Results 11 to 20 of about 59,532 (299)

Characterization of proteins by means of their buffer capacity, measured with an ISFET-based coulometric sensor-actuator system [PDF]

open access: yes, 1993
Proteins form the specific selector in many biochemical sensors. A change in one of the properties of such a protein has to be detected by an appropriate transducer, which completes the biochemical sensor.
Bergveld, P., Luo, J., Olthuis, W.
core   +8 more sources

Studies on the acid-base properties of the ZnBr2NaBr molten salt system [PDF]

open access: yes, 1993
The acid-base properties of the ZnBr2-NaBr melts at 623 K were investigated on the basis of the electromotive force measurements of a zinc-zinc concentration cell.
Hayashi, Hidetaka   +3 more
core   +1 more source

El razonamiento causal secuencial en los equilibrios ácido-base múltiples : propuestas didácticas en el ámbito universitario [PDF]

open access: yes, 2003
La principal dificultad que encuentran los estudiantes al acercarse a los equilibrios ácido-base múltiples es que precisan controlar varios equilibrios de forma simultánea.
Jiménez Liso, María Rut   +2 more
core   +2 more sources

Experimental Studies on the UV-Spectra of Several Substituted Pyridine N-Oxides and Conjugated Cationic Acids in Acetonitrile

open access: yesMolecules, 1997
The ultraviolet spectra of heterocyclic N-oxides of pyridine N-oxide series and the conjugated cationic acids (simple cations of protonated N-oxides) in acetonitrile as the representative of polar aprotic solvents, were determined.
Lech Chmurzynski
doaj   +1 more source

The Antioxidant Capability of Higenamine: Insights from Theory

open access: yesAntioxidants, 2020
Density functional theory was employed to highlight the antioxidant working mechanism of higenamine in aqueous and lipid-like environments. Different reaction mechanisms were considered for the reaction of higenamine with the •OOH radical.
Isabella Romeo   +5 more
doaj   +1 more source

Chemical modeling for pH prediction of acidified musts with gypsum and tartaric acid in warm regions [PDF]

open access: yes, 2015
Winemaking of musts acidified with up to 3 g/L of gypsum (CaSO4 2H2O) and tartaric acid, both individually and in combination, as well as a chemical modeling have been carried out to study the behaviour of these compounds as acidifiers.
Boulton   +16 more
core   +2 more sources

Spectrophotometric determination of the acidity constants of calcon in water and mixed water–organic solvents [PDF]

open access: yesJournal of the Serbian Chemical Society, 2009
The acid–base properties of calcon (1-(2-hydroxy-1-naphthylazo)-2-naphthol-4-sulfonic acid) in water and mixed water–organic solvents at 25 °C at an ionic strength of 0.10 M are studied by a multiwavelength spectrophotometric method. The organic solvents
MOHAMMAD MAZLOUM-ARDAKANI   +4 more
doaj   +3 more sources

Aromatic nitrations by mixed acid. Slow liquid-liquid reaction regime [PDF]

open access: yes, 1995
Aromatic nitrations by mixed acid have been selected as a specific case of a heterogeneous liquid-liquid reaction. An extensive experimental programme has been followed using adiabatic and heat-flow calorimetry and pilot reactor experiments, supported by
Alos, M.A.   +6 more
core   +3 more sources

The Molecule of the Week: A Didactic Tool for Teaching General Chemistry

open access: yesCHIMIA, 2020
The molecule of the week is regularly used by the author in his first-semester course General Chemistry I (Inorganic Chemistry) to illustrate, exemplify, and deepen fundamental aspects and concepts treated in the course.
Antonio Togni
doaj   +1 more source

A comparative study of the electrochemical properties of vitamin B-6 related compounds at physiological pH [PDF]

open access: yes, 2011
A comparative study of vitamin B6 group and related compounds in buffered solutions using electrochemical techniques has been performed at neutral pH.
A. Pocker   +38 more
core   +1 more source

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