Perparation of supported phosphide catalysts and theirs application in biomass hydrodeoxygenation

生物质能因其原料存储丰富，可再生等优势可作为很好的替代能源。但生物质存在大量含氧化合物，极大的影响了热稳定性，限制了其广泛应用。因此需对生物质进行加氢精制处理。过渡金属磷化物催化剂因其具有良好的加氢脱氧性能，近几年来受到广泛关注和研究。 本论文采用溶胶凝胶法和柠檬酸凝胶法分别制备Pd@Ni2P/SiO2和FeMoP/SiO2催化剂。通过CO化学吸附、XRD、XPS、NH3-TPD、STEM等表征对催化剂进行分析，考察了Pd@Ni2P/SiO2和FeMoP/SiO2催化剂对苯酚加氢脱氧以及丙三醇氢解反应的催化性能。 研究表明，Pd@Ni2P/SiO2催化剂颗粒分散均匀（6.75±1.54nm...Biomass has been used as an alternative source of energy due to its rich storage, renewable and other advantages. However, oxygen containing compounds in biomass greatly affects the thermal, and limits its wide application. Therefore, it is necessary to carry out hydrodeoxygenation for biomass. Among these catalysts investigated for hydrorefining, transition metal phosphide catalyst with excellent...学位：工学硕士院系专业：化学化工学院_化学工艺学号：2062013115146

Design and numerical simulation of novelvortex generator

涡街发生体是涡街流量计的关键部件之一,其流体力学外形决定了涡街流量计的量程、精度。设计了一种新型的涡街发生体,并通过CFD软件FLUENT对新型涡街发生体和目前常用的涡街发生体进行数值仿真、理论分析和比较。结果表明:在实际应用中,新型涡街发生体的流体力学性能优于其他涡街发生体,适合高、低流速下产生强度大且稳定的涡街。Vortex generator is an important component of vortex flowmeter.The shape of CFD decides vortex flowmeter's range and accuracy.A novel vortex generator is disigned,its numerical value is simulated and the theory is analysed by FLUENT,and the other common generators are compared with it.As a result,through practical application,the advanced vortex generator has a better performance than others,it is able to make powerful and steady vortexes in low or high Renault value.福建省重大专项前期研究计划资助项目(2005HZ1022

Preparation of Crack-free Inverse-opal Films by Template/Matrix Co-assembly

近年来,由于在光学、电学和生化等领域具有广泛的潜在应用,有序多孔反蛋白石结构薄膜的研究引起了人们的广泛关注.但是其在制备过程中常常会形成一些无法; 控制的缺陷,限制了这类材料的普及和实际应用.通过使用两种基质前驱体(正硅酸乙酯或丝素蛋白)与胶体小球混合共组装,探究了二元体系共组装法制备无裂痕; 反蛋白石结构薄膜的可行性.并用扫描电镜和可见光谱对薄膜结构进行了表征.结果表明,对于正硅酸乙酯体系,在不影响胶体小球有序排列的条件下,正硅酸乙酯; 在小球间的空隙中发生溶胶凝胶转变,与微球共同组装成有序致密的整体,去除微球模板后,可以得到大规模(>200; mum)无缺陷有序的反蛋白石结构薄膜.而对于大分子丝素蛋白体系,由于它和胶体小球有较强的相互作用力,会抑制胶体小球的有序组装,导致无法形成有序结; 构薄膜.对两种二元共组装体系进行了实验探索,实验结果不仅有助于人们了解共组装方式的适用范围,而且为设计和制备无缺陷反蛋白石薄膜提供了新的途径.Recently, there has been a significant interest in utilizing well-ordered, porous inverse-opal films for applications in optical, electronic and (bio) chemical fields. However, uncontrolled defects are always formed during their preparation process, which limit their practical applications. In this work, we examine the feasibility of using template/matrix co-assembly strategies to fabricate crack-free inverse opal thin films. Polystyrene spheres (PS) are chosen as a colloidal template, and two matrix precursors [tetraethoxysilane (TEOS) precursor and regenerated silk fibroin solution] are used for the current study. Our scanning electron microscope (SEM) and optical spectrum results show that, for the TEOS-based system, the resulting silica gel due to the sol-gel transition of TEOS can effectively fill the gap between particles, but cannot affect the self-assembly of PS colloidal particles. After selective removal of the PS template, centimeter-scale crack-free and well-ordered inverse opal films can be obtained. In addition, for a constant concentration of TEOS, the film thickness and order degree of structure can be simply tuned by adjusting the concentrations of colloidal spheres. In comparison with indirect approach through template self-assembly and liquid infiltration, such a co-assembly approach can effectively minimize the associated cracking and avoid the need for matrix infiltration into the preassembled colloidal spheres. On the other hand, macro-molecule silk fibroin has a relatively strong interaction with PS colloidal particles, which is demonstrated by SEM and confocal images. Due to their interaction, silk fibroin molecules are preferably adsorbed on the surface of PS spheres, which can restrain the self-assembly of colloidal particles. As a result, it cannot form well-ordered silk film based on such co-assembly strategy. That is to say, the co-assembly approach is not suitable for systems that matrices have strong interactions with templates. These findings pave the way to use the template/matrix co-assembly strategy for rationally designing and developing crack-free inverse opal films and to apply such well-ordered and porous materials in a variety of fields.National Natural Science Foundation of China [21401154, U1405226]; 111; Project [B16029]; Natural Science Foundation of Guangdong Province; [2014A030310005]; Fundamental Research Funds for the Central; Universities of China [20720170011

