全文获取类型
收费全文 | 253篇 |
免费 | 0篇 |
国内免费 | 4篇 |
专业分类
安全科学 | 15篇 |
废物处理 | 19篇 |
环保管理 | 53篇 |
综合类 | 22篇 |
基础理论 | 52篇 |
污染及防治 | 69篇 |
评价与监测 | 18篇 |
社会与环境 | 9篇 |
出版年
2022年 | 3篇 |
2021年 | 5篇 |
2020年 | 3篇 |
2019年 | 5篇 |
2018年 | 8篇 |
2017年 | 2篇 |
2016年 | 5篇 |
2015年 | 5篇 |
2014年 | 5篇 |
2013年 | 24篇 |
2012年 | 14篇 |
2011年 | 8篇 |
2010年 | 14篇 |
2009年 | 8篇 |
2008年 | 6篇 |
2007年 | 8篇 |
2006年 | 20篇 |
2005年 | 10篇 |
2004年 | 7篇 |
2003年 | 7篇 |
2002年 | 10篇 |
2001年 | 7篇 |
2000年 | 7篇 |
1999年 | 4篇 |
1998年 | 3篇 |
1997年 | 2篇 |
1996年 | 4篇 |
1995年 | 4篇 |
1994年 | 4篇 |
1993年 | 1篇 |
1992年 | 4篇 |
1990年 | 6篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1987年 | 2篇 |
1985年 | 2篇 |
1984年 | 3篇 |
1982年 | 3篇 |
1981年 | 6篇 |
1980年 | 2篇 |
1979年 | 3篇 |
1978年 | 1篇 |
1975年 | 1篇 |
1973年 | 2篇 |
1971年 | 1篇 |
1966年 | 1篇 |
1961年 | 1篇 |
1957年 | 1篇 |
1955年 | 1篇 |
排序方式: 共有257条查询结果,搜索用时 18 毫秒
251.
In this article we compared the response of surface water runoff to a storm event for different rates of urbanization, reforestation
and riparian buffer setbacks across forty subwatersheds of the Muskegon River Watershed located in Michigan, USA. We also
made these comparisons for several forecasted and one historical land use scenarios (over 140 years). Future land use scenarios
to 2040 for forest regrowth, urbanization rates and stream setbacks were developed using the Land Transformation Model (LTM).
Historical land use information, from 1900 at 5-year time step intervals, was created using a Backcast land use change model
configured using artificial neural network and driven by agriculture and housing census information. We show that (1) controlling
the rate of development is the most effective policy option to reduce runoff; (2) establishing setbacks along the mainstem
are not as effective as controlling urban growth; (3) reforestation can abate some of the runoff effects from urban growth
but not all; (4) land use patterns of the 1970s produced the least amount of runoff in most cases in the Muskegon River Watershed
when compared to land use maps from 1900 to 2040; and, (5) future land use patterns here not always lead to increased (worse)
runoff than the past. We found that while ten of the subwatersheds contained futures that were worse than any past land use
configuration, twenty-five (62.5%) of the subwatersheds produced the greatest amount of runoff in 1900, shortly after the
entire watershed was clear-cut. One third (14/40) of the subwatersheds contained the minimum amount of runoff in the 1960s
and 1970s, a period when forest amounts were greatest and urban amounts relatively small. 相似文献
252.
Noel E. Palmer Ray von Wandruszka 《Environmental science and pollution research international》2010,17(7):1362-1370
Purpose
Dissolved humic acids abiotically reduced inorganic arsenic to varying degrees, depending on solution pH, ionic strength, and type of humate used. The functionalities of dissolved organic matter responsible for these redox reactions remained in question, but quinoid moieties undoubtedly played an important role. It is not fully understood whether the quinoids are solely responsible for arsenate reduction, and what the kinetics of the relevant processes are. 相似文献253.
A Study of Physicomechanical and Morphological Properties of Starch/Poly(vinylalcohol) Based Films 总被引:2,自引:0,他引:2
Dipa Ray Papri Roy Suparna Sengupta Siba Prasad Sengupta Amar K. Mohanty Manjusri Misra 《Journal of Polymers and the Environment》2009,17(1):56-63
Starch/Poly(vinylalcohol) blends in two different ratios (60:40 and 50:50) were prepared with glycerol as a plasticizer. Films
were cast by a solution casting method. One set of films were filled with 10 wt% of unmodified bentonite clay and another
set of films were crosslinked with epichlorohydrin in an alkaline medium. The prepared film samples were subjected to X-ray
diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), mechanical characterization and scanning electron microscope
(SEM). Significant changes in the tensile properties were observed depending on the different chemical constituents of the
films. The presence of clay and crosslinking with epichlorohydrin were both found to have considerable effect on the morphology
and mechanical property of the films. The SEM investigations, XRD analysis and FTIR studies revealed the interaction between
the various chemical components of the films. 相似文献
254.
Chemical stress may alter microbiological metabolism and this, in turn, may affect the natural and engineered systems where these organisms function. The impact of chemical stress on microbiological metabolism was investigated using model chemicals 2,4-dinitrophenol (DNP), pentachlorophenol (PCP), and N-ethylmaleimide (NEM). Biological activity of Pseudomonas aeruginosa was measured in batch systems, with and without stressors at sub-lethal concentrations. Stressor DNP, between 49 and 140 mg l(-1), and PCP, at 15 and 38 mg l(-1), caused decreases in biomass growth yields, but did not inhibit substrate utilization rates. These effects increased with stressor concentrations, showing as much as a 10% yield reduction at the highest DNP concentration. This suggests that a portion of carbon and energy resources are diverted from growth and used in stress management and protection. Stressor DNP, between 300 and 700 mg l(-1), and PCP at 85 mg l(-1) caused decreases in growth yields and substrate utilization rates. This suggests an inhibition of both anabolism and catabolism. Stressor NEM was the most potent, inhibiting biological activity at concentrations as low as 2.7 mg l(-1). These findings will ultimately be useful in better monitoring and management of biological treatment operations and contaminated natural systems. 相似文献
255.
Imam Arfin Suman Sunil Kumar Vempatapu Bhanu Prasad Tripathi Deependra Ray Anjan Kanaujia Pankaj K. 《Environmental science and pollution research international》2022,29(29):44135-44147
Environmental Science and Pollution Research - The rapid pace of economic development has resulted in the release of several polycyclic aromatic hydrocarbons (PAHs) into the environment. Microbial... 相似文献
256.
Gogoi Mandakini Mukherjee Indranil Ray Chaudhuri Shaon 《Environmental science and pollution research international》2022,29(41):61838-61855
Environmental Science and Pollution Research - Presence of higher concentration of ammonia (> 0.5 mg/L) as well as nitrite (> 0.2 mg/L) in aquaculture environment create difficulties... 相似文献
257.
Mohanty Trupti Rani Tiwari Nitish Kumar Kumari Suman Ray Archisman Manna Ranjan Kumar Bayen Supriti Roy Shreya Das Gupta Subhadeep Ramteke Mitesh Hiradas Swain Himanshu Sekhar Bhor Manisha Das Basanta Kumar 《Environmental science and pollution research international》2022,29(25):37498-37512
Environmental Science and Pollution Research - Aulacoseira granulata (Ehrenberg) Simonsen 1979 are considered as the eco-variable species which varies in density and diversity along with their... 相似文献