天津滨海新区水生态监测信息系统建设

根据天津市滨海新区的区域水问题,新区的地理和水文特性,发展现状及建设规划,对该区域的水生态监测范围、调查项目、测验方式进行了对策分析,探讨和分析了利用现代化的信息技术,开发建设天津滨海新区水生态监测信息系统的构想,并提出系统建设的设想和思路,以提高系统的实用性和可操作性。     

天津市水文测报信息系统建设构想

阐述利用现代化的信息技术,研究和开发建设天津市水文测报信息系统的构想,分析系统建设对提升水文水资源监测、管理、服务能力,及时为天津市水工程建设管理部门提供种类更多、更全面可靠的水文资料和信息及水资源评价预测成果,为天津市经济社会的可持续发展提供全面优质服务的作用,提出系统建设的设想和思路,并分析系统建设的可行性,以提高系统的实用性和可操作性。     

Teilentfettete Sonnenblumenkerne als Protein-Ressource in der Mast von Broiler

Sunflower seed meal as protein source in nutrition of broiler . Partially dehulled and extracted Hungarian sunflower seed meal was used to replace soybean meal in broiler diets. 295 broiler chicks (Lohmann-Meat) were fed with experimental diets containing 13,26, and 39% sunflower seed meal supplemented with lysine and/or methionine in each ration as a substitute for soybean meal. Diets were formulated isonitrogenous and isoenergetic. Live weight gain and efficiency of feed utilization were similar between the experimental groups and differences were statistically not significant. Results of this work indicate that processed sunflower meal, supplemented with the limiting amino acids can possibly be used to replace soybean meal in diet, without adverse effects on performance or feed efficiency.     

Derivation, growth and applications of human embryonic stem cells

Human embryonic stem (hES) cells are pluripotent cells derived from the inner cell mass cells of blastocysts with the potential to maintain an undifferentiated state indefinitely. Fully characterised hES cell lines express typical stem cell markers, possess high levels of telomerase activity, show normal karyotype and have the potential to differentiate into numerous cell types under in vitro and in vivo conditions. Therefore, hES cells are potentially valuable for the development of cell transplantation therapies for the treatment of various human diseases. However, there are a number of factors which may limit the medical application of hES cells: (a) continuous culture of hES cells in an undifferentiated state requires the presence of feeder layers and animal-based ingredients which incurs a risk of cross-transfer of pathogens; (b) hES cells demonstrate high genomic instability and non-predictable differentiation after long-term growth; and (c) differentiated hES cells express molecules which could cause immune rejection. In this review we summarise recent progress in the derivation and growth of undifferentiated hES cells and their differentiated progeny, and the problems associated with these techniques. We also examine the potential use of the therapeutic cloning technique to derive isogenic hES cells.     

Aerospace Clusters: Local or Global Knowledge Spillovers?

The literature about regional innovation systems, clusters and industrial districts insists on the importance of local knowledge spillovers. Nevertheless, more recently a few authors have put in question the importance of local knowledge spillovers. This paper provides an analysis of some of the most dynamic aerospace clusters in the world, located in Montreal, Seattle, Toulouse and Toronto. We start by discussing theories of clustering, then provide research questions as well as empirical evidence on the international nature of knowledge spillovers. Local knowledge spillovers are less significant, of a different nature, and they may make a scanty contribution to explain the geographical agglomeration of firms. Conversely, international spillovers help to explain the relative dispersion of industry across nations. Resilient geographical clustering is related to the anchor tenant effects as creators of labour pools and owners of very large manufacturing plants creating regional inertia. We thus reject the local knowledge spillover explanation of aerospace clusters in favour of another one based on anchor firms and their effects on the local labour pool.