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  • Springer  (201)
  • American Society of Hematology  (52)
  • Oxford University Press  (23)
  • 1990-1994  (237)
  • 1955-1959  (39)
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  • 1
    Digitale Medien
    Digitale Medien
    Symposium 11: Cellular and molecular basis of atherosclerosis (1990)
    Springer
    Fresenius' Zeitschrift für analytische Chemie 337 (1990), S. 41-43 
    Details
    ISSN: 1618-2650
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00325719
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    Artikel (Nationallizenzen)
    Volltext
  • 2
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    Symposium 11: Cellular and molecular basis of atherosclerosis (1990)
    Springer
    Details
    Publikationsdatum: 1990-01-01
    Print ISSN: 0937-0633
    Digitale ISSN: 1432-1130
    Thema: Chemie und Pharmazie
    Publiziert von Springer
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    AKTUELLE ARTIKEL
  • 3
    Digitale Medien
    Digitale Medien
    Determination of the substitution patterns of cellulose methyl ethers by HPLC and GLC-comparison of methods (1992)
    Springer
    Polymer bulletin 29 (1992), S. 349-356 
    Details
    ISSN: 1436-2449
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau , Physik
    Notizen: Summary The substitution patterns of methyl cellulose as well as of a thexyldimethylsilyl cellulose after permethylation were determined by hydrolysis and separation of the resulting partially methylated glucoses without further derivatization by h.p.l.c.. On an amine-modified silica column the solutes get separated into glucose, 2,3,6-tri-O-methyl glucose and the groups of mono-O-methyl-and di-O-methyl glucoses. A chromatographic run on a reversed-phase column enables the identification of the single mono-O-methyl- and di-O-methyl glucoses. In this way, a determination of both the average degree of substitution and the substitution pattern of cellulose derivatives is possible. Comparison of the results with those obtained by standard methylation analysis including g.l.c.-m.s. proves the correctnes of the method employed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00944830
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    Artikel (Nationallizenzen)
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  • 4
    Digitale Medien
    Digitale Medien
    Spatial variability and interpolation of daily precipitation amount (1992)
    Springer
    Stochastic environmental research and risk assessment 6 (1992), S. 209-221 
    Details
    ISSN: 1436-3259
    Schlagwort(e): geostatistics ; precipitation ; water balance models ; semivariogram ; kriging ; spatial variation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung , Energietechnik , Geographie , Geologie und Paläontologie
    Notizen: Abstract Daily precipitation amounts show spatial variation over sub-continential regions. Point measurements, representative for regions of land, have to be interpolated towards unobserved locations. In this study four days in 1984 were selected to investigate the spatial variability of daily precipitation amount in North-western Europe in relation to the meteorological conditions. Data were interpolated using Kriging. Crossvalidation was used to compare interpolated values with measured values. Large differences in the spatial structure of daily precipitation amount are obsered as a result of different meterological conditions. Stratification of the study area into a coastal, a mountainous and an interior stratum proved to be successful, reducing the Mean Squared Error of Prediction with up to 55%.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01581451
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  • 5
    Digitale Medien
    Digitale Medien
    Spatial variability and interpolation of daily precipitation amount (1992)
    Springer
    Stochastic environmental research and risk assessment 6 (1992), S. 304-320 
    Details
    ISSN: 1436-3259
    Schlagwort(e): geostatistics ; precipitation ; water balance models ; semivariogram ; kriging ; spatial variation
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Architektur, Bauingenieurwesen, Vermessung , Energietechnik , Geographie , Geologie und Paläontologie
    Notizen: Abstract Daily precipitation amounts show spatial variation over sub-continential regions. Point measurements, represntative for regions of land, have to be interpolated towards unobserved locations. In this study four days in 1984 were selected to investigate the spatial variability of daily precipitation amount in north-western Europe in relation to the meteorological conditions. Data were interpolated using kriging. Crossvalidation was used to compare interpolated values with measured values. Large differences in the spatial structure of daily precipitation amount are observed as a result of different meteorological conditions. Stratification of the study area into a coast, a mountain and an interior stratum proved to be successful, reducing the Mean Squared Error of Prediction with up to 55%.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01581623
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    Artikel (Nationallizenzen)
    Volltext
  • 6
    Digitale Medien
    Digitale Medien
    Mechanistic studies of platinum-catalyzed hydrosilylation (1991)
    Springer
