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961.
闫启平 《再生资源与循环经济》2013,6(5)
全面分析了我国再生有色金属行业的发展状况和存在的问题,提出行业未来的发展战略,指出我国再生有色金属产业处于起步阶段,和发达国家相比还有很大差距,有着巨大的发展潜力和良好的投资环境. 相似文献
962.
Qi Wang Mengfei Shen Wenjing Li Wanwan Li 《Journal of environmental science and health. Part. B》2013,48(10):810-816
AbstractPesticides are biological or chemical substances used to manage pests and diseases. Encapsulation of pesticides in biodegradable carriers creates a slow-release system that can improve water dispersibility and prolong residual activity. We prepared two kinds of poly (lactic-co-glycolic acid)(PLGA) nanoparticles (NPs) with polyvinyl alcohol (PVA) and sodium dodecyl sulfate (SDS) surfactants. These were used to encapsulate the fungicide fluazinam (Flu) against Rhizoctonia solani using the Shirasu Porous Glass (SPG) membrane emulsification method. Both nanoparticles had uniform spherical shapes with average diameters of 314.13?nm (SDS) and 612.80?nm (PVA). The slow-release microspheres had excellent sustained-release properties, resistance to UV degradation, storage stability, leaf surface coverage and antifungal efficacy compared to the commercial formulation. 相似文献
963.
Bruce P. Hooper Geoffrey T. Mcdonald Bruce Mitchell 《Journal of Environmental Planning and Management》1999,42(5):747-766
It is widely believed that improved resource and environmental management outcomes would occur if those responsible took a longer term view, considered whole systems rather than their components in isolation, and co-ordinated and integrated their activities with each other. There has been substantial action in many countries to achieve these ideals but with mixed success. Why has it not been possible to have a more co-ordinated and integrated approach to resource and environmental management (IREM)? We briefly review various conceptual issues regarding the purpose and character of IREM. The core of the paper is analysis of the factors contributing to success or failure, including the requirement that IREM, in practice, must be based on a careful analysis of the need and scope for integration in a given context, the significance of leadership, information access, and the links with other planning and management activities. Obstacles arising from these and other shortcomings, including the focus regarding what IREM involves, bureaucratic resistance, adverse financial arrangements and property rights problems, are also discussed. The paper concludes with five recommendations as to how to enhance integrated resource and environmental management dealing with need, scope and context, best management practice, information accessibility and integration, financial arrangements,and strengthening local and regional planning capacity. 相似文献
964.
Cheng Hou Xinbai Jiang Na Li Zhenhua Zhang Qian Zhang Jinyou Shen Xiaodong Liu 《Frontiers of Environmental Science & Engineering》2022,16(8):98
965.
Yan Guo Zibin Luo Junhao Shen Yu-You Li 《Frontiers of Environmental Science & Engineering》2022,16(7):84
966.
Ma Yuxia Wang Hang Cheng Bowen Shen Jiahui Li Heping Guo Yongtao Cheng Yifan 《Environmental science and pollution research international》2022,29(24):35760-35767
Environmental Science and Pollution Research - Previous studies have reported that daily average temperature is connected with respiratory diseases (RD), but proof is limited for the influence of... 相似文献
967.
Yue Dengyuan Shen Ting Mao Jiaqing Su Qing Mao Yingying Ye Xiaoqing Ye Ding 《Environmental science and pollution research international》2022,29(32):48233-48249
Environmental Science and Pollution Research - An increasing number of studies investigated the association between air pollution during pregnancy and the risk of eczema in offspring. However, no... 相似文献
968.
Yuan Lilai Liu Jia Huang Ying Shen Gongming Pang Sen Wang Chengju Li Yingren Mu Xiyan 《Environmental science and pollution research international》2022,29(58):87402-87412
Environmental Science and Pollution Research - To comprehensively understand the toxic risks of phthalates to aquatic ecosystems, we examined the acute toxicity of di-(2-ethylhexyl) phthalate... 相似文献
969.
Time-dependent recordkeeping fatigue among youth completing health diaries of unintentional injuries
PROBLEM: Increasingly, investigators are asking youth to self-report daily activity patterns and health outcomes in diary studies. This study assesses recordkeeping fatigue with respect to data quality and event reporting among youth participating in a health diary study. METHOD: Unintentional injury data were collected during a 13-week longitudinal diary study of Ohio youth exposed to agricultural hazards. Two analyses were conducted using data from 2000. Analysis 1 examined trends in discernable recordkeeping errors (DREs) over the course of follow-up. Analysis 2 assessed trends in injury reporting over follow-up. RESULTS: The percentage of items containing a DRE showed a slight, non-significant decline throughout follow-up. Injury reporting declined significantly (p<0.001) over follow-up. SUMMARY: There was no compelling evidence of respondent fatigue with respect to DREs. The observed decline in injury reporting is problematic because estimates of youth injury incidence in health diary studies may vary depending upon the length of the follow-up period. 相似文献
970.
茅坪河流域非点源污染负荷模拟 总被引:13,自引:1,他引:12
为定量化研究茅坪河流域农业非点源营养物质氮、磷的输出负荷,在茅坪河的亚流域陈家冲,利用2004-05~2004-10降雨期的监测数据,通过实测值和模拟值的比较对非点源污染模型SWAT(Soil and Water Assessment Tool)进行了率定和验证,采用Nash-Sutcliffe系数(R2)、均方根差(RMSE)和相对误差(CV)检验实测值和模拟值的拟合度.利用验证后的模型模拟了茅坪河流域营养物质氮、磷的输出负荷量.经验证径流、总氮和总磷的Nash-Sutcliffe系数分别为0.71、0.51和0.62,最小相对误差分别为1.8%、1.1%和10%,模型对氮和磷的输出模拟效果稍差,但对径流的模拟取得了较好的效果,表明该模型可运用于茅坪河流域非点源污染的模拟研究.模拟结果显示,2004-05~2004-10,茅坪河流域共有102.5 t氮和9.46 t磷流入长江,大量农业非点源污染的产生是造成茅坪河水质恶化的重要原因之一. 相似文献