TY - JOUR
T1 - Stepwise extraction of Lepidium sativum seed gum: Physicochemical characterization and functional properties
AU - Razmkhah, Somayeh
AU - Razavi, Seyed Mohammad Ali
AU - Mohammadifar, Mohammad Amin
AU - Koocheki, Arash
AU - Ale, Marcel Tutor
PY - 2016
Y1 - 2016
N2 - Cress seed gum (CSG) was fractionated using stepwise extraction with water, yielding three fractions (F1, F2, F3) whose average molecular weights ranged from 863 to 1080 kDa. The chemical composition (monosaccharide, ash, moisture, CHN and uronic acid contents) and molecular weight of the fractions varied significantly. Generally, the major identical peaks of FT-IR spectra for three fractions and whole cress seed gum were similar. The results of DSC and TGA indicated that F3 had the highest thermal stability and considering the initial decomposition temperature, the decreasing order of thermal stability was F3 > F2 > F1. Cress seed gum and its fractions exhibited non-Newtonian shear thinning behavior which the Herschel-Bulkley model was successfully described the steady shear flow behavior of samples, and apparent viscosity followed the order of F3 > F2 > F1. F3 exhibited the best surface tension reducing ability compared to other fractions and CSG. All the samples had good emulsifying capability (>97%) and stability(>96%). The emulsion capacity increased slightly along the series of F1, F2 and F3, whereas, emulsion stability decreased along the same series. CSG and F3 showed the highest and the lowest foaming capacity and stability, respectively. © 2016 Elsevier B.V. All rights reserved.
AB - Cress seed gum (CSG) was fractionated using stepwise extraction with water, yielding three fractions (F1, F2, F3) whose average molecular weights ranged from 863 to 1080 kDa. The chemical composition (monosaccharide, ash, moisture, CHN and uronic acid contents) and molecular weight of the fractions varied significantly. Generally, the major identical peaks of FT-IR spectra for three fractions and whole cress seed gum were similar. The results of DSC and TGA indicated that F3 had the highest thermal stability and considering the initial decomposition temperature, the decreasing order of thermal stability was F3 > F2 > F1. Cress seed gum and its fractions exhibited non-Newtonian shear thinning behavior which the Herschel-Bulkley model was successfully described the steady shear flow behavior of samples, and apparent viscosity followed the order of F3 > F2 > F1. F3 exhibited the best surface tension reducing ability compared to other fractions and CSG. All the samples had good emulsifying capability (>97%) and stability(>96%). The emulsion capacity increased slightly along the series of F1, F2 and F3, whereas, emulsion stability decreased along the same series. CSG and F3 showed the highest and the lowest foaming capacity and stability, respectively. © 2016 Elsevier B.V. All rights reserved.
KW - Composition
KW - Fractionation
KW - Functional propertes
KW - Hydrocolloid
KW - Surface tension
KW - Thermal properties
U2 - 10.1016/j.ijbiomac.2016.04.024
DO - 10.1016/j.ijbiomac.2016.04.024
M3 - Journal article
C2 - 27083846
SN - 0141-8130
VL - 88
SP - 553
EP - 564
JO - International Journal of Biological Macromolecules
JF - International Journal of Biological Macromolecules
ER -