Title of article :
Depolymerisation of mucilage isolated from ruredzo (Dicerocaryum zanguebarium) by ascorbic acid in the presence of catalysts
Author/Authors :
Benhura، Mudadi A. N. نويسنده , , Mavhudzi-Nyambayo، Isabella نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 1999
Pages :
-370
From page :
371
To page :
0
Abstract :
No change was observed in the viscosity of samples of mucilage from Dicerocaryum zanguebarium when treated with 5 mM ascorbic acid. Mucilage was treated with ascorbic acid in the presence of copper and iron, and a mixture of the two ions. The effect of treatment was followed by gel filtration of products on a Sepharose 6B column and by measuring the amount of reducing sugars generated by the dinitrosalicylic acid (DNSA) method. The molecular weight of treated samples was lower than that of untreated controls. The amount of reducing groups was found to increase. When the mucilage was treated in a system containing hydrogen peroxide and copper ions, the polymer was also degraded, yielding fragments of lower molecular weight as reflected by the broadened gel filtration peak.
Keywords :
Sago starch , Proximate composition , amylose , Amylopectin
Journal title :
CARBOHYDRATE POLYMERS
Serial Year :
1999
Journal title :
CARBOHYDRATE POLYMERS
Record number :
52398
Link To Document :
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