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  • SAGE Publications  (4)
  • English  (4)
  • 2000-2004  (4)
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  • SAGE Publications  (4)
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  • English  (4)
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  • 2000-2004  (4)
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  • 1
    Online Resource
    Online Resource
    Cure Behaviour and Structure of Dicyanate-Epoxy Novolac Blends
    SAGE Publications ; 2002
    In:  Polymers and Polymer Composites Vol. 10, No. 3 ( 2002-03), p. 237-248
    Details
    In: Polymers and Polymer Composites, SAGE Publications, Vol. 10, No. 3 ( 2002-03), p. 237-248
    Abstract: The cure characteristics of bisphenol A dicyanate-novolac epoxy resin blends were investigated by gel time determination and dynamic DSC. The effects of the proportion on the structures of cured blends were investigated by FTIR. In situ FTIR was utilized to study the curing mechanism and curing kinetics. The results indicated the distinct catalytic effects of the novolac epoxy resin on the curing of bisphenol A dicyanate. Due to considerable amounts of unepoxidized phenol present in the novolac epoxy resin, the reactions between phenol and cyanate disturbed the formation of the co-reaction products. The curing reactions of the blends indicated by in situ FTIR did not follow the Bauer mechanism totally. A composite mechanism of triazine-epoxy insertion and epoxy-cyanate reaction indwells in the systems. The authors suggest that most of the oxazolidinone present in the blends is formed by isomerization of oxazoline rather than by insertion of epoxy into isocyanurate. The amount of epoxy resin in the blend did not alter the curing mechanism, but had significant effects on the kinetic behaviour.
    Type of Medium: Online Resource
    ISSN: 0967-3911 , 1478-2391
    URL: Article
    DOI: 10.1177/096739110201000306
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2002
    detail.hit.zdb_id: 2099644-5
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Guaranteed cost control of uncertain discrete-time delay systems using dynamic output feedback
    SAGE Publications ; 2002
    In:  Transactions of the Institute of Measurement and Control Vol. 24, No. 5 ( 2002-12), p. 417-430
    Details
    In: Transactions of the Institute of Measurement and Control, SAGE Publications, Vol. 24, No. 5 ( 2002-12), p. 417-430
    Abstract: Guaranteed cost control problems for discrete-time systems with uncertainties and time delays are addressed in this paper. The delays may simultaneously appear not only in the state, but in control input and measurement output. Also, parametric uncertainties may exist in all system matrices of the systems considered in this paper. First, a new linear matrix inequality (LMI)-based approach is developed to construct dynamic guaranteed cost controllers for delay systems without uncertainties. Then this result is extended to discrete-time delay systems with uncertainties in linear fractional form in all system matrices. The solvability of these robust control problems for uncertain delay systems can be reduced to that for certain auxiliary systems without uncertainty. Numerical examples are provided to show the effectiveness of our approach.
    Type of Medium: Online Resource
    ISSN: 0142-3312 , 1477-0369
    URL: Article
    DOI: 10.1191/0142331202tm064oa
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2002
    detail.hit.zdb_id: 2025882-3
    SSG: 3,2
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  • 3
    Online Resource
    Online Resource
    Synthetic Effects on Site Symmetry and Photoluminescence Properties of Eu-Doped ZnS Semiconductor Nanoparticles
    SAGE Publications ; 2002
    In:  Journal of Chemical Research Vol. 2002, No. 7 ( 2002-07), p. 348-350
    Details
    In: Journal of Chemical Research, SAGE Publications, Vol. 2002, No. 7 ( 2002-07), p. 348-350
    Abstract: Eu-doped ZnS semiconductor nanoparticles were successfully prepared by using a new method – single-phase precipitation and solid-state reaction.
    Type of Medium: Online Resource
    ISSN: 1747-5198 , 2047-6507
    URL: Article
    DOI: 10.3184/030823402103172248
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2002
    detail.hit.zdb_id: 3010810-X
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  • 4
    Online Resource
    Online Resource
    Selective Repopulation of Mice Liver after Fas-Resistant Hepatocyte Transplantation
    SAGE Publications ; 2001
    In:  Cell Transplantation Vol. 10, No. 4-5 ( 2001-05), p. 353-361
    Details
    In: Cell Transplantation, SAGE Publications, Vol. 10, No. 4-5 ( 2001-05), p. 353-361
    Abstract: Hepatocyte transplantation has been proposed as a potential therapeutic method to treat irreversible liver failure and inherited hepatic disorders, although transplanted cells do not easily reconstruct the liver tissue under intact conditions. This study was aimed at modulating the recipient liver conditions to promote repopulation of the liver after hepatocyte transplantation. Hepatocytes isolated from male MRL-lpr/lpr (lpr) mice with a mutation of Fas antigen were transplanted in a number of 1 × 106 cells in female MRL-+/+ (wildtype mice) by intrasplenic injection. An agonistic anti-Fas antibody (0.15 mg/kg) was administered intravenously 24 h after cell transplantation. We also administrated the antibody at 0.3 mg/kg 1 week after grafting and at 0.6 mg/kg 2 weeks after transplantation. The liver specimens were taken at different time intervals for histological examination. The reconstructed male lpr hepatocytes in the female wild-type mice were determined by a real-time quantitative PCR assay using the primers and probe for the sry gene. The pathologic findings of the recipient livers after treatment with anti-Fas antibody revealed a large number of apoptotic hepatocytes. The grafted lpr hepatocytes were observed to reconstruct as much as 6.9% of the recipient liver in the anti-Fas antibody-treated group 3 months after transplantation. In contrast, we observed the transplanted cells at lower than 0.1% in the nontreated livers. These findings demonstrated that repeated induction of apoptosis in recipient hepatocytes shifts the environment of the liver to a regenerative condition. This method may be useful to promote the reconstruction of transplanted hepatocytes in a recipient liver.
    Type of Medium: Online Resource
    ISSN: 0963-6897 , 1555-3892
    URL: Article
    DOI: 10.3727/000000001783986701
    Language: English
    Publisher: SAGE Publications
    Publication Date: 2001
    detail.hit.zdb_id: 2020466-8
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