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Studies on Isolation, Carbohydrate Make‐up and Rheological Properties of Galactomannan of Sesbania ( Sesbania aculeata Poir.) Seeds
Author(s) -
Wankhede D. B.,
Sawate A. R.,
Patil H. B.,
Ismail S.,
Deshpande H. W.,
Hashmi S. H.
Publication year - 1995
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19950471103
Subject(s) - galactomannan , sesbania , shear thinning , rheology , chemistry , botany , food science , polysaccharide , biology , biochemistry , materials science , composite material
Isolation, carbohydrate make‐up and rheological characteristics of galactomannan of the sesbania seeds have been investigated. The galactomannan gum yield was 36.5±1.5%, on whole seed basis. The galactomannan had [ a ]D 30 +46.5°, on acid hydrolysis yielded galactose and mannose in the proportion of 1.2:2.2. Rheological properties of aqueous solutions of the galactomannan were investigated over a wide range of shear rates. The power law model, T=KD n , was employed to describe flow behaviour of the galactomannan. The magnitude of flow behaviour index ‘n’ values lower than 1.0, and found to decrease as the concentration increased, indicating pseudoplastic flow. Similarly, consistency index (K) values were increased with increased concentrations of galactomannan. Thus, the galactomannan exhibited good thickening capacity.