临床实验室体液样本库建设

生物样本库是临床医学、基础医学和转化医学研究的基石和重要推动力。临床实验室(检验科)以血液等体液为日常检测对象,拥有丰富的体液标本资源,在体液样本库建设中具有显著优势。临床实验室应推进生物样本库标准操作规程文件撰写,标准化、规范化建设体液样本库,以促进医学检验学科的科研、教学的发展。国家自然科学基金(81101331;81472031

石墨烯微通道散热器的传热特性

为了改善传统微通道散热器的传热特性,提出了一种新型的微通道散热器,相较于传统直通道散热器,不仅增加了横向通道,而且在传热板的下表面覆加了具有超高热导率的石墨烯层,利用数值分析的方法研究添加了横向通道和石墨烯层后的微通道散热器和传统直通道散热器的传热特性。结果表明:横向通道的加入降低了微通道散热器受热面最高温度、最低温度和温差,并且随着热通量的增加,降低幅度增大。石墨烯层的加入使温差大幅度降低,进一步改善了散热效果

软光刻法制备具有表面微结构的角蛋白膜

近年来,使用微纳米制造工艺将蛋白质或多肽进行高精度空间图案化,推动了细胞生物学、组织工程学、药物科学等领域的发展.同时,羊毛角蛋白作为一种储量大的天然生物蛋白质,具有优异的水溶性、良好的生物相容性和可控的降解性,但羊毛角蛋白通常不能自组装形成凝胶网络或其他不溶形式,因此,使用羊毛角蛋白制备如纤维、薄膜、凝胶等的成型结构存在很大困难.本工作通过使用化学修饰的方法,在角蛋白上接枝功能基团,使角蛋白获得光敏感性,探究了共价交联法制备具有表面微结构角蛋白膜的可行性.并用3D激光扫描显微镜、紫外可见近红外光谱仪和傅里叶变换显微红外光谱仪对薄膜结构进行了表征.结果表明,使用软光刻法可以得到表面微结构完整度很高的角蛋白膜.本工作对羊毛角蛋白共价交联法进行了实验探索,实验结果不仅为人们提供了一种软光刻技术制备具有表面微结构的角蛋白膜的方法,而且为羊毛角蛋白制备成型结构提供了新的途径.国家自然科学基金(Nos.21771150,21401154,U1405226)111计划(No.B16029)广东省自然科学基金(No.2014A030310005)中央高校基本业务费(No.20720170011)资助~

旋转玻碳电极上二茂铁的电化学阻抗行为及其与DNA的相互作用

应用旋转圆盘电极和电化学阻抗法研究了二茂铁在Tris-NaC l(pH=7.2)缓冲溶液中于旋转玻碳电极上的电化学阻抗行为及其与DNA的相互作用.结果表明,二茂铁于旋转电极的伏安曲线呈现明显的极限电流平阶,而其交流阻抗谱则出现两个电容弧.二茂铁与DNA的作用,若受扩散过程控制则其极限扩散电流随DNA浓度增大而减小,而在电化学控制过程中则表现为电化学反应电阻随DNA浓度增大而增大.根据旋转圆盘电极和电化学阻抗谱测试,表明由这两种方法数据拟合求得的二茂铁条件电位速率常数能够很好地相互吻合,但如存在DNA时,则其条件电位速率常数有一定程度的减小

Relationship between mannose-binding protein polymorphism and patients with liver cirrhosis and hepatocellular carcinoma

目的探讨甘露糖结合蛋白(MbP)基因突变与肝硬化及肝癌的关系。方法采用聚合酶链式反应-限制性片段长度多态性(PCr-rflP)方法和实时荧光定量PCr(fQ-PCr)技术针对代偿性肝硬化(CC)患者73例、失代偿性肝硬化(dC)患者78例、肝细胞癌(HCC)患者35例和对照组88例健康者的MbP基因第54位密码子多态性进行检测。结果 HCC组的MbP基因ggC/gAC基因型频率和gAC等位基因频率与对照组比较,差异无统计学意义(P>0.05)。CC组、dC组MbP基因ggC/gAC基因型频率和gAC等位基因频率均显著高于HCC组和对照组(P 0.05).GAC allele frequency was also highest prevalence (36.5%) in DC group than that in CC group and HCC group (P < 0.05).Conclusions The MBP codon 54 polymorphism is associated with the progression of liver cirrhosis and might not play an important role in the development of hepatocellular carcinoma.福建省漳州市科技计划资助项目(Z2010085

我国经济增长的风险测算

国家社会科学基金项目(021BTj006)成果之一

约束经营者“道德风险”的博弈分析

国家自然科学基金项目(70272014