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两性药物土霉素的传感电极及其选择性规律 被引量:3
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作者 姚守拙 肖俊 聂利华 《高等学校化学学报》 SCIE EI CAS 1988年第6期637-639,共3页
用离子选择性电极测定药物,研究甚多,其中大都是生物碱、季铵等类碱性药物,与非水滴定等法相比、优点并不显著,至于抗生素类药物,常用微生物法分析,缺点很多,本文报告土霉素的阳离子型与阴离子型电极,探讨了选择性规律,电极在pH1.6~3.2... 用离子选择性电极测定药物,研究甚多,其中大都是生物碱、季铵等类碱性药物,与非水滴定等法相比、优点并不显著,至于抗生素类药物,常用微生物法分析,缺点很多,本文报告土霉素的阳离子型与阴离子型电极,探讨了选择性规律,电极在pH1.6~3.2与pH8.0~11.0分别响应含质子化二甲胺基的土霉素一价阳离子与含离解B环烯醇基的土霉素一价阴离子,1gKij与季铵离子势及诱导效应指数有良好的线性关系,符合1gKij=a+bI-cZ/R,极限值7.07。 展开更多
关键词 土霉素传感电极 土霉素测定 电极选择性
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叠层型串联ISE的电分析化学性能与Nernst倍增效应 被引量:2
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作者 姚守拙 肖俊 聂利华 《高等学校化学学报》 SCIE EI CAS 1988年第6期568-573,共6页
设计了多元叠层型串联ISE,结构紧凑,组装简便,适用于微体积样液分析。对四元叠层型串联ISE的试验表明:与现行ISE比较,其线性响应斜率、测定精密度与灵敏度均增大4倍,但响应速度、选择性系数与检测下限不变。
关键词 叠层型串联ISE Nernst倍增效应
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一种新的马钱子碱液膜电极的研制与应用 被引量:1
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作者 沈国励 姚守拙 孙穗 《高等学校化学学报》 SCIE EI CAS 1984年第1期136-138,共3页
本文以四间甲苯硼酸根用作新阴离子缔合剂,并以与马钱子碱形成的离子缔合物作活性物质,代替文献中的苦酮酸-马钱子碱装制电极。电极对马钱子碱响应的线性范围为1×10^(-2)—5×10^(-6)M,检测下限可达1×10^(-6)M,对毛果云... 本文以四间甲苯硼酸根用作新阴离子缔合剂,并以与马钱子碱形成的离子缔合物作活性物质,代替文献中的苦酮酸-马钱子碱装制电极。电极对马钱子碱响应的线性范围为1×10^(-2)—5×10^(-6)M,检测下限可达1×10^(-6)M,对毛果云香碱、阿托品和辛可宁等生物碱的选择性系数及响应时间等性能,均比文献报导为佳。 展开更多
关键词 马钱子碱 选择性系数 液膜电极 离子缔合物 辛可宁 文献报导 检测下限 活性物质
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晶体管振荡器的压电晶体在电解质溶液中的频移特性及其化学应用
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作者 姚守拙 周铁安 《高等学校化学学报》 SCIE EI CAS 1988年第7期749-751,共3页
野村等曾报告压电晶体在KCl溶液中的频移(至2mm)。对于电解质溶液中压电晶体振荡规律的定量研究,未见文献报道。本文采用晶体管振荡电路,研究了石英压电晶体在电解质溶液中的频移特性与规律。发现:晶体频移与溶液电解质浓度有线性关系,... 野村等曾报告压电晶体在KCl溶液中的频移(至2mm)。对于电解质溶液中压电晶体振荡规律的定量研究,未见文献报道。本文采用晶体管振荡电路,研究了石英压电晶体在电解质溶液中的频移特性与规律。发现:晶体频移与溶液电解质浓度有线性关系,其斜率与电解质种类无显著的依赖关系. 展开更多
关键词 压电晶体 频率特性 电解质溶液 天然水中含盐量
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A review on TiO_2 nanotube arrays:Fabrication, properties, and sensing applications 被引量:11
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作者 YANG LiXia LUO ShengLian +1 位作者 CAI QingYun yao shouzhuo 《Chinese Science Bulletin》 SCIE EI CAS 2010年第4期331-338,共8页
Fabrication, properties, and sensing applications of TiO2 nanotubes have been reviewed, and the highly ordered TiO2 nanotube arrays made by anodic oxidation in fluoride-contained electrolytes highlighted. The effect o... Fabrication, properties, and sensing applications of TiO2 nanotubes have been reviewed, and the highly ordered TiO2 nanotube arrays made by anodic oxidation in fluoride-contained electrolytes highlighted. The effect of anodization parameters (electrolyte, pH, and voltage) on the titania nanotube size and shape were discussed. The excellent biocompatibility of TiO2, the high orienta- tion, the large surface area with tunable pore sizes, as well as the high electron transfer rate along with the nanotubes make TiO2 nanotube array an ideal substrate for the sensor's fabrication and application. The sensors based on the TiO2 nanotube arrays for sensing hydrogen, oxygen, humidity, glucose and hydrogen peroxide all exhibited low detection limit, high stability, very good reproducibility and high sensitivity. 展开更多
关键词 纳米管阵列 TIO2 传感器 应用 二氧化钛纳米管 制备 审查 性能
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The direct electrochemistry of glucose oxidase based on the synergic effect of amino acid ionic liquid and carbon nanotubes 被引量:4
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作者 WANG MengDong DENG ChunYan +2 位作者 NIE Zhou XU XiaHong yao shouzhuo 《Science China Chemistry》 SCIE EI CAS 2009年第11期1991-1998,2033-2034,共10页
