GC$04$

$1.$ Yenzelwe ukuba i$-$pasteurize ijusi kwi$-80$ oC kunye ne$-$plug flow reactor $($PFR$)$ enomthamo we$-5$ L$.$ a$)$ Ukungasebenzi kwe$-$enzyme ye$-$pectin methyl esterase ngexesha le$-$pasteurization yejusi kwafunyaniswa ukuba ilandele i$-$kinetics yokuqala nge k $=0\mathrm{.}03$ min$-1$ kwi$-30$oC kunye k $=0\mathrm{.}2$ min$-1$ kwi$-60$oC$.$ Khangela i$-$flowrate enokuthi iqhutywe ukuba i$-$pasteurization yenziwe kwi$-80$oC kwaye ukukhutshwa kwe$-$enzyme efunekayo yi$-99\%.$ b$)$ Kwimeko $($a$),$ misela ipesenti yokuthotywa kwe$-$ascorbic acid $($ivithamin C$)$ kwijusi ngexesha le$-$pasteurization ukuba ukuthotywa kulandela i$-$kinetics yokuqala kunye ne$-$k $=0\mathrm{.}1$ min$-1$ kwi$-80$oC