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391.
Yang Liu Wenhua Tan Xingqiang Wu Zhongxing Wu Gongliang Yu Renhui Li .Key Laboratory of Aquatic Biodiversity Conservation Biology 《环境科学学报(英文版)》2011,(1)
A water bloom sample collected from Lake Dishui in Shanghai was characterized.The morphological identification showed that Micorcystis wesenbergii and Micorcystis smithii were the main component of the bloom.Five strains of M.smithii were successfully isolated.Their 16S rRNA gene sequences based phylogenetic tree showed that the five strains of M.smithii intermixed with strains of other morphospecies in Microcystis.A fragment of mcy gene encoding for microcystin synthetase was detected in one of the five M.... 相似文献
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J. Sedfrey S. Santiago Wilfred S. Manuela Jr. Marion Lara L. Tan Siegfried Kiel Sañez Aldo Zelig U. Tong 《Disasters》2016,40(4):644-667
Typhoon Haiyan struck the Philippines on 8 November 2013 with maximum sustained winds of 235 kilometres per hour, adversely affecting at least 11 million people and displacing some 673,000 in the central regions of the country. The disaster clearly overwhelmed the Philippine government despite its seemingly well‐crafted disaster management plan. Using timelines of different organisations, this paper identifies gaps in the government's response, mainly due to its failure in coordinating and managing relief operations, which adversely affected its effectiveness and efficiency in the delivery of critical goods and services following the disaster. The paper also demonstrates how non‐governmental organisations (NGOs), the United Nations, foreign governments and other organisations provided assistance, mainly through aid niching, to cover the government's shortcomings. The paper recommends a paradigm shift in the government's disaster response by integrating collaborative arrangements between government agencies and NGOs, and giving local governments the lead role, with the national government as support, in disaster planning and response. 相似文献
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Impacts of continuously regenerating trap and particle oxidation catalyst on the NO2 and particulate matter emissions emitted from diesel engine 总被引:1,自引:1,他引:0
Zhihua Liu Yunshan Ge Jianwei Tan Chao He Asad Naeem Shah Yan Ding Linxiao Yu Wei Zhao 《环境科学学报(英文版)》2012,24(4):624-631
Two continuously regenerating diesel particulate filter (CRDPF) with different configurations and one particles oxidation catalyst (POC) were employed to perform experiments in a controlled laboratory setting to evaluate their effects on NO2, smoke and particle number emissions. The results showed that the application of the after-treatments increased the emission ratios of NO2/NOx significantly. The results of smoke emissions and particle number (PN) emissions indicated that both CRDPFs had sufficient capacity to remove more than 90% of total particulate matter (PM) and more than 97% of solid particles. However, the POC was able to remove the organic components of total PM, and only partially to remove the carbonaceous particles with size less than 30 nm. The negligible effects of POC on larger particles were observed due to its honeycomb structure leads to an inadequate residence time to oxidize the solid particles or trap them. The particles removal efficiencies of CRDPFs had high degree of correlations with the emission ratio of NO2/NOx. The PN emission results from two CRDPFs indicated that more NO2 generating in diesel oxidation catalyst section could obtain the higher removal efficiency of solid particles. However this also increased the risk of NO2 exposure in atmosphere. 相似文献
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通过职业病危害现场调查,分析了某MTBE装置的生产工艺、装置存在的主要职业病危害因素、检测结果、职业病危害防护措施,找出了职业病危害的关键控制点,并提出了防护对策. 相似文献
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应用双室堆沤肥技术,以弥苴河口湿地植物残体、湿地底泥和当地养殖业废物制成双室堆沤肥,按不同配比设计5种施肥处理方案进行还田试验。对比研究施肥前后的蔬菜产量、蔬菜品质、土壤肥力以及土壤根际微生物,发现:方案A[50%~60%植物残体(收割物)+40%~50%养殖业废物+微生物菌剂(3 kg/t),活性液体肥作追肥,农药同习惯施肥]对增加蔬菜产量、提高蔬菜品质、增加土壤肥力和改善土壤微生态环境效果最好。在实际应用中也可适当增加1 0%~20%的湿地底泥,相应减少养殖业废物量。 相似文献