Silencio. Hombre barbudo atento arrugando su frente y presionando los labios mientras mira hacia adelante en la pipeta - Foto e imagen de stock

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

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

My colleague. Positive delighted female keeping smile on her face and crossing arms while standing opposite scientist

Keeping in a right proportion. Scaled up look on female lab worker holding a test tube and using a pipette while pouring blue chemical liquid during an experiment.

It is about proportions. Waist up shot of lab colleagues smiling while holding a test tube and adding chemical liquid during an experiment.

Add some reagent. Charming lab assistant keeping smile on face and looking at test tube while working in the laboratory

Female laboratory assistant analyzing a blood sample at hospital. Medicine, health care and researching concept.

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.

Orange filter. Attentive male person having mask on face and wrinkling forehead while treating his patient

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

How interesting. Concentrated blue-eyed researcher of middle age wearing a uniform and a medical face mask and gloves and holding a sample in from of his face and looking at it

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

Portrait of a virologist holding a pair of test tubes with reagents in his hands

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