资源类型

期刊论文 11

年份

2022 1

2021 1

2020 1

2017 1

2016 1

2015 2

2012 1

2008 2

2006 1

展开 ︾

关键词

环介导等温扩增 2

COVID-19 1

SARS-CoV-2 1

人类免疫缺陷病毒(HIV) 1

侧流免疫检测试纸条 1

养护和管理 1

动力特性 1

即时检测 1

响应 1

强迫振动 1

微流控 1

微生物资源,分子鉴定,核酸扩增技术,基因芯片技术,高通量测序技术,微生物数据库 1

智能手机 1

核酸检测 1

海洋渔业碳汇 1

病毒载量 1

碳汇扩增 1

碳汇渔业 1

等温扩增 1

展开 ︾

检索范围:

排序: 展示方式:

海洋渔业碳汇及其扩增战略

唐启升,刘 慧

《中国工程科学》 2016年 第18卷 第3期   页码 68-73 doi: 10.15302/J-SSCAE-2016.03.011

摘要:

本文介绍了海洋渔业碳汇和碳汇渔业的定义、研究现状、问题及技术需求。与林业碳汇比较结果表明,海洋渔业碳汇不仅有高效的特性,还有扩增的潜质。为此,提出海洋渔业碳汇扩增对策建议,主要包括:查明我国海洋渔业碳汇潜力及动态机制;大力发展以海水养殖为主体的碳汇渔业;加强近海自然碳汇及其环境的养护和管理;实施相应的渔业碳汇扩增工程建设,促进环境友好型水产养殖业发展。

关键词: 海洋渔业碳汇     碳汇渔业     碳汇扩增     养护和管理     贝藻养殖    

Using RAPD in genotyping and transmission detection

ZHANG Tiejun, ZHOU Xiaoming, ZHANG Tao, YU Shunzhang, JIANG Qingwu, CHEN Yue

《医学前沿(英文)》 2008年 第2卷 第3期   页码 269-275 doi: 10.1007/s11684-008-0051-9

摘要: The aim of this paper is to develop an applicable Random Amplified Polymorphic DNAs (RAPD) method for genotyping strain, and discuss the possibility of using the RAPD method to trace strain transmission route. Four different pretreatment methods were used on the genomic DNA component, and the best adaptive extract method was selected for RAPD. Different RAPD primers sequence was used for amplification and their differentiating capabilities for strains were compared. Applicable RAPD primer was selected for genotyping and then applied into transmission detection. The results show that the so called cetyltrimethylammonium bromide (CTAB) method for extracting genomic DNA could give integrated genomic DNA and give out relatively better RAPD fingerprint maps, subsequently, using selected RAPD primer could give out a group of amplification polymerase chain reaction bands. The fingerprint maps from different strains were distinctive. Some main segments were common to all the strains tested. Some segments were different among the strains. According to the fingerprint maps and similarity index of different isolates, isolates from a pair of sex-partners were very similar. Based on these findings, the best extracting method and suitable RAPD primer were chosen. The RAPD fingerprint maps could type effectively and could be used as an additional approach in molecular epidemiology for tracing infection sources.

关键词: amplification polymerase     CTAB     sequence     cetyltrimethylammonium     RAPD    

智能手机成像的晶片上基于逆转录环介导等温扩增(RT-LAMP)技术的全血中HIV-1检测 Article

Gregory L. Damhorst,Carlos Duarte-Guevara,Weili Chen,Tanmay Ghonge,Brian T. Cunningham,Rashid Bashir

《工程(英文)》 2015年 第1卷 第3期   页码 324-335 doi: 10.15302/J-ENG-2015072

摘要:

病毒载量测量对于人类免疫缺陷病毒 (HIV) 阳性患者长期临床护理来说是一个必不可少的工具。然而,考虑到病毒载量测量所需的仪器体积、成本和操作的复杂性,在医疗基础设施较差的偏远地区 (尤其是在被HIV感染人群比例较高的地区) 普及标准的病毒载量测量仪器是较为困难的。为提高该检测方法的普及性,人们已经开始开发可以进行即时检测的病毒载量检测平台,然而尚没有解决办法能够同时满足低成本、便携、易于操作等多种实际要求。本文通过运用微流体和微型硅晶片平台,对经过最低程度处理的含有HIV的全血样本进行了逆转录环介导等温扩增 (RT-LAMP),并利用智能手机进行了荧光检测。集成实验检测结果表明,一滴约60 nL的反应液滴中仅有的3个病毒依然可以通过RT-LAMP技术被检测到,这相当于每微升全血样品中只有670个病毒。该技术在数字化RT-LAMP方法上具有重要意义,扩展该技术能够实现对HIV阳性患者在临床护理中采集指血进行病毒载量检测。研究结果显示,病毒载量检测过程所需的各个步骤,从血滴的准备到RT-LAMP反应的成像,都可以集成为晶片实验并且可以和移动设备兼容。

