Ein kompetitiver Immunoassay zur Bestimmung des Herbizids Fluazifop in Trink- und Grundwasser

A Competitive Immunoassay for the Determination of the Herbicide Fluazifop in Drinking Water and Groundwater A competitive solid-phase enzyme immunoassay using rabbit polyclonal antibodies was developed for the detection of the herbicide fluazifop [(RS)-2-[4-(5-trifluoromethyl-2-pyridyloxy)phenoxy]propionic acid] in drinking water and groundwater. Present regulatory limits for drinking water in Germany were taken as the critical level. The carrier protein was bovine serum albumin; horseradish peroxidase was used as marker enzyme with 3,3′,5,5′-tetramethylbenzidine as substrate. A high concentration of high-affinity antibodies in the serum, optimization of test conditions (antibody and enzyme tracer concentration, incubation time etc.), and very low cross reactivities to substances of similar structures led to a highly sensitive and specific ELISA with a detection limit below 0.1 μg/L for fluazifop as free acid. On testing the suitability of the assay's use as a screening test with one hundred drinking-water samples, the three samples which had been spiked in the laboratory were recognized as positive with respect to their fluazifop content. Confirmation by gas chromatography-mass spectrometry showed the test results of two other samples to be false positive. False negative results did not appear. The concentration was in the detection limit region of 0.1 μg/L.     

西南地区中药产业发展

本文总结西南地区中药产业发展现状,分析西南地区中药产业中药材、生产加工和研发能力上的竞争优势,提出西南地区中药产业的发展对策。     

延庆发展奶牛的气候优势

依据奶牛生物学特性及与气象条件关系,利用延庆地区30年的气候资料,从地理位置、体高、适温条件、不适温条件、温湿指数、相对湿度和日照、风寒指数、饲料条件等多方面,分析论证了延庆在发展奶牛相对于北京平原地区的气候优势.综合分析表明,相对于北京平原地区,延庆气候更适于发展奶牛养殖.     

郑州市都市农业发展的有利条件及产业模式研究

分析了都市农业的起源和在我国的发展概况,指出了发展都市农业的意义、作用和郑州市发展都市农业的有利条件,进一步探讨了郑州市发展都市农业应采取的产业模式,即:设施农业、生态农业、加工农业、创汇农业、绿化农业和观光休闲农业等.认为郑州市发展都市农业意义重大,时机已基本成熟,必须转变观念,正确选择产业模式,加强理论研究和多学科联合攻关,稳步推进郑州市都市农业的发展.     

构建旅游中心城市之研究——以荆门市为例

在探讨旅游中心城市概念、地位及作用的基础上，以荆门市为例，分析了荆门市旅游产业发展中存在的问题、研究了荆门市建设为区域旅游中心城市的条件和优势，包括较为发达的城市经济、丰富的资源、良好的区位、科学的规划、完善的设施等，并借用中心地理论来说明荆门市应该成为区域旅游中心城市，最后列出了具体思路。     

机载LIDAR技术的优势及应用前景研究

机载三维激光雷达测量(以下简称机载LIDAR—Light Detection and Ranger)技术是继GPS以来在测绘领域的又一场技术革命,它以高精度、高密度、高效率、产品丰富等特点在测绘领域得到较好的应用和广泛的关注,具有巨大的发展空间和潜力,它代表了测绘领域又一个新时代的到来。本文着重介绍了机载LIDAR的测量原理、技术特点,进而总结出机载LIDAR技术优势和应用前景。     

Legitimization through patronage? Strategies for political control beyond ethno-regional claims in Darjeeling,India

This paper asks how contending political leaders legitimize their authority in a competitive authoritarian regime. It contends that ‘legitimization through patronage’ is an important means of convincing the public of the rightfulness of a leader’s authority when ‘ideology-based normative legitimacy’ is declining and the formal electoral route is not available. Drawing on an understanding of legitimacy that accounts for leaders’ strategies and public receptions, the paper seeks to explore the moral norms and values on the basis of which followers evaluate leaders’ performance. Drawing on anthropological studies of patronage in South Asia not only helps to transcend an exclusively instrumental understanding of patronage by stressing its moral dimension but also complements comparative politics’ focus on the national level by studying the everyday processes through which political leaders’ legitimacy is locally constructed and contested in patronage relations. Evidence from Darjeeling in northern West Bengal/India (where the State’s preferential treatment of a regional party claiming leadership of a movement for regional autonomy has contributed to the establishment of a dominant party regime) highlights patronage’s potential as a legitimating strategy – but it also reveals its practical limits. While the establishment of resource monopolies over developmental funding helped leaders of the ruling party to “feed” their support networks and foster reputations as selfless “social workers”, differing bases for the evaluation of leaders, the growing expectations of followers, and dependence on external patronage resources limited the long-term success of patronage as a legitimating strategy. This, in turn, enabled the State to curtail demands for autonomy by controlling regional elite construction.     

EXTERNAL SOURCES OF URBAN COMPETITIVE ADVANTAGES IN CHINA

The urban competitiveness(UC )depends notonly on re- sources, but also on capacitiesthatcities themselves have. But asa dynamic process, theexternalenviron- ment of citiesbringscertain"prompting" or "obstruc-t ing"forurban compe titio.nAlong withtheintern…     

集群产业优势对区域品牌形成的作用机理研究——以温州典型产业集群为例

为了获得集群产业优势与区域品牌形成之间的作用机理,在回顾大量相关文献的基础上,从理论层面推导出集群产业优势的构成维度;通过对温州集群品牌的深访研究,获得维度构成和测量指标,印证和修正理论模型,开发量表和设计问卷;并以温州典型产业集群为例,对影响区域品牌形成的集群产业优势进行实证研究。结论证实集群产业优势的4个维度(成本优势、产品优势、创新优势和营销优势)对区域品牌形成均具有显著作用。     

战略耦合的研究脉络与问题

在回顾经济地理学中较为前沿的战略耦合概念的起源、发展与研究现状的基础上,对战略耦合研究的优点与问题展开评述,认为当前研究在战略耦合模式的探讨中,主要基于经验总结而缺乏对影响变量,特别是空间变量的阐述,存在一定的模糊性。为理解该问题的根源,追溯了全球生产网络和全球价值链两个学派的争论和最新进展。在认可全球价值链理论解释力的同时,认为当前全球生产网络2.0版本的研究框架仍然没有解决模糊性的问题,而且全球生产网络的分析框架主要侧重于主导企业视角来构建战略耦合的发生机制,忽略了后发地区和企业的主动性。因此,借鉴传统经济地理学研究,充分考虑主导企业和后发地区的行为逻辑,提出经济活动的空间粘性和区域的区位优势这两个变量,重构了战略耦合的分析框架,并进行理论阐述。该项理论构建有助于更好地厘清战略耦合的发生机制,帮助发展中国家和地区判读发展机遇,确立产业发展与升级战略。