Impregnation

**Impregnation** (from Lat. im – prefix meaning “in, inside” and Lat. praegnans – covered with shells): * in biology – sequential processing of a layer of the object under study with a dye; * in crystallography – application of specially prepared solutions to the surface of a thin section;

|Type of impregnant | Impregnant solution density | Application of impregnation | | :------------------------| -------------:|--------------:| | Nitrates of silver, copper, iron, lead, mercury, etc. | 1.53—1.87 g/cm³ | Recommended for staining and obtaining diagnostic features of nuclear matter in the nuclei of eukaryotic cells.| | Strong aqueous solution of silver nitrate | 1.70 g/cc | For coloring organic substances. Impregn. capable of coloring not only organic, but also inorganic material (