Red cabbage indicator. A simple indicator can be made from the pigment anthocyanin in red cabbage by liquidising the leaves in water and then filtering the solution. Its normal purple colour turns green in alkali and red in acid | |
Licence : | Droits gérés |
Crédit: | Science Photo Library / Chillmaid, Martyn F. |
Taille de l’image : | 5760 px × 3840 px |
Model Release : | Non requis |
Property Release : | Non requis |
Restrictions : | - |