全文获取类型
收费全文 | 341篇 |
免费 | 1篇 |
国内免费 | 4篇 |
专业分类
安全科学 | 30篇 |
废物处理 | 31篇 |
环保管理 | 32篇 |
综合类 | 20篇 |
基础理论 | 47篇 |
环境理论 | 1篇 |
污染及防治 | 106篇 |
评价与监测 | 56篇 |
社会与环境 | 23篇 |
出版年
2023年 | 6篇 |
2022年 | 37篇 |
2021年 | 21篇 |
2020年 | 13篇 |
2019年 | 12篇 |
2018年 | 18篇 |
2017年 | 33篇 |
2016年 | 20篇 |
2015年 | 15篇 |
2014年 | 10篇 |
2013年 | 60篇 |
2012年 | 22篇 |
2011年 | 12篇 |
2010年 | 11篇 |
2009年 | 5篇 |
2008年 | 14篇 |
2007年 | 8篇 |
2006年 | 7篇 |
2005年 | 3篇 |
2004年 | 4篇 |
2003年 | 4篇 |
2002年 | 1篇 |
1998年 | 2篇 |
1997年 | 3篇 |
1995年 | 1篇 |
1993年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1975年 | 1篇 |
排序方式: 共有346条查询结果,搜索用时 578 毫秒
171.
Rasha Abu-Khudir Mahmoud E. Habieb Marwa A. Mohamed Asrar M. Hawas Tarek M. Mohamed 《Environmental science and pollution research international》2017,24(31):24272-24283
Exposure to either lead (Pb) or γ-irradiation (IR) results in oxidative stress in biological systems. Herein, we explored the potential anti-apoptotic effect of spermine (Spm) against lead and/or γ-irradiation-induced hepatotoxicity in male albino rats. Rats were divided into eight experimental groups of ten rats each: groups including negative control, whole body γ-irradiated (6 Gray (Gy)), lead acetate (PbAct) trihydrate orally administered (75 mg/kg bw ≡ 40 mg/kg bw Pb for 14 consecutive days), and Spm intraperitoneally dosed (10 mg/kg bw for 14 consecutive days) rats and groups subjected to combinations of Pb + IR, Spm + IR, Spm + Pb, and Spm + Pb followed by IR on day 14 (Spm + Pb + IR). A significant decrease in arginase activity as well as mRNA and protein levels of Bcl-2 and p21 was observed in rats intoxicated with Pb and/or γ-irradiation compared to controls, whereas Bax mRNA and protein levels were significantly increased. Also, an increased level of nitric oxide (NO) with a reduced arginase activity was observed in liver tissues of intoxicated rats. Spm co-treatment with lead and/or γ-irradiation attenuated the increase in Bax mRNA and protein expression, while it restored those of Bcl-2 and p21 together with NO levels and arginase activity to control values. Altogether, we suggest that Spm may be useful in combating free radical-induced apoptosis in Pb-intoxicated and/or γ-irradiated rats. 相似文献
172.
Khaniabadi Yuef Omidi Fanelli Roberto De Marco Alessandra Daryanoosh Seyed Mohammad Kloog Itai Hopke Philip K. Conti Gea Oliveri Ferrante Margherita Mohammadi Mohammad Javad Babaei Ali Akbar Basiri Hassan Goudarzi Gholamreza 《Environmental science and pollution research international》2017,24(20):16860-16868
Environmental Science and Pollution Research - The main objective of this study was to assess the possible effects of airborne particulate matter less than 10 μm in diameter (PM10)... 相似文献
173.
Edna F. Einsiedel Chaseten Remillard Mahmoud Gomaa Ella Zeaiter 《Environmental Communication: A Journal of Nature and Culture》2017,11(1):41-62
Biofuels are an important component in the suite of renewable energy alternatives but their development trajectory has been fraught with controversy. This study investigated the representation of biofuels in political cartoons on the Internet. Political cartoons have relied on informative, persuasive, and performative attributes to engender critical reflection and mobilize action. We analyzed a corpus of 130 relevant cartoons obtained through Google Images which were then thematically categorized. The problems highlighted in these cartoons focused on the social injustices arising from the diversion of food sources to fuel, the environmental destruction arising from deforestation, the unfulfilled expectations for climate change mitigation, and the policy contradictions that emerged. We suggest that political cartoons’ discursive dimensions allow us to make immediate connections between the image and our cultural stores of meaning, while at the same time further elucidate the dilemmas and contradictions embedded in the public's interface with biofuels as an environmental issue. 相似文献
174.
Statistical source identification of major and trace elements in groundwater downward the tailings dam of Miduk Copper Complex, Kerman, Iran 总被引:2,自引:0,他引:2
Kargar M Khorasani N Karami M Rafiee G Naseh R 《Environmental monitoring and assessment》2012,184(10):6173-6185
Identifying the possible sources of potential harmful metals in groundwater systems plays a crucial role in evaluating the potential risks to residents and local plant cover. An attempt was made to define the origin of Al, Cd, Cu, Fe, Mo, Ni, and Pb in groundwater using multivariate statistic approaches [principal component analysis (PCA), hierarchical cluster analysis], and tailings sequential extraction by the method of Tessier et al. The concentrations of studied elements were measured in 42 samples collected from 15 stations surrounding and downward the tailings dam of Miduk Copper Complex, central province of Kerman, Iran. According to the PCA results, confirmed by cluster dendrogram and metal content measurement of tailings sequential extracts, two components accounting for nearly 73% of the total variance, controlled the heavy metal variability and classified the possible source of groundwater contamination into two categories: (1) upper seepage which controls the variability of Cd, Cu, Fe, Ni, and Pb and (2) toe seepage of tailings dump affecting on Mo and Al concentration in downstream groundwater. 相似文献
175.
