甲基对硫磷在聚噻吩/纳米二氧化钛修饰玻碳电极上的电化学行为及其测定
作者:
许金生;邓健;匡云飞
期刊:
分析试验室 ,2011年30(9):66-70 ISSN:1000-0720
作者机构:
[许金生; 匡云飞] 衡阳师范学院化学与材料科学系;[邓健] 南华大学化学化工学院
关键词:
聚噻吩;二氧化钛;化学修饰电极;甲基对硫磷
摘要:
用循环伏安法(CV)、线性扫描溶出伏安法(LSSV)研究了甲基对硫磷(MPT)在聚噻吩/纳米二氧化钛修饰玻碳电极(PTh-NTiO2/GCE)上的电化学行为。实验表明,该修饰电极能显著提高MPT的氧化还原峰电流,在B-R缓冲溶液(pH 5.72)中,于-0.662V(vs.SCE)处产生灵敏的不可逆还原峰,其峰电流与MPT浓度在0.100~3.00μg/mL范围内呈良好的线性关系(r=0.9989),检测限达50.0 ng/mL(S/N=3)。在0.500μg/mL MPT溶液中连续扫描11次,RSD=2.0%。用此方法测定了蔬菜、果皮及水样中MPT。
语种:
中文
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分散液液微萃取—分光光度法测定水中痕量汞
作者:
李辉;颜晓娜;邓健;刘雅婷;王丽丽;...
期刊:
南华大学学报(自然科学版) ,2011年25(2):74-78 ISSN:1673-0062
作者机构:
南华大学化学化工学院,湖南衡阳,421001;[邓健; 王丽丽; 颜晓娜; 李旭婷; 刘雅婷; 李辉] 南华大学
关键词:
分散液液微萃取;分光光度法;汞;水
摘要:
以四氯化碳为萃取剂,丙酮为分散剂,硫代米式酮(Thio.Michler,Sketone,TMK)为汞的螯合剂,建立了水中痕量汞分散液液微萃取一分光光度法测定的新方法.对分散液一液微萃取条件和分光光度法测定的最佳实验参数进行优化,包括溶液的pH值,萃取剂与分散剂的种类与用量,螯合剂硫代米式酮的用量,萃取时间等.在最佳实验条件下,汞的浓度在110~420ng/mL范围内与吸光度呈良好线性关系,相关系数r=0.9981,富集倍数为30,检出限为55ng/mL,相对标准偏差(RSD)为4.2%(/7,=8),回收率为92%~108%.实验结果表明,该方法简便,快速,回收率高,成本低、富集效率高且对环境友好,适用于水中痕量金属汞的测定.
语种:
中文
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基于β-环糊精/SiO_2手性固定相的薄层色谱法拆分DL-萘普生的研究
作者:
王丽丽;何毅;谢达栋;王皖;邓健
期刊:
应用化工 ,2011年40(6):1011-1014 ISSN:1671-3206
作者机构:
南华大学化学化工学院;[何毅; 谢达栋; 王皖] 南华大学船山学院;[邓健; 王丽丽] 南华大学
关键词:
DL-萘普生;β-环糊精;薄层色谱;手性拆分
摘要:
用β-环糊精(-βCD)键合硅胶合成了一种新型的β-环糊精/S iO2手性固定相,用红外对其进行了结构鉴定。将该手性固定相用于薄层色谱分离萘普生外消旋体,考察多种溶剂对萘普生外消旋体的展开效果,结果表明,乙酸乙酯∶氯仿(体积比)=1∶4为展开剂时,合成的手性固定相对DL-萘普生的分离度为1.45,具有很好的拆分DL-萘普生的能力。
语种:
中文
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Spectrophotometric determination of melamine in milk by rank annihilation factor analysis based on pH gradual change-UV spectral data
作者:
Liu, Yating;Deng, Jian* ;An, Lin;Liang, Jun;Chen, Fei;...
