Cov Ntsiab Lus Tseem Ceeb ntawm Kev Siv Tshuab Nuv Ntses
Kev siv tshuab ua khoom nuv ntses yog ib qho kev tshawb fawb thiab kev xyaum uas kawm txog yuav ua li cas tuav, ua, khaws cia, ntim khoom, khaws cia, thiab faib cov khoom nuv ntses kom ntseeg tau tias lawv muaj kev nyab xeeb, zoo, thiab muaj txiaj ntsig zoo rau kev lag luam. Cov khoom nuv ntses suav nrog ntses, cws, squid, shellfish, crab, seaweed, thiab lawv cov khoom siv. Nrog rau qhov kev thov nce ntxiv rau cov protein tsiaj txhu thiab qhov kev sib tw ntawm kev puas tsuaj sai ntawm cov khoom noj, kev siv tshuab ua khoom nuv ntses yog qhov tseem ceeb rau kev txo qis kev poob tom qab sau qoob loo, tswj kev nyab xeeb ntawm cov khoom noj, thiab nthuav dav ntau yam khoom uas cov neeg siv khoom nyiam.
Cov yam ntxwv ntawm cov khoom nuv ntses uas yuav lwj tau
Ib qho ntawm cov laj thawj tseem ceeb uas ua rau cov khoom lag luam ntses xav tau kev tuav tshwj xeeb yog lawv qhov xwm txheej uas lwj sai heev. Feem ntau cov nqaij ntses muaj cov dej ntau, pH ze li nruab nrab, thiab cov protein thiab cov rog uas yooj yim hloov pauv. Tom qab ntses tuag, muaj ntau yam txheej txheem tshuaj lom neeg thiab tshuaj lom neeg tshwm sim uas ua rau lawv cov khoom tsis zoo, xws li:
1. Autolysis (enzymatic): Cov enzymes ntuj hauv lub cev ntses zom cov nqaij, ua kom cov qauv mos thiab tsim cov tshuaj tsw qab.
2. Kev ua haujlwm ntawm cov kab mob me me: Cov kab mob lwj loj hlob sai, tshwj xeeb tshaj yog thaum cov ntses nyob rau hauv chav sov.
3. Kev sib xyaw ua ke ntawm cov rog: Hauv cov ntses rog (piv txwv li ntses tuna, ntses sardines), cov rog yooj yim sib xyaw ua ke, ua rau muaj ntxhiab tsw phem.
4. Kev hloov pauv ntawm lub cev: Xim ploj mus, qhov muag tsis ci ntsa iab, cov pos hniav xim av, cov hnoos qeev nce ntxiv, thiab cov nqaij poob nws qhov elasticity.
Yog li ntawd, lub hauv paus ntsiab lus ntawm kev siv tshuab nuv ntses yog kom qeeb lossis nres cov txheej txheem no los ntawm kev tswj qhov kub thiab txias, kev huv, kev kho lub cev, tshuaj lom neeg, lossis kev kho mob biological.
Kev Ua Haujlwm Tom Qab Sau Qoob Loo: Txheeb Xyuas Qhov Zoo Txij Thaum Pib
Qhov zoo ntawm cov khoom nuv ntses yog qhov tseem ceeb txij thaum pib, txawm tias thaum nuv ntses lossis sau qoob loo. Kev tuav kom zoo yog lub hom phiaj kom khaws cia qhov tshiab thiab tiv thaiv kev ua qias tuaj. Cov kauj ruam tseem ceeb suav nrog:
– Kev cais thiab ntxuav: Kev cais cov ntses raws li qhov loj me, hom, thiab qhov tshiab. Kev ntxuav yog ua nrog dej huv kom txo cov av thiab cov kab mob me me.
– Kev siv cov txheej txheem txias: Txias tam sim ntawd siv dej khov lossis lub tshuab ua kom txias. Qhov sib piv ntawm dej khov rau ntses feem ntau raug kho raws li lub sijhawm ntawm txoj kev mus ncig thiab qhov kub thiab txias ib puag ncig.