Abdulrasoul M. Al-Omran Salem E. El-Maghraby Anwar A. Aly Mohammed I. Al-Wabel Zafer A. Al-Asmari Mahmoud E. Nadeem 《Environmental monitoring and assessment》2013,185(8):6397-6406
This study focuses on the chemical analysis of the available brands of domestic bottled water in Riyadh City, Saudi Arabia. The distribution of the chemical constituents (major, minor, and trace elements) is determined and compared with the chemical content labeled on the bottles and with drinking water standards of Saudi Arabian, World Health Organization, and U.S. Environmental Protection Agency. The obtained results indicated that except for fluoride and bromate, the concentrations of dissolved salts, soluble cations and anions, nitrate, and trace elements of most bottled waters on sale were within the permissible limits set by standards used. On the other hand, the comparison between determined and reported label values recorded a substantial variation in some parameter values. Results indicated that more than 18 % of the sampled bottled waters exceeded the allowable limits for drinking water. Generated Piper diagrams revealed that the majority of investigated waters were sodium chloride–sulfate type; however, the hydrochemical modeling indicated that all water samples were undersaturated for anhydrite, gypsum, and halite. 相似文献
176.
177.
178.
Mahmoud Mohammadyan Mahboobeh Ghoochani Itai Kloog Sabah Ahmed Abdul-Wahab Kaan Yetilmezsoy Behzad Heibati Krystal J. Godri Pollitt 《Environmental monitoring and assessment》2017,189(5):235
The relationship between indoor and outdoor particulate air pollution was investigated at an urban background site on the Payambar Azam Campus of Mazandaran University of Medical Sciences in Sari, Northern Iran. The concentration of particulate matter sized with a diameter less than 1 μm (PM1.0), 2.5 μm (PM2.5), and 10 μm (PM10) was evaluated at 5 outdoor and 12 indoor locations. Indoor sites included classrooms, corridors, and office sites in four university buildings. Outdoor PM concentrations were characterized at five locations around the university campus. Indoor and outdoor PM measurements (1-min resolution) were conducted in parallel during weekday mornings and afternoons. No difference found between indoor PM10 (50.1 ± 32.1 μg/m3) and outdoor PM10 concentrations (46.5 ± 26.0 μg/m3), indoor PM2.5 (22.6 ± 17.4 μg/m3) and outdoor PM2.5 concentration (22.2 ± 15.4 μg/m3), or indoor PM1.0 (14.5 ± 13.4 μg/m3) and outdoor mean PM1.0 concentrations (14.2 ± 12.3 μg/m3). Despite these similar concentrations, no correlations were found between outdoor and indoor PM levels. The present findings are not only of importance for the potential health effects of particulate air pollution on people who spend their daytime over a period of several hours in closed and confined spaces located at a university campus but also can inform regulatory about the improvement of indoor air quality, especially in developing countries. 相似文献
179.
Seyed Majid Zabihzadeh 《Journal of Polymers and the Environment》2011,19(1):133-136
Natural filler/high density polyethylene (HDPE) injection-molded composites of flour from different lignocellulosic sources
were prepared, and their long-term water absorption and thickness swelling were studied. Filler samples from wheat straw,
hybrid Euro-American poplar, and loblolly pine were mixed with the matrix at 35 wt% lignocellulosics content and either zero
or 2% maleic anhydride grafted polyethylene (MAPE) as compatibilizer. Results indicated water absorption of all the composites
followed the kinetics of a Fickian diffusion process. The water diffusion coefficient of the composites was clearly dependent
upon the lignocellulosic type. The wheat straw composites showed the highest and the pine composites exhibited the lowest
water absorption coefficients. The highest thickness swelling took place in the wheat straw composites, followed by the poplar
and pine composites, respectively. Adding MAPE to the composites decreased the water diffusion coefficient and thickness swelling
by improving the adhesion between natural filler and the HDPE. 相似文献
180.
Zeinab Tavasoli Parviz Abdolmaleki Seyed Javad Mowla Faezeh Ghanati Amir Sabet Sarvestani 《The Environmentalist》2009,29(2):220-224
This research was carried out to evaluate the influence of static magnetic field on the rate of apoptosis in bone marrow stem
cells (BMSCs) of rats. Extracted cells were suspended in αMEM as a culture media for 48 h. After that, cells were exposed
to 15 mT static magnetic field (SMF) for 5 h, incessantly with or without FeCl2. The rate of apoptosis was then assessed via flow cytometery. The results showed that either treatment with FeCl2 or exposure to SMF enhanced the rate of apoptotic cells. Moreover, cells that were treated simultaneously with FeCl2 and SMF have higher rate of apoptosis. An increase in apoptosis by 26.5% was induced by SMF alone and an increase in apoptosis
by 28.2% was induced by a combination of FeCl2 and SMF, compared to their corresponding controls. The results recommended that the effects of SMF on apoptosis may be related
to increment of the number of free radicals in the cells. 相似文献