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Electrochemical Techniques (7):
Recent article
Electrochemical Techniques
Biomedical Materials (6)5 2011
Abstract
Gelatin-based nanofibrous scaffolds with a mean fiber diameter of 300 nm were prepared with and without micrometer-sized polyethylene glycol (PEG) fibers that served as sacrificial templates. Upon fabrication of the scaffolds via electrospinning, the gelatin fibers were crosslinked w...
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PMID: 21931195
PDF is available here.
PDF is available here.
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Abstract
We cover the principal developments since the original development of the S-K method....
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PMID: 21819856
PDF is available here.
PDF is available here.
Abstract
A sensitive enzymeless organophosphate pesticides (OPs) sensor is fabricated by using Au nanoparticles (AuNPs) decorated graphene nanosheets (GNs) modified glassy carbon electrode as solid phase extraction (SPE). Such a nanostructured composite film, combining the advantages of AuNPs...
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PMID: 21807193
PDF is available here.
PDF is available here.
Abstract
We report here the rational synthesis of a [Mn(3)CaO(4)](6+) cubane that structurally models the trimanganese-calcium-cubane subsite of the OEC. Structural and electrochemical comparison between Mn(3)CaO(4) and a related Mn(4)O(4) cubane alongside characterization of an intermediate calcium-manganes...
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PMID: 21817047
PDF is available here.
PDF is available here.
Abstract
Novel nanowall arrays of CaCO(3)-chitosan (CaCO(3)-chi) were deposited onto a cathodic substrate by a facile one-step electrodeposition approach. Results demonstrate that chitosan plays an important role in the formation of nanowall arrays. Freestanding well-aligned CaCO(3)-chi nanow...
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PMID: 21674113
PDF is available here.
PDF is available here.
Abstract
The novel conductive polyaniline/bacterial cellulose (PANI/BC) nanocomposite membranes have been synthesized in situ by oxidative polymerization of aniline with ammonium persulfate as an oxidant and BC as a template. The resulting PANI-coated BC nanofibrils formed a uniform and flexible membrane. It...
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PMID: 21671578
PDF is available here.
PDF is available here.
Abstract
Abstract
We report the catalytic anthraquinone-mediated reduction of oxygen at a boron-doped diamond electrode. Scheme of squares modelling confirms the existence of and reveals the role of the semiquinone intermediates, which are shown to have an exceptional reactivity towards oxygen (as compared to the di-r...
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PMID: 21506239
PDF is available here.
PDF is available here.
Abstract
With the ability to form a nano-sized fibrous structure with large pore sizes mimicking the extracellular matrix (ECM), electrospinning was used to fabricate chitosan/poly(vinyl alcohol) nanofibers reinforced by single-walled carbon nanotube (SWNT-CS/PVA) for potential use in neural...
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PMID: 21702365
PDF is available here.
PDF is available here.
Abstract
This article describes a systematic study of the galvanic replacement reaction between PtCl(6)(2-) ions and Pd nanocrystals with different shapes, including cubes, cuboctahedrons, and octahedrons. It was found that Br(-) ions played an important role in initiating, facilitating, and directing the rep...
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PMID: 21438596
PDF is available here.
PDF is available here.
Abstract
We found this method to be both simple and useful for the simultaneous determination of lathosterol and cholesterol in serum.
Copyright © 2011. Published by Elsevier B.V....
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PMID: 21398191
PDF is available here.
PDF is available here.
Abstract
We present here a new class of electrochemical probes based on gold surface-coated epimeric monosaccharide-quinone hybrids toward the ingenious detection of specific epimeric carbohydrate-protein interactions. Glucose and galactose, which represent a pair of natural monosaccharide C4 epimers, were u...
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PMID: 21341799
PDF is available here.
PDF is available here.
Abstract
We introduce a biosynthetic system that permits studies of both channel activity in single cells and electrical conduction in multicellular networks. We convert unexcitable somatic cells into an autonomous source of electrically excitable and conducting cells by stably expressing only three membrane...
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PMID: 21556054
PDF is available here.
PDF is available here.
Abstract
A gold/sodium dodecylbenzene sulfonate nanoparticles modified glassy carbon electrode (nano-Au/SDBS/GCE) was electrochemically fabricated with a constant potential at -0.4V. The obtained nano-Au/SDBS/GCE was characterized with scanning electronic microscopy, X-ray photoelectron spectroscopy and elec...
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PMID: 20832258
PDF is available here.
PDF is available here.
Abstract
Incorporation of gene into electrospun nanofibers for localized gene transfection of target cells represents a robust platform for tissue regeneration. In this study, a new two-step approach was explored to immobilize DNA onto electrospun nanofibers for effective gene delivery, that...
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PMID: 21105170
PDF is available here.
PDF is available here.
