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131.
Man Park Chang-Il Lee Young Jin Seo Sang Ryung Woo Dongill Shin Jyung Choi 《Environmental science and pollution research international》2010,17(1):203-209
Background, aim, and scope
Heavy application of highly toxic synthetic pesticides has been committed to protect crops against insects and diseases, which have brought about serious environmental problems. Thus, an inevitable and fundamental issue has been how to protect crops without harmful effects on nature. As a fascinating nature-compatible approach, we have attempted to hybridize soil-compatible layered double hydroxides (LDHs) with natural antibiotic substances. Only a few of natural antibiotic substances are available for pest control mainly because of their inherent properties such as easy degradability, high minimum inhibition concentration for practical application, and often extremely low availability, whereas LDHs exhibit unique properties such as anion exchange capacity, acid lability, and high affinity to ubiquitous carbonate ion which make them an excellent inorganic matrix to carry labile biomolecules in soils. This study focuses on the behavior of cinnamate–LDH hybrid in soils and the evaluation of its potentials as a green pesticide. 相似文献132.
我国职业危害的现状分析与对策探讨 总被引:6,自引:2,他引:4
邱曼 《中国安全生产科学技术》2008,4(3)
本文分析了我国作业场所存在的主要职业危害因素以及职业危害严重的行业、企业以及人群分布,从目前我国所处的工业化阶段、产业结构、经济结构、经济全球化、农村城镇化、社会保障体制以及职业卫生管理等多个方面分析造成我国职业危害严重的原因,并试图探索遏制我国职业危害严重势头的对策措施. 相似文献
133.
Seth Payton Greg Lindsey Jeff Wilson John R. Ottensmann Joyce Man 《Journal of Environmental Planning and Management》2008,51(6):717-736
This paper measures the benefits of the urban forest by examining its effect on housing prices. A Geographic Information System is used to develop a measure of the urban forest, the Normalised Difference Vegetation Index, from satellite imagery and to construct other variables from a variety of sources. Spatial hedonic housing price models for the Indianapolis/Marion County area are estimated. The models indicate that greener vegetation around a property has a positive, significant effect on housing price, holding everything else constant. This effect is dominated by measures at the neighborhood level. These findings indicate that property owners value the urban forest, at least in part, by the premium they pay to live in neighborhoods with greener, denser vegetation. These findings also indicate that public action to maintain and enhance the urban forest may be warranted. Planners and urban foresters can use these findings to inform public and policy debates over urban forestry programs and proposals. 相似文献
134.
建设项目职业病危害评价中的关键问题探讨 总被引:1,自引:1,他引:1
邱曼 《中国安全生产科学技术》2007,3(1):70-72
在我国现有的建设项目职业病危害评价相关的法规标准中,有许多不够清晰和明确之处。技术改造和改建、扩建项目的辅助设施评价的范围界定不明确,建设项目建设过程中以及外包或转包工作中的职业危害评价,临时聘用人员的职业健康体检与培训等没有包括在评价范围之内。另外,相关的法规标准中,存在制定的接触限值标准的覆盖面有限,检测标准不配套,定量评价方法较为薄弱,部分符合标准的很难简单地评价结论等问题。针对存在的问题,该文进行分析,并提出使之完善的建议,以切实落实《职业病防治法》,真正保障从业人员的身体健康。 相似文献
135.
滇池流域环境变迁及环境修复的社会机制 总被引:6,自引:0,他引:6
沈满洪 《中国人口.资源与环境》2003,13(6):76-80
滇池流域人口、经济的高速增长与滇池水面的迅速缩减,使得滇池流域经济社会活动超过了其环境容量;滇池流域洁净地表水的截流与城乡生产、生活污水向滇池的肆意排放,使得滇池缺少源头活水而成为“污水池”。社会机制是修复滇池流域环境的重要方面。因此,本文特建议:增强居民环境意识,推动绿色社团建设,加强社会舆论监督,发动公众自觉参与。 相似文献
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140.
Jingjing Li Man Qu Mei Wang Ying Yue Zhaofang Chen Ran Liu Yuanqing Bu Yunhui Li 《环境科学学报(英文版)》2021,33(7):1-10
DEHP (di(2-ethylhexyl) phthalate) is an endocrine disruptor commonly found in plastic products that has been associated with reproduction alterations, but the effect of DEHP on toxicity is still widely unknown. Using DEHP concentrations of 10, 1, and 0.1 mg/L, we showed that DEHP reduced the reproductive capacity of Caenorhabditis elegans after 72 hr. of exposure. DEHP exposure reduced the reproductive capacity in terms of decreased brood sizes, egg hatchability (0.1, 1 and 10 mg/L), and egg-laying rate (1 and 10 mg/L), and increased numbers of fertilized eggs in the uterus (1 and 10 mg/L). DEHP also caused damage to gonad development. DEHP decreased the total number of germline cells, and decreased the relative area of the gonad arm of all exposure groups, with worms in the 1 mg/L DEHP exposure group having the minimum gonad arm area. Additionally, DEHP caused a significant concentration‐dependent increase in the expression of unc-86. Autophagy and ROS contributed to the enhancement of DEHP toxicity in reducing reproductive capacity, and glutathione peroxidase and superoxide dismutase were activated as the antioxidant defense in this study. Hence, we found that DEHP has a dual effect on nematodes. Higher concentration (10 mg/L) DEHP can inhibit the expression of autophagy genes (atg-18, atg-7, bec-1, lgg-1 and unc-51), and lower concentrations (0.1 and 1 mg/L) can promote the expression of autophagy genes. Our data highlight the potential environmental risk of DEHP in inducing reproductive toxicity toward the gonad development and reproductive capacity of environmental organisms. 相似文献