期刊:
Food Chemistry ,2011年126(2):745-750 ISSN:0308-8146
通讯作者:
Deng, Jian
作者机构:
[Liu, Yating; Chen, Fei; An, Lin; Wang, Hui; Deng, Jian; Liang, Jun] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
通讯机构:
[Deng, Jian] U;Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
关键词:
Melamine;Milk;PH-spectra;Rank annihilation factor analysis
摘要:
A new spectrophotometric method has been developed in this paper to determine melamine in milk by applying rank annihilation factor analysis (RAFA) based on pH gradual change-UV spectral data (pH-spectra). In the proposed method, the spectra of the sample solutions at different pH data points were recorded and the pH-spectra bilinear data matrix was generated. Based on these data, the RAFA was then applied to calculate the concentration of melamine in milk. The experiments have been conducted and the results were satisfactory. Under the optimised conditions, linearity of the proposed method was in the range of 0.04-4.0 μg mL-1 for calibration samples, and 0.04-3.5 μg mL-1 for the mixed solutions of melamine with the background milk components. The detection limit (DL) was 12 ng mL-1. The relative predictive error (RPEs) and root mean square error of prediction (RMSEP) of applying RAFA were 0.91% and 0.0151, respectively. © 2010 Elsevier Ltd. All rights reserved.
语种:
英文
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ICP-OES内标法同时测定纺织品中砷,锑,铅等9种可提取元素
作者:
陈飞;徐殿斗;唐晓萍;刘阳;高峰;...
期刊:
分析试验室 ,2011年30(4):89-92 ISSN:1000-0720
作者机构:
南华大学化学化工学院;[徐殿斗] 中国科学院高能物理研究所;[高峰; 张灵虓; 刘阳; 唐晓萍; 杨冬] 北京出入境检验检疫局;[陈飞; 邓健; 王慧; 刘雅婷] 南华大学
关键词:
重金属;纺织品;内标法
摘要:
建立了ICP-OES内标法同时测定纺织品中砷、锑、铅、镉、铬、钴、铜、镍、汞等9种有害元素的检测方法.采用钇(Y)作为内标添加物,有效补偿了酸性汗液中钠元素造成的背景干扰.结果表明:砷、锑、铅、镉、铬、钴、铜、镍、汞等9种元素的谱线强度与其浓度在(0.03~0.30)~10 mg/L范围内均具有良好的线性关系,检出限分别为14.2、91.5、45.6、13.2、13.5、10.2、45.7、11.4、57.2 μg/L,在2.0 mg/kg加标水平下各元素的回收率分别为91.5 %、107 %、86.5 %、94.0 %、93.8 %、90.0 %、93.5 %、91.5 %、97.0 %,相对标准偏差(RSD,n=10)分别是1.2 %、0.7 %、2.0 %、0.1 %、0.2 %、1.6 %、0.8 %、2.4 %、3.0%.同ICP/MS检测的结果比较相近,相同仪器条件下本方法的精密度和准确度明显优于ICP-OES外标法.
语种:
中文
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HPLC-RID法测定托吡酯含量及主要有关物质
作者:
王慧;吴松;戚燕;郝玲花;邓健
期刊:
药物分析杂志 ,2011年31(2):266-269 ISSN:0254-1793
作者机构:
[王慧; 邓健] 南华大学化学化工学院;[吴松; 戚燕; 郝玲花] 中国医学科学院中国协和医科大学药物研究所
关键词:
托吡酯;含量测定;有关物质
摘要:
目的:建立托吡酯含量测定及有关物质检查的方法.方法:采用Phenomenex Luna C8柱(250 mm×4.6 mm,5μm),柱温35℃,光学元件温度:35℃;流动相为乙腈-0.01 mol. L-1醋酸铵溶液(用醋酸调节pH为4.2)(1:2),流速为1.0 mL.min-1,示差折光检测器.结果:高效液相色谱法测定的线性范围为:托吡酯5~15 mg.mL-1,相关系数r=0.9999;杂质10~90μg.mL-1,相关系数r=0.9999;日内精密度:托吡酯RSD为0.3%(n=6),杂质RSD为1.0%(n=6);日间精密度:托吡酯RSD为1.0%(n=5),杂质RSD为1.0%(n=5).结论:方法简单,灵敏度较好,可用于托吡酯的含量检测和主要杂质的研究
语种:
中文
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Simultaneous spectrophotometric determination of trace amount of malachite green and crystal violet in water after cloud point extraction using partial least squares regression
作者:
An, Lin;Deng, Jian* ;Zhou, Liang;Li, Hui;Chen, Fei;...
