Showing papers in "Bioelectrochemistry in 2006"

TL;DR: The direct electron transfer of glucose oxidase (GOD) was achieved based on the immobilization of GOD/colloidal gold nanoparticles on a glassy carbon electrode by a Nafion film and the resulting modified electrode can be used as a biosensor for detecting glucose.

TL;DR: The good correlation of measurements expressed as Trolox equivalent was obtained between the proposed amperometric method and classic spectroscopic method and the developed method was applied for the evaluation of antioxidant activity of some water or ethanol soluble pure compounds of antioxidants.

TL;DR: The dynamic range for determination of glucose is extended to more than two orders of magnitude and the method is straightforward and nondestructive.

TL;DR: Evidence is provided that integrin-dependent molecular mechanisms are involved in 3D cell adhesion and orientation in bone marrow-derived mesenchymal stem cells and fibroblasts and rat MSCs in a reconstituted 3D collagen-based scaffold.

TL;DR: The w-BOD cathode can be stored, therefore, in deoxygenated serum, which contains urate, and can be avoided either by applying a potential that is reducing relative to the O2/H2O half-cell potential, or by excluding O2 and adding a mildly reducing reagent, such as urate.

TL;DR: The electrochemical characterization of polymethylferrocenyl dendrimers deposited onto a platinum electrode and their applications as hydrogen peroxide and glucose sensor and interferences and reproducibility on the response of the sensors were investigated.

TL;DR: This method was successfully applied with high precision and accuracy compared with spectroscopic methods (relative error < 6%) for estimation of the total MTZ drug content in pharmaceutical dosage forms.

TL;DR: Exposure to the aqueous solubilized ionic liquid components, butyl-, hexyl-, and octyl-imidazolium cations and hexafluorophosphate, tetrafluoroborate, and bis(trifluoromethylsulfonyl)imide anions, resulted in partial electrochemical signal loss.

TL;DR: By vapor deposition method, both hemoglobin and colloidal silver nanoparticles were entrapped in a titania sol-gel matrix on the surface of a glassy carbon electrode (GCE), and direct fast electron transfer between Hb and the GCE was achieved, and a pair of well-defined, quasi-reversible redox peaks was observed.

TL;DR: The result obtained was a very low detection limit compared to other common voltammetry methods, and the relative standard deviation at the dopamine concentration of SW anodic 0.05 microg L(-1) was 0.02% (n=15) at the optimum conditions.

TL;DR: A reagentless lactate biosensor is described, based on an electropolymerized copolymer film poly(5-hydroxy-1,4-naphthoquinone-co-5-Hydroxy-3-acetic acid-1-4- naphthOquinone) that can act as an immobilized mediator for the enzyme recycling, at a working potential much lower than those commonly reported in the literature for other mediators.

TL;DR: Enzyme electrodes of polyphenol oxidase were used to determine the amount of phenolic compounds in two brands of Turkish red wines and found very useful owing to their high kinetic parameters and wide pH working range.

TL;DR: The results indicate that ascorbic acid degradation can be described successfully by a first order model during both conventional and ohmic heating, and shows that at a given power level, higher electric field strengths are conducive to increased incidence of faradaic reactions.

TL;DR: Compared to the corresponding results obtained from the MWNTs modified electrode that ADTZ was directly sediment (adsorbed) on it, the sensitivity of this electrode had been improved by two orders of magnitude, which could provide some important data to further research.

TL;DR: A L-cysteine (L-Cys) self-assembled modified gold electrode was used to detect dopamine (DA) by chronoamperometric method (CE) in the presence of ascorbic acid (AA) with satisfied result.

TL;DR: Kinetics of the surface redox reactions of adriamycin adsorbed on paraffin-impregnated graphite electrode (PIGE) and on mercury electrode is measured by square-wave voltammetry.

TL;DR: The data on the intrinsic fluorescence have shown that the dendrimers changed acetylcholinesterase conformation and the strongest effect was induced by PAMAM G3.1.5 d endrimer.

TL;DR: An immunosensor interface based on mixed hydrophobic self-assembled monolayers (SAMs) of methyl and carboxylic acid terminated thiols with covalently attached human Immunoglobulin G (hIgG), is investigated and it is clearly demonstrated that nonspecific adsorption is totally inhibited.

TL;DR: It is confirmed that the signal increase in square wave voltammetry is unambiguously due to hybridization.

TL;DR: The results indicate that title compounds could be interesting as potential antitumoral chemotherapeutics and hydrogen-bonding intermolecular interactions were observed which may differentiate their biological features.

TL;DR: The remarkable peak current enhancement indicates that the AB-DHP modified GCE has great potential in the sensitive determination of colchicine.

TL;DR: It is demonstrated that, although AA is excluded at the NA coating, a catalytic regeneration of DA, induced by AA, occurs at the interface NA film/electrolyte resulting from the diffusion of the o-quinone product of DA oxidation from the electrode surface to that interface.

TL;DR: A limited number of averaged parameters are defined in order to describe the equilibria between cell membrane components and environmental components, which are the total acidic functional group concentration as well as the basic group concentration and their association constants with hydrogen or hydroxyl ions.

TL;DR: Carbon paste electrodes modified with baker's yeast Saccharomyces cerevisiae were investigated as amperometric biosensors for lactic acid and found that a linear range in the dependence of the current responses on the concentration of lactic Acid was up to 1 mM.

TL;DR: Various experimental parameters such as solution pH value, the amount of MWNT, accumulation conditions and scan rate were optimized for the determination of procaine, and a new method with detection limit of 2 x 10(-7) mol/L was developed for procaine determination.

TL;DR: The transport lattice approach provides modular, multiscale modeling capability that here ranges from cell membranes (5 nm scale) to the cell confinement volume ( approximately 40 microm scale).

TL;DR: It was shown that generation of action potential (AP) temporally eliminates alkaline bands, suppresses O(2) evolution, and differentially affects primary reactions of photosystem II (PSII) in different cell regions.

TL;DR: A new micro pulsed radio-frequency electroporation cell (microPREP) chip was fabricated using a lift-off technique and SU-8 photolithography and a pulsed RF electric field was applied to the microchip.

TL;DR: The interaction of ethidium bromide with calf thymus DNA is investigated electrochemically with the use of differential pulse voltammetry (DPV) at two different ionic strengths of a solution and it is revealed that EtBr binds with DNA in more than one way--intercalative and electrostatic at low ionic strength, and semi-intercalation and electro static at a higher strength of the solution.

TL;DR: The modification of a graphite-epoxy composite electrode (GECE) with bacterial cells along with an analytical application are presented and sample signals were found to be very similar with the standard solutions having the same concentration.