TiO2 Nanoparticles Co-Doped with Silver and Nitrogen for Antibacterial Application
作者：
Yuan, Yali* ;Ding, Jianqiang;Xu, Jinsheng;Deng, Jian;Guo, Jianbo
期刊：
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY ,2010年10(8):4868-4874 ISSN：1533-4880
通讯作者：
Yuan, Yali
作者机构：
[Yuan, Yali; Deng, Jian] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Ding, Jianqiang] Zhenhai Ctr Dis Control & Prevent, Ningbo 315200, Peoples R China.;[Xu, Jinsheng] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Guo, Jianbo] Univ S China, Sch Publ Hlth, Hengyang 421001, 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：
Antibacterial property;Co-doped;Nanoparticle;TiO 2
摘要：
We have prepared a series of TiO<inf>2</inf> nanoparticles for antibacterial applications. These TiO<inf>2</inf> nanoparticles were prepared by the hydrolysis precipitation method with Ti(OBu)<inf>4</inf>, silver nitrate and ammonia. Crystal structure, particle size, interfacial structure and UV-visible light response of the prepared nanoparticles were characterized by X-ray diffraction measurements (XRD), Transmission electron microscopy (TEM), Fourier-transform infrared spectroscopy (FTIR) and UV-Vis diffuse reflectance spectroscopy (UV-Vis-DRs). The XRD spectra showed that all samples were anatase structure calcined at 450 °C for 3 hours. The Ag doping made the peak of diffraction wider. The results of TEM showed that the nanoparticles of TiO <inf>2</inf>, N-TiO<inf>2</inf> and 1% Ag-N-TiO<inf>2</inf> were all spherical in shape and well distributed with a mean size of 19.8 nm, 39.2 nm and 20.7 nm, respectively. N doping caused the nanoparticle size to increase, while, when the doped amount of Ag<sup>+</sup> increased, the TiO<inf>2</inf> particle size decreased. The FTIR revealed that Ag and N doping of TiO<inf>2</inf> appeared to have strong absorption by -OH group and showed the characteristic absorption band of NH<sup>+</sup><inf>4</inf> and Ag. The UV-Vis-DRs indicated that the absorption band of Ag-N co-doped TiO<inf>2</inf> had red shift and that the optical absorption response (between 400 nm and 700 nm) had obvious enhancement. The antibacterial properties of nanoparticles were investigated by agar diffusion method toward Escherichia coli and Bacillus subtilis. The results indicated that both Ag-and N-doped TiO<inf>2</inf> could increase the antibacterial properties of TiO<inf>2</inf> nanoparticles under fluorescent light irradiation. A 1% Ag-N-TiO<inf>2</inf> had the highest antibacterial activity with a clear antibacterial circle of 33.0 mm toward Escherichia coli and 22.8 mm toward Bacillus subtilis after cultivation for 24 hours. Copyright ©2010 American Scientific Publishers.
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英文
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Selective solid-phase extraction of trace thorium(IV) using surface-grafted Th(IV)-imprinted polymers with pyrazole derivative
作者：
Lin, Canrong;Wang, Hongqing* ;Wang, Yuyuan;Cheng, Zhiqiang
期刊：
Talanta ,2010年81(1-2):30-36 ISSN：0039-9140
通讯作者：
Wang, Hongqing
作者机构：
[Wang, Hongqing; Cheng, Zhiqiang; Lin, Canrong; Wang, Yuyuan] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Wang, Hongqing] Univ S China, Sch Chem & Chem Engn, 28 Changsheng W Rd Hengyang, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Wang, Hongqing] U;Univ S China, Sch Chem & Chem Engn, 28 Changsheng W Rd Hengyang, Hengyang 421001, Hunan, Peoples R China.
