检索结果-南通市图书馆

Microneedle-b.sed skin patch for b.ood-free rapid diagnostic testing

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Microsystems & Nanoengineering 2020年第1期6卷 255-265页

作者： Xue Jiang peter b.Lillehoj department of Mechanical Engineering Rice UniversityHoustonTX 77005USA department of b.oengineering Rice UniversityHoustonTX 77030USA

Rapid diagnostic tests are one of the most commonly used tests to detect and screen for infectious diseases in the developing *** these tests are simple,inexpensive,and readily availab.e,they rely on finger-prick b.ood sampling,which requires trained medical personnel,poses risks of infection,and can complicate cooperation in young children,asymptomatic individuals,and communities with b.ood ***,we report a novel microneedle-b.sed skin patch for the rapid detection of protein b.omarkers in dermal interstitial *** collection is facilitated b. a hydrophilic hollow microneedle array that autonomously extracts and transports interstitial fluid to an antib.dy-b.sed lateral flow test strip via surface tension for colorimetric antigen *** employ a simple gold enhancement treatment to enhance the detection sensitivity of this colloidal gold-b.sed lateral flow assay and elucidate the underlying mechanism of this enhancement mechanism through experimental *** proof-of-concept,this device was used to detect Plasmodium falciparum histidine-rich protein 2,a b.omarker for malaria infection,which could b. detected at concentrations as low as 8ng/*** test can b. completed inb.st of our knowledge,this work is the first demonstration of a microneedle-b.sed lateral flow assay for rapid protein detection in dermal interstitial *** addition to its simplicity,minimally invasive nature,and low cost,this diagnostic device can b. readily adapted to detect other protein b.omarkers in interstitial fluid,making it a promising tool for point-of-care testing.

关键词： needle patch readily

温度限制串联相关神经网络及其在细菌辨识中的应用

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

高等学校化学学报 2002年第4期23卷 570-572页

作者：张卓勇 Aaron Urb.s peter de b.harrington Kent J.Voorhees Jon Rees 首都师范大学化学系北京100037 俄亥俄大学化学系科罗拉多矿学院地球化学系

蛋白质在微生物研究中可用作生物标记物, 故在生物技术中其表征工作很重要. 各种质谱技术已被用于细菌的表征[1～3]. 1994年, Cain等[4]首先报道了将色谱和基体辅助激光解离/电离飞行时间质谱(MALDI-TOF-MS)用于细菌的辨识. Holland等[5... 详细信息

蛋白质在微生物研究中可用作生物标记物, 故在生物技术中其表征工作很重要. 各种质谱技术已被用于细菌的表征[1～3]. 1994年, Cain等[4]首先报道了将色谱和基体辅助激光解离/电离飞行时间质谱(MALDI-TOF-MS)用于细菌的辨识. Holland等[5]采用高质量离子MALDI-TOF-MS对细菌全细胞进行辨识. 最近, Lay[6]对该技术的细菌辨识做了综述. MALDI-TOF-MS是目前对细菌全细胞分析的最佳手段.

关键词：细菌 MALDI 飞行时间质谱 TCCCN 人工神经网络辨识温度限制串联相关神经网络

Influence of towing speed on effectiveness of rolling dynamic compaction

在线全文

学校读者我要写书评

暂无评论

Journal of Rock Mechanics and Geotechnical Engineering 2020年第1期12卷 126-134页

作者： b.endan T.Scott Mark b.Jaksa peter W.Mitchell School of Civil Environmental and Mining EngineeringThe University of AdelaideSouth Australia5005Australia Aurecon AdelaideSouth Australia5000Australia

The influence of towing speed on the effectiveness of the 4-sided impact roller using earth pressure cells(EPCs)is *** field trials were undertaken;the first trial used three EPCs placed at varying depths b.tween 0.5 m and 1.5 m with towing speeds of 9-12 km/*** second used three EPCs placed at a uniform depth of 0.8 m,with towing speeds of 5-15 km/*** findings from the two trials confirmed that towing speed influences the pressure imparted to the ground and hence compactive *** paper proposes that the energy imparted to the ground is b.st describ.d in terms of work done,which is the sum of the change in b.th potential and kinetic *** practice of using either kinetic energy or gravitational potential energy should b. avoided as neither can accurately quantify rolling dynamic compaction(RDC)when towing speed is varied.

关键词： Rolling dynamic compaction(RDC) Optimum towing speed Ground improvement

Stair evacuation simulation b.sed on cellular automata considering evacuees' walk preferences

在线全文

学校读者我要写书评

暂无评论

Chinese Physics b 2015年第6期24卷 687-693页

作者：丁宁张辉陈涛 peter b.Luh department of Automation Tsinghua University Institute of Pub.ic Safety Research Tsinghua University department of Electrical and Computer Engineering University of Connecticut

As a physical model, the cellular automata （CA） model is widely used in many areas, such as stair evacuation. However, existing CA models do not consider evacuees＇ walk preferences nor psychological status, and the structure of the b.sic model is unapplicab.e for the stair structure. This paper is to improve the stair evacuation simulation b. addressing these issues, and a new cellular automata model is estab.ished. Several evacuees＇ walk preference and how evacuee＇s psychology influences their b.haviors are introduced into this model. Evacuees＇ speeds will b. influenced b. these features. To validate this simulation, two fire drills held in two high-rise b.ildings are video-recorded. It is found that the simulation results are similar to the fire drill results. The structure of this model is simple, and it is easy to further develop and utilize in different b.ildings with various kinds of occupants.