– Kev ntxuav cov cuab yeej thiab cov thawv: Cov thawv cia khoom, cov rooj, cov riam thiab cov chaw kov yuav tsum huv si kom tiv thaiv kev sib kis kab mob.
– Kev siv maj mam: Tsis txhob siv zog ntau dhau uas yuav ua rau cov nqaij puas tsuaj thiab ua rau cov kua dej tawm sai dua (ntws).
Yog tias tuav kom zoo, cov khoom siv raw uas nkag mus rau theem ua tiav yog qhov zoo tshaj plaws kom cov khoom kawg kuj zoo dua.
Cov Txheej Txheem Rau Kev Khaws Cov Khoom Nuv Ntses
Kev khaws cia lub hom phiaj yog kom ntev lub sijhawm khaws cia thiab tswj qhov zoo ntawm kev hnov qab (qab, tsw qab, qauv) thiab kev nyab xeeb ntawm cov zaub mov. Qee txoj hauv kev khaws cia tseem ceeb yog:
1. Kev Txias thiab Kev Khov
– Kev txias (0–4°C) ua rau cov kab mob me me thiab cov tshuaj enzyme qeeb qeeb. Haum rau kev faib tawm luv luv.
– Kev khov (qis dua -18°C) yuav tiv thaiv cov kab mob me me kom tsis txhob loj hlob thiab ua rau cov tshuaj lom neeg qeeb. Cov khoom khov tuaj yeem nyob tau ntau lub hlis, yog tias qhov kub thiab txias tsis hloov pauv ntau kom tiv thaiv kev kub hnyiab thiab kev puas tsuaj ntawm cov qauv.
2. Kev ziab
Kev ziab kom qhuav yuav txo cov dej noo kom cov kab mob me me tsis tuaj yeem loj hlob. Txoj kev no tuaj yeem ua tau ib txwm muaj (qhuav los ntawm lub hnub) lossis niaj hnub (qhov cub, lub tshuab ziab). Cov khoom siv feem ntau suav nrog ntses ntsev qhuav, ntses anchovies qhuav, thiab ntses squid qhuav. Cov teeb meem hauv kev ziab suav nrog kev tswj kev huv, kev tswj kab, thiab kev vam khom huab cua.
3. Kev ntsev
Ntshav ua rau cov dej ua haujlwm tsawg dua thiab tuaj yeem tiv thaiv cov kab mob me me. Kev ntsev ua tau los ntawm:
- Kev ntsev qhuav (ntsev nchuav ncaj qha),
- Kev ua xua rau cov tshuaj (siv cov tshuaj saline).
Cov khoom xws li ntses ntsev thiab ntses ntsev siv txoj kev no, feem ntau ua ke nrog kev ziab.
4. Haus luam yeeb
Kev haus luam yeeb muab cov nyhuv tiv thaiv thiab muaj ntxhiab tsw tshwj xeeb. Cov tshuaj hauv cov pa luam yeeb (phenols, aldehydes) ua haujlwm ua cov tshuaj tua kab mob thiab cov tshuaj antioxidants. Muaj cov txheej txheem haus luam yeeb kub thiab txias. Kev tswj qhov kub thiab txias yog qhov tseem ceeb rau kev ua noj khoom kom zoo thiab muaj kev nyab xeeb, thaum txo qhov kev pheej hmoo ntawm cov tshuaj tsis xav tau.
5. Kev Ua Kom Qhuav
Kev ua kom cov khoom noj muaj ntxhiab siv cov kab mob me me lossis cov enzymes los tsim cov khoom muaj ntxhiab tshwj xeeb, xws li cov kua txob cw, bekasam, thiab cov peda uas tau ua kom cov khoom noj muaj ntxhiab. Kev ua kom cov khoom noj muaj ntxhiab zoo yuav tsum tswj cov khoom siv raw, cov ntsev, qhov kub, thiab kev huv kom ntseeg tau tias cov kab mob zoo tshaj plaws thiab cov khoom muaj kev nyab xeeb.
