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锂离子电池硅电极新型粘合剂的研究进展

上海电力学院学报 2020年第1期36卷 17-25页

作者：王保峰汪浩立吴宝柱邰子阳上海电力大学环境与化学工程学院

硅(Si)作为目前理论容量最高的一种负极材料,被认为是最有前景的一种锂离子电池负极材料,但较大的体积膨胀和较差的导电性限制了其在锂离子电池当中的应用。在硅电极体系中,选择一种合适的粘合剂对于硅电极的机械完整性和电子完整性起... 详细信息

硅(Si)作为目前理论容量最高的一种负极材料,被认为是最有前景的一种锂离子电池负极材料,但较大的体积膨胀和较差的导电性限制了其在锂离子电池当中的应用。在硅电极体系中,选择一种合适的粘合剂对于硅电极的机械完整性和电子完整性起着至关重要的作用。总结了硅负极材料的容量衰减机理,介绍了粘合剂结构的不同对硅电极性能的影响以及新型的导电粘合剂在硅电极方面的应用。

关键词：硅电极容量衰减结构粘合剂锂离子电池

Height Detection and Analysis of Water Flowing Fractured Zone of Coal Face

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Computational Water, Energy, and Environmental Engineering 2021年第4期10卷 131-139页

作者： ziyang Feng College of Resources Shandong University of Science and Technology Tai’an China

Taking 91105 working face as the research object, the observation method of water flowing fractured zone and the layout of mining holes were determined by analyzing the field geological structure. It was shown that the fractured zone height and the ratio given by the measured method were 52.33 and 12.46, respectively. By the numerical simulation method with the software of UDEC, the fractured zone height and the ratio were 42.5 and 10.12. By comparison of measured height data and UDEC numerical simulation, there were some differences between the measured height and the calculated results of UDEC numerical simulation method. The method of simulation can be used as the technical basis for the design of waterproof coal pillar in the future.

关键词： Water Flowing Fractured Zone Height Detection Fracture Mining Ratio Numerical Simulation

Chitin deacetylase:from molecular structure to practical applications

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Systems Microbiology and Biomanufacturing 2022年第2期2卷 271-284页

作者： ziyang Huang Xueqin Lv Guoyun Sun Xinzhu Mao Wei Lu Yanfeng Liu Jianghua Li Guocheng Du Long Liu Key Laboratory of Carbohydrate Chemistry and Biotechnology Ministry of EducationJiangnan UniversityWuxi 214122China Science Center for Future Foods Jiangnan UniversityWuxi 214122China Shandong Runde Biotechnology Co. Ltd.Tai’an 271000China

Chitosan and chitooligosaccharides(COS),as derivatives of chitin through deacetylation reaction,have broad applications due to their good biodegradability,biocompatibility,and *** addition,chitosan and COS are involved in cell wall morphogenesis and host–pathogen interactions in *** deacetylases(CDAs)are enzymes that can catalyze the deN-acetylation of *** are widely distributed in protozoa,algae,bacteria,fungi,and insects with important physiological *** with the traditional chemical method,enzymatic catalysis by CDAs provides an enzymatic catalysis method to produce chitosan and COS with controllable deacetylation site and environmental *** characteristics attract researchers to produce CDAs by fungicides or ***,researches on heterologous expression and directed evolution of CDAs are still *** this review,we summarize the latest knowledge of CDAs,especially for heterologous expression systems and directed evolution strategies,which may contribute to the industrial production and future application of CDAs.

