检索结果-南通市图书馆

Recent progress in ceramic matrix composites reinforced with graphene nanoplatelets

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

Rare Metals 2020年第5期39卷 513-528页

作者： Bei-Ying Zhou Sheng-Jie Fan Yu-Chi Fan Qi Zheng Xin Zhang Wan Jiang lian-jun wang Engineering Research Center of Advanced Glasses Manufacturing Technology Ministry of EducationDonghua UniversityShanghai 201620China Institute of Functional Materials Donghua UniversityShanghai 201620China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai 201620China School of Material Science and Engineering Jingdezhen Ceramic InstituteJingdezhen 333000China

Graphene nanoplatelets(GNPs)are considered to be one of the most promising new reinforcements due to their unique two-dimensional structure and remarkable mechanical *** addition,their impressive electrical and thermal properties make them attractive fillers for producing multifunctional ceramics with a wide range of *** paper reviews the current status of the research and development of graphene-reinforced ceramic matrix composite(CMC)***,we focused on the processing methods for effective dispersion of GNPs throughout ceramic matrices and the reduction of the porosity of CMC ***,the microstructure and mechanical properties are provided,together with an emphasis on the possible toughening mechanisms that may ***,the unique functional properties endowed by GNPs,such as enhanced electrical/thermal conductivity,are discussed,with a comprehensive comparison in different ceramic matrices as oxide and nonoxide ***,the prospects and problems needed to be solved in GNPs-reinforced CMCs are discussed.

关键词： Graphene nanoplatelets Ceramic matrix composites Processing methods Mechanical properties Functional properties

Multiscale architectures boosting thermoelectric performance of copper sulfide compound

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第8期40卷 2017-2025页

作者： Xin-Qi Chen Sheng-Jie Fan Chao Han Tian Wu lian-jun wang Wan Jiang Wei Dai Jian-Ping Yang School of Physics and Mechanical and Electrical Engineering Hubei Engineering Technology Research Center of Environmental Purification MaterialsInstitute of Materials Research and EngineeringHubei University of EducationWuhan430205China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringDonghua UniversityShanghai201620China Institute for Superconducting and Electronic Materials University of WollongongNorth WollongongNSW2500Australia

Owing to their high performance and earth abundance,copper sulfides(Cu_(2-x)S)have attracted wide attention as a promising medium-temperature thermoelectric *** and grain-boundary engineering are explored to tune the electrical transport and phonon scattering of Cu_(2-x)S based on the liquid-like copper *** multiscale architecture-engineered Cu_(2-x)S are fabricated by a room-temperature wet chemical synthesis combining mechanical mixing and spark plasma *** observed electrical conductivity in the multiscale architecture-engineered Cu_(2-x)S is four times as much as that of the Cu_(2-x)S sample at 800 K,which is attributed to the potential energy filtering effect at the new grain ***,the multiscale architecture in the sintered Cu_(2-x)S increases phonon scattering and results in a reduced lattice thermal conductivity of 0.2 W·m^(-1)·K^(-1) and figure of merit(zT)of 1.0 at 800 *** a zT value is one of the record values in copper sulfide produced by chemical *** results suggest that the introduction of nanostructure and formation of new interface are effective strategies for the enhancement of thermoelectric material properties.

关键词： Thermoelectric properties Copper sulfides Room-temperature synthesis Nanostructure Semiconductor

Solid-phase extraction and separation of heavy rare earths from chloride media using P227-impregnated resins

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第9期40卷 2633-2644页

作者： Bin Yang Suo-Zhi Wu Xin-Yu Liu Zeng-Xin Yan Yu-Xue Liu Qi-Song Li Feng-Shan Yu jun-lian wang School of Civil and Resource Engineering University of Science and Technology BeijingBeijing 100083China Jiangxi Province Han’s Precious Metals Co. LtdShangrao 335500China

