adult
analyzing
biology
biotechnology
caucasian ethnicity
chemical
chemist
chemistry
closeup
coat
discovery
doctor
document
education
equipment
examining
expertise
healthcare and medicine
holding
indoors
lab coat
laboratory
liquid
males
medical research
medical sample
medical test
medicine
men
microbiology
microscope
occupation
one person
people
professional occupation
protective glove
research
science
scientific experiment
scientist
technician
technology
tubing
working
writing
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