Effect of water activity on the release characteristics and oxidative stability of D-limonene encapsulated by spray drying

Apinan Soottitantawat, Hidefumi Yoshii, Takeshi Furuta (Corresponding Author), Masaaki Ohgawara, Pirkko Forssell, Riitta Partanen, Kaisa Poutanen, Pekka Linko

    Research output: Contribution to journalArticleScientificpeer-review

    127 Citations (Scopus)

    Abstract

    The stability of encapsulated d-limonene, which was prepared by spray drying, was studied in view of the release characteristics and oxidation stability. Gum arabic, soybean water-soluble polysaccharide, or modified starch, blended with maltodextrin were used as the wall materials. The powders were stored under the conditions of 23−96% relative humidity at 50 °C. The release rate and the oxidation rate were closely related to the relative humidity. The relationship was not simple. Initially, the release rate and the oxidation rate increased with increasing water activity, but around the glass transition temperature, the rates decreased sharply to increase again at a further increase of water activity. The results could be explained by a change in the powder structure, where a glass capsule matrix was changed into rubbery state during storage.
    Original languageEnglish
    Pages (from-to)1269 - 1276
    Number of pages8
    JournalJournal of Agricultural and Food Chemistry
    Volume52
    Issue number5
    DOIs
    Publication statusPublished - 2004
    MoE publication typeA1 Journal article-refereed

    Keywords

    • Microencapsulation
    • spray drying
    • retention
    • release
    • oxidation stability

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