Journal
JOURNAL OF FOOD SCIENCE AND TECHNOLOGY-MYSORE
Volume 53, Issue 4, Pages 2067-2076Publisher
SPRINGER INDIA
DOI: 10.1007/s13197-016-2193-0
Keywords
Soluble dietary fiber; Sensory viscosity rating; Instrumental viscosity; Flow behavior index; Psyllium husk; Guar gum; Tragacanth; Xanthan gum; Gum karaya; Carboxy Methyl Cellulose
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Funding
- National Dairy Research Institute, Karnal, India
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The shear-thinning low, medium and high-viscosity fiber preparations (0.15-1.05 % psyllium husk, 0.07-0.6 % guar gum, 0.15-1.20 % gum tragacanth, 0.1-0.8 % gum karaya, 0.15-1.05 % high-viscosity Carboxy Methyl Cellulose and 0.1-0.7 % xanthan gum) showed that the consistency coefficient (k) was a function of concentration, the relationship being exponential (R-2, 0.87-0.96; P < 0.01). The flow behaviour index (n) (except for gum karaya and CMC) was exponentially related to concentration (R-2, 0.61-0.98). The relationship between k and sensory viscosity rating (SVR) was essentially linear in nearly all cases. The SVR could be predicted from the consistency coefficient using the regression equations developed. Also, the relationship of k with fiber concentration would make it possible to identify the concentration of a particular gum required to have desired consistency in terms of SVR.
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