Ключевые слова: analysis, analyzing, biochemistry, biotechnology, blue, caucasian, chemical experiment, chemist, chemistry, compound, concentrated, curious, discovery, experimenting, flask, fluid, glassware, gloved, hazardous, holding, human, interested, liquid, male, man, medicine, people, person, pharmaceutical, pharmacy, professional, protective, reagent, researching, science, scientific, scientist, specimen, substance, test tube, tube, uniform, vertical, worker,