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Biological research. Positive smart male biologist holding a microscope and taking a test tube while conducting a biological research
Smiling bearded teacher and serious little student making experiment in lab
Happy scientists in white coats working with microscope in laboratory
Concentrated bearded scientist working with microscope in laboratory
In the scientific lab. Selective focus of scientist hand taking out of the test tube for the research
Biological research. Cheerful smart male scientist looking at the test tubes and smiling while working in the bio lab
Successful experiment. Cheerful positive smart scientist looking into the microscope and smiling while being happy with his research results
More samples. Merry gay male laboratorian grinning while getting vial and putting on safety glasses
Team of mature scientists working together in lab and looking at each other
Professional scientist in protective eyeglasses making experiment with reagents in test tubes
Smiling chemist in protective eyeglasses holding test tube with reagent in lab
Concentrated senior scientists in uniform looking at flask while his colleague working with microscope on foreground in lab
Caucasian smiling chemist in white coat working with microscope and reagents while in chemical lab
Professional chemists in white coats working with microscopes in laboratory and looking at camera
Caucasian scientist working with microscope while her colleague looking at flask behind in chemical laboratory
Side view of scientists in white coats working with microscopes in chemical lab
