Results 21 to 30 of about 9,644 (161)
Research progress on effects of PM2.5 exposure during pregnancy on maternal and infant thyroid function [PDF]
, 2022 Ambient air pollution has become a widespread global public health problem. As one of the main components of ambient air pollution, fine particulate matter (PM2.5), with its small diameter and large surface area, can carry a variety of toxic substances ...
Chenchen WANG +3 more
core +2 more sources
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 3, Page 272-282, March 2026.ABSTRACT Objective Complete hydatidiform mole and coexisting normal fetus (CHMCF) is a rare condition for which there is significant heterogeneity in diagnosis, counseling and management of complications. The objective of this study was to summarize the prevalence of clinical outcomes in reported cases of CHMCF.
N. Salmeri +8 more
wiley +1 more source
贵州省黔南区不同侵蚀性雨型条件下生物措施对坡面产流产沙的响应
Shuitu Baochi Xuebao, 2020 为探讨不同降雨条件下的生物措施对坡面产流产沙特征的影响，分析了贵州省黔南自治州云雾水土保持监测站2014—2017年4年6个小区104次侵蚀性降雨下的实测产流产沙数据。结果表明：（1）侵蚀性降雨按历时、雨强和雨量可分为3类，包括A雨型（中历时、中雨强、中雨量），B雨型（长历时、小雨强、大雨量），C雨型（短历时、大雨强、小雨量）。C雨型为引起区域水土流失的主要雨型。（2）较坡耕地而言，A雨型和C雨型条件下减流量均呈水平阶整地+经果林 > 水保林 > 人工草地 > 自然恢复草地 > 经果林的趋势 ...
黄凯 +5 more
doaj
Governance of Climate‐Induced Relocation in the US: An Exploration of Institutional Complexity
Review of Policy Research, Volume 43, Issue 2, March 2026.ABSTRACT Climate change has and will continue to have a profound effect on both individuals and the communities in which they reside. A pressing question is how communities forced to confront climate‐induced catastrophe—including both rapid and slow‐onset hazards—undertake the decision of how and when to relocate, particularly given the multiple scales
Christopher S. Galik, Brad A. Johnson
wiley +1 more source
优化精液处理中的密度梯度离心法以提高受精结局的探讨 [PDF]
目的本研究旨在改进生殖男科领域现有的精液处理方法，特别是针对双层密度梯度法中的300 ×g 20 min处理条件，以提高受精结局。方法收集2020年7月和9月以及2022年3月和5月在中山大学附属第六医院生殖医学中心进行辅助生殖助孕的1 623例患者的精液标本进行实验。预实验中，比较四种不同的双层密度梯度方法（200 ×g 10 min、200 ×g 20 min、300 ×g 10 min和300 ×g 20 min）处理后标本的精子DNA碎片率和回收率。然后，筛选出一种最优的方法作为新方法 ...
孙桂花 +3 more
core +4 more sources
Zhongguo shiyan zhenduanxue, 2008 目的研究肝素结合性表皮生长因子（HB-EGF）在早孕人工流产（正常早孕）及早孕自然流产（早期流产）绒毛组织中的表达是否存在差异,并进一步探讨HB-EGF在早期流产病因学中的作用。方法采用免疫组化链霉菌抗生物素-过氧化物酶（SP）连接法检测正常早孕妇女及早期流产患者绒毛组织中HB-EGF的表达。结果正常早孕组与自然流产组绒毛组织内均有HB-EGF表达,各组HB-EGF均表达于绒毛组织滋养细胞细胞膜和细胞浆内。灰度测定与对照组比较,自然流产组绒毛组织内HB-EGF表达明显减弱（t=2.48,P=0.02 ...
李巍 +4 more
doaj
, 2019 生物钟是生物体对环境长期适应而形成的自主计时机制。生物钟基因调节人体多项生理活动，比如睡眠-觉醒、激素分泌、细胞代谢和免疫调节等，其目标是使细胞、组织以及器官能够有序、协同作用，并呈现明显的节律。女性生殖功能受下丘脑-垂体-卵巢轴的昼夜节律调控。由于外界因素引起的昼夜节律中断与女性各种生殖功能障碍的发生发展有关，包括月经失调、流产和生育力下降等。本文旨在从月经周期中卵泡发育的调控、排卵 ...
徐艳文
core
Conservative surgery in stage I placental site trophoblastic tumor: a report of 10 cases and literature review [PDF]
, 2023 Background and purpose: Placental site trophoblastic tumor (PSTT) is a rare type of malignant tumor. Because of its unique mode of invasion in the uterus and its insensitivity to chemotherapy, total hysterectomy is the primary recommendation. The purpose
CHEN Jinjuan, WANG Xingran, LI Wenzhi, CHENG Yu, SUN Yihua, TAO Xiang, MA Fenghua, SUN Li, ZHAO Hongbo, LU Xin
core +1 more source
Rare Metals, Volume 45, Issue 2, February 2026.ABSTRACT Photocatalytic molecular oxygen (O2) activation provides a sustainable approach to produce singlet oxygen (1O2) for organic contaminants detoxification. However, the charge carriers‐involved pathway usually suffers from unsatisfactory 1O2 production efficiency owing to energy loss caused by photogenerated hole‐mediated superoxide species (•O2−
Yan‐Biao Shi +8 more
wiley +1 more source