Txiv hmab txiv ntoo thiab zaub 'xim yog heev hloov los ntawm khov kom qhuav, tseem hu ua Lyophilization, feem ntau yog txoj hauv kev zoo. Txhawm rau kom cov dej khov rau subloter ncaj qha los ntawm cov khoom rau roj, tus txheej txheem khaws cia no ua ntej nrog cov khoom lag luam khov khov. Khov kom qhuav tshwj tseg cov khoom lag luam qub, xim, tsw, thiab kev sib piv rau lwm cov kev tov kom qhuav uas suav nrog cov cua sov.
Lub peev xwm ntawm khov kom qhuav kom tswj hwm cov kev huiv tiag tiag ntawm cov txiv hmab txiv ntoo thiab zaub yog ib qho ntawm nws cov txiaj ntsig. Vim tias cov txheej txheem yog nqa tawm thaum kub heev, nws zam cov browning cov tshuaj tiv thaiv thiab thermal detheration uas yuav tshwm sim nrog lwm yam kev tov kom qhuav. Qhov no ua rau pom cov khoom siv ua tiav tiav los ntawm kev khaws cia lub siab reds, zaub ntsuab, thiab txiv kab ntxwv ntawm cov zaub tshiab rau qhov txiav txim siab.
Tsis tsuas yog muaj cov xim txuag kom muaj txiaj ntsig zoo nkauj, tab sis nws tseem qhia tau tias cov txiv hmab txiv ntoo thiab zaub tau raug tswj xyuas. Numerous colors found in fruits and vegetables-like berries' anthocyanins or carrots' beta-carotene-also serve as vital nutrients and antioxidants. Quav qhuav kom muaj peev xwm ua kom txuag tau ntawm qhov zoo ntawm kev noj qab haus huv ntawm cov txiv hmab txiv ntoo tshiab los ntawm kev khaws cov pigments no.
Tsis tas li ntawd, cov khoom lag luam txee lub neej yog nce los ntawm cov xim txuag kom qhuav, uas tshem tawm qhov xav tau ntawm cov duab khoom cuav lossis cov tshuaj tiv thaiv. Rau cov neeg siv khoom tshawb nrhiav rau ntuj, ntxiv-} zaub mov pub dawb, qhov no tseem ceeb heev. Khov -}} Cov txiv hmab txiv ntoo uas tau pom dua thiab muaj cov xim zoo nkauj dua thiab muaj cov xim zoo nkauj, uas txhawb cov kev xaiv noj hniav txom ncauj uas tau xaiv.
In conclusion, freeze drying successfully preserves fruits' and vegetables' original colors by halting the heat-induced deterioration that can happen with conventional drying techniques. Kev tuav cov khoom noj muaj txiaj ntsig zoo kuj tseem pom los ntawm cov xim txuag ntawm khov {2} Ua rau nws muaj txiaj ntsig zoo thiab muaj txiaj ntsig} sij hawm cia thiab siv.
