Kemiallinen koe Mukava positiivinen vakava mies yllään suojalasit ja pitämällä koeputki tehdessään kemiallisen kokeen - Kuvapankin valokuva ja kuva

Professional chemist. Smart nice male researcher wearing a mask and protective glasses while conducting chemical experiment in the lab

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

Chemical lab. Selective focus if test tubes standing on the table with a handsome professional chemist working in the background

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

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

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

My research. Serious brunette male lab assistant posing in profile while looking in microscope and studying sample

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

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

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

In the lab. Joyful positive nice boy looking into the microscope and smiling while being curious about science

Scientific challenge. Pleasant handsome male laboratorian dressing in safety glasses while elevating vial and gazing at it

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