TiO2 Nanopowder Co-Doped with Iodine and Boron to Enhance Visible-Light Photocatalytic Activity
作者：
Ding, Jianqiang;Yuan, Yali* ;Xu, Jinsheng;Deng, Jian;Guo, Jianbo
期刊：
JOURNAL OF BIOMEDICAL NANOTECHNOLOGY ,2009年5(5):521-527 ISSN：1550-7033
通讯作者：
Yuan, Yali
作者机构：
[Ding, Jianqiang; Guo, Jianbo] Univ S China, Sch Publ Hlth, Hengyang 421001, Peoples R China.;[Yuan, Yali; Deng, Jian] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Xu, Jinsheng] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构：
[Yuan, Yali] U;Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
关键词：
Boron;Iodine;Methyl orange;Photocatalytic activity;TiO 2;Visible-light
摘要：
An iodine and boron co-doped TiO<inf>2</inf> photocatalyst was prepared by the hydrolyzation-precipitation method. X-ray diffraction (XRD), ultraviolet-visible diffuse reflectance spectroscopy (UV-Vis DRS), and X-ray photoelectron spectroscopy (XPS) were applied to characterize the crystalline structure, light absorbing ability, and the chemical state of iodine and boron in the photocatalysts. The results of photocatalytic degradation of methyl orange demonstrated that the I-B-TiO<inf>2</inf> catalyst prepared at 400 °C for 3 h exhibited the highest photocatalytic activity with a methyl orange degradation ratio of 61% under visible-light (λ&le 420 nm) irradiation for 120 min. The characterization results revealed that I-B-TiO<inf>2</inf> is in conformity with the anatase TiO<inf>2</inf> and that the doping of iodine and boron ions could efficiently inhibit the grain growth. Doped iodine was present in the multivalent forms of I<sup>7+</sup>, I<sup>-</sup> and I<sup>5+</sup>. Doped boron was present as B<sup>3+</sup> in an as-prepared sample, forming a possible chemical environment such as B-O-Ti. Overall, the doping of I and B enhanced the ability of TiO<inf>2</inf> to absorb visible-light, and it was observed that the photocatalytic activity of I-B-TiO<inf>2</inf> was enhanced by the synergistic effect of I and B. Copyright ©2009 American Scientific Publishers All rights reserved.
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英文
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Determination of trace elements in high purity gold by high resolution inductively coupled plasma mass spectrometry
作者：
Xie Hualin* ;Huang Kelong;Nie Xidu;Fu Liang
期刊：
武汉理工大学学报(材料科学版)(英文版) ,2009年24(4):608-612 ISSN：1000-2413
通讯作者：
Xie Hualin
作者机构：
[Xie Hualin; Nie Xidu; Huang Kelong] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.;[Xie Hualin; Nie Xidu] Hunan Inst Technol, Dept Chem, Hengyang 421008, Peoples R China.;[Fu Liang] Nanhua Univ, Coll Chem & Chem Engn, Hengyang 410001, Peoples R China.
通讯机构：
[Xie Hualin] C;Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.
关键词：
high purity gold;trace elements;high resolution inductively coupled plasma mass spectrometry;spectral interferences
摘要：
Trace elements were determined in high purity gold by high resolution inductively coupled plasma mass spectrometry (HR-ICP-MS). Sample were decomposed by aqua regia. To overcome some potentially problematic spectral interference, measurements were acquired in both medium and high resolution modes. The matrix effects due to the presence of excessive HCl and Au were evaluated. The optimum conditions for the determination was tested and discussed. The standard addition method was employed for quantitative analysis. The detection limits range from 0.01μg/g to 0.28μg/g depending on the elements. The method is accurate, quick and convenient. It has been applied to the determination of trace elements in high purity gold with satisfactory results. ©2009 Wuhan University of Technology and Springer-Verlag GmbH.
语种：
英文
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Folding behaviors of apocytochrome b5 and its mutants: Insights from high temperature molecular dynamics simulations
作者：
Lin, Ying-Wu* ;Nie, Chang-Ming;Liao, Li-Fu
期刊：
Computational and Theoretical Chemistry ,2009年910(1-3):154-162 ISSN：2210-271X
通讯作者：
Lin, Ying-Wu
作者机构：
[Lin, Ying-Wu] Univ Illinois, Dept Chem, Urbana, IL 61801 USA.;[Liao, Li-Fu; Nie, Chang-Ming; Lin, Ying-Wu] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Lin, Ying-Wu] Univ Illinois, Dept Chem, 600 S Mathews Ave, Urbana, IL 61801 USA.
通讯机构：
[Lin, Ying-Wu] U;Univ Illinois, Dept Chem, 600 S Mathews Ave, Urbana, IL 61801 USA.
关键词：
Apocytochrome b(5);Molecular dynamics simulation;High temperature;Unfolding;Heme
摘要：
Apocytochrome b(5) (apocyt b(5)) with heme removal from the heme-binding core 1, and its mutants with amino acid replaced in the hydrophobic core 2, namely apocyt b(5) Y7P, P81A and H15R/S20E, have been subjected to molecular dynamics (MD) simulation at high temperature (500 K) for elucidating their folding behaviors. The early events upon thermal induced unfolding were found to be in good agreement with available experimental results, and the lowest stability of Y7P was predicted among the four apoproteins. The influences of these key residues on protein folding behavior were compared directly at an atomic level. At the same time, the influences of non-native interactions of hydrogen bonds and salt-bridges on protein stabilities were analyzed in detail. The insights from current MD simulations are valuable for understanding the apoprotein folding and the holoprotein formation in terms of heme proteins. Crown Copyright (C) 2009 Published by Elsevier B.V. All rights reserved.