A solid-phase extraction resin SIRs-P227/XAD-7 HP was prepared by impregnating extractant P227 onto macroporous resin XAD-7 HP beads. SIRs-P227/XAD-7 HP beads were characterized by Fourier transform infrared spectroscopy(FTIR) and scanning electron microscopy(SEM) equipped with energy-dispersive spectroscopy(EDS). The adsorption kinetics, particle size effect,adsorption isotherm, pH_(equilibrium)–lg D relationship(where D is distribution coefficient), desorption, adsorption selectivity for heavy rare earths, and impurity ions were studied. The results showed that the adsorption kinetics of Lu(III) on the SIRs-P227/XAD-7 HP beads fitted the Morris–Weber model best. The adsorbance decreased as the particle size increased. The pH_(equilibrium)–lg D relationship fitted well with a straight line, and the slope was 1.56. The experimental data fitted well with Langmuir *** calculated maximum adsorption capacity was23.8 mg·g^(-1), while the experimental datum was22.7 mg·g^(-1) at the given conditions. The adsorbed Lu(III)can be easily stripped by 0.1 mol·L^(-1) HCl. The adsorption selectivity of SIRs-P227/XAD-7 HP for heavy REs exhibited the following order: Lu>Yb>Tm>Er>Ho. The adjacent heavy rare earth(RE) separation factors β_(Lu/Yb),β_(Yb/Tm), β_(Tm/Er), and β_(Er/Ho)were 1.57, 3.00, 3.03, and 2.23,respectively, at liquid/solid ratio(L/S) equal to 3:20. The adsorption selectivity for impurity ions exhibited the followingorder:Fe >Lu>Tm>Zn>Mg>Ca>Ho>Co>Ni>Cu>Al.

关键词： Solid-phase extraction Solvent-impregnated resins P227 Heavy rare earths

在线全文

学校读者我要写书评

暂无评论

基于压缩感知的欠采样预失真研究

通信学报 2016年第11期37卷 74-79页

作者：胡欣王健康刘飞欧连军梁君王刚罗积润中国运载火箭技术研究院研究发展中心北京100076 中国科学院电子学研究所北京100190

为解决欠采样行波管功率放大器(TWTA)预失真问题,一般工程上采用查找表结合间接学习结构数字预失真方法,但是系统复杂度在一定程度上会增加。针对这种工程问题,提出了一种基于压缩感知技术的欠采样预失真技术,在简化系统实现、提高工作... 详细信息

为解决欠采样行波管功率放大器(TWTA)预失真问题,一般工程上采用查找表结合间接学习结构数字预失真方法,但是系统复杂度在一定程度上会增加。针对这种工程问题,提出了一种基于压缩感知技术的欠采样预失真技术,在简化系统实现、提高工作稳定性的同时,可以获得较好的非线性失真优化效果。

关键词：压缩感知非线性失真欠采样基带预失真

In vitro Anti-viral Activity of the Total Alkaloids from Tripterygium hypoglaucum against Herpes Simplex Virus Type 1

在线全文

学校读者我要写书评

暂无评论

Virologica Sinica 2010年第2期25卷 107-114页

作者： Zhe REN Chuan-hai ZHANG lian-jun wang Yun-xia CUI Ren-bin QI Chong-ren YANG Ying-jun ZHANG Xiao-yi WEI Da-xiang LU Yi-fei wang Biomedicine Research and Development Center of Jinan University Guangzhou 510632 China MedicalCollege of Jinan University Guangzhou 510632 China National Engineering Research Center of GeneticMedicine Guangzhou 510632 China Department of Chemistry and Biology West Anhui University Lu＇an 237012 China Kunming Institute of Botany Chinese Academy of Sciences Kunming 650204 China SouthChina Botanical Garden Chinese Academy of Sciences Guangzhou 510000 China

Herpes simplex virus type 1 （HSV-1） is a commonly occurring human pathogen worldwide. There is an urgent need to discover and develop new alternative agents for the management of HSV-1 infection. Tripterygium hypoglaucum （level） Hutch （Celastraceae） is a traditional Chinese medicine plant with many pharmacological activities such as anti-inflammation, anti-tumor and antifertility. The usual medicinal part is the roots which contain about a 1% yield of alkaloids. A crude total alkaloids extract was prepared from the roots of T. hypoglaucum amd its antiviral activity against HSV-1 in Vero cells was evaluated by cytopathic effect （CPE） assay, plaque reduction assay and by RT-PCR analysis. The alkaloids extract presented low cytotoxicity （CC50 = 46.6μg/mL） and potent CPE inhibition activity, the 50% inhibitory concentration （ICs0） was 6.5 μg/mL, noticeably lower than that of Acyclovir （15.4μg /mL）. Plaque formation was significantly reduced by the alkaloids extract at concentrations of 6.25 μg/mL to 12.5 μg/mL, the plaque reduction ratio reached 55% to 75% which was 35% higher than that of Acyclovir at the same concentration. RT-PCR analysis showed that, the transcription of two important delayed early genes UL30 and UL39, and a late gene US6 of HSV-1 genome all were suppressed by the alkaloids extract, the expression inhibiting efficacy compared to the control was 74.6% （UL30）, 70.9% （UL39） and 62.6% （US6） respectively at the working concentration of 12.5μg/mL. The above results suggest a potent anti-HSV-1 activity of the alkaloids extract in vitro.

