Searched for: subject:"Gold%5C+for%5C+Gold"
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Alfeld, M. (author), De Nolf, W. (author), Cagno, S. (author), Appel, K. (author), Siddons, D.P. (author), Kuczewski, A. (author), Janssens, K. (author), Dik, J. (author), Trentelman, K. (author), Walton, M. (author), Sartorius, A. (author)
Over the past several decades the oeuvre of Rembrandt has been the subject of extensive art historical and scientific investigations. One of the most striking features to emerge is his frequent re-use of canvases and panels. The painting An Old Man in Military Costume (78.PB.246), in the collection of the J. Paul Getty Museum, is an example of...
journal article 2012
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Kara, S. (author), Spickermann, D. (author), Schrittwieser, J.H. (author), Leggewie, C. (author), Van Berkel, W.J.H. (author), Arendsa, I.W.C.E. (author), Hollmann, F. (author)
1,4-Butanediol is shown to be an efficient cosubstrate to promote NAD(P)H-dependent redox biocatalysis. The thermodynamically and kinetically inert lactone coproduct makes the regeneration reaction irreversible. Thereby not only the molar surplus of cosubstrate is dramatically reduced but also faster reaction rates are obtained.
journal article 2012
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Hanefeld, U. (author)
Hydroxynitrile lyases are a versatile group of enzymes that are applied both in the laboratory and on an industrial scale. What makes them particularly interesting is that to date five structurally unrelated categories of hydroxynitrile lyases have been discovered. Given their great importance they have often been immobilised utilising many...
journal article 2013
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Tahmasebpoor, M. (author), Mart?n, L. De (author), Talebi, M. (author), Mostoufia, N. (author), Van Ommen, R.J. (author)
The effect of surface characteristics on the interaction between nanoparticles and their agglomeration in dense gas suspensions is still not fully understood. It is known that when the surface is covered with hydroxyl groups, the interaction between nanoparticles becomes substantially stronger than in the absence of these groups; this...
journal article 2013
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Goulas, A. (author), Van Ommen, J.R. (author)
We report the fabrication of platinum nanoclusters with a narrow size distribution on TiO2 nanoparticles using atomic layer deposition. With MeCpPtMe3 and ozone as reactants, the deposition can be carried out at a relatively low temperature of 250 degrees C. Our approach of working with suspended nanoparticles at atmospheric pressure gives...
journal article 2013
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Li, J. (author), Spina, A. (author), Moulijn, J.A. (author), Makkee, M. (author)
The sorbitol conversion in a molten salt hydrate medium (ZnCl2; 70 wt% in water) was studied. Dehydration is the main reaction, initially 1,4- and 3,6-anhydrosorbitol are the main products that are subsequently converted into isosorbide; two other anhydrohexitols, (1,5- and 2,5-), formed are in less amounts and do not undergo further dehydration...
journal article 2013
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Li, J. (author), Soares, H.S.M.P. (author), Moulijn, J.A. (author), Makkee, M. (author)
The hydrolysis and hydrogenation of cellobiose (4-O-b-D-glucopyranosyl-D-glucose) in ZnCl2_4H2O solvent was studied to optimize the conditions for conversion of lignocellulose (the most abundant renewable resource) into sorbitol (D-glucitol). Water at neutral pH does not allow hydrolysis of cellobiose under the conditions of the experiments (up...
journal article 2013
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Sheldon, R.A. (author), Van Pelt, S. (author)
In this tutorial review, an overview of the why, what and how of enzyme immobilisation for use in biocatalysis is presented. The importance of biocatalysis in the context of green and sustainable chemicals manufacture is discussed and the necessity for immobilisation of enzymes as a key enabling technology for practical and commercial viability...
journal article 2013
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Kruit, K.D. (author), Vervloet, D. (author), Kapteijn, F. (author), Van Ommen, J.R. (author)
Non-ASF product distributions in Fischer–Tropsch synthesis can occur with a gradient in process conditions at the particle or reactor scale, leading to a gradient in chain growth probability a.Weighted summation of local product distributions gives the proper, non-ASF product distribution.
journal article 2013
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Petrus, M.L. (author), Bouwer, R.K.M. (author), Lafont, U. (author), Murthy, D.H.K. (author), Kist, R.J.P. (author), Böhm, M.L. (author), Olivier, Y. (author), Savenije, T.J. (author), Siebbeles, L.D.A. (author), Greenham, N.C. (author), Dingemans, T.J. (author)
Three conjugated triphenylamine-based poly(azomethine)s were prepared via well-known polycondensation chemistry using cheap and readily available starting materials and the results were contrasted with rrP3HT. Three functionalized diaminetriphenylamines (TPA(X), X ¼ –H, –OMe, –CN) were polymerized in a simple one-step process with 2,3...
