and 7 hours after treatment with vincristine consisted of 69% in G1, 21% in S, and 9% in mitosis.
(17) In contrast, in HeLa, a human epithelial cell, keratin-containing IFB appear to dissemble as cells enter mitosis (Franke, W. W., E. Schmid, C. Grund, and B. Geiger, 1982, Cell, 30:103-113).
(18) After administration of vinblastine, a drug blocking mitosis in metaphasis, the percentage of lymphoblasts decreases whereas the percentage of X cells increases.
(19) The ultrastructure study, done before the 19th week ("pretumor" phase) confirms some previous observations (increase in the zone of mitosis, secretory changes, mutation producing effects).
(20) Still, they gave valuable information in relation to environmental screening; thus, the finding of c-mitosis may indicate risks of aneuploidy.