Amino acid ionic liquids(AAILs) have attracted much attention due to their special chemical and physical properties,especially their outstanding biocompatibility and truly green aspect.In this work,a novel electrochem... Amino acid ionic liquids(AAILs) have attracted much attention due to their special chemical and physical properties,especially their outstanding biocompatibility and truly green aspect.In this work,a novel electrochemical biosensing platform based on AAILs/carbon nanotubes(CNTs) composite was fabricated.AAILs were used as a novel solvent for glucose oxidase(GOD) and the GOD-AAILs/CNTs/GC electrode was conveniently prepared by immersing the carbon nanotubes(CNTs) modified glassy carbon(GC) electrode into AAILs containing GOD.The direct electrochemistry of GOD on the GOD-AAILs/CNTs/GC electrode has been investigated and a pair of reversible peaks was obtained by cyclic voltammetry.The immobilized glucose oxidase could retain bioactivity and catalyze the reduction of dissolved oxygen.Due to the synergic effect of AAILs and CNTs,the GOD-AAILs/CNTs/GC electrode shows excellent electrocatalytic activity towards glucose with a linear range from 0.05 to 0.8 mM and a detection limit of 5.5 μM(S/N = 3).Furthermore,the biosensor exhibits good stability and ability to exclude the interference of commonly coexisting uric and ascorbic acid.Therefore,AAILs/CNTs composite can be a good candidate biocompatible material for the direct electrochemistry of the redox-active enzyme and the construction of third-generation enzyme sensors. 展开更多
关键词 AMINO acid ionic liquids(AAILs) carbon nanotubes(CNTs) GLUCOSE oxidase(GOD) direct ELECTROCHEMISTRY GLUCOSE sensor
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Assembly of layer-by-layer films of superoxide dismutase and gold nanorods:A third generation biosensor for superoxide anion 被引量:1
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作者 WANG MengDong HAN YiTao +4 位作者 LIU XingXing NIE Zhou DENG ChunYan GUO ManLi yao shouzhuo 《Science China Chemistry》 SCIE EI CAS 2011年第8期1284-1291,共8页
Based on the layer-by-layer self-assembly of positively charged cetyltrimethylammonium bromide (CTAB) wrapped gold na- norods (AuNRs) and negatively charged superoxide dismutase (SOD) from their aqueous solution... Based on the layer-by-layer self-assembly of positively charged cetyltrimethylammonium bromide (CTAB) wrapped gold na- norods (AuNRs) and negatively charged superoxide dismutase (SOD) from their aqueous solutions on cysteine modified gold electrode (Cys/Au), a third generation electrochemical biosensor ((SOD/AuNRs)2/Cys/Au) for superoxide anion (02"-) was developed. The two layers assembly of SOD/AuNRs can significantly enhance the direct electron transfer between SOD and the electrode. The functional enzymatic activities of the SOD offer an electrochemical approach to the determination of 02"-. In the reductive regions, the proposed sensor exhibits excellent analytical performances, such as wide linear range (200 nM to 0.2 mM O2-), low detection limit (100 nM O2-), high sensitivity (22.11 nA cm-2 μM-1), short response time (less than 5 s), good stability and reproducibility, while no obvious interferences are caused by commonly met interfering species including hydrogen peroxide (H202), uric acid (UA) and ascorbic acid (AA). 展开更多
关键词 superoxide dismutase (SOD) gold nanorods (AuNRs) layer-by-layer self-assembly direct electrochemistry superoxideanion sensor
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Electrochemical quartz crystal microbalance study on the two-electrode-system cyclic voltammetric behavior of Prussian blue films
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作者 TAN YueMing XIE QingJi +6 位作者 HUANG JinHua CHEN DaiWu CHEN Xin TU XinMan LI YunLong GE Bin yao shouzhuo 《Science China Chemistry》 SCIE EI CAS 2008年第11期1074-1086,共13页
