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  • Articles  (90)
  • Wiley-Blackwell  (65)
  • BioMed Central  (25)
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  • Articles  (90)
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  • 1
    Electronic Resource
    Electronic Resource
    Über Holzkohle als Adsorptionsmittel für Gase (1928)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 174 (1928), S. 142-144 
    Details
    ISSN: 0863-1786
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19281740115
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  • 2
    Electronic Resource
    Electronic Resource
    Interlaboratory GC/MS response factor precision (1982)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 5 (1982), S. 27-30 
    Details
    ISSN: 0935-6304
    Keywords: Gas chromatography/mass spectrometry ; Capillary columns, fused silica ; Response factors, interlaboratory ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A quality control procedure for Fused Silica Capillary Column Gas Chromatography/Mass Spectroscopy (FSCC GC/MS) was tested and shown to produce similar response factors at five Spectroscopy (FSCC GC/MS) was tested and shown to produce similar response factors at five laboratories. The average relative standard deviation (RSD) of interlaboratory response factors for fifty three compounds of environmental interest determined at each laboratory at nominal injected weights of 20, 100, and 200 ng was found to be 18.9% for four of the five laboratories which participated in this work. These data demonstrate that similar response factors can be attained in routine GC/MS measurements when adequate quality control is maintained.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240050105
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  • 3
    Electronic Resource
    Electronic Resource
    Fused silica capillary column GC/MS for the analysis of priority pollutants (1981)
    Weinheim : Wiley-Blackwell
    Journal of High Resolution Chromatography 4 (1981), S. 366-384 
    Details
    ISSN: 0935-6304
    Keywords: GC/MS ; Capillary columns, fused silica ; Priority pollutants ; Quantitation ; Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Operational characteristics have been determined for fused silica capillary column (FSCC) GC/MS as applied to “extractable” priority polutants. Chromatographic data show excellent relative retention time (RRT) intralaboratory precision and interlaboratory accuracy when multiple internal standards are empolyed. Potential chromatographic problems, such as column overload and “double peaking”, are addressed. Response factor relative standard deviations (RSD) at 50 ng for most of the extractable priority pollutants over the long term indicated precise determination (i.e. RSD generally ≤ 10%). Linearity was demonstrated over two orders of magnitude for FSCC GC/MS analysis of compounds with relatively low and high RF (response factor) values. Potential quantitative problems, such as saturation, are discussed. For certain aromatic priority pollutants interlaboratory RF agreement was observed. This was noted as perhaps the most important property of FSCC GC/MS analysis when the multiple internal standard approach is utilized. Determinations of extractable priority pollutants are directly compared for paced column GC/MS and FSCC GC/MS analysis of separate and composited extracts. For six extracts analyzed in triplicate, the latter configuration was shown to produce more consistent results. In view of the superior analysis logistics of composite extract FSCC GC/MS analysis, this approach was established as the preferred method for the analysis of priority pollutants classified as extractable.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jhrc.1240040803
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  • 4
    Electronic Resource
    Electronic Resource
    On size dependent growth rate expressions (1969)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 15 (1969), S. 289-290 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690150230
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  • 5
    Electronic Resource
    Electronic Resource
    Use of time delays in packed gas absorption column simulation (1967)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 13 (1967), S. 1211-1213 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690130635
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  • 6
    Electronic Resource
    Electronic Resource
    On the stability of the incomplete Cholesky decomposition for a singular perturbed problem, where the coefficient matrix is not an M-matrix (1995)
    New York, NY [u.a.] : Wiley-Blackwell
    Numerical Linear Algebra with Applications 2 (1995), S. 17-28 
    Details
    ISSN: 1070-5325
    Keywords: Engineering ; Engineering General
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics
    Notes: The incomplete Cholesky decomposition is known as an excellent smoother in a multigrid iteration and as a preconditioner for the conjugate gradient method. However, the existence of the decomposition is only ensured if the system matrix is an M-matrix. It is well-known that finite element methods usually do not lead to M-matrices. In contrast to this restricting fact, numerical experiments show that, even in cases where the system matrix is not an M-matrix the behaviour of the incomplete Cholesky decomposition apparently does not depend on the structure of the grid. In this paper the behaviour of the method is investigated theoretically for a model problem, where the M-matrix condition is violated systematically by a suitable perturbation. It is shown that in this example the stability of the incomplete Cholesky decomposition is independent of the perturbation and that the analysis of the smoothing property can be carried through. This can be considered as a generalization of the results for the so called square-grid triangulation, as has been established by Wittum in [12] and [11].