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英文
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Determination of trace elements in residual oil by high-resolution inductively coupled plasma mass spectrometry
作者：
Xie, Hualin* ;Huang, Kelong;Liu, Jinchun;Nie, Xidu;Fu, Liang
期刊：
Analytical and Bioanalytical Chemistry ,2009年393(8):2075-2080 ISSN：1618-2642
通讯作者：
Xie, Hualin
作者机构：
[Huang, Kelong; Xie, Hualin] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.;[Xie, Hualin; Liu, Jinchun; Nie, Xidu] Hunan Inst Technol, Dept Chem, Hengyang 421008, Peoples R China.;[Fu, Liang] Nanhua Univ, Coll Chem & Chem Engn, Hengyang 410001, Peoples R China.
通讯机构：
[Xie, Hualin] C;Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.
会议名称：
15th Biennial Conference on Applied Surface Analysis
会议时间：
SEP 08-10, 2008
会议地点：
Soest, GERMANY
会议主办单位：
[Xie, Hualin;Huang, Kelong] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Peoples R China.^[Xie, Hualin;Liu, Jinchun;Nie, Xidu] Hunan Inst Technol, Dept Chem, Hengyang 421008, Peoples R China.^[Fu, Liang] Nanhua Univ, Coll Chem & Chem Engn, Hengyang 410001, Peoples R China.
关键词：
Residual oil;HR-ICP-MS;Trace elements;Spectral interferences;Matrix effect
摘要：
An analytical method using high-resolution inductively coupled plasma mass spectrometry (HR-ICP-MS) for rapid simultaneous determination of 20 elements, including Na, Mg, Al, Ca, Ti, V, Mn, Fe, Co, Ni, Cu, Zn, Ga, As, Mo, Cd, Sn, Sb, Ba, and Pb elements, in residual oil was described. The sample was dissolved in HNO3 by microwave digestion, and then the above 20 elements in the solution were analyzed directly by HR-ICP-MS. Most of the spectral interferences could be avoided by measuring in the high-resolution mode. The matrix effect caused by the sample-digesting solution and corrected by Sc, Rh, and Bi as the internal standard elements was studied in detail. The optimum condition of the determination was also tested and discussed. The result showed that the detection limits of the method were in the range of 0.014 to 11.6 μg L -1; the relative standard deviation was less than 3.8% and recoveries in the samples were in the range of 88.4% to 108.0%. This method can be used to determine the trace elements in residual oil with the features of accurate, rapid, and convenient determination. © 2009 Springer-Verlag.
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英文
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Synthesis, Crystal Structure and Thermal Stability Properties of the Supramolecular Complex [Co(phen)_3] [(C_6H_5)_2C(OH)COO]_2·7H_2O
作者：
Xu Jin-Sheng* ;Yuan Ya-Li
期刊：
Chinese Journal of Structural Chemistry ,2009年28(10):1325-1328 ISSN：0254-5861
通讯作者：
Xu Jin-Sheng
作者机构：
[Xu Jin-Sheng] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Yuan Ya-Li] Nanhua Univ, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Xu Jin-Sheng] H;Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
Cobalt(II) complex;Crystal structure;Thermal stability properties
摘要：
One new cobalt complex [Co(phen)(3)][(C6H5)(2)C(OH)COO](2)center dot 7H(2)O with benzeneacetic acid (BAA), 1,10-phenanthroline and cobaltous perchlorate has been synthesized by means of solvent method. It crystallizes in the triclinic system, space group P (1) over bar, with a = 1.14181(13), b = 1.64417(18), c = 1.65342(18) nm, alpha = 74.2830(10), beta = 84.4490(10), gamma = 74.9430(10)degrees, V = 2.8842(6) nm(3), D-c = 1.359 g/cm(3), Z = 2, F(000) = 1234, R = 0.0621 and wR = 0.1673. The crystal structure shows that the cobalt ion is coordinated with six nitrogen atoms from three 1,10-phenanthroline molecules, giving a distorted octahedral coordination geometry. There are a lot of hydrogen bonds in the complex, from which a two-dimensional network is constructed. The result of TG analysis shows that the title complex is stable below 130.0 degrees C.
