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 ?
The Qatar National Cancer Strategy is a vital component of Qatar's healthcare vision and SAH Qatar Proton will be an important step forward in the fight against cancer, not just in Qatar but throughout the Middle East.
Proton car owners are also given extended warranty.
8 percent stake in Proton, half of which was sold to state-owned investment arm, Khazanah Holdings, boosting the latter's stake in Proton to 42.
A Runge-Kutta algorithm with adaptive step-size control was used to calculate the trajectories of protons and neutrons [7].
Not only did approximately 99 percent of the patients surveyed believe they made the best treatment decision for themselves, but an almost equal number - almost 98 percent - reported that they had recommended proton therapy to others.
Across the world Proton Beam Therapy has been shown to deliver significant results for patients, especially in lowering side effects.
US Proton Therapy Market Overview - Targeted Patient Base & Economic Capacity Analysis - Proton Therapy Cost Analysis - Proton Therapy Reimbursement Policy - Proton Therapy Center Infrastructure Analysis - US Proton Therapy Market Dynamics - Insight on Operating & Upcoming Proton Therapy Centers
The proton is measured in coincidence with a decay electron.
Earth's thick atmosphere and magnetic field shielded the planet from these high energy protons and other forms of solar radiation.
The breakthrough study evaluated the quality of life of approximately 1,000 prostate cancer patients following proton therapy treatment at five centers and compared them to men who haven't been treated for cancer.
A list of centers and more information about proton therapy is available on the website of the National Association for Proton Therapy (NAPT) at www.
The electron and proton detectors are installed on the axis of the magnetic system.