Results 11 to 20 of about 2,593,431 (288)

A Green Solventless Protocol for the Synthesis of β-Enaminones and β-Enamino Esters Using Silica Sulfuric Acid as a Highly Efficient, Heterogeneous and Reusable Catalyst

E-Journal of Chemistry, 2010
Silica sulfuric acid is utilized as a green, highly efficient, heterogeneous and recyclable catalyst for the preparation of β-enaminones and β-enamino esters from amines and β-dicarbonyl compounds under solvent-free conditions at 80 °C. Using this method,
Alireza Hasaninejad, Abdolkarim Zare, Mohammad Rez Mohammadizadeh, Mohsen Shekouhy, Ahmad Reza Moosavi-Zare   +4 more
doaj   +2 more sources

STARCH SULFURIC ACID: AN ALTERNATIVE, ECO-FRIENDLY CATALYST FOR BIGINELLI REACTION [PDF]

Chemistry Journal of Moldova: General, Industrial and Ecological Chemistry, 2013
The one-pot multicomponent synthesis of 3,4-dihydropyrimidinone derivatives using starch sulfuric acid as an environmentally friendly biopolymer-based solid acid catalyst from aldehydes, β-keto esters and urea/ thiourea without solvent is described ...
Ramin Rezaei, Sara Malek, Mohammad Reza Sheikhi, Mohammad Kazem Mohammadi   +3 more
doaj   +1 more source

Contribution of sulfuric acid and oxidized organic compounds to particle formation and growth [PDF]

, 2012
Lack of knowledge about the mechanisms underlying new particle formation and their subsequent growth is one of the main causes for the large uncertainty in estimating the radiative forcing of atmospheric aerosols in global models.
Curtius, Joachim, Ehrhart, Sebastian, A. Kürten, Rondo, L., Ehn, Mikael, Petäjä, Tuukka, E. Weingartner, Weingartner, Ernest, P. Barmet, Riccobono, F., Baltensperger, U., Dommen, Josef, M. Kulmala, F. Riccobono, Barmet, Peter, M. Ehn, Ehrhart, S., U. Baltensperger, Sipilä, Mikko, Kürten, Christoph Andreas, Baltensperger, Urs, Weingartner, E., M. Sipilä, S. Ehrhart, Dommen, J., Barmet, P., Curtius, J., Kuerten, A., J. Curtius, J. Mikkilä, Ehn, M., Kürten, Andreas, Paasonen, Pauli, P. Paasonen, J. Dommen, Rondo, Linda, L. Rondo, Riccobono, Francesco, Mikkilä, Jyri, T. Petäjä, Kulmala, Markku   +40 more
core   +2 more sources

Preparation of New 2,3-Diphenylpropenoic Acid Esters – Good Yields Even for the More Hindered Z Isomers [PDF]

, 2004
The potassium salt of E- and Z-2,3-diphenylpropenoic acids prepared in situ could be esterified efficiently in DMSO with the appropriate alkyl halides at room temperature.
Boros, László, Károly Felföldi, Pálinkó István, Felföldi, Károly, Pálinkó, István, István Pálinkó, Felföldi Károly, Károly Felföldi, Boros László, István Pálinkó, László Boros, László Boros   +11 more
core   +1 more source

Performance of a corona ion source for measurement of sulfuric acid by chemical ionization mass spectrometry [PDF]

, 2010
The performance of an ion source based on corona discharge has been studied. This source is used for the detection of gaseous sulfuric acid by chemical ionization mass spectrometry (CIMS) through the reaction of NO−3 ions with H2SO4.
Rondo, L, Ehrhart, Sebastian, Curtius, Joachim, A. Kürten, Rondo, Linda, L. Rondo, Kürten, Christoph Andreas, J. Curtius, Curtius, J, S. Ehrhart, Ehrhart, S, Kürten, A   +11 more
core   +2 more sources

Fatty Acid Methyl Esters as Biosolvents of Epoxy Resins: A Physicochemical Study [PDF]

, 2007
The C8 to C18 fatty acid methyl esters (FAME) have been compared as solvents for two epoxy resin pre-polymers, bisphenol A diglycidyl ether (DGEBA) and triglycidyl paminophenol ether (TGPA).
Thiebaud-Roux, Sophie, Lacaze-Dufaure, Corinne, De Caro, Pascale, Medina-Gonzalez, Yaocihuatl   +3 more
core   +1 more source

Synthesis and Biological evalution of some substituted 2-dibenzyl amino 1,3,4-oxadiazoles , thiadiazoles and 1,2,4-triazoles [PDF]

مجلة التربية والعلم, 2013
In this paper the synthesis of some substituted 2-dibenzyl 1,3,4-oxadiazole, thiadiazole and 1,2,4-triazoles derived from dibenzyl amine is reported scheme-1.
Khalid Daoud, Shaima Ismmaeel
doaj   +1 more source

Production of biodiesel from fat of secondary crab materials

Известия ТИНРО, 2023
Production  of  biodiesel  from  the  fat-containing  entrails  of  king  crab  is investigated. These secondary raw materials are massively disposed (released into the sea) after separation of limbs. Routine technologies of the biodiesel production from
O. Y. Mezenova, S. N. Maksimova
doaj   +1 more source

Experimental and modeling studies on the synthesis and properties of higher fatty esters of corn starch [PDF]

, 2009
This paper describes a systematic study on the synthesis of higher fatty esters of corn starch (starch laurate and starch stéarate) by using the corresponding vinyl esters.
Picchioni, Francesco; id_orcid, Heeres, Hero J.; id_orcid, Heeres, Hero J., Janssen, L. P. B. M.,, Janssen, Leon P. B. M., Picchioni, F.,, Manurung, Robert, Picchioni, Francesco, Sugih, Asaf K., Sugih, A. K.,, Manurung, R.,, Junistia, Laura, Heeres, H. J.,, Junistia, L.,   +13 more
core   +1 more source

One-Step Process of Mixed Oleic Acid Esters and Its High Temperature Lubrication Properties in Bentonite Gelling Suspension

Gels, 2022
In recent years, with the increase in requirements for horizontal wells, ultra-high depth wells, small wells and branching wells, it has become increasingly important to deal with the conflict between drilling safety and bottomhole friction.
Xincheng Bao, Cunfa Ma, Fengshan Zhou
doaj   +1 more source