Cientista barbudo sênior pensativo em casaco branco olhando para tubo com reagente em laboratório químico - Banco de fotos e imagens

Pensive senior bearded chemist in white coat holding tube with reagent in chemical laboratory

Smiling senior bearded scientist in white coat holding tube with reagent in chemical laboratory

Thoughtful senior bearded chemist in white coat in chemical laboratory

Portrait of focused scientist looking at hand through magnifying glass in laboratory

Portrait of tired senior scientist sitting at workplace and looking at camera

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

Excited bearded chemist holding test tube with reagent and gesturing

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

Concentrated bearded scientist working with microscope in laboratory

Concentrated bearded chemist in goggles with reagents in tubes in laboratory

Concentrated bearded scientist working with microscope in laboratory

Pensive bearded scientist working with microscope in laboratory

Concentrated bearded scientist working with microscope and laptop in laboratory

Concentrated bearded scientist working with microscope and laptop in laboratory

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

Concentrated bearded scientist working with microscope and laptop in laboratory