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81.
The protective effect of Spirulina platensis (SP) powder against aluminium-induced nephrotoxicity and DNA damage in rats was studied. Male rats receiving daily 40 mg/kg b.wt. aluminium chloride (AlCl3) orally had increased serum levels of urea and creatinine, up regulated kidney injury molecule-1 and tissue inhibitor of metalloproteinase-1 genes, down regulated catalase and glutathione peroxidase genes, and increased all parameters of kidney DNA damage using comet assay. Treatment with SP alleviated all AlCl3-induced effects of toxicity, especially when the animals were pre-treated. 相似文献
82.
Hassan Hamdy Yousef Mohamed S. Mohamed Sherif A. Abo-Elfadl Saleh 《Environmental science and pollution research international》2021,28(47):66941-66956
Environmental Science and Pollution Research - A study is presented on the enhancement of solar still (SS) performance by using chimney exhaust gases (EGs) passing through chimney channels under... 相似文献
83.
Dina K. N. Dechmann Elisabeth K. V. Kalko Gerald Kerth 《Behavioral ecology and sociobiology》2007,61(8):1219-1228
In polygynous mammals, males are usually responsible for gene flow while females are predominantly philopatric. However, there
is evidence that in a few mammalian species female offspring may disperse to avoid breeding with their father when male tenure
exceeds female age at maturity. We investigated offspring dispersal and local population structure in the Neotropical bat
Lophostoma silvicolum. The mating system of this species is resource defense polygyny, with the resource being active termite nests, excavated
by single males, which are then joined by females. We combined field observations of 14 harems during 3 years and data about
the genetic structure within and between these groups, calculated with one mitochondrial locus and nine nuclear microsatellite
loci. The results show that both male and female offspring disperse before maturity. In addition, we estimated life span of
excavated termite nests and the duration they were occupied by the same male. Our findings suggest that long male tenure of
up to 30 months is indeed a likely cause for the observed dispersal by female offspring that can reach maturity at a low age
of 6 months. We suggest that dispersal by offspring of both sexes may occur quite frequently in polygynous tropical bats and
thus generally may be more common in mammals than previously assumed. 相似文献
84.
Abdel-Rahman FH Clark S Saleh MA 《Journal of environmental science and health. Part. B》2008,43(8):680-685
Thirty-three organic acids and furfural metabolites were examined for their nematicidal activity against plant-parasitic, free-living and predacious nematodes. Propionic acid, 2-methylhexanoic acid, lactic acid, maleic acid, and furic acid were the most effective nematicides among normal chain organic acids, branched organic acids, hydroxy/keto-acids, dicarboxylic acids and furfural metabolites, respectively. Seven of the tested compounds were found to have more than 90% mortality thus designating them as highly active nematicides. Of the highly active tested compounds, an average octanol/water log P of 0.97 was observed with a range from 0.28 to 2.64, and a Henry's Law constant averaging 2.6 x 10(- 7) atm.m3/mole. Tested chemicals with minor or low nematicidal activity showed an average log P of 1.76 with a range from 0.15 to 3.42 and a Henry's Law constant averaging 16.6 x 10(- 7) atm.m3/mole. 相似文献
85.
Occurrence and concentrations of polybrominated diphenyl ethers in sewage sludge from three wastewater treatment plants in Kuwait 总被引:5,自引:0,他引:5
Polybrominated diphenyl ether (PBDE) concentrations were measured in sewage sludge samples collected from three wastewater treatment plants in Kuwait over a six month period. PBDEs were detected in all samples analyzed and there were significant differences between the three wastewater treatment plants. The mean (and range) of summation PBDEs concentrations measured are as follows: Jahra 52.5 ng g(-1) (5.7-169.5 ng g(-1)); Reqqa, 144 ng g(-1) (32-296 ng g(-1)); Umm Haylaman, 377 ng g(-1) (23-1599 ng g(-1)). The differences in concentrations of the sum of penta congeners were consistently different at the three treatment plants with values increasing in the order: Jahra相似文献
86.
