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2. Mass spectrum - Wikipedia

   en.wikipedia.org/wiki/Mass_spectrum

   Mass spectrum. Electron ionization mass spectrum of toluene [1]. Note parent peak corresponding to molecular mass M = 92 (C 7 H 8+) and highest peak at M-1 = 91 (C 7 H 7+, quasi-stable tropylium cation). A mass spectrum is a histogram plot of intensity vs. mass-to-charge ratio (m/z) in a chemical sample, [1] usually acquired using an instrument ...

3. Mass spectrometry - Wikipedia

   en.wikipedia.org/wiki/Mass_spectrometry

   Appearance. Mass spectrometry (MS) is an analytical technique that is used to measure the mass-to-charge ratio of ions. The results are presented as a mass spectrum, a plot of intensity as a function of the mass-to-charge ratio. Mass spectrometry is used in many different fields and is applied to pure samples as well as complex mixtures.

4. Electromagnetic radiation - Wikipedia

   en.wikipedia.org/wiki/Electromagnetic_radiation

   These phenomena can aid various chemical determinations for the composition of gases lit from behind (absorption spectra) and for glowing gases (emission spectra). Spectroscopy (for example) determines what chemical elements comprise a particular star. Spectroscopy is also used in the determination of the distance of a star, using the red shift ...

5. Mass chromatogram - Wikipedia

   en.wikipedia.org/wiki/Mass_chromatogram

   Mass chromatogram. A mass chromatogram is a representation of mass spectrometry data as a chromatogram, where the x-axis represents time and the y-axis represents signal intensity. [1] The source data contains mass information; however, it is not graphically represented in a mass chromatogram in favor of visualizing signal intensity versus time.

6. De novo peptide sequencing - Wikipedia

   en.wikipedia.org/wiki/De_novo_peptide_sequencing

   Find mass differences at 28 Da since b-ions can form a-ions by loss of CO. Look for b 2-ions at low-mass end of the spectrum, which helps to identify y n-2-ions too. Mass of b 2-ions are listed in Table 2, as well as single amino acids that have equal mass to b 2-ions. [15] The mass of b 2-ion = mass of two amino acid residues + 1. Table 2.

7. NESN - Wikipedia

   en.wikipedia.org/wiki/NESN

   New England Sports Network, popularly known as NESN / n ɛ s. ɛ n /, is an American regional sports cable and satellite television network owned by a joint venture of Fenway Sports Group (which owns a controlling 80% interest, and is the owner of the Boston Red Sox, Liverpool Football Club, and the Pittsburgh Penguins) and Delaware North (which owns the remaining 20% interest in the network ...

8. Spectrum (physical sciences) - Wikipedia

   en.wikipedia.org/wiki/Spectrum_(physical_sciences)

   The microwave spectrum corresponds to frequencies between 300 MHz (0.3 GHz) and 300 GHz and wavelengths between one meter and one millimeter. [5] [6] Each broadcast radio and TV station transmits a wave on an assigned frequency range, called a channel. When many broadcasters are present, the radio spectrum consists of the sum of all the ...

9. Isotopes of neon - Wikipedia

   en.wikipedia.org/wiki/Isotopes_of_neon

   The abundances of the naturally occurring isotopes of neon. Neon (10 Ne) possesses three stable isotopes: 20Ne, 21Ne, and 22Ne. In addition, 17 radioactive isotopes have been discovered, ranging from 15Ne to 34Ne, all short-lived. The longest-lived is 24Ne with a half-life of 3.38 (2) min. All others are under a minute, most under a second.