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Extraction of penicillin G by aqueous two-phase system of [Bmim]BF4/NaH2.O4

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Science Bulletin 2005年第15期 48-51页

作者： LIU Qingfen1,2.3, HU Xuesheng1,2. WANG Yuhong3, YANG Ping3, XIA Hansong1,2. YU Jiang1 & LIU Huizhou1 1. Laboratory of Separation Science and Engineering, State Key Labora-tory of Biochemical Engineering, Institute of Process Engineering, chinese academy of sciences, beijing 100080,{2. 2. graduate school of the chinese academy of sciences, beijing 100039,{2. 3. North{2. Pharmaceutical Group, Shijiazhuang 050015,{2.

A novel approach for the extraction of penicil-lin G by aqueous two-phase system comprised of hydrophilic ionic liquid [Bmim]BF4 (1-butyl-3- methylimidazolium tetra-fluoroborate) and NaH2.O4 is reported. The effects of some important parameters involving the concentration of NaH2.O4, the concentration of penicillin G, the amount of [Bmim]BF4 on the formation of aqueous two-phase system and the extraction yield of penicillin were investigated. The primary result shows that the ATPS can take advantage of penicillin concentrated in upper phase at higher pH value for penicillin extraction from its aqueous solution without emul-sification.

关键词： ionic liquid phosphate aqueous two-phase penicillin G extraction.

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RDF流化床燃烧过程NO_x生成比较研究

燃料化学学报 2005年第5期33卷 633-636页

作者：赵松李海滨阎常峰赵增立陈勇中国科学院广州能源研究所

NO_x formation behaviors of two kinds of RDF (Refuse Derived Fuel) samples with different N content were studied using a fluidized bed combustor. The results show that RDF samples are easily to be combusted in the fluidized bed reactor and the combustion process is stable without external energy. The distribution of NO_x contents depends on the temperature distribution along the height of the fluidized bed. Under the same operation conditions, the higher nitrogen content in the RDF sample leads to higher NO_x concentration in the flue gas. Both the extra air ratio and the injection of secondary air can affect the NO_x formation characteristics, especially for the RDF with high nitrogen content.

关键词：垃圾衍生燃料流化床 NOx 燃烧

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Ni基双金属催化剂加氢脱氧性能的研究

燃料化学学报 2005年第5期33卷 612-616页

作者：王雪峰王锋陈满英任杰中国科学院山西煤炭化学研究所煤转化国家重点实验室中国科学院研究生院北京100039 暨南大学

考察了Ni-M/γ-Al2.3(M=Co、Cu、Fe、La)双金属催化剂对醇、酸、酮有机含氧化合物(丁醇、丁酸、丁酮)的加氢脱氧性能,并对其中间产物进行了考察。通过TPR、XRD表征手段对Ni基催化剂的还原性能、表面分散度等特性进行了研究。结果表明,N... 详细信息

考察了Ni-M/γ-Al2.3(M=Co、Cu、Fe、La)双金属催化剂对醇、酸、酮有机含氧化合物(丁醇、丁酸、丁酮)的加氢脱氧性能,并对其中间产物进行了考察。通过TPR、XRD表征手段对Ni基催化剂的还原性能、表面分散度等特性进行了研究。结果表明,Ni基催化剂中第二活性组分相对不同有机含氧化合物表现出不同的加氢活性和选择性。对于丁酸,在Ni基催化剂中加入Fe表现出较好的活性;对于丁醇,加入La有较好的加氢脱氧性能;而对于丁酮,加入Cu更有利于提高催化剂的脱除性能。醇和酯是有机酸在Ni/γ-Al2.3催化剂上加氢转化的中间产物。

关键词： Ni/γ-Al2.3 双金属催化剂有机含氧化合物加氢脱氧

C_5烷烃分子在AlPO_4-5分子筛中吸附的分子模拟研究

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燃料化学学报 2004年第5期32卷 569-572页

作者：刘洁翔董梅秦张峰王建国中国科学院山西煤炭化学研究所煤转化国家重点实验室

采用分子水平计算机模拟方法研究了环戊烷、正戊烷和2.甲基丁烷在AlPO4 5分子筛中的吸附,得到了有关吸附平衡常数、吸附热、吸附等温线以及平均势能等。结果表明,在373K,2.甲基丁烷的饱和吸附量高于其他两种异构体;473K,环戊烷的饱和吸... 详细信息

