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  • 1
    Electronic Resource
    Electronic Resource
    Identification of some organic smog components based on rain water analysis (1974)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 1 (1974), S. 192-194 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: An analysis has been made of a sample of rain water collected in Washington, D.C. following a sustained photo-oxidant smog alert which was accompanied by haze and low visibility. The analysis was effected by purging the organic content from the water with helium gas and identifying the constituents by means of gas chromatography - mass spectrometry. The predominant compound was found to be 3-methylfuran, a possible intermediate or end product of the atmospheric decomposition of terpenoid hydrocarbons. The analysis suggests that the smog resulted from the air oxidation of hydrocarbons evolved from Appalachian forestation rather than from manassociated activities.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200010309
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  • 2
    Electronic Resource
    Electronic Resource
    Chemical ionization mass spectra of L-methionine and L-methionine analogs (1981)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 8 (1981), S. 95-98 
    Details
    ISSN: 1052-9306
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: L-Methionine, L-methionine sulfone, L-methionine-SR-sulfoxide, L-methionine-SR-sulfoximine, DL-ethionine-SR-sulfoximine, DL-prothionine-SR-sulfoximine, DL-buthionine-SR-sulfoximine, α-methyl-DL-methionine-SR-sulfoximine, α-ethyl-DL-methionine-SR-sulfoximine and β-methyl-DL-methionine-SR-sulfoximine were subjected to chemical ionization mass spectral analysis using isobutane as reactant. The resulting fragmentation patterns are discussed in relation to differences in structural and chemical properties. It was found that the sulfoximines exhibit chemical ionization mass spectra that are unique among amino acids.
    Additional Material: 1 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/bms.1200080303
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  • 3
    Electronic Resource
    Electronic Resource
    SERS of 1,8-naphthyridine and the Raman spectra of two of its complexes (1995)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 26 (1995), S. 1067-1070 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The surface-enhanced Raman (SER) spectra of 1,8-naphthyridine (napy) adsorbed on silver colloids were measured. An edge-on configuration for the molecule is suggested, based on a comparison of the SER spectra of napy compared with the conventional Raman spectra of two of its complexes, Ag2,(μ-napy)2(NO3)2 and OsO4 (napy), the former serving as a model for an edge-on configuration of napy.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250261208
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  • 4
    Electronic Resource
    Electronic Resource
    Surface-enhanced Raman scattering (SERS) from silver colloids of vanadate, phosphate and arsenate (1988)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 19 (1988), S. 503-507 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Surface-enhanced Raman scattering (SERS) of [HVO4]2-, [HPO4]2- and [HAsO4]2- has been studied on silver sol in H2O and 2H2O; in H2O the spectra were recorded from pH 3 to 12 with excitation at 488.0, 514.5, 568.2 and 647.1 nm. Considerable enhancement was observed compared with conventional Raman spectra, and deuteriation was observed to have no effect on the band positions in the SER spectra.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250190803
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  • 5
    Electronic Resource
    Electronic Resource
    Raman spectra of dewar benzene and benzvalene. (research note) (1974)
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 2 (1974), S. 147-152 
    Details
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jrs.1250020205
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  • 6
    Electronic Resource
    Electronic Resource
    Proton nuclear magnetic resonance study of the biologically active peptide analog [Pro2]thymopentin (1989)
    Chichester : Wiley-Blackwell
    Organic Magnetic Resonance 27 (1989), S. 496-497 
    Details
    ISSN: 0749-1581
    Keywords: Hydrogen exchange ; Nuclear magnetic resonance ; Solution conformation ; Thymopentin ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The solution conformation of the pentapeptide Arg-Pro-Asp-Val-Tyr ([Pro2]TP5), a biologically active analog of the immuno-regulatory peptide thymopentin, Arg-Lys-Asp-Val-Tyr (TP5), was investigated by proton nuclear magnetic resonance spectroscopy. The chemical shift variations with pH, the vicinal coupling constants and the amide hydrogen exchange rates were measured. The hydrogen exchange rates for Val4 NH and Tyr5 NH are more than six times slower than the predicted values for the corresponding solyated peptides. The guanidino NaH proton of the Arg1 residue shows a downfield shift with a pKa of 3.5 as the pH is increased. The conformational properties of [Pro2]-thymopentin were compared with those of two other closely related immunoregulatory peptides, thymopentin and [Glu3]TP5 (SP5).
    Additional Material: 4 Tab.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mrc.1260270514
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