mass spectrum

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mass spectrum

n.
A pattern of charged atoms, molecules, or isotopes formed when a mass spectroscope distributes them by mass and records them electronically or photographically as a spectrum.

mass′ spec′trum


n.
a spectrum of charged particles arranged in order of mass or mass-to-charge ratios.
[1915–20]
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.mass spectrum - a distribution of ions as shown by a mass spectrograph or a mass spectrometermass spectrum - a distribution of ions as shown by a mass spectrograph or a mass spectrometer
spectrum - an ordered array of the components of an emission or wave
References in periodicals archive ?
Some of these may in fact be more than singly ionized, which in fact gives the molecule greater "F," and thus greater acceleration and a shorter "t." Strictly, mass spectrums report "m/Z," mass divided by charge, which corrects for this; and in our pattern matching type application, this proportion of fragments with multiple charges just adds additional spectral peaks which form part of the overall pattern.
Well, it turns out that if we use a relatively uniform sample of bacteria such as a single colony from a microbiological media plate as a target, we get a very complex mass spectrum pattern out of our MALDI-TOF.
This approach has significant technical challenges, in that not all resistance factors lead to recognizable ion fragments in a whole bacteria MALDI-TOF experiment; and the ones that do can, of course, undergo genetic changes which may or may not impact the antibiotic resistance phenotype but can alter the appearance of the mass spectrum. A second approach is to take the bacterial colony of interest, expose samples of it to a series of antibiotics, and mass spec analyze the samples after exposure, looking for characteristic mass spec changes associated with growth inhibition.