Results 31 to 40 of about 409,033 (158)
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 3, Page 376-384, March 2026.ABSTRACT Objective To investigate whether combining abnormal morphological features observed on ultrasound in live pregnancies that ended in a first‐trimester miscarriage can predict an abnormal karyotype. Methods This retrospective observational cohort study was conducted at the early‐pregnancy assessment unit at University College London Hospital ...
T. Setty +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2017 基于室内人工模拟降雨试验方法，选取细沟密度、细沟割裂度和细沟宽深比3个细沟形态指标，对晋西黄绵土坡面细沟形态演变特征进行分析，并探讨了降雨条件下不同坡长坡面细沟形态对产流产沙规律的影响。结果表明，晋西黄绵土坡面细沟形态演变过程为先形成跌坎，跌坎贯穿发育为细沟，再形成细沟网，最后发生细沟崩塌。细沟密度与割裂度均随坡长和雨强的增大而增大，细沟宽深比随二者的增大而减小；坡长对细沟密度和细沟宽深比的影响较雨强敏感，而降雨强度对细沟割裂度的影响更加敏感。坡面平均产流率随坡长的变化可用线性函数描述（R2＞0.95），
裴冠博, 龚冬琴, 付兴涛
doaj
Zhongguo shiyan zhenduanxue, 2020 目的采用体外培养宫颈腺癌Hela细胞,观察莪术联合放疗对宫颈腺癌Hela细胞增殖、凋亡的影响。方法采用CCK-8法检测不同浓度莪术油注射液对Hela细胞生长的抑制作用。设立空白对照组、单药组、6Gy照射组、10Gy照射组、药物+6Gy照射组、药物+10Gy照射组,CCK-8法检测莪术油联合放疗对Hela细胞的抑制作用,流式细胞术检测莪术油联合放疗对Hela细胞凋亡的影响。结果莪术油作用后,Hela细胞生长受到抑制,且细胞抑制率与药物浓度显著相关 ...
赵悦辰 +6 more
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Risk of pre‐eclampsia according to gestational age across three decades: population‐based study
Ultrasound in Obstetrics &Gynecology, Volume 67, Issue 2, Page 155-161, February 2026.ABSTRACT Objectives To determine the risk of pre‐eclampsia in ongoing pregnancies according to gestational age. We also studied whether the gestational‐age‐specific risks of developing pre‐eclampsia have changed over recent decades. Methods This was a population‐based study using data from the Medical Birth Registry of Norway.
C. Haavaldsen, O. Thomas, A. Eskild
wiley +1 more source
, 2017 高速列车的头尾车外形对气动噪声具有重要的影响.工程实践中随着车速的增加，车辆头部越来越细长，日本高速磁悬浮列车实践中甚至出现了具有极端长细比的头部形状.本文以讨论头型长细比对列车气动噪声的影响规律为出发点，应用非线性声学求解器(NLAS)和FW–H声学比拟法的混合算法，在3种运行速度下对基于CRH380A高速列车头型概化的4种不同头型长细比的模型车的气动噪声进行了数值模拟.给出了不同头型长细比列车的流场特征、气动阻力和气动噪声.结果表明，列车的气动总阻力随头型长细比的增大而减小 ...
莫晃锐, 安翼, 刘青泉
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野生动物学报, 2014 以麋鹿、獐、马鹿、梅花鹿、白唇鹿和狍6种鹿科动物的冬季上毛为研究对象,通过对背中部上毛长度、细度、髓质指数、鳞片长宽比、横向单位长度(200 μm)的鳞片数量等性状指标的比较结果表明:这6种鹿科动物的冬季上毛细度在300～800 μm之间,上毛长度在37～65 mm之间,髓质指数在96.2%～97.5%之间,横向单位长度(200 μm)的鳞片数量在2.5～3.8个之间,鳞片长宽比在0.2～0.6之间。其中白唇鹿的上毛细度在600 μm以上,高于其他5种动物; 马鹿的鳞片长宽比为0.5以上 ...
陈 辰 张 伟
doaj
Veterinary Dermatology, Volume 37, Issue 1, Page 148-160, February 2026.Background: The antibacterial efficacy of chlorhexidine shampoo is directly affected by formulation and bathing factors. Hypothesis/Objective: To evaluate the in vitro antibacterial efficacy of chlorhexidine‐containing shampoos at various dilutions and to compare their lathering ability.
Emily E. Binversie +2 more
wiley +1 more source
, 1999 本文用常规方法培养细胞，用环境扫描电镜观察细胞在微载体上的生长过程，包括细胞贴附阶段和生长增殖阶段细胞形貌及细胞数目变化。考察了接种密度、血清浓度、葡萄糖浓度等培养条件对细胞生长过程的影响，外加贴壁因子对细胞贴附铺展过程的影响。随接种密度的增大，细胞延迟期缩短，细胞比生长速率下降加快，细胞长满微载体表面所用的时间缩短，在没有接种上细胞的空微载体比例足够小的情况下，细胞的终密度基本相同。血清浓度通过对细胞贴附率的影响直接影响整个生长过程。外源纤粘连蛋白和层粘连蛋白在微载体表面的吸附使细胞铺展速度加快 ...
姜蕾
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Veterinary Dermatology, Volume 37, Issue 1, Page 103-110, February 2026.Background: Otitis externa with secondary bacterial or yeast infection is a common problem in small animal practice. Cold physical plasma (CPP) has been reported to have antimicrobial activity in vitro. Results: Ears treated additionally with CPP showed lower otic scores after 21 days compared to nontreated ears, although this difference was not ...
Ralf S. Mueller, Cosima Bouassiba
wiley +1 more source
, 2012 本文研究了柔性细长体运动的动力学模型。细长柔性体在科学研究、工程和国防领域等都有广泛的应用，由于系统的复杂性，细长柔性体的运动稳定性、操纵性、安全性和和控制特性在使用之前都不容易进行完全的评估。本文建立了细长柔性体动力学模型，基于该模型建立了三维的计算仿真软件，并通过与实测数据的对比 ...
彭世镠, 郭宗凯
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