Results 261 to 270 of about 7,531,222 (289)
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Analytical Chemistry, 2017
Here, we present atmospheric pressure photoionization (APPI) Fourier transform ion cyclotron resonance (FTICR) mass analysis of a volcanic asphalt sample by acquiring data for 20 Da wide mass segments across a 1000 Da range, stitched into a single ...
Logan C Krajewski +2 more
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Here, we present atmospheric pressure photoionization (APPI) Fourier transform ion cyclotron resonance (FTICR) mass analysis of a volcanic asphalt sample by acquiring data for 20 Da wide mass segments across a 1000 Da range, stitched into a single ...
Logan C Krajewski +2 more
semanticscholar +1 more source
1996
FORMATION OF IONS A mass spectrometer works with electrically charged particles and, before a mass spectrum can be obtained, the substance under examination must be ionized if it is not already ionic. Most research into mass spectrometry has been carried out on positive ions and these are discussed in detail.
Robert A. W. Johnstone, Malcolm E. Rose
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FORMATION OF IONS A mass spectrometer works with electrically charged particles and, before a mass spectrum can be obtained, the substance under examination must be ionized if it is not already ionic. Most research into mass spectrometry has been carried out on positive ions and these are discussed in detail.
Robert A. W. Johnstone, Malcolm E. Rose
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Canadian Journal of Physics, 1981
The charmonium mass spectrum is evaluated using the oscillator potential as responsible for long range confinement. Hyperfine splittings for the color singlet [Formula: see text] system are discussed using various approaches. The mass of [Formula: see text] and [Formula: see text] are also briefly touched upon.
Sajjad Mahmood, M. M. Ilyas
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The charmonium mass spectrum is evaluated using the oscillator potential as responsible for long range confinement. Hyperfine splittings for the color singlet [Formula: see text] system are discussed using various approaches. The mass of [Formula: see text] and [Formula: see text] are also briefly touched upon.
Sajjad Mahmood, M. M. Ilyas
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Environmental Science and Technology, 2015
Electrospray mass spectrometry has been reported as a novel technique for Al species identification, but to date, the working mechanism is not clear and no unanimous method exists for spectrum analysis of traditional Al salt flocculants, let alone for ...
C. Feng, Z. Bi, Hong-xiao Tang
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Electrospray mass spectrometry has been reported as a novel technique for Al species identification, but to date, the working mechanism is not clear and no unanimous method exists for spectrum analysis of traditional Al salt flocculants, let alone for ...
C. Feng, Z. Bi, Hong-xiao Tang
semanticscholar +1 more source
Imaging spectrum of mesenteric masses
Abdominal Radiology, 2020Mesenteries are extensions of the visceral and parietal peritoneum consisting of fat, vessels, nerves, and lymphatics. Mesenteric masses have a wide differential diagnosis with neoplastic, infectious, or inflammatory etiologies and can either be solid or cystic. Imaging features are critical for the diagnosis.
Sanaz Javadi +6 more
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The mass spectrum of trimethylboroxine
Journal of Inorganic and Nuclear Chemistry, 1961Abstract Comparison of the mass spectra of isotopically normal and 10B-enriched trimethylboroxines makes possible the identification of the various fragments. The spectra furnish independent substantiation of the molecular weight and structure of (CH3)3B3O3—a ring with considerable aromatic character. The 10 B 11 B isotopic abundance
I. Shapiro, W.J. Lehmann, C.O. Wilson
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Journal of Chemical Education, 1989
The concepts of isotopic abundance, mass defect, fragmentation, and nuclear binding energies are all illustrated in the readily interpretable spectrum of a nonorganic material.
Gerald O. Dudek, Emily P. Dudek
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The concepts of isotopic abundance, mass defect, fragmentation, and nuclear binding energies are all illustrated in the readily interpretable spectrum of a nonorganic material.
Gerald O. Dudek, Emily P. Dudek
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International Journal of Mass Spectrometry and Ion Physics, 1970
Abstract The charge exchange mass spectrum of NO2 has been studied in a tandem mass spectrometer. The agreement with photon impact and electron impact mass spectra proves that at least the fragmentation process giving NO+ takes place from a molecule-ion that has been formed directly without autoionization processes.
Einar Lindholm, G. Sahlström
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Abstract The charge exchange mass spectrum of NO2 has been studied in a tandem mass spectrometer. The agreement with photon impact and electron impact mass spectra proves that at least the fragmentation process giving NO+ takes place from a molecule-ion that has been formed directly without autoionization processes.
Einar Lindholm, G. Sahlström
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Mass spectrum of tetrabutyltin
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 19681. The mass spectrum of tetrabutyltin was taken on the MI-1305 and MI-1311 instruments, and a substantiation was given for the dependence of the ratio H4−xSnBux+/SnBux+ upon the number of butyl groups in the ion. The processes of decomposition of metastable ions were discussed. 2.
I. L. Agafonov +4 more
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Journal of Inorganic and Nuclear Chemistry, 1961
Abstract The mass spectrum of stannane, SnH 4 , has been studied. Ion fragmentation patterns for both the singly and doubly charged fragments were obtained employing 70 V electrons. From appearance potential data, an estimation of the bond energies of the tin-hydrogen bond in the ion-species SnH 3 + H, SnH 2 + H, Sn + H has been made along with
H.J. Svec, F.E. Saalfeld
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Abstract The mass spectrum of stannane, SnH 4 , has been studied. Ion fragmentation patterns for both the singly and doubly charged fragments were obtained employing 70 V electrons. From appearance potential data, an estimation of the bond energies of the tin-hydrogen bond in the ion-species SnH 3 + H, SnH 2 + H, Sn + H has been made along with
H.J. Svec, F.E. Saalfeld
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