Vol. 6, Issue 6 (2018)
Characterization and molecular weight distribution of gum from Acacia nilotica var. adstringens
Author(s): Abir EM Ajab, Mohammed E Osman, Elfatih A Hassan, Seifeldawla A Elhag and Eid I Brima
Abstract: Physical and chemical properties of gum exudates from Acacia nioltica var. adstringens from N. Kordofan State were determined. Average values of moisture and ash content of Acacia nioltica var. adstringens gum were 11.01% and 2.06% respectively, average of pH was 5.06. Average value of specific optical rotation and intrinsic viscosity were (+96.4) and (11.06cm3g-1) respectively. The average acid equivalent weight and total glucouronic acid were (1869) and (10.4%) respectively. Acid hydrolysis of the gum revealed a sugar content of arabinose (52%), galactose (24%) and traces of rhamnose (>1). The average value of nitrogen was (0.06%) and hence, protein content was (0.44%). The calorific value was (4.06 Kcal/g). The Cationic composition of gum is in order Ca > Mg >K > Na Fe, Zn, Sr, Mn, Sn, Zn,Cu and Ni, but As, Cd, Co, Cr and Pb are present as trace.
Gel permeation chromatography results show that three main components designated arabinoglactan protein (AGP), arabinoglactan (AG) and glactoprotein (GP). The molecular weight of the AGP was 2.54 x106 Da and a radius of gyration of 36.6 nm.
Pages: 2580-2583 | 334 Views 48 Downloads
download (5093KB)
How to cite this article:
Abir EM Ajab, Mohammed E Osman, Elfatih A Hassan, Seifeldawla A Elhag, Eid I Brima. Characterization and molecular weight distribution of gum from Acacia nilotica var. adstringens . Int J Chem Stud 2018;6(6):2580-2583.
