Timing and history of marine hydrocarbon accumulation in Tarim craton

<正> Based on the analyses of hydrocarbon inclu-sions, K-Ar dating of authigenic illites and oil/gas-watercontact retrospection as well as other methods, the marineprimary reservoirs in the cratonic region of the Tarim Basinare found to have been formed in the late Caledonian toearly Hercynian, late Hercynian, and Himalayan, and oil andgas adjusted and redistributed in the Yanshanian (Jurassic toCretaceous) and Himalayan (Tertiary). The analyses alsoshow that the remaining primary oil accumulations aremostly formed in the late Hercynian, and the secondary oilreservoirs resulted from the adjustment and redistribution ofthe earlier accumulations during the Yanshanian and Hima-layan (especially late Himalayan), of which the Himalayan isalso the major stage of gas accumulation. The primary oilreservoirs formed in the late Hercynian mostly occur withinthe Paleozoic formation, whereas the secondary reservoirsformed in the Himalayan in the Mesozoic. The late adjust-ment and redistribution of reservoirs in the craton region ofthe Tarim Basin is ubiquitous because of the intensified tec-tonic movements since the Mesozoic, especially Cenozoic andintrusion of the high- to over-mature gas. Furthermore, thelower amplitude of reservoirs in the craton region also makesthem easier to be adjusted and redistributed. Therefore, theremaining paleo-uplift and palaeo-slope developed in rela-tively stable tectonic regions are the main potential areas forthe middle-large marine reservoirs in the Tarim Basin.     

沈阳地区淡水硅藻调查

本文结合教学报道了在沈阳地区采集到的淡水硅藻类共计二纲、五目、八科、二十二属、五十六种。     

季风常绿阔叶林短刺栲群落的净第一性生产量研究

本文采用维量分析以估测滇西南季风常绿阔叶林短刺栲群落的净第一性生产量.结果表明,12年生幼龄林具有较高的净生产量,比42年生中龄林高253.1g/m~2·a.幼龄林的净第一性生产量为2259.5g/m~2·a,其中树占31.47％,枝占20.85％,叶占20.42％,根占25.91％,草食动物的叶采食量占1.35％.中龄林的净第一性生产量为2006.4g/m~2·a,其中树干占36.01％,林占21.63％,叶占19.03％,根占21.53％,叶被采食量占1.80％.     

30例原发闭经患者的遗传学分析

对30例原发闭经患者的遗传学分析,认为 X 染色体短臂缺失是导致身高和性腺发育不全的重要原因.并讨论了核型与表型的关系,认为对性腺组织的染色体核型分析有助于病因的探索.     

云南乡镇小学骨干教师心理素质状况调查与思考

通过对云南边疆地区乡镇小学骨干教师心理素质进行测试发现,被试整体心理健康情况比较稳定,但责任感、有恒性、自律性、创新能力、适应能力等几项情况均不容乐观。教师心理素质的优劣,直接影响素质教育的进程,为进一步促进小学教师心理素质的健康发展,教师应从我做起,积极提高自身心理素质,学校应采取有效的管理措施促进教师的心理健康,全社会应共同营造有利于教师心理健康的氛围。     

社会主义发展阶段的理论与实践

通过马克思主义发展阶段理论的分析，我国现阶段的社会主义不能属于“共产主义的第一阶段”，是不够格的社会主义。建设有中国特色社会主义的过程就是由不够格到够格的过程，这个过程相当长，今天我们只处于这个过程的初始阶段。邓小平初级阶段理论及江泽民总书记的《在庆祝中国共产党成立八十周年大会上的讲话》中有关初级阶段长期性、党的最低纲领和最高纲领的系列观点，揭示了这个特殊中间阶段的规律，无疑是对马克思社会主义发展阶段理论的发展。     

高师体育师资培养对策的研究

针对当前中小学体育教育的现状,同一些发达国家教育情况相比较,为适应新世纪中小学体育发展的需要,应加强中小学的体育师资队伍建设.文章探讨了新型体育教师的培养规格和对策,提出了适应未来社会发展的我国中小学体育教育专业培养目标的实现途径.     

伯胺И_(1923)从硫代硫酸钠-亚硫酸钠介质中萃取银的研究

研究了用伯胺N_(1928)从Ha_2S_2O_3-Na_2SO_3介质中萃取银的机理.由于S_2O_3~(2-)易被氧化.因此萃取时不应有氧化性离子如NO_8~-等存在,并且要加入Na_2SO_3作稳定剂.此外,有机相伯胺的硫代硫酸盐也是临用时制备的.萃取的最适合pH在3.5～6.0.萃合物的组成用4种方法测定:即Job氏法,饱和容量法,斜率法与饱和有机相的化学分析.它们都表明萃合物组成为(RNH_3)_5Aga(S_2O_3)_4.用红外光谱研究了被萃阴离子的结构,说明该阴离子为折线状,测得该反应的热力学函数为logKex=27.05.△H°=-49.3J/mol,△G°=-141.3/kJmol与△S°=517.1J/mol·K。     

Snake venom thrombin-like enzymes: from reptilase to now

The snake venom thrombin-like enzymes (SVTLEs) comprise a number of serine proteases functionally and structurally related to thrombin. Until recently, only nine complete sequences of this subgroup of the serine protease family were known. Over the past 5 years, the primary structure of several SVTLEs has been characterized, and now this family includes several members. Of particular interest is their possible use in pathologies such as thrombosis. The aim of the present review is to summarize the state of the art concerning the evolutionary, structural and biological features of the SVTLEs.Received 16 August 2003; received after revision 26 September 2003; accepted 1 October 2003     

高校写作教学内容与中小学写作教学内容的衔接对策

长期以来,高校写作教学内容的设置,不以现有中小学写作教学内容为参照,同中小学写作教学内容多有重复,没有建立起合理的教学结构,使得高校写作教学效益不高。通过对二者之间的重复进行比较、分析,提出高校写作教学同中小学写作教学内容衔接的相应对策。