采用分子水平计算机模拟方法研究了环戊烷、正戊烷和2.甲基丁烷在AlPO4 5分子筛中的吸附,得到了有关吸附平衡常数、吸附热、吸附等温线以及平均势能等。结果表明,在373K,2.甲基丁烷的饱和吸附量高于其他两种异构体;473K,环戊烷的饱和吸附量高于其他两种异构体;573K,在所测试的压力范围内,环戊烷的吸附量都高于其他两种异构体,2.甲基丁烷的吸附量高于正戊烷。C5烷烃分子在AlPO4 5中吸附量的不同是由于他们在分子筛中的排列方式不同而引起的。低吸附量时C5烷烃分子平均势能不随吸附量变化;高吸附量时平均势能随着吸附量的增加而降低;而2.甲基丁烷和环戊烷分子的平均势能变化更加明显。

关键词：分子筛 AlPO4—5 C5 吸附分子模拟

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有害赤潮藻对鱼类影响的研究进展

水产学报 2002年第6期26卷 561-568页

作者：谭志军颜天周名江中国科学院海洋研究所中国科学院海洋研究所山东青岛2.6071 中国科学院研究生院北京100039 山东青岛2.6071

This paper presents the effects of harmful algae on fish based on the studies in recent years. The results show that the harmful algae can affect the survival, enzyme, cell, tissue and behavior of fish directly or indirectly, also the phycotoxin can be accumulated in the tissue and organ of fish, and influence the organisms of higher level. At last, we have discussed the elements that affect the toxicity of harmful algae.

关键词：有害赤潮藻藻毒素鱼类影响

Cortactin mediated morphogenic cell movements during zebrafish (Danio rerio) gastrulation

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Science china(Life sciences) 2005年第6期48卷 601-607页

作者： YU Dan1,2. ZHANG Peijun1 & ZHAN Xi3 1. Experimental Marine Biology Lab, Institute of Oceanology, chinese academy of sciences, Qingdao 2.6071, china {2. of the chinese academy of sciences, beijing 100039, china 3. Greenebaum Cancer Center, Department of Cancer Center, University of Maryland school of Medicine, MD 2.855, USA Experimental Marine Biology Lab Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China graduate school of the{2. Beijing 100039 China Experimental Marine Biology Lab Institute of Oceanology Chinese Academy of Sciences Qingdao 266071 China Greenebaum Cancer Center Department of Cancer Center University of Maryland School of Medicine MD 20855 USA

Cell migration is essential to direct embryonic cells to specific sites at which their developmental fates are ultimately determined. However, the mechanism by which cell motility is regulated in embryonic development is largely unknown. Cortactin, a filamentous actin binding protein, is an activator of Arp2.3 complex in the nucleation of actin cytoskeleton at the cell leading edge and acts directly on the machinery of cell motility. To determine whether cortactin and Arp2.3 mediated actin assembly plays a role in the morphogenic cell movements during the early development of zebrafish, we initiated a study of cortactin expression in zebrafish embryos at gastrulating stages when massive cell migrations occur. Western blot analysis using a cortactin specific monoclonal antibody demonstrated that cortactin protein is abundantly present in em-bryos at the most early developmental stages. Immunostaining of whole-mounted embryo showed that cortactin immunoreactivity was associated with the embryonic shield, predominantly at the dorsal side of the embryos during gastrulation. In addition, cortactin was detected in the convergent cells of the epiblast and hypoblast, and later in the central nervous system. Im-munofluorescent staining with cortactin and Arp3 antibodies also revealed that cortactin and Arp2.3 complex colocalized at the periphery and many patches associated with the cell-to-cell junction in motile embryonic cells. Therefore, our data suggest that cortactin and Arp2.3 medi-ated actin polymerization is implicated in the cell movement during gastrulation and perhaps the development of the central neural system as well.

