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Showing 1-30 of 33 results for "335061" within Papers
Anahita Karimi et al.
ACS applied materials & interfaces, 11(27), 24725-24734 (2019-06-14)
Quantification of chemical reactions of nanoparticles (NPs) and their interaction with contaminants is a fundamental need to the understanding of chemical reactivity and surface chemistry of NPs released into the environment. Herein, we propose a novel strategy employing single-particle electrochemistry
Anthony P O'Mullane et al.
Analytical chemistry, 80(12), 4614-4626 (2008-05-20)
An analytical evaluation of the higher ac harmonic components derived from large amplitude Fourier transformed voltammetry is provided for the reversible oxidation of ferrocenemethanol (FcMeOH) and oxidation of uric acid by an EEC mechanism in a pH 7.4 phosphate buffer
Lettie A Smith et al.
Analytical chemistry, 92(2), 2266-2273 (2019-12-14)
We demonstrate the application of open circuit potentiometry (OCP) to measure enzyme turnover kinetics, kturn. The electrode surface will become poised by the addition of a well-behaved redox pair, such as ferrocenemethanol/ferrocenium methanol (FcMeOH/FcMeOH+), which acts as the cosubstrate for
Ning Xia et al.
Analytica chimica acta, 878, 95-101 (2015-05-24)
MicroRNAs (MiRNAs) have been regarded as clinically important biomarkers and drug discovery targets. In this work, we reported a simple and ultrasensitive electrochemical method for miRNAs detection based on single enzyme amplification and electrochemical-chemical-chemical (ECC) redox cycling. Specifically, upon contact
H Yamada et al.
Biochemical and biophysical research communications, 180(3), 1330-1334 (1991-11-14)
Permeability of ferrocene derivatives through a planer bilayer lipid membrane (BLM) was examined by an electrochemical method using microelectrodes. Location of the microelectrode tip inside the unstirred layer enables the detection of electroactive substances permeating the membrane without unstirred layer
Jingyi Wang et al.
Journal of colloid and interface science, 570, 350-361 (2020-03-18)
Molybdenite (MoS2) has attracted great attention in the field of advanced materials. MoS2 is normally separated from other minerals by selective flotation, and chemical reagents (so-called depressants) are required to lower the surface hydrophobicity of MoS2. Previous studies had controversial
Amol V Patil et al.
Nanoscale, 2(5), 734-738 (2010-07-22)
Electrochemical nanoprobes were fabricated from polymer insulated multiwalled carbon nanotube modified tapping mode atomic force microscope probes. An electrochemically active length of carbon nanotube was exposed by laser ablation of the insulating polymer. Characterization of these probes is done by
Effect of the mediator in feedback mode-based SECM interrogation of indium tin-oxide and boron-doped diamond electrodes.
Neufeld A K and O?Mullane A P
Journal of Solid State Electrochemistry, 10(10), 808-816 (2006)
Yadong Xue et al.
Analytical chemistry, 82(17), 7112-7118 (2010-08-06)
A scanning electrochemical microscopic (SECM) method for in situ imaging of four types of membrane glycan motifs on single adherent cells was proposed using BGC-823 human gastric carcinoma (BGC) cells as the model. These adherent cells were first micropatterned in
Ziwei Zhu et al.
Biotechnology journal, 2(2), 241-248 (2007-01-24)
A directed evolution protocol was developed for glucose oxidase (GOx) from Aspergillus niger that mimics applications conditions and employs a well-known mediator, oxidized ferrocenemethanol, in a medium throughput screen (96-well plate format). Upon reduction, oxidized ferrocenemethanol shows a color change
Shuo Kang et al.
Lab on a chip, 12(7), 1262-1267 (2012-03-01)
Nanofluidic thin-layer cells count among the most sensitive electrochemical sensors built to date. Here we study both experimentally and theoretically the factors that limit the response time of these sensors. We find that the key limiting factor is reversible adsorption
Kosuke Ino et al.
Chemical communications (Cambridge, England), 48(68), 8505-8507 (2012-07-20)
This report describes the electrochemical detection of a redox component in droplets using a local redox cycling-based electrochemical (LRC-EC) chip device consisting of 256 sensors. The time-course analyses showed that the redox compound in the droplet was dynamically changed during
Benchaporn Lertanantawong et al.
Analytical chemistry, 80(17), 6515-6525 (2008-08-01)
The ability of the technique of large-amplitude Fourier transformed (FT) ac voltammetry to facilitate the quantitative evaluation of electrode processes involving electron transfer and catalytically coupled chemical reactions has been evaluated. Predictions derived on the basis of detailed simulations imply
Graphene?based optically transparent electrodes for spectroelectrochemistry in the UV?Vis region.
Weber C M, et al.
Small, 6(2), 184-189 (2010)
Dan Shan et al.
Biosensors & bioelectronics, 23(3), 432-437 (2007-08-28)
A novel amperometric glucose sensor based on co-immobilization of ferrocenemethanol (MeOHFc) and glucose oxidase (GOD) in the layered double hydroxides (LDHs) was described. MeOHFc immobilized in LDHs played effectively the role of an electron shuttle and allowed the detection of
James B Sheppard et al.
