全文获取类型
收费全文 | 137篇 |
免费 | 4篇 |
国内免费 | 56篇 |
专业分类
安全科学 | 8篇 |
废物处理 | 7篇 |
环保管理 | 9篇 |
综合类 | 69篇 |
基础理论 | 25篇 |
污染及防治 | 54篇 |
评价与监测 | 11篇 |
社会与环境 | 11篇 |
灾害及防治 | 3篇 |
出版年
2023年 | 3篇 |
2022年 | 9篇 |
2021年 | 12篇 |
2020年 | 4篇 |
2019年 | 6篇 |
2018年 | 4篇 |
2017年 | 8篇 |
2016年 | 13篇 |
2015年 | 13篇 |
2014年 | 9篇 |
2013年 | 13篇 |
2012年 | 6篇 |
2011年 | 10篇 |
2010年 | 7篇 |
2009年 | 6篇 |
2008年 | 7篇 |
2007年 | 10篇 |
2006年 | 8篇 |
2005年 | 3篇 |
2004年 | 3篇 |
2003年 | 1篇 |
2002年 | 10篇 |
2001年 | 8篇 |
2000年 | 3篇 |
1999年 | 4篇 |
1998年 | 10篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1995年 | 2篇 |
1994年 | 2篇 |
排序方式: 共有197条查询结果,搜索用时 15 毫秒
61.
Mats Lindegarth Ulf Bergström Johanna Mattila Sergej Olenin Markku Ollikainen Anna-Leena Downie Göran Sundblad Martynas Bučas Martin Gullström Martin Snickars Mikael von Numers J. Robin Svensson Anna-Kaisa Kosenius 《Ambio》2014,43(1):82-93
We evaluated performance of species distribution models for predictive mapping, and how models can be used to integrate human pressures into ecological and economic assessments. A selection of 77 biological variables (species, groups of species, and measures of biodiversity) across the Baltic Sea were modeled. Differences among methods, areas, predictor, and response variables were evaluated. Several methods successfully predicted abundance and occurrence of vegetation, invertebrates, fish, and functional aspects of biodiversity. Depth and substrate were among the most important predictors. Models incorporating water clarity were used to predict increasing cover of the brown alga bladderwrack Fucus vesiculosus and increasing reproduction area of perch Perca fluviatilis, but decreasing reproduction areas for pikeperch Sander lucioperca following successful implementation of the Baltic Sea Action Plan. Despite variability in estimated non-market benefits among countries, such changes were highly valued by citizens in the three Baltic countries investigated. We conclude that predictive models are powerful and useful tools for science-based management of the Baltic Sea. 相似文献
62.
煤基腐殖酸对外源砷胁迫下玉米生长及生理性状的影响 总被引:1,自引:0,他引:1
为了筛选用于砷污染土壤治理的煤基腐殖酸,采用盆栽实验研究了施用不同种类和浓度的煤基腐殖酸及EDTA对外源砷胁迫下玉米株高、株鲜重、株干重、根干重、砷积累量、叶片抗氧化酶(POD,SOD和CAT)活性和脯氨酸含量的影响。结果表明,11种供试煤基腐殖酸均促进了玉米生长,提高了叶片POD、SOD和CAT活性。其中6和10号腐殖酸可降低土壤砷活性和显著抑制玉米吸收和积累砷,而8和9号腐殖酸增加了土壤活性砷和显著促进了玉米对砷的吸收和累积,且不同程度地强于EDTA。除8和9号外,其余腐殖酸均可明显降低玉米叶片脯氨酸的含量。EDTA可显著促进玉米吸收和积累砷,且加剧了砷对玉米的危害。因此,8和9号供试煤基腐殖酸可以替代EDTA活化土壤砷,与植物配合以提高砷污染土壤的植物修复速度和效果,而6和10号供试煤基腐殖酸则可用于土壤砷钝化剂,以保证作物产品的安全。 相似文献
63.
