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  • 1
    Electronic Resource
    Electronic Resource
    SIMS Depth Profiling of Delta-doped Layers in Silicon (1996)
    Chichester [u.a.] : Wiley-Blackwell
    Surface and Interface Analysis 24 (1996), S. 469-475 
    Details
    ISSN: 0142-2421
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Physics
    Notes: Boron and germanium δ-doped silicon samples were studied using SIMS depth profiling on a Cameca IMS-4F instrument with O2+, N2+ and Cs+ primary beams at various energies and incidence angles. The depth resolution characteristics were compared. We show that, with experimental conditions being the same, the N2+ primary beam provides for better decay lengths, while the leading edges of the profiles turn out to be significantly broadened because of the beam-induced roughness which develops at an early stage of silicon bombardment by N2+ ions. The influence of ripple-like roughness on the SIMS profile shape is considered within the present simple analytical model. The effect of a modified layer on the SIMS profile depth was experimentally investigated. For profiles obtained with an N2+ primary beam, it was shown that swelling of the modified layer produced by the implantation and trapping of primary particles shifts the profile as a whole toward the surface.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
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    Paper (German National Licenses)
  • 2
    Electronic Resource
    Electronic Resource
    Catalyzed chain transfer to monomer in free radical polymerization (1981)
    New York : Wiley-Blackwell
    Journal of Polymer Science: Polymer Chemistry Edition 19 (1981), S. 879-889 
    Details
    ISSN: 0360-6376
    Keywords: Physics ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Notes: The kinetics and the molecular weight distribution in the radical polymerization of methyl methacrylate in the presence of a cobalt complex of hematoporphyrin tetramethyl ether is investigated. The whole complex of experimental data indicates the new kinetic phenomenon - catalyzed chain transfer to monomer. The possible mechanism of the chain transfer and the chain transfer agent regeneration acts is suggested.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/pol.1981.170190403
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  • 3
    Electronic Resource
    Electronic Resource
    NMR analysis of distribution of chain lengths between crosslinks of polymer networks (1994)
    Bognor Regis [u.a.] : Wiley-Blackwell
    Journal of Polymer Science Part B: Polymer Physics 32 (1994), S. 1585-1592 
    Details
    ISSN: 0887-6266
    Keywords: NMR ; polymer networks ; distribution of chain lengths ; Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: A novel technique for the analysis of the distribution of chain lengths between crosslink junctions of polymer networks is proposed. The technique is based on the relation between the high-temperature nuclear magnetic resonance free-induction decay and the network structure. The distribution functions are determined for a number of networks. In particular, the evolution of structure of a thermally degrading network is studied. © 1994 John Wiley & Sons, Inc.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/polb.1994.090320901
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  • 4
    Electronic Resource
    Electronic Resource
    Enzyme immobilization on heparin (1978)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 12 (1978), S. 585-590 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: We describe the preparation and some of the properties of heparin-bound α-chymotrypsin that were obtained via activation of heparin with water-soluble carbodiimide. Immobilized enzyme has unchanged kinetic characteristics toward low-molecular-weight and macromolecular substrates. The heparin-bound enzymes could have a wide range of medical applications.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820120502
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  • 5
    Electronic Resource
    Electronic Resource
    Magnetic Sephadex as a carrier for enzyme immobilization and drug targeting (1985)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 19 (1985), S. 461-466 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820190410
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  • 6
    Electronic Resource
    Electronic Resource
    Immobilization of enzymes on slowly soluble carriers (1977)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 11 (1977), S. 223-235 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The preparation and some properties of microspheres composed of oxidized polysaccharides and some vinyl polymers are described. The microspheres contain immobilized enzyme and can be slowly solubilized in water solutions, thereby releasing active a enzyme into the surrounding medium. The kinetic characteristics of the immobilized enzyme bound with a fragment of matrix after complete solubilization are unchanged, but the enzyme exhibits high thermostability. These preparations could have a wide range of medical applications, e.g., to form a drug “depot” directly in an affected organ.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820110208
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  • 7
    Electronic Resource
    Electronic Resource
    Copolymerization of ethylene and vinyl chloride in the presence of Ziegler-Natta catalysts I. Interrelation between the synthesis conditions and the physicochemical properties of the resultant copolymers (1990)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 41 (1990), S. 178-185 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Die Homopolymerisation von Vinylchlorid und seine Copolymerisation mit Ethylen in Gegenwart katalytischer Systeme aus organischen Übergangsmetallverbindungen, wie (C5H5)2TiCl2, Vanadium-, Cobalt-, Nickel- und ChromAcetylacetonaten, sowie Ti(O—n-C4H9)4 kombiniert mit Al(C2H5)3, Al(C2H5)2Cl und Al(C2H5)Cl2 wird untersucht. Die Einflüsse des Lösungsmitteis, z. B. Heptan, Toluen, Benzen, Ethylchlorid und 1,2-Dichlorethan, auf den Verlauf der Copolymerisation in Gegenwart des katalytischen Systems Ti(O—n-C4H9)4/Al(C2H5)3-nCln sowie auf die physikalisch-chemischen Eigenschaften der erhaltenen Copolymere werden erörtert.