E. Osei B. Du A. Bekele L. Hauck A. Saleh A. Tanter 《Journal of the American Water Resources Association》2008,44(3):562-576
Abstract: An integrated economic and environmental modeling system was developed for evaluating agro‐environmental policies and practices implemented on large scales. The modeling system, the Comprehensive Economic and Environmental Optimization Tool‐Macro Modeling System (CEEOT‐MMS), integrates the Farm‐level Economic Model (FEM) and the Agricultural Policy Environmental eXtender (APEX) model, as well as national databases and clustering and aggregation algorithms. Using micro simulations of statistically derived representative farms and subsequent aggregation of farm‐level results, a wide range of agricultural best management practices can be investigated within CEEOT‐MMS. In the present study, CEEOT‐MMS was used to evaluate the economic and water quality impacts of nitrogen (N) and phosphorus (P) based manure application rates when implemented on all animal feeding operations in the State of Texas. Results of the study indicate that edge‐of‐field total P losses can be reduced by about 0.8 kg/ha/year or 14% when manure applications are calibrated to supply all of the recommended crop P requirements from manure total P sources only, when compared to manure applications at the recommended crop N agronomic rate. Corresponding economic impacts are projected to average a US$4,800 annual cost increase per farm. Results are also presented by ecological subregion, farm type, and farm size categories. 相似文献
87.
Abdel Khalik H. El‐Sebae Mohamed M. Abou Zeid Fawzia H. Abdel‐Rahman Mahmoud A. Saleh 《Journal of environmental science and health. Part. B》2013,48(2):303-321
Abstract Human serum transferrin (HSTF), human serum albumin (HSA) and rat serum were compared for their interaction with AlCl3 , in a Tris‐HCl buffer solutions (pH 7.4). The AlCl3 was tested in series of concentrations in the range of 50 μM up to 500 μM . HSTF, HSA and their 1:1 mixture and rat serum were incubated at 37°C with series of AlCl3 concentrations. The protein profile of the incubated solutions were compared to control using SDS‐PAGE and FPLC tests. The results indicated that HSTF was more specifically responsive to AlCl3showing a characteristic increase in its UV absorption, peak and area dimensions. Simultaneously, HSA was less affected, but it showed a significant shift with an increase in molecular weight accompanied with a change in its profile. The respective bands of transferrin and albumin in rat serum behaved similarly. The SDS‐PAGE and FPLC data coincided and confirmed the preferential affinity of HSTF to bind with Al3+ . These results support the suggestion of using HSTF for monitoring levels of Al3+ in human blood samples of exposed population. The importance of further developing such a biomarker is the increased demand for early detection of the hazardous levels of Al3+ in relation to its long term neurotoxic adverse effects. 相似文献
88.
89.
Environmental benefits and economic costs of manure incorporation on dairy waste application fields 总被引:3,自引:0,他引:3
Osei E Gassman PW Hauck LM Jones R Beran L Dyke PT Goss DW Flowers JD McFarland AM Saleh A 《Journal of environmental management》2003,68(1):1-11
Model simulations performed representing dairies in a 93000 ha watershed in north central Texas suggest that manure incorporation results in reduced phosphorus (P) losses at relatively small to moderate cost to producers. Simulated manure incorporation with a tandem disk on fields double-cropped with sorghum/winter wheat resulted in up to 33, 45, and 37% reductions in per hectare sediment-bound, soluble, and total P losses in edge-of-field runoff, relative to simulated surface manure applications. The effects of incorporation were evaluated at three different manure application rates. On aggregate across all three manure application rates, significant declines in P losses were obtained with incorporation except for sediment-bound P losses under the N-based manure application rate scenario.We found that the practice of incorporating manure shortly after it has been broadcast on the soil surface could help reduce P losses in such situations where P-based rates alone prove inadequate. The cost the producer incurs when manure is incorporated is on average about 1% of net returns when manure is applied at the N rate and 2-3% when it is applied at alternative P-based rates. In practice the costs could be lower because producers may substitute the manure incorporation operation for a tandem disk operation performed prior to manure application. As more and more dairy producers switch to the use of sorghum and corn silage in dairy rations and consequent on-farm production of these forages, the practice of manure incorporation may help to reduce phosphorus losses resulting from dairy manure applications to fields with these forage crops. 相似文献
90.
H. H. Saleh 《Marine Biology》1972,12(3):255-260
The length-weight relationship of Tilapia zillii
Gerv., seasonally collected from Lake Mariut (a brackish-water lake), Egypt, has been studied. It was found that mature fishes are fatter than spent individuals, and that this mainly affects the exponent n (W=a L
n). While the females are nearly of equal fatness to the males, a higher value of the exponent n is recorded for the females; this is due to the higher weight of the gonads. The smaller fish are more fecundite than the larger, elder individuals; this is revealed by comparison of the condition factor K and GSI (gonadosomatic index) for ripo and spent fish, respectively. 相似文献