A scientist explaining content in test tubes on a white wall
A young scientist examining a test tube with a colorful substance
male scientist comparing two samples of virus in test tubes wearing biohazard suit
A scientist holding two test tubes, the result of water hardness test, one good and one bad result
In modern research center two scientists are talking about a sample from a tube
Biologist scientist putting solution liquid in test tube
A scientist in a lab putting some chemicals into a test tube due to test the hardness of the water
Medical research scientist conducts DNA test experiment using test tubes 4K
scientist in protection suit holding test tube of covid-19
Medium view through glass wall in research center of two scientists wearing hazmat suits, gloves and medical masks, sitting at desk, working with chemicals in test tubes
close-up of scientist in protection mask and glasses holding two test tubes with samples of pink and blue colors
Group of international scientist working with chemicals uses microscope and test tubes