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  • 1
    Electronic Resource
    Electronic Resource
    The elusive dimethylhydroxysulfuranyl radical. An intermediate or a transition state? (1992)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 114 (1992), S. 7146-7151 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00044a029
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  • 2
    Electronic Resource
    Electronic Resource
    An inverse free parallel spectral divide and conquer algorithm for nonsymmetric eigenproblems (1997)
    Springer
    Numerische Mathematik 76 (1997), S. 279-308 
    Details
    ISSN: 0945-3245
    Keywords: Mathematics Subject Classification (1991):65F15
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Summary. We discuss an inverse-free, highly parallel, spectral divide and conquer algorithm. It can compute either an invariant subspace of a nonsymmetric matrix $A$ , or a pair of left and right deflating subspaces of a regular matrix pencil $A - \lambda B$ . This algorithm is based on earlier ones of Bulgakov, Godunov and Malyshev, but improves on them in several ways. This algorithm only uses easily parallelizable linear algebra building blocks: matrix multiplication and QR decomposition, but not matrix inversion. Similar parallel algorithms for the nonsymmetric eigenproblem use the matrix sign function, which requires matrix inversion and is faster but can be less stable than the new algorithm.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002110050264
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  • 3
    Electronic Resource
    Electronic Resource
    Franck-Condon Dominated Chemistry. Formation and Dissociations of Tetrahydroxyphosphoranyl Radicals Following Femtosecond Reduction of Their Cations in the Gas Phase (1995)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 99 (1995), S. 2278-2291 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100008a008
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  • 4
    Electronic Resource
    Electronic Resource
    Synthesis and properties of poly (1,4-cyclohexanedicarboxylic anhydride) (2000)
    Springer
    Polymer bulletin 45 (2000), S. 223-229 
    Details
    ISSN: 1436-2449
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: Summary Polyanhydrides from cycloaliphatic 1,4-Cyclohexanedicarboxylic acid (1,4-CHDA) were synthesized by melt polycondensation and characterized by WAXD, FTIR and DSC. The results show that these polymer displayed strong crystallinity with highly melting point and can't be dissolved in common solvents. The polymers, which come from different original isomer conformation CHDA, show different melting point and DSC curve. The isomerization happened during the polymerization and reached an equilibrium point at last. By melt polycondensation, the high cis-isomer content polyanhydride is difficult to obtained.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002890070024
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  • 5
    Electronic Resource
    Electronic Resource
    Characterization of TiO2-PVP nanocomposites prepared by the sol-gel method (2000)
    Springer
    Journal of materials science 19 (2000), S. 433-436 
    Details
    ISSN: 1573-4811
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1006703224379
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  • 6
    Electronic Resource
    Electronic Resource
    Advances in second-order calibration (1993)
    New York, NY : Wiley-Blackwell
    Journal of Chemometrics 7 (1993), S. 117-130 
    Details
    ISSN: 0886-9383
    Keywords: Calibration ; Rank annihilation ; Three-way ; Trilinear ; Bilinear ; Non-bilinear ; Net analyte signal ; MS/MS ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Several multivariate methods are now available for the calibration of second-order or hyphenated instruments (e.g. GC/MS). When applied to bilinear data, it has been shown that calibration can be performed in the presence of unknown interferences - a significant advantage over first-order calibration. In this paper, non-bilinear rank annihilation (NBRA), a method which has the potential of handling, second-order non-bi-linear data, is studied through theoretical analysis and computer simulation. It is found that the second-order advantage can be carried over to non-bilinear data if a property defined as net analyte rank (NAR) holds for the analyte of interest. The net analyte signal (NAS) is defined accordingly for second-order calibration and the analogy to and difference from lower-order calibration are discussed. With NAS, some analytical figures of merit such as signal-to noise ratio, selectivity, sensitivity and limit of determination can be calculated for second order calibration. An application to MS/MS data is also given.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cem.1180070205
