Ключевые слова: abstract, atom, background, bio, biology, black, chemical, chemistry, concept, connection, design, dna, element, flat, genetic, genetics, geometric, graphic, icon, illustration, isolated, line, logo, medical, medicine, model, molecular, molecule, network, object, outline, particle, physics, pictogram, reaction, research, science, shape, sign, simple, single, stroke, structure, symbol, technology, web, white,