Professeur et étudiant souriant regardant la fiole avec réactif en laboratoire chimique - Photo & image de stock

Smiling teacher and student looking at flask with reagent in chemical laboratory

Teacher and student scientists in protective glasses making experiment in lab

Adult scientist and girl in goggles mixing reagents in tubes in laboratory

Female Pupil And Teacher Conducting Chemistry Experiment

Teacher and student scientists in protective glasses working in chemical lab

Education, science, chemistry and children concept - kids or students with test tube making experiment at school laboratory

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

Smiling middle aged scientist in protective eyewear working with microscope and colleague standing behind

Smiling chemist in white coat holding test tubes with reagents and making experiment

Professional chemists in uniform working in lab with computer mouse and keyboard

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

Attractive middle aged scientist working with microscope in chemical lab

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

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

Smiling scientists in protective eyeglasses working together in lab and pointing at camera

Close-up view of professional scientist holding test tube with reagent in lab