关键词：
Ion-imprinted polymers;Solid-phase extraction;Thorium(IV);Pyrazole derivative;Spectrophotometric determination
摘要：
A new pyrazole derivative 1-phenyl-3-methylthio-4-cyano-5-acrylicacidcarbamoyl-pyrazole (PMTCAACP) was synthesized and chosen as a complexing monomer for the preparation of surface-grafted ion-imprinted polymers for selective solid-phase extraction of thorium(IV). The silica gel, modified with maleic anhydride, was prepared as a carrier material. In the ion-imprinting process, Th(IV) was complexed with PMTCAACP, and then imprinted in the polymers grafted to the surface of modified silica gel. Subsequently, the template Th(IV) ions were removed with 6 mol/L HCl solution. The obtained ion-imprinted particles for Th(IV) showed specific recognition, and rapid adsorption and desorption kinetics process. The maximum static and total dynamic adsorption capacity of the ion-imprinted polymers (IIPs) for Th(IV) was 64.8 and 37.4 mg/g, respectively. The relative selectivity coefficient values of the imprinted adsorbent for Th(IV)/U(VI), Th(IV)/Ce(III), Th(IV)/La(III), and Th(IV)/Zr(IV) were 72.9, 89.6, 93.8, and 137.2 times greater than non-imprinted matrix, respectively. The interference effect of common cations tested did not interfere with the recovery of Th(IV). The enhancement factor of 20.2, the detection limit of 0.43 μg/L, and the precision of 2.47% (n = 7) of the method under the optimized conditions were obtained. Additionally, the calibration curve (r = 0.9993) was linear in the range of 1.43-103 μg/L of thorium(IV). The prepared IIPs were shown to be promising for solid-phase extraction coupled with UV-vis spectrophotometry for determination of trace Th(IV) in real samples. ©2009 Elsevier B.V. All rights reserved.
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英文
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Rapid simultaneous analysis of 1-hydroxypyrene, 2-hydroxyfluorene, 9-hydroxyphenanthrene, 1- and 2-naphthol in urine by first derivative synchronous fluorescence spectrometry using Tween-20 as a sensitizer
作者：
Kang, Rong-Hui;Wang, Yong-Sheng* ;Yang, Hong-Mei;Li, Gui-Rong;Tan, Man;...
期刊：
Analytica Chimica Acta ,2010年658(2):180-186 ISSN：0003-2670
通讯作者：
Wang, Yong-Sheng
作者机构：
[Yuan, Yu-Kun; Tan, Man; Shi, Lin-Fei; Kang, Rong-Hui; Li, Gui-Rong; Zhang, Jin-Quan; Yang, Hong-Mei; Xue, Jin-Hua; Wang, Yong-Sheng] Univ S China, Coll Publ Hlth, Hengyang 421001, Peoples R China.;[Xiao, 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：
Derivative synchronous fluorescence;Polycyclic aromatic hydrocarbons;Tween-20;Urine
摘要：
A novel method of first derivative synchronous fluorescence was developed for the rapid simultaneous analysis of trace 1-hydroxypyrene (1-OHP), 1-naphthol (1-NAP), 2-naphthol (2-NAP), 9-hydroxyphenanthrene (9-OHPe) and 2-hydroxyfluorene (2-OHFlu) in human urine. Only one single scan was needed for quantitative determination of five compounds simultaneously when Δλ = 10 nm was chosen. In the optimal experimental conditions, there was a linear relationship between the fluorescence intensity and the concentration of 1-OHP, 1-NAP, 2-NAP, 9-OHPe and 2-OHFlu in the range of 1.75 × 10-9 to 4.50 × 10-6 mol L-1, 3.64 × 10-8 to 2.20 × 10-4 mol L-1, 8.18 × 10-9 to 1.20 × 10-4 mol L-1, 3.26 × 10-9 to 8.50 × 10-5 mol L-1 and 4.88 × 10-9 to 5.50 × 10-6 mol L-1, respectively. The limits of detection (LOD) were found to be 5.25 × 10-10 mol L-1 for 1-OHP, 1.10 × 10-8 mol L-1 for 1-NAP, 2.46 × 10-9 mol L-1 for 2-NAP, 9.77 × 10-10 mol L-1 for 9-OHPe and 1.46 × 10-9 mol L-1 for 2-OHFlu. The proposed method is reliable, selective and sensitive, and has been used successfully in the determination of traces of 1-OHP, 1-NAP, 2-NAP, 9-OHPe and 2-OHFlu in human urine samples, whose results were in good agreement with those gained by the HPLC method. © 2009 Elsevier B.V. All rights reserved.
语种：
英文
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Comparative analysis of plant essential oils by GC-MS coupled with integrated chemometric resolution methods
作者：
Xu, Xiaona;Tang, Zhonghai;Liang, Yizeng*
期刊：
ANALYTICAL METHODS ,2010年2(4):359-367 ISSN：1759-9660
通讯作者：
Liang, Yizeng
作者机构：
[Xu, Xiaona; Liang, Yizeng] Cent S Univ, Coll Chem & Chem Engn, Res Ctr Modernizat Chinese Tradit & Herbal Drug M, Changsha 410083, Hunan, Peoples R China.;[Xu, Xiaona] Univ S China, Coll Chem & Chem Engn, Hengyang, Hunan, Peoples R China.;[Tang, Zhonghai] Hunan Agr Univ, Biosci & Biotechnol Coll, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Liang, Yizeng] C;Cent S Univ, Coll Chem & Chem Engn, Res Ctr Modernizat Chinese Tradit & Herbal Drug M, Changsha 410083, Hunan, Peoples R China.
