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Bacteriophage M13 as a Scaffold for Preparing Conductive Polymeric Composite Fibers

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Nano Research 2008年第3期1卷 235-241页

作者： Zhongwei niu Michael ABruckman Brandon Harp Charlene MMello Qian Wang Department of Chemistry and Biochemistry and Nanocenter University of South CarolinaColumbiaSC 29208USA Bioscience and Technology Team US Army Natick Soldier ResearchDevelopment&Engineering CenterNatickMA 01760-5020USA

Using biological templates to build one-dimensional functional materials holds great promise in developing nanosized electrical devices,sensors,catalysts,and energy storage *** this communication,we report a versatile assembly process for the preparation of water-soluble conductive polyaniline(PANi)/M13 composite nanowires by employing the bacteriophage M13 as a *** surface lysine residues of M13 can be derivatized with carboxylic groups to improve its binding ability to the aniline;the resulting modifi ed M13 is denoted as *** negatively-charged poly(sulfonated styrene)was used both as a dopant acid and a stabilizing agent to enhance the stability of the composite fi bers in aqueous solution.A transparent solution of the conductive PANi/m-M13 composite fi bers can be readily obtained without any further purifi cation *** fi bers can be easily fabricated into thin conductive fi lms due to their high aspect ratio and good solubility in aqueous *** synthesis discloses a unique and versatile way of using bionanorods to produce composite fi brillar materials with narrow dispersity,high aspect ratio,and high processibility,which may have many potential applications in electronics,optics,sensing,and biomedical engineering.

关键词： Bacteriophage M13 nanofi ber conductive polymer self-assembly bioconjugation

High-throughput Sequencing Reveals vsiRNAs Derived from Cucumber green mottle mosaic virus-infected Watermelon

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Horticultural Plant Journal 2017年第1期3卷 17-22页

作者： SUN Yuyan niu Xiaowei CUI Di FAN Min Institute of Vegetables Zhejiang Academy of Agricultural Sciences

Cucumber green mottle mosaic virus(CGMMV) is a member of the genus Tobamovirus, and is a serious pathogen of Cucurbitaceae crops. Virusderived small interfering RNAs(vsi RNAs), which are processed by Dicer-like and Argonaute proteins as well as RNA-dependent RNA polymerase,mediate the silencing of viral genomic RNA and host transcripts. To identify the CGMMV derived vsi RNAs and reveal interactions between CGMMV and watermelon host plant, deep sequencing technology was used to identify and characterize the vsi RNAs derived from CGMMV in infected watermelon plants in present study. A total of 10 801 368 vsi RNA reads representing 71 583 unique s RNAs were predicted in CGMMVinoculated watermelon plants. The CGMMV vsi RNAs were mostly 21 or 22 nt long. The majority of the CGMMV vsi RNAs(i.e., 91.7%) originated from the viral sense strand. Additionally, uracil was the predominant 5′-terminal base of vsi RNAs. Furthermore, the putative targets and functions of some of the CGMMV vsi RNAs were predicted and investigated. The results enhance our understanding of the interaction between CGMMV and the host watermelon and provide molecular basis for CGMMV resistance improvement in watermelon and other Cucurbitaceae crops.

关键词： Citrullus lanatus cucumber green mottle mosaic virus high-throughput sequencing vsiRNAs

Semiannual velocity variations around the 2008 M_w 7.9 Wenchuan Earthquake fault zone revealed by ambient noise and ACROSS active source data

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Earthquake Science 2014年第5期27卷 529-540页

作者： Haichao Chen Hongkui Ge Fenglin niu Key Laboratory of Seismic Observation and Geophysical Imaging Institute of GeophysicsChina Earthquake Administration Unconventional Natural Gas Institute China University of Petroleum Department of Earth Science Rice University

We continuously monitor the long-term seismic velocity variation of one of the major ruptured faults of the devastating 2008 Mw7.9 Wenchuan earthquake in China from July 2009 to January 2012,jointly using accurately controlled routinely operated signal system active source and seismic noise-based monitoring *** measurements show that the temporal velocity change is not homogeneous and highly localized in the damaged fault zone and the adjacent *** variations from the active and passive methods are quite consistent,which both are characterized by ±0.2 % seasonal variation,with peak and trough at winter and summer,*** periodic velocity variation within fault zone exhibits remarkably positive correlation with barometric pressure with stress sensitivity in the order of 10-6Pa-1,suggesting that the plausible mechanism might be the crack density variation of the shallow subsurface medium of the damaged fault zone in response to the cyclic barometric pressure loading.

