Now showing items 21-40 of 209

    • 斜卧青霉L-06内切葡聚糖酶Ⅰ基因的克隆与表达 

      刘韫滔; 韩学凤; 罗泽宇; 邱玉峰; 龙敏南; 胡忠 (2012)
      【目的】克隆斜卧青霉l-06的内切葡聚糖酶Ⅰ基因(EgI),并实现其在大肠杆菌内的高效表达。【方法】利用rT-PCr技术克隆了斜卧青霉l-06的内切葡聚糖酶Ⅰ基因(EgI),并将EgI基因克隆到原核表达载体中,构建了重组质粒PET32A-EgI。【结果】转化至大肠埃希菌rOSETTA(dE3),经IPTg诱导重组蛋白表达,SdS-PAgE检测结果表明:重组表达产物的相对分子质量约为80 kd,与预期相符。重组表达的菌悬液,经破碎离心,取 ...
    • 生物油萃取分离技术的研究进展 

      吕东灿; 刘运权; 王夺; 袁亮 (2012)
      综述了国内外采用萃取技术分离生物油的研究进展,包括水萃取、有机溶剂萃取、络合萃取、超临界萃取、柱层析萃取等,总结了这些萃取方法的优点和缺点。指出可通过对生物质热解过程本身进行改进,如对原料进行预处理、引入催化剂进行催化热解、对热解蒸汽进行分级冷凝等,以获得富含目的产物组成的生物油,为萃取分离提供便利。最后,建议尝试一些新的萃取分离方法,如微波萃取和超声波萃取等,考察对生物油萃取分离的有效性。
    • 生物质气化技术及焦油裂解催化剂的研究进展 

      王夺; 刘运权 (2012)
      本文综述了国内外研究机构在生物质气化技术方面的研究进展,主要是对不同于传统气化炉结构的优化设计和对焦油催化裂解所用的催化剂的研究进行了评述,最后指出了进一步的研究与发展方向:如生物质气化反应器的模拟;焦油催化裂解反应机理的研究和动力学模型的建立。
    • 厦门大学能源研究院太阳能光电建筑一体化应用示范项目 

      张风燕 (2012)
      <正>厦门大学能源研究院太阳能光电建筑一体化工程位于厦门市厦门大学翔安新校区东区。厦门大学翔安校区位于厦门市翔安区东南沿海区域。校园南幽翔安南路,北靠香山省风景名胜区的鹊鸟髻,西为现状茂林村,
    • 磷钨酸盐催化转化葡萄糖合成乙酰丙酸 

      曾珊珊; 林鹿; 刘娣; 彭林才 (2012)
      制备了一系列金属离子修饰的磷钨酸盐(MXH3-2 XPW12O40,M=zn,Cu,CS,Ag)催化剂,并将磷钨酸银盐(Ag3PW12O40)用于水解葡萄糖制备乙酰丙酸的实验中。采用fTIr、Xrd、SEM和EPMA等技术对磷钨酸盐性能进行了表征,并分析了磷钨酸银盐催化剂在反应前后结构和表面元素相对含量的变化。考察了反应温度、反应时间、催化剂用量和葡萄糖浓度等对乙酰丙酸得率的影响。结果表明:合成的磷钨酸盐具有磷钨酸的kEggIn结构,并 ...
    • 固体酸SO_4--(2-)/TiO_2-ZrO_2催化制备乙酰丙酸的研究 

      曾珊珊; 林鹿; 刘娣 (2012)
      以蔗糖为原料,固体SO42-/TIO2-zrO2为催化剂,以水为溶剂制备乙酰丙酸。研究了浸渍用硫酸浓度和催化剂焙烧温度对催化剂活性的影响,并探讨了不同反应条件及催化剂重复使用次数对乙酰丙酸得率的影响。用Xrd和nH3-TPd对使用前后的催化剂的结构和酸性进行了表征。实验结果表明,1.0 MOl/l硫酸浓度浸渍,550℃焙烧3 H的催化剂活性较强。在催化剂投加量为1.0 g,反应温度为190℃的条件下反应1 H,乙酰丙酸摩尔得率高达50. ...
    • 离子液体介导制备5-羟甲基糠醛 