摘要：
The volatile components obtained from drug pair (DP) Pogostemon cablin (P. cablin)-Perilla frutescens (P. frutescens) and its single herbs were analyzed for the first time by gas chromatography-mass spectrometry (GC-MS) combined with three chemometric resolution methods, namely alternative moving window factor analysis (AMWFA), heuristic evolving latent projections (HELP) and selective ion analysis (SIA). Temperature-programmed retention indices (PTRIs) were also used together with mass spectra for tentative identification of the essential oil constituents. A total of 66, 75 and 84 volatile compounds in the essential oils of the studied samples were qualitatively and quantitatively determined, representing 84.17%, 96.19% and 93.44% of the total content, respectively. Comparative analysis between the DP and its single herbs was done, which showed that the number of essential components of the DP is a little less than the sum of the number of its two single herbs, and the major components of the volatile oil of the DP, except the compound of Patchouli alcohol coming from P. cablin's essential oil, are mainly from that of P. frutescens. The results obtained may provide a useful chemical basis for future research on the correlation between the pharmacodynamic action and chemical constituents of the DP and its single herbs. Our work demonstrated that chemometric resolution techniques and PTRIs could provide a complementary and convenient method for accurate analysis of complex systems once again. © 2010 The Royal Society of Chemistry.
语种：
英文
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Determination of nicotine in tobacco with second-order spectra data of charge-transfer complex in ethanol–water binary solvents processed by parallel factor analysis
作者：
Gao, Shuqin;Liao, Lifu* ;Xiao, Xilin;Zhao, Zhiyuan;Du, Nan;...
期刊：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY ,2010年75(5):1540-1545 ISSN：1386-1425
通讯作者：
Liao, Lifu
作者机构：
[Gao, Shuqin; Du, Jiangfeng; Xiao, Xilin; Zhao, Zhiyuan; Liao, Lifu; Du, Nan] Univ S China, Coll Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Liao, Lifu] Univ S China, Coll Chem & Chem Engn, Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Liao, Lifu] U;Univ S China, Coll Chem & Chem Engn, Changsheng Rd, Hengyang 421001, Hunan, Peoples R China.
关键词：
Nicotine;Parallel factor analysis;Charge-transfer;Visible absorption spectra;Ethanol-water binary solvent
摘要：
A new spectrophotometric method for the determination of nicotine in mixtures without pre-separation has been proposed. Nicotine could react with 2,4-dinitrophenol through a charge-transfer reaction to form a colored complex. The second-order data from the visible absorption spectra of the complex in a series of ethanol–water binary solvents with various water 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 nicotine and other interferents could be analysed by using second-order calibration algorithms, and the determination of nicotine in the mixtures could be achieved. The algorithm used here was parallel factor analysis. The method has been successfully used to determine nicotine in tobacco samples with satisfactory results.
语种：
英文
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A catalytic resonance fluorometry method for determination of hydroquinone and its applications
作者：
Li, Guirong* ;Tan, Guanghui;Liu, Yunfu;Wang, Yongsheng;Liao, Lifu
期刊：
Analytical Sciences ,2009年25(4):493-497 ISSN：0910-6340
通讯作者：
Li, Guirong
作者机构：
[Wang, Yongsheng; Tan, Guanghui; Liu, Yunfu; Li, Guirong] Univ S China, Coll Publ Hlth, Hengyang 421001, Peoples R China.;[Liao, Lifu] Univ S China, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Li, Guirong] U;Univ S China, Coll Publ Hlth, Hengyang 421001, Peoples R China.
