Journal
CARBOHYDRATE POLYMERS
Volume 155, Issue -, Pages 68-77Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2016.08.051
Keywords
Plantago major seed mucilage; Extraction process; Physicochemical properties; Molecular characteristics; FTIR
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The effect of different extraction procedures on functional properties of mucilage extracted from Plantago major seed were investigated using response surface methodology. Extraction at 75 degrees C, using 1:60 water:seed ratio at pH 6.8 was the best condition for maximum yield (15.18%), emulsion stability (67.4%), foam stability (88.4%), solubility (97.36%) and water absorption capacity (39.74 g/g) of mucilage. At this optimum point, PMSM had, on average 82.85% carbohydrate, 76.79 mgGAE/g(dry) total phenol content, 97.8 mg g(-1) total flavonoid content and 915.54 mu gml(-1) antioxidant activity. The results indicated that PMSM had average molecular weight of 1.2 x 10(6) Da. FTIR analysis demonstrated the presence of carboxyl, hydroxyl and methyl groups and glycoside bonds. The chain flexibility parameter, activation energy, xi-potential and droplet size for PMSM were determined as 946.09, 0.78 x 10(7)J/kgmol, 15.23 mV (at neutral pH) and 448.56 nm, respectively. Intrinsic viscosity for PMSM in deionized water was 14.24 dl g(-1). (C) 2016 Elsevier Ltd. All rights reserved.
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