Journal
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
Volume 128, Issue -, Pages 421-428Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ijbiomac.2018.12.247
Keywords
Kinetic modeling; Ultrasonic-assisted extraction polysaccharide; Nostoc commune Vauch
Funding
- National Natural Science Foundation of China [31460032, 81660581]
- Youth Talent Support Program of Lanzhou University of Technology [2018]
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Based on the theory of extraction and diffusion of Chinese herbal medicine, the dynamic model of ultrasonic assisted extraction process of polysaccharide from Nostoc commune Vauch. was established according to the second law of Fick, and further verified at different solid-liquid ratio (1/40-1/80 g/mL), temperature (313.15-353.15 K), ultrasonic power (240-600 W) and extraction time (0-25 min), the dynamic parameters including rate constant and relative extraction rate were respectively analyzed. The rate constant (k) gradually increased with the increase of temperature at different solid-liquid ratio. The maximum concentration of polysaccharide (NCVP) from N. commune was obtained with an optimal extraction condition at solid-liquid ratio of 1:50, extraction temperature of 353.15 K, ultrasonic power of 540 W and extraction time of 25 min. NCVP, the non reducing sugar with typical infrared spectrum characteristics of polysaccharide, dissolves in water but not dissolved in ethanol, acetone and petroleum ether and displays a good stability and smooth surface. The results provide the basis for NCVP in depth theoretical study of polysaccharide extraction processing. (C) 2019 Elsevier B.V. All rights reserved.
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