检索结果-南通市图书馆

Journal of Environmental Sciences 2010年第5期22卷 723-730页

作者： jinhua jiang Shidi Shi Tao Chen Department of Environmental Engineering Taizhou College Linhai 317000 China Environment Monitoring Center of Taizhou Jiaojiang 318000 China

We measured 39 polybrominated diphenyl ethers （PBDEs） in the muscle tissue of three species of fish （Sciaenops ocellatus,Sparus macrocephalus,and Lateolabrax japonicus） and four species of shellfish （Tegillarca granosa,Cyclina sinensis,Sinonovacula constricta,and Ostrea cucullata） that were collected downstream of electronic-waste recycling plants in Taizhou,China.A total of 24 PBDE congeners （PBDE 24） in the samples were *** PBDE 24 （total PBDE） ranged from 545.4 to 1688.7 ng/kg ww （wet weight）.The mean PBDE 24 concentration was 1382.6 ng/kg ww in fish and 858.1 ng/kg ww in *** lower brominated congeners were detected at relatively high concentrations in all *** penta-products,produced from e-waste,were found at relatively low levels.A principal component analysis suggested a significant correlation among di-,tri-,tetra-,and hepta-BDEs for the three species of ***,we found a significant correlation between mono-and tri-BDEs in the *** results suggested that the processes of PBDE metabolism and elimination were similar in both fish and *** addition,the primary source of PBDEs appeared to be from the debromination of high brominated PBDEs.

关键词： bioaccumulation polybrominated diphenyl ethers congener

Bioaccumulation of polychlorinated biphenyls in prawns and a mud crab from mixed-aquaculture ponds

在线全文

学校读者我要写书评

暂无评论

Acta Oceanologica Sinica 2009年第6期28卷 111-117页

作者： jiang jinhua Environmental Engineering Department Taizhou College Linhai 317000 China

The bioaccumulation of ten polychlorinated biphenyl （PCB） congeners was investigated within different tissues in three prawns （Penaeusorientalis Kishinouce, Laomedia astacina de Haan and Penaeus vannamei Boone） and one mud crab （Scylla serrata Forsskal） from mixed-aquaculture ponds in Taizhou in April 2007. The average concentrations （wet mass） of ∑ PCBs in muscle, head, and rind tissues for mean among these prawn species were 7.04, 21.16, and 11.47 ng/g, respectively. The average concentrations of ∑ PCBs in muscle, branchia, and spawn in Scylla serrata were 6.49, 21.13, and 19.76 ng/g, respectively. The concentrations of CB28 were the highest in prawn tissues （2.40 ng/g）, and accounted for 18.60% of ∑ PCBs. The concentration of CB52 was the lowest. The application of principal component analysis （PCA） for the estimation of PCB sources of contamination resulted in first component main contributions of CB101, CB153 and CB28 in the muscle, head, and rind in combined prawn samples, respectively. The enrichment level of PCBs for different tissues varied greatly. The accumulation coefficient of ∑ PCBs in prawn muscle, head, and rind tissues were 396.35, 1 191.79, and 645.91, respectively. For the Scylla serrata, the accumulation coefficients were 365.81, 1 190.50, and 1 113.31 for muscle, branchia, and spawn tissues, respectively. For prawns, the accumulation coefficient of CB153 was the highest in muscle tissues, while CB155 had the highest coefficients in the head and rind tissues. The CB155 coefficient was the highest in spawn tissues of the mud crab.

关键词： bioaccumulation polychlorinated biphenyls prawn Scylla serrata

Influence of Heat Setting on Mechanical and Structural Properties of Polypropylene Hernia Mesh

在线全文

学校读者我要写书评

暂无评论

Journal of Donghua University(English Edition) 2018年第2期35卷 124-128页

作者： ZHU Xiaoqian CHEN Nanliang jiang jinhua College of Textiles Donghua University Shanghai 201620 China Engineering Research Center of Technical Textiles Ministry of Education Donghua University Shanghai 201620 China

Heat setting has important effects on mechanical and structural properties of polypropylene( PP) mesh. However,there is no systematic study on the effects of heat setting. In this paper,the orthogonal array was designed for heat setting,and the influences of heat setting on structural, mechanical properties and flexural rigidity of PP mesh were studied. The experimental results showed that temperature had larger influence than tension and time on thickness,tensile strength,bursting strength, tear strength and bending stiffness of PP meshes, except the fabric weight. The optimum heat setting parameters were as follows: temperature was120 ℃, time was 10 min,and tension was small. These results will provide guideline for the selection of heat setting parameters.

