Χαμογελαστά ανώτερος γενειοφόρος επιστήμονας σε λευκό παλτό κρατώντας σωλήνα με αντιδραστήριο με χημικό εργαστήριο - Φωτογραφίες & Εικόνες Αρχείου

Excited bearded chemist holding test tube with reagent and gesturing

Investigator checking test tubes

Happy mature scientist in lab coat holding flask with reagent at laboratory

Male scientist dropping liquid into a beaker

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

Happy man holding a test-tube at the laboratory

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

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

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

Scientist with equipment and science experiments, laboratory glassware containing chemical liquid for research or analyzing a sample into test tube in laboratory.

Happy chemist in lab coat holding tubes at laboratory

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

Caucasian smiling chemist in uniform working in lab and looking at tube with reagent in chemical lab

Beautiful young scientist holding flasks with reagents and smiling at camera

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

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

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

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

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

Pensive scientist in lab coat looking at tube at laboratory

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