全文获取类型
收费全文 | 1690篇 |
免费 | 17篇 |
国内免费 | 43篇 |
专业分类
安全科学 | 24篇 |
废物处理 | 116篇 |
环保管理 | 172篇 |
综合类 | 144篇 |
基础理论 | 300篇 |
环境理论 | 2篇 |
污染及防治 | 566篇 |
评价与监测 | 313篇 |
社会与环境 | 107篇 |
灾害及防治 | 6篇 |
出版年
2023年 | 60篇 |
2022年 | 175篇 |
2021年 | 119篇 |
2020年 | 27篇 |
2019年 | 46篇 |
2018年 | 85篇 |
2017年 | 91篇 |
2016年 | 111篇 |
2015年 | 46篇 |
2014年 | 89篇 |
2013年 | 185篇 |
2012年 | 80篇 |
2011年 | 95篇 |
2010年 | 71篇 |
2009年 | 61篇 |
2008年 | 74篇 |
2007年 | 57篇 |
2006年 | 66篇 |
2005年 | 37篇 |
2004年 | 26篇 |
2003年 | 22篇 |
2002年 | 30篇 |
2001年 | 8篇 |
2000年 | 8篇 |
1999年 | 6篇 |
1998年 | 3篇 |
1997年 | 2篇 |
1996年 | 6篇 |
1995年 | 4篇 |
1994年 | 4篇 |
1993年 | 3篇 |
1992年 | 3篇 |
1989年 | 2篇 |
1988年 | 3篇 |
1985年 | 2篇 |
1984年 | 2篇 |
1983年 | 4篇 |
1982年 | 5篇 |
1979年 | 2篇 |
1969年 | 1篇 |
1966年 | 1篇 |
1965年 | 2篇 |
1964年 | 2篇 |
1962年 | 2篇 |
1961年 | 4篇 |
1958年 | 3篇 |
1957年 | 3篇 |
1956年 | 2篇 |
1955年 | 4篇 |
1953年 | 1篇 |
排序方式: 共有1750条查询结果,搜索用时 15 毫秒
51.
Pal Kalyanbrata Rakshit Subham Mondal Keshab Chandra Halder Suman Kumar 《Environmental science and pollution research international》2021,28(42):58915-58928
Environmental Science and Pollution Research - Crustacean shell waste disposal is considered as biggest problem in seafood processing centers. Incineration and landfilling are the commonest ways of... 相似文献
52.
Golder Animes Kumar Chauhan Soma Ravi Ravi 《Environmental science and pollution research international》2021,28(42):58945-58957
Environmental Science and Pollution Research - High industrialization and improved medical facilities are deteriorating aquatic bodies through untreated effluents. This study is aimed to design and... 相似文献
53.
Sharma Neelam Zahoor Ishrat Sachdeva Monika Subramaniyan Vetriselvan Fuloria Shivkanya Fuloria Neeraj Kumar Naved Tanveer Bhatia Saurabh Al-Harrasi Ahmed Aleya Lotfi Bungau Simona Behl Tapan Singh Sukhbir 《Environmental science and pollution research international》2021,28(43):60459-60476
Environmental Science and Pollution Research - Meningitis is an inflammation of the protective membranes called meninges and fluid adjacent the brain and spinal cord. The inflammatory progression... 相似文献
54.
Kumar Chandan Rana Kunj Bihari Verma Priyanka Mahar Meghna Sharma Shyam Sundar 《Environmental science and pollution research international》2021,28(4):3960-3971
Environmental Science and Pollution Research - Diesel engines are playing a vital responsibility in the field of automobile, agriculture, construction, and power generation. In the present world,... 相似文献
55.
Organic matters (OMs) and their oxidization products often influence the fate and transport of heavy metals in the subsurface aqueous systems through interaction with the mineral surfaces. This study investigates the ethanol (EtOH)-mediated As(III) adsorption onto Zn-loaded pinecone (PC) biochar through batch experiments conducted under Box–Behnken design. The effect of EtOH on As(III) adsorption mechanism was quantitatively elucidated by fitting the experimental data using artificial neural network and quadratic modeling approaches. The quadratic model could describe the limiting nature of EtOH and pH on As(III) adsorption, whereas neural network revealed the stronger influence of EtOH (64.5%) followed by pH (20.75%) and As(III) concentration (14.75%) on the adsorption phenomena. Besides, the interaction among process variables indicated that EtOH enhances As(III) adsorption over a pH range of 2 to 7, possibly due to facilitation of ligand–metal(Zn) binding complexation mechanism. Eventually, hybrid response surface model–genetic algorithm (RSM–GA) approach predicted a better optimal solution than RSM, i.e., the adsorptive removal of As(III) (10.47 μg/g) is facilitated at 30.22 mg C/L of EtOH with initial As(III) concentration of 196.77 μg/L at pH 5.8. The implication of this investigation might help in understanding the application of biochar for removal of various As(III) species in the presence of OM. 相似文献
56.