关键词： hernia mesh heat setting orthogonal experiment method meclumical property structural property

ADSORPTION OF GALLIUM WITH N_503LEVEXTREL RESIN

在线全文

学校读者我要写书评

暂无评论

中国有色金属学会会刊：英文版 1994年第3期4卷 36-40页

作者： Chen, Jianrong Hu, Jianhua Peng, Chaoqun(Department of Chemistry,Zhe jiang Normal University,jinhua 32100 4)

ＡＤＳＯＲＰＴＩＯＮＯＦＧＡＬＬＩＵＭＷＩＴＨＮ＿５０３ＬＥＶＥＸＴＲＥＬＲＥＳＩＮＣｈｅｎ，Ｊｉａｎｒｏｎｇ；Ｈｕ，Ｊｉａｎｈｕａ；Ｐｅｎｇ，Ｃｈａｏｑｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，Ｚｈｅｊｉａ... 详细信息

ＡＤＳＯＲＰＴＩＯＮＯＦＧＡＬＬＩＵＭＷＩＴＨＮ＿５０３ＬＥＶＥＸＴＲＥＬＲＥＳＩＮＣｈｅｎ，Ｊｉａｎｒｏｎｇ；Ｈｕ，Ｊｉａｎｈｕａ；Ｐｅｎｇ，Ｃｈａｏｑｕｎ（ＤｅｐａｒｔｍｅｎｔｏｆＣｈｅｍｉｓｔｒｙ，ＺｈｅｊｉａｎｇＮｏｒｍａｌＵｎｉｖｅｒｓｉｔ...

关键词： gallium adsorption N503 levextrel resin

Characterization of Oxygen Plasma Modified Polyimide Fibers Interfacial Adhesion Performance by Single Fiber Fragmentation Test

在线全文

学校读者我要写书评

暂无评论

Journal of Donghua University(English Edition) 2018年第5期35卷 361-364页

作者： DU Xiaodong jiang jinhua CHEN Nanliang LIU Yanping Engineering Research Center of Technical Textiles Ministry of EducationDonghua University College of Textiles Donghua University

The application of polyimide( PI) fibers in the field of composite materials has been limited because of their smooth surface and chemical inertness. In order to overcome these problems,oxygen plasma was used to modify the surface of fibers. The single fiber fragmentation test( SFFT) was used to characterize the interfacial adhesion performance of PI fiber as a simple and accurate analysis method. It was found that the interfacial shear strength between the fiber and resin after oxygen plasma modification was increased by 54% compared to the untreated fiber. Meanwhile, the surface micromorphology,chemical composition, wettability of fibers and the interface morphology at the fiber fracture were analyzed by field emission scanning electron microscope( FESEM), X-ray photoelectron spectroscopy( XPS),contact angle measurement and polarizing microscope,respectively. All of these results demonstrated that the single fiber fragmentation test for analyzing the interfacial adhesion of PI fibers was effective.

关键词： single fiber fragmentation test(SFFT) polyimide(PI)fibers oxygen plasma treatment interfacial shear strength

Mechanical Properties of Weft-Knitted Spacer Fabrics Integrated with Silica Aerogels

在线全文

学校读者我要写书评

暂无评论

Journal of Donghua University(English Edition) 2019年第6期36卷 559-563页

作者： SYED Rashedul Islam YU Weidong jiang jinhua MOHAMMAD Abu Nasir Rakib Department of Textile Engineering College of TextilesDonghua UniversityShanghai 201620China Key Laboratory of Textile Science&Technology Ministry of EducationShanghai201620China

The work investigated surface and mechanical properties of untreated and treated three-layered weftknitted spacer *** order to optimize the mechanical properties of weft-knitted spacer fabrics,silica aerogels(SAs)coating was *** electron microscopy(SEM)images of untreated and treated spacer fabrics were analyzed to ensure the presence of SAs on the coated spacer *** basic properties of uncoated and coated weftknitted spacer fabrics were studied and *** strength and initial modulus were studied according to the GB/T3923 test standard YG026 MB-250 by testing ***,compression properties of spacer fabrics were also tested by HD026 G test *** this testing,work of compression,the linearity of compression,recovery work of compression and other parameters were calculated from stress and strain *** was found that SAs coating has a significant influence on the mechanical properties of weftknitted spacer *** statistical analysis also verified the significant performance(P value smaller than 0.05)of treated fabric samples at the 0.05 level.

