Results 21 to 30 of about 2,195,854 (291)

Determination of Microgram Amounts of Copper in Real Samples Using New Modified Carbon Paste Electrode

International Journal of Electrochemical Science, 2015
A new chemically modified carbon paste electrode (CMCPE) based on copper-Cefazoline, Cu(II)-CFZ, ion-associate has been developed. The electrode exhibits a Nernstian slope of 29.44 mV per decade for Cu(II) ion over a concentration range of 4.01x10-6-7 ...
Ahmed Fahmy A. Youssef, Yousry M. Issa, Ola R. Shehab, Heba Sherief   +3 more
doaj   +1 more source

Chemically modified electrodes for electrocatalysis

Philosophical Transactions of the Royal Society of London. Series A, Mathematical and Physical Sciences, 1981
Abstract At a modified electrode, electrocatalysis is accomplished by an immobilized redox substance acting as an electron transfer mediator between the electrode and a reaction substrate. Such mediated electrocatalysis is possible with monomolecular and multimolecular layers of the redox substance. The electron transfer mediation can
openaire   +2 more sources

Voltammetric determination of serotonin in human blood using a chemically modified electrode

, 2014
A Nafion(R)/ruthenium-oxide pyrochlore chemically modified electrode (CME) was used for the determination of serotonin in human blood by square-wave voltammetry.
Chen, I.L., Shih, Y., Zen, J.M., 曾志明   +3 more
core   +1 more source

Electrochemical Sensor for Simultaneous Determination of Theophylline and Caffeine Based on a Novel poly(folic acid)/graphene Composite Film Modified Electrode

International Journal of Electrochemical Science, 2017
In this work, a novel poly(folic acid)/ graphene composite film modified electrode was developed to construct an electrochemical sensor for simultaneous determination of theophylline (TP) and caffeine (CAF).
Xiaoli Shu, Feng Bian, Qianqian Wang, Xiaofei Qin, Yan Wang   +4 more
doaj   +1 more source

Evaluating the antioxidant activity of different species using a novel reagentless chronopotentiometric method

Electrochemistry Communications, 2022
Antioxidants are substances that even in low concentrations can delay or prevent unwanted oxidizing processes. In this way, they can prevent or treat certain diseases in a physiological environment.
Lawrence Kinyua Muthuri, Livia Nagy, Géza Nagy   +2 more
doaj   +1 more source

Electrochemical Behavior of Epinephrine at a Glassy Carbon Electrode Modified by Electrodeposited Films of Caffeic Acid

Sensors, 2006
A stable electroactive thin film of poly(caffeic acid) has been deposited on thesurface of a glassy carbon electrode by potentiostatic technique in an aqueous solutioncontaining caffeic acid.
Nian Bing Li, Hong Qun Luo, Wang Ren
doaj   +1 more source

A Highly Sensitive Mercury(II) Sensor Using Zn/Al Layered Double Hydroxide-3(4-hydroxyphenyl)propionate Modified Multi-Walled Carbon Nanotube Paste Electrode

International Journal of Electrochemical Science, 2015
A multi-walled carbon nanotube (MWCNT) modified with zinc/aluminium layered double hydroxide-3(4-hydroxyphenyl) propionate nanocomposite (Zn/Al-LDH-HPP) was employed to prepare a chemically modified carbon nanotube paste electrode (CMCNTPE) for Hg(II ...
Illyas Md Isa, Mariah Rihan Fasyir, Norhayati Hashim, Sulaiman Ab Ghani, Suriani Abu Bakar, Azmi Mohamed, Azlan Kamari   +6 more
doaj   +1 more source

An electrochemical sensor based on copper nanowires-PDDA modified glassy carbon electrode for amperometric detection of cysteine in alkaline medium

Results in Chemistry, 2022
The development of highly efficient and stable electrocatalysts for their application in electrochemical detection is desirable. Herein, a new copper nanowires (CuNWs) modified electrode was fabricated by coating poly(dimethyl diallyl ammonium chloride) (
Zhixing Zeng, Jianyu Qiao, Cong Tang, Shijun Shao   +3 more
doaj   +1 more source

Beta1 subunits enable fentanyl‐induced BK channel activation and opioid regulation of cerebral artery diameter

FEBS Open Bio, EarlyView.
During the current opioid crisis, the majority of overdose deaths are attributed to ultra‐potent synthetic opioids, such as fentanyl. While fentanyl exerts its action via opioid receptors, we propose that potassium channels in the brain blood vessels may also sense fentanyl.
Shiwani Thapa, Mohammed Nooh, Akhil Geddati, Alex Dopico, Anna N. Bukiya   +4 more
wiley   +1 more source

Characterization of the key membrane protein cytochrome Cyc2 from Ghiorsea bivora

FEBS Open Bio, EarlyView.
This study reports the first detailed biochemical analysis of Cyc2TAG1_1, a cytochrome protein involved in microbial iron oxidation. We produced and purified this enzyme in E. coli, then measured its iron‐oxidizing efficiency, and characterized its electrical and structural properties.
Josiane Azizi, Alain Dolla, Frauke Baymann, Celine Rommevaux, Latifa Elantak, Helene Gaussier, Matthieu Nouailler   +6 more
wiley   +1 more source