. The band trend is much more similar at the first frying and third frying with a piece of potato at 1745–1747.5cm 1 and 1660– 1652.3 cm 1 respectively as in Figs. 1(c and d) and 2 (c and d).
. The band trend is much more similar at the first frying and third frying with a piece of potato at 1745–1747.5cm 1 and 1660– 1652.3 cm 1 respectively as in Figs. 1(c and d) and 2 (c and d).