A two-channel electrochemical quartz crystal microbalance (EQCM) was used to investigate the cyclic voltammetric behavior of two Prussian blue (PB) film-modified Au electrodes in a two-electrode con-figuration in aque... A two-channel electrochemical quartz crystal microbalance (EQCM) was used to investigate the cyclic voltammetric behavior of two Prussian blue (PB) film-modified Au electrodes in a two-electrode con-figuration in aqueous solution. The redox peaks observed in the two-electrode cyclic voltammogram (CV) are assigned to the intrinsic redox transitions among the Everitt's salt, PB, and Prussian yellow for the film itself, the redox process of the Au substrate and the redox process of small-quantity ferri-/ferrocyanide impurities entrapped in the PB film, as also supported by ultraviolet-visible (UV-Vis) spectroelectrochemical data. The profile of the two-electrode solid-state CV for the PB powder sand-wiched between two gold-coated indium-tin oxide (ITO) electrodes is similar to that for two PB-modified Au electrodes in aqueous solution, implying similar origins for the corresponding redox peaks. The two-channel EQCM method is expected to become a highly effective technique for the studies of the two-electrode electrochemical behaviors of many other species/materials. 展开更多
关键词 Prussian blue (PB) two-electrode liquid-/solid-state cyclic VOLTAMMETRIC BEHAVIOR two-channel electrochemical quartz crystal MICROBALANCE UV-Vis SPECTROELECTROCHEMISTRY
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Biocompatibility and in vitro antineoplastic drug-loaded trial of titania nanotubes prepared by anodic oxidation of a pure titanium
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作者 XIAO XiLin YANG LiXia +3 位作者 GUO ManLi PAN ChunFeng CAI QingYun yao shouzhuo 《Science China Chemistry》 SCIE EI CAS 2009年第12期2161-2165,共5页
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-pr... 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. 展开更多
关键词 DRUG delivery BIOCOMPATIBILITY TITANIA NANOTUBES cell adhesion CISPLATIN
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Separation of acidic and basic proteins by capillary electrophoresis using gemini surfactants and gemini-capped nanoparticles as buffer additives
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作者 LIU Qian LI YanQing +1 位作者 YANG YanMin yao shouzhuo 《Science China Chemistry》 SCIE EI CAS 2009年第10期1666-1676,共11页
This paper demonstrated simultaneous separation of acidic and basic proteins using cationic gemini surfactants as buffer additives in capillary electrophoresis. We showed that even at a low concentration (0.1 mmol... This paper demonstrated simultaneous separation of acidic and basic proteins using cationic gemini surfactants as buffer additives in capillary electrophoresis. We showed that even at a low concentration (0.1 mmol·L-1) of alkanediyl-α,ω-bis(dimethyloctadecylammonium bromide) (18-s-18), the wall adsorption of both acidic and basic proteins could be effectively suppressed under acidic conditions. Smaller micelle size (e.g., s=5-8) is more effective for the separation of acidic proteins than larger micelle size (e.g., s<4 or >10). Varying the spacer length of gemini surfactants can influence the electrophoretic mobility and selectivity of proteins to achieve the desired separation. Under the optimized conditions, RSDs of the migration time were less than 0.8% and 2.2% for run-to-run and day-to-day assays, respectively, and protein recoveries ranged from 79% to 100.4%. Furthermore, we also investigated the use of gemini surfactant-capped gold nanoparticles (gemini@AuNPs) as buffer additives in protein separation. Introduction of AuNPs into the buffer shortened the analysis time and slightly improved the separation efficiencies. Finally, we presented the applications of this method in the analysis of bio-logical samples, including plasma, red blood cells and egg white. 展开更多
关键词 GEMINI surfactant protein SEPARATION CAPILLARY ELECTROPHORESIS gold nanoparticle
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A piezoelectric spectro- electrochemical study on the structural interconversion for poly(o-phenylenediamine) between its ladder structure with phenazine units and polyaniline-like chains
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作者 TU Xinman XIE Qingji +2 位作者 WANG Meiling ZHANG Youyu yao shouzhuo 《Chinese Science Bulletin》 SCIE EI CAS 2005年第15期1598-1604,共7页
