male scientist is working with dangerous and toxic chemicals in chemical laboratory, using protective dress, mask and gloves
medical expert is testing toxic medicament in laboratory, dressed in protective gown and respirator mask, development of new drug
scientific laboratory of development of bacteriological and biological weapon, technician is dressed protective gown
male chemist specialist dressed PPE suit is working with toxic chemicals in laboratory, dropping reagent in tube
Woman working in laboratory. Chemist working with glass flask. Researcher doing chemical test. Chemical experiment. Scientific research in chemistry laboratory. Female chemist. Laboratory equipment
Chemists in protective gear studying chemical reactions.
Woman chemist working on computer in science laboratory, using technology to develop microbiology experiment with lab equipment. Scientist with protective glasses. Handheld shot
Chemist in protective clothing pouring reagent into Petri dish, scientist running an experiment and doing research in laboratory
development of biological weapon in medical laboratory, male scientist in protective gown is viewing bacteria and virus by microscope
Scientist in white coverall and protective glasses working with sample tubes in modern and secret laboratory space
Medium long of busy multiethnic scientists wearing medical gowns, masks and gloves, working and talking in laboratory at daytime
scientist is experimenting in chemical laboratory with dangerous reagents, dropping liquid by pipet in plate