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英文
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Preparation and characterization of N-I co-doped nanocrystal anatase TiO2 with enhanced photocatalytic activity under visible-light irradiation
作者：
[Anonymous]
期刊：
Materials Chemistry and Physics ,2009年117(2-3):522-527 ISSN：0254-0584
通讯作者：
Deng, J.(dengjfp@163.com)
作者机构：
[Zhou, Liang] School of Public Health, University of South China, Hengyang, Hunan 421001, China;[Liu, Wanbing] Central of quality technology supervision inspection test of Henan Pingdingshan, Pingdingshan, Henan 467000, China;[An, Lin; Zhao, Yubao; Deng, Jian; Chen, Fei] School of Chemistry and Chemical Engineering, University of South China, Hengyang, Hunan 421001, China
通讯机构：
School of Chemistry and Chemical Engineering, University of South China, China
关键词：
TiO2;Co-doping;Nitrogen;Iodine;Hydrolysis method;Visible-light;Photocatalytic activity
摘要：
N-I co-doped TiO<inf>2</inf> nanoparticles were prepared by hydrolysis method, using ammonia and iodic acid as the doping sources and Ti(OBu)<inf>4</inf> as the titanium source. The prepared catalysts were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), Fourier transform infrared spectroscopy (FTIR) and ultraviolet-visible diffuse reflection spectroscopy (UV-vis DRS). XRD spectra show that N-I-TiO<inf>2</inf> samples calcined at 673 K for 3 h are of anatase structure. XPS analysis of N-I-TiO<inf>2</inf>samples indicates that some N atoms replace O atoms in TiO<inf>2</inf> lattice, and I exist in I<sup>7+</sup>, I<sup>-</sup> and I<sup>5+</sup> chemical states in the samples. UV-vis DRS results reveal that N-I-TiO<inf>2</inf> had significant optical absorption in the region of 400-600 nm. The photocatalytic activity of catalysts was evaluated by monitoring the photocatalytic degradation of methyl orange (MO). Compared with P25 and mono-doped TiO<inf>2</inf>, N-I-TiO<inf>2</inf> powder shows higher photocatalytic activity under both visible-light (λ>420 nm) and UV-vis light irradiation. Furthermore, N-I-TiO<inf>2</inf> also displays higher COD removal rate under UV-vis light irradiation. ©2009 Elsevier B.V. All rights reserved.
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英文
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Early events in thermal unfolding of apocytochrome b562 and its double-cysteine mutant as revealed by molecular dynamics simulation
作者：
Lin, Ying-Wu* ;Ni, Feng-Yun;Ying, Tian-Lei
期刊：
Computational and Theoretical Chemistry ,2009年898(1-3):82-89 ISSN：2210-271X
通讯作者：
Lin, Ying-Wu
作者机构：
[Lin, Ying-Wu] Univ S China, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Ni, Feng-Yun; Ying, Tian-Lei] Fudan Univ, Biol Chem Lab, Dept Chem, Shanghai 200433, Peoples R China.;[Lin, Ying-Wu] Univ S China, Coll Chem & Chem Engn, ChangSheng Rd, Hengyang 421001, Peoples R China.
通讯机构：
[Lin, Ying-Wu] U;Univ S China, Coll Chem & Chem Engn, ChangSheng Rd, Hengyang 421001, Peoples R China.
关键词：
Apocytochrome b(562);MD simulation;Thermal unfolding;Heme-binding motif
摘要：
Apocytochrome b(562) (apocyt b(562)) with heme group removal and its double-cysteine mutant, dc-apocyt b(562) (Arg98Cys/Tyr101Cys) containing a CXXCH heme-binding motif of cytochrome c, have been subjected to molecular dynamics (MID) simulation at high temperature (500 K). The early events upon thermal unfolding were found to be different between these two apoproteins as obtained from mutation studies. At the same time, the contribution of non-native interactions, such as hydrogen bonds and salt bridges, to protein stabilities were also analyzed in detail. The information provided by MID simulations is valuable for understanding the in vivo formation of b-type as well as c-type heme proteins. (C) 2008 Elsevier B.V. All rights reserved.
语种：
英文
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Synchronous fluorescence determination of urinary 1-hydroxypyrene, β-naphthol and 9-hydroxyphenanthrene based on the sensitizing effect of β-cyclodextrin
作者：
Yang, Hong-Mei;Wang, Yong-Sheng* ;Li, Jun-Hong;Li, Gui-Rong;Wang, Ying;...
期刊：
Analytica Chimica Acta ,2009年636(1):51-57 ISSN：0003-2670
通讯作者：
Wang, Yong-Sheng
作者机构：
[Li, Jun-Hong; Kang, Rong-Hui; Wang, Ying; Tan, Xuan; Li, Gui-Rong; Yang, Hong-Mei; Xue, Jin-Hua; Wang, Yong-Sheng] Univ S China, Coll Publ Hlth, Hengyang 421001, Peoples R China.;[Mao, Xi-Lin] Univ S China, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Wang, Yong-Sheng] U;Univ S China, Coll Publ Hlth, Hengyang 421001, Peoples R China.
