Results 1 to 10 of about 4,963,956 (222)

Nonstoichiometric acid–base reaction as reliable synthetic route to highly stable CH3NH3PbI3 perovskite film [PDF]

open access: yesNature Communications, 2016
The stability of perovskite thin films and devices depends on a number of environmental factors, amongst which humidity. Here, Longet al. develop a synthetic route using a nonstoichiometric acid-base reaction to prepare films stable in humid environments
Mingzhu Long   +6 more
doaj   +3 more sources

Histological analysis of biocompatibility of ionomer cements with an acid-base reaction

open access: yesBrazilian Oral Research, 2014
The purpose of this study was to evaluate the inflammatory and cure events of acid-based reactions using glass ionomer cement used for cementation of crowns, bridges, onlays and orthodontic bands implanted in subcutaneous tissue, at different time ...
Rogério Lacerda dos Santos   +5 more
doaj   +2 more sources

Enzymatic esterification/transesterification of rice bran acid oil for subsequent γ-oryzanol recovery [PDF]

open access: yesBiofuel Research Journal, 2023
This study recovered γ-oryzanol from rice bran acid oil (RBAO), following an initial enzymatic esterification/transesterification to selectively convert its glyceride impurities into fatty acid ethyl esters (FAEEs) or biodiesel.
Chonlatep Usaku   +3 more
doaj   +1 more source

The Natural Compound Hydrophobic Usnic Acid and Hydrophilic Potassium Usnate Derivative: Applications and Comparisons

open access: yesMolecules, 2021
Usnic acid is the best-studied lichen metabolite, presenting several biological activities, such as antibacterial, immunostimulating, antiviral, antifungal, anti-inflammatory, and antiparasitic agents; despite these relevant properties, it is a ...
Hallysson Douglas Andrade de Araújo   +5 more
doaj   +1 more source

Oxidative Conversion of Glucose to Formic Acid as a Renewable Hydrogen Source Using an Abundant Solid Base Catalyst

open access: yesChemistryOpen, 2021
Formic acid is one of the most desirable liquid hydrogen carriers. The selective production of formic acid from monosaccharides in water under mild reaction conditions using solid catalysts was investigated. Calcium oxide, an abundant solid base catalyst
Dr. Atsushi Takagaki   +2 more
doaj   +1 more source

A simple theoretical, quantitative approach to help understand the titration of weak acids and bases

open access: yesChemistry Teacher International, 2021
What happens at the very beginning of the titration of a weak acid or base is a question sometimes asked by undergraduate students when introduced to the concept of buffer solution.
Arocena Miguel
doaj   +1 more source

Cascade Upgrading of Biomass-Derived Furfural to γ-Valerolactone Over Zr/Hf-Based Catalysts

open access: yesFrontiers in Chemistry, 2022
Biomass feedstocks are promising candidates of renewable clean energy. The development and utilization of biological energy is in line with the concept of sustainable development and circular economy.
Wenjuan Sun   +3 more
doaj   +1 more source

تحضير بعض مركبات الثايادايازول والاوكسادايازول المشتقة من حامض السيناميك ومعوضاته [PDF]

open access: yesمجلة ابحاث كلية التربية الاساسية, 2018
In this paper we prepared 4-nitrocenamic acid and cenamic acid (1,2) by reaction of one mole of (4-nitrobanzaldehyde and benzaldehyde) in the acetic hydrate potassium acetate as a base, then comes the reaction of number (1) compound to saturate double ...
م.د. نعم حازم سليم
doaj   +1 more source

KINETICS AND MECHANISMS OF THE ACID-BASE REACTION BETWEEN NH3 AND HCOOH IN INTERSTELLAR ICE ANALOGS [PDF]

open access: yes, 2016
Interstellar complex organic molecules are commonly observed during star formation, and are proposed to form through radical chemistry in icy grain mantles.
J. Bergner   +3 more
semanticscholar   +1 more source

DFT Calculation of the Mechanism of the Acid-Catalyzed Aldol Condensation of a Lubricant Base Stock

open access: yesLubricants, 2023
Aldehyde condensation is a reaction step in the oxidization of a lubricant base stock into high-molecular-weight products, forming sludge and a paint film, which lead to the failure of lubricating oil.
Yan Li, Lei Xia, Rendong Liu
doaj   +1 more source

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