Scale, technique and composition effects in the Mexican agricultural sector: the influence of NAFTA and the institutional environment

More than a decade after NAFTA (North American Free Trade Agreement) entered into force, the environmental effects of agricultural trade liberalization in Mexico are still controversial, emerging, and not fully understood. This paper contributes to the literature that aims to explore trends in input use in the agricultural sector in Mexico during the post-NAFTA period among both commercial/industrial and traditional/rainfed farmers, and examines the influence of the national and multilateral institutional framework on these outcomes. We decompose the post-NAFTA agricultural production data into scale, technique and composition effects to estimate the impact that trade liberalization has had on the use of fertilizer and land use, two key agricultural inputs for which reliable aggregate data is available. We conclude that among commercial farmers patterns of crop type specialization and significant technological improvements have led to some declines in fertilizer use but they have been offset by growth in fertilizer use associated with growing agricultural output. Among traditional farmers increased output and specialization in land-intensive grain crops are contributing to an increase in land under cultivation and technological improvements show the potential, but not yet not the strength, to counteract these effects. We analyse the environmental institutional framework and rural development plans, observing that institutional weaknesses have, in several instances, reduced the environmental benefit of technique and composition effects. We conclude with recommendations about how the Mexican agricultural sector might reap the environmental benefits of international agricultural trade.     

富含人性的传统法律及其当代魅力——对“亲亲相隐”原则法律价值的透视

国内外法律实践无可辩驳地证实,任何国家的制定法只有通彻人性,饱含人文关怀,才能够赢得民众的支持,才能真正发挥调整功能。毫不夸张地说,法律的人性化构成了法律的价值基础。而我国古代法律中的"亲亲相隐"制度恰恰抓住了人所具有的悲悯之情。自古至今,它所展现的人性魅力,使法律理性和天然人性实现了有机统一。我们之所以今天依然要推崇"亲亲相隐"制度,就是因为它将为修正我国刑事法律的人性匮乏提供实证支撑。     

论人民调解制度的完善——以“诉调对接”为视角

人民调解是我国民间调解的法定活动形式。进入20世纪90年代以后,由于主客观方面的原因导致其作用日益下降。"诉调对接",即人民法院与人民调解制度的有机结合,不失为完善人民调解制度,发挥其便捷、低廉、快速解纷功能的重要方法。     

Gc亚型检测的复合MS-PCR法及其应用

目的探讨建立Gc亚型检测的复合MS-PCR法及其应用价值。方法根据Gc基因中的2处点突变,设计2对片段相差5bp的等位基因特异性引物和1条公共引物进行复合MS-PCR,分析Gc多态性,并调查武汉地区218例汉族无关个体Gc多态性和鉴定10例亲子关系。结果复合MS-PCR检测的Gc基因型,与AmpliTypePM试剂盒的分型结果一致;武汉地区汉族人群Gc基因的3个常见等位基因Gc1F、Gc1S、Gc2的基因频率分别为0.4816、0.2592、0.2592,观察杂合度(Hobs)、期望杂合度(Hexp)、多态性信息含量(PIC)、个人识别能力(DP)、非父排除率(PE)分别为0.6193、0.6359、0.6253、0.7974、0.3480,基因型分布符合Hardy-Weinberg平衡;真三联体和非真三联体亲子鉴定各5例,前者不排除父子关系,与常规STR分型一致,后者经Gc-MS-PCR分型排除2例。结论建立复合MS-PCR法检测Gc亚型在法医物证鉴定中有实用价值。     

应激相关障碍的损伤程度评定标准之比较与探讨

应激相关障碍的损伤程度评定,因无统一的评定标准,成为司法鉴定中的一个难点和热点。不同专家提出的评定标准中对该类伤害评定为轻微伤、轻伤、或重伤的意见不一,甚至还有对轻伤再分级的,且各家对应激相关障碍的定义亦有差别。本文对有代表性的观点进行比较、分析后,进一步进行探讨并提出见解,认为该类伤害应该属于损伤并应该评定损伤程度。评定必须严格按照《中国精神障碍分类与诊断标准(第三版)》(CCMD-3)进行诊断,按照已有的损伤鉴定标准的原则,根据具体的临床种类、病情程度、病程及预后等综合考量,酌情作出不评定伤情程度,或评定为轻微伤、轻伤或重伤的结论,意在对此问题的解决有所帮助。     