The Analyst, 142(6), 930-937 (2017-02-22)
The diffusion-controlled transport of ions and molecules through polymer membranes utilized in chemical and biosensors is often the key factor determining the response characteristics of these sensors. In this paper, a simple voltammetric method is described for the determination of
Tomer Noyhouzer et al.
Analytical chemistry, 89(10), 5246-5253 (2017-04-19)
A new type of flow platform for electrochemical and spectroelectrochemical measurements is presented. Finite element method simulations confirm that the hydrodynamic profile within the device is not turbulent and provides an analytical platform for the investigation of homogeneous kinetics, radical
Sabine Kuss et al.
Proceedings of the National Academy of Sciences of the United States of America, 110(23), 9249-9254 (2013-05-21)
The emergence of resistance to multiple unrelated chemotherapeutic drugs impedes the treatment of several cancers. Although the involvement of ATP-binding cassette transporters has long been known, there is no in situ method capable of tracking this transporter-related resistance at the
Noora Tujunen et al.
Materials science & engineering. C, Materials for biological applications, 55, 70-78 (2015-06-29)
Hydrogen peroxide is the product of various enzymatic reactions, and is thus typically utilized as the analyte in biosensors. However, its detection with conventional materials, such as noble metals or glassy carbon, is often hindered by slow kinetics and biofouling
Marcus Maschke et al.
ChemMedChem, 9(6), 1188-1194 (2014-05-20)
We report the synthesis of trifluoromethylated metallocenes (M=Fe, Ru) and related metal-free compounds for comparison of their biological properties with the aim to establish structure-activity relationships toward the anti-proliferative activity of this compound class. All new compounds were comprehensively characterized
Sabine Kuss et al.
Bioelectrochemistry (Amsterdam, Netherlands), 82(1), 29-37 (2011-05-31)
Cancer cell multidrug resistance is a molecular signature that highly influences the outcome of chemotherapy treatment and for which there is currently no robust method to monitor in vitro its activity. Herein, we demonstrate that ferrocenemethanol (FcCH(2)OH) and its oxidized
Peter Palatzky et al.
Electrophoresis, 33(17), 2689-2694 (2012-09-12)
Electrochemically assisted injection (EAI) is an attractive injection concept for CE that enables the separation of neutral analytes via electrochemical generation of charged species during the injection process. A new semiautomated EAI configuration was developed and applied in conjunction with
Zedong Li et al.
The Analyst, 140(16), 5526-5535 (2015-06-17)
The integration of paper with an electrochemical device has attracted growing attention for point-of-care testing, where it is of great importance to fabricate electrodes on paper in a low-cost, easy and versatile way. In this work, we report a simple
Jidong Guo et al.
Analytical chemistry, 81(1), 130-138 (2009-01-02)
Although microdisk electrode arrays (MEAs) have been extensively used for more than three decades, the existing rules do not provide an unambiguous formula for the calculation of the minimum interelectrode distance (d) necessary for steady-state current response. With the aim
Jingyi Wang et al.
Journal of colloid and interface science, 584, 103-113 (2020-10-16)
The anodic dissolution of chalcopyrite (CuFeS2) encounters the problem of surface passivation, which significantly affects the copper extraction efficiency. So far, there is no agreement on the passivation mechanism and composition of passive layer, which could be studied by using
Romina Carballo et al.
Bioelectrochemistry (Amsterdam, Netherlands), 104, 51-57 (2015-04-02)
Poly [Ni-Protoporphyrin] film (pNiPP), containing multiwall carbon nanotubes (MWCNT) was used to cover a glassy carbon electrode. The hybrid material (pNiPP/MWCNT) successfully combines the permselectivity of pNiPP with the high conductivity of MWCNT. The modified electrode was used to perform
Sami Sainio et al.
Molecular neurobiology, 52(2), 859-866 (2015-06-22)
Carbon-based materials, such as diamond-like carbon (DLC), carbon nanofibers (CNFs), and carbon nanotubes (CNTs), are inherently interesting for neurotransmitter detection due to their good biocompatibility, low cost and relatively simple synthesis. In this paper, we report on new carbon-hybrid materials
Paweł Krysiński et al.
Bioelectrochemistry (Amsterdam, Netherlands), 66(1-2), 71-77 (2005-04-19)
We report on the formation of a gold oxide layer and the reaction of this oxide with an acid chloride to form a stable, relatively complete monolayer bound through an ester-like bond to the gold oxide surface. We have used
Convenient methods for the synthesis of ferrocene? carbohydrate conjugates.
Casas-Solvas J M, et al.
Organic Letters, 6(21), 3687-3690 (2004)
Nataraju Bodappa
Analytical methods : advancing methods and applications, 12(27), 3545-3550 (2020-07-17)
Here, we investigated the sealing quality between a microwire disk and the surrounding glass sheath of platinum disk ultramicroelectrodes (UMEs) using outer-sphere (ferrocene methanol, FcMeOH, oxidation) and inner-sphere electrochemical reactions (hydrogen underpotential deposition (HUPD) and the hydrogen evolution reaction (HER))
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