Plant-mediated synthesis of silver nanoparticles and its antibacterial applications in textile and polyether sulfone ultrafiltration membranes

目前市场上存在的各种抗菌材料中，银系抗菌剂因其安全、高效、不易产生耐药性以及良好的耐久性，已占据主导地位。纳米银是以纳米技术为基础研制而成的新型抗菌产品，由于量子效应和尺寸效应，具有普通银系抗菌剂无法比拟的抗菌效果。生物还原法是一种近年来发展起来的一种制备金属纳米颗粒的绿色合成方法，该法具有绿色、环保、生物兼容性好等诸多优点。本研究以植物提取液还原制备银纳米颗粒（AgNPs），探讨其粒径的调控规律，并着重研究将其作为抗菌剂应用于织物整理以及聚醚砜（PES）超滤膜改性中的性能。 首先，以黄芩提取液在90℃条件下快速还原硝酸银得到纳米银溶胶，并借助紫外可见吸收光谱（UV-Vis）、X射线衍射（X...Silver-based antimicrobial agents are dominant among various antimicrobial materials on the market due to its safety, highly efficient and less likely to produce drug resistance. Nanosilver, based on nanotechnology, exhibits excellent antibacterial ability on account of the quantum and size effect. Plant-mediated synthesis is a novel green method for preparing metal nanoparticles developed in rece...学位：工程硕士院系专业：化学化工学院_工程硕士(化学工程)学号：2062013115149

布迪厄思想对女权主义的影响

布迪厄是法国当代著名的社会学家,他提出的“场域“、“惯习““、资本“等概念对其他的理论流派产生了很深的影响,包括女权主义流派。女权主义作为一个新兴的理论流派,旨在为广大女性争夺合法权利(力)和地位,摆脱受压迫的地位。旨在从布迪厄概念中的“场域“、“文化资本“、“话语权“和“符号暴力“四个方面来看一下其思想对女权主义在争取女性合法权利(力)过程中有什么样的影响

民族主义视点中的闻一多

闻一多民族主义的生成,源自中国传统文化的哺育,来自对人文精神的价值选择,也和西方民族歧视造成心理上屈辱与激愤,以及由浪漫主义引发的民族主义情绪有内在关联。其文化民族主义具体表现为:警惕、反抗西方殖民文化,以诗勾勒出“现代民族-国家想象“的蓝图,并强化有文化民族主义内涵的图腾、符号、意象,以诗作凝聚民族奋起的伟力。闻一多文化民族主义有其特色,它是弹性的、兼容的文化民族主义,是与新人文主义交融的文化民族主义,是与家族主义相抗衡的新的民族主义

Structural Analysis of ZnS Thin Film Prepared by Thermal Evaporation

用双舟热蒸发制备了掺稀土硫化锌薄膜，用X射线衍射技术对硫化锌粉末和所制薄膜的晶体相结构进行研究，发现硫化锌薄膜的晶体结构与硫化锌粉末的晶体结构不同。薄膜晶体的生长受诸多因素影响，有择优取向生长趋势，是二维层状结构沿C轴方向的密堆积。这些研究为高新材料的研制提供了参考。ZnS thin films doped with erbium are prepared by thermal evaporation with two boats , and the crystalline phase structures of ZnS powder and the prepared films are studied using x-ray diffraction technique.lt is found that the structure of ZnS film is dif- ferent from that of ZnS powder.The growth of film crystal is affected by numbers of factors and tends to a preferential orientation.The film is two-dimensional layer struc- ture packing along c axis.lt provides basis for research on new luminescence material with high efficiency.福建省自然科学基

Distribution and Seasonal Variations of Chromophoric Dissolved Organic Matter （CDOM） in the Bohai Sea and the North Yellow Sea

