Optimization of Variables for Aqueous Extraction of Gum from Grewia mollis Powder. (23rd March 2014)

• Record Type: Journal Article
• Authors: Panyoo Akdowa, Emmanuel; Boudjeko, Thaddee; Woguia, Alice Louise; Njintang-Yanou, Nicolas; Gaiani, Claire; Scher, Joel; Mbofung, Carl Moses F.
• Other Names: Grohens Yves Academic Editor.
• Is Part Of: Journal of polymers. Volume 2014(2014)
• Publication Date: 2014-03-23
• Subjects: Polymers -- Periodicals; Polymers; Electronic journals; Periodicals; 547.7
• DOI: 10.1155/2014/926850
• Languages: English
• ISSNs: 2356-7570

Abstract

Abstract : Grewia gum is a polysaccharide derived from the inner stem bark of the edible plant Grewia mollis . Juss (family Tiliaceae). It is a savanna shrub that grows wildly but is usually cultivated in Nigeria and Northern part of Cameroon. The main goal of the present study was to investigate the effect of aqueous extraction conditions on the extraction yield and physicochemical properties of the Grewia mollis . The studied aqueous extraction variables were water/powder (W/P) ratio (10 : 1–80 : 1 w/p), temperature (25.0–85.0 ∘ C), time (1–3 h), and pH (4.0–10.0). The results indicated that the aqueous extraction variables exhibited the least significant (P < 0.05 ) effect on the yield and the viscosity of the gum. The result shows that the ratio of extraction is the main factor affecting the extraction of gum. The optimized extraction condition for higher viscosity was at the powder/water ratio of 1 : 55.4, pH of 7, time of 1 h, and temperature of 50 ∘ C. However, the optimized extraction condition for higher yield was at the powder/water ratio of 1 : 80, pH of 4, time of 3 h, and temperature of 73 ∘ C .