关键词：
Synchronous fluorescence;1-Hydroxypyrene;beta-Naphthol;9-Hydroxyphenanthrene;beta-Cyclodextrin;Urine
摘要：
A novel method for the simultaneous determination of 1-hydroxypyrene (1-OHP), β-naphthol (β-NAP) and 9-hydroxyphenanthrene (9-OHPe) in human urine has been established by using synchronous fluorescence spectrometry. It was based on the fact that synchronous fluorescence spectrometry can resolve the broad-band overlapping of conventional fluorescence spectra, which arise from their similar molecular structures. Only one single scan is needed for quantitative determination of three compounds simultaneously when Δλ = 15 nm is chosen. The signals detected at these three wavelengths, 369.6, 330.0 and 358.0 nm, vary linearly when the concentration of 1-OHP, β-NAP and 9-OHPe is in the range of 2.16 × 10-8-1.50 × 10-5 mol L-1, 1.20 × 10-7-1.10 × 10-5 mol L-1 and 1.07 × 10-7-3.50 × 10-5 mol L-1, respectively. The correlation coefficients for the standard calibration graphs were 0.994, 0.999 and 0.997 (n = 7) for 1-OHP, β-NAP and 9-OHPe, respectively. The limits of detection (LOD) for 1-OHP, β-NAP and 9-OHPe were 6.47 × 10-9 mol L-1, 3.60 × 10-8 mol L-1 and 3.02 × 10-8 mol L-1with relative standard deviations (R.S.D.) of 4.70-6.40%, 2.80-4.20%, 3.10-4.90% (n = 6), respectively. The method described here had been applied to determine traces of 1-OHP, β-NAP and 9-OHPe in human urine, and the obtained results were in good agreement with those obtained by the HPLC method. In addition, the interaction modes between β-cyclodextrin (β-CD) and 1-OHP, β-NAP or 9-OHPe, as well as the mechanism of the fluorescence enhancement were also discussed. © 2009 Elsevier B.V. All rights reserved.
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英文
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Analysis of malachite green and crystal violet in fish with bilinear model
作者：
Yuan, Jin-Tao;Liao, Li-Fu* ;Xiao, Xi-Lin;He, Bo;Gao, Shu-Qin
期刊：
Food Chemistry ,2009年113(4):1377-1383 ISSN：0308-8146
通讯作者：
Liao, Li-Fu
作者机构：
[Gao, Shu-Qin; Liao, Li-Fu; Xiao, Xi-Lin; Yuan, Jin-Tao; He, Bo] Univ S China, Coll Chem & Chem Engn, Coll Publ Hlth, Hengyang 421001, Hunan, Peoples R China.;[Xiao, Xi-Lin] Hunan Univ, State Key Lab Chemobiosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Liao, Li-Fu] U;Univ S China, Coll Chem & Chem Engn, Coll Publ Hlth, Hengyang 421001, Hunan, Peoples R China.
关键词：
Bilinear model;Crystal violet;Fish;Malachite green;Thiocyanate;Visible absorption spectra;Water-ethanol mixed solvent
摘要：
A new method for the simultaneous analysis of malachite green (MG) and crystal violet (CV) in fish samples has been developed. In the presence of thiocyanate, the second order data of MG or CV obtained from the spectra of MG or CV in a series of water-ethanol mixed solvents with various ethanol volume fractions could be expressed as the combination of two bilinear data matrices. With the bilinear model, the second order spectra data of mixtures containing MG and CV those coexist with interferents could be analysed using the second order calibration algorithms, and the simultaneous determination of MG and CV in fish samples could be achieved. The algorithms were based on residual bilinearisation (RBL) and unfolded partial least-squares/residual bilinearisation (U-PLS/RBL) respectively. The method has been successfully used to determine simultaneously MG and CV in some fish samples with satisfactory results. © 2008 Elsevier Ltd. All rights reserved.
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英文
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Resonance light scattering method for the determination of anionic surfactant with acridine orange
作者：
Xiao, Xilin;Wang, Yongsheng* ;Chen, Zhangming;Li, Qiangxiang;Liu, Zhihuo;...
期刊：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY ,2008年71(2):398-402 ISSN：1386-1425
通讯作者：
Wang, Yongsheng
作者机构：
[Lue, Changyin; Li, Yanzhi; Wang, Yongsheng; Xiao, Xilin; Li, Guirong; Xue, Jinhua] Univ S China, Coll Publ Hlth, Henyang 421001, Peoples R China.;[Xiao, Xilin] Univ S China, Coll Chem & Chem Engn, Henyang 421001, Peoples R China.;[Chen, Zhangming] Changsha Med Coll, Changsha 410219, Hunan, Peoples R China.;[Liu, Zhihuo; Li, Qiangxiang] Cent S Univ, Xiangya Hosp, Changsha 410219, Hunan, Peoples R China.
通讯机构：
[Wang, Yongsheng] U;Univ S China, Coll Publ Hlth, Henyang 421001, Peoples R China.
关键词：
Anionic surfactant;Acridine orange;Resonance Rayleigh scattering;Resonance nonlinear scattering
摘要：
The resonance Rayleigh scattering (RRS), second-order scattering (SOS) and frequency-double scattering (FDS) spectra of sodium dodecylbenzene sulfonate (SDBS) (anionic surfactant (AS)) with acridine orange (AO) system were studied. Experimental results showed that when λ<inf>em</inf> = λ<inf>ex</inf> = 537 nm, the RRS peak of AO was greatly enhanced with the increase of SDBS concentration at a pH range of 1.8-4.0. The linear range of the calibration curve for SDBS was 0.028-8.71 mg L<sup>-1</sup> with a detection limit of 8.36 μg L<sup>-1</sup> when the AO concentration was 2.5 ×10<sup>-5</sup>mol L<sup>-1</sup>. The method has been applied to the determination of trace amount of AS in environmental water samples with satisfactory results. In addition, when λ<inf>em</inf> = 321 nm and λ<inf>ex</inf> = 642 nm, the intensity of FDS was proportional to the SDBS concentration ranging from 0.014 to 8.71 mg L<sup>-1</sup> and the correlation coefficient was 0.993 with a detection limit of 4.31 μg L<sup>-1</sup>;when λ<inf>em</inf> = 642 nm and λ<inf>ex</inf> = 321 nm, the intensity of SOS was proportional to the SDBS concentration ranging from 0.050 to 8.71 mg L<sup>-1</sup>, and the correlation coefficient was 0.993 with a detection limit of 14.9 μg L<sup>-1</sup>. ©2008 Elsevier B.V. All rights reserved.
