1. Tshuaj yej withering

Nyob rau hauv tus txheej txheem ntawmqhuav, cov tshuaj muaj pes tsawg leeg ntawm cov nplooj tshiab hloov maj mam.Nrog kev poob dej, qhov concentration ntawm cov kua cell nce, kev ua haujlwm enzyme nce, cov ntxhiab tsw ntsuab ntawm cov tshuaj yej yog ib nrab tawm, polyphenols me ntsis oxidized, qee cov proteins yog hydrolyzed rau hauv cov amino acids, thiab cov hmoov txhuv nplej siab yog decomposed rau hauv cov suab thaj.Cov kev hloov pauv no yog txhua yam tsim nyog rau kev txhim kho kom zoo.Vim muaj kev puas tsuaj me me rau cov xim ntsuab, cov nplooj xim yog xim ntsuab nrog cov xim daj ntsuab;hydrolysis ntawm cov protein thiab hmoov txhuv nplej siab nce cov ntsiab lus ntawm cov dej extract, thaum qhov piv ntawm polyphenols rau cov amino acids txo qis, uas ua rau cov tshuaj yej kua zaub xim hloov mellow.

2. Tshuaj yej fixation txheej txheem

Thaum lub sij hawmhigh-temperature fixation txheej txheem, cov dej noo ntawm cov nplooj tshiab sai sai vaporizes thiab evaporates nyob rau hauv ntau qhov ntau, thiab qis-boiling Cheebtsam nrog ntsuab tsw thiab tsis kaj siab tsw yog volatile, thiab cov aromatic high-boiling Cheebtsam yog qhia;Nyob rau tib lub sijhawm, nyob rau hauv qhov kev txiav txim ntawm thermophysical chemistry, qee qhov tshwj xeeb aromas tau tsim.

Cov nplooj tshiab muaj cov ntsiab lus dej siab thiab cov ntsiab lus muaj txiaj ntsig, yog li lawv yuav tsum tau do-kib ntxiv thaum lawv kho kom muaj cov aroma thiab khaws cov ntsuab;Cov nplooj qub muaj cov ntsiab lus dej tsawg thiab cov ntsiab lus amino acid tsawg.Txhawm rau txhim kho qhov saj ntawm cov tshuaj yej kua zaub ntawm cov nplooj qis qis, nws yog ib qho tsim nyog yuav tsum tau ua kom cov qib ntawm qhov txhaws.