全文获取类型
收费全文 | 168篇 |
免费 | 1篇 |
国内免费 | 4篇 |
专业分类
安全科学 | 6篇 |
废物处理 | 14篇 |
环保管理 | 24篇 |
综合类 | 11篇 |
基础理论 | 24篇 |
污染及防治 | 59篇 |
评价与监测 | 26篇 |
社会与环境 | 8篇 |
灾害及防治 | 1篇 |
出版年
2023年 | 4篇 |
2022年 | 16篇 |
2021年 | 9篇 |
2020年 | 2篇 |
2019年 | 4篇 |
2018年 | 7篇 |
2017年 | 6篇 |
2016年 | 8篇 |
2015年 | 5篇 |
2014年 | 4篇 |
2013年 | 19篇 |
2012年 | 6篇 |
2011年 | 9篇 |
2010年 | 7篇 |
2009年 | 10篇 |
2008年 | 14篇 |
2007年 | 5篇 |
2006年 | 6篇 |
2005年 | 2篇 |
2004年 | 4篇 |
2003年 | 2篇 |
2002年 | 4篇 |
1992年 | 1篇 |
1990年 | 1篇 |
1989年 | 2篇 |
1988年 | 2篇 |
1987年 | 1篇 |
1986年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1980年 | 1篇 |
1978年 | 1篇 |
1975年 | 4篇 |
1974年 | 2篇 |
1973年 | 1篇 |
1966年 | 1篇 |
排序方式: 共有173条查询结果,搜索用时 31 毫秒
111.
Md. Imran H. Khan Hasan M. M. Afroz M. A. Karim 《International Journal of Green Energy》2017,14(4):379-384
Temperature fluctuation inside the cabinet of a household refrigerator significantly affects the quality of preserved food. Phase change material (PCM) is a latent heat storage system that can store and release the heat energy by changing its phase from liquid to solid and solid to liquid respectively. Therefore, use of PCM inside the refrigerator cabinet has the potential for minimizing the temperature fluctuation during the door opening and the power failure. However, very few studies in the literature were dedicated to investigating the role of PCM to reduce the temperature fluctuation. The aim of this work is to experimentally investigate the effects of PCM on temperature fluctuation inside the cabinet of a household refrigerator during the door opening and power failure. The results found that a significantly lower temperature fluctuation can be obtained using PCM. It was found that during the door opening condition the air temperature in the cabinet rose rapidly. However, when a PCM container was used, temperature variation was reduced to 3–5°C. During the power failure, the system with PCM maintained a lower temperature inside the storage chamber for a long period of time (about 2 hours). Moreover, the test results indicate that PCM maintains more stable temperature in the foodstuffs inside the refrigerator. This reduction of temperature fluctuation ultimately improves the quality of preserved food. 相似文献
112.
Murat Cengiz Isil Akmehmet Balcioglu Hasan Huseyin Oruc Tulin Gunduz Cengiz 《Journal of environmental science and health. Part. B》2013,48(3):183-189
The aim of this study was to investigate the occurrence of tetracycline and sulfonamide antibiotics in 13 different soil samples collected from agricultural fields. As well as the antibiotic analysis 18 different physicochemical properties of the soil samples were determined in order to establish a relationship between the recovery rates of antibiotics from the samples and the characteristics of the samples that provide critical information for the reliability of an applied antibiotic analysis method. While the concentrations of tetracyclines were 0.025–0.105 mg kg?1 sulfonamide antibiotics were not detected in any investigated soil samples. The mean recovery rates of tetracyclines and sulfonamides were 84.57 ± 14.92% and 65.88 ± 8.56%, respectively. Although, the organic carbon contents and cation exchange capacities of the soil samples exhibited a great variation the results of multivariate statistical analysis indicated that the metal content of soils was the major factor significantly influenced the recovery rates of the antibiotics. The sulfonamide recovery rates were positively influenced by the calcium and magnesium amounts in the soil samples, whereas tetracycline recovery rates were markedly diminished by increasing the amount of these polyvalent metals. 相似文献
113.
P.G. Deo S.B. Hasan S.K. Majumder 《Journal of environmental science and health. Part. B》2013,48(6):691-701
Abstract Studies on the transformations of hexachlorocyclohexane isomers, α‐, β‐, γ‐ and δ‐, in aqueous solution were carried out at 25 ± 1°C over a period of four weeks. Gas liquid chromatographic technique was used for analysis. The results indicated a loss as well as interconversion of all the four isomers with time. The resulting changes in toxicity of the aqueous solution were studied against Drosophila using topical application. Toxicity studies with aqueous solution of technical hexachlorocyclohexane were simultaneously carried out for comparison. Toxicity of the aqueous solutions of α‐, β‐, and δ ‐isomers showed an increase while that of the γ‐isomer decreased significantly during the four week experimental period. Aqueous solution of technical HCH was equally toxic as that of the γ‐isomer initially and did not show much decrease in its toxicity at the end. Changes in toxicity of the individual isomer solutions were considered to be due, in part, to interconversions of HCH isomers. 相似文献
114.
