民国时期四川盐井租佃契约

民国时期,四川盐井经营主要采用租佃经营的方式,本文根据有关盐业档案资料,对当时四川盐井租佃契约的种类、内容和特点进行了分析。     

民国山西警政建设研究

民国山西警政建设经历了四个发展阶段,每一阶段都有其发展特点和重点,并在管理体制、警察教育、乡村警政建设、警察的职能等方面有一定特色,这些都对现代警政建设有重要的借鉴价值。     

民国时期福建海洋航运业的发展

民国建立以后,福建的海外远洋航运虽仍然处于外国势力的控制之下,但是由于强加于民间航运业的封建束缚有所削弱,同时一战期间,西方列强忙于在欧洲争夺,暂时放松了对中国的侵略,为福建近代海洋航运业的发展提供了一个空前有利的环境和条件。民族资本和海外华侨创办远洋轮船航运业顿呈活跃,海外航线不断增多。然而,在帝国主义压迫和国民党政府的腐败统治下,民族海洋航运业是难以得到真正的发展。     

ASSESSING NEIGHBORHOOD AND SOCIAL PSYCHOLOGICAL INFLUENCES ON CHILDHOOD VIOLENCE IN AN AFRICAN‐AMERICAN SAMPLE*

The present study examines the extent to which neighborhood and social psychological influences predict childhood violence among 867 African‐American youth. The results showed that neighborhood affluence was the only neighborhood‐level variable to exert a significant influence on childhood violence. Furthermore, childhood violence was significantly related to social psychological influences, such as adopting a street code, associating with violent peers, parental use of violence, and quality parenting. Overall, the findings suggested that simply living in a violent neighborhood does not produce violent children, but that family, peer, and individual characteristics play a large role in predicting violence in childhood.     

邓小平在中央苏区“第一落”的坎坷与启示

邓小平在江西中央苏区时期,政绩显著,出类拔萃,却又历尽坎坷,大起大落。1933年3月,时任中共会寻安中心县委书记的邓小平,被"左"倾错误推行者打成所谓"毛派"头子和"江西罗明路线"的代表人物,并受到错误的处置。本文依据大量第一手文献资料,揭示了"左"倾错误推行者在中央苏区开展反"罗明路线"斗争的缘由,勾勒了邓小平在中央苏区"第一落"的来龙去脉,总结了这场错误党内斗争的历史教训和邓小平在逆境中奋起的风范与启示。     

发展中心城市是陕西省城市化的最优途径

关于中国城市化发展的道路,学术界有优先发展小城镇和优先发展中心城市两种不同的观点。陕西省应走优先发展中心城市之路。这是因为,陕西省是一个欠发达的省份,中心城市规模太小,中心城市综合实力偏弱。     

新形势下完善《国籍法》的思考

《中华人民共和国国籍法》公布实施至今已二十六年。随着我国对外开放的进一步发展,国际交往日益增多,新的国籍问题也时有出现。由于《国籍法》独立性较强,在司法实践中,一些特殊案例又无法借用其他相应的法律,因此,迫切需要对《国籍法》加以完善和修改,同时还要规范执法。     

非洲猪瘟CD2v胞外区基因片段的真核表达及其多克隆抗体的制备

本研究利用真核表达系统表达非洲猪瘟病毒的CD2v胞外区蛋白,研究其免疫特性,制备多克隆抗体并研究其性质,为研发特异性单抗奠定数据基础。以非洲猪瘟病毒Wuhan2019-1株(GenBank:MN393476.1)为模板,合成CD2v胞外区基因序列,并将其克隆至真核表达载体pCAGGS载体中,获得pCAGGS-CD2v胞外区重组质粒。经酶切和测序鉴定后,将重组质粒转染293F细胞,获得重组胞外CD2v蛋白(简称His-CD2v)。用Ni-NTA柱纯化His-CD2v,并以此为抗原免疫BALB/c小鼠制备多克隆抗体,利用ELISA和间接免疫荧光对多克隆抗体进行鉴定。结果显示,(1)His-CD2v融合蛋白在293F中以可溶形式表达,SDS结果显示,相对分子质量约为35~80 ku的弥散带;(2)融合表达的His-CD2v能与阳性血清反应,与对照不反应;(3)HisCD2v制备的多抗效价最高达1∶218700,且能与阳性血清竞争性结合CD2v抗原。上述结果表明,His-CD2v融合蛋白的表达及其多抗的成功制备,为进一步筛选CD2v特异性单抗及研制竞争ELISA试剂盒,为非洲猪瘟感染与免疫鉴别方法的建立奠定了坚实的基础。     

Measuring Economic Integration in Developing Countries: The Case of Central America

This article builds a composite index, the Central American Integration Index (IIC-AMPI), to measure economic integration. This index utilises a robust methodology and conceptual framework. The study shows that IIC-AMPI is responsive to variable changes and resistant to outliers. The findings indicate that the Deep Integration Process initiative dominates the current integration trend, as seen in the regional average score from 2015 to 2017, aligning with Guatemala and Honduras. Nicaragua demonstrates the most consistent progress, while Panama lags behind. The evidence supports the Customs Union as Central America's future integration path, highlighting the index's ability to capture the dynamic reality of economic integration.     

Gender Differences in Self-Perceptions and Academic Outcomes: A Study of African American High School Students

There is increasing divergence in the academic outcomes of African American males and females. By most accounts, males are falling behind their female peers educationally as African American females are graduating from high schools at higher rates and are going on to college and graduate school in greater numbers. Some have suggested that school completion and performance is associated with how students feel about themselves. The purpose of this study was to explore gender differences in the relationship between self-perceptions and 2 academic outcomes among a sample of 243 African American high school sophomores. The results suggest that, overall, females are more favorably oriented toward high school completion. Both male and female students with more positive self-perceptions have stronger intentions to complete the current year of high school. Higher grade point averages were more strongly associated with greater self-efficacy for females than for males. Given these findings, increased attention to educational programming, societal messages, and future research is warranted.