proton

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proton

 [pro´ton]
an elementary particle of mass number 1, with a positive charge equal to the negative charge of the electron; a constituent particle of every nucleus, the number of protons in the nucleus of each atom of a chemical element being indicated by its atomic number.

pro·ton (p),

(prō'ton),
The positively charged unit of the nuclear mass; protons form part (or in hydrogen 1 the whole) of the nucleus of the atom around which the negative electrons revolve.
[G. ntr. of prōtos, first]

proton

/pro·ton/ (pro´ton) an elementary particle that is the core or nucleus of an ordinary hydrogen atom of mass 1; the unit of positive electricity, being equivalent to the electron in charge and approximately to the hydrogen ion in mass. Symbol p.

proton

[prō′ton]
Etymology: Gk, protos, first
a positively charged particle that is a fundamental component of the nucleus of all atoms. The number of protons in the nucleus of an atom equals the atomic number of the element. Compare electron, neutron. See also atomic mass.

proton

A positively charged particle located in the nucleus of an atom of an element, the number of which governs its chemical properties.

pro·ton

(prō'ton)
The positively charged unit of the nuclear mass; protons form part (or in hydrogen 1, the whole) of the nucleus of the atom around which the negative electrons revolve.
[G. ntr. of prōtos, first]

proton

The positively-charged nucleus of a hydrogen atom. A hydrogen ion and the basis of acids.

proton,

n positively charged subatomic particle that is located in the nucleus of an atom. Its mass is equivalent to that of a neutron. The number of protons is equivalent to the atomic number.

pro·ton

(prō'ton)
The positively charged unit of the nuclear mass; protons form part (or in hydrogen 1, the whole) of the nucleus of the atom around which the negative electrons revolve.
[G. ntr. of prōtos, first]

proton (prō´ton),

n an elementary particle having a positive charge equivalent to the negative charge of the electron but possessing a mass approximately 1845 times as great; the proton is a nuclear particle, whereas the electron is extranuclear.

proton

an elementary particle of mass number 1, with a positive charge equal to the negative charge of the electron; a constituent particle of every nucleus, the number of protons in the nucleus of each atom of a chemical element being indicated by its atomic number.

proton pump
see sodium pump.
proton pump inhibitor
a class of therapeutic agents which are used to counteract the effects of proton pumps in tissues and organs, particularly used in counteracting gastric hypersecretion and acidity.
References in periodicals archive ?
com/prnh/20130307/600769 ) In US, there are 14 proton therapy centers catering to a potential patient base of more than 350,000 cancer patients with respect to treatment with proton therapy.
Proton radiation--beams of hydrogen nuclei--causes worse breaks in DNA than researchers had expected, a study finds.
A Runge-Kutta algorithm with adaptive step-size control was used to calculate the trajectories of protons and neutrons [7].
Solid state proton conductors are of central interest for many technological innovations, including hydrogen and humidity sensors, membranes for water electrolyzers and, most importantly, for high-efficiency electrochemical energy conversion in fuel cells.
19, 2015 /PRNewswire/ -- Construction has begun on a new Proton Therapy Center at Beaumont Hospital's Cancer Institute in Royal Oak.
Usually this is done with one electron and one proton detector.
Earth's thick atmosphere and magnetic field shielded the planet from these high energy protons and other forms of solar radiation.
Proton therapy, an alternative to radiation for the treatment of cancer, will be available in Illinois sooner than expected.
Unlike conventional X-ray therapy, proton therapy uses high speed particles that can be more precisely conformed to treat the tumor while sparing healthy tissue and without an exit dose.
To detect the protons which have very low initial energy, the decay region is placed at high voltage (25 kV).
The speed of this process depends on the slowest reaction in the chain: the collision between a proton and a nitrogen-14 nucleus.
Students at Ivy Tech Community College - Bloomington will be the first in the nation to be offered a highly specialized training program in proton therapy, an alternative to traditional radiation therapy that is emerging at treatment centers across the country, creating a demand for credentialed therapists.