Results 41 to 50 of about 9,466 (165)
Histological Studies on Testes Development of the Mud Crab,Scylla serrata [PDF]
, 2002 组织学观察表明 ,锯缘青蟹 (Scyllaserrata)精巢发育周期可以分为精原细胞期、精母细胞期、精子细胞期、精子期和休止期 5个时期。在划分精巢发育期的基础上 ,结合生精小管直径和成熟节段比例这 2个指标 ,可以较准确地反映锯缘青蟹精巢的发育状况。而成熟节段比例可以作为锯缘青蟹精巢发育的表征指标。 【英文摘要】 The testicular development cycle of Scylla serrata can be divided into 5 periods:the ...
叶海辉 +3 more
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Zhongguo shiyan zhenduanxue, 2013 1临床资料患者,男,24岁,建筑工人,婚后三年不育来我院就诊,性生活正常,未避孕,妻子未孕。体格检查:男性第二性征明显,外生殖器发育正常,双侧睾丸体积约16ml,质地正常。无其他疾病史。精液检查:精子浓度1.22×106/ml,a级10.53%,b级10.53%,c级5.26%,d级73.68%,活率30%,精液量6.2 ml,pH7.0。血清生殖激素检查 ...
李琳琳 +6 more
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A Review on the Androgenic Gland of the Decapod Crustacea [PDF]
, 2001 【英文摘要】 YE Hai Hui\ LI Shao Jing\ WANG Gui Zhong (Department of Oceanography, Xiamen University\ Xiamen\ 361005,China)福建省重中之重“福建省海洋生物优良种质和生物活性物质的应用基础研究 ...
叶海辉, 李少菁, 王桂忠
core
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
wiley +1 more source
Zhongguo shiyan zhenduanxue, 2016 残角子宫属于先天发育畸形的一种,发病率较低,在临床上较为少见[1]。残角子宫往往与另一侧发育较好的子宫腔不相通,与正常的宫腔仅有纤维束相连。受精卵经残角子宫一侧的输卵管进入子宫残角内进而生长发育,称之为残角子宫妊娠。随着妊娠月份的增加,残角子宫的肌壁由于发育不良 ...
孙小淳 +4 more
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Ultrasound in Obstetrics &Gynecology, Volume 65, Issue 1, Page 85-93, January 2025.ABSTRACT Objective Accurate differentiation between placenta accreta spectrum (PAS) and uterine‐scar dehiscence with underlying non‐adherent placenta is often challenging, even for PAS experts, both prenatally and intraoperatively. We investigated the use of standardized two‐dimensional grayscale ultrasound and Doppler imaging markers in ...
T. Adu‐Bredu +3 more
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浙江大学学报. 医学版睾丸支持细胞在精子发生过程中起重要作用。精子发生的异常与睾丸支持细胞糖脂代谢紊乱密切相关。睾丸支持细胞的代谢环境为缺氧，其主要的代谢方式包括糖酵解和脂肪酸β氧化，其中糖酵解是睾丸支持细胞为生精细胞提供能量的经典途径，而脂肪酸β氧化可能是睾丸支持细胞产生腺苷三磷酸的主要途径。目前睾丸支持细胞糖脂代谢与生精细胞发育的关系、糖代谢与脂代谢之间的联系尚不明确。包括性激素在内的多种激素可以通过调控内分泌影响睾丸支持细胞糖代谢。AMPK、mTOR ...
李 舒豪, 孔 亮, 梁 景岩, 马 坦
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Effects of Nonylphenol and Estradiol on Gonad Development and Sperm Motility in Chinese Black Sleeper Bostrichthys sinensis [PDF]
, 2010 本文以中华乌塘鳢（BostrichthyssinensisLacépède）为研究对象，以壬基酚(4-nonylphenol，NP)和雌二醇（17β-estradiol，E2）为环境内分泌干扰物的代表，从幼鱼和成鱼两个层次上研究其对中华乌塘鳢性分化、幼鱼性腺发育以及对雄鱼精子发生和精子活力的影响，探讨养殖中华乌塘鳢雌雄同体产生的诱因及其作为水环境污染的指示生物的可行性，为发展鱼类健康养殖和环境保护提供科学依据。 在幼鱼暴露阶段，将30日龄的幼鱼暴露于1、10、100μg/L3个质量浓度的NP和10μg ...
左明杰
core
Advances on toxicity of nano-cerium oxide to male reproductive system [PDF]
Cerium oxide nanoparticles (CeO2 NPs), as the oxides of the most abundant elements in rare earths, have been widely used in biomedical and industrial production and other fields that are closely related to human life.
bin YUWen +6 more
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Zhongguo shiyan zhenduanxue, 2012 目的研究新疆地区男性不育患者精液质量状况。方法利用计算机辅助精液分析技术,收集1500例主诉不育的男性精液进行质量检测,并分析结果。结果新疆地区1500例男性不育患者精液一般性状检查显示,精液量平均2.7±1.3ml,异常率2.2%（33/1500）;精液颜色异常率9.7%（146/1500）;精子粘稠度异常率32.6%（489/1500）;精子液化时间平均32.8±18.5min,异常率33.5%（502/1500）;精液白细胞数异常率20.3%（305/1500）。精子质量检查提示精子密度平均（9 ...
王军, 吕红蕾, 黄海鹭
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