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排序方式: 共有118条查询结果,搜索用时 16 毫秒
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Mostafa Islam Mohamed Nashwa Hashem Mohamed Basant Almeer Rafa Abulmeaty Mahmoud M. A. Bungau Simona G. El-Shazly Assem Mohamed Yahya Galal 《Environmental science and pollution research international》2022,29(18):26775-26791
Environmental Science and Pollution Research - Coronavirus disease 2019 (COVID-19) is a rapidly growing pandemic that requires urgent therapeutic intervention. Finding potential anti COVID-19 drugs... 相似文献
53.
Rahman Md. Ashekur Hossain Md. Yeamin Hossain Mostafa A. R. Ahmed Zoarder Faruque Jaman Ahmed Ohtomi Jun 《Environmental science and pollution research international》2022,29(55):83273-83290
Environmental Science and Pollution Research - Prawns are regarded as delicious food items and a source of income as it is the salient exportable fishery item of Bangladesh and a number of other... 相似文献
54.
Alwaleed Eman A. El-Sheekh Mostafa Abdel-Daim Mohamed M. Saber Hani 《Environmental science and pollution research international》2021,28(2):1801-1811
Environmental Science and Pollution Research - Spirulina platensis (Sp) or Amphora coffeaeformis (Am) are good candidates as an in-feed antibiotic substitute for broilers. This work was performed... 相似文献
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Bioreactor landfills: experimental and field results 总被引:28,自引:0,他引:28
Warith M 《Waste management (New York, N.Y.)》2002,22(1):7-17
Bioreactor landfills allow a more active landfill management that recognizes the biological, chemical and physical processes involved in a landfill environment. This paper presents the results of an experimental study carried out to determine the effect of solid waste size, leachate recirculation and nutrient balance on the rate of municipal solid waste (MSW) biodegradation. Higher rates of MSW biodegradation eventually cause a reduction of the contaminant life span of the landfill and decrease in the cost of long term monitoring. The study indicated that the smaller the size of the MSW the faster the biodegradation rate of the waste. In addition, the paper presents the results of leachate recirculation on solid waste biodegradation in a full-scale landfill site, which is located in Nepean, Ontario, Canada. The leachate was recirculated into the landfilled solid waste for 8 years through infiltration lagoons. Similar results to those obtained in the laboratory scale experiments were noted. The average pH of the leachate in the early stages of recirculation was on the acidic range of the pH scale, however, the pH value was in the range of 7-8 after 2 years of leachate recirculation. The concentration of chloride remained fairly constant at about 1000 mg/l during the leachate recirculation period. A decreasing trend of the organic load, measured as biological oxygen demand and chemical oxygen demand, was observed. Recovery of landfill air space was also noted because of the enhanced subsidence and decomposition of the solid waste. 相似文献
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Mohammed Mahabubur Rahman Jiro Tsukamoto Md. Motiur Rahman Aogu Yoneyama Kamal Mohammad Mostafa 《Chemistry and Ecology》2013,29(6):540-553
Lignin is a major component of plant litter. In this review, we found lignin comprises a complex class of organic compounds whose concentration differs greatly both between and within plant species. There are many analytical methods for detecting the composition and structure of lignins. As lignins are enormously complex compounds, chemical assay is difficult and different methods vary with the results. Lignin plays a significant role in the carbon cycle, sequestering atmospheric carbon into the living tissues of woody perennial vegetation. It has also great effects on nitrogen dynamics of forest ecosystems as well as other ecological processes. Lignin is one of the most slowly decomposing components of dead vegetation, contributing a major fraction of the material that becomes humus as it decomposes. Lignin is highly correlated with decomposition of litter. Thus, there is evidence that the lignin concentration is a more influential factor than the other chemical concentrations, in determining the rate of leaf litter decomposition of different forest ecosystems. Although a great number of researchers have addressed lignin's role in litter decomposition, still there are many aspects of lignin biogeochemistry that are not known. This lack of information hinders complete amalgam of lignin effects on litter decomposition processes and dynamics of nutrient cycling. 相似文献
58.
A variety of statistical techniques has been used in predictive vegetation modelling (PVM) that attempt to predict occurrence of a given community or species in respect to environmental conditions. We compared the performance of three profile models, BIOCLIM, GARP and MAXENT with three nonparametric models of group discrimination techniques, MARS, NPMR and LRT. The two latter models are relatively new statistical techniques that have just entered the field of PVM. We ran all models on a local scale for a given grassland community (Teucrio-Seslerietum) using the same input data to examine their performance. Model accuracy was evaluated both by Cohen’s kappa statistics (κ) and by area under receiver operating characteristics curve based both on resubstitution of training data and on an independent test data set. MAXENT of profile models and MARS of group discrimination techniques achieved the best prediction. 相似文献
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M H Mostafa E A El-Bassiouni S M El-Sewedy S M El-Zoghby M Ramadan G A Abdel-Tawab A H El-Sebae 《Journal of environmental science and health. Part. B》1983,18(3):393-399
The effects of some xenobiotics on the activity of the B6-dependent kynurenine hydrolase (KH) and kynurenine aminotransferase (KATE) in mouse liver, were investigated. Polychlorinated biphenyl (Aroclor 1254) (400mg/kg/day x4) markedly decreased the activity of both enzymes. Benzo(a)pyrene (BP) and 3-methylcholanthrene (3-MC) (40mg/Kg/day x1) as well as phenobarbital (PB) (75mg/kg/day x3) did not alter the activity of KH, while that of KATE was mildy reduced. The response of the two enzymes to treatment with chlorpromazine (CPZ) (5mg/Kg/day x5) were opposite with marked elevation of KH and inhibition of KATE activities. Treatment with B-naphthoflavone (B-NF) (80mg/Kg/day x2), Pyrazole (200mg/Kg/day x1) or indole (400mg/kg/day x1) produce no change in the activity of either enzyme. It, seems therefore, that Aroclor (1254) and chlorpromazine may cause disordered kynurenine metabolism through alterations in the activities of its metabolizing enzymes. This, in turn, might affect nicotinamide adenine dinucleotide biosynthesis and/or the accumulation of some tryptophan metabolites suspected of being carcinogenic or co-carcinogenic. 相似文献
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