齐奥尔科夫斯基与全球学

俄罗斯自然科学家齐奥尔科夫斯基是宇航学的奠基人,他通过宇航学影响了我们每个人的生活。他的宇宙哲学内涵丰富,既包含了宗教、哲学内容,同时又为人类指出一条通往＂完善、美好未来＂之路——飞向宇宙,是关于整个人类未来的庞大计划。通常认为,齐氏在技术文明理想和准则基础上制订的庞大的改造地球、征服宇宙计划,预言了当今时髦的稳定发展的思想。但是,齐氏提出的改造地球计划是极度反生态的,而且试图通过人类的宇宙扩张解决全球问题,目前看来存在很多问题。因此,摆在人类面前的任务是寻找符合后工业时代的理想和价值的、能够解决人类面临的全球危机的途径。     

莫言,对中国当代社会的苦涩批判(英文)

"莫言"的中文意思是"不说话",但实际上他的小说具有比一般讲故事的小说更具有震撼力。他的小说《酒国》以一种多视角的形式展现象征意义上的现实,让读者能够多视角地去解读中国的社会现实。     

A method for determining molybdenum in cadaveric material by using alkylphenylcyclohexylcarboxylic acid]

Alkylphenylcyclohexylcarboxylic acid was found to be an efficient extractant to extract molybdenum from the cadaveric material. Method suggested is simple enough for use and doesn't require considerable amounts of chemical reagents.     

Sudden death due to unsuspected coronary vasculitis.

Coronary artery vasculitis is a well-recognized complication of polyarteritis nodosa and is occasionally seen in other forms of systemic vasculitis. However, involvement of the major epicardial coronary arteries leading to myocardial infarction and death is uncommon. Isolated coronary arteritis is even more rare. We report three cases of sudden death due to myocardial ischemia associated with arteritis of the major coronary arteries. All three decedents were previously healthy young to middle-aged men who had died suddenly after complaints of chest pain and shortness of breath. The autopsy findings and differential diagnoses are presented. Such cases are of particular interest to the medical examiner because of the sudden, unexpected nature of the deaths. An approach to the correct diagnosis is discussed.     

Development and usage of a NIST standard reference material for real time PCR quantitation of human DNA

National Institute of Standards and Technology SRM 2372 human DNA quantitation standard has been produced to support the need for a human-specific DNA quantitation standard in forensic casework and calibration of new quantitative polymerase chain reaction (qPCR) assays. The conventional DNA concentration has been assigned with one of the U.S. National Reference UV/Visible Spectrophotometers, assuming an absorbance of 1.0 at 260 nm equals 50 ng/μL of double stranded DNA. In addition, an interlaboratory study has been conducted, to verify that the SRM 2372 materials perform well in currently used DNA quantitation assays by the forensic DNA community. Each unit of SRM 2372 consists of three well-characterized DNA extracts. Component A is a single-source human male material derived from blood. Component B is a multiple-source human female material derived from blood. Component C was purchased as a purified unsheared genomic human DNA (Sigma-Aldrich Co., St. Louis, MO) obtained as a lyophilized human genomic extract and has both male and female donors. SRM 2372 is intended to enable the comparison of DNA concentration measurements across time and place. Manufacturers can use SRM 2372 to validate the values assigned to their own reference materials. Individual forensic laboratories can use SRM 2372 to validate DNA quantitation methods and to verify the assigned concentration of in-house or commercial DNA calibration standards.     

The role of certain sections of the central nervous system in the genesis of sudden death]

Hypothalamic and hippocampal lipid composition in sudden death from coronary heart disease is studied. Thin-layer chromatography was the main method of biochemical analysis. Disorders in the lipid component of hippocampal cytostructures involved mainly the cholesterol fractions. Metabolic disorders in the hypothalamus involved the phospholipid metabolism. The above-mentioned biochemical changes were paralleled by ultrastructural abnormalities. Analysis of the data demonstrates a probable metabolic basis of a central mechanism of sudden cardiac death.