| 词汇 | example_english_maturation |
| 释义 | Examples of maturationThese examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. Influence of maturation and aging on mechanical and biochemical properties of connective tissue in rats. Nuclear and cytoplasmic determinants involved in the regulation of mammalian oocyte maturation. The animal cap of the egg is marked by a cortical landmark known as the maturation spot. The direction of this rotation appears to be cued by a process related to maturation spot position. An answer to this question will be critical to any further understanding of the signalling pathways involved during maturation in vivo. Branching patterns of contralaterally projecting isthmotectal axons during maturation of binocular maps. Polyploidization and functional maturation are two distinct processes during megakaryocytic differentiation: involvement of cyclin-dependent kinase inhibitor p21 in polyploidization. After every 48 h in culture, 0.3 ml of the maturation medium was replaced with fresh medium. As regards the action of insulin on oocytes, there exist contradictory reports concerning its effect on nuclear maturation. The significant differences between experimental groups in the percentage of oocytes reaching the various stages of nuclear maturation are indicated by different superscripts. Both coupling and oocyte maturation were assayed at 2 h intervals up to 6 h of culture. Induction of maturation in cumulus cell-enclosed mouse oocytes by follicle stimulating hormone and epidermal growth factor: evidence for a positive stimulus of somatic cell origin. In conclusion, the results of this study suggest a positive paracrine effect of co-cultured cumulus cells on meiotic maturation. The aim of this study was to determine the influence of cumulus cells and serum on cytoplasmic maturation. Like the effects of cumulus cells, serum not only prevented zona hardening but also promoted cytoplasmic maturation. The presence of cumulus cells around oocytes is not essential for nuclear maturation in vitro. In amphibians, oocyte maturation is induced by progesterone produced by the follicular cells. After every 48 h in culture, 70 l of the maturation medium was replaced with fresh medium. Nuclear maturation was scored at different times during a 24 h period. The oocyte is incapable of supporting fertilisation until it has completed this final phase of differentiation, termed maturation. In summary, we have imaged the integrated dynamics of cortical granules and microfilaments during maturation, fertilisation and parthenogenesis. Since the resumption of meiotic progression is accompanied by oocyte membrane depolarisation, parasympathetic innervation could exert an inhibitory effect on oocyte maturation. Neither the receptor for progesterone nor the subsequent events that lead to maturation are understood. Another confounding factor is the lack of rigour in assaying the endpoint of maturation - the production of a fertilizable egg. Acceleration of onset of oocyte maturation in vitro by luteinizing hormone. Epidermal growth factor induces maturation of rat follicle-enclosed oocytes. The presence of organic osmolytes in maturation medium enhances cytoplasmic maturation of porcine oocytes. Optimisation of porcine oocyte activation be due to the different culture conditions used for oocyte maturation. Removal of mammalian oocytes from preovulatory antral follicles and transfer to a suitable culture medium leads to spontaneous meiotic maturation in vitro. Relationship between the developmental programs controlling nuclear and cytoplasmic maturation of mouse oocytes. To the best of our knowledge, this phenomenon is reported here for the first time in an anuran oocyte during the maturation process. No mean differences among treatments were observed in nuclear maturation (78-89%). During progesteroneinduced nuclear maturation, disruption of the annulate lamellae took place, as did the formation of numerous vesicles that migrate to the cortex. A macaque model for studying mechanisms controlling oocyte development and maturation in human and non-human primates. Many factors may influence the acquisition of oocyte competence during in vitro maturation, which can be assessed by the subsequent embryonic development. Aspects of follicular and oocyte maturation that affect the developmental potential of embryos. In vitro maturation of horse oocytes: characterization of chromatin configuration using fluorescence microscopy. Before culture, the oocytes were washed three times in a maturation culture medium. Thus, the foci along axonal shafts of immature bipolar cells are likely to represent the sites where terminal boutons are established upon maturation. Presence of organic osmolytes in maturation medium enhances cytoplasmic maturation of porcine oocytes. Epidermal growth factor in human follicular fluid stimulates mouse oocyte maturation in vitro. The percentage of follicles transferred into oocyte maturation medium was significantly higher after culture under oil. Expression of hyaluronan synthases and corresponding hyaluronan receptors is differentially regulated during oocyte maturation in cattle. In most mammals, oocytes develop the ability to block polyspermy during their cycle of growth and maturation. The induction of oocyte maturation: transmembrane signaling events and regulation of the cell cycle. Percentage data are based on total oocytes placed in the maturation medium. However, other factors are likely to have added to such a low proportion of maturation. The mammalian oocyte has a close and important relationship with its surrounding somatic cells during growth and maturation. There is currently no single parameter to define and/or monitor cytoplasmic maturation. Current concepts of cell-cycle regulation to oocyte maturation, fertilization and embryo development. The state of maturation was assessed in oocytes after 22, 23, 24, 25, 26 or 27 h of culture. The present study was performed to