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  • 1
    Language: English
    In: Journal of Colloid And Interface Science, March 1, 2013, Vol.393, p.92(5)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.jcis.2012.10.065 Byline: Lihua Gao (a), Qingling Sun (a), Kezhi Wang (b) Keywords: Polyoxometalate; Hemicyanine; Self-assembled film; Photoelectrochemical property Abstract: Display Omitted Author Affiliation: (a) Department of Chemistry, School of Science, Beijing Technology and Business University, Beijing 100048, China (b) College of Chemistry, Beijing Normal University, Beijing 100875, China Article History: Received 4 September 2012; Accepted 25 October 2012
    ISSN: 0021-9797
    Source: Cengage Learning, Inc.
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  • 2
    Language: English
    In: Colloids and Surfaces A: Physicochemical and Engineering Aspects, April 20, 2013, Vol.423, p.162(8)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.colsurfa.2013.02.006 Byline: Lihua Gao (a), Qingling Sun (a), Xiaoyan Lin (a), Jianmin Qi (a), Kezhi Wang (b) Abstract: Three electrostatically self-assembled films made of [P.sub.2W.sub.18Zn.sub.4(H.sub.2O).sub.2O.sub.68].sup.10- (P.sub.2W.sub.18Zn.sub.4) and a hemicyanine dimer linked by varied alkyl chain lengths, were uniformly prepared with large bathochromic shifts compared to the hemicyanine aqueous solutions. A 3-layer film gave stable, large cathodic photocurrent densities of 13.7[mu]A/cm.sup.2 at an applied potential of -0.3V vs. saturated calomel electrode. Display Omitted Author Affiliation: (a) Department of Chemistry, School of Science, Beijing Technology and Business University, Beijing 100048, People's Republic of China (b) College of Chemistry, Beijing Normal University, and Beijing Key Laboratory of Energy Conversion and Storage Materials, Beijing 100875, People's Republic of China Article History: Received 9 December 2012; Revised 27 January 2013; Accepted 2 February 2013
    Keywords: Alkyl Groups -- Analysis
    ISSN: 0927-7757
    Source: Cengage Learning, Inc.
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  • 3
    Language: English
    In: Surface & Coatings Technology, August 25, 2015, Vol.276, p.424(7)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.surfcoat.2015.06.033 Byline: Lihua Gao, Hongbo Guo, Liangliang Wei, Chenyi Li, Huibin Xu Abstract: Plasma spray physical vapor deposition (PS-PVD) was used to deposit yttria stabilized zirconia (YSZ) coatings with microstructures varying from dense lamellae to quasi-columns out of vapor, as well as hybrid microstructure resulting from liquid droplet and vapor co-deposition. Among the coatings investigated, the quasi-columnar coating exhibited the lowest thermal conductivity of around 1.1W/mK at 1200[degrees]C due to high porosity and defects. The quasi-columnar coating also had an average life of around 2000cycles during flame shock testing with a coating surface temperature of ~1200[degrees]C. The failure of the coating occurred through cracking at the interface between the thermally grown oxide (TGO) layer and YSZ top coat. Article History: Received 11 April 2015; Revised 26 May 2015; Accepted 16 June 2015
    Keywords: Coatings
    ISSN: 0257-8972
    Source: Cengage Learning, Inc.
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  • 4
    Language: English
    In: Applied Physics Letters, 29 July 2013, Vol.103(5)
    Description: Size and composition-dependences of band gap energies are important properties for nanocrystal semiconductors, and have attracted extensive attentions for the last two decades. In this letter, a simple method of band gap prediction for nanocrystal alloys is developed. The band gaps of II–VI semiconductor homogeneous alloys with zinc blende and wurtzite structure, such as zb-(ZnS) x (CdS) 1−x , zb-(CdS) x (CdSe) 1−x , zb-(ZnSe) x (CdSe) 1−x , w-(ZnS) x (CdS) 1−x , w-(ZnSe) x (CdSe) 1−x , and w-(CdSe) x (CdTe) 1−x nanocrystal alloys, are calculated. The calculated results are in good agreement with the available experimental data. It provides insights into the effects of structure, size, and composition on the band gap.
    Keywords: Nanoscale Science And Technology
    ISSN: 0003-6951
    E-ISSN: 1077-3118
    Source: © 2013 AIP Publishing LLC (AIP)〈img src=http://exlibris-pub.s3.amazonaws.com/AIP_edited.gif style="vertical-align:middle;margin-left:7px"〉
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  • 5
    Language: English
    In: Journal of Alloys and Compounds, 2011, Vol.509(24), pp.6876-6879
    Description: ► The calculated isomer shift of YFeO was in agreement with its measurement value. ► The hardness of YFeO was predicted, which is also in agreement with the experimental value. ► The tendencies of hardness of REFeO changing along the rare earth elements sequence are monotone increasing. The chemical bond parameters of the rare earth iron orthoferrites were calculated using the chemical bond dielectric theory of complex structural crystals. The environment factor defined by electron polarizabilities and covalency was employed to calculate Mossbauer isomer shift of REFeO . The calculated isomer shift of YFeO was in agreement with its measurement value. The hardness of YFeO was predicted, which is also in agreement with the experimental value.
