2.7. Powder Dispersibility

This was estimated from the turbidity of the powder dispersed in water. First, 0.3 g of agglomerate was added to 100 mL of distilled water, which was immediately stirred to disperse the agglomerate. The turbidity of the dispersion was then measured via a turbidimeter (AQ4500, Thermo Fisher Scientific Inc., Waltham, MA, USA) after stirring for 10, 20, 30, 60, 90, 120, 150, and 180 s. However, the turbidities of the suspended fine gum powders and the LBG agglomerates were not measured because too much noise was caused by the formation of large lumps during dispersal.