全文获取类型
收费全文 | 6305篇 |
免费 | 481篇 |
国内免费 | 2113篇 |
专业分类
安全科学 | 581篇 |
废物处理 | 303篇 |
环保管理 | 542篇 |
综合类 | 3660篇 |
基础理论 | 1028篇 |
环境理论 | 2篇 |
污染及防治 | 1880篇 |
评价与监测 | 311篇 |
社会与环境 | 299篇 |
灾害及防治 | 293篇 |
出版年
2024年 | 9篇 |
2023年 | 122篇 |
2022年 | 356篇 |
2021年 | 301篇 |
2020年 | 274篇 |
2019年 | 214篇 |
2018年 | 267篇 |
2017年 | 294篇 |
2016年 | 294篇 |
2015年 | 365篇 |
2014年 | 487篇 |
2013年 | 595篇 |
2012年 | 554篇 |
2011年 | 568篇 |
2010年 | 422篇 |
2009年 | 446篇 |
2008年 | 460篇 |
2007年 | 415篇 |
2006年 | 368篇 |
2005年 | 272篇 |
2004年 | 192篇 |
2003年 | 219篇 |
2002年 | 184篇 |
2001年 | 160篇 |
2000年 | 166篇 |
1999年 | 157篇 |
1998年 | 166篇 |
1997年 | 108篇 |
1996年 | 101篇 |
1995年 | 83篇 |
1994年 | 66篇 |
1993年 | 60篇 |
1992年 | 55篇 |
1991年 | 19篇 |
1990年 | 19篇 |
1989年 | 13篇 |
1988年 | 12篇 |
1987年 | 5篇 |
1986年 | 7篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1983年 | 2篇 |
1982年 | 2篇 |
1981年 | 7篇 |
1979年 | 2篇 |
1977年 | 2篇 |
1975年 | 1篇 |
1974年 | 1篇 |
1972年 | 1篇 |
1971年 | 2篇 |
排序方式: 共有8899条查询结果,搜索用时 15 毫秒
1.
Huang Ying Jiang Qiongji Yu Xubiao Gan Huihui Zhu Xia Fan Siyi Su Yan Xu Zhirui He Cunrui 《Environmental science and pollution research international》2021,28(37):51251-51264
Environmental Science and Pollution Research - Trace copper ion (Cu(II)) in water and wastewater can trigger peroxymonosulfate (PMS) activation to oxidize organic compounds, but it only works under... 相似文献
2.
人民日益增长的美好生活需要已然对粮食产出提出更高要求,综合辨析吃饱和吃好理念,运用理论分析、GM模型对耕地保护目标进行数理预判,为面向2035年美丽中国背景下耕地保护与粮食安全战略提供决策依据.结果表明:(1)在理论假设的完全理想状态下,仅解决吃饱需要的耕地数量为1.18亿hm2,实现全面吃好需要的耕地数量为1.43亿hm2,现有的耕地存量还难以满足该需求;兼顾"吃饱+吃好"双重情境下新时期耕地保有量区间为1.25×108~1.38×108hm2.(2)吃饱和吃好作为中国语境下粮食安全的核心问题,是对国民需求、社会发展、耕地资源形成的自组织系统在时空跃迁过程中的整体性把握.(3)从粮食质量需求视角,到2030年我国人口高峰年,耕地需求仍有不足风险.实施最严格的耕地保护制度仍是我国必须坚守的基本国策,确保耕地质量的"纯洁性"将成为耕地保护转型的重要方向. 相似文献
3.
Wang Chunbo Cai Qijia Li Yang Tian Cuicui Wu Xingqiang Huang Yuhong Xiao Bangding 《Environmental science and pollution research international》2021,28(31):42082-42092
Environmental Science and Pollution Research - A mechanical harvesting technology based on coupling flocculation with a rotary drum filter (RDF, 35-μm) was applied to remove cyanobacterial... 相似文献
4.
Siyuan Bi Zhanrui Huang Fanghong Nie Xiaobo Wang Lijun Sun 《Journal of environmental science and health. Part. B》2019,54(5):416-423
T-2 toxin (T-2), one of the naturally occurring mycotoxins, often accumulates in aquatic animals from contaminated feed. Shrimp (n?=?30 per group) were fed with different concentrations (0, 0.5, 1.5, 4.5 and 13.5?mg kg?1) of T-2 for 20?days. Changes in histopathology, fatty acid and water distribution of shrimp muscle were analyzed. Histopathology of shrimp muscle showed dose-dependent marked degenerative and necrotic changes on exposure to dietary T-2. The T-2 significantly (P?<?0.05) affected the muscle fatty acid composition. ∑SFA, ∑MUFA and ∑PUFA initially decreased and then increased slowly in the high-dosed groups. C16:0, C18:1n-9 and C18:2n-6 were the main saturated fatty acid (SFA), monounsaturated fatty acid (MUFA) and polyunsaturated fatty acid (PUFA), respectively. Also, T-2 significantly affected water distribution in shrimp muscle. High doses of T-2 reduced free water content, resulting in a reduction in the water holding capacity and hence changes to the shrimp muscle quality. Collectively, these results illustrated that T-2 significantly affects the fatty acid and water distribution, and also muscle histopathology, all of which would result in a reduction in the quality and nutritional value of shrimp. 相似文献
5.