关键词： Chitin deacetylases Chitosan Chitooligosaccharides Heterologous expression Directed evolution

Quantifying the ambient formaldehyde sources utilizing tracers

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Chinese Chemical Letters 2014年第11期25卷 1489-1491页

作者： Mei Li Min Shao Ling-Yu Li Si-Hua Lu Wen-tai Chen Chen Wang State Joint Key Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University

Formaldehyde（HCHO） is one of the most important intermediate products of atmospheric photochemical reactions in the troposphere, therefore understanding of HCHO sources is essential for effective ozone control measures. The objective of this work is to distinguish between primary and secondary sources of HCHO. Based on about one month of online measurements in winter in ziyang,Sichuan, the multi-linear regression analysis of ambient concentrations of HCHO and possible tracers（acetonitrile, propane and peroxyacetyl nitrate） was performed. The results show that during winter in ziyang, biomass burning contributed an average of 53.2% to ambient HCHO levels, while secondary processes contributed about 30.1%, and vehicular sources accounted for 7.1%.

关键词： Formaldehyde Sources Tracers Multi-linear regression

Mantle plume:the dynamic setting of the origin of Early Paleozoic mafic dykes in ziyang,Shaanxi Province,Southern Qinling Block,China

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Acta Geochimica 2020年第3期39卷 307-325页

作者： Xiaoqing Chen Shen Liu Caixia Feng Ian M.Coulson Yan Fan Kairui tai Tianjing Gao Siyuan Zhang College of Earth Science Jilin UniversityChangchun 130061China State Key Laboratory of Continental Dynamics and Department of Geology Northwest UniversityXi'an 710069China Solid Earth Studies Laboratory Department of GeologyUniversity of ReginaReginaSK S4S 0A2Canada

The mafic dykes(dolerites)during the Early Paleozoic are widely spread in Langao-ziyang,southern Qiling Block,and the investigation on these dykes are very *** studies have mainly focused on the Silurian mafic dykes;however,research on the Earlier Paleozoic mafic dykes is relatively weak at ***,the overall understanding of the mantle source and genetic dynamic setting during the Early Paleozoic in this area is *** study the accurate age and origin of the Early Paleozoic mafic dykes in ziyang,southern Shaanxi Province,the mafic dykes from dabacunand Qinmingzhai were selected and the petrology,zircon U-Pb chronology,geochemistry,and Sr-Nd-Hf isotopes were *** indicates that the mafic dykes studied are mainly composed of dolerite,and they are the products of the Early Ordovician(475.8-480.7 Ma).Furthermore,the dolerites belong to alkaline rock series,and they are characterized by enrichment in LREE,Rb,Ba,Sr,Nb,(87Sr/86Sr)i=0.7020-0.7050,εNd(t)=3.0-4.0),εHf(t)=4.5-12.1,176Hf/177Hf=*** suggests that the mafic dyke were derived from the partial melting of a depleted lithospheric mantle,and the genetic process is mainly controlled by the mantle plume based on the discussion of the genetic ***,the genetic process experienced the separation and crystallization of olivine and clinopyroxene at the same time,with little crustal contamination.

关键词： Early Paleozoic Dolerites Geochemistry Origin Mantle plume

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GK_(1C改)型机车车体模块化设计

内燃机车 2008年第12期 19-21,25页

作者：江太宏资阳机车有限公司技术中心四川资阳641301

对目前资阳机车有限公司生产的GK型调车机车车体存在的问题进行了分析,阐述了GK1C改型机车车体模块化设计的具体方法及结果,对设计中的不足提出了改进措施。GK1C改型机车车体模块化设计的成功,为干线机车车体模块化设计提供了借鉴。

关键词： GK1C改型机车车体模块化设计

特高压交流输电线路线下钢架建筑的感应电压、电流仿真分析

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高电压技术 2021年第2期47卷 724-731页

作者：王冉冉徐静李子扬刘晓林马芳胡安瑞山东农业大学机械与电子工程学院泰安271018 山东电力工程咨询院有限公司济南250014

根据目前建成投运的1000 kV榆横—潍坊特高压交流输电线路运行情况,线路下存在大棚等钢架结构建筑物时,其内钢架结构会产生很大的感应电流。为保证农业生产人员的安全工作,以钢架大棚为例,利用Ansys仿真软件建立了结合无限元的特高压交... 详细信息

