The SEM micrographs of individual and mixed fruit powder are illustrated in Fig. 1. There were no distinct differences in particle shape
observed among the powders. Micrographs revealed that powder particles of all powders were irregular in shape and crystalline in structure.
Irregular shape of powder particles was due to the fibrous and porous nature of the fruit powders since powder was prepared from whole fruits by
freeze drying. Whole fruit powders are constituted with various hydrophilic fibrous substances such as fiber, sugar, protein and fat and thus
form complex and agglomerated particles. It has been reported that variation in particle size and size distribution may be caused by different compositions of the powders and their biological content [4]. These kinds of
properties cause the powders to easily form ‘cakes’ after exposure to the