Thank you for replying.
Currently I am doing research on effect of microcapsulation on herbs by using spray drying and freeze drying.
One of the characteristics that I investigate is water activity of powder.
For your information, the concentration of maltodextrin used for my research are 5%, 10% and 15% for spray drying and freeze drying. However, the final results showed that the water activity are increasing from concentration of maltodextrin 5% until 15%. According to previous study,the results showed the water activity should be decreased as increasing of concentration of maltodextrin.
Is it clear? :)
Thank you :)