Orthochromasia

The Union Jack on orthochromatic emulsion at the South Magnetic Pole in 1909.

In chemistry, orthochromasia is the property of a dye or stain to not change color on binding to a target, as opposed to metachromatic stains which change color. The word is derived from the Greek ortho (correct, upright), and chromatic (color). Toluidine blue is an example of a partially orthochromatic dye, as it stains nucleic acids by its orthochromatic color (blue), but stains mast cell granules in its metachromatic color (red).

单词	Orthochromasia
释义	Orthochromasia 英语百科 Orthochromasia In chemistry, orthochromasia is the property of a dye or stain to not change color on binding to a target, as opposed to metachromatic stains which change color. The word is derived from the Greek ortho (correct, upright), and chromatic (color). Toluidine blue is an example of a partially orthochromatic dye, as it stains nucleic acids by its orthochromatic color (blue), but stains mast cell granules in its metachromatic color (red).
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