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  • 1
    Electronic Resource
    Electronic Resource
    Membrane preconcentration-capillary electrophoresis-mass spectrometry (mPC-CE-MS) analysis of 3-phenylamino-1,2-propanediol (PAP) metabolites (1996)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 19 (1996), S. 291-294 
    Details
    ISSN: 0935-6304
    Keywords: Capillary electrophoresis-mass spectrometry ; Membrane preconcentration ; Capillary electrophoresis ; Sulfonated membrane ; Polar drug metabolites ; Toxic oil syndrome ; Eosinophilia-myalgia syndrome ; 3-Phenylamino-1,2-propanediol ; 3-Phenylamino-L-alanine ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240190511
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  • 2
    Electronic Resource
    Electronic Resource
    Solid-phase dendrimer synthesis (1998)
    New York : Wiley-Blackwell
    Biopolymers 47 (1998), S. 381-396 
    Details
    ISSN: 0006-3525
    Keywords: solid-phase synthesis ; dendrimer ; hyperbranched polymers ; polyamidoamine ; bead loading amplification ; multiple antigen peptide system ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Dendrimers are highly ordered, hyperbranched polymers with potential for a whole range of chemical applications. Solution-phase synthesis of dendrimers is often challenging, requiring long reaction times and nontrivial purification; solid-phase methodology, on the other hand, enables reactions to be driven to completion by using a large excess of reagents with trivial purification. In this paper we show that polyamidoamine dendrimers may be synthesized conveniently and efficiently on a solid support, and that these molecules are of good homogeneity as characterized by 1H- and 13C-nmr and electrospray mass spectrometry. These solid-phase dendrimers were used as a bead loading amplification tool in the synthesis of a hexapeptide library (Xaa-Gly-Gly-Phe-Leu-Lys) to allow single bead analysis as well as allowing the efficient synthesis of two dendrimer conjugates (Leu-enkephalin-Lys and Chlorambucil). This demonstrated that peptides and small drug molecules can be grown directly onto the dendrimer or onto a linker attached to the dendrimer periphery, enhancing general dendrimer utility. © 1999 John Wiley & Sons, Inc. Biopoly 47: 381-396, 1998
    Additional Material: 11 Ill.
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  • 3
    Electronic Resource
    Electronic Resource
    Engineering dynamics of growth factors and other therapeutic ligands (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Biotechnology and Bioengineering 52 (1996), S. 61-80 
    Details
    ISSN: 0006-3592
    Keywords: growth factors ; receptors ; trafficking ; mammalian cells ; cell engineering ; cytokine ligands ; Chemistry ; Biochemistry and Biotechnology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Peptide growth factors and other receptor-binding cytokine ligands are of interest in contemporary molecular health care approaches in applications such as wound healing, tissue regeneration, and gene therapy. Development of effective technologies based on operation of these regulatory molecules requires an ability to deliver the ligands to target cells in a reliable and well-characterizable manner. Quantitative information concerning the fate of peptide ligands within tissues is necessary for adequate interpretation of experimental observations at the tissue level and for truly rational engineering design of ligand-based therapies. To address this need, we are undertaking efforts to elucidate effects of key molecular and cellular parameters on temporal and spatial distribution of cytokines in cell population and cell/matrix systems. In this article we summarize some of our recent findings on dynamics of growth factor depletion by cellular endocytic trafficking, growth factor transport through cellular matrices, and growth factor production and release by autocrine cell systems. © 1996 John Wiley & Sons, Inc.
    Additional Material: 18 Ill.
