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pressure potential
pressure potential Symbol Ψp. The component of water potential due to the hydrostatic pressure that is exerted on water in a cell. In turgid plant cells it usually has a positive value as the entry of water causes the protoplast to push against the cell wall (see turgor). In xylem cells there... Read more |
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osmotic pressure
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pressure melting
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pressure point
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pressure head
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isobar
isobar or isobaric line , line drawn on a weather map through points of equal atmospheric pressure. Isobars are used to define cyclones (low-pressure regions) and anticyclones (high-pressure regions). Weather maps are designed to depict the horizontal pressure distribution across an area of... Read more |
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barograph
barograph instrument used to make a continuous recording of atmospheric pressure. The pressure-sensitive element, a partially evacuated metal cylinder, is linked to a pen arm in such a way that the vertical displacement of the pen is proportional to the changes in the atmospheric pressure. The pen... Read more |
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expiration
expiration (exhalation) The process by which gas is expelled from the lungs (see respiratory movement). In mammals, the volume of the thoracic cavity is reduced by contraction of the internal intercostal muscles and relaxation of the muscles of the diaphragm, assisted by upward pressure of the... Read more |
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pressure-gradient force
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boiling point
boiling point temperature at which a substance changes its state from liquid to gas. A stricter definition of boiling point is the temperature at which the liquid and vapor (gas) phases of a substance can exist in equilibrium. When heat is applied to a liquid, the temperature of the liquid rises... Read more |
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atmospheric pressure
atmospheric pressure Pressure exerted by the atmosphere because of its gravitational attraction...barometers and usually expressed in units of mercury. Standard atmospheric pressure at sea level is 760mm (29.92in) of mercury. The column... |
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atmospheric high pressure
atmospheric high pressure Areas of high pressure with central pressure in the range of 1020–45 mb (millibars), occasionally reaching 1060 mb, are known as anticyclones or highs. The isobars are more or less concentric and are widely spaced... |
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atmospheric convergence and divergence
atmospheric convergence and divergence Atmospheric convergence refers to accumulation...centre of well-developed low-pressure systems, and, in the upper air...additional component of convergence.Atmospheric divergence typically occurs... |
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circulation, atmospheric
circulation, atmospheric In climatology, the movement of air in the troposphere...scale eddies, such as cyclones and anticyclones, low-pressure troughs and high-pressure ridges. Eddies are also caused by the Earth's rotation... |
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atmospheric temperature
atmospheric temperature In the atmosphere, temperature is one of the most sensitive...massive international effort yields detailed temperature (and wind and pressure) observations every few hours. Because many factors influence the temperature... |
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air pressure
...pressure with altitude is non-linear.Pressure is inversely related to temperature...solar heating generally experience low pressures (for example, thermal low pressures...of intense cooling experience high-pressure systems (for example the ... |
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gases in the body
...atmospheric pressure. Atmospheric pressure varies but, at sea...kPa). The partial pressures of nitrogen and oxygen in air at atmospheric pressure at sea level are therefore...respectively. As ... |
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El Niño
...moderate El Niño events.The atmospheric equivalent of El Niño is termed...Oscillation is a large-scale atmospheric pressure change over the south-eastern...mechanism for linking these atmospheric and oceanic phenomena. A... |
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hyperbaric chamber
...environment and saturation divingAs atmospheric pressure is increased in...Gas density increases with atmospheric pressure; the partial pressure of the various gases in the...effects become manifest. At pressures over three ... |
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storm surges
...are set up by changes in atmospheric pressure and associated...negative surge. A fall of atmospheric pressure of 1.005 millibars...50 km diameter where pressure is at its lowest, and here...knots (31 m s−1) and atmospheric ... |
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atmospheric pressure
atmospheric pressure The downward force exerted by the weight...given horizontal cross-section. Pressure varies throughout the atmosphere...passage of depressions and anticyclones. Atmospheric pressure is measured in millibars... |
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atmospheric extinction
atmospheric extinction The loss of starlight in passing through...contribute to extinction by Mie scattering. Atmospheric extinction is proportional to the airmass and the atmospheric pressure. At sea level and in a perfectly clear sky a... |
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atmospheric refraction