    Keywords: Rare Earth Orthoferrites ; Bond ; Isomer Shift ; Hardness ; Engineering ; Chemistry ; Physics
    ISSN: 0925-8388
    E-ISSN: 1873-4669
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  • 6
    Language: English
    In: 2014, Vol.9(8), p.e104674
    Description: CMG2-Fc is a fusion protein composed of the extracellular domain of capillary morphogenesis protein 2 (CMG2) and the Fc region of human immunoglobulin G; CMG2-Fc neutralizes anthrax toxin and offers protection against Bacillus anthracis challenge. To enhance the efficacy of CMG2-Fc against anthrax toxin, we attempted to engineer a CMG2-Fc with an improved affinity for PA. Using the automatic design algorithm FoldX and visual inspection, we devised two CMG2-Fc variants that introduce mutations in the CMG2 binding interface and improve the computationally assessed binding affinity for PA. An experimental affinity assay revealed that the two variants showed increased binding affinity, and in vitro and in vivo toxin neutralization testing indicated that one of these mutants (CMG2-Fc(E117Q)) has superior activity against anthrax toxin and was suitable for further development as a therapeutic agent for anthrax infections. This study shows that the computational design of the PA binding interface of CMG2 to obtain CMG2-Fc variants with improving anti-toxin abilities is viable. Our results demonstrate that computational design can be further applied to generate other CMG2-Fc mutants with greatly improved therapeutic efficacy.
    Keywords: Research Article ; Biology And Life Sciences ; Medicine And Health Sciences ; Physical Sciences
    E-ISSN: 1932-6203
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  • 7
    Language: English
    In: Journal of colloid and interface science, 2013, Vol.393, pp.92-96
    Description: A series of photoelectric conversion films consisting of sandwich-type polyoxometalates [P₂W₁₈M₄(H₂O)₂O₆₈]¹⁰⁻ (P₂W₁₈M₄, M=Ni, Cu, Zn) and a bichromophore hemicyanine of (E)-1,1′-(hexane-1,6-diyl)bis(4-(4-(dimethylamino)styryl)pyridinium) bromide (H⁶) were prepared on quartz and indium–tin–oxide (ITO)-coated glass substrates by electrostatic self-assembly. The UV–visible absorption spectroscopy showed that the films were uniformly deposited with the visible absorption bands for H⁶ in the films exhibiting different extents of bathochromic shifts with respect to H⁶ aqueous solution. The (P₂W₁₈M₄/H⁶)ₙ films exhibited cathodic photocurrents as irradiated with white light. The photocurrent action spectra were found to match with the absorption spectra of the films, indicating that the cathodic photocurrents were generated based on intramolecular charge transfer excitation of the H⁶ in the films. The photocurrents were found to strongly depend on the transition metal ions M in (P₂W₁₈M₄/H⁶)ₙ films. The effects of applied bias voltages, electron acceptor added in the electrolyte, and layer numbers of the films on photocurrent generation of (P₂W₁₈M₄/H⁶)ₙ films were also examined, and photoelectric mechanism discussed. ; p. 92-96.
    Keywords: Zinc ; Electric Power ; Absorption ; Copper ; Metal Ions ; Glass ; Quartz ; Electrolytes ; Aqueous Solutions ; White Light ; Spectroscopy
    ISSN: 0021-9797
    Source: AGRIS (Food and Agriculture Organization of the United Nations)
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  • 8
    Language: English
    In: Journal of Colloid And Interface Science, 01 March 2013, Vol.393, pp.92-96
    Description: ► Electrostatically self-assembled films from polyoxometalates and hemicyanine. ► Transition metals in polyoxometalates strongly affected large cathodic photocurrents. ► Bathochromic shift in the visible absorption band of the films. A series of photoelectric conversion films consisting of sandwich-type polyoxometalates [P W M (H O) O ] (P W M , M = Ni, Cu, Zn) and a bichromophore hemicyanine of ( )-1,1′-(hexane-1,6-diyl)bis(4-(4-(dimethylamino)styryl)pyridinium) bromide (H ) were prepared on quartz and indium–tin–oxide (ITO)-coated glass substrates by electrostatic self-assembly. The UV–visible absorption spectroscopy showed that the films were uniformly deposited with the visible absorption bands for H in the films exhibiting different extents of bathochromic shifts with respect to H aqueous solution. The (P W M /H ) films exhibited cathodic photocurrents as irradiated with white light. The photocurrent action spectra were found to match with the absorption spectra of the films, indicating that the cathodic photocurrents were generated based on intramolecular charge transfer excitation of the H in the films. The photocurrents were found to strongly depend on the transition metal ions M in (P W M /H ) films. The effects of applied bias voltages, electron acceptor added in the electrolyte, and layer numbers of the films on photocurrent generation of (P W M /H ) films were also examined, and photoelectric mechanism discussed.