    Journal of inorganic and organometallic polymers and materials 1 (1991), S. 325-334 
    Details
    ISSN: 1572-8870
    Schlagwort(e): Hydrosilylation ; addition cure ; platinum catalyst
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract The results of competitive and relative rate studies for various silicon hydrides and vinylmethylsiloxane compounds are presented. For example, the competitive reaction of bis(trimethylsiloxy)methylsilane with vinylpentamethyldisiloxane (A) and divinyltetramethyldisiloxane (B) show that B reacts preferentially; however, the relative rate of reaction is greater for A than B. Mechanistic aspects of hydrosilylation are also discussed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00702496
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    Artikel (Nationallizenzen)
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  • 7
    Digitale Medien
    Digitale Medien
    The network structure of silicone release coatings (1991)
    Springer
    Journal of inorganic and organometallic polymers and materials 1 (1991), S. 591-604 
    Details
    ISSN: 1572-8870
    Schlagwort(e): Silicone network structures ; epoxy silicones ; thermal-cure silicones
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Silicone release coatings are used by the pressure-sensitive adhesive industry for labeling applications. A background discussion of silicone release coatings is presented. Methodology for determining the network structure of photolytically cured systems prepared by the cationic ring opening polymerization of an epoxy silicone fluid is described. Under typical polymerization conditions, these networks contain no unreached epoxides and have very low degrees of polymerization (D p), indicating that termination is competitive with propagation. A method has also been developed to determine the network structure of thermally cured systems prepared by the platinum-catalyzed hydrosilylation of silicone vinyl compounds with silicone hydrides. The nature of the cross-links and the types of residual functionality have been determined and the systems have been shown to undergo a postcure.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00683519
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    Artikel (Nationallizenzen)
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  • 8
    Digitale Medien
    Digitale Medien
    On the reaction mechanism for propene formation in the MTO reaction over SAPO-34 (1993)
    Springer
    Catalysis letters 20 (1993), S. 329-336 
    Details
    ISSN: 1572-879X
    Schlagwort(e): SAPO-34 ; MTO ; MTG ; hydrocarbon formation from methanol ; reaction mechanism ; isotopic labeling
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie
    Notizen: Abstract Three different feeds: methanol, methanol/ethanol/water (2 ∶ 1 ∶ 1 molar ratio) and13C-methanol/ethanol/water (2 ∶ 1 ∶ 1) have been converted to hydrocarbons over a SAPO-34 catalyst at 420 °C using argon carrier gas. The products were analyzed by GC-MS allowing the determination of the isotopic composition of the reaction products. The experiments show that the majority of the propene molecules are formed directly from methanol, and that only a minor part is formed by methylation of ethene.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF00769305
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    Artikel (Nationallizenzen)
    Volltext
  • 9
    Digitale Medien
    Digitale Medien
    Approximate scenario solutions in the progressive hedging algorithm (1991)
    Springer
    Annals of operations research 31 (1991), S. 425-444 
    Details
    ISSN: 1572-9338
    Schlagwort(e): Stochastic programming ; discrete optimal control ; scenario aggregation ; dynamic optimization ; multistage decision making ; decomposition ; approximation ; fisheries models
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik , Wirtschaftswissenschaften
    Notizen: Abstract This paper describes how the scenario aggregation principle can be combined with approximate solutions of the individual scenario problems, resulting in a computationally efficient algorithm where two individual Lagrangian-based procedures are merged into one. Computational results are given for an example from fisheries management. Numerical experiments indicate that only crude scenario solutions are needed.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02204861
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  • 10
    Digitale Medien
    Digitale Medien
    Structural properties of the progressive hedging algorithm (1991)
    Springer
    Annals of operations research 31 (1991), S. 445-455 
    Details
    ISSN: 1572-9338
    Schlagwort(e): Stochastic programming ; scenario aggregation ; progressive hedging algorithm ; data structures ; generic algorithms
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik , Wirtschaftswissenschaften
    Notizen: Abstract This short note discusses some structural properties of the progressive hedging algorithm. It is based on the finite case, but allows for event trees that are unbalanced and where the nodes can have a varying number of children. Generic procedures and a generic record definition for the algorithms are presented.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF02204862
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    Artikel (Nationallizenzen)
    Volltext
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