Document Details

Document Type : Article In Journal 
Document Title :
PRODUCTION OF FOOD GRADE EXOPOLYSACCHARIDE FROM Rhizobium meliloti.II: CHARACTERIZATION OF POLYSACCHARIDE
انتاج سكريدات عديده للاستخدام الغذائى بواسطه خلاياRhizobium meliloti: توصيف السكريدات العديدة
 
Document Language : English 
Abstract : ABSTRACT Study of main characteristics of R. meliloti polysaccharides shows that polysaccharides produced in standard medium (RPS) differed in their chemical characteristics than produced from molasses medium (RPM) under the optimum cultural conditions since, RPS contained less amount of moisture (12.3%), protein (0.6%), ash (7.9%) and high amounts of total carbohydrate (79.2%) than RPM Which contained 14.6% moisture, 3.6% protein, 25.9% ash and 55.9 total carbohydrate. Also RPM recorded higher surface tension and pH values than RPS. The HPLC-analysis of polysaccharides using Rhizobium meliloti reveals, that RPS or RPM contain glucose, galactose and disaccharides, but with different ratios. Both types contain < 2% Rhamnose and its alcohol form (rhamnitol). RPM contains both glucouronic and galacturonic acids in equal ratios, while RPS contains only galacturonic acid. RPM contains arabinose and methyl--xylopyranoid, while RPS was free from these compounds. Addition of up to 15% sucrose or up to 3% NaCl reduced the apparent viscosity of 1% RPM solution. All tested polysaccharides and gum mixtures of RPM with guar gum, xanthan or carrageenan have a non-newtonian behaviour (pseudoplastic). The best mixing ratio was 50:50 and the best mixture was RPM with xanthan. 
ISSN : 10 
Journal Name : Annals Agric. Sci., Moshtohor 
Volume : 35 
Issue Number : 4 
Publishing Year : 1418 AH
1997 AD 
Article Type : Article 
Added Date : Friday, September 2, 2011 

Researchers

Researcher Name (Arabic)Researcher Name (English)Researcher TypeDr GradeEmail
محمد حسين مدكورMadkour, Mohamed HusseinResearcherDoctoratemadkour55@yahoo.com

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