Ключевые слова: analysis, background, bacteria, biology, biotechnology, blue, care, chemical, chemistry, clean, cleanliness, development, equipment, experiment, finger, glass, glassware, hand, healthcare, healthy, hospital, hygiene, hygienic, icon, industry, laboratory, liquid, medical, medicine, microbiology, modern, personnel, pharmaceutical, pharmacology, rennet, research, science, scientific, scientist, skin, soap, technology, test, toxic, tube, wash, washroom, water, wet, white,