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  • Online-Ressource  (2)
  • Hindawi Limited  (2)
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  • Hindawi Limited  (2)
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  • 1
    Online-Ressource
    Online-Ressource
    Hindawi Limited ; 2014
    In:  Advances in Condensed Matter Physics Vol. 2014 ( 2014), p. 1-6
    In: Advances in Condensed Matter Physics, Hindawi Limited, Vol. 2014 ( 2014), p. 1-6
    Kurzfassung: Anatase TiO 2 nanosheet porous films were prepared by calcination of the orthorhombic titanic acid films at 400°C. They showed an excellent photocatalytic activity for CO 2 photoreduction to methane, which should be related to their special porous structure and large Brunauer-Emmett-Teller (BET) surface area. In order to further improve the photocatalytic activity, Pt nanoparticles were loaded uniformly with the average size of 3-4 nm on TiO 2 porous films by the photoreduction method. It was found that the loading of Pt expanded the light absorption ability of the porous film and improved the transformation efficiency of CO 2 to methane. The conversion yield of CO 2 to methane on Pt/TiO 2 film reached 20.51 ppm/h·cm 2 . The Pt/TiO 2 nanosheet porous film was characterized by means of X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscope (TEM), and ultraviolet-visible light diffuse reflectance spectra (UV-vis DRS). Moreover, the transient photocurrent-time curves showed that the Pt/TiO 2 nanosheet porous film exhibited higher photocurrent, indicating that the higher separation efficiency of the photogenerated charge carriers was achieved.
    Materialart: Online-Ressource
    ISSN: 1687-8108 , 1687-8124
    Sprache: Englisch
    Verlag: Hindawi Limited
    Publikationsdatum: 2014
    ZDB Id: 2501251-4
    Standort Signatur Einschränkungen Verfügbarkeit
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  • 2
    In: BioMed Research International, Hindawi Limited, Vol. 2014 ( 2014), p. 1-15
    Kurzfassung: Introduction . The systematic meta-analysis of randomized controlled trials (RCTs) evaluated the effects of intraoperative ulinastatin on early-postoperative recovery in patients undergoing cardiac surgery. Methods. RCTs comparing intraoperative ulinastatin with placebo in cardiac surgery were searched through PubMed, Cochrane databases, Medline, SinoMed, and the China National Knowledge Infrastructure (1966 to May 20th, 2013). The primary endpoints included hospital mortality, postoperative complication rate, length of stay in intensive care unit, and extubation time. The physiological and biochemical parameters illustrating postoperative cardiac and pulmonary function as well as inflammation response were considered as secondary endpoints. Results. Fifteen RCTs (509 patients) met the inclusion criteria. Ulinastatin did not affect hospital mortality, postoperative complication rate, or ICU length of stay but reduced extubation time. Ulinastatin also increased the oxygenation index on postoperative day 1 and reduced the plasma level of cardiac troponin-I. Additionally, ulinastatin inhibited the increased level of tumor necrosis factor-alpha, polymorphonuclear neutrophil elastase, interleukin-6, and interleukin-8 associated with cardiac surgery. Conclusion. Ulinastatin may be of value for the inhibition of postoperative increased inflammatory agents and most likely provided pulmonary protective effects in cardiac surgery. However, larger adequately powered RCTs are required to define the clinical effect of ulinastatin on postoperative outcomes in cardiac surgery.
    Materialart: Online-Ressource
    ISSN: 2314-6133 , 2314-6141
    Sprache: Englisch
    Verlag: Hindawi Limited
    Publikationsdatum: 2014
    ZDB Id: 2698540-8
    Standort Signatur Einschränkungen Verfügbarkeit
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