Facile preparation of hierarchically porous carbon using diatomite as both template and catalyst and methylene blue adsorption of carbon products

Hierarchically porous carbons were prepared using a facile preparation method in which diatomite was utilized as both template and catalyst. The porous structures of the carbon products and their formation mechanisms were investigated. The macroporosity and microporosity of the diatomite-templated carbons were derived from replication of diatom shell and structure-reconfiguration of the carbon film, respectively. The macroporosity of carbons was strongly dependent on the original morphology of the diatomite template. The macroporous structure composed of carbon plates connected by the pillar- and tube-like macropores resulted from the replication of the central and edge pores of the diatom shells with disk-shaped morphology, respectively. And another macroporous carbon tubes were also replicated from canoe-shaped diatom shells. The acidity of diatomite dramatically affected the porosity of the carbons, more acid sites of diatomite template resulted in higher surface area and pore volume of the carbon products. The diatomite-templated carbons exhibited higher adsorption capacity for methylene blue than the commercial activated carbon (CAC), although the specific surface area was much smaller than that of CAC, due to the hierarchical porosity of diatomite-templated carbons. And the carbons were readily reclaimed and regenerated.     

单分子力谱研究活细胞上多药耐药相关蛋白1的表达

采用原子力显微镜的单分子力谱(SMFM)技术研究了多药耐药相关蛋白1(MRP1)与其抗体间的相互作用, 并考察了人舌癌细胞系TCA8113经高剂量平阳霉素(BLM)反复间歇诱导前后细胞表面MRP1的表达差异. 实验结果表明, MRP1与其抗体之间存在特异性相互作用力, 当针尖运动速率为2.5 μm/s时, 作用力大小约为(182±35) pN; 而且药物诱导后MRP1在人舌癌细胞上的表达明显增强. 本工作为了解活细胞水平上MRP1的表达提供了新方法, 有助于肿瘤细胞多药耐药性(MDR)的研究.     

低温等离子体与MnO_x/γ-Al_2O_3协同催化降解正己醛

研究了在低温等离子体和催化剂共同作用下低浓度正己醛的降解反应.结果表明,等离子体与γ-Al2O3之间产生了很好的催化协同作用,在低放电功率(2.8W)和低温(80℃)下,干燥空气气氛中,γ-Al2O3对0.12%正己醛的去除率为87.1%;当γ-Al2O3负载7.5%MnOx后,正己醛去除率达到96.5%,其效果与Pt/γ-Al2O3相当.7.5%MnOx/γ-Al2O3在实验条件下连续使用50h,其催化活性未见下降.     

Enantioselective Total Synthesis of Four Styrylpyrone Derivatives

The first enantioselective total synthesis of 5-acetoxygoniothalamin 1 and 5-acetoxyisogoniothalamin oxide 2 was achieved through the Sharpless kinetic resolution of recemic secondary 2-furylmethanol 5 and the Mitsunobu reaction. At the same time we developed a short synthetic route for 6R-( )-goniothalamin 3 and (6R,7R,8R)-( )-goniothalamin oxide 4. And according to this route the configuration of 5-acetoxygoniothalamin 1 was confirmed as (5S,6S).     

可逆加成-断裂链转移活性自由基聚合

介绍了可逆加成-断裂链转移(Reversible addition-fragmentation chain tansfer,RAFT)活性自由基聚合的反应机理、聚合动力学和特点，对RAFT试剂的选择和制备作了简要介绍，并综述了RAFT聚合的发展动态及应用状况。     

新颖无限三股螺旋钴配位聚合物{[Co(4,4''''-bipyridine)(4,4''''azobispyridine)_2(NCS)_2]·H_2O}_n的合成、结构和性质的研究(英文)

0IntroductionThereisagreatcurrentinterestforthecrystalengineeringofcoordinationframeworks犤1,2犦,notonlybecauseoftheirpotentialapplicationsaszeolite-likematerialsinmolecularselection,ionexchange,andcatalysis,butalsobecauseoftheirintriguingvarietyofarchitecturesandnewtopologies.Uptonow,themostimportantdrivingforcesincrystalengineeringarecoordinationbondingandhydrogenbondinginteract-ion犤3～5犦.Theuniquedirectionality,strength,andcom-plementaryofnon-covalenthydrogenandcoordinatedbondingplayanimp…     

复合材料树脂传递模塑工艺及适用树脂

简要介绍树脂模型工艺（RTM）的基本原理,优点及适用树脂的特性;对适用于RTM工艺的先进基体树脂进行综述,并介绍了国内外的商业开发情况。     

V2O5-Ag2O/η-Al2O3催化剂上甲苯氧化制苯甲醛的研究

制备了一系列负载型V—Ag—Al—O催化剂并用于甲苯的气相选择氧化制苯甲醛反应，考察了催化剂组成对反应性能的影响．研究发现，V205负载量为12．5％、Ag2O负载量为7．5％并经773K活化的4号催化剂，在空速467．6h-1，温度663K时反应，得到了甲苯转化率49．58％、苯甲醛选择性29．22％的较好结果．用XRD、XPS、SEM等测试手段，对催化剂进行了结构表征．     

铜的催化褪色动力学-负吸光度法测定

以催化褪色动力学光度法测铜为例 ,对负吸光度法用于褪色法能提高准确度与灵敏度、扩展线性范围、减小共存离子干扰及操作简便规范等的原因进行了系统的研究 ;实例表明 ,间接摩尔吸光系数为1.71×107L·moL -1·cm -1,可测浓度范围为40～3600ng·L -1及相对标准偏差为0.8%(n=9) ,均明显优于用经典吸光度法测定 ,且催化温度降低 ,反应时间缩短并省去反应抑制剂 ,较原方法易于操作