Kuv yuav ua li cas kom tsis txhob lub qe tig ntsuab thaum ua noj?

Yuav kom tsis txhob lub qe qe los ntawm tig ntsuab thaum boiling:

• khaws cov dej ntawm qhov kub kub los yog qis dua kub kub kom tsis txhob overheating
• siv lub lauj kaub loj thiab khaws cov qe hauv ib txheej
• tua hluav taws thaum dej nce mus txog qhov kub thiab txias
• tsis txhob cia cov qe hauv dej ntev dhau; 10-12 feeb yog txaus rau nruab nrab qe
• txias cov qe nrog dej txias tam sim ntawd tom qab ua noj kom tsis txhob muaj tshuaj lom neeg tig lub yolk ntsuab

Qhov tseem ceeb yog ntxiv kom sov txaus kom lub qe tawv, tab sis tsis ntau heev kom nws tig ntsuab.

Dab tsi yog cov txheej txheem tshuaj ua tiav uas hloov lub qe qe ntsuab thaum ua noj dhau lawm?

Ob peb cov txheej txheem biochemical nthuav tshwm sim ua ntej cov hlau tuaj yeem hnov ​​​​mob nrog cov leej faj kom tig lub qe qe ntsuab.

Cia wb mus hla lawv ib kauj ruam.

Hlau nyob rau hauv lub qe qe

Ib tug qaib qe qe muaj 2.7% ntawm cov hlau, uas yog ib qho tseem ceeb rau lub embryo. 95% ntawm cov hlau yog khi rau phosvitin, protein nyob rau hauv lub qe qe.

Thaum lub embryo pib loj hlob, cov hlab ntsha loj hlob mus rau hauv lub yolk kom tau txais cov as-ham.

Cov ntshav muaj cov qe ntshav liab uas siv hlau nqa oxygen mus rau cov menyuam qaib.

Tus menyuam qaib hauv plab yog qhov ua pa oxygen hauv lub qe. Cov pa oxygen yog los ntawm cov pores me me hauv lub qe. Ib qho qauv qaib qe muaj ntau tshaj 7000 pores rau oxygen kom dhau mus.

Sulfur nyob rau hauv lub qe dawb

Peb txhua tus paub leej faj raws li nws yog lub luag haujlwm rau tus ntxhiab tsw ntawm cov qe lwj.

Lub qe dawb zaum nyob ib ncig ntawm lub yolk ua ib txheej tiv thaiv uas tua cov kab mob tuaj. Nws puv nrog dej thiab proteins. Ntau tshaj li ib nrab ntawm cov qe dawb muaj cov protein ovalbumin, cov protein uas muaj cov pab pawg sulfhydryl dawb uas muaj leej faj.

Cysteine

Cov qe proteins yog cov saw ntev ntawm cov amino acids. Feem ntau ntawm cov leej faj nyob rau hauv cov qe qaib muaj nyob rau hauv qhov tseem ceeb amino acid methionine, ib tug precursor ntawm cov amino acid cysteine.

Hauv tib neeg, cysteine ​​​​ ua lub luag haujlwm tseem ceeb hauv kev zom cov cawv. Nws tau dhau los ua neeg nyiam nyob rau xyoo 2020 thaum cov kws tshawb fawb pom tias cysteine ​​tuaj yeem txo cov tsos mob ntsig txog cawv, xws li xeev siab thiab mob taub hau. Cov sulfur-muaj cysteine ​​nyob rau hauv qe kho hangovers.

Cua sov lub qe

Thaum lub qe txias, lub vitelline daim nyias nyias yog ib qho barrier uas ua rau cov tshuaj nyob rau hauv lub yolk cais los ntawm lub qe dawb. Tab sis thaum koj pib ua lub qe, ob peb yam khawv koob tshwm sim.

Ua ntej ntawm tag nrho cov, tshav kub ua rau cov proteins nyob rau hauv lub qe nyoos unfold thiab tsim tshiab bonds rau ib leeg. Cov txheej txheem no hu ua denaturation thiab yog vim li cas lub qe ua nyuaj thaum koj boil nws.

