Tej zaum koj yuav xav tsis thoob thaum pom lub npe no. Puas yog cov neeg ua haujlwm hauv chav kuaj tshuaj tseem yuav tsum hnav khau tiv thaiv? Puas yog lawv tsis hnav khau zoo tib yam? Puas muaj qhov tshwj xeeb xav tau? Raws li rau lawv, nws yog ib qho tsim nyog rau lawv hnav khau tiv thaiv kev nyab xeeb, tab sis cov khau tiv thaiv lawv hnav yog cov khau tiv thaiv tshwj xeeb tsim nyog rau lawv hauv chav kuaj tshuaj.
Hauv chav kuaj tshuaj chemical, muaj ib pab pawg neeg hu ua chemical analysts. Lawv yog cov neeg uas txheeb xyuas, sib sau ua ke thiab sim nrog cov khoom siv rau kev txhim kho thiab siv cov khoom thiab cov txheej txheem, kev soj ntsuam kom muaj nuj nqis thiab kev txhim kho txoj kev ntsuas. Cov kev phom sij feem ntau koom nrog hauv cov chaw soj nstuam tshuaj yog qhov mob hnyav tshwm sim los ntawm ntau yam pa phem, kua thiab cov khib nyiab uas yuav raug tso tawm thaum lub sij hawm tshuaj tiv thaiv los yog cov qauv siv hauv kev npaj cov cuab yeej rau kev tshuaj xyuas.
Ntxiv rau cov khoom siv hluav taws xob (khoom, kua thiab roj) lossis cov tshuaj tiv thaiv exothermic uas tsis muaj kev tswj hwm thaum muaj kev sim tshuaj, qhov tshwm sim ntawm cov nplaim taws, qhov chaw kub lossis cov kua dej thiab cov roj kub tso tawm los ntawm kev tawg tuaj yeem ua rau kub hnyiab. Cov tshuaj uas muaj corrosive irritations tuaj yeem xau, thiab lwm yam, yog li nws yog qhov zoo dua rau lawv ua haujlwm hauv chav kuaj kom hnav cov khau tiv thaiv kev nyab xeeb. Cov khau kev nyab xeeb zoo li cas lawv hnav?
Rau kev sim tshuaj lom neeg ua haujlwm, cov kws tshuaj ntsuam xyuas tshuaj yuav tsum hnav cov hnab looj tes tiv thaiv tshuaj, zuag qhia tag nrho, kua qaub thiab alkali-resistant nkawm khau, tiv thaiv lub ntsej muag thiab tsom iav qhov muag. Thaum thauj cov khoom hnyav, lawv yuav tsum hnav khau kev nyab xeeb nrog kev tiv thaiv kev sib tsoo. Kev nyab xeeb lifting thiab txav khoom, siv lifting assisted mechanical tuav; kev nyab xeeb khau nrog cov khau tsis khaus yog tias tsim nyog; thiab cov cai tswj kev nyab xeeb tshuaj thaum tuav lossis siv tshuaj lom neeg, nyeem cov ntaub ntawv kev nyab xeeb cov ntaub ntawv rau cov khoom siv tshuaj lom neeg tshwj xeeb yuav tsum tau siv nrog kev saib xyuas.