Químico barbudo sênior pensivo no tubo de retenção do revestimento branco com reagente no laboratório químico - Banco de fotos e imagens

Pensive senior bearded scientist in white coat looking at tube with reagent in chemical laboratory

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

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

Thoughtful senior bearded chemist in white coat in chemical laboratory

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

Concentrated senior bearded scientist in white coat writing in clipboard on tanle with flasks in chemical laboratory

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

Mature male student holding a flask in lab

White hair scientist thinking about chemistry formulas . Knowledge and creativity

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

Concentrated bearded chemist in goggles with reagents in tubes in laboratory

Pensive scientist in lab coat looking at tube at laboratory

Happy chemist in lab coat holding tubes at laboratory

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

Concentrated bearded scientist working with microscope in laboratory

Pensive bearded scientist working with microscope in laboratory

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

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