喝茅台,可护肝,大家不信,没错, 少量葡萄酒有利于心脏, 多数人信,也没错. 但加州大学洛杉矶分校的生化学家最近发现微量酒精可延长线虫生命二倍,你信不信? 你也许难以置信, 但这是事实,目前连发现这一现象的科学家还不知道如何解释. 美国洛杉矶分校的生化学家克拉克领导的研究小组发现,微量酒精可成倍延长线虫生命. 科学家们最初是想看给线虫喂胆固醇,是否延长线虫生命,得到的结果是肯定的.科学家用的是稀释1000倍的酒精作为溶剂,后来发现能延长线虫生命的是溶剂-微量酒精而不是胆固醇.稀释2000倍不能达到同样结果.究竟浓度过高,对线虫有害.线虫通常生命周期为15天,即使不喂食任何东西,也能存活12-14天.微量酒精能延长线虫生命,这一奇特现象,目前还不知道是什么原因和机制. 鉴于蠕虫与人类有大约一半基因是相同的，如果研究人员可以确定延长线虫寿命的相关基因，理论上讲讲,也同样适用于人类衰老研究。 原文 Tiny amounts of alcohol dramatically extend a worm's life, but why? http://newsroom.ucla.edu/portal/ucla/tiny-amounts-of-ethanol-dramatically-221986.aspx By Stuart Wolpert January 19, 2012 Category: Research
2011年10月19日英国皇家化学会在北京文津酒店举行了答谢中国化学家晚会。现场图集供大家欣赏。 Picture one Picture two Picture three Picture four Picture five Picture six Picture seven Picture eight
程序升温还原（TPR）最早的文献 Thermoanalytical techniques are among the most important and widely used methods for the characterization of solid materials. Temperature-programmed reduction (TPR) is a convenient technique for characterizing supported metal oxide catalysts. Generally, TPR is used to provide information on the influence of support materials, preparation and pretreatment procedures, and metal additives on catalyst reducibility. The directly observable quantities include the total consumption of reducing agent and the temperatures of the reduction rate maxima. Qualitatively the character of the TPR pattern contains information on the nature of the reduction process. Robertson et al.,1in 1975, first described the presently used TPR technique. The technique is intrinsically quantitative and also produces kinetic information on the processes involved in reduction. The TPR technique with its kinetic aspects has been described and reviewed thoroughly.2-6 In 1982 Hurst et al.2 reviewed the thermodynamics, kinetics, and mechanisms of reduction with illustrative examples taken from the TPR of many supported and unsupported oxides. Numerous attempts have been made to extract quantitative kinetic information from TPR data, but the kinetic modeling of TPR patterns has received relatively little attention. (1) Robertson, S. D.; McNicol, B. D.; de Baas, J. H.; Kloet, S. C.; Jenkins, J. W. J. Catal. 1975 , 37 , 424. , (2) Hurst, N. W.; Gentry, S. J.; Jones, A.; McNicol, B. D. Catal. Rev . Sc i. Eng. 1982 , 24 , 33. (3) Jones, A.; McNicol, B. D. Temperature-programmed reduction for solid materials characterization ; Marcel Dekker: New York, 1986; p 199. (4) Knözinger, H. Temperature-programmed reduction. Handbook of Heterogeneous Catalysis ; Ertl, G., Knözinger, H., Weitkamp, J., Eds.; VCH Verlagsgesellschaft mbH: Weinheim, 1997; Part 2, p 676. (5) Monti, D. A. M.; Baiker, A. J. Catal. 1983 , 83 , 323. , (6) Malet, P.; Caballero, A. J. Chem. Soc., Faraday Trans. 1988 , 84 , 2369. , 另外一种说法 Determination of reducibility and identification of alloying in copper-nickel-on-silica catalysts by temperature-programmed reduction. Journal of Catalysis (1975), 37(3), 424-31 CODEN: JCTLA5; ISSN: 0021-9517; English abbr_3d9e8032f704a6debe506e17f271cdc9.pdf (562.56 KB) Reduction studies on supported metal oxide catalysts Vernon C. F. Holm and Alfred Clark Journal of Catalysis ，Volume 11, Issue 4, August 1968,Pages 305-316 Reduction studies on supported metal oxide catalysts.pdf (872.72 KB)
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