关键词： Tripterygium hypoglaucum Herpes complex virus Alkaloid Antiviral activity Gene expression

Chromatographic Separation and Characterization of Capsaicinoids and Their Analogues

在线全文

学校读者我要写书评

暂无评论

Pharmacology & Pharmacy 2011年第3期2卷 136-140页

作者： jun-lian wang Li Zhou Lei wang Zheng hong Peng Sheng ze Zhou Xiang feng Zhou Xiao bin Zhang Bixian Peng 不详

An attempt was made to establish a chromatographic separation and analysis method for capsaicinoids and their analogues. A series of factors,such as choice of column and eluents, eluent composition,flow rate of eluent and operational temperature were correlated, countereacted and optimized to attain appropriate separation efficiency and finalize the experimentally oprational procedures as a whole, permiting a mixture comprising 8 capsaicinoids including analogues to be separated and Characterized with an allowed deviations and within a period of 36 minutes via 1 test as well.

关键词： Capsaicinoid Chromatography Separation Characterization

A Study of Pungency of Capsaicinoid as Affected by Their Molecular Structure Alteration

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

Pharmacology & Pharmacy 2011年第3期2卷 109-115页

作者： jun-lian wang Zheng-hong PENG Sheng-ze ZHOU Jin-xi Zhang Song-fei Zhang Xiang-feng ZHOU Xiao-bin ZHANG Bi-xian PENG Technical Institute of physics and Chemistry CAS Beijing China

An attempt was made in an effort to synthesize a series of capsaicinoids, most of which are synthesized in our laboratory and characterized to be completely new members of capsaicinoids. The Structure-pungency depende... 详细信息

关键词： Capsaicinoid Preparation Structure Pungency

新型化合物N-甲基-N-异丙基硫代辛酰胺从盐酸介质中选择性萃取分离钯

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

Transactions of Nonferrous Metals Society of China 2023年第5期33卷 1609-1618页

作者：王俊莲刘璐徐国栋王培龙黄国勇郁丰善北京科技大学土木与资源工程学院北京100083 金属矿山高效开采与安全教育部重点实验室北京100083 江西省汉氏贵金属有限公司上饶335500 中国石油大学(北京)化工学院重质油国家重点实验室北京102249

为实现从废汽车尾气净化催化剂的浸出液中高效分离钯,合成一种新化合物N-甲基-N-异丙基硫代辛酰胺(TA-813)。通过FT-IR、1H NMR、ESI-MS和元素分析进行表征,研究TA-813对钯的萃取和反萃行为。通过萃取−反萃循环试验评估TA-813的循环使... 详细信息

为实现从废汽车尾气净化催化剂的浸出液中高效分离钯,合成一种新化合物N-甲基-N-异丙基硫代辛酰胺(TA-813)。通过FT-IR、1H NMR、ESI-MS和元素分析进行表征,研究TA-813对钯的萃取和反萃行为。通过萃取−反萃循环试验评估TA-813的循环使用性能,并用TA-813从废汽车尾气净化催化剂的模拟浸出液中选择性萃取分离钯。结果表明:TA-813对钯萃取速度快、效率高、选择性好;2个TA-813分子萃取1个Pd;有机相中负载的钯可被中性和酸性硫脲高效反萃;TA-813循环使用性能好,经过8次萃取−反萃循环,钯的萃取率没有降低。在废汽车尾气净化催化剂的模拟浸出液中,Pd的浓度远低于杂质离子La、Ce、Mg和Al等,即便如此,TA-813仍能实现钯的选择性高效分离。

关键词：钯回收分离废汽车尾气净化催化剂硫代酰胺

同方期刊数据库

在线全文

学校读者我要写书评

暂无评论

采用非甲醛交联剂的棉织物防皱整理研究

染整技术 2006年第7期28卷 9-11,15页

作者：王连军冯愈湖南工程学院化学化工系湖南湘潭411104

采用多种非甲醛交联剂对棉织物进行处理,测定了处理后织物的折皱回复性能、断裂强力、耐氯损性能及白度等。表明在所研究的用于提高织物实用性能的多种非甲醛交联剂中,DHDMEU和DHDEEU是比较理想的交联剂。

关键词：甲醛交联剂棉织物折皱回复性能