Ключевые слова: analysis, analyzing, antibacterial, bottle, checking, chemical, chemist, chemistry, cleaner, cleaning, demonstrating, detergent, discovery, discussing, dish, doctor, examining, experiment, experimenting, expertise, explaining, fluid, foam, glassware, hygiene, lab, laboratory, liquid, making, man, mixing, old, petri, presenting, quality, research, researcher, sample, scientific, scientist, showing, soap, softener, solution, test, testing, toilet, tube, wash, washing,