engleski

Encapsulation of bioactive compounds from herbal extracts using spray drying

In the past few decades, the spray drying technique has gained wide acceptance as an alternative drying technique for transferring liquid forms into stable dry powder forms with application in the food, pharmaceuticals and cosmetic industry. Spray drying technique enables short operation time, drying of heat sensitive materials, desirable moisture content and desirable particle size of obtained powder. For the centuries, medicinal plants are considered as one of the most important sources of bioactive compounds. Different plant parts including leaves, flowers, stalks, fruits, seeds and roots but also whole plants are used for producing herbal pharmaceuticals, herbal cosmetic and dietary supplements. One of the most common used form are herbal extracts, produced with different extraction techniques (conventional and green novel techniques). Herbal extracts are highly concentrated in bioactive compounds such as phenolic compounds, tannins, alkaloids, pigments, vitamins, bioactive polysaccharides, peptides and volatile compounds with different biological properties. Liquid form of herbal extracts suffers from many disadvantages, such as short shelf life, higher cost of transport and storage. This chapter provides an overview on the principal applications related to encapsulation of bioactive compounds from herbal extracts with special attention on the choice of encapsulation agent on the quality of final dry extract. The application of spray drying represents a new promising drying technique for the production of dry extracts rich in bioactive compounds, which can be easily incorporated into new highly-valuable, bioactive compounds-rich products.

spray drying ; bioactive compounds ; herbal extracts ; medicinal plants

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