期刊:
Journal of Hazardous Materials ,2010年175(1-3):883-888 ISSN:0304-3894
通讯作者:
Deng, Jian
作者机构:
[Liu, Yating; Chen, Fei; An, Lin; Wang, Hui; Li, Hui; Deng, Jian] Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.;[Zhou, Liang] Univ S China, Sch Publ Hlth, Hengyang 421001, Hunan, Peoples R China.
通讯机构:
[Deng, Jian] U;Univ S China, Sch Chem & Chem Engn, Hengyang 421001, Hunan, Peoples R China.
关键词:
Cloud point extraction;Crystal violet;Malachite green;Partial least squares regression;Spectrophotometry
摘要:
In this work, a new method has been proposed to simultaneously determine the trace amount of malachite green and crystal violet from aqueous solution by spectrophotometry after cloud point extraction (CPE) using partial least squares regression. The optimal extraction and operating conditions, such as pH, reagents concentration and effect of time and temperature, and so on, have been investigated using the non-ionic surfactant Triton X-114. The maximum absorption wavelength for malachite green and crystal violet is 624 and 579 nm, respectively;linearity is obeyed in the range of 9.9-800 and 16-1000 ng mL<sup>-1</sup> with detection limit of 2.9 and 4.8 ng mL<sup>-1</sup>, and the root mean square error of prediction (RMSEP) are 0.0197 and 0.0343, respectively. The proposed method has been applied successfully to simultaneously determine the trace amount of malachite green and crystal violet in real matrix samples with the recoveries of 92.45-102.5%. ©2009 Elsevier B.V. All rights reserved.
语种:
英文
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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.
语种:
英文
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浊点萃取-分光光度法测定水样中痕量结晶紫
作者:
安林;余柏威;庞庆胜;李辉;周亮;...
期刊:
分析试验室 ,2010年29(3):63-65 ISSN:1000-0720
作者机构:
南华大学化学化工学院,衡阳,421001;河南省平顶山市质量技术监督检验测试中心,平顶山,467000;南华大学公共卫生学院,衡阳,421001
关键词:
浊点萃取;分光光度法;结晶紫
摘要:
提出了浊点萃取-分光光度法测定水样中结晶紫的新方法,研究了非离子表面活性剂Triton X-114浊点萃取的最佳条件,如pH、试剂用量、平衡时间和温度等. 结晶紫的最大吸收波长为579 nm,标准曲线的线性范围是32~700 ng/mL,检出限是9.8 ng/mL,富集倍率为20. 结晶紫的浓度在0.2和0.5 μg/mL时的相对标准偏差分别为2.5%和1.7% (n=8). 应用本方法测定水样中的痕量结晶紫,平均回收率95.2%~98.1%.
语种:
中文
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艾滋病高危人群血清腺苷脱氨酶的活性及临床意义
作者:
何战胜;许金生;邓健;左亚利
期刊:
中南医学科学杂志 ,2010年38(4):566-567 ISSN:2095-1116
作者机构:
南华大学,医学院,湖南,衡阳,421001;[许金生] 衡阳师范学院;南华大学,化学化工学院;[左亚利] 衡阳市第三人民医院;[何战胜; 邓健] 南华大学
关键词:
腺苷脱氨酶;艾滋病;人类免疫缺陷病毒
摘要:
目的 探讨血清腺苷脱氨酶(ADA)活性在人类免疫缺陷病毒(HIV)临床诊断及疗效观察中的价值. 方法 应用全自动化学方法测定13例吸毒者、16例性病患者和7例艾滋病患者血清ADA活性. 结果 HIV感染者在血中检测出HIV抗体阳性之前,血清ADA活性就已经增高,在抗体转阳时达到最高值,以后维持较高活性水平. 结论 测定血清ADA活性可作为HIV感染者的临床诊断和治疗疗效观察的一个有效指标.