Abstract
Biomaterial bridges constructed from electrospun fibers offer a promising alternative to traditional nerve tissue regeneration substrates. Aligned and unaligned polycaprolactone (PCL) electrospun fibers were prepared and functionalized with the extracellular matrix proteins collagen...
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PMID: 21219036
PDF is available here.
PDF is available here.
Abstract
These results indicated that an acid autocatalytic effect still existed in the hydrolysis of PLGA nanofibrous matrix. The presence of lysozyme could only accelerate the dissolution of degradation products with low molecular weight, but have no contribution to the chain scission.
© 2...
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PMID: 20725988
PDF is available here.
PDF is available here.
Lab On a Chip (10)22 2010
Abstract
The combination of simple Electrochemical Micro-Paper-based Analytical Devices (EµPADs) with commercially available glucometers allows rapid, quantitative electrochemical analysis of a number of compounds relevant to human health (e.g., glucose, cholesterol, lactate, and alcohol) in blood or urine....
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PMID: 20927458
PDF is available here.
PDF is available here.
Biomedical Chromatography (24)12 2010
Abstract
Many psychotropic substances are illegally available on the streets and/or via the Internet. This wide distribution has become a serious social problem. To control this problem, many substances have been controlled as 'designated substances' (Shitei-Yakubutsu) in Japan since April 2007 by the Pharma...
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PMID: 21077248
PDF is available here.
PDF is available here.
Abstract
Abstract
This paper presents a comprehensive performance study of polylactic acid (PLA) biocomposites, obtained by solvent casting, containing a novel silver-based antimicrobial layered silicate additive for use in active food packaging applications. The silver-based nanoclay showed strong antimicrobial acti...
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PMID: 20711905
PDF is available here.
PDF is available here.
Abstract
A series of model complexes [(μ-pdt)Fe(2)(CO)(5)](2)M(sip)(2) (M = Fe, Ni) were synthesized as H-cluster analogues of [FeFe]-hydrogenase. Their electrochemical behaviours were investigated and it is proposed that the bridging metal bis(tris-chelate) groups act as electron transfer sites in theses m...
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PMID: 20830399
PDF is available here.
PDF is available here.
Abstract
The iron(iii) complexes of the bis(phenolate) ligands 1,4-bis(2-hydroxy-4-methyl-benzyl)-1,4-diazepane H(2)(L1), 1,4-bis(2-hydroxy-4-nitrobenzyl)-1,4-diazepane H(2)(L2), 1,4-bis(2-hydroxy-3,5-dimethylbenzyl)-1,4-diazepane H(2)(L3) and 1,4-bis(2-hydroxy-3,5-di-tert-butylbenzyl)-1,4-diazepane H(2)(L4)...
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PMID: 20835480
PDF is available here.
PDF is available here.
Abstract
The chemical reaction of Pt(II)(L(1))Cl(2) [L(1) = N-4-tolylpyridine-2-aldimine] with a bidentate N,S-donor atom ligand, 2-methylthioaniline, (HL(2)) in alkaline methanolic medium yielded a mixed ligand donor-acceptor complex, [Pt(II)(L(1))(L(2))]Cl, [1]Cl. The complex has been characterized by diff...
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PMID: 20733997
PDF is available here.
PDF is available here.
Macromolecular Bioscience (10)10 2010
Abstract
For the reconstruction of functional tissue, biodegradable scaffolds providing specific surface functionality and a three-dimensional structure matching that of the damaged tissue are needed. Fibers capable of controlling cell-fiber interaction were produced by electrospinning of PDL...
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PMID: 20572276
PDF is available here.
PDF is available here.
Bioresource Technology (101)19 2010
Abstract
For the sensitive determination of Pb(II) from aqueous solutions, a new voltammetric biosensor based on carbon paste electrode modified with Rhizopus arrhizus was developed. The preconcentrated ions at open circuit were reduced by using differential pulse stripping voltammetry techni...
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PMID: 20576569
PDF is available here.
PDF is available here.
Abstract
A string-like carbon fiber was found to be very suitable as a working electrode material for direct electrochemical oxidation of β-nicotinamide adenine dinucleotide reduced form (NADH), and direct use of it for an enzyme reactor was possible. The electrochemical NAD+ recycling system was applied to...
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PMID: 20834161
PDF is available here.
PDF is available here.
Chemical Communications (46)34 2010
Abstract
The interactions of the metal ions Mg(2+), Zn(2+), Ni(2+), and Co(2+) with thin films of peptide nucleic acids (PNAs) were studied by electrochemical impedance spectroscopy (EIS), and the results show that Zn(2+), Ni(2+) and Co(2+) interacted favorably with the PNA film involving the backbone and th...
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PMID: 20680217
PDF is available here.
PDF is available here.