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/nla.1680020103
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  • 7
    Electronic Resource
    Electronic Resource
    Synthese eines neuen Thienospirans: 6,7-Dihydro-1′-methyl-spiro[benzo[b]thiophen-4(5H),2′-piperidin] (1990)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 332 (1990), S. 995-1003 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of a New Thienospiran: 6,7-Dihylro-1′-methyl-spiro[benzo[j]thioxhen-4(5H),2′-piperidine]The title spiro compound 6 - a N-methyl derivative of a new parent system - has been synthesized from nitrile 8 via 4-phenoxybutylation, followed by modified Schmidt degradation, ensuing O-deprotection and final cyclization. The constitution of the target compound and of all intermediates is established by 1H-n.m.r. and 13C-n.m.r.-spectroscopy and by microelementary analysis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19903320616
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  • 8
    Electronic Resource
    Electronic Resource
    Eine neue Synthese von Benzo[b]naphtho[2,3-d]thiophenenHerrn Professor Dr. Karl Gewald mit besten Wünschen zum 60. Geburtstag (1990)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 332 (1990), S. 1099-1101 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: A New Synthesis of Benzo[b]naphtho[2,3-d]thiophenes
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19903320631
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  • 9
    Electronic Resource
    Electronic Resource
    Synthesen neuer Chinolon-Chemotherapeutika. V [5] Methodische Untersuchungen zur Synthese von Chinoloncarbonsäuren (1991)
    New York, NY : Wiley-Blackwell
    Journal für Praktische Chemie/Chemiker-Zeitung 333 (1991), S. 267-279 
    Details
    ISSN: 0021-8383
    Keywords: Chemistry ; Organic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: Synthesis of Novel Quinolone-Chemotherapeutics. V. Methodical Investigations on the Synthesis of Quinolone Chemotherapeutics.The synthesis of 6, 7-dihalogen-N-ethyl-4-oxo-l, 4-dihydroquinoline-3-carboxylic acids (3a, b) from 3, 4-dihalogen-anilines is a three-step processes: (a) N-ethylation, (b) reaction with ortho formic ester and Meldrum's acid, (c) intramolecular cyclization. An increase of the total yields in comparison with known methods is mainly connected with the third step. Here the Meldrum's method allows reactions in solution at temperatures ≥ 100°C. With application of special Lewis acids the 6, 7-dihalogen-substituted products are formed in relatively high yields (6, 7-difluoro-l-ethyl-4-oxo-1, -4-dihydro-quinoline-3-carboxylic acia (3a): 71%; 7-chloro-6-fluoro-1 -ethyl-4-oxo-1, 4-dihydro quinoline-3-carboxylic acid (3b): 60%) without impurities of the corresponding 5, 6-dihalogen substituted isomers. Anhydrides (5) of 4-oxo-1, 4-dihydro-quinolone-3-carboxylic acids with dibromo and difluoro-boric acid were synthesized and shown to facilitate the aromatic nucleophilic substitution. The kinetics of two reactions (5a → 6 and 3b → 7) were determined and relative reaction rates established.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prac.19913330211
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  • 10
    Electronic Resource
    Electronic Resource
    Blood and tissue compatibility of modified polyester: Thrombosis, inflammation, and healing (1998)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 39 (1998), S. 130-140 
    Details
    ISSN: 0021-9304
    Keywords: vascular graft ; Fluoropassivated ; inflammation ; healing ; thrombosis ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Poly(ethylene terephthalate) (PET) has been reported in literature to be moderately inflammatory and thrombogenic. To moderate the inflammatory response, PET fabric was surface modified by either Fluoropassiv™ fluoropolymer (FC), or an RGD-containing peptide (RGD). Samples were subsequently autoclave sterilized and implanted subcutaneously in Sprague Dawley rats for 2 to 4 weeks. Retrieved samples were evaluated histopathologically for indications of material toxicity and healing. Minimal acute or chronic inflammation was associated with the fabrics after 2 and 4 week implant duration. However, fibroblast proliferation into FC modified fabric (PET/FC) was less than that into unmodified (PET) and RGD modified fabric (PET/RGD) after 4 weeks, suggesting that FC modification of PET may inhibit excessive tissue growth. Additional samples of modified and unmodified fabrics were placed in stainless steel mesh cages, which were then implanted subcutaneously for 4 weeks. Cellular exudate was extracted weekly and cell concentrations within the exudate measured. Total leukocyte count (TLC) (reflective of local inflammation) at 1 week for PET/RGD was greater than that for PET/FC and PET. TLCs after 4 week implant decreased for all sample groups. In a separate experiment, PET vascular grafts surface modified by either FC or RGD were contacted 1h with blood using the baboon arteriovenous (AV) shunt model of thrombosis in both the presence and absence of heparin. Accumulation of 111In labeled platelets (reflective of thrombus accumulation) upon grafts was less in the presence of heparin (effect significant at p = 1.2 × 10-6, two-way ANOVA). Accumulation (in the presence of heparin) upon PET/RGD was less (p = 0.19), and upon PET/FC significantly less (p = 0.016) than that upon the unmodified PET control, suggesting that FC modification of PET may inhibit thrombus accumulation. © 1998 John Wiley & Sons, Inc. J Biomed Mater Res, 39, 130-140, 1998.
    Additional Material: 5 Ill.
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