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  • Hindawi Limited  (3)
  • 1
    In: International Journal of Photoenergy, Hindawi Limited, Vol. 2014 ( 2014), p. 1-8
    Abstract: Disordered intermolecular interaction carbon nitride precursor prepared by water-assisted grinding of dicyandiamide was used for synthesis of g-C 3 N 4 . The final sample possesses much looser structure and provides a broadening optical window for effective light harvesting and charge separation efficiency, which exhibits significantly improved H 2 evolution by photocatalytic water splitting. The bottom-up mechanochemistry method opens new vistas towards the potential applications of weak interactions in the photocatalysis field and may also stimulate novel ideas completely different from traditional ones for the design and optimization of photocatalysts.
    Type of Medium: Online Resource
    ISSN: 1110-662X , 1687-529X
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2014
    detail.hit.zdb_id: 2028941-8
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  • 2
    In: Evidence-Based Complementary and Alternative Medicine, Hindawi Limited, Vol. 2014 ( 2014), p. 1-10
    Abstract: Background and Objectives . Oxidative stress can initiate endothelial dysfunction and atherosclerosis. This study evaluated whether tetramethylpyrazine (TMP), the predominant active ingredient in Rhizoma Ligustici Wallichii (chuanxiong), prevents endothelial dysfunction in a rat model of oxidative stress. Methods . Isolated rat aortic rings were pretreated with various drugs before the induction of endothelial dysfunction by hydrogen peroxide (H 2 O 2 ). Changes in isometric tension were then measured in acetylcholine- (ACh-) relaxed rings. Endothelial nitric oxide synthase (eNOS) expression was evaluated in the rings by Western blotting, and superoxide anion ( O 2 ∙ - ) content was assessed in primary rat aortic endothelial cells by dihydroethidium- (DHE-) mediated fluorescence microscopy. Results . ACh-induced endothelium-dependent relaxation (EDR) was disrupted by H 2 O 2 in endothelium-intact aortic rings. H 2 O 2 -impaired relaxation was ameliorated by acute pretreatment with low concentrations of TMP, as well as by pretreatment with catalase and the NADPH oxidase inhibitors, apocynin and diphenyleneiodonium (DPI). TMP, apocynin, and DPI also reduced O 2 ∙ - accumulation in endothelial cells,but TMP failed to alter eNOS expression in aortic rings incubated with H 2 O 2 . Conclusions . TMP safeguards against oxidative stress-induced endothelial dysfunction, suggesting that the agent might find therapeutic utility in the management of vascular diseases. However, TMP’s role in inhibiting NADPH oxidase and its vascular-protective mechanism of action requires further investigation.
    Type of Medium: Online Resource
    ISSN: 1741-427X , 1741-4288
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2014
    detail.hit.zdb_id: 2148302-4
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  • 3
    Online Resource
    Online Resource
    Hindawi Limited ; 2016
    In:  Journal of Nanomaterials Vol. 2016 ( 2016), p. 1-15
    In: Journal of Nanomaterials, Hindawi Limited, Vol. 2016 ( 2016), p. 1-15
    Abstract: TiO 2 -based materials have been widely studied in the field of photocatalysis, sensors, and solar cells. Besides that, TiO 2 -based materials are of great interest for energy storage and conversion devices, in particular rechargeable lithium ion batteries (LIBs). TiO 2 has significant advantage due to its low volume change ( 〈 4%) during Li ion insertion/desertions process, short paths for fast lithium ion diffusion, and large exposed surface offering more lithium insertion channels. However, the relatively low theoretical capacity and electrical conductivity of TiO 2 greatly hampered its practical application. Various strategies have been developed to solve these problems, such as designing different nanostructured TiO 2 to improve electronic conductivity, coating or combining TiO 2 with carbonaceous materials, incorporating metal oxides to enhance its capacity, and doping with cationic or anionic dopants to form more open channels and active sites for Li ion transport. This review is devoted to the recent progress in enhancing the LIBs performance of TiO 2 with various synthetic strategies and architectures control. Based on the lithium storage mechanism, we will also bring forward the existing challenges for future exploitation and development of TiO 2 -based anodes in energy storage, which would guide the development for rationally and efficiently designing more efficient TiO 2 -based LIBs anodes.
    Type of Medium: Online Resource
    ISSN: 1687-4110 , 1687-4129
    Language: English
    Publisher: Hindawi Limited
    Publication Date: 2016
    detail.hit.zdb_id: 2229480-6
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