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Index (M)

MA - MC

MD - MF

MG - MJ

MK - MN

MO - MR

MS - MV

MW - MZ

Moment of truth
The fastest man-made object that ever leave the Earth is the Pinoeer 10 spacecraft, launched in 1972, and attained a speed of more than 32000 mph.


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muon Phys.
Fundamental particle, symbol m- (with a bar if it is an antiparticle), with a rest mass of 105.7 MeV. It belongs to the lepton family and as a negative charge with a half life of about 2.2 x 10-6 s that decays to electron, electron antineutrino and muon neutrino. It only participates in weak interactions:

muon decay

The muon is produced in the upper atmosphere by the decay of charged pions produced by cosmic ray.

mutagenesis Med., Biochem.
The study of characterization, identification of the mechanism of action of biological, chemical and physical agents capable of producing genetic change in living organisms and the consequences of such change. This usually involves alteration of amino acid sequences in proteins. There are two common techniques to achieve this: site-direct mutagenesis and random mutagenesis.

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