GC-MS

Gas chromatography-mass spectrometry; an analytical tool that separates molecules by chromatography and then analyzes them for their mass.

IDP

Interplanetary dust particle.

IR

Infrared.

LSCM

Laser scanning confocal microscope.

MALDI

Matrix assisted laser desorption and ionization; a way of elevating large molecules into the gas phase to permit their analysis in a mass spectrometer that involves embedding these in a matrix, and then putting energy into the matrix to sputter it and the molecule of interest into the “gas phase.”

MPN

Most probable number.

mRNA

Messenger RNA.

PCR

Polymerase chain reaction.

rRNA

Ribosomal RNA.

RNA

Ribonucleic acid.

S

Svedberg; a unit of sedimentation coefficient, equal to 10−13 second.

SAED

Selected area electron diffraction.

SEM

Scanning electron microscopy; images objects as small as 1 nanometer.

SIMS

Secondary ion mass spectrometry.

SNC

meteorites Three small classes of basaltic meteorites (shergottites, nakhlites, and chassignites) thought to have been ejected from Mars 's surface during an impact.

TEM

Transmission electron microscopy.

TOF

Time of flight; a type of mass spectrometry that assesses the mass of an ion by the time that it takes to move in an electric field.

TPF

Terrestrial Planet Finder.

UV

Ultraviolet.

XAFS

X-ray absorption fine structure.

XRD

X-ray diffraction.

XRF

X-ray fluorescence.



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