关键词： cortactin, Arp2.3 complex, zebrafish, cell movements, morphogenesis, gastrulation, neurulation.

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亚临界水条件下煤中汞的脱除

燃料化学学报 2004年第5期32卷 513-516页

作者：王宝凤王刚李文陈皓侃李保庆中国科学院山西煤炭化学研究所煤转化国家重点实验室

运用半连续反应装置对山西吴家坪煤中汞在亚临界水中的脱除规律进行了研究。考察了反应温度为2.0℃、32.℃、350℃、380℃,反应压力为5MPa、10MPa、15MPa,萃取时间为10min、30min、60min、100min时对汞脱除率的影响。结果表明,在2.0℃～... 详细信息

运用半连续反应装置对山西吴家坪煤中汞在亚临界水中的脱除规律进行了研究。考察了反应温度为2.0℃、32.℃、350℃、380℃,反应压力为5MPa、10MPa、15MPa,萃取时间为10min、30min、60min、100min时对汞脱除率的影响。结果表明,在2.0℃～380℃,随着温度升高,汞脱除率明显增加;在5MPa～15MPa,压力越大,汞的脱除率也越大;在10min～100min,随着萃取时间的延长,汞脱除率增加;在380℃,15MPa,1h,汞的脱除率最大可达96%以上。

关键词：亚临界水煤汞脱除

制备条件对异丁烯选择性氧化催化剂性能的影响

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燃料化学学报 2004年第4期32卷 481-485页

作者：王蕾张锁江李增喜张香平王玉兰中国科学院过程工程研究所北京100080

通过正交实验设计,改变钼酸铵溶液的质量分数、pH值和催化剂焙烧温度,利用共沉淀法制备了一系列Mo Bi Co Fe Ce Cs K复合氧化物催化剂。借助于BET、TG DSC、XRD等分析方法对催化剂的物理化学性质进行了表征。在常压连续流动固定床反应器... 详细信息

通过正交实验设计,改变钼酸铵溶液的质量分数、pH值和催化剂焙烧温度,利用共沉淀法制备了一系列Mo Bi Co Fe Ce Cs K复合氧化物催化剂。借助于BET、TG DSC、XRD等分析方法对催化剂的物理化学性质进行了表征。在常压连续流动固定床反应器中,系统地考察了上述三种制备条件对复合氧化物催化剂催化异丁烯选择性氧化生成甲基丙烯醛反应性能的影响。结果表明,大比表面积的催化剂具有较高的活性,而平均孔径小的催化剂选择性较差。催化剂的最佳制备条件为:钼酸铵溶液的质量分数10%、pH值2.3、焙烧温度500℃。在异丁烯∶空气=6∶94(体积比)、GHSV=3600h-1和360℃条件下,异丁烯转化率87.2.,甲基丙烯醛选择性72.0%,甲基丙烯醛收率62.7%。

关键词：异丁烯甲基丙烯醛选择性氧化复合氧化物催化剂

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亚临界水脱除煤中硫的实验研究

燃料化学学报 2005年第5期33卷 630-632页

作者：王刚王宝凤李文陈皓侃李保庆中国科学院山西煤炭化学研究所煤转化国家重点实验室

Pre-combustion desulfurization of coal is an important method to control SO2.emission in a coal fired power plant. Desulfurization of Huayinshan coal with sub-critical water in a semi-continuous reactor was studied. The effects of temperature （32.℃450℃）, pressure （5MPa15MPa） and extraction time （10min100min） on the removal of sulfur and weight loss of coal were examined. The results show that with the increase of temperature, pressure and reaction time the weight loss of coal and the removal of total sulfur in coal increase, and with the increase of temperature and reaction time the removal of organic sulfur increases. At higher temperature, sub-critical water has the characteristic of selective desulfurization. The inorganic sulfur removal is mainly a physical process. Below 370℃ the organic sulfur removal is higher than inorganic sulfur removal, but above 370℃ it is opposite. It is suggested that considering the practicability, the suitable high temperature and low pressure should be taken in the sub-critical water operation condition.

关键词：亚临界水煤硫脱除