Επαγγελματίας χημικός. Έξυπνος καλός άνδρας ερευνητής φορώντας μια μάσκα και προστατευτικά γυαλιά, ενώ διεξάγει χημικό πείραμα στο εργαστήριο - Φωτογραφίες & Εικόνες Αρχείου

Scientist working in the lab, in protective mask examines a test tube with liquid

Side view of young scientist in eyeglasses looking at test tube in research laboratory

Scientific project. Serious intelligent hard work holding a test tube and looking into the microscope while working on his project

Hard work. Professional appealing male laboratorian rising bulb while looking at it and wearing safety glasses and mask

Medical research. Delighted nice professional scientist holding a pill and looking at it while conducting medical research

Uneasy work. Professional skillful male lab assistant using reagent while performing experiment and touching microscope

Difficult task. Serious skillful male lab assistant wearing mask while touching microscope and conducting research

Modern science. Positive intelligent female scientist smiling and holing a test tube while working in the chemical lab

Scientific developments. Serious nice scientific researcher looking at the test tubes and taking one of them while working in the lab

Tough work. Ambitious focused male laboratorian looking in microscope while posing in profile and dressing in lab coat

Successful experiment. Selective focus of male hand carried vial filled with liquid and man putting on safety glasses and grinning