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  • 7
    Electronic Resource
    Electronic Resource
    Electrophoresis combined with novel mass spectrometry techniques: Powerful tools for the analysis of proteins and proteomes (1998)
    Weinheim : Wiley-Blackwell
    Electrophoresis 19 (1998), S. 1811-1818 
    Details
    ISSN: 0173-0835
    Keywords: Electrospray ionization ; Mass spectrometry ; Capillary electrophoresis ; Two-dimensional gel electrophoresis ; Proteome ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Analytical and preparative electrophoresis separation techniques have been essential tools in protein biochemistry and the biological sciences in general. The combination of high resolution electrophoresis techniques with high performance analytical procedures has dramatically enhanced analytical protein biochemistry. In this report we describe the combination of electrophoretic separation techniques with electrospray ionization (ESI) tandem mass spectrometry (MS/MS). A series of different techniques, consisting of automated high performance liquid chromatography (HPLC)-MS/MS, capillary-HPLC-MS/MS, and solid phase extraction (SPE)-capillary zone electrophoresis (CZE)-MS/MS, are described in the context of the identification of high pmol to the low fmol amounts of proteins. Application of these powerful new tools for the analysis of proteins on a large proteome-wide scale is presented. Furthermore, the combination of orthogonal separation techniques, such as immobilized metal affinity chromatography (IMAC) with SPE-CZE-MS/MS, and IMAC followed by HPLC, and by SPE-CZE-MS/MS, are presented for the detailed investigation of post-translational modifications of specific proteins.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/elps.1150191045
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  • 8
    Electronic Resource
    Electronic Resource
    Survivor ion mass spectrometry (1992)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 27 (1992), S. 1335-1336 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210271132
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  • 9
    Electronic Resource
    Electronic Resource
    The Precursor scan. A new type of experiment in neutralization-reionization mass spectrometryDedicated to Professor J. L. Holmes on the occasion of his retirement as Editor of Organic Mass Spectrometry. (1993)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 28 (1993), S. 1135-1143 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A new scan technique utilizing the tandem quadrupole acceleration-deceleration mass spectrometer is described. The technique is based on combined monitoring of neutral and ion precursors that fragment following collisional electron transfer to give rise to a selected low-mass neutral species and its ion, respectively. PO· is found to be a stable neutral species formed by dissociations of a variety of oxidized phosphorus compounds, such as di- and trialkyl phosphites, phosphates and phosphonic esters. These compounds can be selectively monitored through PO·. precursor scans in multi-component mixtures. Interferences from isobaric neutral species, 35CIC·, CH3S·, CH330SiH2·, and their precursors are discussed. Neutralization-reionization spectra of phosphorus-containing radicals, PO·, CH3OPH·, CH3OPOH·, ·P(OCH3)2 and (CH3O)2PO·, are also reported.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210281026
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  • 10
    Electronic Resource
    Electronic Resource
    Fingerprinting stereoisomers by survivor-ion mass spectrometry (1994)
    Chichester : Wiley-Blackwell
    Biological Mass Spectrometry 29 (1994), S. 85-89 
    Details
    ISSN: 0030-493X
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Survivor-ion mass spectrometry is used to distinguish stereoisomeric cis- and trans-4-methylcyclohexanol. The method involves producing ions by electron impact ionization and submitting them without mass selection to collisional neutralization and reionization, followed by selective monitoring of non-dissociating ions. The differences in the electron impact mass spectra of the stereoisomers, due to the different fragment ion elemental compositions and structures, are highlighted by collisional neutralization with Xe, NO and CH3SSCH3, followed by reionization with oxygen. The differences in the survivor-ion spectra are due to different neutralization efficiencies of the isobaric and isomeric ions produced by electron impact ionization, different stabilities of the intermediate neutral species, different reionization efficiencies and reionized ion stabilities. Neutralization-reionization spectra of the C7H12+., C6H9+, C3H6O+. and C3H5O+ ions from stereoisomeric 4-methylcyclohexanols are also reported.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/oms.1210290204
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