Зрілий працівник, що проводить хімічний експеримент - Стокове фото та зображення

Attentive mature scientist dripping reagent into a test tube

Smiling man scientist in eyeglasses holding molecular model in lab

Scientist looking at a test tube

Mature man mixing chemical liquids

Mature male scientist examining liquid in erlenmeyer flask

Senior chemist or researcher analysis chemical laboratory

Need to take decision. Confident bearded man pressing lips and being very serious while working with microscope

Senior scientists working in lab

Portrait mature man holding test tube at laboratory

Mature engineer working in laboratory

Scientist checking a solution in conical flask

Research worker doing experiments with chemical liquid at laboratory

Male worker in lab glasses

Male researcher holding a test tube

Portrait of a microbiological laboratory test

Concentrated male researcher holding a test tube

Man checking a liquid through a magnifying glass

Man in the laboratory with flasks

Close up of laboratory researcher