百草枯中毒分析检测方法的研究进展

本文介绍了最近20年来国内外有关生物检材中百草枯的提取、净化及定性定量分析检测方法的研究进展,从而为进一步研究百草枯中毒的分析检验方法提供参考。     

超声提取法在固体毒物检材前处理中的作用

针对实际办案中检材中毒物含量很低时不易检验的问题进行了研究,探索出一种固体检材前处理的超声提取法,能够很好地解决这一问题。本方法具有操作简单,检材用量小,提取效果好、省时省费用的优点。     

血浆中芬太尼的检测

本文概括阐述了近10年国内外检测血浆中芬太尼的基本情况。对各种检测方法及分离净化过程中应用的各种萃取方法进行了对比和分析。在此基础上提出我国药物动力学研究及公安司法工作对检测血浆中芬太尼的新要求。     

马克思研究地租理论的思路与水资源价值的决定

马克思在研究地租理论时发现,广大的农产品的消费者购买农产品不是以价值量为基础,然后认为农产品的价格是由购买者的需要和支付能力决定。他研究地租理论首先从供给的角度出发,碰到理论逻辑矛盾后转向需求的角度。从供求双方的角度研究自然水资源价值的决定,是对马克思劳动价值论的进一步拓展。     

Rents,knowledge and neo-structuralism: transforming the productive matrix in Ecuador

This paper explores the relationship between ground rent, production and knowledge in Ecuador’s neo-structuralist, state-led project to transform the productive matrix. Based upon insights from the Marxian approach to the critique of political economy, we interrogate how neo-structuralism has conceptualised the relationship between ‘natural resource income’ and ‘knowledge-based’ economic development. The paper argues that a rent-theoretical perspective, which takes seriously the regional unfolding of uneven geographical development in Latin America, can highlight the limits of a national development plan conceived according to the logic of Schumpeterian efficiency. In doing so, the paper identifies the contradictory relationship between natural resource exports, state-led ‘knowledge’-based development and capital accumulation. On this basis the paper offers a historically and empirically informed critical analysis of selective import substitution industrialisation and vanguard science and technology strategies designed to transition Ecuador away from primary resource dependence.     

The Resource Curse Reconsidered: Cash Crops and Local Violence in Kyrgyzstan

It is often noted in resource curse literature that agricultural economies are less conflict-prone than countries managing mobile, high-value resources. In the vast literature linking resource endowment and conflict, cash crop economies are often considered immune to civil violence, believed to stand apart from the many horrific episodes of violence and civil war centered on “lootable” wealth (such as alluvial diamonds, tin, tungsten, or other conflict minerals). But many incidents of violence—especially local violence—are in fact occurring in cash crop economies. Drawing on newspaper accounts, policy analyses, ethnographic interviews, and in-depth reports by international organizations, I examine an episode of local violence in 2010 in Kyrgyzstan. Through this case study, the article provides a better understanding of local violence in cash crop economies that can apply to other weak states.     

Cloud point extraction coupled with back extraction: a green methodology in analytical chemistry

Recently, cloud point extraction (CPE) coupled with back extraction (BE) has been suggested as a promising alternative to liquid-liquid extraction. In CPE, non-ionic surfactants in aqueous solutions form micelles and the solution becomes turbid when heated to the cloud point temperature. Microwave- or ultrasonic-assisted BE can be performed after CPE and before injection of the sample for instrumental analysis by ultraviolet-visible spectroscopy, high-performance liquid chromatography, gas chromatography, gas chromatography-mass spectrometry, or liquid chromatography-mass spectrometry. This article reviews selected published scientific research on the application of CPE-BE to the determination of alkaloids, drugs and organophosphorus compounds from several complex matrices. This method could be scaled-up for use in forensic science.     

租:公共政策的意蕴

本文从布坎南关于"租"的论述出发,运用新制度主义方法重新审视"租"的公共政策意蕴,认为公共政策是一种正式制度安排,本质上是关于规定个体和集体选择集的制度安排结构;在制度变迁中,由于不同体制、权利和组织设置而获得的额外收益就是"租",这是公共政策存在的理由;寻租是有成本的,表现为政治交易费用,政府创租和利益集团寻租是不同的两种政治交易过程,表现为公共政策议程;有效率的公共政策选择依赖于制度结构,是制度结构赋予成本和收益以意义。     

明代土地租佃的法律调整

明代法律对租佃关系的调整主要是依据私契关系所确立的规则 ,一方面保护地主的收租权和产业权 ,另一方面也保护佃农的耕作权。随着商品经济的发展 ,地主与佃农之间对土地与佃权的争夺加剧了 ,传统租佃关系发生了新的变化 ,而“永佃”制、“一田二主”的出现 ,正是庶民地主为主干的中国封建地主制出现解体的征兆。     

新型手印提取器的研究

现场勘查中,技术人员对用粉末刷显的手印、灰尘加层手印拍照提取后,再用新型手印提取器提取效果更好。手印提取器使胶带与客体接触面积变小、压力均匀,从而避免在提取过程中产生气泡；同时,胶带具有粘性的一面与另一胶带紧密相粘,通过转动,能制成透明的手印检材,可直接通过印相放大、复印,或通过反差较大的衬底做背景进行比对鉴定。实践证明,运用手印提取器提取的手印具有高质量、手印特征反映好、保存时间长,而且在使用中方便简捷,提取速度快等优点。