6. Kev ntim khoom noj hauv lub thawv
Kev ntim khoom noj hauv lub thawv yog cov txheej txheem ntawm kev khaws cia zaub mov los ntawm kev ua kom sov (ua kom huv si rau kev lag luam) hauv lub thawv kaw nruj. Piv txwv li suav nrog cov ntses sardines hauv lub thawv thiab cov ntses tuna hauv lub thawv. Lub hauv paus ntsiab lus yog tua cov kab mob thiab cov kab mob ua rau lwj, suav nrog cov uas tsim cov noob, thiab tom qab ntawd tiv thaiv kom tsis txhob muaj kab mob rov qab los. Cov txheej txheem no xav tau cov qauv nruj, tshwj xeeb tshaj yog kom tiv thaiv kab mob botulism.
Cov Ntsiab Cai Ua Khoom: Txij Li Cov Khoom Siv Raw Mus Rau Cov Khoom Muaj Nqis Ntxiv
Kev ua cov khoom nuv ntses lub hom phiaj yog kom muaj nqis ntxiv, txhim kho kev yooj yim ntawm kev siv, thiab nthuav kev lag luam. Qee hom kev ua tiav suav nrog:
- Cov nqaij qaib thiab cov nqaij ncej qab: Tsim cov nqaij txiav uas npaj txhij ua noj, ua rau nws yooj yim dua rau cov neeg siv khoom thiab kev lag luam ua noj.
– Surimi thiab nws cov khoom tsim tawm: Surimi yog cov protein concentrate ntses uas yog cov khoom siv raw rau cov pob ntses, cov ntses nuggets, kamaboko, thiab ntau yam khoom gel.
– Cov khoom noj uas npaj txhij noj lossis ua tiav lawm: Piv txwv li, ntses khov uas tau muab tso rau hauv lub raj mis, cov xov ntses, ntses siav hauv lub raj mis, thiab cov khoom noj txom ncauj uas muaj ntses ua.
– Kev rho tawm thiab siv cov khoom seem: Cov taub hau, pob txha, tawv nqaij, thiab cov quav tsiaj tuaj yeem siv ua roj ntses, hmoov ntses, collagen, gelatin, lossis pub tsiaj, yog li ntawd txo cov khib nyiab.
Tus yuam sij rau kev ua tiav yog kev xaiv cov khoom siv raw, cov mis tshuaj zoo, kev tswj cov txheej txheem, thiab kev kuaj xyuas zoo tsis tu ncua.
Kev Nyab Xeeb Khoom Noj thiab Qhov Zoo: Cov Qauv Tsis Sib Tham
Cov khoom nuv ntses muaj kev phom sij rau cov kab mob, tshuaj lom neeg, thiab lub cev. Yog li ntawd, kev siv lub tshuab ua kom zoo thiab kev nyab xeeb ntawm cov zaub mov yog qhov tseem ceeb heev. Cov ntsiab lus siv feem ntau suav nrog:
– GMP (Cov Kev Cai Tsim Khoom Zoo): Cov kev coj ua zoo hauv kev tsim khoom, suav nrog kev tu cev ntawm cov neeg ua haujlwm, kev tu cev ntawm qhov chaw, thiab cov txheej txheem ua haujlwm.
– SSOP (Cov Txheej Txheem Ua Haujlwm Kev Ua Haujlwm ntawm Kev Ua Huv): Cov txheej txheem kev ua huv uas tau sau tseg thiab sib xws.
– HACCP (Kev Tshawb Fawb Txog Kev Phom Sij thiab Qhov Chaw Tswj Xyuas Tseem Ceeb): Ib lub kaw lus uas txheeb xyuas cov kev phom sij thiab tsim cov chaw tswj xyuas tseem ceeb, piv txwv li qhov kub thiab txias thaum ua noj, qhov txias, lossis cov ntsev ntau npaum li cas.
