Científico barbudo senior concentrado en la escritura de la capa blanca en portapapeles en tanle con frascos en laboratorio químico - Foto e imagen de stock

Close-up portrait of bearded senior scientist working with microscope and looking at camera

Senior chemistry professor/doctor in a lab (color toned image)

Senior chemistry professor/doctor in a lab (color toned image)

Mature lab worker conducting a chemical experiment

Professional chemists in white coats working with microscopes in laboratory and looking at camera

Senior chemistry professor/doctor in a lab (color toned image)

Concentrated bearded chemist in goggles with reagents in tubes in laboratory

Smiling chemist in protective eyeglasses holding test tube with reagent in lab

Professional scientist in protective eyeglasses making experiment with reagents in test tubes

Concentrated bearded scientist working with microscope and laptop in laboratory

Concentrated bearded scientist working with microscope and laptop in laboratory

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

Bearded teacher holding flask while little student looking in microscope

Concentrated bearded scientist working with laptop in laboratory