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801.
802.
大型浮顶储罐浮盘密封圈雷击起火事故分析 总被引:3,自引:0,他引:3
通过对近年来连续发生的大型浮顶储罐浮盘密封圈雷击起火原因分析,找出了浮顶储罐浮盘密封存在的安全问题,探讨了浮盘密封形式与储罐雷击起火事故的关系,并提出对策措施. 相似文献
803.
Researchers have examined the effects of individual job‐related anxiety on employee attitudes and behaviors but have yet to examine whether team job‐related anxiety would have similar or different effects. Building on prior research on negative group affective tone and creativity, we propose that team job‐related anxiety has an inverted U‐shaped curvilinear relationship with both team and individual creativity. Furthermore, we posit that team cooperativeness moderates those curvilinear relationships. Using a two‐wave research design and matched employee‐supervisor data from 290 employees nested in 65 teams, we found support for the proposed inverted U‐shaped relationships. Moreover, the intermediate level of team job‐related anxiety was associated with higher individual creativity in teams with higher cooperativeness. We conclude the study with a discussion of the theoretical and practical implications of our findings. 相似文献
804.
Wenwen Gong Yu Xing Lihua Han Anxiang Lu Han Qu Li Xu 《Frontiers of Environmental Science & Engineering》2022,16(9):113
805.
Xiaoqiang Gong Jinbiao Li Scott X. Chang Qian Wu Zhengfeng An Chengpeng Huang Xiangyang Sun Suyan Li Hui Wang 《Frontiers of Environmental Science & Engineering》2022,16(3):39
806.
Abbas Hasnain Zhao Lindu Gong Xi Jiang Mengyin Faiz Narmeen 《Environmental science and pollution research international》2022,29(45):68016-68034
Environmental Science and Pollution Research - The world becomes advance rapidly, and the demand of perishable food increases in the global market. Food firms perceive the cheapest supply chain... 相似文献
807.
808.
巩亚明 《安全.健康和环境》2006,6(1):43-44
生产安全管理可以归纳为生产过程中对人、设备、环境风险因素的评估、控制和消除的综合管理.生产企业在开展安全性评价工作的基础上,通过应用风险控制的基本方法,可以对企业的安全管理起到积极的主导作用,促进安全生产良性循环. 相似文献
809.
Adsorption of microcystins by carbon nanotubes 总被引:4,自引:0,他引:4
The production of cyanobacterial toxins microcystins (MCs) by cyanobacterial bloom which may promote the growth of tumor in human liver is a growing environmental problem worldwide. In this paper, the adsorption of MC-RR and LR, which were extracted from cyanobacterial cells in Dianchi Lake in China, by carbon nanotubes (CNTs), wood-based activated carbon (ACs) and clays were investigated. Compared with ACs and clay materials of sepiolite, kaolinite and talc tested, CNTs were found to have a strong ability in the adsorption of MCs. At the concentrations of 21.5 mg l(-1) MC-RR and 9.6 mg l(-1) MC-LR in 50 mmol phosphate buffer solution (pH 7.0), the adsorption amounts of MCs by CNTs with the range of outside diameter from 2 to 10nm were 14.8 and 5.9 mg g(-1), which were about four times higher than those by other adsorbents tested. It was shown that with the decrease of CNTs outside diameters from 60 to 2 nm, the adsorption amount of MCs was apparently increased, however the size of CNTs particles formed in solution declined. This result implies that the size of CNTs tube pore that is fit for the molecular dimension of MCs plays a dominant role. Furthermore the specific surface area of CNTs was also found to be a factor in the adsorption of MCs. The results suggested that the selection of suitable size of CNTs as a kind of adsorbent is very important in the efficient eliminating MCs from drinking water in future. 相似文献
810.
Wang MC Gong M Zang HB Hua XM Yao J Pang YJ Yang YH 《Journal of environmental science and health. Part. B》2006,41(4):399-413
In this study, we evaluated the effect of the application by two agrochemicals, methamidophos (O,S-dimethyl phosphoroamidothioate) and urea, on microbial diversity in soil, using the combined approaches of soil microbial biomass analysis and community level physiological profiles (CLPPs). The results showed that both a low and a high level of methamidophos application (CS2 and CS3) and urea application (CS4) significantly decreased microbial biomass C (Cmic) by 41-83% compared with the control (CS1). The soil organic C (Corg) values of CS3 and CS4 were significantly higher and lower by 24% and 14%, respectively, than that of CS1. Similarly to Cmic, the values of Cmic/Corg of the three applied soils which decreased were lower by 31-84% than that of CS1. In contrast, the respiration activity of the three applied soils were significantly higher than the control. Agrochemical application also significantly increased the soil total of N and P (Ntol and Ptol) and decreased the Corg/Ntol and Corg/Ptol values. The CLPPs results showed that the AWCD (average well color development) of the three applied soils were significantly higher than that of CS1 during the incubation period. Substrate richness, Shannon and Simpson indices of microbial communities under chemical stresses, increased significantly. In addition, the CFU (colony-forming unit) numbers of methamidophos metabolized bacteria in CS2 and CS3 also increased significantly by 86.1% and 188.9% compared with that of CS1. The combined results suggest that agrochemicals reduce microbial biomass and enhance functional diversities of soil microbial communities; meanwhile, some species of bacteria may be enriched in soils under methamidophos stress. 相似文献