Academic Journals Database
Disseminating quality controlled scientific knowledge

Production of dextran by newly isolated strains of Leuconostoc mesenteroides through batch fermentation, [Yeni ayrıştırılmış Leuconostoc mesenteroid PCSIR-4 ve PCSIR-9 suşlarında dextran üretimi]

Author(s): Shah Ali UL Qader | Lubna Iqbal | Afsheen Aman | Erum Shireen | Abid Azhar

Journal: Türk Biyokimya Dergisi
ISSN 0250-4685

Volume: 31;
Issue: 1;
Start page: 21;
Date: 2006;
VIEW PDF   PDF DOWNLOAD PDF   Download PDF Original page

Keywords: dextran | polysaccharide | Leuconostoc mesenteroides

Different isolated strains of Leuconostoc mesenteroides produce dextran compared with that of L. mesenteroides NRRL B-512 F. Among nine newly isolated strains, strains PCSIR-4 and PCSIR-9 produced dextran of different quality. Using these two newly isolated strains, the development of dextran coincided closely with the disappearance of sucrose. The yield of dextran increased during growth and maximum yield was obtained at the end of exponential phase. Dextran yield was higher in media containing nitrogen source supplemented with different salts. Medium 2 was found to be best for the dextran production as compared with other media. Initial sucrose concentration in the media plays an important role in dextran production. The higher the initial concentration of sucrose in the medium, the higher is the yield of dextran produced per unit volume; however, the percentage conversion of sucrose into dextran decreases after reaching maxima. A 10% sucrose concentration in the medium was the optimal level of dextran production. Molecular mass distribution of dextran from PCSIR-4 is near to 2 million Dalton whereas the dextran produced by PCSIR-9 is quiet higher than the dextran from PCSIR-4.
Save time & money - Smart Internet Solutions      Why do you need a reservation system?