Huijuan Li Duo Bu Yan Gao Nali Zhu Jing Wu Xiangfeng Chen Jianjie Fu Yawei Wang Aiqian Zhang Guibin Jiang 《环境科学学报(英文版)》2021,33(1):275-280
Pristine alpine regions are ideal regions for investigating the long-range atmospheric transport and cold trapping effects of short chain chlorinated paraffins (SCCPs). The concentrations and alpine condensation of SCCPs were investigated in lichen samples collected from the southeastern Tibetan Plateau. The concentrations of SCCPs ranged from 3098 to 6999 ng/g lipid weight (lw) and appeared to have an increasing trend with altitude. For congeners, C10 dominated among all the congener groups. The different environmental behavior for different congener groups was closely related to their octanol-air partition coefficient (Koa). C10 congeners showed an increasing trend with altitude, whereas C13 congeners were negatively correlated with altitude. Volumetric bioconcentration factors (BCF) of SCCPs reached 8.71 in lichens, which were higher than other semivolatile organic compounds (SVOCs) such as organochlorine pesticides (OCPs), polybrominated diphenyl ethers (PBDEs), polychlorinated biphenyls (PCBs), and hexabromocyclododecane (HBCD). These results suggested that SCCPs were prone to accumulate in the lichen from the air and provided evidence for the role of lichens as a suitable atmospheric indicator in the Tibetan Plateau. 相似文献
64.
医院污水氯化消毒处理的相关因素及探讨 总被引:9,自引:0,他引:9
在医院污水氯化消毒处理中改善污水水质,因地制宜地选择合理的消毒剂和处理工艺流程,限制来苏尔、石炭酸的用量,以降低污水中酚的含量是确保污水消毒效果的重要因素。 相似文献
65.
66.
Microbial diversity of soil bacteria in agricultural field contaminated with
heavy metals 总被引:1,自引:0,他引:1
CHIEN Chihching KUO Yumei CHEN Changchieh HUNG Chunwei YEH Chihwei YEH Weijen 《环境科学学报(英文版)》2008,20(3):359-363
In this study we evaluated the bacterial diversity in a soil sample from a site next to a chemical industrial factory previously contaminated with heavy metals. Analysis of 16S rDNA sequences amplified from DNA directly extracted from the soil revealed 17 different bacterial types (genera and/or species). They included Polyangium spp., Sphingomonas spp., Variovorax spp., Hafina spp., Clostridia, Acidobacteria, the enterics and some uncultured strains. Microbes able to tolerate high concentrations of cadmium (500μmol/L and above) were also isolated from the soil. These isolates included strains of Acinetobacter (strain CD06), Enterobacter sp. (strains CD01, CD03, CD04 and CD08) (similar strains also identified in culture-independent approach) and a strain of Stenotrophomonas sp. The results indicated that the species identified from direct analysis of 16S rDNA of the soil can be quite different from those strains obtained from enrichment cultures and the microbial activities for heavy metal resistance might be more appropriately addressed by the actual isolates. 相似文献
67.
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
68.
69.
广东潮安四望坪铜矿以岩浆期后热液交代充填成矿为特征,在其三位一体(岩浆岩、断裂/层间滑动破碎带、围岩)的控矿组合中,以流纹斑岩、晶屑凝灰岩的层间滑动破碎带为最佳.本文从矿区资料的综合研究入手,深入剖析了岩浆岩、断裂、围岩圈闭条件与矿体规模、富集程度的关系;旨在通过对矿区地质环境与矿床成因的深入分析,建立火山期后热液矿床的断裂控矿模式,为粤东火山岩地区该类矿床的发现提供理论上的启示. 相似文献
70.
建立环境信息共享平台,使环境管理数据实现共享,实现各类数据及时的关联,是环境管理工作发展的必然趋势,将为环境管理提供强有力的技术支撑。信息共享平台利用了大型数据库在性能、安全性、可靠性、数据一致性、分布式处理等方面的优势,将各主要环境业务部门的统计、收费、审批、监测等数据集中管理起来,数据管理人员、各级领导、业务部门员工通过统一的Web界面进行管理、查询分析大量的环境数据,从而简化环境数据管理的难度,提高环境数据管理的水平,大大方便用户对环保数据的访问,提高了数据利用效率。 相似文献