Search results for "Formate"
showing 10 items of 111 documents
Unraveling the Role of the Rh–ZrO2 Interface in the Water–Gas-Shift Reaction via a First-Principles Microkinetic Study
2018
The industrially important water–gas-shift (WGS) reaction is a complex network of competing elementary reactions in which the catalyst is a multicomponent system consisting of distinct domains. Herein, we have combined density functional theory calculations with microkinetic modeling to explore the active phase, kinetics, and reaction mechanism of the WGS over the Rh–ZrO2 interface. We have explicitly considered the support and metal and their interface and find that the Rh–ZrO2 interface is far more active toward WGS than Rh(111) facets, which are susceptible to CO poisoning. CO2 forming on the zirconia support rapidly transforms into formate. These findings demonstrate the central role of…
Fine-tuning scaffolds for tissue regeneration: effects of formic acid processing on tissue reaction to silk fibroin
2010
Formic acid (FA) plays a key role in the preparation of silk fibroin (SF) scaffolds from cocoons of Bombyx mori and is used for fibre distribution. In this study, we used a subcutaneous implantation model in Wistar rats to examine SF scaffolds prepared by treating the degummed cocoon with FA for either 30 or 60 min. The tissue reaction and inflammatory response to SF was assessed by qualitative histology at intervals from 3 to 180 days. Additionally, dynamic biomaterial-induced vascularization and biomaterial degradation were quantified using a technique for analysing an image of the entire implanted biomaterial. Varying the FA treatment time led to different scaffold morphologies and resul…
Frati di S. Agostino: conflitti di comunità e poteri a Genova alla metà del Cinquecento
2005
Il saggio ripercorre le vicende della comunità agostiniana di Genova, che alla metà del secolo XVI fu oggetto di un decreto di espulsione da parte delle autorità della Repubblica. All'origine del provvedimento, motivato dalle accuse di eresia e disordine interno che avevano colpito i frati del convento, vi era tuttavia la sorda lotta interna alla comunità. La presunta eterodossia dei suoi capi diviene argomento forte e decisivo per la loro rimozione in una fase storica in cui le gerarchie dell'Ordine e il S. Officio sono particolarmente sensibili verso il fenomeno di adesione dei frati alle idee riformate.
« Confessioni vestrae nonnulla visum est addere, perpauca vero commutare. » L’approbation de la Confession de foi des Églises réformées de France, ma…
2019
Questo articolo analizza l'approvazione della Confessione di Fede durante quello che viene chiamato il primo sinodo nazionale delle Chiese Riformate di Francia, tenutosi a Parigi nel maggio 1559. Secondo la storiografia, i pastori riuniti a Parigi avrebbero modificato e promulgato il testo della Confessione da una bozza redatta e inviata ai parroci da Calvino. In questo articolo Gianmarco Braghi avanza l'ipotesi che nessun testo preparatorio di Calvino sia mai stato inviato al sinodo per l'approvazione. D'altra parte, un documento parigino, l'epistola-confessione Au Roy, scritta nel settembre 1557, servì da base per il testo della Confessione. Inoltre, nel maggio 1559, Calvino non si oppose…
CCDC 1858289: Experimental Crystal Structure Determination
2018
Related Article: Britta Glowacki, Roman Pallach, Michael Lutter, Fabian Roesler, Hazem Alnasr, Dieter Schollmeyer, Cederic Thomas, Klaus Jurkschat|2018|Chem.-Eur.J.|24|19266|doi:10.1002/chem.201803952
CCDC 269812: Experimental Crystal Structure Determination
2005
Related Article: D.Schollmeyer, C.Peifer, G.Dannhardt|2005|Acta Crystallogr.,Sect.E:Struct.Rep.Online|61|o583|doi:10.1107/S1600536805003478
CCDC 986380: Experimental Crystal Structure Determination
2014
Related Article: Luke J. Murphy, Katherine N. Robertson, Scott G. Harroun, Christa L. Brosseau, Ulrike Werner-Zwanziger, Jani Moilanen, Heikki M. Tuononen, Jason A.C. Clyburne|2014|Science|344|75|doi:10.1126/science.1250808
CCDC 1529942: Experimental Crystal Structure Determination
2017
Related Article: Hervé Feuchter, Guillaume Ortiz, Yoann Rousselin, Alla Bessmertnykh-Lemeune, and Stéphane Brandès|2017|Cryst.Growth Des.|17|3665|doi:10.1021/acs.cgd.7b00217
Do dynamic effects play a significant role in enzymatic catalysis? A theoretical analysis of formate dehydrogenase.
2010
A theoretical study of the protein dynamic effects on the hydride transfer between the formate anion and nicotinamide adenine dinucleotide (NAD + ), catalyzed by formate dehydrogenase (FDH), is presented in this paper. The analysis of free downhill molecular dynamic trajectories, performed in the enzyme and compared with the reaction in aqueous solution, has allowed the study of the dynamic coupling between the reacting fragments and the protein or the solvent water molecules, as well as an estimation of the dynamic effect contribution to the catalytic effect from calculation of the transmission coefficient in the enzyme and in solution. The obtained transmission coefficients for the enzyme…
Syntheses and reactivity of oxo niobocene complexes Cp*2Nb(O)X (X=H, OCH3) and crystal structures of [Cp*2Nb(OH)F]BF4 and Cp*2Nb(O)OC(O)H (Cp*=η5-C…
1998
Abstract Reaction of Cp*2NbCl2 (Cp*=η5-C5Me5) with KOH or Ba(OH)2·8H2O in THF forms the complexes Cp*2Nb(O)X (X=Cl: 2, H: 3). The ratio of 2 and 3 depends on the stoichiometry. If NaOMe is added or MeOH in solution Cp*2Nb(O)OMe 4 is formed in good yields. Reactivity studies with 3 and 4 show that the NbO as well as the Nb–X unit behave as chemically active sites. Protonation of 3 or 4 with HBF4 is followed by an attack of fluoride (from BF4− anion) to give [Cp*2Nb(OH)F]BF4 6 and [Cp*2NbF2]BF4 7. In contrast the reaction of 3 or 4 with HCO2H results in an exchange of X− by formate to give Cp*2Nb(O)OC(O)H 8. The crystal structures of 6 and 8 are reported. Electrochemical investigations of…