Studies on Tanzanian Acacia gums. Part 3. Some properties of gum exudates from the series Vulgares and Gummiferae

Some properties of gum exudates from Tanzanian Acacia Senegal var. leiorhachis, A. polyacantha ssp. campylacantha and A. tortilis ssp. spirocarpa are presented, and compared with Sudanese commercial Acacia gums. Some properties of the gum exudates from A. Senegal var. leiorhachis and A. polyacantha ssp. campylacantha show significant differences from Sudanese Acacia gums by having a higher proportion of insoluble gel fraction, lower magnesium content and higher viscosity. Furthermore, the methoxyl content of A. polyacantha spp. campylacantha gum is higher than previously reported. The viscosity ofA. tortilis ssp. spirocarpa gum, on the other hand, is similar to that of Sudanese Acacia gums at the same concentration. However, the nitrogen content is higher, whereas its alkaline earth metal content is lower.