Felice scienziato barbuto anziano in tubo di tenuta cappotto bianco con reagente in laboratorio chimico - Foto e immagini stock

Happy senior bearded scientist in white coat holding tube with reagent in chemical laboratory

Saint-Petersburg, Russia - July 8, 2013: National Centre for the control and quality of goods and services. Chemical laboratory for testing food. Chemist laboratory produces edible oil analysis

Portrait of a scientist in his laboratory

Senior male researcher carrying out scientific research in a lab using a gas chromatograph (shallow DOF; color toned image)

Cheerful elderly veterinarian holding needle for injection. Doctor with gray hair and beard wearing in white medical uniform and blue gloves. Assistant standing near patient, holding folder.

Favorite work. Earnest male dentist looking at camera while wearing glasses

Portrait of smiling scientist with hands on table looking at camera in laboratory

Happy senior bearded scientist in white coat holding tube with reagent in chemical laboratory

Portrait of smiling scientist with hands on table looking at camera in laboratory

Smiling senior bearded scientist in white coat holding tube with reagent in chemical laboratory

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

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

Happy grey haired scientist celebrating success of scientific experiment and holding flask with reagent

Happy grey haired scientist in lab coat holding flask with reagent

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

Serious grey haired scientist in lab coat looking at camera with arms crossed