Results 11 to 20 of about 1,919,992 (143)
野生动物学报, 1990 丹顶鹤（Grus japonensis）成为濒危种在自然界中已日趋减少,而且在人工饲养条件下,丹顶鹤的繁殖普遍存在的问题是卵的受精率低,有些鹤虽然已具有适宜的饲养环境,饲料和光照等条件,但产的卵仍然不受精或受精率很低。比较可行的措施是采用人工授精技术。 70年代人工授精技术应用于鹤类繁殖在国外获得成功。1977年美国国际鹤类基金会Archibala.G.
张玲, 刘大军, 宋艳珠, 孙永贤
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野生动物学报, 1992 本文报道了狐狸人工授精研究的初步结果。对43只银狐种公狐用手指按摩法采精109次,成功率为89.9％;对12只兰狐种公狐用同样方法采精98次,成功率为82.7％。人工输精日期由发情检测器决定。在阴道电阻值从峰值下降的第一天进行第一次输精。七只母狐连续2—3d每天用新鲜精液进行子宫内人工输精一次,所有母狐均妊娠并产仔,平均胎产仔数为7.85只。输银狐新鲜精液的两只母银狐的胎产仔数分别为8只和7只。输银狐新鲜精液的两只母兰狐分别产下1只和14只属间杂种狐仔（称兰霜狐）。第一次输银狐新鲜精液,然后第二 ...
孔庆松, 刘志平, 方健, 张宪宁
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Zhongshan Daxue xuebao. Yixue kexue ban, 2015 【目的】 探讨丈夫精子宫腔内人工授精（ＩＵＩ）妊娠率的相关影响因素。【方法】 回顾性分析不育不孕患者共１ ３８２个ＩＵＩ治疗周期，对处理后前向运动（ＰＲ）精子数、女方年龄、优势卵泡数、治疗方案、病因等因素与临床妊娠率的关系进行统计分析。【结果】 １ ３８２个ＩＵＩ周期共获得１６７例临床妊娠，总周期妊娠率是１２．１％。①ＰＲ精子数对妊娠率影响不大（Ｐ ＞ ０．０５）；② 女性年龄超过４０岁，妊娠率下降；③２和３个优势卵泡妊娠率高于１个卵泡（Ｐ ＝０．００１）；④促排卵周期妊娠率高于自然周期（Ｐ ＝ ０ ...
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Journal of Advanced Nursing, Volume 77, Issue 4, Page 1800-1812, April 2021., 2021 Abstract Aims To demonstrate the attitudes of general practitioners (GPs), nurses, persons with dementia, and caregiver towards suitable tasks and qualification needs for and the acceptance and impact of advanced nursing roles in German dementia primary care.
Bernhard Michalowsky +12 more
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Factors Affecting of Lactobacillus plantarum K25 Fermentation to Produce Exopolysaccharide and Its Application(植物乳杆菌K25发酵产胞外多糖的影响因素及其应用) [PDF]
Shipin kexue jishu xuebao, 2018 The extracellular polysaccharide (EPS) from Lactobacillus plantarum plays important roles in the special texture and flavor of fermented dairy products.
JIANG Yunyun(姜云芸) +7 more
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It is an about Work to the Artificial Insemination of a Dog Based on a Clinical Thremmatology Remark [PDF]
, 2020 人工授精は種々な動物で研究・実用化され、特に、牛の人工授精は多くの研究が行われ、精子や卵子の保存も含めて、動物繁殖の技術として日常行われるようになった。しかし、多くの動物は人工授精に関し、その技術的なことは確立されていない。いずれの動物も精子や卵子の保存、人工授精が容易に実施できれば、動物資源としての活用上大きな進歩となる。現在、犬の繁殖に関する技術は牛に比べ、多くの面で検討しなければならない点がある。なかでも、雌犬の生殖器は特に頸管部の形状が複雑なため、効率よく子宮腔内に精子を注入しにくく ...
コジマ, ヨシヒコ +2 more
core
, 1990 <正> Schcank等(1967)曾报道用电刺激法采取马蹄蟹(Limulus polyphemus)的精荚和卵子,并声称由此获得的精、卵可以互相授精,但未见更详细的说明和证明授精的根据。有关中华绒螯蟹(Eriocheir sinensis)的人工授精 ...
张菁, 陆仁后
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, 2015 Objective: To discuss artificial insemination lie on your back after the surgery time and to obtain ideal pregnancy outcome. Methods: Thisstudy retrospectively analyzed patients undergoing for pure artificial insemination in in Renji Hospital,Shanghai ...
Liu, Hua; Department of reproductive center, REN JI Hospital affiliated to Shanghai Jiaotong University School of medicine, Shanghai, China +1 more
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Deep quantile regression for growth and maturation reaction norms
Methods in Ecology and Evolution, Volume 17, Issue 1, Page 111-124, January 2026.Abstract Understanding species' growth and maturation responses to anthropogenic and environmental pressures is crucial for tracking demographic shifts, phenotypic change and ensuring population sustainability. Traditional regression methods often focus on modelling the conditional mean of life‐history traits, potentially overlooking heterogeneity in ...
Guankui Liu +4 more
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Uncovering Xi Jinping's Policy Agenda: Text As Data Approach
The Developing Economies, Volume 63, Issue 1, Page 9-46, March 2025.How many agendas has Xi Jinping put forth and promoted since taking office in 2012, and what are the types of agendas? How much of political attention has each agenda received, and how has the allocation of attention changed over time? We utilize a dataset of presidential statements, speeches, and reports from 2012 to 2022 and employed automated text ...
Jaehwan Lim, Asei Ito, Hongyong Zhang
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