摘要：
Pyronin Y (PY) has a strong resonance fluorescence in sulfuric acid medium. The characteristics of the resonance fluorescence spectra and the factors affecting the spectra were studied. A catalytic resonance fluorometry method for the determination of hydroquinone was proposed based on the catalytic effect of hydroquinone on the oxidation of PY by potassium bromate. The oxidation of PY resulted in the decrease of the resonance fluorescence intensity. The influences of several variables on the sensitivity were studied. At the optimized conditions, the decrease of the resonance fluorescence intensity was in proportion to the concentration of hydroquinone in the range of 4.42 - 1.60 × 103 μg l-1, and the detection limit was 1.46 μg l-1. The proposed method was applied successfully for the determination of trace hydroquinone in environment samples. The relative standard deviation was less than 3.90% and the recoveries were in the range of 95.2 - 104.0%. 2009 © The Japan Society for Analytical Chemistry.
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英文
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铁氮共掺杂纳米TiO_2复合膜的制备、光谱分析及光催化活性研究
作者：
Liu Wan-bing;Deng Jian* ;Zhao Yu-bao;Xu Jin-sheng;Zhou Liang
期刊：
光谱学与光谱分析 ,2009年29(5):1394-1397 ISSN：1000-0593
通讯作者：
Deng Jian
作者机构：
[Zhou Liang; Liu Wan-bing; Deng Jian; Zhao Yu-bao] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.;[Xu Jin-sheng] Hengyang Normal Coll, Hengyang 421008, Peoples R China.
通讯机构：
[Deng Jian] U;Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Peoples R China.
关键词：
二氧化钛;溶胶-凝胶法;共掺杂;苏丹红I;光催化
摘要：
用溶胶-凝胶法制备铁、氮共掺杂纳米TiO_2凝胶,浸渍-提拉法将其镀膜于载玻片表面,经干燥、煅烧,制得Fe-TiO_(2-x)N_x复合膜;用XRD,SEM,XPS及UV-Vis对镀膜样品进行了表征.XRD分析表明,Fe-TiO_(2-x)N_x膜为锐钛矿结构,少数氮原子替代了TiO_2晶格中的氧;SEM照片说明,构成膜的粒子分散均匀,形貌一致,粒径约19 nm:UV-Vis漫反射光谱显示,Fe~(3+)掺杂可使复合膜对可见光的响应红移至740nm处;XPS图谱证明,铁、氮的掺入降低了Ti(2p_(3/2))电子结合能,从而拓宽了TiO_2在可见光区的吸收范围.以光催化降解苏丹红I为模型反应,比较了不同掺杂样品的光催化活性,结果表明,当掺杂的Fe~(3+)相对于Ti~(4-1)的原子比达到0.4%时,复合膜表现出最佳催化性能,4 h后对苏丹红I的降解率达到97%.方法制备的氮和适量铁共掺杂Fe-TiO_(2-x)N_x复合膜能协同提高TiO_2对可见光的响应能力及光催化活性,在污水处理领域具有潜在的应用价值.
语种：
中文
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Monitoring of Mycoplasma genitalium growth and evaluation of antibacterial activity of antibiotics tetracycline and levofloxacin using a wireless magnetoelastic sensor
作者：
He, Bo;Liao, Lifu* ;Xiao, Xilin;Gao, Shuqin;Wu, Yimou
期刊：
Biosensors and Bioelectronics ,2009年24(7):1990-1994 ISSN：0956-5663
通讯作者：
Liao, Lifu
作者机构：
[Gao, Shuqin; Xiao, Xilin; Liao, Lifu; He, Bo] Univ S China, Coll Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Liao, Lifu; He, Bo] Univ S China, Coll Publ Hlth, Hengyang 421001, Hunan, Peoples R China.;[Xiao, Xilin] Hunan Univ, State Key Lab Chemobiosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.;[Wu, Yimou] Univ S China, Inst Pathogen Biol, Hengyang 421001, Hunan, Peoples R China.;[Liao, Lifu] Univ S China, Coll Chem & Chem Engn, Xueyan Rd, Hengyang 421001, Hunan, Peoples R China.
通讯机构：
[Liao, Lifu] U;Univ S China, Coll Chem & Chem Engn, Xueyan Rd, Hengyang 421001, Hunan, Peoples R China.
