Color change
In organisms , especially animals , color change refers to a change in the color of the body surface.
A distinction is made between different types of color changes depending on the speed of the color change and the mechanism on which it is based:
Melanophores on the skin of cichlids shift pigments when they change color
- physiological color change : The physiological color change is by changing the location of pigment - molecules within the color cells reached and takes place in moments, that is, it takes more than a few minutes.
- Morphological color change : The morphological color change comes about through the change in the amount of color pigments in the color cells and / or through the change in the number of pigment cells and takes days or weeks. A special case is the change of fur in many mammals in seasonal climates .
See also
The color of a solution changes due to a chemical reaction, for example when titrating against a color indicator . The progress of the ripening of fruits, such as cherries from yellow-red to red-blue, is based on an analogous mechanism.
Individual evidence
- ↑ color change. In: Lexicon of Biology. Spektrum Akademischer Verlag, 1999, accessed on November 29, 2017 .
- ^ Michael Müller: Acid-base indicators. chempage.de, accessed on November 29, 2017 .
- ↑ Anthocyanins. In: Food Lexicon. Lebensmittelwissen.de, accessed on November 29, 2017 .