Results 11 to 20 of about 6,122 (148)

三种仪器测量中央角膜厚度的比较 [PDF]

Zhongshan Daxue xuebao. Yixue kexue ban, 2006
[目的]探讨光学相干断层扫描仪（OCT）、超声波角膜测厚仪及OrbscanⅡ角膜地形图/角膜测厚系统（OrbscanⅡ系统）测量中央角膜厚度（CCT）的差异及测量的可重复性.[方法]分别用OCT、超声波角膜测厚仪和OrbscanⅡ系统测量近视患者34例（68只眼）的CCT并对测量值进行比较,用相关分析方法分析不同仪器间测量值的相关性;随机选择15例（30只眼）用三种仪器依次重复测量中央角膜厚度3次,采用方差分析方法分析3种仪器重复测量值的方差.[结果]OCT、超声波角膜测厚仪 ...
曾阳发, 刘杏, 黄晶晶, 郑小萍, 黄国富, 钟毅敏, 毛真   +6 more
doaj   +2 more sources

Effect of Ultrasonic Treatment on Structure and Antioxidant Activity of Channa argus Short Peptide-Zinc(超声波对乌鳢短肽-锌结构及抗氧化性的影响) [PDF]

Shipin kexue jishu xuebao, 2020
In order to shorten the reaction time and improve the stability of Channa argus short peptide-zinc (CASP-Zn), the ultrasonic technology was employed to analyze the effects of different time (0,5, 10,5, 30,5, 60,5, 90,0min) and different ultrasonic power (
WANG Jingyu(汪婧瑜), ZHANG Yehui(张业辉), RUAN Qijun(阮奇珺), ZHANG Yousheng(张友胜), LIU Xueming(刘学铭), CHEN Zhiyi(陈智毅), CHENG Jingrong(程镜蓉), WANG Xuping(王旭苹)   +7 more
doaj   +1 more source

Definition and sonographic reporting system for Cesarean scar pregnancy in early gestation: modified Delphi method

Ultrasound in Obstetrics &Gynecology, Volume 59, Issue 4, Page 437-449, April 2022., 2022
ABSTRACT Objective To develop a standardized sonographic evaluation and reporting system for Cesarean scar pregnancy (CSP) in the first trimester, for use by both general gynecology and expert clinics. Methods A modified Delphi procedure was carried out, in which 28 international experts in obstetric and gynecological ultrasonography were invited to ...
I. P. M. Jordans, C. Verberkt, R. A. De Leeuw, C. M. Bilardo, T. Van Den Bosch, T. Bourne, H. A. M. Brölmann, M. Dueholm, W. J. K. Hehenkamp, N. Jastrow, D. Jurkovic, A. Kaelin Agten, R. Mashiach, O. Naji, E. Pajkrt, D. Timmerman, O. Vikhareva, L. F. Van Der Voet, J. A. F. Huirne   +18 more
wiley   +1 more source

First‐trimester ultrasound detection of fetal heart anomalies: systematic review and meta‐analysis

Ultrasound in Obstetrics &Gynecology, Volume 59, Issue 1, Page 11-25, January 2022., 2022
ABSTRACT Objectives To determine the diagnostic accuracy of ultrasound at 11–14 weeks' gestation in the detection of fetal cardiac abnormalities and to evaluate factors that impact the detection rate. Methods This was a systematic review of studies evaluating the diagnostic accuracy of ultrasound in the detection of fetal cardiac anomalies at 11–14 ...
J. N. Karim, E. Bradburn, N. Roberts, A. T. Papageorghiou, for the ACCEPTS study, Aris T. Papageorghiou, Zarko Alfirevic, Trish Chudleigh, Hilary Goodman, Christos Ioannou, Heather Longworth, Jehan N. Karim, Kypros H. Nicolaides, Pranav Pandya, Gordon Smith, Basky Thilaganathan, Jim Thornton, Oliver Rivero‐Arias, Helen Campbell, Ed Juszczak, Louise Linsell, Ed Wilson, Lisa Hinton, Jane Fisher, Elizabeth Duff, Anne Rhodes, Gil Yaz   +26 more
wiley   +1 more source

Value of cervical electrical impedance spectroscopy to predict spontaneous preterm delivery in asymptomatic women: the ECCLIPPx prospective cohort study

