Cryptomelane（KxMn8-xO16）： Natural active octahedral molecular sieve（OMS-2）

The Xiangtan manganese deposit (XTM) used to be considered a supergene oxide manganese ore in South China. We reported a new identification of the naturally outcropping cryptomelane by examining the physical, chemical and structural features of the XTM supergene oxide manganese ore. The MnO2 content was over 90%, K2O more than 3%, and water from 2.2%-3.1% which is similar to one in zeolite. The cell parameters of the cryptomelane were given as a0 = 0.9974 nm, b0 = 0.2863 nm, c0 = 0.9693 nm and β= 91.47°. There was a larger pseduotetragonal tunnel in the natural cryptomelane that was formed by [MnO6] octahedral double chains with aperture of 0.462×0.466 nm2, filled with K cations resulting in some Mn3+ substituting for Mn4+ to balance the negative charges of structure. The finding is important not only for prospecting manganese resources in South China, but also in application of octahedral molecular sieve of natural cryptomelane as that developed in the tetragonal molecular sieve of natural zeolite o     

铂(II)与胺类配合物的合成、晶体结构和抗肿瘤活性研究

研究铂(II)与三种胺类配合物的合成、晶体结构和体外抗肿瘤活性,化合物1的X-射线单晶结构分析表明:这是一个很少见的具有四方锥几何构型的铂(II)配合物,顺式平面四方形配位的铂的轴向上有第5个配位原子。其抗肿瘤活性实验显示3个配合物对几种研究的癌细胞都有较强的抑制作用。     

Carbon Nanometer Tube Threads

Jiang Kaili, a doctorate student of Tsinghua University, and his colleagues have recently landed a major progress on developing carbon nanometer tube components by successfully pulling out carbon nanometer tube threads from carbon nanometer tubes. The finding was published in Nature on October 24, 2002.     

Pt／C电催化剂碳载体热处理条件和性能研究

采用浸溃还原法，优化碳载体热处理条件，制备出具有高分散性、平均粒径为3．3nm的Pt／C电催化剂．通过TEM、XRD方法对催化剂进行结构表征；利用Pt／C薄膜电极结合CV法评价了电催化剂的性能，测试结果表明，采用Vulcan XC-72碳黑，在600℃下、氮气(或氩气)中进行热处理，所制得的Pt／C电催化剂对氧还原反应具有良好的电催化活性。     

发光二极管胜过液晶显示器

有机发光二极管(OLED)显示器技术已经发展到能够显示1600万种颜色的程度。柯达的专利技术表明，由eMagine公司开发的全色快速矩阵电路含有超过150万个独立的可寻址的图像元素。为了达到看得“逼真”的目的，显示器必须有一个较宽的颜色和色调     

光合细菌处理垃圾渗滤液静态试验研究

利用光合细菌(Photosynthetic bacteria PSB)混合培养物对垃圾填埋场渗滤液进行了静态试验，CODcr和BOD5去除率分别达到84．4％，和79．7％，硫化物和NH3-N去除率为97．3％和69．2％．处理后的光合细菌液可以综合利用，具有较大的经济效益．     

板蓝根粗提液抑制流感病毒的实验研究

对板蓝根凝聚粗提液的抗流感病毒作用进行了研究。用丙酮脱脂提取板蓝根生药的凝集素，并分别测定各样品的血凝活性，并用45.3mg/mL的样品对流感病毒（A1／京防／97－53H1N1，A1／京防／262／95）进行了体外抑制试验。结果表明：板蓝根凝集素对流感病毒具有显著的直接杀灭作用和预防作用及较好的治疗作用，而且得出抑制流感病毒的效果与板蓝根凝集素血凝活性的高低有关。     

杀虫素48B的发酵、分离及性质初步研究

杀虫素48B是从黑微紫链霉菌浅色变种发酵液菌丝体中分离出来的一种杀虫活性物质，经过对其理化性质的测定及UV，IR，EL-MS，^1H—NMR，^13C-NMR等光谱分析，初步推测为一种长链状不饱和脂类化合物，是一种结构新颖的杀虫抗生素．’     

微生物的筛选

采用筛选试验方法，从含有大量微生物菌群的土壤、活性污泥等试样中筛选出多种具有产絮效果的菌种，其中Y5效果最好。试验表明，当培养基初始PH值为5．5，培养时间为65h时，Y5菌液上清波对土壤悬浊液的絮凝率最好。