全文获取类型
收费全文 | 1457篇 |
免费 | 98篇 |
国内免费 | 542篇 |
专业分类
安全科学 | 98篇 |
废物处理 | 72篇 |
环保管理 | 103篇 |
综合类 | 918篇 |
基础理论 | 233篇 |
污染及防治 | 411篇 |
评价与监测 | 78篇 |
社会与环境 | 117篇 |
灾害及防治 | 67篇 |
出版年
2024年 | 2篇 |
2023年 | 23篇 |
2022年 | 88篇 |
2021年 | 75篇 |
2020年 | 68篇 |
2019年 | 66篇 |
2018年 | 73篇 |
2017年 | 56篇 |
2016年 | 74篇 |
2015年 | 97篇 |
2014年 | 105篇 |
2013年 | 143篇 |
2012年 | 116篇 |
2011年 | 158篇 |
2010年 | 112篇 |
2009年 | 92篇 |
2008年 | 90篇 |
2007年 | 91篇 |
2006年 | 78篇 |
2005年 | 52篇 |
2004年 | 38篇 |
2003年 | 45篇 |
2002年 | 55篇 |
2001年 | 41篇 |
2000年 | 36篇 |
1999年 | 39篇 |
1998年 | 24篇 |
1997年 | 29篇 |
1996年 | 27篇 |
1995年 | 28篇 |
1994年 | 24篇 |
1993年 | 16篇 |
1992年 | 14篇 |
1991年 | 9篇 |
1990年 | 1篇 |
1989年 | 6篇 |
1988年 | 2篇 |
1986年 | 2篇 |
1982年 | 1篇 |
1978年 | 1篇 |
排序方式: 共有2097条查询结果,搜索用时 7 毫秒
321.
Anping Zhang Xuemei Xie Jing Ye Chunmian Lin Xiaoyan Hu 《Environmental Chemistry Letters》2011,9(3):369-373
In recent years, the stereoselective toxicity of chiral organophosphorus pesticides has received increasing attention from
environmental toxicology scientists. In an attempt to explore the stereoselective effects of chiral organophosphorus pesticides
on non-target organisms and enzymes, this work investigated the stereoselective toxicity and inhibition of malathion, malaoxon
and isomalathion on Daphnia magna and on acid α-naphthyl acetate esterase extracted from wheat flour, respectively. Toxicity differences were observed between
the two enantiomers of malathion and malaoxon and among the four stereoisomers of isomalathion in the LC50 values on D. magna and the IC50 values on acid α-naphthyl acetate esterase. Enantiomers with (R)-configuration in all the tested compounds showed
higher toxicity to D. magna than their (S)-forms and racemic forms. Racemic malaoxon and isomalathion showed the strongest inhibition on acid α-naphthyl
acetate esterase compared to their respective enantiomers and stereoisomers. 相似文献
322.
长株潭城市群核心区土地利用生态风险评价 总被引:7,自引:0,他引:7
随着长株潭城市群的快速发展,人类活动导致的土地利用结构及方式改变对生态环境构成了巨大压力。运用G IS和景观生态学方法的土地利用生态风险评价,以长株潭城市群核心区为研究区域,选择湘江岸线为典型样带,建立了基于源与汇景观功能的土地利用生态风险评价指标体系,并构建了评价模型,对生态风险进行了空间分析和综合评价。结果表明,长沙市建成区的土地利用生态风险指数整体最高,株洲和湘潭居次。其中,从城市群建成区向外,风险指数逐渐降低,长沙、株洲、湘潭三市交界处生态风险指数也较低。根据研究区域生态风险状况、变化和分布特征,提出了相应的风险调控策略和管理方法,为实现区域土地利用与生态、社会、经济的可持续发展提供决策依据。 相似文献
323.