语种:
中文
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“研究性学习”教育教学模式的探索与实践
作者:
聂长明;文松年;袁亚莉;邓健;廖力夫
期刊:
中国地质教育 ,2009年18(02):66-70 ISSN:1006-9372
作者机构:
南华大学,化学化工学院,湖南,衡阳,421001;[文松年; 聂长明; 袁亚莉; 邓健; 廖力夫] 南华大学
关键词:
研究性学习;教学模式;实践模式
摘要:
\"研究性学习\"教育是指在教师指导下,研究生从自然、社会和生活实际中选择和确定相关的专题进行研究,并在研究过程中主动获取知识、应用知识、解决问题的学习活动。其目标是:获得亲身参与研究的体验,培养发现问题和解决问题的能力,培养收集、分析和利用信息的能力,学会分享与合作,培养科学态度和科学道德,培养对社会的责任心和使命感。本文结合\"研究性学习\"的教学实践,从\"研究性学习\"教育的必要性、实践模式以及实践方法3个方面阐述了\"研究性学习\"教育教学模式。
语种:
中文
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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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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.
语种:
英文
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QSAR结合人工神经网络预测取代氯苯酚生物毒性
作者:
肖方竹;邓健;彭国文;周亮;许金生
期刊:
化学研究与应用 ,2009年21(6):888-890 ISSN:1004-1656
作者机构:
[肖方竹; 周亮] 南华大学公共卫生学院;[邓健; 彭国文] 南华大学化学化工学院;[许金生] 衡阳师范学院
关键词:
人工神经网络;取代氯苯酚;生物毒性;定量构效关系
摘要:
取代氯苯酚类化合物是有机化学工业中必不可少的重要原料,现已有邻氯苯酚等4种酚类化合物被美国环保局定为优先控制的有机污染物~([1]).对此,国内外有关专家对取代氯苯酚的生物毒性进行了广泛研究,但都没有得到有效的构效关系~([2-3]).因此,通过建立取代氯苯酚生物毒性与分子结构间的定量关系,对于预测其生物毒性有着实际的意义.
语种:
中文
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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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A new species of Dactylellina producing adhesive knobs and non-constricting rings to capture nematodes
作者:
Su, Hongyan* ;Hao, Yu'e;Yang, Xiaoyan;Yu, Zefen;Deng, Jingshi;...
期刊:
MYCOTAXON ,2008年105:313-316 ISSN:0093-4666
通讯作者:
Su, Hongyan
作者机构:
[Yang, Xiaoyan; Su, Hongyan] Dali Coll, Dept Biol & Chem, Dali 67000, Peoples R China.;[Hao, Yu'e] Univ S China, Dept Publ Hlth, Hengyang 421001, Peoples R China.;[Yu, Zefen; Mo, Minghe; Deng, Jingshi] Yunnan Univ, Lab Conservat & Utilizat Bioresources, Kunming 650091, Peoples R China.
通讯机构:
[Su, Hongyan] D;Dali Coll, Dept Biol & Chem, Dali 67000, Peoples R China.
关键词:
Antagonist of parasitic nematodes;Biological control;Predacious fungi;Trapping devices
摘要:
A nematode-trapping fungus, Dactylellina daliensis, is illustrated and described as a new species. This fungus is primarily characterized by producing elongate fusoid conidia with 1-13 (mostly 6-8) septa on the denticles of conidiophore and capturing nematodes by means of stalked adhesive knobs and non-constricting rings.
语种:
英文
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氮铈共掺杂纳米TiO2的制备和光催化活性研究
作者:
周亮;邓健;廖力夫;赵玉宝;肖方竹;...
期刊:
应用化工 ,2008年37(8):857-860+878 ISSN:1671-3206
作者机构:
南华大学,公共卫生学院,湖南,衡阳,421001;南华大学,化学化工学院,湖南,衡阳,421001;[周亮; 安林; 肖方竹; 邓健; 赵玉宝; 廖力夫] 南华大学
关键词:
甲基橙;氮铈共掺杂;水解沉淀;光催化
摘要:
采用水解沉淀法分别制备了未掺杂、氮掺杂和不同Ce4+浓度的氮、铈共掺杂纳米二氧化钛粉体,并利用XRD、TEM、XPS、UV-vis对其进行表征,以甲基橙的光催化降解为模型反应,考察其在太阳光下的光催化活性.结果表明,450 ℃下煅烧3 h制备的纳米TiO2粉体均为锐态矿型,铈的掺入使衍射峰宽化;氮、铈共掺杂能抑制锐钛矿晶粒的生长,减少团聚,使晶粒细化.N取代了TiO2晶格中的部分氧原子形成N2p掺杂能级,而铈以Ce4+、Ce3+两种价态存在于TiO2中.氮、铈的协同作用不仅使TiO2的光吸收带边红移,也能明显提高TiO2在紫外光区的吸收强度.光催化降解甲基橙实验结果表明:当Ce4+掺杂量为0.6%时,Ce-N-TiO2的光催化效率最高,约为纯二氧化钛的2倍.
