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KMID : 1007520210300101339
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Food Science and Biotechnology
2021 Volume.30 No. 10 p.1339 ~ p.1346
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Infusion efficiency of fluorescein derivatives of different molecular sizes into various starches under atmospheric and high hydrostatic pressures
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Kim Kye-Sun
Oh Seon-Min
Choi Seung-Hyun
Choi Jong-Hyun
Bae Ji-Eun
Kim Hui-Yun
Ye Sang-Jin
Baik Moo-Yeol
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Abstract
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Fluorescein isothiocyanate-dextrans (FDs) of different molecular weights were infused into corn, waxy rice, tapioca, and potato starches under atmospheric and high hydrostatic pressures (HHP). FD4, FD10, FD20, and FD40 (Mw 4000, 10,000, 20,000, and 40,000, respectively) were used as infusion materials. Confocal laser scanning microscopy confirmed that all FDs except FD40 infused into corn, waxy rice, and tapioca starches. However, no FDs infused into potato starch. Corn starch had the highest amounts of infused FDs. As molar mass increased, the amount of infused FD decreased in all starches. The infused amounts of FDs in corn starch were similar at 200?300 MPa and atmospheric pressure. Infusion of FDs at 400 MPa was reduced due to partial gelatinization. These results confirm that infusion efficiency is inversely proportional to the molecular weight of the infused material and large materials (Mw?>?40,000) cannot be infused into starch granules under atmospheric pressure or HHP.
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KEYWORD
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Starch, Fluorescein isothiocyanate-dextran, Infusion, Molecular weight, High hydrostatic pressure
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