Uważny dojrzały naukowiec kapiący odczynnik do probówki - Zdjęcie stockowe & obraz

Senior chemist or researcher analysis chemical laboratory

Male lab technician concentrating doing medical research

Senior scientists working in lab

Mature lab worker conducting a chemical experiment

Senior scientist analysing flask and test-tube

Mature man mixing chemical liquids

Mature male student holding a flask in lab

Cheerful senior chemist working in lab

Portrait mature man holding test tube at laboratory

Smiling man scientist in eyeglasses holding molecular model in lab

A laboratory pipette with drop

Smart scientist man tests liquid substance in test tube

Two specialist studying a file

Doctor is hand washing at the hospital

Senior doctor reading medical record

Man doing research in a lab

Scientist documenting the observation

Young male scientist doing experiments in laboratory

Mature doctor examining a document