Abstract
A bromo tricarbonyl rhenium(I) complex with a thiophene-functionalized bis(pyrazolyl) pyridine ligand (L), ReBr(L)(CO)(3) (1), has been synthesized and characterized by variable temperature and COSY 2-D (1)H NMR spectroscopy, single-crystal X-ray diffraction, and photophysical methods. Complex 1 is...
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PMID: 20652183
PDF is available here.
PDF is available here.
Abstract
The synthesis and Zn(2+) coordination properties of a new macrocycle (L1) obtained by dipodal (2 + 2) condensation of the polyamine 3-(naphthalen-2-ylmethyl)pentane-1,5-diamine with 1H-pyrazole-3,5-dicarbaldehyde are reported. pH-metric studies show that L1 bears five measurable protonation steps in...
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PMID: 20661509
PDF is available here.
PDF is available here.
Abstract
A chiral, biocompatible, conducting material comprising collagen I, silica gel and ferrocene was found to modify and invert, the chiral selectivity of D-glucose oxidase and L-lactate oxidase. This result may have implications as collagen matrices are widely used in drug delivery, biosensing and tiss...
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PMID: 20664851
PDF is available here.
PDF is available here.
Abstract
Nanofiber manufacturing is one of the key advancements in nanotechnology today. Over the past few years, there has been a tremendous growth of research activities to explore electrospinning for nanofiber formation from a rich variety of materials. This quite simple and cost effective...
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PMID: 21133179
PDF is available here.
PDF is available here.
Abstract
We show that stacked graphene nanofibers (SGNFs) demonstrate superior electrochemical performance for oxidation of DNA bases over carbon nanotubes (CNTs). This is due to an exceptionally high number of accessible graphene sheet edges on the surface of the nanofibers when compared to carbon nanotubes...
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PMID: 20532301
PDF is available here.
PDF is available here.
Abstract
Pulsed voltammetry has been used to study formic acid oxidation on platinum stepped surfaces to determine the kinetics of the reaction and the role of the surface structure in the reactivity. From the current transients at different potentials, the intrinsic activity of the electrode through the act...
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PMID: 20539876
PDF is available here.
PDF is available here.
Chemical Communications (46)31 2010
Abstract
The chronocoulometric detection of DNA was carried out based on circular strand-replacement DNA polymerization on a screen-printed electrode, and extended to quantify tumor cells with the aid of aptamer recognition.
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PMID: 20585665
PDF is available here.
PDF is available here.
Chemical Communications (46)31 2010
Abstract
A one-step homogeneous colorimetric immunoassay format coupled with zeta potential measurements for determination of specific diabetic biomarker glycated hemoglobin (HbA1c) using functionalised gold nanoparticles as bioprobes is reported. The assay exhibited an excellent sensitivity based on absorba...
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PMID: 20571696
PDF is available here.
PDF is available here.
Journal of Endodontics (36)8 2010
Abstract
The LCF life of a NiTi instrument rotating with a curvature in a corrosive environment is enhanced by electropolishing. The design, both cross-sectional and longitudinal, appears to have an effect on the fatigue behavior of NiTi rotary instruments.
Copyright 2010 American Association of Endodontis...
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PMID: 20647095
PDF is available here.
PDF is available here.
Abstract
Numerous disinfection products are widely used in daily life to kill pathogenic microorganisms. However, most disinfectants are organic compounds that might be hazardous to the environment and humans when used excessively. Phenolic disinfectants in disinfection products are investigated using a high...
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PMID: 20819284
PDF is available here.
PDF is available here.
Analyst (Cambridge UK) (135)8 2010
Abstract
Thin silicate films with immobilised enzymes catalysing dioxygen reduction, i.e. laccase and bilirubin oxidase (BOD), were deposited on glass and poly(methyl 2-methylpropenoate) (Plexiglas) surfaces in a sol-gel process by sol drop evaporation. Scanning electrochemical microscopy (SECM) images and a...
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PMID: 20532339
PDF is available here.
PDF is available here.
Abstract
Recently, use of electrochemistry and combination of this method with spectroscopic and other analytical techniques are getting one of the important approaches in drug discovery and research as well as quality control, drug stability, determination of physiological activity, measurement of neurotran...
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PMID: 20402642
PDF is available here.
PDF is available here.
Abstract
Water reduction can be electrochemically promoted by zinc under very mild conditions, as demonstrated by the formation of the complex [Zn(H(2)O)(6)][Zn(3)(L)(3)(mu(3)-O)], whose anion consists of a Zn(3)O(4) cluster incorporating a mu(3)-oxo anion.
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PMID: 20532273
PDF is available here.
PDF is available here.
Chemical Communications (46)28 2010
Abstract
Efficient electrochemiluminescence (ECL) quenching was achieved by functionalized CdTe quantum dots (QDs) through ECL energy scavenging, based on which ultrasensitive antigen detection could be realized.
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PMID: 20559593
PDF is available here.
PDF is available here.
