potential gradient
41voltage gradient — Literally, the electric field in a region, defined as the potential difference between two points divided by the distance between them. Used more loosely, the potential difference across a plasma membrane …
42electrochemical gradient — the difference in ion concentration and electrical potential from one point to another, so that ions tend to move passively along it …
43Nernst potential — the voltage produced across a membrane by a concentration gradient of an ion that can diffuse through pores in the membrane while oppositely charged ions cannot pass through the membrane; see Nernst equation under equation …
44water potential — The pressure gradient that induces the flow of water, particularly with reference to plant water uptake from the soil, comprising the net effects of suction, solutes and matric forces …
45gravitational potential — noun : the scalar quantity characteristic of a point in a gravitational field whose gradient equals the intensity of the field and equal to the work required to move a body of unit mass from given point to a point infinitely remote …
46velocity potential — noun : the scalar quantity whose negative gradient equals the velocity in the case of irrotational flow of a fluid …
47Wood drying — (also seasoning lumber or timber seasoning) refers to reducing the moisture content of wood prior to its use. For some purposes wood is not dried at all (it is used green ) [http://en.wikipedia.org/wiki/Green wood] . Often the wood needs to be in …
48Corona discharge — The corona discharge around a high voltage coil …
49Chemiosmosis — is the movement of ions across a selectively permeable membrane, down their electrochemical gradient. More specifically, it relates to the generation of ATP by the movement of hydrogen ions across a membrane during cellular respiration. An Ion… …
50Atmospheric electricity — is the regular diurnal variations of the Earth s atmospheric electromagnetic network (or, more broadly, any planet s electrical system in its layer of gases). The Earth’s surface, the ionosphere, and the atmosphere is known as the global… …