    Notes: The homopolymerization of vinyl chloride and its copolymerization with ethylene in the presence of catalytic systems composed of transition metal organic compounds such as (C5H5)2TiCl2, vanadium, cobalt, nickel and chromium acetylacetonates, Ti(O—n-C4H9)4 in combination with Al(C2H5)3, Al(C2H5)2Cl and Al(C2H5)Cl2 is studied. The effects of the solvent, e.g. heptane, toluene, benzene, ethyl chloride, and dichloroethane-1,2, on the process of copolymerization in the presence of the catalytic system Ti(O—n-C4H9)4/Al(C2H5)3-nCln and on the physicochemical properties of the resultant copolymers are considered.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1990.010410310
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  • 8
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    Maritime Aerosol Network (MAN) as a Component of AERONET (2008)
    In:  CASI
    Details
    Publication Date: 2018-06-06
    Description: The World Ocean produces a large amount of natural aerosols that have all impact on the Earth's albedo and climate. Sea-salt is the major contributor to aerosol optical depth over the oceans. [Mahowald et al. 2006; Chin et al. 2002; Satheesh et al. 1999; Winter and Chylek, 1997] and therefore affects the radiative balance over the ocean through the direct [Haywood et al. 1999] and indirect aerosol effect [O'Dowd et al. 1999]. Aerosols over the oceans (produced marine and advected from land sources) are important for various atmospheric processes [Lewis and Schwartz, 2004] and remote sensing studies [Gordon, 1997].
    Keywords: Geophysics
    Type: To be published in Journal of Geophysical Research - Atmospheres
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 9
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    MISR Global Aerosol Product Assessment by Comparison with AERONET (2010)
    In:  CASI
    Details
    Publication Date: 2018-06-06
    Description: A statistical approach is used to assess the quality of the MISR Version 22 (V22) aerosol products. Aerosol Optical Depth (AOD) retrieval results are improved relative to the early post- launch values reported by Kahn et al. [2005a], varying with particle type category. Overall, about 70% to 75% of MISR AOD retrievals fall within 0.05 or 20% AOD of the paired validation data, and about 50% to 55% are within 0.03 or 10% AOD, except at sites where dust, or mixed dust and smoke, are commonly found. Retrieved particle microphysical properties amount to categorical values, such as three groupings in size: "small," "medium," and "large." For particle size, ground-based AERONET sun photometer Angstrom Exponents are used to assess statistically the corresponding MISR values, which are interpreted in terms of retrieved size categories. Coincident Single-Scattering Albedo (SSA) and fraction AOD spherical data are too limited for statistical validation. V22 distinguishes two or three size bins, depending on aerosol type, and about two bins in SSA (absorbing vs. non-absorbing), as well as spherical vs. non-spherical particles, under good retrieval conditions. Particle type sensitivity varies considerably with conditions, and is diminished for mid-visible AOD below about 0.15 or 0.2. Based on these results, specific algorithm upgrades are proposed, and are being investigated by the MISR team for possible implementation in future versions of the product.
    Keywords: Geophysics
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    NASA TECHNICAL REPORTS
  • 10
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    Ion Velocity Distributions Within LLBL and Their Possible Implication to Multiple Reconnections (2003)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: We analyze two LLBL crossings made by Interball Tail satellite under southward or variable magnetosheath magnetic field: one crossing on the flank of the magnetosphere, and another one closer to the subsolar point. Three different types of ion velocity distributions within LLBL are observed: (a) D-shaped distributions, (b) ion velocity distributions consisting of two counter-streaming components of magnetosheath-ty and (c) distributions with three components one of which has nearly zero parallel velocity and two counter-streaming components. Only the (a) type fits to the single magnetic flux tube formed by reconnection between magnetospheric and magnetosheath magnetic fields. We argue that two counter-streaming magnetosheath-like ion components observed by Interball within LLBL cannot be explained by the reflection of the ions from the magnetic mirror deeper within magnetosphere. Types (b) and (c) ion velocity distributions would form within spiral magnetic flux tube consisting of a mixture of alternating segments originating from the magnetosheath and from magnetospheric plasma. The shapes of ion velocity distributions and their evolution with decreasing number density in LLBL indicate that a significant part of LLBL is located on magnetic field lines of long spiral flux tube islands at the magnetopause, as has been proposed and found to occur in magnetopause simulations. We consider these observations as evidence for multiple reconnection X-ray lines between magnetosheath and magnetospheric flux tubes.
    Keywords: Geophysics
    Format: text
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    NASA TECHNICAL REPORTS
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