辛烯-1共聚产品生产、技术发展状况

综述了溶液法生产辛烯-1共聚物的Nova Sclairtech工艺特点,介绍了当前辛烯-1共聚物种类、新产品研究开发以及催化剂的发展状况.     

Providing Reference in a Joint-Use Library

SUMMARY

As a one of a kind joint-use facility between a private university and a county government, the Alvin Sherman Library, Research, and Information Technology Center at Nova Southeastern University (NSU) provides reference services to both NSU students on and off campus and public users. Reference librarians have had to adjust to the variety of users and demands for new services and at the same time find new and creative methods of offering, promoting, and providing instruction about their services to public users as well as NSU's local and distance students. Tracking statistics can assist in identifying user needs.     

国外大石化公司聚乙烯新产品开发进展（上）

综述了2000年以来,国外AtoFina、Equistar、Nova、Dow和ExxonMobil等主要大石化公司对聚乙烯新产品的开发情况,新产品主要包括茂金属聚乙烯、双峰聚乙烯和功能性聚乙烯,较详细地阐述了这些产品的性能和功能,为我国聚乙烯新产品的开发提供了参考.     

Accumulation of mercury and selenium in the brain of river otters (Lontra canadensis) and wild mink (Mustela vison) from Nova Scotia, Canada

Total Hg, methyl-Hg (MeHg) and Se levels were measured in the brain of river otters (Lontra canadensis) and wild mink (Mustela vison) carcasses collected from Nova Scotia, Canada. Total Hg concentrations in the otters' brain were highly variable, ranging from 0.3 to 18.0 μg/g dw and were significantly higher in animals caught from inland areas of the province versus coastal animals. Similarly, inland otters contained significantly more MeHg in the brain than did coastal otters. MeHg was highly correlated with total Hg in both inland and coastal otters and represented on average approximately 82% of the total Hg. Selenium concentrations in the otter brain ranged from 1.0 to 7.8 μg/g dw but unlike Hg, there was no significant difference in Se levels between inland and coastal otters. There was a significant positive relationship between Se and total Hg concentrations in the otters with the molar ratio of Se:Hg approximately 1:1 for animals having an Hg concentration > 18 nmol/g dw.The non-random sampling protocol for the mink precluded extensive statistical analysis of the data. However, unlike otters, virtually all (i.e. 98%) of the total Hg in mink brain was present as MeHg in both inland and coastal mink. Also unlike the otter results, Se concentrations showed no relationship with either total or MeHg in both inland and coastal mink.The data suggest that mink and otters may have different mechanisms for managing high levels of Hg in the brain.     

Factors which influence Nova Scotia farmers in implementing energy efficiency and renewable energy measures

Improvements in energy efficiency and renewable energy use can reduce farm operating costs and reduce greenhouse gas (GHG) emissions. Responses (n=224, representing a 32% response rate) from a mail survey were used to assess use and interest in energy efficient and renewable energy options on farms in Nova Scotia, Canada. Energy efficiency options used the most were behavior, insulation, and lighting. Few farms used renewable energy options. Approximately 78% of farmers indicated an interest in implementing energy efficiency and renewable energy options. Interest varied by farm type and size. Interest increased with farm size. The two main efficiency options of interest were lighting (60.8%) and insulation (43.7%), while wind power development (55.5%) and solar water heating (24.5%) were the main renewable options of interest. Farmers concerned about power and equipment reliability were less likely to be interested in implementing options. Farmers concerned about the environment were more likely to be interested in implementing options. Current use of certain energy efficiency technologies, such as efficient lighting, influenced implementation interest.     

国外大石化公司聚乙烯新产品开发进展（下）

综述了2000年以来,国外AtoFina、Equistar、Nova、Dow和ExxonMobil等主要大石化公司对聚乙烯新产品的开发情况,新产品主要包括茂金属聚乙烯、双峰聚乙烯和功能性聚乙烯,较详细地阐述了这些产品的性能和功能,为我国聚乙烯新产品的开发提供了参考.     

Dead and Dying Shopping Malls,Re-Inhabited

The living dead could be coming to a shopping centre near you! Zombie paintball experiences are just one of many inventive reuses of failing malls identified by architectural educators and writers Ellen Dunham-Jones and June Williamson , who have been tracking trends in suburban retrofits for over a decade. From medical facilities to megachurches, and from offices to community colleges, they cite projects the length and breadth of the US – and beyond – that take advantage of the vast floor areas and parking facilities of these sites, and give them a sustainable future.