Jagmohan Sharma Sujata Upgupta Rajesh Kumar Rajiv Kumar Chaturvedi G. Bala N H Ravindranath 《Mitigation and Adaptation Strategies for Global Change》2017,22(1):29-44
Assessment of vulnerability is an important step in building long-term resilience in the forestry sector. The objective of this paper is to present a methodological approach to assess inherent vulnerability of forests at landscape level. The approach involves use of vulnerability indicators, the pairwise comparison method, and geographic information system (GIS) tools. We apply this approach to assess the inherent vulnerability of forests of the Western Ghats Karnataka (WGK) landscape, which is a part of the Western Ghats biodiversity hotspot in India. Four vulnerability indicators, namely biological richness, disturbance index, canopy cover, and slope, are selected. We find that forests in 30, 36, 19, and 15 % grid points in this region show low, medium, high, and very high inherent vulnerability, respectively. The forest showing high and very high inherent vulnerability are mostly dry deciduous forests and plantations located largely on the eastern side of the landscape. We also find that canopy cover is one of the key indicators that determine the inherent vulnerability of forests, and natural forests are inherently less vulnerable than man-made plantations. Spatial assessment of inherent vulnerability of forests at landscape level is particularly useful for developing strategies to build resilience to current stressors and climate change in future. 相似文献
57.
Rakesh Kumar Pathak A. Ravi Kumar G.K. Ananthasuresh 《Journal of Manufacturing Processes》2013,15(1):108-114
This work demonstrates the feasibility of meso-scale (100 μm to mm) punching of multiple holes of intricate shapes in metals. Analytical modeling, finite element (FE) simulation, and experimentation are used in this work. Two-dimensional FE simulations in ABAQUS were done with an assumed material modeling and plane-strain condition. A known analytical model was used and compared with the ABAQUS simulation results to understand the effects of clearance between the punch and the die. FE simulation in ABAQUS was done for different clearances and corner radii of the punch, die, and holder. To complement modeling with real experiments and for the purpose of comparison, a set of punches and dies were made to punch out a miniature spring-steel gripper. Comparison of compliant grippers made by wire-cut electro discharge machining (EDM) and punching shows that realizing sharp interior and re-entrant corners by punching is not easy to achieve. However, the promise of realizing meso-scale parts with complicated shapes through punching is demonstrated in this work; and further work is identified and some strategies are suggested for improvement. The main contribution of this paper is in adapting the well-established punching and blanking operations to the meso-scale as a viable alternative to making miniature devices currently dominated by lithography-based techniques. 相似文献
58.
Kumar V Rani S Malik S Trivedi AK Schwabl I Helm B Gwinner E 《Die Naturwissenschaften》2007,94(8):693-696
Daytime light intensity can affect the photoperiodic regulation of the reproductive cycle in birds. The actual way by which
light intensity information is transduced is, however, unknown. We postulate that transduction of the light intensity information
is mediated by changes in the pattern of melatonin secretion. This study, therefore, investigated the effects of high and
low daytime light intensities on the daily melatonin rhythm of Afro-tropical stonechats (Saxicola torquata axillaris) in which seasonal changes in daytime light intensity act as a zeitgeber of the circannual rhythms controlling annual reproduction
and molt. Stonechats were subjected to light conditions simulated as closely as possible to native conditions near the equator.
Photoperiod was held constant at 12.25 h of light and 11.75 h of darkness per day. At intervals of 2.5 to 3.5 weeks, daytime
light intensity was changed from bright (12,000 lux at one and 2,000 lux at the other perch) to dim (1,600 lux at one and
250 lux at the other perch) and back to the original bright light. Daily plasma melatonin profiles showed that they were linked
with changes in daytime light intensity: Nighttime peak and total nocturnal levels were altered when transitions between light
conditions were made, and these changes were significant when light intensity was changed from dim to bright. We suggest that
daytime light intensity could affect seasonal timing via changes in melatonin profiles.
Professor Dr. E. Gwinner died on 07 September 2004. 相似文献
59.
Sarkar Sayantan Datta Deepshikha Deepak K. S. Mondal Bikash Kumar Das Bimal 《Journal of Material Cycles and Waste Management》2023,25(4):1935-1965
Journal of Material Cycles and Waste Management - Waste lubricating oil is considered to be a hazardous waste and has tremendous impact on human health and environment. The present review... 相似文献
60.
Agrawal Yash Gupta Trilok Siddique Salman Sharma Ravi Kumar 《Journal of Material Cycles and Waste Management》2023,25(1):518-534
Journal of Material Cycles and Waste Management - Dolomite production waste is a by-product generated by dolomite mining, causing environmental pollution and other associated issues worldwide. In... 相似文献