Results 41 to 50 of about 20,748 (170)
, 1999 部局長の交替平成11年度国立学校施設整備事業の決定大学院生命科学研究科の設置大学院生命科学研究科入学式夫馬 進教授が恩賜賞・日本学士院賞を, 入谷 明 名誉教授, 佐々木 丞平教授が日本学士院賞を受賞平成11年度入学試験諸統計クラブ紹介 ...
京都大学広報委員会
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野生动物学报, 2010 雌性大熊猫体重约100 kg,但所产胎儿仅100 g左右,只有母体体重的千分之一。这是因为大熊猫胚胎延迟着床,即受孕后,受精卵在子宫内呈游离状态,直到后期才开始着床发育 ...
张金国
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Number of Sperm Produced and Ejaculated by Male Small Yellow Eurema mandarina in Summer Generations [PDF]
, 2013 Mating activity of male Eurema mandarina in the summer generation is low shortly after emergence. Changes in the ejaculate potential of virgin males with age were examined for spermatophore mass as well as the number of eupyrene and apyrene spermatozoa ...
Watanabe Mamoru +2 more
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Banking Concentration and Health Performance in Developing Countries
World Affairs, Volume 188, Issue 4, Winter 2025.ABSTRACT This article examines how banking concentration affects health performance in 80 emerging nations between the years 2000 and 2020. The system GMM and OLS‐FE approaches are employed. Health performance in terms of life expectancy is negatively impacted by bank concentration.
Emeride F. Kayo +2 more
wiley +1 more source
Zhongshan Daxue xuebao. Yixue kexue ban, 2007 【目的】探讨常规体外受精胚胎移植（in vitro fertilization and embryo transfer,IVF-ET）不受精时,应用卵母细胞单精子显微注射（intracytoplasmic sperm injection,ICSI）技术进行补救授精的临床意义。【方法】2001年8月～2005年8月,在499个常规IVF-ET周期中有25个周期完全不受精,进行补救ICSI,并与同期实施的179个正常ICSI周期进行比较。【结果】补救ICSI组与正常ICSI组比较,HCG日平均血清雌二醇水平、
李晓虹 +8 more
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野生动物学报, 2022 季节性繁殖是哺乳动物在长期的进化过程中,为了应对外界环境的变化,选择合适的季节进行繁殖的行为。雄性哺乳动物在非繁殖季节表现为睾丸退化,精子发生的减数分裂过程受阻,进入繁殖季节性腺恢复,重新启动精原细胞的分裂和分化,这种季节性精原细胞分裂和分化与精子发生受到环境因子和多种体内激素的调节。就光周期信号分子——褪黑激素通过TSH-DIO2/DIO3-T3逆行通路和HPG轴—睾酮—视黄酸信号系统对雄性哺乳动物繁殖季节性调控的研究综述可知:褪黑激素通过调控HPG轴的功能促进精子的发生 ...
杨 笛, 陈婉依, 宫泽儒, 杨 明
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The effects of heat shock on nuclear events in conjugation of paramecium caudatum [PDF]
, 1997 筑波大学University of Tsukuba博士（理学）Doctor of Philosophy in Science1996【要旨 ...
44487, 楊, 仙玉
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World Medical &Health Policy, Volume 17, Issue 4, Page 688-694, December 2025.ABSTRACT The study by Morshed‐Behbahani et al. highlights that financial barriers are not the sole obstacle to accessing infertility treatment. To ensure equal access for all, infertility treatment should be regarded as a universal human right, with the public sector assuming responsibility for its provision.
Arturs Kalva, Girts Brigis
wiley +1 more source
野生动物学报, 2011 精液品质评定的常见方法有精子活力、畸形率和顶体完整率等指标,但这些指标不能评定精子的真实受精能力。目前低渗膨胀试验作为检验精子膜功能的一种方法得到广泛认可,利用它可检验具有完整膜的精子是否具有生化活性。本试验通过对冷冻2只黑猩猩精液进行低渗膨胀来评定冷冻精子的膜完整性。试验结果显示,本研究中的黑猩猩的冷冻精子在低渗溶液中的膨胀率较高,表明试验黑猩猩的冷冻精液有较高的活力,精子具有较高的穿透率和受精能力。
黄志宏 +5 more
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