Processus attentif. Concentration sélective sur une éprouvette avec un liquide chimique bleu et une pipette tenue par un travailleur de laboratoire mature effectuant une expérience chimique . - Photo & image de stock

It is all about proportions. Waist up shot of a mature gentleman wearing a lab coat concentrating his attention on a pipette while adding a chemical liquid into a test tube.

Visit our lab. Delighted scientist keeping smile on his face and raising eyebrows while examining blue liquid

Sterile instrument. Positive delighted practitioner keeping smile on his face and holding test tube while taking sample of blue liquid

Controlled experiment. Waist up shot of an experienced laboratory worker holding a pipette while adding chemical liquid into a test tube.

Biological engineering. Serious handsome male biologist standing in the lab and looking at the test tube while conducting a biological experiment

Scientists team. Positive professional smart scientists standing together and conducting the experiment while working in team

Biological test sample. Selective focus of a test tube being held by a nice smart professional scientist while taking a biological test sample

Accurate observation. Professional biologist working in a lab and holding a test tube

Biological tests. Selective focus of a test sample of the liquid being used in biological research

Modern agro engineering. Nice smart man pointing at the test tube while working in the agro engineering laboratory

Feel the progress. Delighted male person keeping smile on his face, keeping glass in left hand while pouring down some liquid

Chemical expertise. Attentive mature scientist wrinkling his forehead while looking at test tube

Light room. Very attentive brunette keeping smile on her face while holding test-glass in left hand and going to checking it up