Starch (5.0 mg) was precisely weighed and mixed with distilled water (15 μL). The mixture was sealed in an aluminium pan overnight at 4 °C. After equilibrating for 1 h at room temperature, the starch sample was then heated from 25 to 130 °C at a rate of 10 °C min−1 using a differential scanning calorimeter (DSC 200 F3, Netzsch Instruments NA LLC; Burlington, MA).
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