The combination of reflectance UV-Vis spec- troelectrochemistry with electrochemical quartz crystal microbalance (EQCM) and separate reflectance FTIR char- acterization were used to investigate the structural intercon... The combination of reflectance UV-Vis spec- troelectrochemistry with electrochemical quartz crystal microbalance (EQCM) and separate reflectance FTIR char- acterization were used to investigate the structural intercon- version for poly(o-phenylenediamine) (PoPD) between its ladder structure with phenazine units and polyaniline-like linear chains. The poly(o-phenylenediamine) films potentio- statically (0.8 V vs. SCE) grew on Au electrodes from 0.20 mol·L?1 H2SO4 (PoPD1) or 0.40 mol·L?1 NaOH (PoPD2) aque- ous solution containing 0.20 mol·L?1 Na2SO4 + 0.10 mol·L?1 o-phenylenediamine. By considering the mass of deposited PoPD2 film obtained from the EQCM data and the charge consumed under the current peak at ca. 0.6 V vs. SCE for oxidation of -NH2 groups in as-prepared PoPD2 during po- tential cycling in 0.10 mol·L-1 aqueous H2SO4, the molar per- centage of the polyaniline-like chains was estimated to be 19% (relative to total phenylenediamine units), being in agreement with the result obtained from a formaldehyde- combination experiment through the aminocarbonyl reaction. After 40-cycle potential sweeps between 0.2 and 0.8 V vs. SCE the polyaniline-like chains in PoPD2 could be com- pletely converted via intramolecular cyclization into the lad- der structure with phenazine units. However, PoPD1 was found to be perfectly composed of the ladder structure with phenazine units, and after 40-cycle potential sweeps between ?0.4 and 0.1 V vs. SCE only 2.5% in molar percentage of PoPD’s ladder structure could be converted into polyani line-like chains, suggesting that the ladder structure with phenazine units is thermodynamically more stable due to its possessing higher conjugation. 展开更多
关键词 压电效应 光谱电子学 阶梯结构 聚乙烯 结构互换
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Electrochemical quartz crystal microbalance study on Au-supported Pt adlayers for electrocatalytic oxidation of methanol in alkaline solution
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作者 HUANG Zhao JIA Xue’En +5 位作者 XIE QingJi TAN YueMing HUANG SuQing HUANG JinHua MENG Yue yao shouzhuo 《Science China Chemistry》 SCIE EI CAS 2010年第11期2349-2356,共8页
Underpotential deposition(UPD) of Cu on an Au electrode followed by redox replacement reaction(RRR) of CuUPD with a Pt source(H2PtCl6 or K2PtCl4) yielded Au-supported Pt adlayers(for short,Pt(CuUPD-Pt4+)n/Au for H2PtC... Underpotential deposition(UPD) of Cu on an Au electrode followed by redox replacement reaction(RRR) of CuUPD with a Pt source(H2PtCl6 or K2PtCl4) yielded Au-supported Pt adlayers(for short,Pt(CuUPD-Pt4+)n/Au for H2PtCl6,or Pt(CuUPD-Pt2+)n/Au for K2PtCl4,where n denotes the number of UPD-redox replacement cycles).The electrochemical quartz crystal microbalance(EQCM) technique was used for the first time to quantitatively study the fabricated electrodes and estimate their mass-normalized specific electrocatalytic activity(SECA) for methanol oxidation in alkaline solution.In comparison with Pt(CuUPD-Pt2+)n/Au,Pt(CuUPD-Pt4+)n/Au exhibited a higher electrocatalytic activity,and the maximum SECA was obtained to be as high as 35.7 mA ?g?1 at Pt(CuUPD-Pt4+)3/Au.The layer-by-layer architecture of Pt atoms on Au is briefly discussed based on the EQCM-revealed redox replacement efficiency,and the calculated distribution percentages of bare Au sites agree with the experimental results deduced from the charge under the AuOx-reduction peaks.The EQCM is highly recommended as an efficient technique to quantitatively examine various electrode-supported catalyst adlayers,and the highly efficient catalyst adlayers of noble metals are promising in electrocatalysis relevant to biological,energy and environmental sciences and technologies. 展开更多
关键词 underpotential deposition of Cu redox replacement using H2PtCl6 or K2PtCl4 Au-supported Pt adlayers EQCM electrocatalyzed oxidation of methanol in alkaline solution
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