Editing Fick's laws of diffusion (section)

=== Food production and cooking ===
The formulation of Fick's first law can explain a variety of complex phenomena in the context of food and cooking: Diffusion of molecules such as ethylene promotes plant growth and ripening, salt and sugar molecules promotes meat brining and marinating, and water molecules promote dehydration. Fick's first law can also be used to predict the changing moisture profiles across a spaghetti noodle as it hydrates during cooking. These phenomena are all about the spontaneous movement of particles of solutes driven by the concentration gradient. In different situations, there is different diffusivity which is a constant.<ref>{{cite journal | vauthors = Zhou L, Nyberg K, Rowat AC | title = Understanding diffusion theory and Fick's law through food and cooking | journal = Advances in Physiology Education | volume = 39 | issue = 3 | pages = 192–197 | date = September 2015 | pmid = 26330037 | doi = 10.1152/advan.00133.2014 | s2cid = 3921833 | url = http://www.escholarship.org/uc/item/1t87565r }}</ref>

By controlling the concentration gradient, the cooking time, shape of the food, and salting can be controlled.