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Indian Journal of Chemical Technology (IJCT) >
IJCT Vol.12 [2005] >
IJCT Vol.12(1) [January 2005] >
| Title: | Effect of gamma radiation on solution viscosity of galactomannans: Influence of galactose : mannose ratio |
| Authors: | Issarani, Roshan
Nagori, B P |
| Keywords: | Depolymerization
gamma irradiation
galactomannas
locust bean
fenugreek
guar |
| Issue Date: | Jan-2005 |
| Publisher: | CSIR |
| IPC Code: | G05D 24/00 |
| Abstract: | Various seed galactomannans differ
from each other in G:M ratios, molecular weight and fine structure, w.r.t. the
distribution of galactose side groups on the main chain. In the present
investigation, galactomannan samples of fenugreek, guar and locust bean having
different G:M ratios of 1:1, 1:2 and 1:4 respectively, were exposed to
different doses of gamma radiation. Dispersions of the resulting products were
prepared and their viscosities were measured. A considerable fall in their
viscosities was noted. The lower viscosity is obtained due to the production of
lower molecular weight products, indicative of depolymerization. It was
observed that galactomannan having the highest galactose : mannose (G:M) ratio
of 1:1 resisted depolymerization the most in comparison to the galactomannan
possessing the lowest G:M ratio of 1:4. |
| Page(s): | 105-107 |
| ISSN: | 0975-0991 (Online); 0971-457X (Print) |
| Source: | IJCT Vol.12(1) [January 2005]
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