analysis
analyzing
biotechnology
chemical
chemist
chemistry
computer
contaminated
contamination
dropper
ecology
environment
equipment
exam
examining
experiment
finger
flask
fresh
glassware
issue
lab
laboratory
laptop
man
medicine
microbes
microscope
notebook
pipette
pointing
pollutant
pollution
problem
research
researcher
sample
science
scientific
scientist
sewage
student
studying
test
testing
tools
tube
virus
waste
water