检索结果-南通市图书馆

Exosomes： multitask cargo carriers modulating innate mmunity to viruses

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Cellular & Molecular Immunology 2017年第5期14卷 476-477页

作者： Mario u Mondelli Research Laboratories Department of InfectioutDiseases Fondazione IRCCS Policlinico SanMatteo and Department of Internal Medicin~and Therapeutics University of Pavia Pavi~27100 Italy /

Chronic infection with hepatitis B virus （HBV） is a major cause, ofcirrhosis and liver cancer worldwide. HBV is a smart DNA virus that replicates through an RNA intermediate. The viral genome translocates to the nucleus where it is converted into covalently closed circttlar DNA （cccDNA） serving as a template for viral transcription.

关键词： multitask cargo carriers innate immunity viruses

Effect of densification distribution on the Young's modulus of porous coatings after nano-indentation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Acta Metallurgica Sinica(English Letters) 2012年第5期25卷 383-390页

作者： Xiaojuan L u Ping XIAO Haiyan LI School of Environment Science and Engineering North China Electric Power University Yonghua North Street Baoding 071000 China School of Materials The University of Manchester Manchester M1 7HS UK School of Mechanical Aerospace and Civil Engineering The University of Manchester P.O. Box 88Sackville Street Manchester M60 1QD UK

Nano-indentation of a porous ceramic coating leads to crushing and densification of the coating under the indenter. In this work, finite element simulations of indentation on the porous coating have been carried out to study the effect of the size and dis- tribution of densification on Youngts modulus measured by nano-indentation. Two totally different distribution patterns have been simulated in this work. In the case of gradient densification, the Youngts modulus increased by 8.6% when the densifi- cation has occurred in the maximum influenced area. While the Young^s modulus increased by 2% with a uniformed densification. Examinations of the cross-section of the coatings have suggested that the densification after the indentation is close to the second model. The measured Young＇s modulus could have differed by 2%. The effect of densification on the Young＇s modulus measured by using nano-indentation is strongly dependent on the densification patterns of the porous coating.

关键词： Film Mechanical property Finite element simulation Porosity Electron Microscopy

Demonstration of Far-Infrared GaAs/AlGaAs Quantum Well Photodetectors for Broadband Wavelength Detection

在线全文

学校读者我要写书评

暂无评论

Chinese Physics Letters 2000年第12期17卷 921-923页

作者： SHEN Wen-Zhong Perera A.G.u Department of Applied Physics Shanghai Jiao Tong UniversityShanghai 200030 National Laboratory for Infrared Physics Shanghai Institute of Technical PhysicsShanghai 200083 Department of Physics and Astronomy Georgia State UniversityAtlantaGA 30303USA

We discuss the realization of broadband wavelength detection by demonstrating the longest cutoff wavelength(λc=28.6μm)far-infrared GaAs/AIGaAs quantum well infrared photodetectors(QWIPs).The responsivity is comparable to that of mid-infrared GaAs/AIGaAs and InGaAs/GaAs QWIPs,with a responsivity of 0.265 A/W and detectivity of 3.4x109 ***1/2/W at the peak wavelength of 26.9μm at *** on the temperature-dependent dark current and response results,it is expected that similar performance can be obtained at least up to 20 *** ways to expand the wavelength coverage are also addressed.

关键词： GaAs/AlGaAs Infrared Quantum

Swine flu pandemic:a global concern

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Medicine 2010年第1期3卷 81-82页

作者： Asad u Khan Interdisciplinary Biotechnology unit AMU Aligarh 202002 India

Recently WHO has again declared Influenza pandemic due to the outbreak of H1N1 which has infected over 254,206 people in 80 countries,with 625 *** lab has started working on the proteome analysis of H1N1,2009 out brea... 详细信息

关键词： Influenza A Virus Swine

Size Dependent Physical Properties of Nanostructured α-Fe_2O_3 Thin Films Grown by Successive Ionic Layer Adsorption and Reaction Method for Antibacterial Application

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Materials Science & Technology 2015年第1期31卷 1-9页

作者： A.u.ubale M.R.Belkhedkar Nanostructured Thin Film Materials Laboratory Department of PhysicsGovt.Vidarbha Institute of Science and Humanities Department of Physics Shri Shivaji College

Thin films of nanostructured α-FeOwith thickness of 1 56,203 and 251 nm were deposited by successive ionic layer adsorption and reaction(SILAR) method onto glass substrates using FeCl-6HO and NaOH as cationic and anionic *** X-ray diffraction studies revealed that,α-FeOthin films are nanocrystalline in nature with rhombohedral *** morphological properties were investigated by field emission scanning electron and atomic force *** optical studies showed that α-FeOexhibits direct as well as indirect optical band gap *** electrical resistivity of α-FeOat 305 K decreases from 11.76×102 to9.46 × 10~2 Ω cm as film thickness increases from 156 to 251 *** thermo-emf measurements confirmed that α-FeOexhibits n-type *** nanocrystalline α-FeOexhibits antibacterial character against Staphylococcus aureus and its efficiency increases from 37.50%to 87.50%depending on crystallite size.