Bal R Türk G Tuzcu M Yilmaz O Kuloglu T Gundogdu R Gür S Agca A Ulas M Cambay Z Tuzcu Z Gencoglu H Guvenc M Ozsahin AD Kocaman N Aslan A Etem E 《Journal of environmental science and health. Part. B》2012,47(5):434-444
In the current study it was aimed to investigate the toxicity of low doses of imidacloprid (IMI) on the reproductive organ systems of adult male rats. The treatment groups received 0.5 (IMI-0.5), 2 (IMI-2) or 8 mg IMI/kg body weight by oral gavage (IMI-8) for three months. The deterioration in sperm motility in IMI-8 group and epidydimal sperm concentration in IMI-2 and IMI-8 groups and abnormality in sperm morphology in IMI-8 were significant. The levels of testosterone (T) and GSH decreased significantly in group IMI-8 compared to the control group. Upon treatment with IMI, apoptotic index increased significantly only in germ cells of the seminiferous tubules of IMI-8 group when compared to control. Fragmentation was striking in the seminal DNA from the IMI-8 group, but it was much less obvious in the IMI-2 one. IMI exposure resulted in elevation of all fatty acids analyzed, but the increases were significant only in stearic, oleic, linoleic and arachidonic acids. The ratios of 20:4/20:3 and 20:4/18:2 were decreased and 16:1n-9/16:0 ratio was increased. In conclusion, the present animal experiments revealed that the treatment with IMI at NOAEL dose-levels caused deterioration in sperm parameters, decreased T level, increased apoptosis of germ cells, seminal DNA fragmentation, the depletion of antioxidants and change in disturbance of fatty acid composition. All these changes indicate the suppression of testicular function. 相似文献
115.
116.
Islam MR Joardder MU Hasan SM Takai K Haniu H 《Waste management (New York, N.Y.)》2011,31(9-10):2142-2149
In this study on the basis of lab data and available resources in Bangladesh, feasibility study has been carried out for pyrolysis process converting solid tire wastes into pyrolysis oils, solid char and gases. The process considered for detailed analysis was fixed-bed fire-tube heating pyrolysis reactor system. The comparative techno-economic assessment was carried out in US$ for three different sizes plants: medium commercial scale (144 tons/day), small commercial scale (36 tons/day), pilot scale (3.6 tons/day). The assessment showed that medium commercial scale plant was economically feasible, with the lowest unit production cost than small commercial and pilot scale plants for the production of crude pyrolysis oil that could be used as boiler fuel oil and for the production of upgraded liquid-products. 相似文献
117.
Ozgünay H Colak S Zengin G Sari O Sarikahya H Yüceer L 《Waste management (New York, N.Y.)》2007,27(12):1897-1901
The possible use of pre-fleshing wastes from tanneries in the production of biodiesel fuel was examimed in our previous study in 2005. In this study, engine performance and emission values of biodiesel obtained from these wastes have been investigated and compared to petrodiesel fuel. The test results demonstrated that although the wheel force and power of biodiesel fuel is slightly lower than petrodiesel and the acceleration periods are accordingly longer, the emission values of hydrocarbons and particulate matter were found to be considerably lower with biodiesel. Thus, it has been shown that a waste byproduct can be utilized in the production of an environmentally friendly fuel, which can be used in some diesel engines without a need for major adjustment, providing economic and ecological benefits. 相似文献
118.
Islam Muhammad Saiful Hasan Md. Rashed Islam Zahidul 《Environmental science and pollution research international》2023,30(8):19994-20005
Environmental Science and Pollution Research - Microplastics (MPs), together with microfibers, have emerged as a contaminant of concern all around the globe. MPs have been detected in freshwater,... 相似文献
119.
Hanan A. Al-Ashaal Maha A. Fahmy Farouk R. Melek Nagwa H. Aly Zenab M. Hasan 《毒物与环境化学》2013,95(5):965-986
Aim of this study is to evaluate the protective role of Glycine max L. (soybean) against aluminum sulfate-induced genotoxicity. A diet containing 30% soybean and extracts obtained with various organic solvents were administered orally to male white Swiss mice prior to intraperitoneal injection of Al2(SO4)3. Light microscopy was used for the examination of genotoxicity involving somatic cells, germ cells, and sperms. The main secondary metabolites contained in each extract were isolated and identified by chromatographic and spectral analyses. Administration of soy diet and extracts to the examined mice induced significant anti-mutagenic activity against bone marrow aberrations and spermatocyte and sperm abnormalities. At the end of this study, maximum protection was achieved using the methanolic extract (83% and 79%) followed by those obtained with chloroform (71% and 49%) and n-hexane (51% and 39%) for bone marrow aberrations and spermatocyte abnormalities, respectively. The observed activity of soybean extracts might be related to the main constituents isolated and identified. These main constituents were the isoflavone glycosides genistin and daidzin in addition to saponins (methanol extract), lignan matairesinol (chloroform extract), and β-sitosterol, unsaturated fatty acids as well as phospholipids (n-hexane extract). The results illustrated that soy extracts can be considered as alternative anti-mutagenic nutraceuticals and promising source for developing anti-mutagenic drugs. 相似文献
120.
Zinc borate is used as flame retardant for plastics and cellulose fibers, paper, rubber, and textiles. Despite its wide industrial use, there is limited information concerning its toxicity. The aim of the present study was to investigate the concentration dependence (0–280 mg L?1) of its genotoxic activity on cultured human lymphocytes by using sister chromatid exchange and chromosomal aberration assays. Total antioxidant capacity and the extent of oxidative stress were also determined. Zinc borate was found to be non-genotoxic at all tested concentrations. It exhibited antioxidant activity at concentrations lower than 40 mg L?1, and total oxidative stress levels were not changed at any applied concentration of zinc borate. 相似文献