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CH4 Synthesis From CO2 and NH3 Over Oxide‐Supported Ru Catalysts
ChemCatChem, Volume 18, Issue 15, 14 August 2026.CO2 + NH3 methanation is a promising route to carbon‐neutral fuel synthesis. For oxide‐supported Ru catalysts, the basic character of the support strongly governs catalytic activity. Oxide supports with moderate basic character, such as ZrO2, prove optimal for CH4 production by facilitating both the destabilization of surface isocyanate species (NCO*),
Katsutoshi Sato +5 more
wiley +1 more source
Current Protocols, Volume 6, Issue 8, August 2026.Abstract Solid‐phase RNA synthesis is challenging because the 2'‐hydroxyl requires a protecting group that is stable during chain assembly yet easily removable without degrading the product. Driven by the demand for long RNA therapeutics, we report a synthesis method using 2'‐O‐acetal levulinic ester (ALE) ribonucleoside 3'‐O‐phosphoramidites.
Zidi Lyu, Adam Katolik, Masad J. Damha
wiley +1 more source
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Urea–formaldehyde resin prepared with concentrated formaldehyde
Journal of Adhesion Science and Technology, 2016AbstractThe characteristics of UF resin prepared with concentrated formaldehyde were studied in this paper. With the molar ratio F/U = 1.1, the UF resin prepared with concentrated formaldehyde showed better mechanical properties than that with formalin. The 13C-NMR and FTIR results indicated that there were more methylene groups, ether groups and urons
Zhigang Wu, Xuedong Xi, Jiankun Liang
exaly +2 more sources
Journal of Adhesion Science and Technology, 2018
In industry, formalin and urea formaldehyde condensates (UFC) are used for the preparation of urea-formaldehyde adhesives. The aim of this study was to evaluate the characteristics of a UF resin prepared with formalin (42% concentration) and two kinds of UFC with various urea content (F/U ∼ 5 and 4.3 malar ratio).
Manouchehr Mamaghani +2 more
exaly +2 more sources
In industry, formalin and urea formaldehyde condensates (UFC) are used for the preparation of urea-formaldehyde adhesives. The aim of this study was to evaluate the characteristics of a UF resin prepared with formalin (42% concentration) and two kinds of UFC with various urea content (F/U ∼ 5 and 4.3 malar ratio).
Manouchehr Mamaghani +2 more
exaly +2 more sources
Electrochemical treatment of wastewater containing Urea-Formaldehyde and Melamine-Formaldehyde
Chemosphere, 2023The wastewater containing urea-formaldehyde (UF) and melamine-formaldehyde (MF) from the medium-density fiberboard (MDF) lamination factory disposed into the waterbodies adversely affects human health and aquatic life. Therefore, its treatment before discharge is necessary.
Tamt Ul, Nisa +4 more
openaire +3 more sources
Formaldehyde levels in homes insulated with urea-formaldehyde foam
Environmental Monitoring and Assessment, 1982Twenty seven UFFI homes in Colorado and Wisconsin were sampled for formaldehyde levels. The formaldehyde concentrations found in these homes averaged 0.059 ppm. Two homes were monitored for an extended period to determine the impact of ambient climatic conditions.
W C, Schutte +3 more
openaire +2 more sources
Journal of Polymers and the Environment, 2020
In view of the fact that a large amount of formaldehyde was involved in the production of urea–formaldehyde fertilizer, and the residual and decomposed formaldehyde has never been paid attention to. In this paper, the determination method of free formaldehyde content in urea–formaldehyde fertilizer was studied.
Yan Liu +8 more
openaire +1 more source
In view of the fact that a large amount of formaldehyde was involved in the production of urea–formaldehyde fertilizer, and the residual and decomposed formaldehyde has never been paid attention to. In this paper, the determination method of free formaldehyde content in urea–formaldehyde fertilizer was studied.
Yan Liu +8 more
openaire +1 more source
The reaction of urea with formaldehyde
Recueil des Travaux Chimiques des Pays-Bas, 1952AbstractThe reaction of urea and formaldehyde, giving monomethylolurea, is reversible in a neutral, acid or alkaline aqueous solution, the forward reaction being bimolecular and the reverse reaction monomolecular.The forward and reverse reactions are catalyzed to the same extent by hydrogen ions as well as by hydroxyl ions.
J. I. de Jong, J. de Jonge
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Urea–Formaldehyde and Melamine–Formaldehyde Polymers
1989According to Meyer1 the history of urea–formaldehyde (UF) resins can be divided into five different periods: (i) Synthesis of the raw materials urea and formaldehyde. This period started with the synthesis of urea by Wohler in 1824. Formaldehyde was first recognized by Butlerov in 1859 when attempting to synthesize methanediol.
Dietrich Braun, Hans-Josef Ritzert
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Urea-Formaldehyde Resins and Free Formaldehyde Content
Acta Biologica Hungarica, 1998Specifications of wood adhesives must be in correlation with the requirements for the corresponding wood products, for which they will be used. Formaldehyde emission of wood products bonded with urea-formaldehyde resin based adhesives is strictly regulated by standards and there is a compromise is between formaldehyde emission and performance, such as ...
openaire +2 more sources