Ntxiv rau, kev kuaj xyuas zoo suav nrog kev kuaj organoleptic (tsw, xim, kev ntxhib los mos), kev kuaj microbiological, cov dej hauv cov dej, cov ntsev hauv cov dej, TVB-N (qhia txog kev lwj), thiab kev kuaj kev ua qias tuaj xws li cov hlau hnyav hauv qee thaj chaw.
Kev Ntim Khoom thiab Kev Khaws Cia: Tswj Xyuas Qhov Zoo Txhua Txoj Kev Mus Rau Tus Neeg Siv Khoom
Kev ntim khoom tsis yog tsuas yog ua lub thawv xwb, tab sis kuj yog ib qho thaiv kev tiv thaiv cov pa oxygen, lub teeb, cov kuab paug, thiab kev puas tsuaj rau lub cev. Qee txoj hauv kev ntim khoom uas siv ntau yog:
- Kev ntim khoom siv nqus tsev: Txo cov pa oxygen ua rau qeeb qeeb oxidation thiab kev loj hlob ntawm cov kab mob aerobic.
– Kev Ntim Khoom Siv Huab Cua Hloov Kho (MAP): Kev hloov cov pa roj hauv cov ntim khoom (piv txwv li CO₂ siab) kom qeeb qeeb kev puas tsuaj.
– Cov ntim khoom uas muaj ntau txheej thiab tsis pub dej nkag: Tseem ceeb rau cov khoom khov thiab cov khoom qhuav uas ntsev kom tiv thaiv kom tsis txhob nqus dej noo.
Kev khaws cia yuav tsum tswj hwm qhov chaw zoo tshaj plaws raws li hom khoom: qhov kub qis rau cov khoom tshiab/khov, qhov chaw qhuav, muaj cua nkag zoo rau cov khoom qhuav, thiab ua kom lub tsev rau khoom huv si ntawm cov kab tsuag.
Cov Teeb Meem thiab Cov Lus Qhia ntawm Kev Txhim Kho Technology
Saib mus tom ntej, thev naus laus zis nuv ntses yuav ntsib teeb meem ntawm kev ruaj khov, kev xav tau ntawm kev ua lag luam, thiab kev hloov pauv huab cua. Cov kev tsim kho tshiab suav nrog kev ua cov khoom siv uas tsis ua rau ib puag ncig puas tsuaj, kev siv cov khib nyiab mus rau hauv cov khoom muaj nqis, kev siv cov thev naus laus zis tsis yog thermal (piv txwv li, siab siab), thiab kev siv digital ntawm cov saw hlau kom tswj tau qhov taug qab. Ntxiv mus, kev kawm rau cov neeg siv khoom thiab cov lag luam me yog qhov tseem ceeb rau kev siv cov qauv zoo thiab kev nyab xeeb ntawm cov zaub mov kom ncaj ncees dua.
Kev kaw
Cov hauv paus ntawm kev siv tshuab nuv ntses tsom mus rau cov ntsiab cai ntawm kev tswj kom tshiab, ntev lub sijhawm khaws cia, nce tus nqi ntxiv, thiab ua kom muaj kev nyab xeeb ntawm cov zaub mov. Txij li kev tuav thiab khaws cia tom qab sau qoob loo, kev ua tiav, mus rau kev ntim khoom thiab kev faib tawm, txhua theem yog sib txuas. Nrog kev siv tshuab kom raug thiab sib xws, cov khoom nuv ntses tsis yog tsuas yog qhov chaw muaj protein zoo xwb tab sis kuj yog cov khoom lag luam zoo tshaj plaws uas tuaj yeem txhim kho kev noj qab haus huv hauv zej zog thiab txhawb kev ruaj ntseg zaub mov.
