Abstract
The drying of hydrocolloid beads results in cellular moieties, and this chapter therefore deals with cellular solids. A few manufacturing methods for hydrocolloid cellular solids are described. They include, but are not limited to, drying bicarbonate-containing gels after acid diffusion, and cellular solids produced by fermentation and enzymatically. A special section deals with the inclusion of oils in gels and their influence on the properties of the resultant dried cellular solid. Several methods, e.g., compression studies, are described for evaluating the mechanical properties of the dried beads. The chapter also details the models used for describing these beads’ stress–strain behavior. The structure and acoustic properties of such cellular solids as a result of production method are also addressed. The applications of dried beads have never been thoroughly reviewed. This chapter attempts to redress this by describing their use as carriers for vitamins, as study models, and for separation, and includes special dry beads for water treatment and matrices entrapping hydrocolloid cellular beads. Hydrocolloid cellular carriers for agricultural uses are also presented, e.g., the preservation of biocontrol agents in a viable form by dry cellular bead carriers, and the carriers’ capacity to protect these agents against UV radiation. The chapter ends with a discussion on the textural features of dried hydrocolloid beads.
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Nussinovitch, A. (2010). Dry Bead Formation, Structure, Properties, and Applications. In: Polymer Macro- and Micro-Gel Beads: Fundamentals and Applications. Springer, New York, NY. https://doi.org/10.1007/978-1-4419-6618-6_6
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