Results 21 to 30 of about 683,436 (300)

Studi mekanisme kinetika reaksi pertukaran ion FeIII antara dua jenis ligan siderophore bakteri desferriferrioxamine B dan azoverdine dengan ligan EDTA

open access: yesJournal of Biological Researches, 1995
The kinetics of iron exchange and iron removal from two siderophore complex with use of ethylenediaminetetraacetic acid (EDTA) have been examined, using UV-Vis spectrophotometric method.
Handoko Darmokoesoemo, A.M Albert-Gary
doaj   +1 more source

Determination of Lactate by Sequential Injection Analysis Using a Fluoride Ion-selective Electrode Detector

open access: yesElectrochemistry, 2020
A combination of sequential Injection Analysis (SIA) system and the ion-selective electrode (ISE) detector is considered to be one of a very effective analytical method. Reaction of lactate with lactate oxidase produces pyruvic acid and hydrogen peroxide.
Yuichi TAKAHASHI, Takashi MASADOME
doaj   +1 more source

Tip-sample interactions in atomic force microscopy: I. Modulating adhesion between silicon nitride and glass [PDF]

open access: yes, 1991
An adhesive interaction between a silicon nitride AFM tip and glass substrate in water is described. This adhesion is in the range 5-40 nN, of which a large component is likely to be due to hydrogen bonding between the silanol groups on both surfaces ...
Hansma, Paul K.   +2 more
core   +1 more source

Nonlinear, electrocatalytic swimming in the presence of salt

open access: yes, 2012
A small, bimetallic particle in a hydrogen peroxide solution can propel itself by means of an electrocatalytic reaction. The swimming is driven by a flux of ions around the particle.
Sabass, Benedikt, Seifert, Udo
core   +1 more source

Free Radical Generation From Hydrazine Decomposition Catalyzed by Pt/SiO2 in Different Acid-Base Systems

open access: yesHe huaxue yu fangshe huaxue
Electron spin resonance spectroscopy(ESR) was used to investigate the effects of hydrogen ion concentration and hydroxide concentration in perchloric acid system and sodium hydroxide system on the state and behavior of free radicals generated by ...
LI Bin   +4 more
doaj   +1 more source

Structural instability impairs function of the UDP‐xylose synthase 1 Ile181Asn variant associated with short‐stature genetic syndrome in humans

open access: yesFEBS Letters, EarlyView.
The Ile181Asn variant of human UDP‐xylose synthase (hUXS1), associated with a short‐stature genetic syndrome, has previously been reported as inactive. Our findings demonstrate that Ile181Asn‐hUXS1 retains catalytic activity similar to the wild‐type but exhibits reduced stability, a looser oligomeric state, and an increased tendency to precipitate ...
Tuo Li   +2 more
wiley   +1 more source

Energy-efficient modular water purification system via concurrent freshwater and hydrogen generation using ion concentration polarization

open access: yesCommunications Materials
This study demonstrates a compact, modular platform that simultaneously generates freshwater and hydrogen gas by leveraging nanoelectrokinetic ion concentration polarization through cation-exchange membranes (CEMs).
Jihee Park   +9 more
doaj   +1 more source

Water sorption and solubility of glass ionomer cements indicated for atraumatic restorative treatment considering the time and the pH of the storage solution

open access: yesRGO: Revista Gaúcha de Odontologia, 2018
Objective: Evaluate the water sorption and the solubility of glass ionomer cements considering the time and the pH of the storage solution. Methods: The materials used in this survey study were the following ones: Ketac Molar Easymix, Maxxion R, Vitro ...
Renally Bezerra Wanderley e LIMA   +4 more
doaj   +1 more source

Amino acids: inhibitors or promoters of anaerobic biocorrosion of steels? [PDF]

open access: yes, 2007
Various authors have shown that some amino acids can act as corrosion inhibitors, which has generated an increasing interest in these compounds as substitutes to conventional corrosion inhibitors that are usually toxic [1,2].
Basséguy, Régine   +5 more
core   +6 more sources

Structural biology of ferritin nanocages

open access: yesFEBS Letters, EarlyView.
Ferritin is a conserved iron‐storage protein that sequesters iron as a ferric mineral core within a nanocage, protecting cells from oxidative damage and maintaining iron homeostasis. This review discusses ferritin biology, structure, and function, and highlights recent cryo‐EM studies revealing mechanisms of ferritinophagy, cellular iron uptake, and ...
Eloise Mastrangelo, Flavio Di Pisa
wiley   +1 more source

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