analysis
analyzing
biochemistry
biotechnology
bottle
bottled
chemical
chemist
chemistry
clean
contaminated
contamination
control
discovery
drink
exam
examining
experiment
expertise
filtered
fresh
healthcare
lab
laboratory
liquid
looking
man
medical
medicine
microbes
microbiology
microscope
pollutant
pollution
quality
research
researcher
sample
scientific
scientist
student
studying
substance
taking
test
testing
toxic
tube
virus
water