关键词: 人类免疫缺陷病毒(HIV)     病毒载量     环介导等温扩增     智能手机     即时检测    

移动荷载作用下三塔悬索桥的强迫振动研究

冯兆祥,陈亮,缪长青

《中国工程科学》 2012年 第14卷 第5期   页码 80-84

摘要:

针对泰州大桥开展结构动力特性计算,分析了不同移动速度以及不同移动荷载大小对于三塔两跨悬索桥结构动力响应的影响。结果表明,三塔两跨悬索桥的一阶竖弯振动基频约为0.08 Hz,远低于载重汽车的固有频率,不会形成共振条件。简单的移动荷载作用下三塔两跨连续支承悬索桥的内力、位移响应与同等静力荷载作用效果比较接近。移动荷载的质量越大、速度越大,结构的内力、位移响应就越大,并与车重呈近似正比例关系。结构内力、位移的荷载放大系数不随移动荷载质量的大小而改变。

关键词: 动力特性     强迫振动     响应     荷载放大系数    

Experimental Study on the Piezoelectric Prestage Driver of Electrohydraulic Servo Valves

CHENG Guang-ming, SHEN Chuan-liang, YANG Zhi-gang

《机械工程前沿(英文)》 2006年 第1卷 第1期   页码 56-59 doi: 10.1007/s11465-005-0017-4

摘要:

A piezoelectric actuated prestage driver of hydraulic servo valves for the low-frequency response of electrohydraulic servo valve electromagnetic prestage driver was presented. The new driver was driven by piezoelectric multilayer actuators. The displacement of a piezoelectric multilayer actuator was amplified by a flexure-hinged amplifier based on the principles of triangle amplification. Static and dynamic characteristics were tested on the model machine. The characteristics of good linearity, high resolution, and high-frequency response were approved. The natural frequency reached 1.201 kHz using finite element analysis, and the practice measurement result was 1 kHz.

关键词: flexure-hinged amplifier     kHz     amplification     high-frequency     electromagnetic    

High-level expression of recombinant IgG1 by CHO K1 platform

Ningning Xu, Jianfa Ou, Al-Karim (Al) Gilani, Lufang Zhou, Margaret Liu

《化学科学与工程前沿(英文)》 2015年 第9卷 第3期   页码 376-380 doi: 10.1007/s11705-015-1531-5

摘要: The Chinese Hamster Ovary (CHO K1) cell was used to express a targeted anti-cancer monoclonal antibody by optimizing the platform of the construction of production cell line in this study. The adherent CHO K1 was first adapted to suspension culture in chemical defined medium. Then the glutamine synthetase (GS) vector was applied to construct a single plasmid to overexpress a monoclonal antibody IgG1. Post transfection, the production of cell pool was optimized by glutamine-free selection and amplification using various concentrations of methionine sulfoximine. The best cell pool of CHO K1/IgG1 was used to screen the top single clone using the limiting dilution cloning. Finally, a high IgG1 production of 780 mg/L was obtained from a batch culture. This study demonstrated that the construction of high producing cell line, from gene to clone, could be completed within six month and the gene amplification improved protein production greatly.

关键词: Chinese hamster ovary (CHO)     monoclonal antibody     IgG1     amplification     cell line development    

Aptamer-coded DNA nanoparticles for targeted doxorubicin delivery using pH-sensitive spacer

Pengwei Zhang, Junxiao Ye, Ergang Liu, Lu Sun, Jiacheng Zhang, Seung Jin Lee, Junbo Gong, Huining He, Victor C. Yang

《化学科学与工程前沿(英文)》 2017年 第11卷 第4期   页码 529-536 doi: 10.1007/s11705-017-1645-z

摘要: An anticancer drug delivery system consisting of DNA nanoparticles synthesized by rolling circle amplification (RCA) was developed for prostate cancer membrane antigen (PSMA) targeted cancer therapy. The template of RCA was a DNA oligodeoxynucleotide coded with PSMA-targeted aptamer, drug-loading domain, primer binding site and pH-sensitive spacer. Anticancer drug doxorubicin, as the model drug, was loaded into the drug-loading domain (multiple GC-pair sequences) of the DNA nanoparticles by intercalation. Due to the integrated pH-sensitive spacers in the nanoparticles, in an acidic environment, the cumulative release of doxorubicin was far more than the cumulative release of the drug in the normal physiological environment. In cell uptake experiments, treated with doxorubicin loaded DNA nanoparticles, PSMA-positive C4-2 cells could take up more doxorubicin than PSMA-null PC-3 cells. The prepared DNA nanoparticles showed the potential as drug delivery system for PSMA targeting prostate cancer therapy.

