幼年牦牛松果体的光镜和电镜观察

利用光镜和电镜技术对幼年牦牛松果体的组织形态结构特征进行了研究。结果表明,光镜下,幼年牦牛松果体由松果体细胞、少量的神经胶质细胞、毛细血管和神经等组成。电镜下,松果体细胞的电子致密度低,细胞质内含有丰富的线粒体、粗面内质网、滑面内质网、高尔基复合体、微管、微丝和核糖体,典型异质细胞器突触带呈球形,多位于质膜附近。神经胶质细胞内的线粒体丰富,胞体突起呈球形膨大伸入到松果体细胞之间。松果体细胞以及神经胶质细胞间均存在突触和连接复合体。牦牛松果体内的毛细血管为连续型,远腹侧血管周围可见色素细胞。     

钢结构交错桁架的应用及抗火性能研究简述

钢结构交错桁架体系是一种经济、实用、高效的建筑结构体系,本文对交错桁架的结构特点及其在国内外的应用进行了介绍,对钢结构交错桁架体系在火灾作用下的力学特性进行了初步地探讨,提出了一些钢结构交错桁架体系抗火设计方面有用的建议。     

调整农业产业结构 发展农业环保产业

农业是国民经济的基础,农业问题是我国国民经济发展的瓶颈性问题,调整农业产业结构,发展农业产业,特别是发展环保型、生态型农业产业则是促进国民经济健康发展的一项基础性工作,也是实现经济可持续发展的一项探索性工作.本文重点探讨了发展特色环保农业的特征和发展趋势,探讨了发展环保农业的途径和政府的政策措施.     

俄罗斯产业结构调整现状及前景分析

经济转轨以来，俄产业结构虽有一定的调整，但总体而言并未得到实质性突破。这种产业结构状态在保障俄经济正常运行的同时，也对其未来经济增长形成严重制约。如何加快产业调整与升级，是俄在市场经济体制框架内谋求经济进一步发展的主要问题。     

Age and family structures among the Jews of Mitau, Kurland, 1833–1834

The article analyzes an 1834 listing of the Jewish inhabitants in the city of Mitau in the province of Kurland, one of the Baltic provinces (the other two were Estland and Livland) of the Russian Empire. From Catherine the Great's reign onward, the Jewish population of the Baltic provinces rose steadily throughout the 19th century, but microstudies of Jewish communities in the region are virtually nonexistent, especially for the first half of the century. The Mitau list shows that the Jewish population there was very young, with about 45% being in the age group 0–14. Age at first marriage for males was about 24 years, and for females 21. From about age 35, 93% of males and 97% of females were married. The mean size of the family group was 5.8 persons, and about a third of all families were either extended (containing unmarried relatives beyond the nuclear family) or multiple (more than one kin-linked conjugal family unit). Judging by kinship terms in the source, the kin system tilted toward patrilineality, as would be expected. These characteristics need to be compared to other Jewish communities before and after 1834—in the Baltic area and surrounding regions—but the paucity of local studies suggests that some time will pass before the Mitau findings can be placed in an adequate comparative framework.     

Parent-adolescent congruence on decision-making and its relation to adolescent adjustment

Much attention has been paid to the nature of parent-adolescent relationships, with a frequent conclusion being that it is a time of marked disagreement between parents and their adolescents. However, other literature suggests that this time is not inherently conflictual. The purpose of this study was to examine agreement and disagreement between mothers, fathers, and adolescents on specific issues. Then, adolescent adjustment was assessed, and the degree to which it was a function of congruence with parents was examined. A modified version of the Issues Checklist was used to measure intrafamily agreement; the Revised Behavior Problem Checklist and the Harter Scale of Child's Actual Competence were completed by adolescents' social studies teachers to assess adolescent functioning. Relative to their parents, adolescents reported that they should make more decisions alone, while both mothers and fathers reported that decisions should be made jointly among all family members. Only father-adolescent congruence was found consistently to be related to adolescent functioning. Possible explanations for the present results and relevant issues pertaining to family agreement are discussed.     

Age Adjustment and Recall Bias in the Analysis of Domestic Violence Data: Methodological Improvements Through the Application of Survival Analysis Methods

This methodological paper presents the utility of survival analysis methods to provide age adjustment in the analysis of domestic violence data. These methods improve the estimation of lifetime probability of domestic violence, improve identification of patterns of first victimization over the lifespan, and provide methods of testing risk factors for first victimization while adjusting for the respondents' age. Most importantly, these methods allow a new investigation of recall bias. Results suggest that lifetime probability of abuse may have been substantially underestimated in previous studies because of problems in recall/disclosure encountered by middle-aged women.     

企业集团的多重利益冲突及其治理

企业集团作为一种企业合作组织形式，一方面因其制度优势而在世界经济中的地位日益重要，另一方面因其复杂结构所带来的诸多治理问题又制约了其良性发展。与单个企业相比，企业集团的组织结构复杂多变，治理问题也具有多重性。交叉持股型企业集团中应注意大股东之间的协调问题；纯粹控股型企业集团中注意要加强母公司对子公司的有效监控；而母子关系型企业集团中的治理问题最为复杂，应在母子公司之间建立一个良好的集权和分权机制，防止母公司对中小股东和债权人的利益侵害。     

关于提高公安经济侦查队伍业务素质能力思考

本文从理论和实践相结合的角度深刻阐述了公安经济侦查队伍正规化建设特别是业务素质能力提高的重要性,并对其提高的路径做了有益的探索。     

中国经济结构演进的动因探讨

推动中国经济结构不断演进的主要动力来自三个方面:政府主导的渐进式制度变迁;以技术创新、技术引进和技术扩散为主要内容的技术进步,以及深刻变革的国内国际分工体系。因此,中国经济结构半个多世纪以来一直处于不断调整的非均衡状态。