Bacterial culture. Hand placing a lid on a petri dish containing a bacterial culture. These petri dishes are filled with different coloured agar nutrient media on which bacteria are grown. Lines of bacteria have grown on the orange agar where they were streaked. This involves running a platinum wire loop that has been placed in contact with a bacterial culture over the agar. By heating the loop,each successive set of streaked lines leaves fewer bacteria,until round colonies form around single bacteria,the dots at the upper left of the orange petri dish. This technique is used to isolate particular strains of bacteria,which may then be incubated and grown in pure form | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Tek Image |
Taille de l’image : | 4159 px × 4200 px |
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