Results 31 to 40 of about 1,061,235 (143)

TRAIL分子胞外区基因工程蛋白的制备与鉴定

open access: yesZhongguo shiyan zhenduanxue, 2003
目的 制备人TRAIL配体胞外区基因工程蛋白。方法 应用RT PCR技术从激活的人外周血淋巴细胞总RNA中扩增TRAIL配体胞外区cDNA ,克隆入PCR2 .1 载体 ,测序验证后用基因重组法构建了TRAIL配体胞外区和组氨酸盒的原核表达质粒pQE hTRAIL。将重组质粒转入大肠杆菌M15中表达 ,经 1mmol LIPTG在 37℃条件下诱导 4h ,亲和层析柱纯化。用SDS -PAGE电泳和Westernblot鉴定表达产物。结果 所表达融合蛋白为人TRAIL配体胞外区分子 ,分子量 30kD ...
路丽明   +8 more
doaj  

骨肉瘤细胞外泌体激活肺组织成纤维细胞炎性信号通路

open access: yesZhongshan Daxue xuebao. Yixue kexue ban, 2020
目的本研究旨在研究骨肉瘤细胞来源外泌体对靶器官微环境的调控作用及其分子机制。方法提取骨肉瘤细胞143B外泌体并鉴定,通过PKH26荧光染色后经尾静脉注入裸鼠体内,24 h后提取肝、脾、肺、肾及脑组织,荧光显微镜下计数不同视野红色荧光数量;通过免疫荧光检测不同类型细胞中外泌体摄取情况;143B外泌体与人肺成纤维细胞共培养,荧光显微镜检测摄取情况,进一步利用qPCR检测炎性因子IL-1β、IL-6及TNF-α表达水平,通过蛋白印迹法检测炎性信号通路NF-κB通路p-p65和MAPK通路p-ERK及p ...
谢显彪   +7 more
doaj  

孔雀鱼胚心的体外培养

open access: yes, 2001
以卵胎生方式繁殖的孔雀鱼为材料,通过酶消化或机械方法脱去卵壳,经显微操作从发育早期的40个胚胎中挑取胚心进行体外培养.这些鱼的胚心在体外维持搏动达4周的占80%,其中搏动时间最长的有142 d.利用鱼的胚体透明、可直接观察到其体内心脏搏动及血液循环等有利条件,同时对体外培养的胚心血管中血细胞颜色的变化及随心搏运动的现象做了观察分析.实现了孔雀鱼胚胎心的体外培养 ...
张奇亚,李正秋,桂建芳
core  

Unraveling Student Anxiety in EFL Classrooms in China: The Roles of the Classroom Environment and Control–Value Appraisals

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT In this study, control–value theory (CVT) was used to investigate how students’ perceptions of the classroom environment shape their anxiety in the context of English as a foreign language (EFL) learning through the mediating effects of control and intrinsic value appraisals.
Quan Qian, Xianhan Huang
wiley   +1 more source

184例体外循环下心内直视术的护理配合

open access: yesHuli yanjiu, 2008
摘要: (免费在线浏览)体外循环是将回心的静脉血从上、下腔静脉或右心房引出体外,在人工心肺机进行氧合和排出二氧化碳后,再由血泵输回体内动脉的一种血液循环方法。体外循环下心内直视手术是治疗先天性心脏病、风湿性心脏病和冠心病的主要方法之一。体外循环下心内直视手术的特点是专业性强、手术步骤复杂、病人危险性大,因此护理人员手术前的准备和手术中与手术医生之间的配合对于手术成功起到至关重要的作用。本院在2007年1月―2007年12月对184例心脏病人施行了体外循环下心内直视手术,效果满意 ...
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doaj  

ECMO国内应用现状

open access: yesZhongguo shiyan zhenduanxue, 2020
体外膜肺氧合技术(Extracorporeal Membrane Oxygenation,ECMO),作为一种呼吸和心脏功能的支持技术,出现于1970s[1]。由传统的心肺转流(cardiopulmonary bypass,CPB)技术发展而来。ECMO是体外生命支持系统的其中一种表现形式,它的基础是体外循环,却和体外循环相比具有很多优势,它的功能不止局限于循环支持,还可以支持呼吸衰竭患者的呼吸功能 ...
赖冰洁   +4 more
doaj  

雷达传感器外壳

open access: yes, 2014
1.本外观设计产品的名称:雷达传感器外壳。2.本外观设计产品的用途:本外观设计产品用于交通和工业领域等多种雷达探测设备。3.本外观设计产品的设计要点:在于整体形状。4.最能表明本外观设计设计要点的图片或照片 ...
毕欣, 杜劲松
core  

Iteratively Designing a Theory‐Driven Gamified Morphological Awareness Intervention to Improve EFL Learners’ Reading Performance and Engagement

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Gamification has been increasingly implemented for language learning purposes across the globe. However, there remains unknown regarding how the change in gamification design might maximize students’ language learning outcomes and engagement.
Shen Qiao   +2 more
wiley   +1 more source

Vocabulary Strategy Instruction in the Argentine EFL Context: Teachers’ Perspectives and Practices

open access: yesInternational Journal of Applied Linguistics, EarlyView.
ABSTRACT Despite extensive research on vocabulary strategy instruction (VSI), little has been known about teachers’ perspectives on how it is understood and implemented in practice. This study investigated Argentinian EFL teachers’ priorities in vocabulary instruction, their perceived knowledge of learner strategies for spoken vocabulary, and factors ...
Isobel Kai‐Hui Wang, Andrew D. Cohen
wiley   +1 more source

血浆外泌体miR-21对胃癌细胞药物敏感性的影响

open access: yesZhongguo shiyan zhenduanxue, 2022
目的 探索外泌体来源的miR-21作为胃癌奥沙利铂化疗过程中评价药物敏感性生物标志物的价值。方法透射电镜观察外泌体的形态;构建SGC7901奥沙利铂耐药细胞株,并利用RT-qPCR检测耐药细胞和亲本细胞中miR-21的表达水平;CCK8检测miR-21对SGC7901耐药细胞株增殖抑制率的影响;Western blot检测外泌体的标记蛋白;使用受试者工作特征曲线(ROC)分析奥沙利铂治疗胃癌的过程中miR-21评估药物敏感性的价值。结果miR-21过表达后,亲本细胞对奥沙利铂的敏感性由IC50 16 ...
杜沛, 李婷, 文雯
doaj  

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