    Keywords: Polyoxometalate ; Hemicyanine ; Self-Assembled Film ; Photoelectrochemical Property ; Engineering ; Chemistry
    ISSN: 0021-9797
    E-ISSN: 1095-7103
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  • 9
    Language: English
    In: Journal of Applied Polymer Science, Feb, 2014, Vol.131(4), p.n/a(8)
    Description: Byline: Xiaoyan Lin, Lihua Gao, Xi Chen, Jianmin Qi, Kezhi Wang Keywords: films; optical and photovoltaic applications; optical properties ABSTRACT In this article, we report on electrostatically self-assembled thin films prepared by the alternative immersion of quartz-coated and indium tin oxide coated glass substrates in aqueous solutions of a copolymer of poly(4-styrenesulfonic acid-co-maleic acid) (PSSMA) and a hemicyanine of (E)-1,1a[sup.2]-(propane-1,3-diyl)bis{4-[4-(dimethylamino)styryl]pyridinium} bromide (H.sub.3Br.sub.2). The films were studied by means of ultraviolet-visible absorption and X-ray photoelectron spectroscopies, scanning electron microscopy, and photoelectrochemical measurements. When irradiated with white light, the PSSMA/H.sub.3 monolayer film gave a stable cathodic photocurrent. The effects of the applied bias voltages, layer numbers of the (PSSMA/H.sub.3).sub.n films (where n stands for the number of bilayer films on both sides of the substrates), light intensities, pH value, and electron acceptor on the photocurrent generation of the (PSSMA/H.sub.3).sub.n film were examined. [c] 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014, 131, 39871. Supporting information: Additional Supporting Information may be found in the online version of this article Additional Supporting Information may be found in the online version of this article. CAPTION(S): Supporting Information
    Keywords: Biphenyl (Compound) -- Optical Properties ; Thin Films -- Optical Properties ; Bromine Compounds -- Optical Properties ; Copolymers -- Optical Properties
    ISSN: 0021-8995
    E-ISSN: 10974628
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  • 10
    Language: English
    In: Biomaterials, July, 2013, Vol.34(22), p.5689(11)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.biomaterials.2013.03.047 Byline: Feifei Yang, Wei Huang, Yunfei Li, Shan Liu, Mingji Jin, Yuli Wang, Lihua Jia, Zhonggao Gao Abstract: Recently, survivin has been attracting great attention because it plays an important role in inhibiting the apoptosis process of tumor cells. Down-regulating the expression of survivin gene by small interfering RNA (siRNA) offers a promising method for anti-tumor therapy. However, lack of appropriate siRNA delivery vector has significantly hindered the successful application of survivin-targeted siRNA in anti-tumor therapy. The purpose of this study was to use polysaccharide vector TAT-g-CS we synthesized to deliver functional siRNA and evaluate its in vivo anti-tumor activity. TAT-g-CS vector was firstly synthesized and well structurally characterized. MTT assay showed that TAT-g-CS vector exhibited good biocompatibility. TAT-g-CS complexed with siRNA offering nanoparticles with an average particle size of 212.2 nm and a polydispersity index of 0.121, and the zeta potential of the nanoparticles was +18.58 mV. Results from reporter gene assay suggested that luciferase-targeted siRNA when delivered by TAT-g-CS could down-regulate the expression of luciferase gene with 75.3% reduction. Most importantly, we use siRNA.sup.Sur targeting survivin gene to assess the in vitro and in vivo delivery capacity of TAT-g-CS and its anti-tumor effects. Our results demonstrated that TAT-g-CS/siRNA.sup.Sur nanoparticles not only strongly inhibited the in vitro proliferation of 4T1-Luc tumor cells via inducing cell apoptosis, but also effectively inhibited the in vivo growth and metastasis of malignant breast tumor, which suggested that TAT-g-CS/siRNA nanoparticle was a highly efficient non-viral system for siRNA delivery, especially for anti-tumor therapy based on siRNA therapeutics. Author Affiliation: (a) State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China (b) Department of Pharmaceutics, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, PR China (c) Yanbian University, Yanji 133000, PR China (d) Beijing Institute of Pharmacology and Toxicology, Academy of Military Medical Sciences, Beijing 100850, PR China (e) 307 Hospital, PLA, Academy of Military Medical Sciences, Beijing 100071, PR China Article History: Received 21 February 2013; Accepted 15 March 2013
    Keywords: Polysaccharides ; Nanoparticles ; Tumors ; Rna ; Luciferase
    ISSN: 0142-9612
    Source: Cengage Learning, Inc.
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