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971.
炼油厂碱渣的治理与综合利用 总被引:11,自引:0,他引:11
余伟 《石油化工环境保护》2001,24(2):43-45
从武汉石化厂碱渣来源分析碱渣污染物特征和游离碱浓度,概述并浅析目前国内碱渣处理工艺,重点介绍我厂减渣治理中源头控制,分质处理,二次利用的环保效益和经济效益并重的工作思路及碱渣治理的实践。 相似文献
972.
A retrospective study was designed to examine the perception of care in women who had experienced a second-trimester termination of pregnancy (TOP) for a neural tube defect. Women were identified over a 3-year period, 1983–1985. After appropriate consent, 166 women were visited at home between 4 weeks and 7 months post-TOP and interviewed by one experienced interviewer using a structured questionnaire with open and closed questions. The majority (137, 82 per cent) felt satisfied with the care received during screening, prenatal diagnosis, and during the TOP (126, 76 per cent). Patients were less satisfied (63, 38 per cent) with post-TOP care in hospital. On leaving hospital, the post-termination sequelae were mentioned to only 25 (15 per cent) patients, which left 135 (81 per cent) confused and bewildered by the post-partum reactions of their bodies, and by their strong emotions. After-care was perceived as unsatisfactory by 113 (68 per cent). One-quarter (42, 25 per cent) did not have, and were not invited for, a post-termination appointment and thus did not have an opportunity to ask questions or to discuss the fetus. Eighty-six (51-8 per cent) had no visit from any member of the primary health-care team, yet most would have appreciated such a visit. Suggestions for improved management are presented. 相似文献
973.
从生物技术的应用和生物安全管理两个方面论述了环境保护中生物技术的现状和趋势。具体比较了国内外技术应用和安全管理的差异,尤其是EU、USEPA和UENP生物安全管理体系对我国的借鉴使用。认为实施生物安全管理是推动环境科学中生物技术发展的关键。应实施技术研发和风险防范并举的政策。 相似文献
974.
A. M. Avis 《Journal of Coastal Conservation》1995,1(1):41-50
A total of 17 sites along the eastern Cape coastline, which had been established with indigenous species, were sampled to
assess species composition and abundance. The areas sampled ranged from small blowout dunes of 1 ha, to extensive transverse
dune fields of 134 ha; age at the time of sampling ranged from 2 to 20 yr. The total mean percentage cover and density, alpha
diversity and importance values of all the species were calculated and used to describe each site. A TWINSPAN analysis grouped
sites of similar localities, mainly on the basis of their species composition. A DECORANA plot revealed that axis 1 corresponded
to the position of sites along the coastline rather than other factors, such as age. The variability in species composition
was related more to the types of species used for stabilization, rather than the natural distribution of the indigenous dune
vegetation. The species ordination showed a similar gradient, and it was possible from this analysis to determine which species
were more commonly used and better suited for dune stabilization. It is concluded that successful stabilization can be achieved
using indigenous species. 相似文献
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978.
美国洪泛平原管理的新方向 总被引:1,自引:0,他引:1
根据美国联邦跨机构洪泛平原管理审查委员会对密西酉比河1993年特大洪水的调查分析以及对美国现行洪泛平原管理方式、水土资源规划的原则与准则等的评价,简要介绍现有管理方式存在的问题与发展方向,为我国从事洪泛区规划与管理提供参考信息. 相似文献
979.
依法做好地震应急是减轻地震灾害的关键环节 总被引:2,自引:0,他引:2
本文结合当前地震形势及地震灾害的突发性、社会性、广泛性,对《破坏性地震应急条例》作了阐述,进而论证了依法搞好地震应急总工作是减轻地震灾害的重要环节。 相似文献
980.
David E. Kromm Stephen E. White 《Journal of the American Water Resources Association》1990,26(6):999-1012
ABSTRACT: The High Plains has been viewed as an immense garden because of its highly productive agricultural system based on irrigation. But there is concern that the aquifers are being depleted and that the region may be returning to its natural state of a vast shortgrass prairie. Efforts to avoid this scenario and to ensure continued survival of the integrated agribusiness economy focus on conserving water in irrigation. This paper examines the adoption of 39 water-saving practices for ten counties in Kansas, Nebraska, Oklahoma, and Texas. The frequency of adoption was estimated from a survey of 709 irrigators, and the variance was found primarily to be a function of location and secondarily to be influenced by number of wells, type of irrigation system, depth to water, age, and education. Locational differences remained strong even when the influence of secondary factors were controlled. 相似文献