Vim yog tag nrho cov untangling, sulfur yog tso tawm los ntawm cov amino acids. Nws pib tsim hydrogen sulfide, roj uas tsw zoo li cov qe lwj. Peb muaj hmoo nws yog ib qho me me ntawm cov pa, lossis peb yuav tsis noj qe, puas tau.

Peb txhua tus paub tias muaj dab tsi tshwm sim nrog dej qab zib yog tias peb tso nws nyob rau hauv lub hnub ntev dhau lawm: cov pa tawm. Tib yam tshwm sim nrog hydrogen sulfide, nws sim khiav tawm ntawm lub qe-dawb. Tsis muaj ntau qhov chaw rau cov roj mus, yog li nws sim diffuse mus rau hauv lub qe qe.

Thaum koj sov lub qe ntev txaus thiab nyob rau hauv qhov kub thiab txias, txwv tsis pub muaj zog phosvitin proteins nyob rau hauv lub yolk pib zom los ntawm hydrolysis. Cov phosvitin tsis tuaj yeem tuav cov hlau, thiab cov hlau tso rau hauv cov qe.

Hlau reacting nrog Sulfur

Cov hlau (Fe) los ntawm cov yolk ntsib cov sulfur (S) los ntawm lub qe dawb ntawm lub yolk lub ntug, qhov twg cov vitelline membrane poob sib nrug. Cov tshuaj tiv thaivtsim ferrous sulfide(FES).

Ferrous sulfide yog xim dub-xim hlau sulfide uas zoo nkaus li ntsuab thaum sib xyaw nrog cov qe daj. Qhov kawg tshwm sim yog lub ntsuab-dub discoloration koj tau txais nyob rau hauv lub hard-siav qe.

Qee qhov chaw hais tias ntsuab yog ferric sulfide, tab sis qhov ntawd yog cov khoom siv tsis ruaj khov uas tsis tshwm sim hauv qhov xwm txheej thiab lwj hauv ferrous sulfide.

Yam dab tsi ua rau muaj kev pheej hmoo ntawm lub qe qe tig ntsuab?

Qhov kev pheej hmoo rau grey-ntsuab discoloration ntawm lub qe yolk nce thaum:

• lub qe yog siav ntawm kub heev
• lub qe yog rhuab rau lub sij hawm ntev
• lub qe yog khaws cia ntev ua ntej ua noj
• lub qe qe muaj pH siab
• koj ua cov qe hauv lub lauj kaub hlau

Cov qib pH ntawm qe nce thaum lub qe loj tuaj. Cov pH tuaj yeem hloov mus rau cov txiaj ntsig alkaline, nrog carbon dioxide tawm hauv lub qe ob peb hnub. Qhov no ua rau muaj kev pheej hmoo ntau ntxiv uas cov yolks hlau reacts nrog lub qe dawb cov sulfur.

Txij li thaum hlau tig lub qe ntsuab, nws yog qhov zoo dua kom tsis txhob ua noj rau hauv lub lauj kaub hlau cam.

Cov nqaij qaib, qe loj, qe xim, thiab qe zoo tsis cuam tshuam rau cov xim ntsuab ntawm cov yolk.

Cov ntsiab lus

Lub grey-ntsuab discoloration ntawm lub qe yolk nyob rau hauv tawv-boiled qe yog tshwm sim los ntawm overcooking. Lub tshav kub ua rau cov hlau nyob rau hauv lub qe yolks react nrog cov sulfur nyob rau hauv lub qe dawb. Qhov tshwm sim tsaus ferrous sulfide zoo li ntsuab nyob rau sab saum toj ntawm lub qe qe daj.

Txhawm rau kom tsis txhob muaj xim ntsuab, nws yog ib qho tseem ceeb los tiv thaiv cov hlau hauv cov yolk los ntawm kev tso tawm. Txo cov dej kub thiab xyuas kom lub qe tsuas yog rhaub kom ntev txaus kom nws nyuaj. Tam sim ntawd txias nws nrog dej txias tom qab ua noj.