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  • 4
    Electronic Resource
    Electronic Resource
    Intermediates in the Catalytic Dehydrogenative Coupling of Arylgermanes (1997)
    Weinheim : Wiley-Blackwell
    Chemistry - A European Journal 3 (1997), S. 1793-1796 
    Details
    ISSN: 0947-6539
    Keywords: dehydrogenative coupling ; germanium ; platinum ; reaction mechanisms ; structure elucidation ; Chemistry ; General Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The use of a new electron-withdrawing germane, H2Ge[3,5-(CF3)2C6H3]2 (3), has facilitated the isolation and characterization of three new complexes implicated in the dehydrogenative coupling of bisarylgermanes by Pt0-phos-phane complexes. The intermediates include a digermyl species, trans-[(Et3P)2Pt{GeH(Ar)2}2] (7), a bound digermane showing the first stage of Ge-Ge catenation, cis-[(Et3P)2Pt(H){Ge(Ar)2-GeH(Ar)2}] (8), and the Ge-H activated form of this product, [(Et3P)2HPtGe(Ar)2-Ge(Ar)2PtH(PEt3)2] (6). Complexes such as 6 and 8 have not previously been isolated as intermediates in dehydrogenative coupling reactions. An X-ray crystal structure was determined for complex 6, confirming the cis geometry of the hydrogen and germanium ligands; this provides yet another example of the stability of germyl hydrides towards reductive elimination. A similar cis geometry was observed for complex 8. Performing the dehydrogenative coupling reaction under a CO2 atmosphere failed to yield any products containing trapped germylene species.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/chem.19970031110
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  • 5
    Electronic Resource
    Electronic Resource
    Preparation and thermolysis of a single-source precursor to gallium arsenide phosphideThis work was supported by a generous grant from the Air Force Office of Scientific Research, and by a grant from the Lord Foundation of North Carolina. We thank Wei Ou, University of North Carolina - Chapel Hill for help with XPS experiments, and North Carolina Analytics, Durham, North Carolina, for help with XRD analysis. (1995)
    Weinheim : Wiley-Blackwell
    Chemical Vapor Deposition 1 (1995), S. 28-31 
    Details
    ISSN: 0948-1907
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/cvde.19950010106
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  • 6
    Electronic Resource
    Electronic Resource
    The mass spectra of 1- and 2-alkylbenzotriazoles (1997)
    New York, NY [u.a.] : Wiley-Blackwell
    Heteroatom Chemistry 8 (1997), S. 459-464 
    Details
    ISSN: 1042-7163
    Keywords: Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The fragmentation patterns of a series of 1- and 2-alkylbenzotriazoles are recorded and interpreted in comparison with available literature data. 1- and 2-Substituted benzotriazoles are readily differentiated on the basis of the relative ease with which a 1-substituted isomer loses nitrogen compared with the corresponding 2-isomer, resulting in generally weak parent ions for the former and strong parent ions for the latter. This loss of nitrogen in the 1-isomer ultimately gives rise to a strong peak at m/z 104, which is small or absent in the 2-isomer. In addition, examination of the intensity and distribution of peaks clustered around m/z 118 reveals that weak signals with a maximum intensity at m/z 117 or 118 are indicative of the 1-isomers, while strong signals with a maximum intensity at 119 or 120 are typical of the 2-isomers.Thus, isomers are distinguished by analysis of mass spectral cracking patterns. © 1997 John Wiley & Sons, Inc. Heteroatom Chem. 8: 459-464, 1997
    Additional Material: 5 Ill.
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  • 7
    Electronic Resource
    Electronic Resource
    Preparation and characterization of arsine derivatives: X-ray crystal structures of As (SitBuMe2)3, As (SiMe3)2(SiPh3), Et3Ga · As(SiMe3)2(SiPh3), and As(SePh)3 (1996)
    New York, NY [u.a.] : Wiley-Blackwell
    Heteroatom Chemistry 7 (1996), S. 409-416 
    Details
    ISSN: 1042-7163
    Keywords: Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: As(Si1BuMe2)3 (1) was prepared by the salt-elimination reaction between (Na/K)3As and 1BuMe2SiCl. Mixing LiAs(SiMe3)2 with Ph3SiCl (1:1) yielded As(SiMe3)2(SiPh3) (2) in a good crystalline yield. Reaction of 2 (1:1) with Et3Ga gave the expected Lewis acid-base adduct Et3Ga · As(SiMe3)2(SiPh3) (3). The 1:1 mole ratio reaction of In(SePh)3 with As(SiMe3)3 resulted in a ligand redistribution around the indium and arsenic centers to afford As(SePh)3 (4) in a low yield. The solid-state structures of 1-4 have been established by single-crystal X-ray analysis. Crystal data for 1, monoclinic space group P 21/c, with a = 11.112(2), b = 17.453(2), c = 14.199(2) Å, β = 114.89° for Z = 4; 2, orthorhombic space group P c21n, with a = 9.236(1), b = 16.612(2), c = 16.803(4) Å for Z = 4; 3, monoclinic space group P 21/c, with a = 16.799(1), b = 11.199(2), c = 19.413(3) Å, β = 112.22(1) for Z = 4; 4, trigonal space group R &3macr;, with a = 12.863(5), c = 18.96(1) Å for Z = 6. © 1996 John Wiley & Sons, Inc.
    Additional Material: 4 Ill.