关键词： Velocity variation - 2008 WenchuanEarthquake ACROSS active source Ambient noise

Rapid reactive synthesis of TiAl3 intermetallics by thermal explosion and its oxidation resistance at high temperature

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Progress in Natural Science:Materials International 2019年第4期29卷 447-452页

作者： Xinyang Jiao Xiaoping Cai Gao niu Xuanru Ren Xueqin Kang Peizhong Feng School of Materials Science and Engineering China University of Mining and Technology School of Chemical Engineering and Technology China University of Mining and Technology Research Center of Laser Fusion China Academy of Engineering Physics

Porous TiAl3intermetallics were synthesized from Ti-75 at.% A1 elemental powder mixtures using an energysaving and rapid reactive method of thermal explosion(TE).The results demonstrated that the actual temperature of the compact climbed rapidly from 673℃to 1036℃within 24 s,indicating that an obvious TE reaction occurred during sintering *** video graphs suggested that the TE in Ti-Al system behaved instant occurrence and overall heating whether from axial or radial *** silver wires and NaCl particles that pressed on the surface of the sample disappeared due to the heavy heat released during TE *** pure TiAl3phases were synthesized in TE products and the open porosity of 55.4% was easy to *** high-temperature treatment at 1000℃,large amounts of sintering-neck formed and then improved the compressive strength of porous ***,the mass gain curve of porous TiAl3intermetallics oxidized at 650℃for 120 h exhibited the parabolic oxidation rate *** analysis confirmed that the strong O 1 s peak was 531.4 eV which was the typical binding energy of ***,the excellent oxidation resistance of porous TiAl3foams would be considered as good candidate materials for prolonging the service life at high temperatures.

关键词： Porous materials Rapid synthesis TiAl3 intermetallics Thermal explosion Oxidation resistance

Surface Micro-Nano Structures on GaN Thin Films Induced by 355 nm Nanosecond Laser Irradiation

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激光与光电子学进展 2023年第7期60卷 196-202页

作者： Gu Yonggang niu Jian Yang Jian Dong Fang Xu Hongxing School of Physics and Technology Wuhan UniversityWuhan 430072HubeiChina State Key Laboratory of Precision Spectroscopy East China Normal UniversityShanghai 200062China The Institute of Technological Sciences Wuhan UniversityWuhan 430072HubeiChina

Gallium nitride(GaN)has widespread applications in the semiconductor industry because of its desirable optoelectronic *** fabrication of surface structures on GaN thin films can effectively modify their optical and electrical properties,providing additional degrees of freedom for controlling GaN-based *** with lithography-based techniques,laser processing is maskless and much more *** paper shows how surface micronano structures can be produced on GaN thin films using 355 nm nanosecond laser *** effects of the laser pulse energy,number of pulses,and polarization direction were *** was found that distinct micro-nano structures were formed under different irradiation conditions,and their geometries and elemental compositions were *** results indicate that different types of surface micro-nano structures can be produced on GaN thin films in a controllable manner using 355 nm nanosecond laser *** results of our study provide valuable guidance for the surface modification of GaN-based optoelectronic devices.

关键词： gallium nitride thin films nanosecond laser micro-nano structures laser-induced periodic surface structures

Effect of plantar pressure on stepping friction under cross-slope condition

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Biosurface and Biotribology 2022年第1期8卷 15-22页

作者： Yanzhao Wang Deqiang Chen Yongzhen Zhang Yongping niu Xiaohui Yang National United Engineering Laboratory for Advanced Bearing Tribology Henan University of Science and TechnologyHenanLuoyangChina School of Materials Science and Engineering Henan University of Science and TechnologyHenanLuoyangChina Department of Neurology The First Affiliated Hospital of Henan University of Science and TechnologyHenanLuoyangChina

There are various walking pavements in daily *** accidents will happen if required friction for safe walking is greater than available friction between the foot and ground *** researches mostly focus on horizontal or slope pavements,whereas the cross-slope walkways are less.A self-developed gait friction test platform was used to test friction,distribution of plantar pressure and spatiotemporal parameters of human walking under cross-slope *** the increase of cross-slope angles,the mediolateral friction increases(R^(2)=0.972,Ple was prolonged(Ple.

