Khoom noj khoom haus / zaub mov ntim kev lag luam
Gases yog dav siv nyob rau hauv cov zaub mov. Hais txog kev ntim khoom, nws tuaj yeem tiv thaiv cov khoom noj los ntawm oxidative deterioration thiab ua lub luag haujlwm hauv kev ua kom tshiab. Tsis tas li ntawd, cov pa roj carbon dioxide, uas yog cov khoom siv tseem ceeb ntawm cov dej qab zib, tuaj yeem txhim kho cov saj ntawm cov dej qab zib, uas yog ib qho ntawm cov laj thawj vim li cas ntau tus neeg yuav cov tshuab hluav taws xob hauv tsev.