TY - JOUR
T1 - Physicochemical, shear flow behaviour and emulsifying properties of Acacia cochliacantha and Acacia farnesiana gums
AU - Sibaja-Hernández, Roberto
AU - Román-Guerrero, Angélica
AU - Sepúlveda-Jiménez, Gabriela
AU - Rodríguez-Monroy, Mario
N1 - Publisher Copyright:
© 2015 Elsevier B.V.
PY - 2015/5/1
Y1 - 2015/5/1
N2 - The physicochemical, shear flow behaviour and emulsifying properties of gum exudates from Acacia cochliacantha and Acacia farnesiana were analysed and compared to those for Acacia senegal gum. Evaluation of physicochemical properties showed that A. farnesiana and A. senegal gums displayed levorotatory activity, relatively high carbohydrate/protein ratio and high content of dietary fibre. Similarly, A. farnesiana and A. senegal gums formed stable oil-in-water emulsions with smaller droplet sizes and coalescence rates in the order of 10-8, meaning for very stable disperse systems. Otherwise, A. cochliacantha gum was the only with dextrorotatory activity, high content of protein and arabinogalactan-proteins (AGPs), but low carbohydrate fraction; nevertheless, despite the possible advantages of high protein content associated with emulsifying properties, this polysaccharide showed lesser stability on emulsions. These results indicate that there is correlation between emulsion stability and an adequate carbohydrate/protein balance in the gums; additionally of the AGPs presence. Thus, A. farnesiana gum may be considered for oil-in-water emulsion stabilization and sources of soluble dietary fibre due to their relatively high polysaccharide fraction.
AB - The physicochemical, shear flow behaviour and emulsifying properties of gum exudates from Acacia cochliacantha and Acacia farnesiana were analysed and compared to those for Acacia senegal gum. Evaluation of physicochemical properties showed that A. farnesiana and A. senegal gums displayed levorotatory activity, relatively high carbohydrate/protein ratio and high content of dietary fibre. Similarly, A. farnesiana and A. senegal gums formed stable oil-in-water emulsions with smaller droplet sizes and coalescence rates in the order of 10-8, meaning for very stable disperse systems. Otherwise, A. cochliacantha gum was the only with dextrorotatory activity, high content of protein and arabinogalactan-proteins (AGPs), but low carbohydrate fraction; nevertheless, despite the possible advantages of high protein content associated with emulsifying properties, this polysaccharide showed lesser stability on emulsions. These results indicate that there is correlation between emulsion stability and an adequate carbohydrate/protein balance in the gums; additionally of the AGPs presence. Thus, A. farnesiana gum may be considered for oil-in-water emulsion stabilization and sources of soluble dietary fibre due to their relatively high polysaccharide fraction.
KW - Acacia gums
KW - Arabinogalactan-proteins
KW - Emulsifying properties
KW - Emulsion stability
UR - http://www.scopus.com/inward/record.url?scp=84922259532&partnerID=8YFLogxK
U2 - 10.1016/j.indcrop.2015.01.037
DO - 10.1016/j.indcrop.2015.01.037
M3 - Artículo
SN - 0926-6690
VL - 67
SP - 161
EP - 168
JO - Industrial Crops and Products
JF - Industrial Crops and Products
ER -