      胡磊; 孙勇; 林鹿 (2012)
      5-羟甲基糠醛(5-HMf)被认为是一种非常重要的平台化合物。利用离子液体介导制备5-HMf的研究已经引起了人们越来越广泛的重视,并取得了较为理想的研究成果。本文对离子液体介导制备5-HMf的研究成果进行了系统的归纳和总结,着重介绍了离子液体作为反应溶剂和催化剂在5-HMf制备过程中的应用以及离子液体介导制备5-HMf的形成机理和影响因素,并对离子液体介导制备5-HMf的研究前景进行了展望,以期为5-HMf的进一步研究提供思路和参考。
    • 甘蔗渣活性氧固体碱蒸煮的脱木素动力学 

      谢土均; 林鹿; 庞春生; 杨秋林; 施建斌 (2012)
      探讨了甘蔗渣活性氧固体碱蒸煮的脱木素过程及脱木素动力学。通过建立合适的动力学模型,求出相关的动力学参数。研究结果表明,升温阶段的50~140℃为初始脱木素阶段,140~170℃为大量脱木素阶段。在高温条件下进行保温时,80 MIn内木素脱除较快,保温时间超过80 MIn后,木素脱除不明显。氧脱木素对脱木素反应的级数为1.30,H2O2用量对脱木素反应的级数为0.044,氧压对脱木素反应的级数为0.32,反应活化能为98.57 ...
    • NaCS-PDMDAAC immobilized autotrophic cultivation of Chlorella sp for wastewater nitrogen and phosphate removal 

      Zeng, Xianhai; Danquah, Michael K.; Zheng, Chao; Potumarthi, Ravichandra; Chen, Xiao Don; Lu, Yinghua; 曾宪海; 陈晓东; 卢英华 (Elsevier, 2012 April)
      The unicellular green microalgae, Chlorella sp., entrapped in sodium cellulose sulphate/poly-dimethyl-diallyl-ammonium chloride (NaCS-PDMDAAC) to create microalgae capsules were used to remove total nitrogen (T-N) and ...
    • Catalytic conversion of glucose to levulinic acid by solid heteropolyacid salts 

      Zeng, Shanshan; Lin, Lu; Liu, Di; Peng, Lincai; 林鹿 (Chemical Industry Press, 2012 Decem)
      A series of metal-modified heteropolyacid salt catalysts (MXH3-2XPW12O40, M=Zn, Cu, Cs, Ag) were prepared, and the solid heteropolyacid salt Ag3W12O40 was used in hydrolysis of glucose to produce levulinic acid. The surface ...
    • Structural, electrical and magnetic measurements on oxide layers grown on 316L exposed to liquid lead-bismuth eutectic 

      Hosemann, Peter; Hofer, Christian; Hlawacek, Gregor; Li, Ning; Maloy, Stuart A.; Teichert, Christian; 李宁 (Elsevier, 2012 Febru)
      Fast reactors and spallation neutron sources may use lead-bismuth eutectic (LBE) as a coolant. Its physical, chemical, and irradiation properties make it a safe coolant compared to Na cooled designs. However, LBE is a ...
    • Efficient conversion of glucose into 5-hydroxymethylfurfural by chromium(III) chloride in inexpensive ionic liquid 

      Hu, Lei; Sun, Yong; Lin, Lu; 孙勇; 林鹿 (American Chemical Society, 2012 Janua)
      An efficient process was developed for the conversion of glucose into 5-hydroxymethylfurfural (HMF) in the relatively low-toxicity and inexpensive catalytic system of chromium(III) chloride (CrCl3.6H2O) catalyst and ...
    • Catalytic conversion of biomass-derived carbohydrates into fuels and chemicals via furanic aldehydes 

