Results 91 to 100 of about 59,417 (298)

X‐Ray Absorption Spectroscopy Probing of Gold Electro‐Oxidation Reveals Intermediate Surficial Au(I)

ChemElectroChem, EarlyView.
Formation of surficial Au(I)Cl during electro‐oxidation reveals that Au(+I) is present as an intermediate during oxidation toward Au(+III) oxides. The Au‐Cl deposition is observed operando by high‐energy‐resolution fluorescence‐detected near‐edge X‐ray absorption fine structure. These observations add to the evidence for step‐wise charge transfer in Au
David Degerman, Sara Boscolo Bibi, Bernadette Davies, Vladimir Grigorev, Aleksandr Kalinko, Tony Hansson, Sergey Koroidov   +6 more
wiley   +1 more source

The investigation of optimum condition of natural rubber epoxidation reaction in latex phase

Majalah Kulit, Karet, dan Plastik, 2021
Natural rubber (NR) latex epoxidation is a chemical modifcation of natural rubber to produce natural rubber with higher polarity (oil resistant) which is commonly called epoxidized natural rubber (ENR). ENR is produced from the reaction of natural rubber
Norma Arisanti Kinasih, Hani Handayani, Mohammad Irfan Fathurrohman, Asron Ferdian Falaah   +3 more
doaj   +1 more source

Flavoprotein monooxygenases for oxidative biocatalysis: recombinant expression in microbial hosts and applications [PDF]

, 2014
External flavoprotein monooxygenases comprise a group of flavin-dependent oxidoreductases that catalyze the insertion of one atom of molecular oxygen into an organic substrate and the second atom is reduced to water. These enzymes are involved in a great
Bianchi, Dario Alejandro, Ceccoli, Romina Denis, Rial, Daniela Veronica   +2 more
core   +2 more sources

Indole Synthesis via Allenyl Ester; Enantioselective Total Synthesis of Geissoschizoline

ChemistryEurope, EarlyView.
An indole synthesis via an allenyl ester intermediate at ambient temperature has been developed. The mild reaction conditions allow the use of a broad range of substrates. Notably, the utility of this approach is demonstrated through the asymmetric total synthesis of geissoschizoline, a Strychnos‐type monoterpenoid indole alkaloid.
Sohsuke Moriue, Honami Nishioka, Yuto Fukuda, Hiromitsu Takayama, Mariko Kitajima, Hayato Ishikawa   +5 more
wiley   +1 more source

Direct acetylation of sunflower oil in the presence of boron trioxide catalyst and the adduct usage as the base stock and lubricant additive

Bulletin of the Chemical Society of Ethiopia, 2017
Lubrication properties of sunflower oil have been modified by epoxidation in the first step and acetylation of the obtained epoxide in the second step.
J. Ashrafi, A. Semnani, H. S. Langeroodi, M. Shirani   +3 more
doaj   +1 more source

Recent Progress in the Preparation of Graphdiyne‐Based Materials

ChemistryEurope, EarlyView.
Graphdiyne (GDY) has emerged as a versatile carbon allotrope for cutting‐edge applications. To fully unlock the distinguished characteristics of GDY‐based materials, precise preparation is vital for structure control, which largely shapes the materials’ properties.
Ruiqiao Wu, Xinlong Fu, Changshui Huang, Jingchi Gao, Jingxiang Yang, Yuliang Li   +5 more
wiley   +1 more source

Enantioselective Synthesis of 5-epi-Citreoviral Using Ruthenium-Catalyzed Asymmetric Ring-Closing Metathesis [PDF]

, 2009
Chiral ruthenium olefin metathesis catalysts can perform asymmetric ring-closing reactions in ≥90% ee with low catalyst loadings. To illustrate the practicality of these reactions and the products they form, an enantioselective total synthesis of 5-epi ...
Funk, Timothy W.
core   +2 more sources

Lignin modification by epoxidation

BioResources, 2008
The chemical modification of lignin through hydroxymethylation and epoxidation is a way to develop new application fields and improvement of lignin performances. In this paper the influence of reaction conditions was studied using different samples of unmodified and modified lignins from annual plants (Wheat straw and Sarkanda grass).
Theodor Malutan, Raluca Nicu, Valentin I. Popa   +2 more
openaire   +3 more sources

The Versatility of Diazirines: Properties, Synthetic and Modern Applications

Chemistry – A European Journal, EarlyView.
Diazirines are 3‐membered heterocycles containing two nitrogen atoms connected by a double bond. They possess a multi‐faceted reactivity that holds great potential for organic synthesis. This review discusses their properties, modes of activation, and their many modern uses, underlining their underappreciated versatility: as carbene precursors, but ...
Mathieu L. Lepage, Emmanuel Gras
wiley   +1 more source

A minimal mathematical model of nonphotochemical quenching of chlorophyll fluorescence [PDF]

, 2010
Copyright © 2010 Elsevier Ireland Ltd.
Ebenhöh, Oliver, Houwaart, Torsten, Lokstein, Heiko, Schlede, Stephanie, Tirok, Katrin   +4 more
core   +1 more source