语种:
中文
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Zr和N共掺杂TiO_2的制备、表征及其光催化性能
作者:
丁坚强;许金生;袁亚莉;邓健;李乐;...
期刊:
中国有色金属学报 ,2008年18(12):2212-2217 ISSN:1004-0609
通讯作者:
Ding, J.-Q.
作者机构:
[袁亚莉; 李乐; 郭建波; 许金生; 丁坚强] School of Public Health, University of South China, Hengyang 421001, China;[袁亚莉; 邓健] School of Chemistry and Chemical Engineering, University of South China, Hengyang 421001, China;[许金生] Department of Chemistry and Materials Science, Hengyang Normal University, Hengyang 421008, China
通讯机构:
School of Public Health, University of South China, China
关键词:
纳米TiO2;掺杂;光催化;水解沉淀法;甲基橙
摘要:
利用水解沉淀法制备TiO2、N-TiO2、Zr-TiO2以及Zr和N共掺杂的纳米TiO2,用TEM、XRD、XPS和UV-Vis-DRs等方法对光催化剂的结构、元素组成和对可见光的响应等性能进行表征,并以甲基橙为目标降解物,测试其光催化降解效果。结果表明,Zr掺杂能够降低TiO2光催化剂的粒径;Zr和N共掺杂可以起到协同作用,提高样品的光催化活性,同时增强样品在可见光区的响应。Zr和N共掺杂TiO2在高压汞灯光照下比TiO2具有更好的光催化效果,2%Zr和N共掺杂TiO2光照3h后对甲基橙的降解率比纯TiO2提高32%。
语种:
中文
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尿海藻糖酶活性催化光度法测定
作者:
邓健;廖力夫;吕笑笑;刘传湘;匡艳华
期刊:
中国公共卫生 ,2008年24(1):64-65 ISSN:1001-0580
作者机构:
南华大学化学化工学院有机物化教研室,衡阳,421001;南华大学附属第一医院检验科
关键词:
酶活性测定法;尿海藻糖酶;催化光度法;近端肾小管上皮细胞;肾小管-间质疾病;肠粘膜上皮细胞;慢性肾小球疾病;肾小管损伤
摘要:
海藻糖酶(Trehalase,T,EC3.2.1.28)是许多动物体内存在的一种胞外酶。人海藻糖酶仅产生于肾小管和小肠粘膜上皮细胞。由于尿海藻糖酶只特异性来源于损伤的近端肾小管上皮细胞,并且海藻糖酶在尿液中生理活性稳定,因此,尿海藻糖酶可作为一种较理想的反映近端肾小管损伤的标志物,其活性测定对于重金属盐中毒与药物的肾毒性、急慢性肾小球疾病以及肾小管-间质疾病等的诊断和病情监测具有重要应用价值。已见报道的尿海藻糖酶活性测定法有单克隆抗体免疫化学法和生物化学测定法。
语种:
中文
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纳米膜与硅烷化表面修饰相结合制备基因芯片载体
作者:
肖方竹;邓健;彭国文;刘万兵;周亮;...
期刊:
南华大学学报(自然科学版) ,2007年21(4):112-114 ISSN:1673-0062
作者机构:
南华大学公共卫生学院,湖南衡阳,421001;南华大学化学化工学院,湖南衡阳,421001
关键词:
溶胶-凝胶法;纳米薄膜;硅烷化;基因芯片载体;扫描电镜(SEM)
摘要:
将洁净的玻片,在以溶胶-凝胶法制备的TiO2胶体溶液中浸渍提拉成膜,再将组装纳米薄膜的玻片进行硅烷化处理.用傅里叶变换红外光谱、扫描电镜、荧光显微镜对样品进行表征.结果表明,带氨基或醛基的"手臂分子"可以固定在纳米薄膜组装的玻片上,并且荧光信号强于仅用硅烷化处理的玻片.本研究建立的芯片载体表面化学修饰方法有较高的效率,操作简便易行,具备广阔的应用前景.
语种:
中文
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