Cov roj zaub, hauv kev sib piv rau cov roj zaub, yog cov khoom siv hydrogenation (ua kom tawv) ntawm cov roj zaub (xibtes, paj noob hlis, thiab lwm yam), uas yog tom qab ntawd siv dav hauv kev lag luam khoom noj khoom haus hloov chaw ua mis nyuj muaj roj, rau kev ua ncuav ci, xws li tob rog, thiab lwm yam. Cov kws saib xyuas khoom noj khoom haus ceeb toom txog cov kev phom sij ntawm cov rog no.
Nws yog qhov tsim nyog
cov iav uas muaj zog lossis lub khob loj dua
Cov Lus Qhia
Kauj ruam 1
Yuav tau ceev faj txog cov khoom lag luam xws li ice cream, croutons, chips, chocolate, margarine, confectionery, condensed milk, cheese, butter, kis. Kev tshawb nrhiav cov khoom lag luam no tau pom tias lawv muaj cov ntsiab lus siab tshaj plaws ntawm cov roj txiv maj phaub tawv. Xibtes roj yog cov roj zaub pheej yig tshaj plaws hauv lub ntiaj teb ua lag luam, txawm li cas los xij, qee cov khoom lag luam ntawm nws cov hardening yog neeg txawv teb chaws rau tib neeg lub cev (piv txwv li, qee qhov hauv qab ntawm lawv decompose tsuas yog kub siab tshaj 40 ° C).
Kauj ruam 2
Ua tib zoo saib cov ntawv sau ntawm cov khoom lag luam mis nyuj: cov tuam txhab tsim khoom yuav tsum hloov lub npe ntawm cov khoom yog tias cov zaub ua rog tau siv hauv nws qhov kev npaj. Piv txwv li, cheese hu ua "cov khoom lag luam cheese", cov khoom noj khoom haus cheese - "txheej txheem cheese khoom", tsev cheese - "cheese" lossis "cov khoom lag luam", "curd". Hloov "qaub cream" rau ntawm daim ntawv sau yuav muaj "qaub cream khoom", "qaub cream", kua mis hu ua "mis nyuj", "khoom siv mis nyuj", butter - "lub teeb butter".
Kauj ruam 3
Ua tibzoo saib ntawm daim ntawv qhia ua dej khov: tej zaum yuav muaj hom khoom noj qab zib uas tau nyiam txij thaum yau los, tab sis lo lus "ice cream" nws tus kheej yuav tsis nyob ntawd. Qhov no txhais tau tias cov khoom muaj roj ntau hauv cov zaub muaj roj thiab yuav tsum tsis txhob hu ua mis nyuj khov. Yog tias nws cov ntsiab lus yog tsawg (txog 50%), " dej khov "yuav nyob ntawm daim ntawv lo, thiab qhov no, kom tsis txhob noj cov rog li ntawm 100%, koj yuav tsum ua tib zoo saib cov qauv ntawm cov khoom. Hauv cov lus sib xyaw ntawm "khoom noj mis nyuj khov" koj tuaj yeem nrhiav: "dej khov nab kuab nrog cov khoom sib xyaw ua ke ntawm cov khoom siv raw", "ice cream nrog zaub roj".
Kauj ruam 4
Thaum xaiv cov roj butter, ua tibzoo saib lub npe thiab kev sib xyaw ntawm cov khoom. Cov roj lub teeb yog cov khoom lag luam siv cov rog cov zaub, cov ntsiab lus ntawm cov rog zaub yog qhia nyob rau hauv cov lus muaj. Qhov xwm txheej nrog kis tau yog ntau qhov tshwj xeeb, txij li txoj cai tau tsim cov ntsiab lus ntau tshaj plaws ntawm cov rog zoo li ntawd hauv lawv - txog 70%, raws li rau margarine, tsis muaj kev txwv ntawm no, thiab nws tuaj yeem muaj 100% cov zaub nyoos.
