葡萄穗霉属真菌次级代谢产物及生物活性研究

葡萄穗霉（ Stachybotrys ）属真菌分布广泛,包括了以黑葡萄穗霉（ Stachybotrys chartarum ）为代表的Stachybotrys complementi ,Stachybotrys kampalensi ,Stachybotrys atra 等多个种。葡萄穗霉能产生多种毒素,严重影响人类的健康和生活,因而受到了科学界广泛关注。综述了葡萄穗霉属真菌所产生的次级代谢产物以及生物活性。     

一个新颖的物流车系统设计

针对四轮自主移动物流车转向不灵活、自身所占空间较大等不足,提出了一个两轮自平衡物流车,对该物流车进行了机械结构设计、控制系统设计和感知系统设计,为进一步的研究提供实验平台。     

家电逆向物流的委托-代理政府激励机制研究

废旧家电逆向物流过程中家电生产企业承担主要责任,政府开始推行生产者责任延伸制度。为了避免产生道德风险问题,政府应该建立合理有效的激励机制来推动家电生产企业实施逆向物流。根据委托-代理理论,设计出信息不对称情况下的单阶段单任务委托-代理模型。为政府对家电生产企业的激励提供一种有用的分析工具。     

浅议美国文化中影响美语词语的几个因素

通过实例可以看到美国文化中历史、个体主义、政治、创新精神对美语词语的影响,作为美国文化信息的载体和美国文化主客观的表现形式的美语词语,真实地反映了美国社会的现实以及美国社会独有的文化特征和风貌.     

供应链风险管理研究综述——信息风险管理

对信息共享中信息管理方式、牛鞭效应、供应链逆向选择和道德风险产生的供应链信息风险的研究成果进行综述,提出了供应链信息风险管理研究的新方向、新问题。     

基于SWOT分析的哈尔滨湿地旅游开发对策研究

哈尔滨湿地是我国面积最大的多样性城市河流湿地,生态环境良好,湿地类型较多,生物资源丰富,具有良好的湿地开发的基础和前景。但是由于哈尔滨湿地旅游开发还处于起步阶段,在湿地的利用与保护方面还存在诸如水污染严重、开发过度、旅游设施落后、缺乏专业人才等问题。只有保证湿地水源,以保护为前提开发,控制污染,培养引进专业人才,才能实现湿地旅游开发与生态环境保护的协调发展。     

脂质体及传递体的研究概况

本文介绍了脂质体的结构、制备和作用特点以及一种新型的经皮给药载体一传递体,比较了传递体与脂质体的优缺点,并对传递体制备、性质进行了综述,提出了对传递体的展望。     

英语阅读教学中的学习策略培养

阅读技能在英语学习基本技能中占有很重要的地位,有效的学习策略的培养尤为关键。英语阅读课堂中的学习策略培养需要注重背景知识介绍,阅读材料的选择,阅读策略的训练和阅读教学策略,以培养学生自主学习能力,最终使其阅读能力得到提升。     

Motivations for implementing voluntary environmental actions in Argentine forest companies

Several motivations play an important role in the design and implementation of voluntary environmental actions in forestry, which include systems and procedures of production that minimize environmental impacts and satisfy eco-demanding customers. The aim of this study was to explore what motivations inspire forest managers from large landholding companies in the Northeast of Argentina to implement voluntary actions and how these motivations are perceived outside the companies. To achieve the objective we compared the opinion of private foresters and companies’ external consultants who scored motivations based on their importance as driving forces for environmental initiatives. The findings were also compared with motivations described for North American foresters. Multiple factors motivated the companies to participate in voluntary environmental actions following a four driver model with five motivational mechanisms defined as Learning, Signaling, Economic, Legal and Moral. Results showed that of the thirteen analyzed motivations, only two: effective resource management and corporate social responsibility differed significantly between Argentine foresters and consultants and were higher ranked by foresters. Both corresponded to the motivational mechanism Signaling. Our findings confirm that market pressure (via forest production certification) or the enrichment of the company image (through corporate social responsibility) were major motivations but not the only ones. In coincidence with foresters in USA, legal followed by moral motivations were major drivers and were more valued than financial gains. In Argentina bottom up mechanisms influenced by the individual concern for the environment of the decision makers and other workers seemed to be distinctive. Discrepancies between Argentine foresters and consultants highlighted the need to address some improvement in management and communication beyond the company.