Modeling and Optimization of Ultrasound-Assisted Extraction of Polysaccharide from the Roots of A lthaea officinalis

Abstract

The technological conditions involved in ultrasound-assisted extraction process were optimized to achieve the maximum yield of crude polysaccharides from the roots of Althea officinalis using a response surface method. The antioxidant effects of polysaccharide extracted under optimal conditions in terms of 1,1-diphenyl-2picryl-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.

Optimization of ultrasound‐assisted extraction of functional polysaccharides from common mullein (Verbascum thapsus L.) flowers

“…Improving the UAE process can be attributed to the more destruction of plant cells and the intensified mass transfer and capillary penetration rate of mucilaginous materials (Iida, Tuziuti, Yasui, Towata, & Kozuka, ). Similar results were reported for polysaccharides extracted for marshmallow ( Althaea officinalis L.) roots (Pakrokh Ghavi, , b), valerian ( Valeriana officinalis L.) roots (Hromádková, Ebringerová, & Valachovic, ), and sage ( Salvia officinalis L.) (Hromádková, Ebringerová, & Valachovic, ), using UAE technique.…”

Cucurbita Plants: From Farm to Industry

“…C. moschata fruit is a rich source of polysaccharides, with a useful biological benefit, i.e., cytoprotective and antioxidative activities [114,115], that can reach 16.2% in dry matter, under optimised conditions [116]. Xia and Wang [117] reported high amounts of D-chiro-inositol, a hypoglycaemic molecule, in C. ficifolia fruit (without seeds).…”

Kinetics Study of Oil Extraction from Calophyllum inophyllum Seeds Using Ultrasonic-assisted Extraction Technique

“…This might decrease the efficiency of the ultrasound energy transmitted into the medium and as a result, the oil yield would no longer increase. 27 The mass transfer coefficient for washing (k 1 ) increased when the ultrasonic power was raised from 190 W to 210 W but thereafter decreased slightly while the mass transfer coefficient for diffusion stage (k 2 ) increased with increasing ultrasonic power. These results reveal that oil extraction occurs at a higher rate as the ultrasonic power increases.…”