Results 51 to 60 of about 4,821 (159)

Galvanostatic Entrapment of Penicillinase into Polytyramine Films and its Utilization for the Potentiometric Determination of Penicillin

Sensors, 2010
A sensitive and reliable potentiometric biosensor for determination of penicillin has been developed by exploiting the self-limiting growth of the non-conducting polymer, polytyramine.
Fatma Ismail, Samuel B. Adeloju
doaj   +1 more source

A Redox‐Buffering System for Stabilizing the Lattice Oxygen Mechanism in CeO2/FeOOH Heterostructure Electrocatalysts for Highly Stable Anion Exchange Membrane Water Electrolyzers

ENERGY &ENVIRONMENTAL MATERIALS, Volume 9, Issue 2, March 2026.
The CeO2/FeOOH heterostructure catalyst was synthesized via a facile co‐precipitation strategy. The work‐function disparity between CeO2 and FeOOH drives interfacial electron redistribution, thereby optimizing the OER pathway. Moreover, the interfacial Ce3+/Ce4+ couple establishes a “redox‐buffering system” that suppresses Fe dissolution and enhances ...
Daehyun Kim, Seunghwan Jo, Jeong In Jeon, Jung Inn Sohn, John Hong   +4 more
wiley   +1 more source

Manganese(III) Porphyrin-based Potentiometric Sensors for Diclofenac Assay in Pharmaceutical Preparations

Sensors, 2010
Two manganese(III) porphyrins: manganese(III) tetraphenylporphyrin chloride and manganese(III)-tetrakis(3-hydroxyphenyl)porphyrin chloride were tested as ionophores for the construction of new diclofenac−selective electrodes.
Eugenia Fagadar-Cosma, Vlad Chiriac, Elena Maria Pica, Luminita Nica, Liviu Calin Bolundut, Vasile Ostafe, Stela Pruneanu, Florina Pogacean, Liliana Olenic, Dana Vlascici   +9 more
doaj   +1 more source

Chemistry Composition and Bioaccessibility Study of Phenolic Compounds and Carotenoids of New Brazilian Biofortified Sweet Potato “CIP BRS Nuti”

Food Chemistry International, Volume 2, Issue 1, Page 23-33, March 2026.
Phenolic compounds of sweet potato CIP BRS Nuti were evaluated for the first time. Catechin, epicatechin, and procyanidin B1 exhibited high bioaccessibility. ABSTRACT Sweet potatoes biofortified in carotenoids have been an alternative to combat malnutrition in vulnerable populations. This work is the first comprehensive study of the bioactive potential
Maria Carla Cândido da Silva, Larissa Iris da Silva Monteiro, Darlanna de Souza Prado, Ana Júlia de Brito Araújo Carvalho, Marciane Magnani, Alexandre Furtado Silveira Mello, Erbs Cintra de Souza Gomes, Marcos dos Santos Lima   +7 more
wiley   +1 more source

potentiometry

Citation: 'potentiometry' in the IUPAC Compendium of Chemical Terminology, 5th ed.; International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.09127 • License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International for individual terms ...
  +4 more sources

THERMODYNAMICS OF COMPLEX FORMATION OF COPPER (II) WITH ISONICOTINAMIDE AND ACID-BASIC EQUILIBRIUM OF LIGAND IN WATER-ORGANIC SOLUTIONS

Физико-химические аспекты изучения кластеров, наноструктур и наноматериалов, 2019
The stability constants of copper complexes with isonicotinamide and the ligand protonation constants in a range of compositions of a water-ethanol solvent of 0.0 – 0.7 molar fractions of ethanol at 298.2 K and an ionic strength of the medium 0.25 ...
N.A. Chesnokova, A.S. Gushchina, N.N. Kuranova   +2 more
doaj   +1 more source

Interactions Between Dissolved Organic Carbon and Aluminium Activity in Tropical and Temperate No‐Till Agroecosystems

Journal of Sustainable Agriculture and Environment, Volume 5, Issue 1, March 2026.
Conceptual model of depth‐stratified soil acidification under long‐term no‐till in temperate (Washington, USA) and tropical (Brazilian Oxisol) systems. Nitrogen inputs promote surface acidification (↓pH) and increased Al3+ activity, while lime or silicate amendments modify base cation dynamics. Increased DOC–Al complexation reduces free Al3+ and alters
Joao A. Antonangelo, Richard T. Koenig
wiley   +1 more source

Effect of Ce/La Substitution on Optical Transparency and Ionic Conductivity of Sodium Silicate Glasses

Journal of the American Ceramic Society, Volume 109, Issue 3, March 2026.
ABSTRACT We investigate sodium silicate glasses modified with Ce2O3 and La2O3 to explore the interplay between optical absorption, structure, and macroscopic properties. Ce doping drives a pronounced red‐shift of the absorption edge into the visible region (> 500 nm), arising from O2− →$ \to $ Ce4+ charge‐transfer and intervalence transitions ...
Minghui Sun, Alexis Duval, Jiangkun Cao, Lothar Wondraczek   +3 more
wiley   +1 more source

Early acclimatization to high altitude: Acid–base and fluid balance dynamics during the first 2 days at 3100 m

Experimental Physiology, Volume 111, Issue 3, Page 1387-1396, 1 March 2026.
Abstract Immediate responses to hypoxia at high altitude are hyperventilation and successive respiratory alkalosis. Alkalosis, in turn, can affect cerebrospinal fluid pH and ventilatory control. The kidneys compensate metabolically for respiratory alkalosis.
Elisabeth Skalla, Benedikt Treml, Sasa Rajsic, Michael Schreinlechner, Zoran Bukumirić, Klaus Berek, Alexander Egger, Johann Knotzer, Martin Burtscher, Axel Kleinsasser   +9 more
wiley   +1 more source

Honey Evaluation Using Electronic Tongues: An Overview

Chemosensors, 2018
Honey-rich composition in biologically active compounds makes honey a food products highly appreciated due to the nutritional and healthy properties. Food-manufacturing is very prone to different types of adulterations and fraudulent labelling making it ...
Ana C. A. Veloso, Mara E. B. C. Sousa, Leticia Estevinho, Luís G. Dias, António M. Peres   +4 more
doaj   +1 more source