Experimento controlado. Inyección de cintura hacia arriba de un trabajador de laboratorio experimentado sosteniendo una pipeta mientras agrega líquido químico en un tubo de ensayo . - Foto e imagen de stock

Competent scientist. Confident practitioner looking attentively at pipette while adding some drops of reagent while waiting for reaction

Attentive process. Selective focus on a test tube with a blue chemical liquid and a pipette held by a mature lab worker conducting a chemical experiment.

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.

No right for mistake. Selective focus on a test tube with navy blue chemical liquid held by a lab professional conducting chemical experiment.

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

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

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

Supportive relations. Selective focus on a male scientist standing next to his colleague while pouring chemical liquid into a test tube and conducting a chemical experiment.

Thoughtful researcher. Attentive bearded scientist wrinkling his forehead while looking at pink liquid

Close to hand. Delighted scientist opening his mouth and wearing protective glasses while looking at chemical reagent

Blood analysis. Concentrated female person raising hand while looking at test tube

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

Young assistant. Attentive brunette woman wearing protective glasses while checking reagent

Shake it. Delighted practitioner keeping mouth opened and raising both hands while doing reagent exam