关键词: aptamer     DNA nanoparticles     rolling circle amplification     doxorubicin     drug delivery     pH sensitive    

Observation of a higher JAK2 V617F homozygous mutated clone in polycythemia vera compared to essential thrombocythemia

LIU Hongxing, TONG Chunrong, CAI Peng, GU Jiangying, LIN Yuehui, TENG Wen, WANG He, ZHANG Ying, ZHU Ping

《医学前沿(英文)》 2008年 第2卷 第3期   页码 309-313 doi: 10.1007/s11684-008-0059-1

摘要: Single-tube bi-directional allele specific amplification (SB-ASA) and real-time quantitative polymerase chain reaction (RQ-PCR) assays were developed and performed for JAK2V617F detection on 40 polycythemia vera (PV) samples, 31 essential thrombocythemia (ET) samples, 40 acute leukemia samples, and 40 healthy control samples. Differences between detect limitations of the two assays and their influence on the mutation detection rate were analyzed. The results showed that in some samples, the JAK2V617F burden was as low as nearly 1%, and thus more JAK2V617F-positive samples were detected by RQ-PCR than by SB-ASA assay due to the former higher detect limitation. Mutation allele ratios in PV and ET samples and their relevance to biological characteristics were also analyzed. The results showed that the mutation allele ratio was 0.436 ± 0.261 in PV, higher than the 0.216 ± 0.207 in ET; percentage of certainly homozygous mutation carriers in PV was 40.54%, higher than the 10% in ET. However, statistical analysis showed no relevance between mutation allele burden and sex or age. Our result shows that the pathogenesis of PV and ET may be related to the mutation allele burden of JAK2V617F.

关键词: specific amplification     essential thrombocythemia     Single-tube bi-directional     JAK2V617F-positive     JAK2V617F detection    

微生物资源分子鉴定技术的研究进展

张羽,马爱进,高利芬,彭海,贾英民,孙宝国

《中国工程科学》 2021年 第23卷 第5期   页码 86-93 doi: 10.15302/J-SSCAE-2021.05.011

摘要:

微生物作为全世界分布最广且拥有量最多的生物资源,应用领域广泛,具有突出的经济价值和社会价值。以往虽已有众多微生物研究,但限于技术方法无法深入展开,随着微生物检测技术的不断发展,为微生物研究提供了新途径和新方法。本文总结了国内外微生物资源分子鉴定技术的发展及其应用情况,主要有脱氧核糖核酸(DNA)含量测定、核酸杂交技术、DNA 指纹图谱技术、核酸扩增技术、基因芯片技术和高通量测序技术等;梳理了现有微生物资源分子鉴定技术的优缺点;分析了微生物资源分子鉴定技术存在的问题,如依赖于实验室环境,实验结果的重现性、准确性不足,缺乏相应的微生物数据库。为促进我国微生物资源的保护和利用,研究建议,要继续加强对各鉴定技术的研究,建立具有自主知识产权的微生物资源鉴定平台,完善微生物资源数据库等。

关键词: 微生物资源,分子鉴定,核酸扩增技术,基因芯片技术,高通量测序技术,微生物数据库    

基于链置换环介导等温扩增的量子点纳米珠标记侧流免疫检测试纸条快速灵敏检测鼠伤寒沙门氏菌 Article

Yuting Shang,Shuzhen Cai,Qinghua Ye,Qingping Wu,Yanna Shao,Xiaoying Qu,Xinran Xiang,Baoqing Zhou,Yu Ding,Moutong Chen,Liang Xue,Honghui Zhu,Jumei Zhang

《工程(英文)》 2022年 第19卷 第12期   页码 62-70 doi: 10.1016/j.eng.2021.03.024

摘要:

快速、灵敏、即时检测致病菌对食品安全至关重要。在这项研究中,开发了一种新的量子点纳米珠标记的侧流免疫检测试纸条(QB-labelled LFIAS)结合链置换环介导的等温扩增(SD-LAMP)技术,用于定量检测鼠伤寒沙门氏菌(ST)。量子点纳米珠(QB)作为荧光报告材料,具有良好的检测效率。在LAMP中使用了可定制的链置换(SD)探针,以提高方法的特异性并防止副产物捕获。检测基于夹心免疫分析法。荧光条读取器测量测试(T)线和对照(C)线的荧光强度(FI)。条带的线性检测范围为每毫升102 ~ 108个菌落形成单位(CFU)。视觉检出限为103 CFU·mL−1,表明该系统的灵敏度是AuNP 标记试纸的10 倍。根据聚合酶链反应(PCR)和SD-LAMP的琼脂糖凝胶输出分析ST 特异性。在食品中检测到ST,回收率为85%~110%。该方法快速、简便,几乎不需要设备,适用于食品中的细菌检测和临床诊断。