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英文
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Forced unfolding of apocytochrome b(5) by steered molecular dynamics simulation
作者：
Lin, Ying-Wu* ;Wang, Zhong-Hua;Ni, Feng-Yun;Huang, Zhong-Xian
期刊：
PROTEIN JOURNAL ,2008年27(3):197-203 ISSN：1572-3887
通讯作者：
Lin, Ying-Wu
作者机构：
[Lin, Ying-Wu] Univ S China, Coll Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Ni, Feng-Yun; Wang, Zhong-Hua; Lin, Ying-Wu; Huang, Zhong-Xian] Fudan Univ, Dept Chem, Biol Chem Lab, Shanghai 200433, Peoples R China.
通讯机构：
[Lin, Ying-Wu] U;Univ S China, Coll Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
关键词：
apocytochrome b(5);forced unfolding;steered molecular dynamics;intermediate;heme-binding
摘要：
Apocytochrome b 5 (apocyt b 5), a small b-type cytochrome with heme prosthetic group removal, has been subjected to steered molecular dynamics (SMD) simulations for investigating the consequences of mechanical force-induced unfolding. Both constant velocity (0.5 and 1.0 Å/ps) and constant force (500, 750 and 1000 pN) stretching have been employed to model forced unfolding of apocyt b 5. The results of SMD simulations elucidate that apocyt b 5 is protected against external stress mainly through the interstrand hydrogen bonding between its β1–β2 and β2–β3 strands, highlighting the importance of hydrophobic core 2 in stabilization of apocyt b 5. The existence of intermediate states manifested by current simulations in the forced unfolding pathway of apocyt b 5 is different from the observations in pervious thermal or chemical unfolding studies in the absence of force. The present study could thus provide insights into the relationship between the two cooperative functional modules of apocyt b 5 and also guide the rational molecular design of heme proteins.
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英文
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An investigation into the surface phase of nanostructured zirconia by conventional UV spectroscopy
作者：
Zhao, Yubao;Fu, Shifu;Li, Hui;Tian, Xiaoning;Nie, Changming
期刊：
Materials Letters ,2008年62(15):2207-2210 ISSN：0167-577X
通讯作者：
Zhao, YB
作者机构：
[Zhao, Yubao; Fu, Shifu; Li, Hui; Tian, Xiaoning; Nie, Changming] Nanhua Univ, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Zhao, YB ] ;Nanhua Univ, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.
关键词：
zirconia;phase transformation;UV spectroscopy;X-ray diffraction
摘要：
The phase features of nanostructured zirconia samples were characterized by conventional UV spectroscopy and XRD. While XRD identification shows the phase in the bulk of zirconia prepared by refluxing a ZrOCl<inf>2</inf> solution and calcining at 673 K is pure monoclinic, a good few tetragonal ZrO<inf>2</inf> in its surface regions was detected by surface-sensitive UV spectroscopy. Although about 50% of the zirconia from 353 K aging and calcining at 673 K exists as monoclinic in bulk, the surface structure is pure tetragonal. Results show that the thermodynamically feasible tetragonal phase always stays on the surface and the phase transition from tetragonal to monoclinic takes place initially at the core. ©2007 Elsevier B.V. All rights reserved.
语种：
英文
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ISOLATION, STRUCTURE ELUCIDATION, AND MUTAGENICITY OF FOUR ALTERNARIOL DERIVATIVES PRODUCED BY THE MANGROVE ENDOPHYTIC FUNGUS No. 2240
作者：
Tan, Ni* ;Tao, Yiwen;Pan, Jiahui;Wang, Sanyong;Xu, Fang;...
期刊：
Chemistry of Natural Compounds ,2008年44(3):296-300 ISSN：0009-3130
通讯作者：
Tan, Ni
作者机构：
[Pan, Jiahui; Tan, Ni; Tao, Yiwen; Wang, Sanyong; Xu, Fang; Lin, Yongcheng; She, Zhigang] Sun Yat Sen Zhongshan Univ, Sch Chem & Chem Engn, Guangzhou 510275, Guangdong, Peoples R China.;[Tan, Ni] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Jones, E. B. Gareth] City Univ Hong Kong, Dept Biol & Chem, Hong Kong 999077, Hong Kong, Peoples R China.
通讯机构：
[Tan, Ni] S;Sun Yat Sen Zhongshan Univ, Sch Chem & Chem Engn, Guangzhou 510275, Guangdong, Peoples R China.