Chlorine dioxide (ClO2) disinfection usually does not produce halogenated disinfection by-products, but the formation of the inorganic by-product chlorite (ClO2–) is a serious consideration. In this study, the ClO2– formation rule in the ClO2 disinfection of drinking water was investigated in the presence of three representative reductive inorganics and four natural organic matters (NOMs), respectively. Fe2+ and S2– mainly reduced ClO2 to ClO2– at low concentrations. When ClO2 was consumed, the ClO2– would be further reduced by Fe2+ and S2–, leading to the decrease of ClO2–. The reaction efficiency of Mn2+ with ClO2 was lower than that of Fe2+ and S2–. It might be the case that MnO2 generated by the reaction between Mn2+ and ClO2 had adsorption and catalytic oxidation on Mn2+. However, Mn2+ would not reduce ClO2–. Among the four NOMs, humic acid and fulvic acid reacted with ClO2 actively, followed by bovine serum albumin, while sodium alginate had almost no reaction with ClO2. The maximum ClO2– yields of reductive inorganics (70%) was higher than that of NOM (around 60%). The lower the concentration of reductive substances, the more ClO2– could be produced by per unit concentration of reductive substances. The results of the actual water samples showed that both reductive inorganics and NOM played an important role in the formation of ClO2– in disinfection. 相似文献
324.
从含油废水中筛选分离到1株原油降解菌XD-1,鉴定为假单胞菌(Pseuomonas sp.).初步实验表明菌XD-1具有较强的产表面活性剂乳化原油的作用,对该菌的产表面活性剂性能进行了研究.实验证明,菌XD-1所产表面活性剂为脂肽类物质,菌在生长对数期产表面活性剂,表面活性剂的产生为生长相关型;充足的碳源是产表面活性剂的必需条件,菌利用原油为碳源时能持续大量地产表面活性剂;原油和尿素为产表面活性剂的最适碳源和氮源,菌XD-1产表面活性剂的最佳营养培养基组成为葡萄糖10 g,尿素4 g,磷酸二氢钾1 g,微量元素液4 mL,水1 L,pH 8.0. 相似文献
325.
Chen Xiude Chen Guocai Lin Miaoxin Tang Kai Ye Bin 《Environmental geochemistry and health》2022,44(9):2919-2942
Environmental Geochemistry and Health - Rampant corruption exists in China’s energy-intensive industries. However, we know little about the nexus of corruption and enterprise green innovation... 相似文献
326.
Wang Xue-Ting Deng Xudong Zhang Tuo-Di Zhang Xi Shi Wen-Pu Lai Jialiang Zhou Hongwei Ye Ya-Jing Zhang Chen-Yan Yin Da-Chuan 《Environmental Chemistry Letters》2022,20(1):81-90
Environmental Chemistry Letters - Global water pollution by organic dyes and metals may be solved by adsorption. In particular, hydrogel adsorbents display unique... 相似文献
327.
Shengqi Zhang Chengsong Ye Wenjun Zhao Lili An Xin Yu Lei Zhang Hongjie Sun Mingbao Feng 《Frontiers of Environmental Science & Engineering》2022,16(7):93
328.
Zhao Dianjia Ye Wenkang Cui Wenxuan 《Environmental science and pollution research international》2022,29(20):29613-29623
Environmental Science and Pollution Research - As eco-friendly adsorption material, hydroxyapatite (Ca5(PO4)3OH, HA) has been extensively applied to the removal of heavy metal ions. However,... 相似文献
329.
Environmental Science and Pollution Research - This study takes the anti-corruption campaign of the 18th CPC National Congress in China as an exogenous impact build a double difference (DID) model,... 相似文献
330.
Cui Zhenxia Zhao Wenai Zhang Yashuai Zhao Naxun Shan Guoyu Yu Xiaoping Ye Xinping 《Environmental science and pollution research international》2022,29(10):14098-14110
Environmental Science and Pollution Research - The use of camera traps is prevalent in the ecological study of giant pandas (Ailuropoda melanoleuca). The reliability of camera-trap surveying... 相似文献