Kev Taw Qhia Kawm tiav pipettes yog cov cuab yeej tseem ceeb hauv chav kuaj thoob ntiaj teb, qhov tseem ceeb rau kev ntsuas qhov tseeb thiab hloov cov kua dej. Txawm hais tias koj tab tom ua haujlwm hauv chemistry, biology, lossis chaw kuaj mob, kev nkag siab txog cov nuances ntawm kev kawm tiav pipettes yog qhov tseem ceeb rau kev ua kom raug thiab ua tau zoo hauv koj qhov kev sim. Phau ntawv qhia no muab cov ntsiab lus ntxaws ntxaws ntawm cov pipettes tiav, suav nrog lawv hom, nta,

Taw qhia Hauv lub ntiaj teb ntawm kev sim ntsuas, qhov tseeb thiab qhov tseeb yog qhov tseem ceeb. Ib qho ntawm cov cuab yeej tseem ceeb siv hauv kev kuaj ib puag ncig thiab dej khib nyiab yog Biochemical Oxygen Demand (BOD) lub raj mis. Cov fwj tshwj xeeb no ua lub luag haujlwm tseem ceeb hauv kev ntsuas cov pa oxygen uas siv los ntawm cov kab mob thaum lub sij hawm decomposition ntawm cov organic teeb meem hauv dej. Tab sis