Results 21 to 30 of about 1,113,567 (292)

Comparison of three methods for rendering plant fat transesterification

open access: yesResearch in Agricultural Engineering, 2013
Three most frequently used methods for fat transesterification were compared using rendering plant fat (RPF) as model. Acid-catalysed transesterification was found to be the most effective (conversion 90%) at optimum conditions (fat: methanol ratio 1:10,
A. Prošková   +3 more
doaj   +1 more source

Ultrasonic Assisted Synthesis, Characterization and Bioactivity Assessment of Novel Piperonal Based Schiff Base and Its Metal Complexes [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 2020
A novel Schiff base was synthesized by the reaction of piperonal and anthranilic acid, which was further utilized in the synthesis of five novel complexes by reaction with different metal salts ultrasonically.
Obaid-Ur-Rahman Abid   +6 more
doaj   +1 more source

Methods for synthesizing diethyl carbonate from ethanol and supercritical carbon dioxide by one-pot or two-step reactions in the presence of potassium carbonate [PDF]

open access: yes, 2009
Carbon dioxide sequestration was studied by synthesizing diethyl carbonate (DEC) from ethanol and CO2 under supercritical conditions in the presence of potassium carbonate as a base. The co-reagent was ethyl iodide or a concentrated strong acid.
Gasc, Fabien   +2 more
core   +1 more source

Reações ácido-base: conceito, representação e generalização a partir das energias envolvidas nas transformações

open access: yesQuímica Nova, 2012
Undergraduate students on the first year of Chemistry Courses are unfamiliar with the representation of acid-base reactions using the ionic equation H+ + OH- → H2O.
Iêda Aparecida Pastre   +4 more
doaj   +1 more source

Synthesis and analysis of stable isotope-labelled N-acyl homoserine lactones [PDF]

open access: yes, 2016
Aliphatic aldehydes were deuterated at the alpha-position via a base-catalyzed exchange reaction with D2O. These deuterated building blocks were used for the synthesis of labelled analogues of quorum sensing signal molecules belonging to the three major ...
De Kimpe, Norbert   +3 more
core   +2 more sources

Iridium oxide as actuator material for the ISFET-based sensor-actuator system [PDF]

open access: yes, 1991
Acid or base concentrations can be determined by performing an acid-base titration with Coulometrically generated OH- or H+ ions at a noble-metal actuator electrode in close proximity to the pH-sensitive gate of an ISFET.
Bergveld, Piet   +5 more
core   +2 more sources

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

open access: yesChemical 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   +7 more
doaj  

[PdCl2{8-(di-tert-butylphosphinooxy)quinoline)}]: a highly efficient catalyst for Suzuki-Miyaura reaction [PDF]

open access: yes, 2009
The complex [PdCl2(P-N)] containing the basic and sterically demanding 8-(di-tert-butylphosphinooxy)quinoline ligand (P-N) is a highly efficient catalyst for the coupling of phenylboronic acid with aryl bromides or aryl chlorides.
Antonaroli, S   +4 more
core   +2 more sources

Synthesis of new annulated pyrano[2,3-d]pyrimidine derivatives using organo catalyst (DABCO) in aqueous media

open access: yesJournal of Saudi Chemical Society, 2017
A selective method for the synthesis of annulated pyrano[2,3-d]pyrimidines has been developed. It was shown that base catalysis is more efficient in this reaction, rather than acid catalysis as it is believed that 1,4-diazabicyclo[2.2.2]octane (DABCO) is
Ajmal R. Bhat   +2 more
doaj   +1 more source

YÜKSEK DERİŞİMDE FOSFORÖZ ASİTTEN POTASYUM FOSFİT TUZLARI ÜRETİMİNDE REAKTÖR İŞLETİM TÜRÜNÜN ETKİSİ

open access: yesEskişehir Osmangazi Üniversitesi Mühendislik ve Mimarlık Fakültesi Dergisi, 2021
In the production of potassium phosphite salts (monopotassium phosphite and dipotassium phosphite salts) formed as a result of the neutralization reaction of phosphorous acid and potassium hydroxide.
Zeynep YILMAZER HİTİT   +5 more
doaj   +1 more source

Home - About - Disclaimer - Privacy