Original research article
Application of Different Drying Methods on β-Glucan Isolated from Spent Brewer’s Yeast Using Alkaline Procedure
2010, 75 (1) p. 45-50
Vesna Zechner-krpan, Vlatka Petravić-tominac, Petra Galović, Vanja Galović, Jelena Filipović-grčić, Siniša Srečec
Abstract
Water-insoluble (particulate) β-glucan was isolated from the cell walls of spent brewer’s yeast using a single-step alkaline treatment. To stabilize β-glucan water suspensions, sonication was successfully applied. Three different drying methods were used: air-drying, lyophilization and spray-drying. Air-drying and lyophilization caused β-glucan particles agglomeration and changes of their microstructure. Sonication combined with spray-drying resulted in minimal β-glucan structural changes and negligible formation of agglomerates. Reaggregation of spray-dried β-glucan particles was minimal even after resuspending in water.
Keywords
β-glucan, drying, sonication, spent brewer’s yeast
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