Results 41 to 50 of about 10,045 (147)

Comparison of open fetal, fetoscopic and postnatal surgical repair for open spina bifida: decision analysis

open access: yesUltrasound in Obstetrics &Gynecology, Volume 66, Issue 4, Page 433-442, October 2025.
ABSTRACT Objective Currently, there are several surgical approaches to manage fetal open spina bifida (OSB), namely postnatal surgical repair, open fetal surgery and its minimally invasive alternative, fetoscopic repair. Our objective was to determine the optimal surgical approach for OSB, weighing the benefits and risks to the fetus and the pregnant ...
Y. Kunpalin   +6 more
wiley   +1 more source

湖南郴州地区近九年来33871例精液质量的动态分析

open access: yesZhongguo shiyan zhenduanxue, 2009
目的为了解男性的生殖健康状况及精液质量的趋势,对我院近九年检查的精液质量状况进行分析。方法按《WHO人类精液及精子-子宫黏液相互作用试验检验手册》标准,对本院1999年至2007年间共33871例精液,采用北京伟力彩色精子质量检测仪进行检测,并对每一年度精液常规与运动参数等项进行比较。结果1999年至2007年每年的精液质量比较中,年龄、精液量、液化时间、pH值之间无明显差别(P>0.05);而其他参数,如活动率、A级比例、B级比例及相关动态参数(包括运动的前向性(STR)、直线性(LIN)及摆动性 ...
曹晓丽, 陈丽姣
doaj  

Tree mycorrhizal associations regulate relationships between plant and microbial communities and soil organic carbon stocks at local scales in a temperate forest

open access: yesFunctional Ecology, Volume 39, Issue 6, Page 1550-1566, June 2025.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Forests store substantial amounts of soil organic carbon (SOC), but SOC stocks differ strongly between forest ecosystems dominated by arbuscular mycorrhizal (AM) or ectomycorrhizal (EcM) fungi.
Mengxu Zhang   +10 more
wiley   +1 more source

不育男性精液白细胞增高对精子质量影响临床研究

open access: yesZhongguo shiyan zhenduanxue, 2015
精液是由5%的精子和95%精浆构成的复合液,主要为睾丸、附睾、精囊、前列腺、尿道球腺分泌的液体。精子由睾丸产生,是生殖细胞经一系列有丝分裂形成的,在附睾中未成熟的精子最终形成有动力的精子,整个过程需要70天。精浆的化学成分十分复杂,包含各种蛋白、酶类、激素、微量金属元素等,是运送精子的载体,并为精子提供存活所需的能量和营养物质[1,2]。精液中有形成分除精子外,尚含少量白细胞(
苏春霞   +7 more
doaj  

单精子冷冻和常规冷冻对显微取精患者的胚胎培养及妊娠影响的比较

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2023
目的比较单精子冷冻和常规冷冻对显微取精患者的胚胎培养及妊娠影响。方法回顾性分析自2018年1月至2021年12月于中山大学附属第六医院生殖医学研究中心行显微镜取精术患者的临床资料,行单精子冷冻共39例307枚成熟卵子为单精子冷冻组,通过SPSS统计软件倾向性评分匹配女方基本助孕信息1:1匹配选择对照组,为常规冷冻组,共410枚成熟卵子,分析单精子冷冻与常规冷冻两组的受精、胚胎培养及移植后妊娠情况。结果单精子冷冻组和常规冷冻组的年龄、体质量指数(BMI)、不孕年限、基础基础卵泡刺激素(FSH ...
李婷婷, 刘贵华, 张靖, 孙桂花
doaj  

New Method for Major Genetic Factors Rapid Detection of Non-obstructive Azoospermia and Oligospermia [PDF]

open access: yes, 2015
研究目的:建立一种基于实时荧光PCR(Real-timePCR)平台的检测新技术,能够在一个反应管内快速准确地同时检测克氏综合征与Y染色体微缺失。从而建立一种廉价、易行、高通量的针对非梗阻性无精少精症的主要遗传因素检测新方法,为男性不育的科学治疗与预后提供有效的指导工具。以多重实时荧光PCR技术在克氏综合征与Y染色体微缺失检测中的临床应用评估。并探讨厦门地区克氏综合征与Y染色体微缺失发病情况。 研究方法:分别针对Y染色体上ZFY、AZFa、AZFb ...
劉恬怡
core  

A N–CoSe/CoSe2–C@Cu hierarchical architecture as a current collector‐integrated anode for potassium‐ion batteries

open access: yesRare Metals, Volume 43, Issue 8, Page 3702-3712, August 2024.
Graphical abstract AbstractThe highly reversible insertion/extraction of large‐radius K+ into electrode materials remains a tough goal, especially for conversion‐type materials. Herein, we design a current collector‐integrated electrode (N–CoSe/CoSe2–C@Cu) as an advanced anode for potassium‐ion battery (PIBs).
Zi‐Jie Mu   +9 more
wiley   +1 more source

季节变化与精子参数、精浆果糖、中性α-糖苷酶关系探讨

open access: yesZhongguo shiyan zhenduanxue, 2007
目的探讨季节变化与精子参数、精浆果糖、中性α-糖苷酶的关系。方法采用精子形态检测系统下人工修正方法进行精子形态分析。采用精子质量检测系统进行精子密度、活力分析。精浆果糖含量、中性α-糖苷酶采用分光光度比色法测定。根据季节变化,结合本地实际情况分为四组:3-5月组,6-8月组,9-11月组,12-2月组。结果平均精子密度在3-5月组最高,9-11月组最低,9-11月组精子密度显著低于3-5月组 ...
李付彪   +5 more
doaj  

Effects and mechanisms of polychlorinated biphenyls on mouse epididymis [PDF]

open access: yes, 2011
多氯联苯(Polychlorinatedbiphenyls,PCBs)是最难以降解的持久性有机污染物之一。有关PCB的生殖毒性效应及机制已开展了较多的研究,但PCB对附睾的毒性效应及机制还不清楚。本研究以C57BL/6品系青春期雄性小鼠为研究对象,以商品化的Aroclor1254为PCB代表,研究环境水平的PCB暴露(0.5、5、50和500μg/kg)对附睾的毒性效应及机制。 青春期雄性小鼠在Aroclor1254暴露50天后,其体重、睾丸和附睾重量没有显著性变化,精子密度 ...
蔡嘉力
core  

Biological activity and food application of carboxymethyl pachymaran [PDF]

open access: yes
Carboxymethyl pachymaran (CMP) is a carboxymethylated modification product of the water-insoluble polysaccharides from Poria cocos. It has many biological activities such as immune regulation, antibacterial, anti-inflammatory, anti-tumor, anti-oxidation,
DAI Xinwen   +4 more
core   +1 more source

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