Main Page
Welcome
About the Center
About The SPC
Mission and Vision
Organizational Structure
Spc Directors
Facts and Figures
Services
ِActivities
Exhibitions
Print Exhibition
Books Exhibition
Visits
Training
Workshops
Courses
Seminars
Conventions
Celebrations
Research
Favorite Links
Contact Us
PhotoAlbum
Contact Us
Researches
عربي
English
About
Admission
Academic
Research and Innovations
University Life
E-Services
Search
Scientific Publishing Center
Document Details
Document Type
:
Article In Journal
Document Title
:
Selection of Microorganisms Producing Vitamin B12 from Local (saudi) Isolates
انتقاء الكائنات الحية الدقيقة المنتجة لفيتامين ب12 من عزلات محلية (السعودية)
Subject
:
Microbiology
Document Language
:
English
Abstract
:
Forty-six bacterial strains were highly varied in their effici~ncy to produce cell biomass and vitamin B12. Propionibacterium freudenreichii ATCC 6207 and two local bacterial isolates (Streptomyces 5184 and Methylomonas methanica 14B-16 were the most efficient strains. Productivity of vitamin BI2 was affected by culturing methods (shake and static), and growth phases.T he highest Vitamin B 12p roductivity waso bserved in shake culture of P. freudenreichii (170.2 1Lg/100m l culture and 68.1ILgl/100 mg biomass dry wt.). This strain also showed a positive correlation between the amount of vitamin and elapsing of time. Other bacterial strains gave amounts of Vito B12r anging from 9.12 to 35.6 1Lg/100m l culture and from 1.19 to 43.6 1Lg/100m l dry wt. biomass. The most efficient strains also showed a high productivity at early stage of growth in shake culture.
ISSN
:
1012-1319
Journal Name
:
Science Journal
Volume
:
3
Issue Number
:
1
Publishing Year
:
1411 AH
1991 AD
Number Of Pages
:
10
Article Type
:
Article
Added Date
:
Sunday, October 11, 2009
Researchers
Researcher Name (Arabic)
Researcher Name (English)
Researcher Type
Dr Grade
Email
منصور جميل سجيني
M. J. SEJINY
Researcher
الشحات محمد رمضان
E. M. RAMADAN
Researcher
عبدالرحمن محمد القرشي
A. M. ALQURASHI
Researcher
Files
File Name
Type
Description
22636.pdf
pdf
Back To Researches Page