water gradient pressure

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• Pressure retarded osmosis — (PRO) is the salinity gradient energy retrieved from the difference in the salt concentration between seawater and river water. In PRO, the water potential between fresh water and sea water corresponds to a pressure of 26 bars. This pressure is… …   Wikipedia

• Pressure gradient — In atmospheric sciences (meteorology, climatology and related fields), the pressure gradient (typically of air, more generally of any fluid) is a physical quantity that describes in which direction and at what rate the pressure changes the most… …   Wikipedia

• Pressure — This article is about pressure in the physical sciences. For other uses, see Pressure (disambiguation). Pressure as exerted by particle collisions inside a closed container …   Wikipedia

• Water table — The water table is the level at which the ground water pressure is equal to atmospheric pressure. It may be conveniently visualized as the surface of the ground water in a given vicinity. It usually coincides with the phreatic surface , but can… …   Wikipedia

• Pressure Flow Hypothesis — The Pressure Flow Hypothesis, also known as the Mass Flow Hypothesis, is the best supported theory to explain the movement of food through the phloem.[1] It was proposed by Ernst Münch, a German plant physiologist in 1930.[2] A high concentration …   Wikipedia

• Water content — Soil composition by phase: s soil (dry), v void (pores filled with water or air), w water, a air. V is volume, M is mass. Water content or moisture content is the quantity of water contained in a material, such as soil (called soil moisture),… …   Wikipedia

• water table —    1. The top surface of a body of slowly moving ground water that fills the pore spaces within a rock mass. Above it lies the freely draining vadose zone, and below it lies the permanently saturated phreas. In uniform aquifers, such as sandstone …   Lexicon of Cave and Karst Terminology

• Pressure system — A pressure system is a region of the Earth s atmosphere where air pressure is unusually high or low. High and low pressures develop (and dissipate) constantly due to thermodynamic interactions of temperature differentials in the atmosphere and… …   Wikipedia

• pressure — 1. A stress or force acting in any direction against resistance. 2. (P, frequently followed by a subscript indicating location)In physics and physiology, the force per unit area exerted by a gas or liquid against the walls of its container or… …   Medical dictionary

• water 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 …   Glossary of Biotechnology

• pressure retarded osmosis — noun The salinity gradient energy retrieved from the difference in the salt concentration between seawater and river water. Syn: PRO …   Wiktionary