搜索结果: 31-45 共查到“知识库 电化学”相关记录1653条 . 查询时间(1.805 秒)
采用一步法静电纺丝技术制备了具有超亲水特性的氧化锰/碳纳米纤维（MnOx/CNFs）复合柔性膜电极材料，并通过X射线衍射，扫描电子显微镜和透射电子显微镜等对复合材料进行了表征.电化学性能测试结果表明，复合材料的电容性能优于单一材料，醋酸锰质量分数为40%时制得的复合纳米纤维电极（MC-4）在1 A/g电流密度下，于2 mol/L KOH电解液中的比电容高达1112.5 F/g，10 A/g电流密度...
介孔硅材料组装DNA电化学生物膜电极的制备
二氧化硅纳米材料 DNAzymes 亚甲基蓝 电化学生物膜电极
2018/9/30
利用马来酰亚胺基类酯(Sulfo-SMCC)为异双功能偶联剂,将巯基修饰好的DNAzyme 共价固定在已负载亚甲基蓝的氨基化介孔二氧化硅纳米材料上,并将壳聚糖混合后滴涂至碳糊电极表面上形成了电化学生物传感膜.利用循环伏安法、电化学阻抗法等对膜电极的制备过程进行了相应的表征.结果表明:基于巯基修饰的DNAzyme已成功固定于二氧化硅纳米材料上,并在碳糊电极表面上形成了稳定的膜.
Measuring Electric Fields and Noncovalent Interactions Using the Vibrational Stark Effect
Organic Chemicals Proteins Vibration Models,Molecular Static Electricity
2016/5/25
Over the past decade, we have developed a spectroscopic approach to measure electric fields inside matter with high spatial (<1 Å) and field (<1 MV/cm) resolution. The approach hinges on exploiti...
Extreme Electric Fields Power Catalysis in the Active Site of Ketosteroid Isomerase
Electric Power Catalysis Active Site Ketosteroid Isomerase
2016/5/25
Enzymes use protein architecture to impose specific electrostatic fields onto their bound substrates, but the magnitude and catalytic effect of these electric fields have proven difficult to quantify ...
Putative Hydrogen Bond to Tyrosine M208 in Photosynthetic Reaction Centers from Rhodobacter capsulatus Significantly Slows Primary Charge Separation
Coagulation Nano TiO2 Nano Al2O3 Breakage Fractal dimension
2016/5/25
Slow, ～50 ps, P* → P(+)HA(-) electron transfer is observed in Rhodobacter capsulatus reaction centers (RCs) bearing the native Tyr residue at M208 and the single amino acid change of isoleucine at M20...
Calculations of the Electric Fields in Liquid Solutions
Calculations Electric Fields Liquid Solutions
2016/5/25
The electric field created by a condensed-phase environment is a powerful and convenient descriptor for intermolecular interactions. Not only does it provide a unifying language to compare many differ...
Experimental quantification of electrostatics in X-H⋅⋅⋅π hydrogen bonds
Experimental quantification electrostatics X-H⋅ ⋅ ⋅ π hydrogen bonds
2016/5/25
Hydrogen bonds are ubiquitous in chemistry and biology. The physical forces that govern hydrogen-bonding interactions have been heavily debated, with much of the discussion focused on the relative con...
A Solvatochromic Model Calibrates Nitriles' Vibrational Frequencies to Electrostatic Fields
Solvatochromic Model Calibrates Vibrational Frequencies Electrostatic Fields
2016/5/25
Electrostatic interactions provide a primary connection between a protein's three-dimensional structure and its function. Infrared probes are useful because vibrational frequencies of certain chemical...
Direct Measurements of Electric Fields in Weak OH••π Hydrogen Bonds
Direct Measurements Electric Fields Weak OH• • π Hydrogen Bonds
2016/5/25
Hydrogen bonds and aromatic interactions are of widespread importance in chemistry, biology, and materials science. Electrostatics play a fundamental role in these interactions, but the magnitude of t...
Phosphate Vibrations Probe Local Electric Fields and Hydration in Biomolecules
Phosphates Water Phospholipids Spectrophotometry, Infrared Electricity Models, Molecular
2016/5/25
The role of electric fields in important biological processes such as binding and catalysis has been studied almost exclusively by computational methods. Experimental measurements of the local electri...
Temperature Dependence of Electron Transfer to the M-Side Bacteriopheophytin in Rhodobacter capsulatus Reaction Centers
hydrogenation fatty acids stereoselectivity kinetics
2016/5/25
Subpicosecond time-resolved absorption measurements at 77 K on two reaction center (RC) mutants of Rhodobacter capsulatus are reported. In the D(LL) mutant the D helix of the M subunit has been substi...
Measurement of Solvation Responses at Multiple Sites in a Globular Protein
background electrolyte capillary electrophoresis humic acid
2016/5/24
Proteins respond to electrostatic perturbations through complex reorganizations of their charged and polar groups, as well as those of the surrounding media. These solvation responses occur both in th...
Charge Delocalization in the Special-Pair Radical Cation of Mutant Reaction Centers of Rhodobacter Sphaeroides from Stark Spectra and Nonadiabatic Spectral Simulations
Rhodobacter sphaeroides Cations Spectrophotometry Spectroscopy, Fourier Transform Infrared Mutagenesis,Site-Directed Absorption Dimerization Oxidation-Reduction Mutation Electrochemistry
2016/5/24
Stark and absorption spectra for the hole-transfer band of the bacteriochlorophyll special pair in the wild-type and L131LH, M160LH, and L131LH/M160LH mutants of the bacterial reaction center of Rhodo...
Controlling Two-Dimensional Tethered Vesicle Motion Using an Electric Field:Interplay of Electrophoresis and Electro-Osmosis
Electric field effects Electrophoresis Electroosmosis DNA Lipids Dynamic response
2016/5/24
We recently introduced methods to tether phospholipid vesicles or proteoliposomes onto a fluid-supported lipid bilayer using DNA hybridization (Yoshina-Ishii, C.; Miller, G. P.; Kraft, M. L.; Kool, E....
A Theory of Intervalence Band Stark Effects
urea aggregation temperature effect orientational distribution
2016/5/24
The response of an intervalence band to an applied electric field, called an intervalence band Stark effect, is considered in detail. Because the application of an electric field to a symmetric mixed-...