UV-Vis spectral data and a fluorescence excitation-emission matrix (EEM) was analyzed for the surface, middle, and bottom layer water samples from the Bohai Sea and North Yellow Sea in April, August, and December of 2016 and February of 2017. Distribution characteristics, influencing factors, and seasonal variation of CDOM in the study area were investigated. The results showed that the horizontal distributions of CDOM are similar in different seasons, showing a characteristic of high levels near shore and low levels in the offshore region. Strong correlations were observed between value a (355) and spectral slope S275-295, indicating that CDOM is significantly affected by land input. According to the vertical distribution, the CDOM level is the lowest in surface seawater in summer due to strong photo-degradation. In February, controlled by primary productivity, the lowest level of CDOM was found in the bottom seawater. From April 2016 to February 2017, the content of CDOM first increased and then decreased. Its concentration was highest in December. Seasonal variations are mainly controlled by land input and on-site production. According to analysis of the spectral slope S275-295, the average molecular weight of CDOM in winter was smallest in February, which was mainly related to the drastic reduction of land-based input at that time. The strong photo-degradation in summer resulted in a small average molecular weight of CDOM

The comprehensive extraction of useful substances from Tenebrio molitor and comparison of extraction methods

比较了用石油醚和用环己烷抽提黄粉虫TenebriomolitorL .虫粉中脂肪的提取率 ,以及用碱法和用酶法提取去脂虫渣中蛋白质的提取率。并从 2种去脂、去蛋白质虫渣中和虫蜕中提取壳聚糖。用环己烷和酶法提取为最佳组合 ,可综合提取出占幼虫干重 5 0 .5 %的有效物质。同时 ,讨论了碱法和酶法提取率出现差异的原因。The fat extraction rates of the solvents light petroleum and cyclohexane, and the protein extraction rates of the alkaline and enzyme extraction methods, were compared. Chitosan was extracted from two kinds of fat and protein obtained from larval residues and from the larval moult respectively. The optimum combination of extraction was cyclohexane and enzyme extraction; 50.5% of the constituent substances of dried larvae were obtained in this way. The reasons for the different extraction rates of the alkaline and enzyme extraction methods are discussed.福建省教育厅资助项目 (编号 :J12 38);; 泉州市科委资助项目 (编号 :Z2 0 0 10 13)

ZnNi/HZSM-5催化剂上混合C_4烃的芳构化反应

考察了ZnNi/HZSM 5催化剂制备方法和反应条件对混合C4烃芳构化反应的影响 ,并探讨了反应机理。结果表明 :(1)在ZnNi/HZSM 5催化剂制备过程中 ,采用先浸渍Zn2 + 后浸渍Ni2 + 的方法可以获得性能好的催化剂 ;(2 )混合C4烃在ZnNi/HZSM 5上的芳构化反应有最佳温度范围 ,在该温度范围内可以获得高的BTX的收率及选择性 ;(3)低的质量空速有利于芳构化反应 ,空速升高会因催化剂结焦而使BTX的收率及选择性下降 ;(4)在优化的反应温度 5 2 0～ 5 4 0℃、质量空速 1 0h-1,以及常压非临氢的条件下连续反应 6h ,芳烃收率平均值为 4 5 %～ 5 6 % ,BTX收率达 4 0 %～ 4 6 % ,液态烃中芳烃含量达 97%～ 99%

轻质烃在双功能ZnNi/HZSM-5催化剂上的芳构化

考察了混合碳四烃、石油液化气和正己烷在双功能ZnNi/HZSM -5催化剂上的芳构化 ,同时首次将微波辐射技术应用到芳构化中 ,并分别研究了混合碳四烃和正己烷在两种加热方式下的芳构化催化行

微波诱导催化轻质烃芳构化

研究了在常规加热和微波辐射两种不同加热方式下ZnNi/HZSM 5催化剂上混合碳四烃及正己烷芳构化反应的性能 .考察了高 /径比、反应温度及反应时间对反应性能的影响 .探讨了微波辐射诱导催化反应的作用机理

Investigation of Zinc SulFide Thin Film with XPS Analysis Method

运用XPS法研究znS：Cu，Cl，Er薄膜器件的界面态及所掺激活剂的纵向分布，认为氧吸附形成的znS薄膜的表面构态是产生薄膜界面态和界面陷阱能级的主要原因，对研究薄膜器件的激发过程有参考意义。The interFace states in ZnS:Cu,Cl,Er thin Film and the longitudinal distribution of the activators doped in the Film are investigated with XPS analysis method in this paper.It is considered that the surFace structure states Fromed by oxygen absorption are the main cause of inducing interFace states and energy levels of interFace traps.The results are reFerable in study of the electroluminescent excitation process of the thin Film devices.福建省自然科学基