FZ$091.$ na$-$ezubere pasteurize ihe $$ na $80$ oC na a plug eruba reactor $($PFR$)$ na$-$enwe a olu nke $5$ L$.$ a$)$ The inactivation nke enzyme pectin methyl esterase n'oge pasteurization nke ihe $$ h$$r$$ na$-$eso mb$$ iji kinetics na k $=0\mathrm{.}03$ min$-1$ na $30$oC na k $=0\mathrm{.}2$ min$-1$ na $60$oC$.$ Kpebisie ike na$-$agbap$$ta nke nwere ike $$hazi ma $$ b$$r$$ na a na$-$eme pasteurization na $80$oC na nkw$$s$$ nke enzyme ach$$r$$ b$99\%.$ b$)$ Maka $$n$$d$$ na $($a$),$ ch$$p$$ta pasent nke mmebi nke ascorbic acid $($vitamin C$)$ na ihe $$ n'oge pasteurization ma $$ b$$r$$ na mmebi ah$$ na$-$agbaso usoro mb$$ kinetics na k $=0\mathrm{.}1$ min$-1$ na $80$oC$.$