关键词：
Magnetoelastic sensor;Mycoplasma genitalium;Wireless;Tetracycline;Levofloxacin
摘要：
Mycoplasma genitalium (Mg) is the smallest and simplest self-replicating bacteria lacking of cell wall and is a human pathogen causing various diseases. This paper describes the real-time, long-term and in situ monitoring of the growth of Mg and evaluation of the effect of the antibiotics tetracycline and levofloxacin on the growth using a wireless magnetoelastic sensor. The sensor is fabricated by coating a magnetoelastic strip with a polyurethane protecting film. In response to a time-varying magnetic field, the sensor longitudinally vibrates at a resonance frequency, 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 operation. The adhesion of Mg on the sensor surface results in a decrease in the resonance frequency, which is proportional to the concentration of Mg. The shift of the resonance frequency-time curves shows that under routine culture condition the growth curve of Mg is composed of three phases those are lag, logarithmic and stationary phase, respectively. In the presence of the antibiotics, the lag phase in the growth inhibition curves is prolonged obviously and the stationary phase is substituted by a decline phase. The growth inhibition of Mg is related to the concentration of the antibiotics. The MIC50 (minimal inhibitory concentration) of Mg incubated in the presence of the antibiotics for 120 h is calculated to be 1.5 and 0.5 μg/mL for tetracycline and levofloxacin, respectively. © 2008 Elsevier B.V. All rights reserved.
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英文
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The molecular resonance fluorescence method for determination of arsenic in hair samples
作者：
Li, Guirong* ;Liu, Yunfu;Wang, Yongsheng;Liao, Lifu
期刊：
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY ,2009年72(4):811-815 ISSN：1386-1425
通讯作者：
Li, Guirong
作者机构：
[Wang, Yongsheng; Liu, Yunfu; Li, Guirong] Univ S China, Coll Publ Hlth, Hengyang 421001, Peoples R China.;[Liao, Lifu] Univ S China, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Li, Guirong] U;Univ S China, Coll Publ Hlth, Hengyang 421001, Peoples R China.
关键词：
Molecular resonance fluorescence;Arsenic;Rhodamine B;Hair samples
摘要：
A molecular resonance fluorescence quenching method for the determination of arsenic was proposed. The method is based on the quenching effect of As (V) on the molecular resonance fluorescence of Rhodamine B (RhB) in sulfuric acid medium and in the presence of molybdate and PVA. The influences of acidity, chemical and manifold variables on the sensitivity were studied. At the optimized conditions, the linear range for the determination of arsenic was 2.0 ×10<sup>-3</sup>-0.12 μg ml<sup>-1</sup> with the detection limit of 1.20 ×10<sup>-9</sup> g ml<sup>-1</sup>. The relative standard deviations for the eleven replicate determinations of 0.006 μg ml<sup>-1</sup> and 0.060 μg ml<sup>-1</sup> of arsenic were 1.12% and 1.61%, respectively. The proposed method was applied successfully for the determination of trace arsenic in hair samples with the recoveries of 94.8-104.6%. ©2008 Elsevier B.V. All rights reserved.
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英文
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Biocompatibility and in vitro antineoplastic drug-loaded trial of titania nanotubes prepared by anodic oxidation of a pure titanium
作者：
Xiao XiLin;Yang LiXia;Guo ManLi;Pan ChunFeng;Cai QingYun* ;...
期刊：
SCIENCE IN CHINA SERIES B-CHEMISTRY ,2009年52(12):2161-2165 ISSN：1006-9291
通讯作者：
Cai QingYun
作者机构：
[Yang LiXia; Yao ShouZhuo; Xiao XiLin; Guo ManLi; Cai QingYun; Pan ChunFeng] Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.;[Xiao XiLin] Univ S China, Coll Chem & Chem Engn, Hengyang 421001, Peoples R China.
通讯机构：
[Cai QingYun] H;Hunan Univ, Coll Chem & Chem Engn, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
关键词：
drug delivery;biocompatibility;titania nanotubes;cell adhesion;cisplatin
摘要：
TiO2 nanotube (NT) arrays have been prepared by anodic oxidation of a Ti sheet, and carbon-deposited TiO2 NT arrays have been prepared by annealing TiO2 NT arrays in carbon atmosphere. The biocompatibility of the as-prepared NT arrays was investigated by observing the growth of osteosarcoma (MG-63) cells on the NT arrays. The application of the TiO2 NT arrays as a drug delivery vehicle was investigated. Both the TiO2 NTs and the carbon-modified TiO2 NTs have good biocompatibility supporting the normal growth and adhesion of MG-63 cells with no need of extracellular matrix protein coating. The one end-opened TiO2 NTs can be easily filled with drugs, working as an efficient drug delivery vehicle.
语种：
英文
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Comparison of the volatile constituents of different parts of Cortex magnolia officinalis by GC-MS combined with chemometric resolution method
作者：
Xu, Xiao-Na;Tang, Zhong-Hai;Liang, Yi-Zeng* ;Zhang, Liang-Xiao;Zeng, Mao-Mao;...