journal article 2013
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Schrittwieser, J.H. (author), Resch, V. (author)
Alkaloids are not only one of the most intensively studied classes of natural products, their wide spectrum of pharmacological activities also makes them indispensable drug ingredients in both traditional and modern medicine. Among the methods for their production, biotechnological approaches are gaining importance, and biocatalysis has emerged...
journal article 2013
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Juan-Alcaniz, J. (author), Gielisse, R. (author), Lago, A.B. (author), Ramos-Fernandez, E.V. (author), Serra-Crespo, P. (author), Devic, T. (author), Guillou, N. (author), Serre, C. (author), Kapteijn, F. (author), Gascon, J. (author)
In this work, the inclusion of free sulfonic acid groups in highly stable MOFs is explored. The synthesized catalysts have been applied in a model esterification reaction. Two metal organic frameworks bearing sulfonic acid moieties are investigated: HSO3-MIL-101(Cr) synthesized following different approaches and a new structure based on HSO3-bdc...
journal article 2013
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Mashaghi, A. (author), Mashaghi, S. (author), Reviakine, I. (author), Heeren, R.M.A. (author), Sandoghdarf, V. (author), Bonn, M. (author)
We review recent progress in the study of the structure and dynamics of phospholipid membranes and associated proteins, using novel label-free analytical tools. We describe these techniques and illustrate them with examples highlighting current capabilities and limitations. Recent advances in applying such techniques to biological and model...
journal article 2013
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Van Leest, T. (author), Caroa, J. (author)
On-chip optical trapping and manipulation of cells based on the evanescent field of photonic structures is emerging as a promising technique, both in research and for applications in broader context. Relying on mass fabrication techniques, the involved integration of photonics and microfluidics allows control of both the flow of light and water...
journal article 2013
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Ranoux, A. (author), Djanashvili, K. (author), Arends, I.W.C.E. (author), Hanefeld, U. (author)
Novel amorphous mesoporous borosilicate, B-TUD-1, was prepared to test its performance for different sustainable reactions. The structure of the material, the effective incorporation of boron into the framework as well as the nature of incorporated boron were verified by N2-sorption, XRD, ICP-OES, TEM, NH3-desorption, MAS NMR and FTIR. The...
journal article 2013
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Schrittwieser, J. (author), Coccia, F. (author), Kara, S. (author), Grischek, B. (author), Kroutil, W. (author), d'Alessandro, N. (author), Hollmann, F. (author)
One-pot combinations of sequential catalytic reactions can offer practical and ecological advantages over classical multi-step synthesis schemes. In this context, the integration of enzymatic and chemo-catalytic transformations holds particular potential for efficient and selective reaction sequences that would not be 10 possible using either...
journal article 2013
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Goesten, M.G. (author), Kapteijn, F. (author), Gascon, J. (author)
Reticular design is a highly attractive concept, but coordination chemistry around the tectonic units of metal– organic frameworks (MOFs) and additional interplay with anionic and solvent species provide for dazzling complexity that effectively rules out structure prediction. We can however study the chemistry around pre-existing clusters, and...
journal article 2013
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Nasalevich, M.A. (author), Goesten, M.G. (author), Savenije, T.J. (author), Kapteijn, F. (author), Gascon, J. (author)
NH2-MIL-125(Ti) has been post-synthetically functionalized with dye-like molecular fragments. The new material (methyl red-MIL- 125(Ti)) exhibits improved light absorption over a wide range of the visible spectrum, and shows enhanced photocatalytic oxidation activity under visible light illumination. The consequences of functionalization and the...
journal article 2013
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Malladi, S. (author), Shen, C. (author), Xu, Q. (author), De Kruijff, T. (author), Yücelen, E. (author), Tichelaar, F. (author), Zandbergen, H. (author)
An approach to carry out chemical reactions using aggressive gases in situ in a transmission electron microscope (TEM), at ambient pressures of 1.5 bar using a windowed environmental cell, called a nanoreactor, is presented here. The nanoreactor coupled with a specially developed holder with platinum tubing permits the usage of aggressive...
journal article 2013
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Danon, B. (author), Marcotullio, G. (author), De Jong, W. (author)
In this paper both the mechanistic and kinetic aspects of furfural formation from pentoses in aqueous acidic media have been reviewed. Based on the reviewed literature, a comprehensive reaction mechanism has been proposed consisting of more than one route, all starting from acyclic xylose, and involving alternately 1,2-enolization, ?-elimination...
journal article 2013
Searched for: subject:"Gold%5C+for%5C+Gold"
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