Results 1 to 10 of about 5,105,997 (296)

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

Nature 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, Tiankai Zhang, Yang Chai, Chun-Fai Ng, Thomas C. W. Mak, Jianbin Xu, Keyou Yan   +6 more
doaj   +3 more sources

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

Brazilian 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, Mirella de Fátima Liberato de Moura, Fabiola Galbiatti de Carvalho, Gymenna Maria Tenório Guênes, Polliana Muniz Alves, Matheus Melo Pithon   +5 more
doaj   +2 more sources

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

Biofuel 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, Asdarina Binti Yahya, Phannipha Daisuk, Artiwan Shotipruk   +3 more
doaj   +1 more source

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

Molecules, 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, Hianna Arely Milca Fagundes Silva, José Guedes da Silva Júnior, Mônica Camelo Pessoa de Azevedo Albuquerque, Luana Cassandra Breitenbach Barroso Coelho, André de Lima Aires   +5 more
doaj   +1 more source

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

ChemistryOpen, 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, Wataru Obata, Prof. Tatsumi Ishihara   +2 more
doaj   +1 more source

Innovative cycling reaction mechanisms of CO2 absorption in amino acid salt solvents

Chemical Engineering Journal Advances, 2022
Amino acid salt (AAS) solvents with equimolar base (used to obtain the salt) to amino acid (AA) have been well studied for CO2 absorption, however, very little is known about the reactions when more base is applied.
Zhenghong Bao, Qingyang Li, Novruz G. Akhmedov, Benjamin A. Li, Malcolm Xing, Jingxin Wang, Badie I. Morsi, Bingyun Li   +7 more
doaj   +1 more source

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

مجلة 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

Foam-like boron-doped g-C3N4 as acid-base cooperative catalyst for efficient nucleophilic addition in water

Green Chemical Engineering, 2021
Intramolecular acid-base cooperative catalysis is a powerful strategy to promote the nucleophilic additions in synthetic chemistry, since both substrates and nucleophiles can be activated simultaneously, yielding a lower energy reaction pathway. However,
Jiajun Wang, Zewei Liu, Shiye Li, Chaoping Li, Su Liu, Jingwen Feng, Rong Tan   +6 more
doaj   +1 more source

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

Frontiers 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, Haifeng Li, Xiaochen Wang, Anqiu Liu   +3 more
doaj   +1 more source

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

Chemistry 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