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By using different concentrations of alginate and calcium chloride solutions, calcium alginate beads (CAB) of different sizes and shapes were prepared. Macro-CAB were spherical and of size 1.33 mm and micro-CAB were oblong shape of size 0.45×0.22 mm as determined by SEM. For ease of handling and storage of natural colorant, the red anthocyanin extract from Dendrobium Sonia ‘Red Bom’ (DSAE) orchid...
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