期刊：
JOURNAL OF SEPARATION SCIENCE ,2009年32(20):3466-3472 ISSN：1615-9306
通讯作者：
Liang, Yi-Zeng
作者机构：
[Xu, Xiao-Na; Deng, Jia-Hui; Zeng, Mao-Mao; Zhang, Liang-Xiao; Liang, Yi-Zeng; Tang, Zhong-Hai] Cent S Univ, Coll Chem & Chem Engn, Res Ctr Modernizat Chinese Tradit & Herbal Drug M, Changsha 410083, Hunan, Peoples R China.;[Xu, Xiao-Na] Univ S China, Coll Chem & Chem Engn, Hengyang, Hunan, Peoples R China.;[Tang, Zhong-Hai] Hunan Agr Univ, Biosci & Biotechnol Coll, Changsha, Hunan, Peoples R China.;[Liang, Yi-Zeng] Cent S Univ, Coll Chem & Chem Engn, Res Ctr Modernizat Chinese Med, Changsha 410083, Hunan, Peoples R China.
通讯机构：
[Liang, Yi-Zeng] C;Cent S Univ, Coll Chem & Chem Engn, Res Ctr Modernizat Chinese Med, Changsha 410083, Hunan, Peoples R China.
关键词：
Chemometrics;Cortex magnolia officinalis;Essential oil;GC-MS;Heuristic evolving latent projection (HELP)
摘要：
Comparison of the volatile constituents of different parts of Cortex magnolia officinalis by GC-MS combined with chemometric resolution method Volatile compositions of different parts (stem, branch and root barks) of Cortex magnolia officinalis, cultivated in China, were investigated for the first time by GC-MS with the help of heuristic evolving latent projection (HELP). Identification of components was conducted by similarity matching to NIST mass library but also assisted by comparison of temperature-programmed retention indices (PTRIs) with the data web available. A total of 90, 82 and 76 volatile compounds in the essential oils of the three samples taken from the same batch aforementioned were qualitatively and quantitatively determined, representing 84.03, 83.68 and 83.10% of the total content, respectively. Among the constituents determined, there were 50 components coexisting. Eudesmol and its isomers were shown to be the principal compounds in the studied samples, accounting for 47.66, 36.74 and 36.31%, respectively. The three kinds of isomers (a-, band c-eudesmol) in houpo volatile oils have been tentatively qualified and quantified simultaneously for the first time. By comparative analysis, significant qualitative and semi-quantitative differences and similarities were observed among the three samples. The results achieved provide a scientific evidence for further exploitation of Magnolia bark and clinical medication.
语种：
英文
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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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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.
语种：
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.
语种：
英文
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纳米锑掺杂氧化锡的制备及表征
作者：
龚圣;陈泽成;唐富龙;皮丕辉;文秀芳;...
期刊：
硅酸盐学报 ,2009年37(4):648-652 ISSN：0454-5648
通讯作者：
Yang, Z.(zhryang@scut.edu.cn)
作者机构：
[龚圣; 陈泽成; 杨卓如; 皮丕辉; 唐富龙; 程江; 文秀芳; 郑大锋] School of Chemistry and Chemical Engineering, South China University, Guangzhou 510640, China
通讯机构：
School of Chemistry and Chemical Engineering, South China University, China
关键词：
锑掺杂氧化锡;溶胶-凝胶法;超临界流体干燥;团聚
摘要：
以无机盐SnCl_4·5H_2O和SbCl_3为初始原料,以乙醇作为溶剂,采用溶胶-凝胶法结合超临界流体干燥(supercritical fluid drying,SCFD)技术制备了纳米锑掺杂氧化锡(antimony doped tin oxide.ATO)粉体.通过热重-差示扫描热分析、X射线衍射、扫描电子显微镜、透射电镜,对前驱体粒子以及ATO粒子的结构进行了分析.探讨了热处理温度、前驱体千燥方式对前驱体以及纳米粒子的形貌、粒径、分散性、晶型、结晶度的影响,并讨论了SCFD技术干燥前驱体的机理.结果表明:采用溶胶-凝胶法结合超临界CO_2干燥技术,在给定的反应条件下,能够制得疏松的、良好掺杂的四方型结构的纳米ATO粒子,粒径约15～30nm,分散性好.
语种：
中文
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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.
语种：
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.
语种：
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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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.
语种：
英文
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