Solutions for use in samples for microscopes for scientific and research use, namely, potassium ferrocyanide, chemicals in the nature of buffer and standard solutions, chemical preparations, surfactants, amino acids, buffer solutions, sugars, salts; solutions for use in biological samples for microscopes for scientific and research use, namely, potassium ferrocyanide, chemicals in the nature of buffer and standard solutions, chemical preparations, surfactants, amino acids, buffer solutions, sugars, salts; solutions for use in assay samples for microscopes for scientific and research use, namely, potassium ferrocyanide, chemicals in the nature of buffer and standard solutions, chemical preparations, surfactants, amino acids, buffer solutions, sugars, salts | Testing, inspection, analysis and research of samples using a microscope; testing, inspection, analysis and research of biological samples using a microscope; testing, inspection, analysis and research of assay samples using a microscope; preparation of samples for microscopes for research purposes; preparation of biological samples for microscopes for scientific analysis and research purposes; preparation of assay samples for microscopes for testing and analysis in research laboratories