Abstract
A simple and precise square-wave adsorptive cathodic stripping voltammetry (SW-AdCSV) method has been described for simultaneous determination of Mn(II), Cu(II) and Fe(III) in water samples using a carbon paste electrode. In 0.1 mol L(-1) acetate buffer (pH 5) containing 50 micromol L(-1) of 2-(5'-b...
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PMID: 20602949
PDF is available here.
PDF is available here.
Abstract
Photoinduced electron transfer (ET) of a series of aromatic electron donors (D) to the singlet or triplet excited state of a flavin analogue (10-methylisoalloxazine: MeFl) and intermolecular back electron transfer (BET) from MeFl(*-) to D(*+) in benzonitrile (PhCN) has been investiga...
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PMID: 20496351
PDF is available here.
PDF is available here.
Abstract
The oxidation of adenine in phosphate buffer solution is investigated using square-wave voltammetry and in situ UV spectroelectrochemistry. The geometry of adenine and the derivatives optimized at DFTB3LYP-6-31G (d, p)-PCM level is in agreement with the crystal structure, and the imitated UV spectra...
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PMID: 20591423
PDF is available here.
PDF is available here.
Abstract
A highly sensitive and selective photoelectrochemical sensor for Cu(2+) was developed based on the selective interaction between CdS quantum dots (QDs) immobilized on an indium tin oxide (ITO) electrode surface and Cu(2+) in a triethanolamine (TEA) solution to form Cu(x)S-doped CdS QDs, which disrup...
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PMID: 20648335
PDF is available here.
PDF is available here.
Abstract
Quantum dot-sensitized solar cells based on Zn-doped TiO(2) (Zn-TiO(2)) film photoanode and polysulfide electrolyte were fabricated. Zn-TiO(2) nanoparticles were obtained via a hydrothermal method and screen printed on the fluorine-doped tin oxide glass to prepare the photoanode. The structure, morp...
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PMID: 20648354
PDF is available here.
PDF is available here.
Abstract
A novel supramolecular amperometric immunosensor for the determination of Human Immunodeficiency Virus antigen p24 (HIV p24) was built up using the electrostatic layer-by-layer self-assembly technique upon a gold electrode with HIV p24 antibody (anti-p24) being immobilized on polyelectrolyte/gold na...
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PMID: 20657408
PDF is available here.
PDF is available here.
Abstract
A non-enzymatic amperometric glucose biosensor based on the modification of functional nickel hexacyanoferrate nanoparticles was prepared via electrochemical deposition. The electrochemical deposition of the nickel hexacyanoferrate nanoparticles was obtained by potential cycling in a solution contai...
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PMID: 20409695
PDF is available here.
PDF is available here.
Advanced Materials (FRG) (22)25 2010
Abstract
Advanced Materials (FRG) (22)25 2010
Abstract
Advanced Materials (FRG) (22)25 2010
Abstract
Advanced Materials (FRG) (22)25 2010
Abstract
Advanced Materials (FRG) (22)25 2010
Abstract
Advanced Materials (FRG) (22)25 2010
Abstract
Nanotechnology (21)25 2010
Abstract
Solution based synthesis routes are attractive for making tailor-made nanostructures for electroceramics in a simple and cost-effective way. The gas sensing characteristics of semiconducting oxide gas sensors strongly depend on the adsorption and desorption of gases over the sensing surface. The mor...
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PMID: 20516584
PDF is available here.
PDF is available here.
Abstract
We investigated a MFC with a denitrifying biocathode for perchlorate reduction and utilized the system to identify putative biocathode-utilizing perchlorate-reducing bacteria (PCRB). Perchlorate reduction in the MFC was established by increasing the perchlorate loading to the biocathode, while decre...
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PMID: 20476736
PDF is available here.
PDF is available here.
Neurochemical Research (35)6 2010
Abstract
Chemical mechanisms of antioxidant and electron donating function of the hypothalamic proline-rich polypeptides have been clarified on the molecular level. The antioxidant-chelating property of Galarmin and Gx-NH(2) was established by their capability to inhibit copper(II) dichloride catalyzed H(2)O...
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PMID: 20440556
PDF is available here.
PDF is available here.
Abstract
Osteoblasts from distinct functional subgroups were retested using CDS, allowing their classification into the same functional subgroups with both ligands as initially demonstrated using a cAMP assay. Clinical data obtained with CDS and PBMCs showed 100% specificity and 100% sensitivity because mela...
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PMID: 20461030
PDF is available here.
PDF is available here.
Abstract
We report a three-dimensional nanoscale liquid glass electrode made from monolithic substrates without conductive materials by femtosecond-laser nanomachining. The electrode consists of a nanochannel terminating at a nanoscale glass tip that becomes a conductor in the presence of high electric field...
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PMID: 20473300
PDF is available here.
PDF is available here.