根据目前建成投运的1000 kV榆横—潍坊特高压交流输电线路运行情况,线路下存在大棚等钢架结构建筑物时,其内钢架结构会产生很大的感应电流。为保证农业生产人员的安全工作,以钢架大棚为例,利用Ansys仿真软件建立了结合无限元的特高压交流双回输电线路计算模型,仿真计算线路下方钢架上产生的感应电压和感应电流大小。分析表明:利用有限元–无限元相结合的方法进行建模仿真,计算机的仿真效率提升明显;线路下方钢架结构建筑上的感应电压和感应电流密度受线路运行电流等级、钢架与线路轴线距离的影响较大;线路架设高度对感应电压和感应电流的影响随着钢架距离线路轴线距离的不同呈现出不同变化;综合考虑线路架设成本和输电效率等因素,建议将线路设计在距离建筑70 m以外。

关键词：特高压 Ansys 大棚钢架电磁感应电压感应电流密度

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欧李果胶理化特性及乳化性质

食品科学 2021年第20期42卷 15-21页

作者：张士凯何子杨秦伟帅程月许方舟李来成吴澎山东农业大学食品科学与工程学院山东省高校食品加工技术与质量控制重点实验室山东泰安271018 泰山学院生物与酿酒工程学院山东泰安271000

以商品苹果果胶(commerci alapple pectin,CAP)为对照,研究欧李果胶(Cerasus humilis fruit pectin,CSP)的结构、理化性质及乳化特性。与CAP对比,所得CSP半乳糖醛酸质量分数为70.42%,含有更高含量的金属元素(Ca、Zn、Mg)、蛋白质和总多... 详细信息

以商品苹果果胶(commerci alapple pectin,CAP)为对照,研究欧李果胶(Cerasus humilis fruit pectin,CSP)的结构、理化性质及乳化特性。与CAP对比,所得CSP半乳糖醛酸质量分数为70.42%,含有更高含量的金属元素(Ca、Zn、Mg)、蛋白质和总多酚(P<0.05)。通过扫描电镜、傅里叶变换红外光谱、气相色谱-质谱联用、X射线衍射等结构表征表明,CSP表面呈光滑、连续和卷曲的片状或丝状结构,为高甲氧基果胶(酯化度52.04%),具有无定形性质,阿拉伯糖(65.7%)、半乳糖(18%)和鼠李糖(11%)为其主要的3种中性单糖。此外,通过测定CSP的Zeta电位值和其乳液体系的乳化指数、乳化能力、乳化稳定性、显微结构、液滴粒径及流变学性质,探究CSP的乳化性质。结果显示,CSP具有较好的乳化性质,可作为乳液体系的天然乳化剂,具有巨大潜力。

关键词：果胶结构表征理化性质乳化性质乳化剂

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含硒、锗保健笋培育试验初报

浙江林业科技 2005年第5期25卷 24-26页

作者：杨校生石全太中国林业科学研究院亚热带林业研究所浙江富阳311400

通过对立竹基部竹腔注入亚硒酸钠或锗的溶液后,该竹所生产的竹笋体内硒或锗总量有明显增加,红哺鸡竹、白哺鸡竹、黄杆乌哺鸡竹、雷竹所生产的笋含硒总量平均达到0.64×10-6,相当于陕西省紫阳富硒茶含硒量(平均值为0.65×10-6).其中,竹... 详细信息

通过对立竹基部竹腔注入亚硒酸钠或锗的溶液后,该竹所生产的竹笋体内硒或锗总量有明显增加,红哺鸡竹、白哺鸡竹、黄杆乌哺鸡竹、雷竹所生产的笋含硒总量平均达到0.64×10-6,相当于陕西省紫阳富硒茶含硒量(平均值为0.65×10-6).其中,竹笋内有机硒的含量为(0.031 ～ 0.234)×10-6;试验表明,不同竹种具有不同的富集硒和锗的能力,应选择适宜的注射溶液浓度和竹子品种,以生产富硒或富锗竹笋,使之符合人体的最佳需要.

关键词：竹子无机硒有机硒