Histological dyes based on the oak bark and cherry tree extracts

Histological dyes were obtained from oak bark and cherry branches and their staining properties were studied. It was shown that new dyes are cytoplasmic and can be used for staining of histological specimens of different organs. The dye based on the oak bark stains the cytoplasm of cells in dark brown or black color and does not stain their nuclei. The dye obtained from cherry branches gives moderately rich green color to the cytoplasm of cells.