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L-Ascorbic acid (vitamin C) was freeze-dried along with the following six types of wall materials: soluble soybean polysaccharide (SSPS), gum arabic (GA), maltodextrin (MD), α-cyclodextrin (α-CD), trehalose (Tre) and lactose (Lac). α-CD, Tre and Lac were used in mixtures with MD (weight ratio of 1:1). The decomposition kinetics of L-ascorbic acid in these powders stored at 80 °C and relative humidities...
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