determine the mechanism by which procaine induces this particular type of maturation. Regulation of meiotic metaphase by a cytoplasmic maturation promoting factor during mouse oocyte maturation. Molecular and cellular changes associated with maturation and early development of sheep eggs. To overcome this phenomenon, synchronisation of nuclear maturation is necessary. Oocytes were aspirated from 2-6 mm follicles and only oocytes with compact layers of cumulus cells were selected for in vitro maturation. Besides the problem of polyspermy, insufficient cytoplasmic and nuclear maturation can cause low fertilisation and blastocyst rates. Developmental competence of goat oocytes from follicles of different size categories following maturation, fertilization and culture in vitro. In regenerative bridges examined between 7-21 days after transection, there was a wide variation in axon maturation. The maturation and copulation of worms were mainly focused in the summer season. Concurrently, the seeds of imperial knowledge that the boys incubate see their maturation in their own development into full-_edged men of empire. Therefore, maturation together with literacy, as is experienced in the school system and beyond, contribute to the linguistic variation among different age groups. However, the team lacked control over selection, maturation, history and expectancy biases, and they did not appropriately analyse their data. Incompetent oocytes were denuded and preincubated in the presence of the blockers for 30 min and maturation was then induced by progesterone (1 g/ml). Toxicity to the intramolluscan stages may, therefore, in the short term influence the maturation or emergence of cercariae into the snail tissue. Little is known about the effect of toxic substances on cercarial maturation and emergence into the snail host. We determined if heparin acts as an oocyte maturation factor and if the heparin-treated oocytes can be fertilized. Oocytes were fertilized just after maturation (-) or 6 h after calcium ionophore treatment. Where such mortality is high, more rapid maturation can enhance fitness by maximizing survival to reproductive age. If it is monotonic increasing and a non-zero equilibrium exists, then the equilibrium is globally stable for all maturation delay distributions with compact support. Differences in age assessments are likely explained by misidentification of molar positions in the original study and improved standards for dental maturation. Today, historical perspective allows a maturation of electroacoustic musicology. Why are some seeds (non-dormant seeds) able to go through the dehydration stage of maturation and then germinate immediately? Oocytes matured off axis developed a maturation spot more eccentric than that in oocytes matured in an upright position. Effect of growth hormone on in vitro maturation of germinal vesicle of human oocytes retrieved from small antral follicles. No apparent differences were observed between the maturation stages of the parasite. We believe that such experiments represent the only proper way to test the effect exerted by these molecules during oocyte maturation. Introduction of schistosomula to the hepatic portal vein resulted in very high maturation levels. Dynamic events are differently mediated by microfilaments, microtubules, and mitogen-activated protein kinase during porcine oocyte maturation and fertilization in vitro. Dynamic events are differently mediated by microfilaments, microtubules, and mitogenactivated protein kinase during porcine oocyte maturation and fertilization in vitro. Moreover, microphallid trematodes develop sporocysts from which cercariae are released simultaneously at the point of maturation if conditions otherwise are right. Maturation of the organic matter in the vicinity of the intrusion can lead to the generation of liquid hydrocarbons. Overall, this volume is a useful contribution to the maturation of the field. Not all the worms are at the same stage of maturation ensuring a continuous release of eggs into the environment. Thus, we suggest that profilin has a direct role in virus maturation independent of its role in cell fusion. We would like to believe that syncytium is an outcome of viral infection, and as such, is unimportant for viral maturation in single cells. Maturation of central mechanisms will be discussed below. Reinitiation of meiosis in fully grown oocytes (after puberty in mammals) is the first indication of oocyte maturation. They gain this ability while passing down the epididymis, a process known as epididymal maturation. In plants a critical event in growth and development is the maturation and expansion of the central vacuole. During development, structural changes are thought to occur as a consequence of experience and as a consequence of maturation (physical change). The underlying assumption is that there is a necessary maturation of cognitive processes, just as there is of physical and motor processes. The maturation of the field is evidenced by the promulgation of computation into design practices in nearly every discipline that engages in designing. Regressive events such as cell death and the elimination of long axon collaterals and dendritic processes are essential mechanisms of brain maturation. Maturation produces dramatic change in the way individuals are treated by peers, parents, siblings, and authorities. Success in a new behavioral task at this age may then be attributed to the maturation of a new brain region. What are the effects of such deprivation and its associated atrophy in systems related to emotional and cognitive maturation? In addition, the level of character maturation also determines the risk of psychopathology. These examples are from corpora and from sources on the web. Any opinions in the examples do not represent the opinion of the Cambridge Dictionary editors or of Cambridge University Press or its licensors. |
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