关键词： 3D weft-knitted spacer fabrics silica aerogels(SAs)coating tensile strength initial modulus compression properties

在线全文

学校读者我要写书评

暂无评论

泥鳅池塘无公害高产、高效养殖技术

科学养鱼 2011年第3期33卷 29-30页

作者：姜进华山东临沂市兰山区水务局 276000

泥鳅属鲤形目、鳅科、花鳅亚科、泥鳅属,又名鳅、真泥鳅等。其肉质清淡鲜美、营养丰富,属高蛋白、低脂肪的水产佳品,是我国外贸出口的重要水产品之一。为探讨泥鳅养殖技术,提高养殖的经济效益,2008年,临沂市润兴特种水产养殖场在兰山区... 详细信息

泥鳅属鲤形目、鳅科、花鳅亚科、泥鳅属,又名鳅、真泥鳅等。其肉质清淡鲜美、营养丰富,属高蛋白、低脂肪的水产佳品,是我国外贸出口的重要水产品之一。为探讨泥鳅养殖技术,提高养殖的经济效益,2008年,临沂市润兴特种水产养殖场在兰山区水务局渔技站的指导下,开展池塘泥鳅养殖试验,养殖泥鳅大部分出口日本、韩国，取得了显著的经济效益，现将主要技术总结如下：

关键词：高效养殖技术泥鳅池塘无公害外贸出口经济效益水产养殖场营养丰富

A HIGHLY EFFICIENT SYNTHESTS OF (2E)-α,β-UNSATURATED AMIDES

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 1994年第3期5卷 181-182页

作者： Jin Xing DU Xian HUANG(Departmeot of Chemistry,Zhe jiang Normal University,jinhua 321004)(Depertment of Chemistry,Hangchou University,Hangchou, 310028)

The coupling reaction of aryl iodides with N-dialkyl substituted acrylamides in the presence of micro amount of bis(benzonitrile) dichoropatladium [PdCl2(C6H5CN)2] under solid-liquid phase-transfer conditions gave th...

关键词：

在线全文

学校读者我要写书评

暂无评论

浅谈龙滩水电工程征地移民工作

水力发电 2006年第9期32卷 78-80,86页

作者：蒋锦华龙滩水电开发有限公司广西南宁530023

龙滩水电站水库淹没涉及贵州、广西两省区,淹没面积大、移民人数多。据此,征地补偿及移民安置工作实行“政府负责、投资包干、业主参与、移民监理”的管理体制,移民安置分区规划和分阶段实施,统一了实物指标补偿标准,重视移民资金的使... 详细信息

龙滩水电站水库淹没涉及贵州、广西两省区,淹没面积大、移民人数多。据此,征地补偿及移民安置工作实行“政府负责、投资包干、业主参与、移民监理”的管理体制,移民安置分区规划和分阶段实施,统一了实物指标补偿标准,重视移民资金的使用及管理,并实行移民综合监理制。结合工作实践,提出了在市场经济体制下,做好征地与移民搬迁安置工作的若干意见和建议。

关键词：征地移民安置移民政策水电建设龙滩水电站

在线全文

学校读者我要写书评

暂无评论

小型水库高产高效模式化养殖技术

科学养鱼 2010年第4期32卷 16-17页

作者：姜进华山东临沂市兰山区水务局 276000

为充分挖掘小型水库生产潜力,在保证农业灌溉的前提下,调整渔业生产结构,提高养殖经济效益,2006年山东省临沂市兰山区水务局承担了市科委下达的＂小型水库高产高效模式化养殖技术研究＂项目,

关键词：养殖技术小型水库模式化生产潜力农业灌溉生产结构经济效益水务局