含盐多元系气液平衡线性关系的理论探讨

本文应用微扰理论计算了由甲醇—乙醇—水—NaCl、LiCl、CaCl_2、NaBr、NaI所构成体系的等压气液平衡。证明了由实验结果发现的当混合溶剂的相对组成固定时,体系的沸点与加入盐量间的线性关系。计算中涉及的LJ参数,我们采用纯物质的蒸气压及密度数据进行拟合。计算结果与实验测定值符合较好。     

匈奴地区的中原人口及汉匈关系

虞常等中原人口在匈奴社会里的实况，诺颜乌拉墓葬中出土的实物皆说明：两汉时期在匈奴地区匈汉人民之间。不存在相互敌对的思想意识。匈奴南下入塞“寇盗”中原边郡是不争的事实，但其目的是为生存而获取经济物资。匈汉争夺只是发生在局部的、暂时的现象，双方关系的主流是和平相处、互通有无。     

关系营销中的渠道建设

关系营销中要求制造商与分销商形成一种以信任和承诺为基础的,以共赢为目标的长期合作的渠道关系。此种关系型渠道在当今市场中为制造商提供一个相对稳定,忠诚,高效的分销队伍,但也有其发展的局限性。本文结合宝洁公司的分销渠道建设来探讨关系型渠道的建设、维护和优化过程中的关系变化问题。     

论出版者在著作权法民事关系中的"被动性"

在著作权民事关系中,作者和出版者之间的关系本是两个平等主体之间的关系。但在著作权司法实践中,法院在处理作者与出版者因出版合同产生的民事纠纷时,总让人感到合同对出版者的约束力大于对作者的约束力,每每让出版者陷入被动而产生不平之感。因此,需要我们探讨这种不平之感产生的原因,从而正确认识出版者在著作权法民事关系中的“被动性”。     

论日本发展与东盟关系的外交策略

日本之所以能与东盟建立起亲密的伙伴关系,是战后日本施展各种外交手段和策略的结果:首先通过战争赔偿和直接投资,打开东南亚市场,缓和与东盟的关系;其次以经济援助为武器,稳定日本经济市场,使东盟成为其提高国际政治影响力的“助选区”;再次随着国际形势的变化,适时调整东盟政策;以文化外交为手段,加强日本与东盟各国的文化与社会联系,使东盟成为其提高国际政治影响的“后院”;日本还积极参加国际政治与安全方面的合作,使东盟成为其谋求政治大国的起点。     

上市公司的契约性质——影响其会计信息质量的内在因素

从制度经济学的角度研究分析了影响上市公司会计信息质量的内在因素,指出解决上市公司会计信息质量的根本途径在于在企业内部建立有效的治理结构。     

MFC-2000-2型厂用电快切装置改造应用与分析

通过对山西柳林电力有限责任公司厂用电切换BZT装置存在问题的分析，提出了MFC-2000-2型厂用电快切装置的改造意义，并对该装置的性能、特点进行了阐述。     

论我国教师教育事业的发展趋势

论述开放性的教师教育在我国教育发展中的历史必然性。指出教师教育要刚性与柔性结合,学科教育与从师教育分立，理论学习与能力训练并举。并提出教师教育要处理好几个关系。从制度设计层面提供了几种趋利避害的方法。     

Oxidative photochemical decarboxylation of zaragozic acid A

A unique decomposition reaction of the novel squalene synthase inhibitors called zaragozic acids has been studied. Under very mild conditions, e.g. by merely exposing their solutions to air and visible light at ambient temperature, these compounds, characterized by the 2,8-dioxabicyclo[3.2.1]octane-4,6,7-trihydroxy-3,4,5-tricarboxylic acid core, rapidly decompose. As relatively stable intermediates in the cascade of decomposition, the biologically active 2,8-dioxabicyclo[3.2.1]octane-6,7-dihydroxy-4-keto-5-caroxylic acid (or 3,4-decarboxy-4-dehydro) derivatives of these compounds have been isolated in ca. 20% yield. Derivatization on the highly reactive 4-carbonyl group yields stable derivatives, several of which are potent inhibitors of squalene synthase. Further decomposition results in the elimination of C3 and C4 atoms and the carboxylic acid on C5, the oxidation of C5 to carboxylic acid and the liberation of the oxo group on C1. Specific results obtained with zaragozic acid A, a key representative of the family of these potent cholesterol-lowering agents, are presented in this study.     

Lake Tanganyika as an evolutionary reservoir of old lineages of East African cichlid fishes: Inferences from allozyme data

Genetic differences between 20 species of cichlid fish, representing all the 12 tribes proposed for the cichlid fish fauna of Lake Tanganyika, were studied by allozyme electrophoresis. Most species were genetically very differentiated from each other. Phylogenetic analysis based on the allozyme data indicated that at least seven old, ancestral lineages have contributed to the present cichlid fauna of the lake. Lake Tanganyika, the oldest of the rift-valley lakes, can be recognized as an evolutionary reservoir of major lineages of cichlids in East Africa.