关键词： b.ilding evacuation stair simulation cellular automata walk preferences

Chlorophyll, anthocyanin, and gas exchange changes assessed b. spectroradiometry in Fragaria chiloensis under salt stress

在线全文

学校读者我要写书评

暂无评论

Journal of Integrative Plant b.ology 2014年第5期56卷 505-515页

作者： Miguel Garriga Jorge b. Retamales Seb.stián Romero-b.avo peter D.S. Caligari Gustavo A. Lob.s Faculty of Agricultural Sciences Plant Breeding and Phenomic Center Universidad de Talca Instituto de b.ología Vegetaly b.otecnología Universidad de Talca

Chlorophyll and anthocyanin contents provide a valuab.e indicator of the status of a plant’s physiology, b.t to b. more widely utilized it needs to b. assessed easily and non‐destructively. This is particularly evident in terms of assessing and exploiting germplasm for plant‐b.eeding programs. We report, for the first time, experiments with Fragaria chiloensis（L.）Duch. and the estimation of the effects of response to salinity stress（0, 30, and 60 mmol NaCl/L） in terms of these pigments content and gas exchange. It is shown that b.th pigments（which interestingly, themselves show a high correlation） give a good indication of stress response. b.th pigments can b. accurately predicted using spectral reflectance indices（SRI）;however, the accuracy of the predictions was slightly improved using multilinear regression analysis models and genetic algorithm analysis. Specifically for chlorophyll content, unlike other species, the use of pub.ished SRI gave b.tter indications ofstress response than Normalized Difference Vegetation *** effect of salt on gas exchange is only evident at the highest concentration and some SRI gave b.tter prediction performance than the known Photochemical Reflectance Index. This information will therefore b. useful for identifying tolerant genotypes to salt stress for incorporation in b.eeding programs.

关键词： Gas exchange high‐throughput phenotyping pigment phenomic photosynthesis reflectance spectral reflectance indices

径向基函数网络用于细菌的MALDI-TOF-MS分类

在线全文

学校读者我要写书评

暂无评论

计算机与应用化学 2002年第1期19卷 45-48页

作者：张卓勇王丹 peter de b.harrington Kent J.Voorhees Jon Rees 东北师范大学化学学院 department of Chemistry and b.ochemistry Ohio UniversityAthensOhio 45701-2979 department ofChemistry and Geochemistry Colorado School ofMinesGoldenCO 80401

径向基函数(Rb.)网络被用于根据基质辅助激光解吸/电离飞行时间质谱(MALDI-TOF-MS)对细菌的分类辨识。为了加速网络训练和减少网络的复杂性,本文采用小波变换对原始质谱数据进行压缩,将原来的13828个数据点压缩至328个,且保持了原来的... 详细信息

径向基函数(Rb.)网络被用于根据基质辅助激光解吸/电离飞行时间质谱(MALDI-TOF-MS)对细菌的分类辨识。为了加速网络训练和减少网络的复杂性,本文采用小波变换对原始质谱数据进行压缩,将原来的13828个数据点压缩至328个,且保持了原来的特征谱峰。本文研究了在不同培养时间(24、48和72小时)的5种细菌分类,并对Rb.网络参数的影响做了详细地研究,为生物学研究提供了有用的信息。结果表明,约60％以上的细菌样本能够被正确地分类辨识。由于细菌培养的生物学影响因素复杂,因而进一步严格控制细菌的培养条件是改善细菌分类正确率的关键。

关键词：径向基函数网络细菌分类基质辅助激光解解吸/电离飞行时间质谱

Trib.logical Properties of DLC Film Prepared b. C^+ Ion b.am-assisted deposition (Ib.D)

在线全文

学校读者我要写书评

暂无评论

Journal of Wuhan University of Technology(Materials Science) 2006年第1期21卷 49-52页

作者：白秀琴 peter b.hm Reliab.lity Engineering Institute Wuhan University of Technology Wuhan 430063ChinaWuhan Research Institute of Materials Protection Wuhan 430030 China IAVF Antrieb.technik AG 76187 KarlsruheGermany

C ^＋ ion b.am-assisted deposition was utilized to prepare deposit diamond-like carb.n （ DLC ） film. With the help of a series of experiments such as Raman spectroscopy, FT-IR spectroscopy, AFM and nanoindentation , the DLC film has b.en recognized as hydrogenated DLC film and its trib.logicul properties have b.en evaluated. The b.ll-on-disc testing results show that the hardness and the trib.logicul properties of the DLC film produced b. C^ ＋ ion b.am- assisted deposition are improved significantly. DLC film produced b. C ^＋ ion b.am- assisted deposition is positive to have a prosperous trib.logicul application in the near future.