Yang Huan Yu Haiying Tang Hao Huang Huagang Zhang Xizhou Zheng Zicheng Wang Yongdong Li Tingxuan 《Environmental science and pollution research international》2021,28(31):41736-41745
Environmental Science and Pollution Research - The disparity of tolerance in plants in response to Cd stress is associated with multiple physiological processes. A pot experiment was conducted to... 相似文献
6.
Lang Huang Binshan Mu Xin Yi Shujun Li Qingwen Wang 《Journal of Polymers and the Environment》2018,26(1):48-58
The utilization of the coffee husk fiber (CHF) from the coffee industry as a reinforcing filler in the preparation of a cost-effective thermoplastic based composite was explored in this study. The chemical composition and thermal properties of the CHF were investigated and compared with those of wood fiber (WF). CHF proved to be mainly composed of cellulose, hemicellulose and lignin, and exhibited similar thermal behavior to WF. High density polyethylene (HDPE) composites with CHF loadings of from 40 to 70% were prepared using melt processing and extrusion. The processing properties, mechanical behavior, water absorption and thermal performance of these composites were investigated. The effect of maleated polyethylene (MAPE) used as a coupling agent on the composite was explored. The experimental results showed that increasing the CHF loading in the HDPE matrix resulted in an increase in the modulus and thermal properties of the composites, but resulted in poor water resistance. The addition of a 4% MAPE significantly improved the interfacial behavior of the hydrophilic lignocellulosic fiber and the hydrophobic polymer matrix. 相似文献
7.
Baisheng Nie Xin Huang Fei Xue Jiang Chen Xiaobing Liu Yangyang Meng 《International journal of occupational safety and ergonomics》2018,24(2):268-277
In order to enhance Chinese workers’ occupational safety awareness, it is essential to learn from developed countries’ experiences. This article investigates thoroughly occupational safety and health (OSH) in China and the UK; moreover, the article performs a comparison of Chinese and British OSH training-related laws, regulations and education system. The following conclusions are drawn: China’s work safety continues to improve, but there is still a large gap compared with the UK. In China a relatively complete vocational education and training (VET) system has been established. However, there exist some defects in OSH. In the UK, the employer will not only pay attention to employees’ physiological health, but also to their mental health. The UK’s VET is characterized by classification and grading management, which helps integrate OSH into the whole education system. China can learn from the UK in the development of policies, VET and OSH training. 相似文献
8.
Wenli Feng Zhiqiang Wu Liangliang Huang Yang Ding Ruidan Shi 《Russian Journal of Ecology》2018,49(3):260-267
To evaluate the effect of abiotic factors on larval and juvenile fish assemblage in shallow waters of middle reaches of Li River, Guilin, China. Samplings were taken monthly at 7 stations in the mainstream and 2 stations in 3 tributaries from May 2014 to April 2015. Synchronously, temperature, pH, turbidity, conductivity, dissolved oxygen rainfall and discharge were obtained. In all, 11.886 larval and juvenile fish from 18 species belonging to 8 families, 16 genera was captured. Principal Component Analysis (PCA) showed obvious significant difference between the environmental variables across sampling areas and months. The results of Canonical Correspondence Analysis (CCA) indicated that water temperature, turbidity, discharge and rainfall were dominant factors on larval and juvenile fish assemblage. 相似文献
9.
Huang Shaojian Dai Chunhao Zhou Yaoyu Peng Hui Yi Kexin Qin Pufeng Luo Si Zhang Xiaoshan 《Environmental science and pollution research international》2018,25(17):16548-16566
Environmental Science and Pollution Research - Plant leaves play a key role in the accumulation of PAHs, as they are able to capture PAHs from the air. In this paper, the mechanism, including... 相似文献
10.
He Genhe Wang Xiaodong Liu Xu Xiao Xiaoyu Huang Shoucheng Wu Jichun 《Russian Journal of Ecology》2018,49(6):524-533
Russian Journal of Ecology - The present study characterized the nutrients availability of three rare earth tailings deserted in different time stages in Southern Jiangxi of China, and revealed the... 相似文献