Asian Science Citation Index is committed to provide an authoritative, trusted and significant information by the coverage of the most important and influential journals to meet the needs of the global scientific community.  
ASCI Database
308-Lasani Town,
Sargodha Road,
Faisalabad, Pakistan
Fax: +92-41-8815544
Contact Via Web
Suggest a Journal
 
Articles by Gholamreza Dehghan-Noudeh
Total Records ( 2 ) for Gholamreza Dehghan-Noudeh
  Gholamreza Dehghan-Noudeh , Mohammad Hasan Moshafi , Effat c Behravan , Saeed Torkzadeh and Masoud Ahmadi Afzadi
  Problem statement: The chemical surfactants have some disadvantages; especially, toxicity and no biodegradability. Approach: Biosurfactants were the structurally diverse group of surface-active molecules synthesize by micro-organisms. The microbial surfactants were interesting, because of the biodegradable and have many applications in industry, agriculture, medicine. Results: In the present study, the production of biosurfactant by three strains of Pseudomonas aeruginosa (PTCC 1074, 1310 and 1430) was investigated. The hemolytic and foam forming activity of different strains were studied and consequently, P. aeruginosa PTCC 1074 was selected as the suitable strain. P. aeruginosa PTCC 1074 was grown in the nutrient broth medium and biosurfactant production was evaluated every 24 h by emulsification index and surface tension for the best of production time. After that, in order to get maximum production of biosurfactant, the selected strain was grown with different additives in nutrient broth and the best culture medium was found. The biosurfactant was isolated from the supernatant and its amphipathic structure was confirmed by chemical methods. Conclusion: Biosurfactant produced by Pseudomonas aeruginosa PTCC 1074 would be considered as a suitable surfactant in industries due to its low toxicity.
  Mandana Ohadi , Bagher Amir-Heidari , Mohammad Hassan Moshafi , Ali Mirparizi , Mohammadzaman Basir and Gholamreza Dehghan-Noudeh
  In the present study, biosurfactant production by immobilized Bacillus licheniformis PTCC 1320 in alginate beads has been studied. Alginate solution and bacterial suspension were mixed and stirred to get a uniform mixture. The slurry was taken into a sterile syringe and added drop wise into a stirring calcium chloride solution from a 5 cm height to form spherical beads. The beads were kept under agitation for about 2 h to harden and were then washed. Equal numbers of beads were charged to 250 mL erlenmeyer flasks each containing 50 mL of nutrient broth medium. Beads containing B. licheniformis placed in the nutrient broth medium were incubated in a shaker incubator at 30°C. Samples were collected at 24 h intervals and the parameters of biosurfactant production, such as surface tension, emulsification activity and foam production were studied. Results showed that B. licheniformis entrapped in calcium alginate beads is able to preserve its viability and produce biosurfactant as a secondary metabolite. Maximum biosurfactant production was achieved during the first 24 h.
 
 
 
Copyright   |   Desclaimer   |    Privacy Policy   |   Browsers   |   Accessibility