Lab worker adds a few drops of a red chemical from a pipette to a petri dish
Lab technician adds a few drops of a red chemical from a pipette to a petri dish
medical research in laboratory, male scientific worker is mixing liquids in Petri dish, chemical and microbiological analysis
Lab worker pours chemicals from a test tube into a flask
Lab worker pours chemicals from a test tube into a flask
Lab worker sorts test tubes with chemicals
Scientist man using pipette in lab. Researcher with dropper working in laboratory. Scientist student working in lab. Lab worker using laboratory equipment. Laboratory scientist working with pipette