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Modeling and Optimization of Ultrasound‐Assisted Extraction of Polysaccharide from the Roots of A lthaea officinalis
Author(s) -
Pakrokh Ghavi Peyman
Publication year - 2015
Publication title -
journal of food processing and preservation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.511
H-Index - 48
eISSN - 1745-4549
pISSN - 0145-8892
DOI - 10.1111/jfpp.12454
Subject(s) - polysaccharide , response surface methodology , dpph , extraction (chemistry) , chemistry , antioxidant , yield (engineering) , chromatography , raw material , solvent , officinalis , botany , organic chemistry , materials science , biology , metallurgy
Abstract The technological conditions involved in ultrasound‐assisted extraction process were optimized to achieve the maximum yield of crude polysaccharides from the roots of A lthea officinalis using a response surface method. The antioxidant effects of polysaccharide extracted under optimal conditions in terms of 1,1‐diphenyl‐2‐picryl‐hydrazyl ( DPPH ) and hydroxyl radical‐scavenging capacities were then investigated. The results showed that a second‐order polynomial regression model with a high R 2 value (0.985) can adequately fit the experimental data. The optimal conditions for the maximum yield (12.0%) within the experimental range of the variables studied were at ultrasound power of 86.44 W, extraction time of 36.86 min, extraction temperature of 79.93C and ratio of liquid/raw material of 39.99 mL/g. Under this condition, the extracted polysaccharide effectively scavenged DPPH and OH free radicals, and more concentrations of this polysaccharide indicated potent antioxidant activity in a dose‐dependent manner. Practical Applications Antioxidant polysaccharides of A lthea officinalis are conventionally extracted using traditional heating method, which is laborious, time‐consuming and requires a large volume of solvent. A technique incorporating ultrasound technology has been developed in the current research, which can help to extract these macromolecules from the roots of this medicinal plant. An investigation is needed to determine the optimum extraction conditions to obtain a desirable yield with high antioxidant activity for the A . officinalis polysaccharide. Optimization of ultrasonic‐assisted extraction of the studied polysaccharides can thus provide a functional component to use in food systems.