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  • 8
    Electronic Resource
    Electronic Resource
    Synthesis and characterization of [(Me3SiCH2)2GaP(SiMe3)2]2, an example of a gallium-phosphorus dimer obtainable only through an indirect reaction pathwayDedicated to Prof. William E. McEwen on the occasion of his seventy-fifth birthday. (1998)
    New York, NY [u.a.] : Wiley-Blackwell
    Heteroatom Chemistry 9 (1998), S. 147-150 
    Details
    ISSN: 1042-7163
    Keywords: Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The dimeric gallium-phosphorus compound [(Me3Si-CH2)2GaP(SiMe3)2]2 (1) was prepared from the 1:1 mole ratio lithium-halide elimination reaction of (Me3SiCH2)2GaP(SiMe3)2Ga(CH2SiMe3)2Cl with LiP-(SiMe3)2 in benzene solution and has been characterized through multinuclear solution NMR, partial elemental analysis, and single-crystal X-ray analysis. Compound 1 could not be obtained from the direct reactions of (Me3SiCH2)2GaCl with P(SiMe3)3 or LiP(SiMe3)2. © 1998 John Wiley & Sons, Inc. Heteroatom Chem 9:147-150, 1998
    Additional Material: 1 Ill.
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  • 9
    Electronic Resource
    Electronic Resource
    Kinetics of the solvolysis of trans-dichlorotetra(4-t-butylpyridine)-cobalt(III) ions in mixtures of water with methanol and with ethanol (1995)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 27 (1995), S. 89-97 
    Details
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: For the solvolysis of Co(4-t-Bupy)4Cl2- ions in water + methanol and water + ethanol, log (rate constant) does not vary linearly with the reciprocal of the dielectric constant. The Gibbs free energy, the enthalpy, and the entropy of activation are insensitive to changes in the solvent composition in these mixtures, although a slight broad maximum in ΔH* and ΔS* probably exists at mole fractions of about 0.2 in water + ethanol. This contrasts with the extrema in ΔH* and ΔS* found with more hydrophobic alcohols used as cosolvents. However, the application of a Gibbs energy cycle to the solvolysis in water and in the mixtures shows that there is a differential effect of changes in solvent structure on the emergent solvated CoIII cation in the transition state and on Co(4-t-Bupy)4Cl2+ in the initial state. The stability of the former increases relative to that of the latter as the cosolvent content of the mixture rises. © 1995 John Wiley & Sons, Inc.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/kin.550270202
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  • 10
    Electronic Resource
    Electronic Resource
    The hydroxyl radical reaction rate constant and atmospheric transformation products of 2-butanol and 2-pentanol (1998)
    New York, NY : Wiley-Blackwell
    International Journal of Chemical Kinetics 30 (1998), S. 745-752 
    Details
    ISSN: 0538-8066
    Keywords: Chemistry ; Physical Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The relative rate technique has been used to measure the hydroxyl radical (OH) reaction rate constant of +2-butanol (2BU, CH3CH2CH(OH)CH3) and 2-pentanol (2PE, CH3CH2CH2CH(OH)CH3). 2BU and 2PE react with OH yielding bimolecular rate constants of (8.1±2.0)×10-12 cm3molecule-1s-1 and (11.9±3.0)×10-12 cm3molecule-1s-1, respectively, at 297±3 K and 1 atmosphere total pressure. Both 2BU and 2PE OH rate constants reported here are in agreement with previously reported values [1-4]. In order to more clearly define these alcohols' atmospheric reaction mechanisms, an investigation into the OH+alcohol reaction products was also conducted. The OH+2BU reaction products and yields observed were: methyl ethyl ketone (MEK, (60±2)%, CH3CH2C((DOUBLEBOND)O)CH3) and acetaldehyde ((29±4)% HC((DOUBLEBOND)O)CH3). The OH+2PE reaction products and yields observed were: 2-pentanone (2PO, (41±4)%, CH3C((DOUBLEBOND)O)CH2CH2CH3), propionaldehyde ((14±2)% HC((DOUBLEBOND)O)CH2CH3), and acetaldehyde ((40±4)%, HC((DOUBLEBOND)O)CH3). The alcohols' reaction mechanisms are discussed in light of current understanding of oxygenated hydrocarbon atmospheric chemistry. Labeled (18O) 2BU/OH reactions were conducted to investigate 2BU's atmospheric transformation mechanism details. The findings reported here can be related to other structurally similar alcohols and may impact regulatory tools such as ground level ozone-forming potential calculations (incremental reactivity) [5]. © 1998 John Wiley & Sons, Inc. Int J Chem Kinet 30: 745-752, 1998
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