Ritratto di scienziato anziano stanco seduto sul posto di lavoro e guardando la macchina fotografica - Foto e immagini stock

Portrait of smiling scientist holding bottles with reagents in hands in laboratory

Scientist using microscope while colleague holding reagent in tube in lab

Portrait of smiling scientist with hands on table looking at camera in laboratory

Happy grey haired scientist in lab coat holding flask with reagent at laboratory

Scientist using microscope while colleague holding reagent in tube in lab

Thoughtful senior bearded chemist in white coat in chemical laboratory

Grey haired scientist sitting and looking at camera while woman working at laboratory

Bearded chemist in goggles with reagents in tubes and tablet in laboratory

Concentrated bearded chemist in goggles with reagents in tubes in laboratory

Portrait of excited scientist working with reagent in flask in laboratory

Bearded chemist in goggles with reagents in tubes and tablet in laboratory

Portrait of smiling scientist working with reagent in flask in laboratory

Adorable little girl in goggles with reagents in tubes in laboratory

Bearded chemist in goggles with reagents in tubes and tablet in laboratory

Pensive scientist in lab coat looking at tube at laboratory

Portrait of smiling scientist using microscope while working with reagents in lab

Concentrated bearded chemist in goggles with reagents in tubes in laboratory