atmospheric refraction The displacement in apparent...a degree). According to a simple atmospheric model, the refraction at zenith distances...but the exact figure depends on the atmospheric pressure, temperature, and humidity. See... |
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ambient pressure
ambient pressure Atmospheric pressure in the surrounding air. |
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autoclave
...temperatures can be achieved by using high pressure; the domestic pressure cooker is an example. At atmospheric pressure water boils at 100 °C; at 5 lb (35 kPa) above atmospheric pressure the boiling point is 109... |
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Titan
...substantial atmosphere, the surface atmospheric pressure being higher than on Earth...and carbon monoxide. The atmospheric pressure at Titan's surface...of 200 km, while layers of atmospheric haze exist up to 500 km. The... |
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compressed air illness
...in people working under high pressure in diving bells or at great depths...apparatus. On return to normal atmospheric pressure nitrogen dissolved in the bloodstream...returning the victim to a higher atmospheric pressure and reducing this ... |
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bar
bar A unit of pressure, often used to express atmospheric pressures. One bar is equal to 105 pascals, approximately the Earth's atmospheric pressure at sea level. The millibar (100 Pa) is also frequently used. |
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decompression
...ŏn) n. 1. the reduction of pressure on an organ or part of the body by surgical intervention. Raised pressure in the fluid of the brain can...2. the gradual reduction of atmospheric pressure for deep-sea divers. See compressed... |
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pascal
pascal (symbol Pa) A unit of pressure equal to a pressure of one newton per square metre. One pascal equals 10-5 bar. Hence, the Earth's atmospheric pressure at sea level is approximately 105 pascal. It... |
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weather
...weather • noun what's the weather like? synonyms: forecast, outlook; meteorological conditions, climate, atmospheric pressure, temperature; elements. • verb we weathered the recession synonyms: survive, come through, ride out, pull... |
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US Patent Issued to Robert Bosch on Oct. 11 for "Micromechanical Device Which...
...Having Different Internal Atmospheric Pressures" was invented by Julian...having a different internal atmospheric pressure than the second cavity...cavities of different internal atmospheric pressures." The patent was ... |
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Imaging pattern formation in surface reactions from ultrahigh vacuum up to...
...reacting surface (2): At low pressures the conditions are nearly...PEEM) (3-5). At higher pressures, on the other hand, finite...surface patterns at arbitrary pressure. With these techniques...ultrahigh vacuum (UHV) to atmospheric pressures. ... |
 "The Spokesman-Review (Spokane, WA)")
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ATMOSPHERIC PRESSURES RAISE EL NINO PROSPECTS
...Australian scientists, the ones that watch the formations of El Nino and La Nina like a hawk, stated that current atmospheric pressures are slightly favoring a new El Nino. But, it's still too early to tell. For over a month, Japanese and Australian... |
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Response of Regional Sea Level to Atmospheric Pressure Loading in a Climate...
...frequency changes in atmospheric pressure loading, η^sub...response to increased atmospheric CO2 concentrations...studies is the surface pressure forcing, implying...However, a changing atmospheric circulation implies... |
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Japanese Inventor Develops Atmospheric Pressure Sensor
...control apparatus having two atmospheric pressure detecting systems as a...when a difference between atmospheric pressures detected by two sensors...Patent Office, said: "An atmospheric pressure estimating unit estimates... |
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Effects of global mean atmospheric pressure variations on mean sea level...
...related to atmospheric pressure. The inverse barometer...mean atmospheric pressure signal ECMWF atmospheric pressure fields...of the mean global atmospheric pressure. Figure...because ... |
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Effects of Helium Atmospheric Pressure Plasma Treatment on Low-Stress...
...are treated by He atmospheric pressure glow discharge plasma...used in atmospheric pressure plasma, because...investigate the effect of atmospheric pressure helium plasma...capacitively-coupled atmospheric ... |
 "The Evening Standard (London, England)")
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Meteorologist Ken Aucoin: "weighing in" on atmospheric pressure.(People to...
...lots of "high pressure" and "low pressure...weather? It's simple. Atmospheric pressure happens because...sinks, which makes atmospheric pressure higher, producing...created a difference in pressure. In the ... |
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WIPO ASSIGNS PATENT TO HONDA MOTOR FOR "ATMOSPHERIC PRESSURE ESTIMATION...
...12. Title of the invention: "ATMOSPHERIC PRESSURE ESTIMATION DEVICE." Applicants...Property Organization: "Disclosed is an atmospheric pressure estimation device that estimates the atmospheric pressure to be applied to the ... |
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Microwave plasma-assisted heat treating and joining at atmospheric pressure:...
...required by other low-pressure microwave technologies...cost and productivity pressures. The introduction of plasma at atmospheric pressure proved to be crucial...the use of reduced pressures to make the plasma...Using plasma at low ... |
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