关键词：
alternariol derivatives;mangrove endophytic fungus;alternariol 4-methyl-10-acethyl ester;mutagenicity;KB tumor lines;KBv200;SOUTH CHINA SEA;XYLARIA SP;MONOMETHYL ETHER;COAST;METABOLITES;NUMBER-2508
摘要：
A new alternariol derivative, 2240B (1), together with alternariol (2), alternariol 4,10-dimethyl ether (3), and alternariol 4-methyl ether (4), was isolated from the ethyl acetate extract of the liquid medium GYT of No. 2240, the mangrove endophytic fungus from the South China Sea Coast. The structure of compound 1 was unambiguously elucidated as alternariol 4-methyl-10-acethyl ester by spectra including one/two-dimensional NMR, HREIMS, IR, and UV. The structures of compounds 2-4 were also established by spectroscopic analyses and comparison with related literature data. The anticancer tests showed that compounds 2 and 4 had strong activities against KB and KBv200 cells with IC50 values of 3.17, 3.12, and 4.82, 4.94 mu g/mL, while compounds 1 and 3 exhibited weak activities against the two kinds of tumor lines with IC50 values of more than 50 mu g/mL.
语种：
英文
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Study on QSSR with the atomic ionicity indices
作者：
Wu, Yaxin* ;Nie, Changming;Wu, Rongyan;Jiang, Saihong;Wen, Songnian
期刊：
Journal of the Chilean Chemical Society ,2008年53(3):1588-1593 ISSN：0717-9707
通讯作者：
Wu, Yaxin
作者机构：
[Wen, Songnian; Nie, Changming; Jiang, Saihong; Wu, Yaxin] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Wu, Rongyan] Univ S China, Sch Nucl Sci & Technol, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Wu, Yaxin] U;Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
关键词：
Ionicity index;Stretching vibration frequency;Ultraviolet absorption spectrum;X=O bond
摘要：
In this paper, we find that stretching vibration frequencies of the X=O for series of R1R2C=O, (RO)(2)CO, RCO2H, a-halogenated aldehydes, cross-RONO and R2NNO can be described by the ionicity indices of X and O atoms as follows: v = aINI((O))+bINI((X))+c, where a, b, c are regression constants, and INI(X), INI(O) represent the ionicity indices of X and O atoms. The efficiency of the model is verified by high correlation coefficients in the range of 0.960-1.000. Similarly, the ultraviolet absorption energy of ketones can also be characterized by the ionicity indices of C and O as Delta E = aINI((O)) +bINI((C))+c. The predicted results are in good agreement with the experimental ones. Furthermore, the good stability and powerful predictive ability of those models are proved by LOO method.
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Two microporous metal-organic frameworks with different topologies constructed from linear trinuclear M3(COO)n secondary building units
作者：
Wang, Xiao-Feng;Zhang, Yue-Biao;Cheng, Xiao-Ning;Chen, Xiao-Ming*
期刊：
CrystEngComm ,2008年10(6):753-758 ISSN：1466-8033
通讯作者：
Chen, Xiao-Ming
作者机构：
[Chen, Xiao-Ming; Zhang, Yue-Biao; Wang, Xiao-Feng; Cheng, Xiao-Ning] Sun Yat Sen Univ, Sch Chem & Chem Engn, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.;[Wang, Xiao-Feng] Nanhua Univ, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Chen, Xiao-Ming] S;Sun Yat Sen Univ, Sch Chem & Chem Engn, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.
摘要：
Two new microporous metal-organic frameworks, [Zn3(NH 2BDC)3(H2O)2]·5DMF (1) and (Me2NH2)2[Cd3(NH2BDC) 4]·2DMF·2.5 H2O (2) (NH2BDC = 2-amino-1,4-benzenedicarboxylate), based on linear trinuclear secondary building units of Zn3(COO)6 or Cd3(COO)8 that have different connected numbers, have been synthesized and characterized, which exhibit usual pcu and rare hex-like topologies, respectively. Both 1 and 2 are three-dimensional porous frameworks, having solvent accessible volumes of ca. 53 and 39%, respectively. There are unremovable guest Me2NH 2+ cations clogged in the channels of 2. In contrast, being of good thermo-stability, 1 has a Langmuir surface area about 570 m 2 g-1 and type I isotherm behaviour for nitrogen gas sorption at 77 K, being typical of microporous material. © The Royal Society of Chemistry 2008.
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英文
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In-situ monitoring of breast cancer cell (MCF-7) growth and quantification of the cytotoxicity of anticancer drugs fluorouracil and cisplatin
作者：
Xiao, Xilin;Guo, Manli* ;Li, Qiangxiang;Cai, Qingyun;Yao, Shouzhuo;...
期刊：
Biosensors and Bioelectronics ,2008年24(2):247-252 ISSN：0956-5663
通讯作者：
Guo, Manli
作者机构：
[Cai, Qingyun; Xiao, Xilin; Guo, Manli; Yao, Shouzhuo] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemobiosensing & Chemomet, Changsha 410082, Hunan, Peoples R China.;[Xiao, Xilin] Univ S China, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Li, Qiangxiang] Cent S Univ, Xiangya Hosp, Changsha 410008, Hunan, Peoples R China.;[Grimes, Craig A.] Penn State Univ, Dept Elect Engn, University Pk, PA 16802 USA.;[Grimes, Craig A.] Penn State Univ, Dept Mat Sci & Engn, University Pk, PA 16802 USA.
通讯机构：
[Guo, Manli] H;Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemobiosensing & Chemomet, Changsha 410082, Hunan, Peoples R China.
