Mbale zing'onozing'ono zimagwiritsidwa ntchito posungira ndi kugawira mankhwala amadzimadzi kapena zodzoladzola. Mbalezi nthawi zambiri zimapangidwa ndi galasi kapena pulasitiki ndipo zimakhala ndi zotsitsa zomwe zimakhala zosavuta kuzilamulira kuti madzi azidontha. Amagwiritsidwa ntchito kwambiri m'magawo monga mankhwala, zodzoladzola, ndi ma laboratories.