Afroamerykanin pracujący w laboratorium. Lekarz prowadzący badania mikrobiologiczne. Narzędzia laboratoryjne: mikroskop, probówki, sprzęt. Biotechnologia, chemia, bakteriologia, wirusologia, DNA i - Materiał filmowy & wideo

Male scientist in lab. Close up of scientist man looking at liquid in glass flask at laboratory. Scientist analyzing substance in flask. Scientist working with liquid at research laboratory

Scientist working in lab. Concentrated scientist face. Researcher using pipette in laboratory. Laboratory worker conducting chemical research in lab. Scientist in lab. Chemist focused on work

Scientist face. Portrait of researcher working in safety glasses. Laboratory worker face. Laboratory man focused on work. Concentrated lab worker working with chemical liquids in glass flask at lab

Scientist and his assistant working in lab. Doctor teaching intern to make analyzing research. Laboratory tools: microscope, test tubes, equipment. Biotechnology, chemistry, bacteriology, virology

Scientist working in lab. Doctors making medical research. Laboratory tools: microscope, test tubes, equipment. Biotechnology, chemistry, science, experiments and healthcare concept. Day light and

Scientist working in lab. Doctors making medical research. Laboratory tools: microscope, test tubes, equipment. Biotechnology, chemistry, science, experiments and healthcare concept. Day light and

Scientist and his assistant working in lab. Doctor teaching intern to make analyzing research. Laboratory tools: microscope, test tubes, equipment. Biotechnology, chemistry, bacteriology, virology