Ultrasound in Obstetrics &Gynecology, Volume 58, Issue 2, Page 293-302, August 2021., 2021
ABSTRACT Objectives Preterm birth (PTB) accounts for two‐thirds of deaths of structurally normal babies and is associated with substantial lifetime healthcare costs. Prevention of PTB remains limited by the modest accuracy of prediction methods, namely transvaginal ultrasound (TVS) cervical length (CL) measurement and quantitative cervicovaginal fetal ...
D. O. C. Anumba, V. Stern, J. T. Healey, S. Dixon, B. H. Brown   +4 more
wiley   +1 more source

Design and Research of Production Line of Continuous Cyclic Ultrasonic Extraction(连续循环超声波提取生产线的设计和研究) [PDF]

Shipin kexue jishu xuebao, 2014
The equipment structure and characteristics of ultrasonic extraction circulation were intro-duced based on the advantages and disadvantages of domestic ultrasonic extraction equipment.
LIU Yude(刘玉德), WAN Luming(万璐明), ZHANG Yuan(张 媛), SHI Xuezhi(石学智), WANG Tao(王 涛)   +4 more
doaj   +1 more source

油茶籽饼中茶皂苷的超声-微波 辅助法提取工艺优化Optimization of ultrasound-microwave assisted extraction of tea saponins from oil-tea camellia seed cake

Zhongguo youzhi, 2023
为提高茶皂苷的提取率，扩大茶皂苷的应用范围，以脱脂油茶籽饼为原料，采用超声-微波辅助法提取茶皂苷。以油茶皂苷提取率为考察指标，在单因素试验的基础上，采用Plackett-Burman试验设计筛选出具有显著影响的试验因素，再通过响应面法对茶皂苷提取工艺进行优化。另外，将超声-微波辅助法提取茶皂苷的工艺与超声辅助法和微波辅助法提取工艺进行了对比。结果表明：超声-微波辅助法提取茶皂苷的最佳工艺条件为乙醇体积分数59%、料液比1∶ 12、提取液pH 7、超声功率475 W、超声时间4 min、超声工作2 ...
司喜艳，王香玉，皇甫新燕，王琦，赵仁勇SI Xiyan, WANG Xiangyu, HUANGFU Xinyan, WANG Qi, ZHAO Renyong
doaj   +1 more source

Learning curve for detection of pelvic parts of ureters by transvaginal sonography: feasibility study

Ultrasound in Obstetrics &Gynecology, Volume 55, Issue 2, Page 264-268, February 2020., 2020
ABSTRACT Objective To investigate how many examinations it takes to be able to identify the pelvic parts of the ureters on transvaginal sonography (TVS). Methods This was a prospective study including consecutive women attending a gynecological outpatient clinic in a tertiary referral setting.
M. K. Aas‐Eng, M. Salama, U. Sevelda, C. Ruesch, Z. Nemeth, G. Hudelist   +5 more
wiley   +1 more source

Study on Water Evaporation of Ultrasonic Vacuum Freeze Drying Yogurt(超声波强化真空冷冻干燥酸奶中水分蒸发的研究) [PDF]

Shipin kexue jishu xuebao, 2014
In this study, ultrasonic and vacuum freeze drying were combined to dry yogurt. Compared with the vacuum freeze drying, the effects of ultrasonic time, power, and pulse on water evaporation and drying time of yogurt were determined. Meanwhile, the drying
YANG Ju-fang(杨菊芳), ZHOU Zheng(周 正), WU Hao(吴 昊), Zha Meng-yin(查梦吟), CHEN Cun-she(陈存社)   +4 more
doaj   +1 more source

Analysis on flow characteristics and aerodynamic-force-induced vibration of supersonic rocket-sled

Xibei Gongye Daxue Xuebao, 2022
目前, 火箭橇试验是飞行器空气动力学重要试验手段, 然而强烈的地面与轨道干扰会影响试验的精度, 甚至导致试验失败。采用尺度自适应SAS方法和基于铺层算法的动网格技术对不同马赫数下的超声速火箭橇滑行过程进行数值模拟, 探究了超声速火箭橇的气动力致振机理。采用了数值风洞模拟方法对超声速火箭橇无限空间绕流和仅包含地面的橇体绕流进行仿真, 分析了不同环境条件下的激波特征。结果表明: 超声速火箭橇的头激波传播至轨道和地面时会发生激波反射, 反射激波的存在会导致超声速火箭橇产生升力, 并带来阻力的略微增加 ...
YU Yuanyuan, WANG Fangyuan, WANG Bin, SUN Jianhong, XU Changyue, SUN Zhi   +5 more
doaj   +1 more source