8例利多卡因过敏性休克死的血药浓度分析

目的研究利多卡因过敏性休克死者利多卡因血药浓度及其与死因的关系。方法采用高效液相色谱法(HPLC),分别对使用利多卡因麻醉术中各项指标均正常的8例术中因利多卡因过敏性休克死者的血液和11例顺利完成手术患者的血液进行利多卡因浓度的检测,对比分析两者结果。结果 8例死者利多卡因血药浓度(1．61mg± 0．45mg／L)低于11例正常患者利多卡因血药浓度(2．44mg±0．47mg／L)。结论利多卡因过敏性休克死者血药浓度在正常值范围内,与发生过敏性休克致死无关。     

氟对山羊成骨细胞增殖分化及钙化功能的调节

为探讨氟化物对反刍动物骨骼代谢的影响及对成骨细胞的作用机理,以初生山羊股骨骨膜为材料,采用半消化组织块培养法分离成骨细胞,进行传代培养,并通过形态观察、扫描电镜、碱性磷酸酶(AKP)和矿化结节染色进行鉴定。通过噻唑蓝(MTT)染色、AKP活性测定和钙化结节计数,研究不同浓度的氟对山羊成骨细胞增殖、分化及钙化的影响。结果表明,加氟48 h和96 h后,1.0×10-7~1.0×10-5mol/L氟可促进成骨细胞增殖,其中1.0×10-7及1.0×10-6mol/L氟与对照组差异极显著(P<0.01),高浓度氟(1.0×10-3mol/L)则抑制成骨细胞增殖(P<0.01);而1.0×10-4及5.0×10-4mol/L氟作用48 h对成骨细胞增殖无影响,作用96 h转而抑制成骨细胞增殖(P<0.01)。1.0×10-7~1.0×10-5mol/L氟能显著增强成骨细胞AKP活性及钙化能力(P<0.01),但氟浓度高于5.0×10-4mol/L时,AKP活性及钙化能力明显下降(P<0.01)。证实,低剂量氟能促进体外培养的山羊成骨细胞增殖分化及钙化,高剂量的氟则表现抑制作用。     

新形势下各种社会利益关系和人民内部矛盾问题探讨

我国当前的社会利益关系呈现出来源多样化、主体多元化、差距扩大化、群体弱势化、冲突激烈化等一系列变化。对于新形势下的社会利益关系和人民内部矛盾,既要高度重视,又要正确估价,把握特点。坚持以人为本,区别对待,创新工作机制,协调利益关系,推进第一要务,是正确处理当前各种利益关系和人民内部矛盾的基本原则和思路。     

从非营利组织看事业单位的改革

中国在推进事业单位改革的过程中开始提出和使用非营利组织的概念,正确看待非营利组织现状和在中国公益事业中的作用,让事业单位和民间非营利组织平等发展,甚至相互竞争来促进事业单位提高服务意识和服务质量。使公益性,非营利性得到真正体现,并让改革的成果惠及全体人民。     

Maritime security and the common interests of India and China

The world has changed dramatically over the years, and being two of the world’s largest and most populous developing countries, India and China should remain in close touch on issues concerning developing nations. Today’s challenges to maritime security increasingly comprise more non-traditional threats, such as terrorist acts against shipping, trafficking in weapons of mass destruction, piracy and armed robbery at sea, illicit transportation in narcotic drugs, psychotropic substances and nuclear substances, and smuggling of people and arms. It is therefore important to intensify cooperation at all levels to address threats to maritime security and safety in a comprehensive manner through bilateral and multilateral instruments and mechanisms aimed at monitoring, preventing and responding to such threats.