An older professor showing younger female student liquid filled glass beaker in chemical laboratory. Both teacher and student are dressed in protective lab safety equipment, and are looking at camera smiling.
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Tags:
- 30s
- 50s
- adults
- caucasian
- chemist
- chemistry
- conical flask
- discovery
- doctor
- glass
- happiness
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- holding
- horizontal
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- liquid
- looking at camera
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- mature man
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- photo
- portrait
- professor
- protective eyeglass
- red
- safety glasses
- sample
- science and technology
- scientific experiment
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- smiling
- solution
- stock
- student
- study
- teacher
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- test tube
- testing
- toothy smile
- treatment
- two people
- university
- woman
- young woman
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