Ключевые слова: 70s, biochemist, biochemistry, biology, biotechnology, caucasian, cellular, cheerful, chemist, chemistry, computer, desk, elderly, equipment, examining, happy, healthcare and medicine, indoors, lab, lab coat, laboratory, looking at camera, male, man, medical, medical research, medicine, microscope, microscopic, portrait, science, scientific experiment, scientist, senior, sitting, smiling, studying, technology, using, white hair, working,