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41.
Carbon nanotubes used for constructing biosensor was described for the first time. Single-wall carbon nanotubes (SWNTs) functionalized with carboxylic acid groups were used to immobilize glucose oxidase forming a glucose biosensor. The biosensor response can be determined by amperometric method at a low applied potential (0.40V). 相似文献
42.
IDENTIFICATION OF PARTIAL MUTATIONAL SITES IN HUMAN MITOCHONDRIAL DNA IN THE CHINESE AND ITS SIGNIFICANCE 总被引:1,自引:0,他引:1
A simple method for the identification of mutational sites in human mitochondrial DNA (mtDNA) was described. It was based on the human Cambridge sequence as a relative standard sequence and a single base pair substitution in mtDNA as a unique mutational form. The partial mutational sites can be determined using this method which was characterized by combining the restriction mapping with the analysis for the table of human mtDNA potential mutational sites with rapidity and simplicity. In the meanwhile, six mtDNA mutational sites found in Chinese population were identified by means of this method. 相似文献
43.
在甲烷氧化偶联制C2烃的研究中,人们发现碱土金属与稀土金属组成的复合氧化物催化剂具有高的催化活性[1,2].稀土化合物作为有希望的工业催化剂之一,已受到广泛的关注.一般认为,它们含有的氧空位对活化甲烷的有效氧物种有利.Debey等在1%Sr/La2O... 相似文献
44.
1,4二环己基取代六元瓜环与Na(Ⅰ)自组装实体的合成与晶体结构 总被引:1,自引:0,他引:1
A novel complex of a new 1,4-dicyclohexyl cucurbituril(DCYQ[6]) with sodium(Ⅰ) ion was synthesized, and the crystal structure was determined by X-ray diffraction technique. In this self-assembled entity both the cavity interaction of DCYQ[6] included a nitrate anion and the portal interaction of the dipole carbonyls of DCYQ[6] with sodium cations lead to form self assembled molecular capsules. The crystal structure of the entity shows a packing of the self assembled molecular capsules connected by hydrogen bonds of water molecules. CCDC: 271400. 相似文献
45.
[Ce(NO3)5H2O]·(C3H5N2)2的合成、晶体结构及热分析 总被引:2,自引:0,他引:2
Colorless crystal, [Ce(NO3)5H2O]·(C3N2H5)2, has been obtained from the reaction of Ce(NO3)3 with imdazole in the aqueous solution and its crystal structure has been determined by single crystal X-ray diffraction techniques.The crystal belongs to triclinic, space group P1. The cell parameters are: a = 0.7489(1) um, b = 0.7914(2) nm, c = 1.8139(3) nm, a = 89.39(2)°, β = 89.37(l) °,γ = 63.18(2)°, Dc = 2.1g·cm-3, Z = 2, R = 0.0319.In the compound, all of five nitrates are bidentate and one molecule of water is monodentate, the coordination number of Ce (Ⅲ) is 11.The processes of thermal decomposition of the compound was proposed by its TGcurve. 相似文献
46.
ZHAO Chunxia XU Guowang SHI Xianzhe MA Jianmei ZHANG Yan L?Shen & YANG Qing . Dalian Institute of Chemical Physics Chinese Academy of Sciences Dalian China . Cell Laboratory Second Affiliated Hospital Dalian Medical University Dalian China 《中国科学B辑(英文版)》2004,47(2):166-172
With the accomplishment of Human Genome Project (HGP), single nucleotide polymorphism (SNP) and mutation detection in human genome are becom-ing a new researching focus. These researches can help us to understand the phenotype diversity of indi-vidual, disease susceptibility and drug resistance of different colonies. Traditional method used for muta-tion detection is slab gel electrophoresis, which re-mains labor-intensive and time-consuming because of the requirement of radioactivity or te… 相似文献
47.
48.
Acylthiourea derivatives are useful as pesticides, herbicides, fungicides and regulator for plant growth, and also as important intermediates in the organic synthesis. In recent years, phase transfer catalysis reaction technique has been widely recognized as an efficient synthetic tool and attracted much attention. In view of these observations, a series of 5-aryl-2-furoyl thioureas containing substituted pyrimidine ring were synthesized using PEG-400 as solid-liquid phase transfer catalyst under ultrasonic irradiation. All of the new compounds have been exactly determined by IR, 1H NMRand elemental analysis. 相似文献
49.
Chelsea N. Widener Alexandria N. Bone Mykhaylo Ozerov Rachael Richardson 路正光 Komalavalli Thirunavukkuarasu Dmitry Smirnov 陈学太 薛子陵 《无机化学学报》2020,36(6):1149-1156
最近Ruamps和同事发现三角双锥构型的Ni(Ⅱ)配合物[Ni(Me6tren)Cl]ClO4(1,Me6tren=tris(2-(dimethylamino)ethyl)amine)具有大的单轴磁各向异性(J.Am.Chem.Soc.,2013,135:3017-3026)。他们利用HF-EPR研究获得横向零场分裂(ZFS)参数E=1.56(5)cm-1但未能确定轴向零场分裂参数D。在本工作中,我们利用0~17.5 T和5 K的变磁场远红外光谱(FIRMS)来检测自旋基态S=1中的MS=±1和MS=0态之间的磁跃迁。在FIRMS中直接观察到Zeeman分裂态之间的跃迁,得出轴向ZFS参数D=-110.7(3)cm-1。我们对1的晶体结构进行了Hirshfeld表面分析,揭示了1分子中的阳离子与阴离子之间以及分子之间的相互作用。 相似文献
50.
CuO超细粉体的形貌与红外特性研究 总被引:16,自引:0,他引:16
CuO作为一种多功能精细无机材料,在印染、陶瓷、玻璃及医药等领域的应用已有数十年的历史,作为催化剂的主要活性成分,近年来在氧化、加氢、C1化学合成、NOx还原、CO及碳氢化合物燃烧、精细化工等多种催化反应中也得到了广泛的应用。可以推测,当CuO材料的粒度达到纳米级时,将使它的功能更加独特,应用更为广泛。因此CuO纳米材料的制备方法、聚集状态、与其他组分或载体的作用状况及催化活性等成为当前功能材料发展的研究热点之一犤1~8犦。我们在前文中报道了直接热解Cu2(OH)2CO3所得CuO粒径小、分布均匀、比表面积大,… 相似文献