Home Articles List Article Information
Journal of Agricultural Chemistry and Biotechnology
Journal Archive
Volume Volume 16 (2025)
Volume Volume 15 (2024)
Volume Volume 14 (2023)
Volume Volume 13 (2022)
Volume Volume 12 (2021)
Volume Volume 11 (2020)
Volume Volume 10 (2019)
Volume Volume 9 (2018)
Volume Volume 8 (2017)
Volume Volume 7 (2016)
Volume Volume 6 (2015)
Volume Volume 5 (2014)
Volume Volume 4 (2013)
Volume Volume 3 (2012)
Volume Volume 2 (2011)
Volume Volume 1 (2010)
Volume Volume 34 (2009)
Volume Volume 33 (2008)
Volume Volume 32 (2007)
Volume Volume 31 (2006)
Volume Volume 30 (2005)
Volume Volume 29 (2004)
Volume Volume 28 (2003)
Volume Volume 27 (2002)
Volume Volume 26 (2001)
Volume Volume 25 (2000)
Abu El Wafa, W., Ahmed, F., Sharaf, M., Saleh, E. (2005). PRODUCTION OF VITAMIN B12 BY SOME LOCAL ISOLATES OF STREPTOMYCETES. Journal of Agricultural Chemistry and Biotechnology, 30(2), 1069-1082. doi: 10.21608/jacb.2005.225271
W. M. Abu El Wafa; F.H. Ahmed; M. S. Sharaf; E. A. Saleh. "PRODUCTION OF VITAMIN B12 BY SOME LOCAL ISOLATES OF STREPTOMYCETES". Journal of Agricultural Chemistry and Biotechnology, 30, 2, 2005, 1069-1082. doi: 10.21608/jacb.2005.225271
Abu El Wafa, W., Ahmed, F., Sharaf, M., Saleh, E. (2005). 'PRODUCTION OF VITAMIN B12 BY SOME LOCAL ISOLATES OF STREPTOMYCETES', Journal of Agricultural Chemistry and Biotechnology, 30(2), pp. 1069-1082. doi: 10.21608/jacb.2005.225271
Abu El Wafa, W., Ahmed, F., Sharaf, M., Saleh, E. PRODUCTION OF VITAMIN B12 BY SOME LOCAL ISOLATES OF STREPTOMYCETES. Journal of Agricultural Chemistry and Biotechnology, 2005; 30(2): 1069-1082. doi: 10.21608/jacb.2005.225271

PRODUCTION OF VITAMIN B12 BY SOME LOCAL ISOLATES OF STREPTOMYCETES

Article 1, Volume 30, Issue 2, February 2005, Page 1069-1082  XML PDF (179.22 K)
Document Type: Original Article
DOI: 10.21608/jacb.2005.225271
View on SCiNiTO View on SCiNiTO
Authors
W. M. Abu El Wafa1; F.H. Ahmed1; M. S. Sharaf2; E. A. Saleh2
1Microbiol. Dept., National Organization for Drug Control and Research, P. 0. Box 29, Cairo, Egypt.
2Agric. Microbiol. Dept., Fac. Agric., Am Shams Univ., P.O. Box 68 Hadayek Shubra 11241, Cairo, Egypt.
Abstract
Out of 103 Egyptian local actinomycete isolates, Streptomyces SW1 was selected for vitamin 812 production. This isolate was completely identified as Streptomyces baamensis. The aim of the present study was to se’ect a cheap agriculturaJ or manufacturai by-product in the modified starch nitrate fermentation medium for higher vitamin 812 production. Results revealed that mo?asses at 15 g L1 , instead of starch in modified starch nitrate medium, proved to be the best by product for vitamin 812 production by the S. baamensis strain SWL Moreover, some environmental factors i.e. incubation period, initial pH value, temperature and shaking rate at different levels were tested for the optimization of fermentation process to yield the highest cyanocobalamin concentration. Results clearly showed that the optimal production of vitamin B12 was reached under submerged culture condition on the modified fermentation medium containing 15 g L1 molasses with initial pH value of 6 and a temperature of 28 oc after 4 days on a rotary shaker at the rate of 200 rpm, being 53.20 pg ml1.
Keywords
Cyanocobalamin; Streptomyces baarnensis; HPLC; Identification
Statistics
Article View: 152
PDF Download: 386