Isolation, purification and structure analysis of the polysaccharides from the bio-contorl agent, Peacilomyces ilacinus

筛选到一株对枯萎病病原菌-尖孢镰刀菌（Fusariumoxysporum）具有拮抗抑制作用的淡紫拟青霉（Peacilomycesilacinus）菌株NH-PL-03，抗性物质初步筛选结果表明其胞外粗多糖具有抑菌活性。本论文对该菌株的胞内、外多糖进行了提取、纯化研究，并对纯化所得的两个单组分多糖IP-1和EP-1进行了结构分析以及抑菌活性测定。主要研究内容与结果如下： 1、通过形态学和rDNA-ITS序列分析，鉴定出分离保存的菌株为淡紫拟青霉。对其培养特性进行了研究。 2、淡紫拟青霉发酵液的胞内、胞外物质经过醇析法加乙醇3倍即可得到多糖粗提物。经过测试反应验证，该粗提物为多糖，并具有凝胶多...An anti-Fusarium oxysporum activity strain NH-PL-03 of Paecilomyces lilacinus was obtained by screening from the soil in Fuzhou City of Fujian Province in 2003. The results showed that the crude extracelluar polysaccharide of NH-PL-03 strain had antifungal activity to F. oxysporum. In this dissertation, the extraction and purification of polysaccharides from P. lilacinus were conducted. Two monoco...学位：理学硕士院系专业：生命科学学院生物化学与生物技术系_生物化学与分子生物学学号：K20014503

Study on the rheology of xanthan and synergistic interaction with konjac gum and other gum

研究前期筛选获得一株多糖胶质高产菌Xanthomonas axonopodis所产的黄原胶FJAT-10151-DTJZ的品质,为该黄原胶的开发应用提供基础数据及参考。通过分析浓度、剪切速率、p H、加热温度、时间、冻融处理等对FJAT-10151-DTJZ粘度的影响研究其流变性,并研究其与结冷胶、黄原胶、凝胶多糖、瓜尔豆胶、刺槐豆胶、魔芋胶、果胶和壳聚糖8种胶的协效性。实验结果表明,FJAT-10151-DTJZ溶液的粘度随浓度的升高而升高,且为非牛顿流体;当FJAT-10151-DTJZ的浓度为1%时,其粘度为343 m Pa·s;p H、冻融对FJAT-10151-DTJZ的粘度影响不大;FJAT-10151-DTJZ的最佳加热温度为75℃;粘度随加热时间先增大后减小,当加热温度为75℃,加热时间为150 min,1%浓度的FJAT-10151-DTJZ溶液的粘度为808 m Pa·s。FJAT-10151-DTJZ只与魔芋胶有强烈的协同增效作用,与壳聚糖、结冷胶、黄原胶、凝胶多糖、瓜尔豆胶、刺槐豆胶、果胶无协效性。A Xanthomonas axonopodis strain producing xanthan gum had been screened,and researched the quality of xanthan gum FJAT-10151-DTJZ in order to provide basic data and reference for development and application. The rheology properties of FJAT-10151-DTJZ were discussed according to the viscosity variation with different conditions including concentration,shearing,p H,heating temperature,heating time and freezingthawing. The synergistic interactions of FJAT-10151-DTJZ with chitosan,gellan gum,xanthan gum,curdlan,guar gum,locust bean gum and pectin were also investigated. The results showed that polysaccharide gum solution FJAT-10151-DTJZ was non-Newton fluid. It's viscosity rised with its concentration and reached to343 m Pa·s when the concentration was 1%. The p H change and freezing-thawing played negligible effects on its viscosity. Its viscosity was 808 m Pa·s when it was heated at 75 ℃ for 150 min. Besides,FJAT-10151-DTJZ had no synergistic interaction with chitosan,gellan gum,xanthan gum,curdlan,guar gum,locust bean gum and pectin except konjac gum.国家948项目(2014-Z48);; 福建省公益类科研院所专项(2015R1018-2);; 福建省农业科学院科技创新项目(2015CX-7

An Overview of the Concept of Regional Sediment Management

就"区域沉积物管理"(简称RSM) 概念与方法进行了系统论述,以厦门地区为例阐述了 RSM 研究的必要性和重要性,并对如何应用区域沉积管理来处理海岸冲刷、淤积与港口码头建设过程中可能遇到的问题进行了深入浅出的讨论,同时,提出了发展 RSM 的战略构想与框架。In this article we described the concept of "regional sediment management" (RSM), and identified opportunities for and impediments to implementing regional approaches to sediment management, and also summarized the background information and applications of RSM. Furthermore, we considered the needs of RSM studies and, suggested the framework for developing RSM strategies, and described the specific studies for the Xiamen region

Electrochemical Impedance Spectroscopic Studies of the First Lithiation of Si/C Composite Electrode

采用球磨法制备了SI/C复合材料,X射线衍射(Xrd)和扫描电子显微镜(SEM)测试结果显示SI/C复合材料中硅保持着良好的晶体结构且均匀的分散于炭黑基体中.充放电测试结果表明SI/C复合材料首次放电容量高达3393 MAH/g,4周之后可逆容量均保持在1000 MAH/g左右,表现出较好的循环性能.电化学阻抗谱测试结果显示,SI/C复合材料电极在首次嵌锂过程中分别出现了代表接触阻抗、固体电解质相界面界面膜(SEI膜)阻抗、电荷传递阻抗和相变阻抗的圆弧,并详细分析了它们的变化规律.The Si/C composite materials were prepared by ball milling method,and characterized by X-ray diffraction(XRD) and scanning electron microscopy(SEM).The result displayed that Si in the Si/C com-posite materials still maintained a good crystal structure and uniformly dispersed in carbon black matrix.The first discharge capacity was 3393 mAh/g,and 4 cycles later still retained 1000 mAh/g,showing better charge-discharge cycle performance.Electrochemical impedance spectroscopy test indicated that there ap-peared three semicircles respectively representing the impedance of contact problems,solid electrolyte in-terface film(SEI film),charge transfer and phase transformation in the first lithiation,and their evolutive principles were also investigated.中央高校基本科研业务费专项资金(Nos.2010LKHX03;2010QNB04;2010QNB05);中国矿业大学科技攀登计划(No.ON090237);江苏省普通高校研究生科研创新计划(No.CX10B_153Z)资助项

Electrochemical Impedance Spectroscopic Studies of the First Lithiation of Si/C Composite Electrode

The Si/C composite materials were prepared by ball milling method, and characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM). The result displayed that Si in the Si/C composite materials still maintained a good crystal structure and uniformly dispersed in carbon black matrix. The first discharge capacity was 3393 mAh/g, and 4 cycles later still retained 1000 mAh/g, showing better charge-discharge cycle performance. Electrochemical impedance spectroscopy test indicated that there appeare three semicircles respectively representing the impedance of contact problems, solid electrolyte interface film (SEI film), charge transfer and phase transformation in the first lithiation, and their evolutive principles were also investigated