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Donald M. Kirschenbaum 《Applied biochemistry and biotechnology》1984,9(2):187-206
The molar absorptivity and A
1cm
1%
values for 150 proteins are reported. The conditions under which these values were obtained and citations to the sources
of the data are also provided. 相似文献
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AbstractIn strongly alkaline media ([OH?]?≥?0.12 M), nicotinamide (nica) forms a complex with square-planar Ag(OH)4? [nica]?≥?0.05 M. The complex decomposes in seconds to nicotinamide N-oxide. The correlation of maximum absorbance of the complex with concentrations of nicotinamide and hydroxide requires that the complex is either the five-coordinate Ag(OH)4(H-1nica)2? or the six-coordinate Ag(OH)5(nica)2?. Comparison with the reactions of Ag(OH)4? with nicotinate ion (nic?) and acetamide under similar conditions indicates that nicotinamide coordinates with Ag(OH)4? by the amido group rather than the nitrogen on the pyridine ring or the amido oxygen. Kinetics of the Ag(III)-nica redox reaction are consistent with direct reaction between nicotinamide and uncoordinated Ag(OH4)?. Oxidation takes place at the pyridine ring, yielding nicotinamide N-oxide. Silver(III) is reduced to monovalent silver. 相似文献
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M. S. Jovanović J. Brborić S. Vladimirov B. Zmbova LJ. Vuksanović D. Živanov-Stakić V. Obradović 《Journal of Radioanalytical and Nuclear Chemistry》1999,240(1):321-324
A new diiodine substituted IDA derivative, 2,4-diiodine-6-methyl IDA (DIIODIDA) was synthesized and labeled with99mTc. It was established that99mTc-DIIODIDA had high radiochemical purity. Biodistribution and influence of bilirubin on99mTc-DIIODIDA biokinetics has been studied in rats and compared to the corresponding results for99mTc-SOLCOIODIDA. Related to99mTc-SOLCOIODIDA,99mTc-DIIODIDA has much better biliary exretion (55.18 versus 43.63%). No change of99mTc-DIIODIDA biokinetics, under influence of bilirubin was noticed. Biliary excretion of99mTc-SOLCOIODIDA has been reduced for about 60%. The protein binding of99mTc-DIIODIDA and99mTc-SOLCOIODIDA were also determined, using in vitro method of precipitation. These results showed that99mTc-DIIODIDA hepatobiliary imaging agent is superior to the presently used99mTc-monoiodine IDA derivatives. 相似文献
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The tetrahydroxoargentate(III) ion, Ag(OH)4−, is rapidly reduced by thiourea (tu) in accordance with the three term rate law RATE = {k1+(k2+k3[OH−])[tu]}[AgIII] where k1 = 1.08 s−1, k2 = 1.46 x 103 M−1 s−1, and k3 = 2.02 x 103 M−2 s−1. The k1 path occurs via the rate-determining aquation of Ag(OH)4− while the other two paths involve axial attack of thiourea on silver. The higher values of k2 and k3 compared to the ethylenediamine reaction, which obeys the same rate law, is a reflection of the greater nucleophilicity of tu.
Following the redox reaction, solutions become brown in a reaction that obeys pseudo-first-order kinetics. Similar behaviour is observed when tu is replaced by Na2S or thio-acetamide and when AgI reacts with any of these sulphur containing compounds. We attribute this process to the AgI promoted formation of sulphide species which eventually precipitate as Ag2S. 相似文献
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本文获得了有各种相互作用的一般n阶特征量泛函,其耦合系数反映了不同特征量泛函之间的耦合强度.依据定量因果原理,导出了一般n阶特征量泛函的变分原理,获得了一般n阶特征量泛函的Euler-Lagrange方程,它的不同系数可拟合不同的物理现实,如从线性到任意n阶非线性物理系统,使复杂难解的任意n阶非线性物理系统变得具体可解.并获得了该对称变换下不变的m个的守恒量,以及它们之间的关系和统一描述.依据定量因果原理导出了相对性原理,证明了绝对加速参考系、牵连参考系和相对参考系的力都有来自加速度和质量变化的贡献.利用定量因果原理自然导出了广义牛顿第一定律和广义牛顿第二定律,而且还导出了一个新定律,即广义牛顿第三定律,亦即平移不变性系统合力为零定理.进而将研究结论应用于对银河系的修正引力势、分子势、夸克禁闭势等,且其结果与物理实验一致. 相似文献
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Donald M. Kirschenbaum 《Applied biochemistry and biotechnology》1983,8(4):315-368
The amino acid analyses of 213 proteins, as residues per 1000 residues, are given. In addition, the carbohydrate content, the content of any noncommon amino acids, the sources of all proteins, and the necessary literature citations are given. 相似文献
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A table of molar absorptivity and A1cm1% values for about 200 proteins and protein derivatives is given. The conditions used to obtain these values, the sources of the proteins, and references to the original literature are also given. 相似文献