关键词：
Cytotoxicity;Human breast cancer cells (MCF-7);Magnetoelastic sensor;Wireless
摘要：
A wireless sensing device was developed for the in-situ monitoring of the growth of human breast cancer cells (MCF-7) and evaluation of the cytotoxicity of the anticancer drugs fluorouracil and cisplatin. The sensor is fabricated by coating a magnetoelastic ribbon-like sensor with a layer of polyurethane that protects the iron-rich sensor from oxidation and provides a cell-compatible surface. In response to a time-varying magnetic field, the magnetoelastic sensor longitudinally vibrates, emitting magnetic flux that can be remotely detected by a pick-up coil. No physical connections between the sensor and the detection system are required. The wireless property facilitates aseptic biological operation, especially in cell culture as illustrated in this work. The adhesion of cells on the sensor surface results in a decrease in the resonance amplitude, which is proportional to the cell concentration. A linear response was obtained in cell concentrations of 5 × 104 to 1 × 106 cells ml-1, with a detection limit of 1.2 × 104 cells ml-1. The adhesion strength of cells on the sensor is qualitatively evaluated by increasing the amplitude of the magnetic excitation field. And the cytotoxicity of the anticancer drugs fluorouracil and cisplatin is evaluated by the magnetoelastic biosensor. The cytostatic curve is related with the quantity of cytostatic drug. The lethal concentration (LC50) for cells incubated in the presence of drugs for 20 h is calculated to be 19.9 μM for fluorouracil and 13.1 μM for cisplatin. © 2008 Elsevier B.V. All rights reserved.
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英文
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A copper coordination compound produced by a marine fungus Fusarium sp. ZZF51 with biosorption of Cu(II) ions
作者：
Tan Ni* ;Pan Jia-Hui;Peng Guang-Tian;Mou Cheng-Bo;Tao Yi-Wen;...
期刊：
中国化学 ,2008年26(3):516-521 ISSN：1001-604X
通讯作者：
Tan Ni
作者机构：
[Pan Jia-Hui; She Zhi-Gang; Lin Yong-Cheng; Tan Ni; Mou Cheng-Bo; Tao Yi-Wen; Peng Guang-Tian] Zhongshan Univ, Sch Chem & Chem Engn, Guangzhou 510275, Peoples R China.;[Tan Ni] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Zhou Shi-Ning; Yang Ze-Liang] Zhongshan Univ, Sch Life Sci, State Key Lab Biocontrol, Guangzhou 510275, Peoples R China.
通讯机构：
[Tan Ni] Z;Zhongshan Univ, Sch Chem & Chem Engn, Guangzhou 510275, Peoples R China.
关键词：
Biosorption;bis(5-butyl-2-pyridinecarboxylato-N1,O2)- copper;Complex constant;Copper coordination compound;Endurance;Mutagenicity
摘要：
A copper coordination compound ZZF51(A) named bis(5-butyl-2- pyridinecarboxylato-N1,O2)-copper, the first time found in the nature, was isolated from a marine endophytic fungus Fusarium sp. ZZF51 from the South China Sea coast. Its structure was elucidated using spectroscopic methods and single crystal X-ray diffraction analysis. The antimicrobial cytotoxicity experiments exhibited that ZZF51(A) had mutagenicity activities against four aerobic reference strains Staphylococcus aureus, Bacillus subtilis, Escherichia coli, and Salmonella enteritidis with respective MIC values of 12.5, 25, 12.5, and 50 μg/mL. The anti-cancer tests showed that the compound had strong inhibitory activities against three human cancer lines KB, KBv200, and HepG2 with IC 50 values of 3.54, 3.68 and 25.12 μg/mL respectively. In the course of investigating the source of ZZF51(A) in biomass, it was found that the output of ZZF51(A) was largely influenced by the amount of CuCl2 in the liquid medium, and the fungus (No, ZZF51) had two notable characteristics: endurance of high concentration Cu(II) ions and biosorption of Cu(II) ions. © 2008 SIOC, CAS, & Wiley-VCH Verlag GmbH & Co. KGaA.
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英文
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Synthesis and antifungal activities of novel 5-amino-6-arylamino1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one derivatives
作者：
Wang, Hong-Qing* ;Zhou, Wei-Pimg;Wang, Yu-Yuan;Lin, Can-Rong
期刊：
JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY ,2008年56(16):7321-7325 ISSN：0021-8561
通讯作者：
Wang, Hong-Qing
作者机构：
[Wang, Yu-Yuan; Wang, Hong-Qing; Lin, Can-Rong] Univ S China, Coll Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Zhou, Wei-Pimg] Univ S China, Coll Math & Phys, Hengyang 421001, Hunan, Peoples R China.;[Wang, Hong-Qing] Univ S China, Coll Chem & Chem Engn, 28 Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Wang, Hong-Qing] U;Univ S China, Coll Chem & Chem Engn, 28 Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
关键词：
1H-Pyrazolo[3,4-d]pyrimidin-4(5H)-one;aza-Wittig reaction;synthesis;1,8-2H-pyrazolo[3,4-d][1,2,4]triazolo[1,5-a]pyrimidin-4-one;antifungal
摘要：
A novel approach was developed to regioselectively synthesize new 5-amino-6-arylamino-1H-pyrazolo[3,4-d]pyrimidin-4(5H)-one 5 derivatives via a tandem aza-Wittig and annulation reactions of iminophosphorane 2, aromatic isocyanates, and hydrazine in 52-92% isolated yields. The compounds 5 reacted with triethyl orthoformate to give 1,8-2H-pyrazolo[3,4-d][1,2,4]triazolo[1,5-a] pyrimidin-4-ones 6 in good yields (62-94%). Their structures were clearly confirmed by spectroscopy data (IR, 1H NMR, MS), elemental analysis, or X-ray diffraction crystallography. The results of preliminary bioassay indicated that the compounds 5 and 6 possessed high antifungal activity against Botrytis cinerea Pers and Sclerotinia sclerotiorum. Compounds 5 showed much better antifungal activities when R was Me instead of PhCH2. Especially, compounds 6c, 6g, and 6i inhibited Sclerotinia by 100% at the concentration of 50 mg/L and by 83, 83, and 82% at the dosage of 10 mg/L, respectively. © 2008 American Chemical Society.