关键词： cross-slope walkway slip spatiotemporal parameters

复方黄柏液涂剂负压滴灌对压疮创面的治疗效果及对相关炎症因子的影响

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中国中西医结合外科杂志 2024年第3期30卷 391-395页

作者：刘海涛韩志新牛大伟天津市第三中心医院整形美容科天津300170 天津市重症疾病体外生命支持重点实验室天津300170 天津市人工细胞工程技术研究中心天津300170 天津市肝胆疾病研究所天津300170 安阳市人民医院整形烧伤科河南安阳455000

目的:观察复方黄柏液涂剂联合封闭负压引流治疗压疮创面的效果及对相关炎症因子的影响。方法:选取2017年12月—2022年12月我院收治的压疮创面患者90例,均使用封闭负压引流技术治疗创面,根据灌洗液不同,分为生理盐水组(A组)、庆大霉素组(... 详细信息

目的:观察复方黄柏液涂剂联合封闭负压引流治疗压疮创面的效果及对相关炎症因子的影响。方法:选取2017年12月—2022年12月我院收治的压疮创面患者90例,均使用封闭负压引流技术治疗创面,根据灌洗液不同,分为生理盐水组(A组)、庆大霉素组(B组)、复方黄柏液涂剂组(C组),每组30例。对比不同灌洗液冲洗后三组患者治疗前、治疗后7 d、14 d、21 d各项指标的变化,包括创面愈合情况、血清淀粉样蛋白A(SAA)、白细胞介素-6(IL-6)及C反应蛋白(CRP)水平,并对创面分泌物行细菌培养和药敏试验。结果:创面愈合情况评分:治疗后7 d、14 d、21 d各组创面愈合情况评分均较治疗前降低(P0.05);治疗后21 d,C组的SAA、IL-6、CRP水平均较治疗后14 d进一步下降(P0.05)。细菌学变化:治疗后7 d,A、B、C三组患者细菌培养阳性比例均较治疗前有所下降(P<0.05),B、C组较A组细菌阳性率更低(P<0.05);治疗后14 d,三组患者细菌培养阳性比例较治疗后7 d后均有下降(P<0.05);治疗后21 d,C组阳性比例较治疗后14 d下降更明显(P<0.05),细菌培养结果显示以革兰阴性菌为主,治疗后14 d、21 d时,B组细菌对庆大霉素的耐药率明显高于A组和C组。结论:复方黄柏液涂剂滴灌联合封闭负压引流能改善压疮创面局部症状,有利于患者疾病转归,效果优于庆大霉素和生理盐水负压滴灌治疗。

关键词：复方黄柏液涂剂封闭负压引流压疮炎症因子

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Research on the carbon neutrality governance under a polycentric approach

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Advances in Climate Change Research 2022年第2期13卷 159-168页

作者： Xian-Chun Tan Ling-Si Kong Bai-He Gu An Zeng Miao-Miao niu Institutes of Science and Development Chinese Academy of SciencesBeijing 100190China School of Public Policy and Management University of Chinese Academy of SciencesBeijing 100190China

Carbon neutrality has increasingly become a crucial agenda within global climate ***,recent observations show that the governance architecture for carbon neutrality is transforming to ***,there is still a lack of systematic investigation on carbon neutrality governance under the polycentric *** this background,this study attempts to investigate the emergence and structure of polycentric climate governance,and to figure out to what extent the evolving polycentric system can contribute to the climate change governance towards carbon *** results show that efforts made by actors at transnational and subnational levels within the polycentric system can greatly complement the deficits of carbon neutrality governance by international regime and state government in many different ***,the identified issues,that are critical to carbon neutrality including climate legislation,adaptation,technology deployment and data authenticity and transparency,can be addressed in a more effective way through the coordination among multiple actors at multiple ***,further research should be conducted to address the dynamic linkages between international regimes as well as the issues related to small and medium-sized cities,and develop a comprehensive evaluation and accounting system for the risks and benefits of polycentric climate governance.

关键词： Climate governance Polycentricity Carbon neutrality

Hydrothermal Synthesis and Crystal Structure of a New 2D Layer Compound [{Ni(en)_2}_2Sb_8V_(14)O_(42)]·5.5H_2O

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Chemical Research in Chinese Universities 2009年第4期25卷 426-429页

作者： YU Li LIU Jiang-ping WANG Jing-ping niu Jing-yang Institute of Molecular and Crystal Engineering School of Chemistry and Chemical Engineering Ifenan University Kaifeng 475001 P. R. China

A new compound based on polyoxovanadate [{Ni（en）2}2Sb8V14O42]·5.5H2O（en=ethylenediamine）（1） was synthesised hydrothermally as black rhombus *** 1 crystallized in the monoclinic system with space group P21/n,Z=4,a=1.46953（9） nm,b=1.28623（8） nm,c=1.76008（11） nm,β=105.7230（10）°.In the asymmetric unit,cluster {Sb8V14O42} can be considered as an Sb derivative of the {V18O42} *** {Sb8V14O42} cluster as a building block interconnected to four other neighboring units by {Ni（en）2} bridging groups which are linked through the terminal oxygen atoms of the polyoxoanions,forming a two dimensional network.

关键词： Hydrothermal synthesis Antimony-substituted Polyoxovanadate