      Hu, Lei; Zhao, Geng; Hao, Weiwei; Tang, Xing; Sun, Yong; Lin, Lu; Liu, Shijie; 孙勇; 林鹿 (Royal Society of Chemistry, 2012 Novem)
      In recent years, substantial interest has been devoted to the conversion of biomass-derived carbohydrates into furanic aldehydes such as furfural, 5-hydroxymethylfurfural (HMF) and 5-halomethylfurfural, because these ...
    • The effect of calcium oxide addition on the removal of metal impurities from metallurgical-grade silicon by acid leaching 

      He, Falin; Zheng, Songsheng; Chen, Chao; 郑淞生; 陈朝 (Springer Boston, 2012 Octob)
      The removal of metal impurities from metallurgical grade silicon (MG-Si) by acid leaching has been investigated with the addition of CaO. Prior to adding CaO, Fe is the main impurity in the MG-Si sample, and the 2nd-phase ...
    • The structural changes of the bagasse hemicelluloses during the cooking process involving active oxygen and solid alkali 

      Shi, Jian-Bin; Yang, Qiu-Lin; Lin, Lu; Zhuang, Jun-Ping; Pang, Chun-Sheng; Xie, Tu-Jun; Liu, Ying; 林鹿 (Elsevier Ltd, 2012 Octob)
      This work describes the structural changes of bagasse hemicelluloses during the cooking process involving active oxygen (O2 and H 2O2) and solid alkali (MgO). The hemicelluloses obtained from the bagasse raw material, pulp, ...
    • Effects of Zr/Ti molar ratio in SO2-4/ZrO 2-TiO2 calcined at different temperatures on its surface properties and glucose reactivity in near-critical methanol 

      Peng, Lincai; Zhuang, Junping; Lin, Lu; 林鹿 (Elsevier, 2012, 三月)
      Effects of Zr/Ti molar ratio in SO2-4/ZrO 2-TiO2 solid acid catalyst calcined at different temperatures on its surface properties and catalytic activity were thoroughly investigated in this paper. The physicochemical ...
    • Changes of the surface structure of corn stalk in the cooking process with active oxygen and MgO-based solid alkali as a pretreatment of its biomass conversion 

      Pang, Chunsheng; Xie, Tujun; Lin, Lu; Zhuang, Junping; Liu, Ying; Shi, Jianbin; Yang, Qiulin; 林鹿 (BIORESOURCE TECHNOL, 2012-01)
      This study presents a novel, efficient and environmentally friendly process for the cooking of corn stalk that uses active oxygen (O(2) and H(2)O(2)) and a recoverable solid alkali (MgO). The structural changes on the ...
    • Generation of Methyl Vinyl Ketone from Oxidation of Levulinic Acid Oxidized by Cupric Oxide Complex 

      Gong Yan; Lin Lu; Zhang Beixiao; 林鹿 (CHINESE J CHEM, 2012-02)
      Methyl vinyl ketone (MVK) is a kind of high-value chemical which has been widely used in many fields. In this paper, it is formed from oxidation of levulinic acida hydrolysis product of biomass. Copper oxide supported on ...
    • Effects of Zr/Ti molar ratio in SO42-/ZrO2-TiO2 calcined at different temperatures on its surface properties and glucose reactivity in near-critical methanol 

      Peng, Lincai; Zhuang, Junping; Lin, Lu; 林鹿 (J NAT GAS CHEM, 2012-03)
      Effects of Zr/Ti molar ratio in SO42-/ZrO2-TiO2 solid acid catalyst calcined at different temperatures on its surface properties and catalytic activity were thoroughly investigated in this paper. The physicochemical ...
    • Pneumatic transport of granular materials with electrostatic effects 

      Lim, Eldin Wee Chuan; Yao, Jun; 姚军; Zhao, Yanlin (WILEY-BLACKWELL, 2012-04)
      The methodology of coupling large eddy simulation (LES) with the discrete element method was applied for computational studies of pneumatic transport of granular materials through vertical and horizontal pipes in the ...