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英文
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Determination of Sudan I in chilli powder from solvent components gradual change–visible spectra data using second order calibration algorithms
作者：
Yuan, Jintao;Liao, Lifu* ;Lin, Yingwu;Deng, Changai;He, Bo
期刊：
Analytica Chimica Acta ,2008年607(2):160-167 ISSN：0003-2670
通讯作者：
Liao, Lifu
作者机构：
[Yuan, Jintao; Liao, Lifu; Lin, Yingwu; Deng, Changai] Univ S China, Coll Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Yuan, Jintao; He, Bo] Univ S China, Coll Publ Hlth, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Liao, Lifu] U;Univ S China, Coll Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
关键词：
Parallel factor analysis;Rank annihilation factor analysis;Second order calibration;Solvent components gradual change;Sudan I;Visible absorption spectra
摘要：
It was discovered that a second order spectra data matrix of Sudan I produced from the solvent components gradual change-visible absorption spectra can be expressed as the combination of two bilinear data matrices. Based on this discovery, a new method for the determination of Sudan I in gray systems using second order calibration algorithms has been developed. The second order calibration algorithms were based on the popular parallel factor analysis (PARAFAC) and rank annihilation factor analysis (RAFA), respectively. In the method described here, the components of the solvent were changed gradually by adding ethanol into cyclohexane, the absorption spectra of Sudan I and chilli samples in a series of cyclohexane-ethanol mixed solvents with various ethanol volume fractions were recorded, and then the second order data were obtained from the solvent components gradual change-visible absorption spectra. Thus, the concentration of Sudan I in a gray system could be determined from the spectra matrices using second order calibration algorithms. This method is simple, convenient and dependable. The method has been used to determine Sudan I in chilli powder with satisfactory results. © 2007 Elsevier B.V. All rights reserved.
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英文
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Microwave-assisted solvothermal synthesis of a dynamic porous metal-carboxylate framework
作者：
Wang, Xiao-Feng;Zhang, Yue-Biao;Huang, Hong;Zhang, Jie-Peng* ;Chen, Xiao-Ming
期刊：
Crystal Growth & Design ,2008年8(12):4559-4563 ISSN：1528-7483
通讯作者：
Zhang, Jie-Peng
作者机构：
[Chen, Xiao-Ming; Zhang, Jie-Peng; Zhang, Yue-Biao; Wang, Xiao-Feng] Sun Yat Sen Univ, Sch Chem & Chem Engn, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.;[Wang, Xiao-Feng] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Huang, Hong] Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China.
通讯机构：
[Zhang, Jie-Peng] S;Sun Yat Sen Univ, Sch Chem & Chem Engn, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.
会议名称：
12th International Conference on Crystalization of Biological Macromolecules
会议时间：
MAY 06-08, 2008
会议地点：
Cancun, MEXICO
会议主办单位：
[Wang, Xiao-Feng;Zhang, Yue-Biao;Zhang, Jie-Peng;Chen, Xiao-Ming] Sun Yat Sen Univ, Sch Chem & Chem Engn, MOE Key Lab Bioinorgan & Synthet Chem, Guangzhou 510275, Guangdong, Peoples R China.^[Wang, Xiao-Feng] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.^[Huang, Hong] Sun Yat Sen Univ, Instrumental Anal & Res Ctr, Guangzhou 510275, Guangdong, Peoples R China.
摘要：
By treating Cu(NO 3 ) 2 ·3H 2 O with a V-shaped ligand 4,4′-oxydibenzoic acid (H 2 oba), a dynamic metal-carboxylate framework [Cu 2 (oba) 2 (DMF) 2 ]· 5.25DMF (MCF-23) was synthesized, which features a wavelike layer with rhombic grids based on the paddle-wheel secondary building units. These layers stack via strong offset π-π stacking of the phenyl groups of oba ligands to give three-dimensional porosity. MCF-23 synthesized by conventional solvothermal methods always contains considerable and intractable impurities. In contrast, a microwave-assisted solvothermal method was proven to be a faster and greener approach to synthesize phase-pure MCF-23 in high yield. More interestingly, larger crystals suitable for single-crystal diffraction could be obtained by the multistep microwave heating mode. A powder X-ray diffraction study of MCF-23 reveals the dynamic structural transformation accompanying the release and reabsorption of the guest molecules. The N 2 (77 K) and CO 2 (195 K) gas sorption isotherms of the guest-free phase MCF-23a were measured. © 2008 American Chemical Society.
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