农村宅基地产权制度效率研究

总结了我国农村宅基地产权制度的现状：中央政府为主导的农村宅基地产权模糊化;地方政府为主导的农村集体和农民宅基地产权弱化;地方政府应和农村集体和农民自发的宅基地产权强化。并分析了我国农村宅基地产权制度效率低下的原因主要是产权制度不完整、国家垄断制度供给。     

PCA和PLS-DA用于晒青毛茶级别分类研究

利用主成分分析法(Principal Component Analysis,PCA)和偏最小二乘法判别分析(Partial Least Squares Discriminant Analysis,PLS-DA)对晒青毛茶进行级别分类,并通过统计分析找出重要理化成分。结果表明:PCA和PLS-DA均可以直观地对晒青毛茶级别进行分类,其中能够稳定地分类出3级毛茶,而难以将6级和9级毛茶明显地分类。通过PCA载荷图(Loadings plot)和PLS-DA变量重要性因子(Variable important for the projection,VIP)分布图可得出氨基酸含量为级别分类的重要理化成分,其中赖氨酸(Lys)、脯氨酸(Pro)和苯丙氨酸(Phe)是对级别分类最重要的3种氨基酸组分。     

应用RACE技术扩增驴DGAT1基因3′端及序列分析

DGAT1（脂酰辅酶A：二脂酰甘油酰基转移酶）基因是产奶性状的一个重要功能侯选基因。由于通过预测奶牛DGAT1基因序列与马属动物DGAT1基因序列具有98%的同源性,本试验从影响牛产奶性状的DGAT1基因出发,以驴乳腺组织的RNA为模板,按照不同物种DGAT1基因的相似性设计特异引物,运用PCR和3′RACE技术扩增并获得了特异片断,特异片段回收纯化连接到pUCmT Vector载体后,转化到大肠杆菌中并筛选阳性菌落;提取质粒进行测序,结果发现该段序列与预期的目标一致,通过与其他动物同源性比较分析说明已首次克隆到驴DGAT1基因3′端。     

The Economics of Horticultural Biotechnology

Abstract

Technological change has driven economic progress in agriculture and will continue to play a crucial role in die 21st century. The latest wave of technological change in agriculture is based on die ability to specifically modify crop genetics dirough recombinant DNA techniques. Biotech crop varieties have been adopted on a wide scale in some agronomic crops, but horticultural crops face hurdles for commercialization. Market barriers are blocking die production of biotech horticultural crops diat have already been developed. High costs for research, development and regulatory approval combined with the small acreages planted and the diversity of varieties limit die potential for profitable applications of biotechnology for many fruits and vegetables, tree fruits and nuts, and nursery and landscape crops. Like most technological changes in agriculture, die introduction of modern biotechnology has met with spirited political opposition from some quarters. Such opposition could discourage adoption of biotech products that are wanted by some consumers, can be profitable for growers and could reduce the environmental impacts of crop production.     

土地征用补偿分配过程中保护特殊群体权益的建议

土地征用补偿费分配不公、土地租赁款分配不公、同一情况村民不能得到同一标准补偿等问题已经成为涉农信访的主要问题,涉及到的人员主要是农村婚嫁妇女、小城镇户口人员等特殊群体,这些问题如果不能很好地解决将成为农村社会的不稳定因素。从特殊群体的介绍、侵害特殊群体利益的案例、问题产生的原因剖析以及可能的解决方法入手来阐释保护特殊群体利益的建议。     

长期接触有机磷农药的农民体内自由基含量的调查报告

[目的]调查长期接触有机磷农药的农民体内自由基的含量。[方法]随机抽取豫北农村地区长期接触有机磷农药的农民790人,分别检测其体内MDA、SOD、GSH-PX、LPO含量。[结果]接触有机磷农药10年以上的农民体内自由基含量明显增加,但增加量无年限差异。[结论]农民长期接触有机磷农药会引起体内自由基含量增加。     

Reshaping women's land rights on communal rangeland

This paper aims to contribute to the debates on communal rangelands and analyses the gendered dimension of land rights and land access in the rural areas of Namaqualand. The actual gender relations within rural communities and the emergence of strategies that are being pursued in communal land processes are obscured and often ignored in policies about communal rangelands, which overemphasise ‘the ecological and economic impact’ and the balancing of these dimensions. As active, primary users, women play a central role in livelihoods supported by communal rangelands yet their access to land is mediated through their relationships with men, effectively circumventing women's land autonomy. A wider debate is necessary to advance the largely superficial policy considerations of women's position in relation to communal rangelands land and their social exclusion on the basis of traditional control of land, forms of access and claiming of use rights. The paper discusses the complexity of land rights under communal land tenure and argues that, despite traditional and policy barriers, women in traditional systems of male-dominated land rights have had some success in accessing communal rangelands. Greater policy impetus is necessary to leverage equitable and independent land access for women amidst debates about management of communal rangelands.     

论Trips协议下我国报刊社之版权及有关权

报刊社作为重要的传播者,在传播作品的过程中,所享有的权利主要分为著作权与邻接权。根据Trips协议的有关规定,我国近几年来对版权法律制度进行了一系列的修改。本文对报刊社在现行版权法中的权利做了详细的分析,并指出报刊社的转载权与Trips协议的精神不符及相应的立法建议。     

Antigen-nonspecific macrophage factors modulating the antibody response in vitro

Antibody response to an antigen involves the co-operation between three types of cells: macrophages, T cells and B cells. The cognate interactions between these cells play a fundamental role in the expression of a specific antibody response, but the last is modulated by antigen-nonspecific soluble factors produced either by macrophages or by T cells. Macrophages elaborate a spectrum of molecules modulating the function of lymphoid cells; among them are IL1 and prostaglandins of the E series, which are respectively enhancer and inhibitor of the antibody response in vitro. These molecules alter T cell and B cell activities through different mechanisms involving activation or inhibition of IL2 production, or alteration of cells surface antigens. However, the cellular events following the fixation of soluble factor on its receptors are not known.     

某考试系统评分模块的边界值测试用例设计

边界值分析(Boundary Value Analysis)技术扩展了对等价类中起始和末尾输入值可能性的分析。输入输出数据中很大百分比的功能性错误都发生在这些边界上,或这些边界值的周围。介绍了边界值分析的基本概念和测试用例设计原则,以某考试系统的评分模块为背景,进行了边界值测试用例的设计。