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Articles by Parvez Hassan
Total Records ( 3 ) for Parvez Hassan
  Golam Sadik , M. A. Gafur , M. Shah Alam Bhuiyan , A. H. M. Khurshid Alam , M. Helal U. Biswas , Parvez Hassan , Abdul Mannan , M. Omar Faruk Khan and A. K. A. Chowdhury
  The ethanolic extract of Pergularia daemia and its steroidal fraction were studied for antifertility activity. Both the ethanol extract and the steroidal fraction showed significant antifertility activity in the pre-implantation stage in female mice. The ethanol extract also showed late abortifacient activity
  Luthfunnesa Bari , Parvez Hassan , N. Absar , M.E. Haque , M.I.I.E. Khuda , M.M. Pervin , Shahanaz Khatun and M.I. Hossain
  Two varieties, Local-1 and Local-2 of papaya (Carica papaya L.) were analyzed at four maturity stages (green, mature, ripen and rotten) to obtain a comparative information on their nutritional parameters such as pH, moisture, ash, TTA protein, lipid, carbohydrate, free sugar, reducing sugar, carotene, riboflavin, thiamin, ascorbic acid, calcium, sodium, magnesium, potassium, iron and phosphorus content. The nutrient composition of papaya flesh was found to vary at different maturation stage. The pH, moisture content increases gradually with advancement of maturity in healthy papaya but decreases at rotten stage. The ash, TTA and fiber content was found to be maximum in mature stages and gradually deceases from ripen stage to rotten stage. The results on carbohydrate shown that ripe papaya is a good source of carbohydrate (23.5±0.04 g %) but the content decreases in rotten stage. The concentration of protein, lipid, riboflavin and thiamine are extremely low in ripe papaya. The free sugar, reducing sugar and starch content gradually increases up to ripen stage but decreases at rotten stage. Ripe papaya is a very rich source of vitamin A and vitamin C but their concentrations decrease abruptly at rotten stage. The minerals such as calcium, sodium, magnesium, potassium and phosphorus content of papaya flesh gradually increases with the advancement of maturity whereas the increasing level of iron declines at ripen stages.
  Asif H. Chowdhuryi , Parvez Hassan , M. Asik Mosaddik , Shah Alam Bhuyan , M. Habur Rahman , Ananda K. Saha and Monzur Hossain
  Two microorganisms, which utilize phenol as a sole source of carbon and energy, were isolated from an enrichment culture. The microorganisms were identified as Pseudomonas sp. and Staphylococcus sp. The bacterial strains were found to harbor three endogenous plasmids. Two of the plasmids were lost when the microorganisms were treated with ethidium bromide. Loss of the plasmids in the organisms were correlated with the loss of the ability to metabolize phenol. Phenotypic testing of the wild type and cured strains revealed that the gene(s) responsible for phenol degradation may reside upon the plasmids.
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