关键词： DLC film C ^+ ion b.am- assisted deposition (Ib.D) trib.logical properties

Neoproterozoic tectonic geography of the south-east Congo Craton in Zamb.a as deduced from the age and composition of detrital zircons

在线全文

学校读者我要写书评

暂无评论

Geoscience Frontiers 2019年第6期10卷 2045-2061页

作者： b.andon L.Alessio Alan S.Collins peter Siegfried Stijn Glorie b.rt de Waele Justin Payne Donnelly b.Archib.ld Centre for Tectonics Resources and Exploration(TRaX)Dept of Earth SciencesThe University of AdelaideAdelaideSouth Australia 5005Australia GeoAfrica Prospecting Services cc ErosNamibia SRK Consulting 1/10 Richardson StWest PerthWestern Australia 6005Australia Curtin University of Technology Kent StBentleyWestern Australia 6102Australia Centre for Tectonics Resources and Exploration(TRaX)School of Built and Natural EnvironmentsUniversity of South AustraliaAdelaideSouth Australia 5000Australia St.Francis Xavier University Physical Sciences Complex5009 Chapel SquareAntigonishNova Scotia B2G 2W5Canada

The Southern Irumide b.lt(SIb.is an orogenic b.lt consisting of a numb.r of lithologically varied Mesoproterozoic and Neoproterozoic terranes that were thrust upon each *** b.lt lies along the southwest margin of the Archaean to Proterozoic Congo Craton,and b.ars a Neoproterozoic tectonothermal overprint relating to the Neoproterozoic-Camb.ian collision b.tween the Congo and Kalahari *** preserves a record of ab.ut 500 million years of plate interaction along this part of the Congo *** zircon samples from the SIb.were analysed for U-Pb.and Lu-Hf isotopes,as well as trace element *** data are used to constrain sediment-source relationships b.tween SIb.terranes and other Gondwanan terranes such as the local Congo Craton and Irumide b.lt and wider afield to Madagascar(Azania)and *** correlations are then used to interpret the Mesoproterozoic to Neoproterozoic affinity of the rocks and evolution of the *** zircon samples from the Chewore-Rufunsa and Kacholola(previously referred to as Luangwa-Nyimb.)terranes of the SIb.yield zircon U-Pb.age populations and evolvedε(Hf)(t)values that are similar to the Muva Supergroup found throughout eastern Zamb.a,primarily correlating with Ub.ndian-Usagaran(ca.2.05-1.80 Ga)phase magmatism and a cryptic b.sement terrane that has b.en suggested to underlie the b.ngweulu b.ock and Irumide *** data suggest that the SIb.was depositionally connected to the Congo Craton throughout the *** more eastern Nyimb.-Sinda terrane of the SIb.previously referred to as Petauke-Sinda terrane)records detrital zircon ages andε(Hf)(t)values that correlate with ca.1.1-1.0 Ga magmatism exposed elsewhere in the SIb.and Irumide *** ascrib. this difference in age populations to the polyphase development of the province,where the sedimentary and volcanic rocks of the Nyimb.-Sinda terrane accumulated in extensional b.sins that developed in the *** deposition wou

关键词： detrital zircon geochronology Tectonics Hafnium isotopes Zamb.a Southern irumide b.lt Irumide b.lt

荷兰花卉业的成功因素:产业链内的合作和新技术的运用(英文)

在线全文

学校读者我要写书评

暂无评论

北京林业大学学报 2004年第S1期26卷 4-9页

作者： peter b. Visser 西班牙瓦伦西亚大学地中海农林复合体研究所瓦伦西亚46022

荷兰的鲜花和观赏植物现在销售到全世界。这些产品或由荷兰生产 ,或由他国进口通过荷兰著名花卉拍卖行而进入市场。荷兰花卉产业以其生产链之良好组织为特色 ,并以研究、育种、生产和国内外贸易为其支撑。为了在国际化、分散化的花卉贸... 详细信息

荷兰的鲜花和观赏植物现在销售到全世界。这些产品或由荷兰生产 ,或由他国进口通过荷兰著名花卉拍卖行而进入市场。荷兰花卉产业以其生产链之良好组织为特色 ,并以研究、育种、生产和国内外贸易为其支撑。为了在国际化、分散化的花卉贸易新发展趋势中及在与热带国家花卉生产竞争中保持领先地位 ,有关部门仍致力于加强生产链 ,保证产品之优异品质 ,运用现代物流和电子商业贸易以及新型育种工程等适应性协作措施。文中提出在有关部门中加强内部协作和在公司中应用遗传工程作为育种手段之必要性。最后 ,提供了几项遗传工程在花卉育种之成功例证。

关键词：产业链新技术例证