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proton
proton
The Oxford Pocket Dictionary of Current English
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2009
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© The Oxford Pocket Dictionary of Current English 2009, originally published by Oxford University Press 2009. (Hide copyright information)
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pro·ton
/ ˈprōˌtän/
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n. Physics
a stable subatomic particle occurring in all atomic nuclei, with a positive electric charge equal in magnitude to that of an electron, but of opposite sign.
DERIVATIVES:
pro·ton·ic
/ prōˈtänik/ adj.
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Proton transport via the membrane surface
Magazine article from: Biophysical Journal; 6/1/2002; ; 700+ words
; ABSTRACT Some proton pumps, such as cytochrome...c^O), translocate protons across biological membranes...considerably exceeds the rate of proton transport to the entrance...The high rate of proton pumping raises the question...possible rate of supply of protons by the organelle's...
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Proton Energy Systems Successfully Completes Contract With NASA for Advanced UNIGEN(R) Unitized Regenerative Fuel Cell System.
PR Newswire; 1/9/2002; 700+ words
; ROCKY HILL, Conn. -- Proton Energy Systems, Inc. , a leader in practical applications of Proton Exchange Membrane, or PEM, technology and...Fuel Cell, or URFC, system. NASA selected Proton to demonstrate UNIGEN URFC systems as energy...
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Proton Energy Systems Announces Development Program With Ford.
PR Newswire; 12/12/2001; 700+ words
; ROCKY HILL, Conn. -- Proton Energy Systems, Inc. , a leader in practical applications of Proton Exchange Membrane, or PEM, electrochemical...20011212/CGW019 ) Under this agreement, Proton plans to deliver a FuelGen(TM) high-pressure...
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PROTON Selects DELMIA for Vehicle Packaging, Ergonomics and Assembly Studies.
Business Wire; 3/21/2002; 700+ words
; ...13065, DSY.PA) announced today that PROTON, Malaysia's leading car manufacturer...DELMIA for new car development processes. PROTON has invested substantial R&D efforts...the success of its new concept vehicle. PROTON believes that ergonomics, such as passenger...
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Proton Energy Systems Unveils High-Pressure 2000 PSI Full-Scale Prototype Hydrogen Generator.
PR Newswire; 11/14/2001; 700+ words
; ...Conn., Nov. 14 /PRNewswire/ -- Proton Energy Systems, Inc. (Nasdaq: PRTN), a leader in practical applications of Proton Exchange Membrane, or PEM, technology...hydrogen generator. This unit, based on Proton's commercial HOGEN(R) 20 hydrogen...
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Protons May Leak through Pure Lipid Bilayers via a Concerted Mechanism
Magazine article from: Biophysical Journal; 5/1/2005; ; 700+ words
; ...along which the protons can "hop" over...presence of an excess proton) suggest that...channels, facilitate proton transport by stabilizing...Permeation of protons along the water...with measured proton permeabilities by assuming that protons permeate instantaneously...
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Proton spin plays key role in smash hits. (collisions between subatomic particles)
Magazine article from: Science News; 11/3/1990; ; 700+ words
; ...subatomic particles such as protons. High-precision measurements now reveal that a proton's spin seems to have a surprisingly...spin effects in very violent proton-proton collisions, where two protons bounce off each other...
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Proton Energy Systems, Inc. Announces Filing of Form S-4.
PR Newswire; 9/4/2003; 700+ words
; Proton Energy Systems, Inc. , today announced...owned subsidiary of Distributed Energy and Proton will become a wholly owned subsidiary of...well as the approval of the stockholders of Proton and Northern. Investors and security holders...
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Proton Energy Systems and Matheson Tri-Gas Reach Agreement to End Contract.
PR Newswire; 1/31/2003; 700+ words
; Proton Energy Systems, Inc. , a leader in hydrogen...This is purely a business decision," said Proton's President and CEO Walter "Chip" Schroeder...products with a number of compelling features, Proton will focus on larger, higher margin products...
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Proton at the crossroads once again
Newspaper article from: New Straits Times; 8/17/2005; ; 700+ words
; ...Arifin New Straits Times 08-17-2005 Proton at the crossroads once again Byline...Lifestyle Column: Intermission I WAS at Proton's Shah Alam plant canteen in August...they were talking about. It seemed that Proton's first managing director Datuk Wan...
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Proton Pump Inhibitors
Encyclopedia entry from: Gale Encyclopedia of Medicine, 3rd ed.
Proton Pump Inhibitors Definition The proton pump inhibitors are a group of drugs that reduce the secretion...adenosine triphosphatase , which is sometimes referred to as the proton pump. This enzyme causes parietal cells of the stomach lining...
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Proton
Encyclopedia entry from: The Gale Encyclopedia of Science
Proton The proton is a positively charged subatomic particle. Protons are one of the fundamental constituents...is about 2,000 times lighter than a proton. In neutral atoms, the number of protons and electrons are equal. The number...
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proton
Book article from: The Columbia Encyclopedia, Sixth Edition
...contains one or more protons; the number of protons, called the atomic...The mass of the proton is about 1,840 times...the same mass as the proton but a unit negative...opposite magnetic moment. Protons are frequently used...
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proton pump
Book article from: A Dictionary of Biology
proton pump A carrier protein or complex of proteins that transports protons (H + ) across biological membranes. Such...the membrane compared to the other. This proton gradient is then exploited by the cell to...
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proton–proton reaction
Book article from: A Dictionary of Astronomy
proton–proton reaction A chain of nuclear reactions...the reaction, four hydrogen nuclei (protons) fuse to form one nucleus of helium...temperatures below 18 million K the proton–proton reaction is more...
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