排序方式: 共有52条查询结果,搜索用时 14 毫秒
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采用盆栽试验结合DGGE-cloning测序技术比较分析了耐草甘膦转基因大豆M88、GTS40-3-2、ZB及常规非转基因大豆中黄13在成熟期对根际土壤固氮细菌多样性的影响。结果表明,耐草甘膦转基因大豆M88、GTS40-3-2和非转基因大豆中黄13根际土壤固氮细菌多样性指数和均匀度指数无显著差异;抗虫耐草甘膦转基因大豆ZB根际土壤固氮细菌多样性指数显著高于非转基因大豆中黄13,均匀度指数无显著差异。克隆测序结果表明,4种大豆根际土壤固氮细菌主要隶属于α-变形菌纲、β-变形菌纲、γ-变形菌纲、蓝藻纲和一些未知细菌类。相对于不同大豆品种对固氮细菌多样性的影响,耐草甘膦CP4 epsps基因的导入并没有对根际土壤固氮细菌多样性产生显著影响。 相似文献
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Genti Kostandini Bradford F. Mills George W. Norton 《American journal of agricultural economics》2006,88(3):671-679
Biopharming stands to significantly expand the uses of many agricultural crops. This article examines the potential size and distribution of welfare gains from biopharming transgenic tobacco as a source of human serum albumin (HSA) using an economic surplus model under imperfect competition. The results suggest that HSA from transgenic tobacco will generate annual profits for the innovating firm of between $25 million and $49 million. On the other hand, consumers are unlikely to benefit during the patent life of the product given the innovator's market power. 相似文献
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跨国公司农业生物技术垄断、影响及启示 总被引:1,自引:0,他引:1
张彩霞 《生态经济(学术版)》2010,(3)
农业生物技术及其产业发展对推动农业现代化,提高农业综合实力及农业可持续发展具有重要意义,但跨国基因巨头的农业生物技术及市场垄断对发展中国家产生了许多负面影响。文章首先概述了农业生物技术跨国企业的发展及世界主要跨国农业生物技术公司;其次,从农业生物技术专利权的垄断和转基因种子市场集中度两个方面对跨国公司的农业生物技术产业垄断进行了经验分析。研究表明,垄断造成对市场价格的操纵,使发展中国家的农民收益减少,同时对发展中国家的粮食安全产生威胁。 相似文献
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转基因技术与《生物安全议定书》 总被引:1,自引:0,他引:1
高胜 《山东工商学院学报》2004,18(4):61-64,71
指出了转基因技术安全管理争论的焦点问题,对《生物安全议定书》的主要内容做了分析。 相似文献
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汪海珍 《生态经济(学术版)》2005,(8):66-69
本文概述了转基因作物的发展概况与趋势,讨论了转基因作物对农业生态系统的潜在影响及转基因食品的安全性问题,并结合国情对我国转基因作物安全的研究和管理进行了探讨。 相似文献
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经济法律关系是法律关系体系中的一种,是指由经济法调整而产生的经济有机体整体(通常以国家的各种机关为代表)与功能个体(通常指在市场经济中生产经营活动的个人或组织)及功能个体相互间的权利(职权)义务(职责)关系。经济法律关系的显著特性是:二元结构及二重性。二元结构是指,经济法律关系是由两种性质完全不同的权利义务体系构成:其一是,作为社会经济整体代表的经济机关在经济法律活动中形成的权利义务体系;其二是,作为经济功能个体的权利义务体系。二重性是指,经济法主体的同一行为,因其角色二重性,同时处于两重法律关系中,有两重不同的权利义务。 相似文献
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Social media is shaping the way companies and brands engage and interact with consumers, particularly Millennials. In light of this growing trend, this study aims to understand the influence of content quality and brand interactivity within social media on consumers' brand awareness and purchase intentions by proposing an empirical model which is tested using structural equation modeling. The study also explores whether the relation between social media stimuli and offline purchase intention is mediated by hedonic motivation, consumer engagement and brand awareness. Results reveal that the quality of content provided by brands on social media and company-users' interactivity are of major importance to Millennials. They increase the hedonic motive derived by these users from social media, strengthen their online engagement and intensify their brand awareness. This heightened online consumer engagement coupled with an increased online consumer brand awareness leads to an increase in the purchase intention of these brands offline. Consequently, companies are encouraged to invest in producing high-quality content on their social media pages, deploy all possible strategies to enhance brand users’ interactivity given the important role these variables play in entertaining, engaging users online, building brand awareness and influencing their offline purchase intentions. 相似文献