关键词: 鼠伤寒沙门氏菌     量子点纳米珠     侧流免疫检测试纸条     环介导等温扩增     链置换探针    

一款用于快速检测包括SARS-CoV-2 在内的19 种常见呼吸道病毒的高通量、多指标等温扩增平台 Article

邢婉丽,刘莹莹,王会丽,李尚霖,林勇平,陈蕾,赵艳,晁爽,黄小兰,葛少林,邓涛,赵添,李宝莲,王瀚博,王磊,宋云鹏,金荣华,何建行,赵秀英,刘鹏,李为民,程京

《工程(英文)》 2020年 第6卷 第10期   页码 1130-1140 doi: 10.1016/j.eng.2020.07.015

摘要:

快速、准确地诊断以及及时对感染严重急性呼吸系统综合征冠状病毒2(SARS-CoV-2)的患者进行隔离被认为是抗击新冠病毒肺炎(COVID-19)大流行的最有效的措施。本文介绍了一款高通量、多指标的等温扩增检测平台(RTisochipTM-W),该平台使用离心式微流控芯片,在90 min内即可完成一次运行,从16个样本中检测出包括SARS-CoV-2在内的19种常见呼吸道病毒。通过RTisochipTM-W系统检测的所有病毒的检出限均等于或小于50拷贝· μL−1,与常规逆转录聚合酶链反应(RT-PCR)灵敏度相当。该系统具有重复性好、鲁棒性强和特异性高的优点。最后,使用RTisochipTM-W系统对201例临床前样本、14例COVID-19阳性临床样本、25例临床确诊样本以及614例来自呼吸道感染或疑似感染的患者的临床样本进行了测试。测试结果与临床诊断结果吻合良好,也反映出呼吸道传染病的流行特征。在对SARS-CoV-2的诊断上,RTisochipTM-W系统与参考试剂盒的一致性达到98.15%。基于大量的测试结果,我们相信RTisochipTM-W系统是一款抗击COVID-19大流行的强有力工具。

关键词: COVID-19     SARS-CoV-2     微流控     核酸检测     等温扩增    

标题 作者 时间 类型 操作

海洋渔业碳汇及其扩增战略

唐启升,刘 慧

期刊论文

Using RAPD in genotyping and transmission detection

ZHANG Tiejun, ZHOU Xiaoming, ZHANG Tao, YU Shunzhang, JIANG Qingwu, CHEN Yue

期刊论文

智能手机成像的晶片上基于逆转录环介导等温扩增(RT-LAMP)技术的全血中HIV-1检测

Gregory L. Damhorst,Carlos Duarte-Guevara,Weili Chen,Tanmay Ghonge,Brian T. Cunningham,Rashid Bashir

期刊论文

移动荷载作用下三塔悬索桥的强迫振动研究

冯兆祥,陈亮,缪长青

期刊论文

Experimental Study on the Piezoelectric Prestage Driver of Electrohydraulic Servo Valves

CHENG Guang-ming, SHEN Chuan-liang, YANG Zhi-gang

期刊论文

High-level expression of recombinant IgG1 by CHO K1 platform

Ningning Xu, Jianfa Ou, Al-Karim (Al) Gilani, Lufang Zhou, Margaret Liu

期刊论文

Aptamer-coded DNA nanoparticles for targeted doxorubicin delivery using pH-sensitive spacer

Pengwei Zhang, Junxiao Ye, Ergang Liu, Lu Sun, Jiacheng Zhang, Seung Jin Lee, Junbo Gong, Huining He, Victor C. Yang

期刊论文

Observation of a higher JAK2 V617F homozygous mutated clone in polycythemia vera compared to essential thrombocythemia

LIU Hongxing, TONG Chunrong, CAI Peng, GU Jiangying, LIN Yuehui, TENG Wen, WANG He, ZHANG Ying, ZHU Ping

期刊论文

微生物资源分子鉴定技术的研究进展

张羽,马爱进,高利芬,彭海,贾英民,孙宝国

期刊论文

基于链置换环介导等温扩增的量子点纳米珠标记侧流免疫检测试纸条快速灵敏检测鼠伤寒沙门氏菌

Yuting Shang,Shuzhen Cai,Qinghua Ye,Qingping Wu,Yanna Shao,Xiaoying Qu,Xinran Xiang,Baoqing Zhou,Yu Ding,Moutong Chen,Liang Xue,Honghui Zhu,Jumei Zhang

期刊论文

一款用于快速检测包括SARS-CoV-2 在内的19 种常见呼吸道病毒的高通量、多指标等温扩增平台

邢婉丽,刘莹莹,王会丽,李尚霖,林勇平,陈蕾,赵艳,晁爽,黄小兰,葛少林,邓涛,赵添,李宝莲,王瀚博,王磊,宋云鹏,金荣华,何建行,赵秀英,刘鹏,李为民,程京

期刊论文