关键词： Thin films Nanostructures AFM(atomic force microsc

在线全文

学校读者我要写书评

暂无评论

低温等离子体降解食品中真菌毒素的研究进展

中国粮油学报 2023年第5期38卷 157-165页

作者：支爱何学明沈飞邢常瑞 Firew Tafesse mamo 南京财经大学食品科学与工程学院南京210023 江苏高校现代粮食流通与安全协同创新中心南京210023 巴赫达尔大学埃塞俄比亚生物技术研究所亚的斯亚贝巴5954

低温等离子体是一种新型非热加工技术。与传统降解方法相比,该技术具有诸多潜在优势,如环保、高效、低成本等,故而近年来将其用于降解食品中真菌毒素的研究已逐步增多。本文系统地阐述了该研究方向的最新进展,对国内外利用该技术降解真... 详细信息

低温等离子体是一种新型非热加工技术。与传统降解方法相比,该技术具有诸多潜在优势,如环保、高效、低成本等,故而近年来将其用于降解食品中真菌毒素的研究已逐步增多。本文系统地阐述了该研究方向的最新进展,对国内外利用该技术降解真菌毒素的研究现状进行了总结,从活性物质和降解产物两方面分析了其潜在机制,并简要介绍了关于降解产物毒性评价的研究内容。然而,低温等离子体处理的有效成分和确切作用机理尚不完全清楚,已研究的食品种类也较少。进一步的研究应着眼于突破这些瓶颈,为低温等离子体技术的推广应用提供参考。

关键词：低温等离子体真菌毒素降解机理

Laser Surface Texturing of Co–Cr–Mo Alloy for Biomedical Applications:A Case Study for the Effects of Process Parameters on Surface Properties

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2023年第5期20卷 1967-1984页

作者： Şefika Kasman İbrahim Can uçar Sertan Ozan Department of Mechanical Engineering Dokuz Eylul UniversityIzmir35397Turkey Department of Mechanical Engineering Yozgat Bozok UniversityYozgat66100Turkey

This study presents a comprehensive approach to applying texturing processes created by engraving on the surface of CoCr28Mo alloy workpieces using a 20 W pulsed nanosecond fiber *** hatch strategy and distance,frequency,and scan speed were control parameters for texturing *** effectiveness of the parameters in terms of roughness and contact angle of the texturized surface was *** roughness and contact angle were analyzed using variance analysis to identify each variable's *** has been determined that the roughness of the texture defined by the hatch strategy plays a decisive role in the wettability behavior of the surface;however,the scan speed,frequency,and hatch distance which are among the laser surface texturing conditions are influential in the roughness and contact *** scan speed and hatch distance while decreasing frequency resulted in smoother surfaces,increasing the contact *** having rough surfaces produced with different processing conditions exhibit a super hydrophilic *** contact angle is most sensitive to the hatch distance;however,the frequency has the least influence on the contact *** most and least efficient surface roughness parameters are revealed to be scan speed and hatch distance,respectively.

关键词： Laser surface texturing Co-Cr-Mo alloy Surface roughness Wettability Bionic

Institute of Energy Process Engineering and Chemical Engineering (IEC), Tu Bergakademie Freiberg: Towards a Circular Carbon Economy

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Clean Energy 2019年第4期3卷 316-323页

作者： Freiberg, T u Bergakademie Reiche Zeche Fuchsmuehlenweg 9 Freiberg 09599 Germany

1 History of the Institute of Energy Process Engineering and Chemical Engineering(IEC)The history of IEC dates back to 1918,when the Lignite Foundation of the State of Saxony was founded to develop pro-cesses and technologies for lignite utilization in *** 1919,the precursor department of IEC with a focus on the thermochemical conversion of lignite was established.

关键词： Saxon IEC Carbon

Production and Accumulation of Xylooligosaccharides with Long Chains by Growing Culture and Xylanase of a Mutant Strain of Bacillus pumilus X-6-19

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

生物工程学报 2008年第7期24卷 1221-1227页

作者： Qingzhu Yuan Tsuyoshi Adachi Shinji Takenaka Shuichiro murakami Machiko Tanaka Kenji Aoki Division of Life Science Graduate School of Science and Technology Kobe University Rokko Kobe 657-8501 Japan Department of Applied Biological Chemistry Graduate school of Agricultural Science Kobe University Rokko Kobe 657-8501 Japan Research ＆ Development Department Bunsen Co. Ltd. Shingu-cho Tatsuno 679-4393 Japan

Bacillus pumilus X-6-9 isolated from soil and subsequently identified, produced xylooligosaccharides with long chains from xylan and accumulated them in the culture. By improving the culture conditions and mutating the bacterium, a 3.2-fold increase in the production of the xylooligosaccharides was established, when compared to the original culture conditions of B. pumilus X-6-19. The addition of D-glucose to the culture of the mutant strain u-3 of B. pumilus X-6-9 repressed the synthesis of β-xylosidase, but not xylanase. Thus, it was revealed that strain u-3 was a good organism for the production and accumulation of xylooligosaccharides with long chains from xylan by a microbial culture. Xylanase produced by strain u-3 was purified to homogeneity and characterized. The hydrolyzates generated by the purified xylanase contained xylobiose, xylotriose, xylotetraose, and xylopentaose, but not xylose.

关键词：木聚糖酶菌株细菌堆积作用