Kua Nitrogen Frozen Foods - Zoo meej rau noj

Puas muaj kev nyab xeeb rau noj cov khoom noj khov hauv cov kua nitrogen? Nrog cov cuab yeej siv thiab cov txheej txheem tsim nyog, kua nitrogen khov ua kom muaj kev nyab xeeb tshwj xeeb thiab cov khoom noj khov zoo.

Cov khoom ntawm Liquid Nitrogen

Cov kua nitrogen yog los ntawm cov roj nitrogen, uas ua rau 78% ntawm cov huab cua peb ua pa thiab yog intrinsically inert, tsis muaj tshuaj lom, tsis muaj xim thiab tsw. Thaum lub sij hawm cryogenic liquefaction ntawm qhov kub tsis tshua muaj siab, nitrogen gas condenses rau hauv cov kua dej thaum khaws nws cov khoom muaj kev nyab xeeb rau cov khoom noj thiab tib neeg.

Raws li cov kua nitrogen evaporates thiab vents thaum lub sij hawm khov, nws tsis muaj toxicity los yog kab mob txaus ntshai. Nrog rau lub xeev cov kua dej kub ntawm -320 degree F (-196 degree), tsis muaj cov microbes uas tuaj yeem muaj sia nyob thiab nthuav dav hauv cov kua nitrogen lossis nws cov ntim. Koj tuaj yeem muaj kev ntseeg siab tag nrho hauv kev nyab xeeb ntawm cov kua nitrogen thiab cov khoom noj khov los ntawm nws qhov kub thiab txias.

Kev kub ceev ceev ceev

Lub freezers ua kua nitrogen ua haujlwm ntawm qhov kub qis qis qis mus rau -320 degree F (-196 degree ). Cov kab mob microbes uas muaj nyob rau ntawm cov khoom noj los yog cov thawv ntim khoom tam sim ntawd inactivated nyob rau hauv no cryogenic ib puag ncig. Ntxiv mus, tag nrho cov khoom noj yog khov tag nrho hauv feeb xwb, txwv tsis pub cov kab mob microbial hauv ib yam nkaus.

Nyob rau hauv sib piv, mechanical freezing los yog txias chav tsev cia nyob rau hauv ntau dua kub yuav siv sij hawm sij hawm los yog hnub kom khov zaub mov. Microbes txuas ntxiv nthuav dav thiab ua rau cov zaub mov tsis zoo thoob plaws lub sijhawm khov. Tsuas yog ultra-ceev cryogenic khov tam sim ntawd nres tag nrho cov microbial kev loj hlob thiab cov metabolism hauv kev nyab xeeb tag nrho cov khoom khov.

Khoom noj khoom haus qib
Peb lub freezers kua nitrogen siv #304 stainless hlau, uas tau pom zoo tshwj xeeb rau kev sib cuag zaub mov. Hom stainless hlau no paub txog nws zoo heev corrosion kuj, ua rau nws zoo tagnrho rau siv nyob rau hauv cov zaub mov ua daim ntaub ntawv. Tsis tas li ntawd, #304 stainless hlau tseem paub txog nws cov kav ntev, uas txhais tau hais tias nws tuaj yeem tiv taus qhov kev siv tsis tu ncua hauv peb lub freezers.

Ib qho ntawm cov txiaj ntsig tseem ceeb ntawm kev siv #304 stainless hlau hauv peb lub freezers yog tias nws tiv thaiv cov hlau leaching uas tuaj yeem ua rau cov khoom khov. Hlau leaching tuaj yeem tshwm sim thaum cov hlau qhov chaw nkag mus rau hauv cov kua nitrogen, uas yog corrosive heev. Yog tias cov hlau nkag mus rau hauv cov khoom khov, nws tuaj yeem cuam tshuam qhov zoo thiab kev nyab xeeb ntawm cov khoom.

Zoo tagnrho Core Temperatures

Kev khov rau qhov kub tsis tshua muaj siab xws li -18 degree inactivates microbes tag nrho txoj kev mus rau qhov chaw thiab tso cai rau kev ruaj ntseg mus sij hawm ntev. Rau cov khoom noj uas muaj cov plhaub sab nraud thiab qhov loj me, zoo li tag nrho cov durians, cov khoom siv lub freezers tsis tuaj yeem nkag mus rau hauv cov tub ntxhais, tawm hauv cov kab mob hauv lub cev uas tuaj yeem ua rau cov zaub mov tsis zoo.

Peb lub tshuab ua kua nitrogen ua kom zoo saib xyuas cov xwm txheej zoo li qhov ntsuas kub sab hauv kom ntseeg tau tias cov tub ntxhais mus txog qhov ua tiav microbial inactivation, txawm rau cov khoom nyuaj. Qhov no guarantees kev nyab xeeb thiab ntev txee lub neej yam tsis muaj chaw lwj.

Hauv cov ntsiab lus, cov khoom noj khov siv pebcov khoom siv kua nitrogenkhaws cov kev nyab xeeb thiab zoo tshaj plaws. Cov txheej txheem khov sai sai khaws cov tshiab thiab tshem tawm cov kab mob txaus ntshai. Tiv tauj peb hnub no kom paub ntau ntxiv txog peb cov kev daws teeb meem tshiab-khov zaub mov.