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Articles by M. Shariat
Total Records ( 3 ) for M. Shariat
  M. Afkhami , M. Shariat , N. Jaafarzadeh , H. Ghadiri and R. Nabizadeh
  The Karun and Dez rivers basin are the largest rivers basin in Iran which are situated in the south west of the country. Karun River originates from Zagros mountain ranges and passing through Khuzestan plain, reaches the Persian Gulf. Several cities lie along its path of them the most important is Ahvaz, the center of Khuzestan province. To achieve water quality goals in Karun and Dez rivers, a water quality management model has been developed through the GIS approach and a mathematical water quality model. In Karun and Dez rivers, water quality has decreased due to heavy pollution loads from Khuzestan province cities and surrounding areas. In this survey, pollution sources, land use, geographic features and measured water quality data of the river basin were incorporated into the Arc-view geographic information system database. With the database, the model calculated management type and cost for each management project in the river basin. Until now, river management policy for polluted rivers in Iran has been first of all to get penalties from pollution sources and secondarily, to construct treatment plants for the pollution sources whose wastewater is released untreated and for which the wastewater quality goal of the Iranian Department of the Environment is not met. Different management projects with a time program were proposed and they were compared with the results of the river quality without any management approach. It became clear that the results based on the management approach were much better than those for the unmanaged condition from the viewpoint of the achievement of water quality goals and cost optimization.
  M. Cheraghi , N. Khorasani , M. Karami , M. Shariat and B. Riazi
  The main object of this research is to define the real status of the 4 category (the protected areas) in Iran compared with IUCN categorized system. So, the protected area of Maracan with an extension of 103983 hectares situated in the northwest of the country was selected as a case study. The methodology is as soon as the ecological and socio-economical resources which led to the supplement of the resources base map (scale:1.50000) were identified the mapping and zoning processes founded on an analytical system resulted in the grasp of the environmental unit. At the final stage, the zoning model was ascertained. This study intends to find out whether the protected of Maracan matches with one of 4, 5 and 6 categories of IUCN or not. Its consequences indicated that the protected, the recovery, the buffer, the intensive and other zones in Maracan have allocated 52, 8.27, 11.35, 1 and 27% of the plane region to themselves coming one after the other. At the end, the research is suggestive of the 4 category management to protected area of Maracan and the Environmental Conservation Organization of Iran must conform all of protected areas to IUCN categorized system with mentioned methodology.
  S. Nasseri , M. Mazaheri Assadi , M. Noori Sepehr , Kh. Rostami , M. Shariat and K. Nadafi
  In tannery industries, Cr+3 is used for tanning animal hides. Three valence chromium reacts in specific conditions with existing organic compounds and manganese ions to change to hexavalent chromium which is considered hazardous for human health. Aspergillus oryzae grew in different dilutions (10-90%) of tanning house effluent (concentration of Cr+3 =120-1080 mg/L). The maximum chromium removal rate, (48.2%), was observed at pH= 3.3, Cr+3 concentration=240 mg/L and size of inoculum=0.12% (dry weight). Effects of various factors such as pH, temperature, shaking velocity and nutrients were also investigated. At optimum conditions (pH=5; temperature=30oC, shaking velocity= 150 rpm and nitrogen source of dihydrogen ammonium phosphate concentration=0.3%), biomass growth and chromium removal rate were found to be 0.45% of dry weight and 99.8%, respectively. Statistical studies on factors such as pH, temperature, shaking velocity, type and concentration of nutrients on the "biomass growth" and "residual chromium", showed that all the factors had significant effects.
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