Cov khob ntawv pov tseg yog ib qho chaw ua haujlwm staple uas txhua tus paub; Txawm li cas los xij, ntau tus neeg tsis paub tias lawv yeej muaj lub neej txee. Thaum yuav lawv, cov neeg siv khoom feem ntau tsom mus rau qhov zoo, tus nqi, thiab hom, feem ntau saib txog hnub tas sij hawm.
Thaum lub sij hawm tsim khoom, ib zaj duab xis polyethylene yog siv rau sab hauv ntawm lub khob kom nws dej- tiv taus. Cov yeeb yaj kiab no muaj qhov txwv lub neej; Thaum lub sij hawm tas sij hawm tsis pom ntawm qhov muag liab qab, nchuav hauv dej kub tuaj yeem ua rau cov yeeb yaj kiab degrade thiab hloov mus rau carbonyl compounds. Thaum cov tshuaj no tsis muaj kev phom sij rau kev noj qab haus huv hauv chav- dej kub, lawv tuaj yeem tso cov khoom tsis zoo thaum raug dej kub.
Qee tus yuav nug, "Puas txhais tau tias nws muaj kev nyab xeeb yog tias kuv tsis siv dej kub?" Tsis tas li. Txawm hais tias lub khob qhov zoo ntawm cov txheej txheem tseem zoo li qub tom qab tas sij hawm, kev cia ntev ntev tuaj yeem ua rau muaj plua plav thiab kab mob. Yog li ntawd, nws yog qhov zoo tshaj kom tsis txhob siv cov khob uas siv tas sij hawm.
Kuv kuj xav ceeb toom rau txhua tus kom kuaj xyuas cov chaw tsim khoom, hnub tsim khoom, thiab hnub tas sij hawm thaum yuav cov khob pov tseg, nrog rau tshuaj xyuas lub ntim rau kev puas tsuaj thiab lub khob rau cov ntxhiab tsw txawv txawv.
Tau kawg, muaj lwm cov ntsiab lus los txiav txim siab txog kev siv cov khob pov tseg. Piv txwv li, nws yog qhov zoo tshaj kom tsis txhob rov qab siv tib lub khob dua, tshwj xeeb tshaj yog nyob rau hauv cov chaw pej xeem. Txij li kev nyiam huv ntawm cov khob no tsis tuaj yeem lav tau, kev siv rov qab ntau zaus tuaj yeem ua rau muaj kev pheej hmoo kis kab mob.
Tsis tas li ntawd, peb yuav tsum nco ntsoov txog lub khob lub load -cov kabmob muaj peev xwm. Txawm hais tias tsim los kom yooj yim, cov kua dej hnyav lossis cov khoom noj tuaj yeem tso siab rau lub khob, ua rau nws tawg lossis deform. Qhov no tsis tsuas yog ua rau tsis yooj yim tab sis kuj tuaj yeem ua rau muaj teeb meem kev nyab xeeb.
Thaum kawg, peb yuav tsum xav txog qhov cuam tshuam ib puag ncig. Thaum cov khob pov tseg tau yooj yim, lawv cov kev siv dav dav ua rau muaj kev cuam tshuam rau ib puag ncig. Thaum twg los tau, xav txog kev siv cov khoom siv rov qab siv dua -xws li iav lossis ceramic khob- txhawm rau txo koj cov hneev taw ib puag ncig. Txhua yam, thaum lub khob ntawv pov tseg yog ib qho chaw ua haujlwm tseem ceeb hauv peb lub neej niaj hnub, peb yuav tsum tau ua tib zoo saib xyuas cov khoom xws li lawv lub txee lub neej, kev nyiam huv, kev thauj khoom- muaj peev xwm, thiab kev cuam tshuam ib puag ncig. Tsuas yog los ntawm kev ua li ntawd peb tuaj yeem txaus siab rau qhov yooj yim uas lawv muaj thaum tiv thaiv peb txoj kev noj qab haus huv thiab tiv thaiv ib puag ncig.