Search Results - "Van Den Heuvel, Johannes C."

Highly Mixed Phases in Ball-milled Cu/ZnO Catalysts:  An EXAFS and XANES Study by Grandjean, Didier, Castricum, Hessel L, van den Heuvel, Johannes C, Weckhuysen, Bert M

“…New highly mixed phases have been identified in Cu/ZnO systems by EXAFS and XANES at both the Cu and Zn K-edge. The phases were generated by ball-milling…”
Get full text

Dynamic Cu/Zn Interaction in SiO2 Supported Methanol Synthesis Catalysts Unraveled by in Situ XAFS by Grandjean, Didier, Pelipenko, Vladimir, Batyrev, Erdni D, van den Heuvel, Johannes C, Khassin, Alexander A, Yurieva, Tamara. M, Weckhuysen, Bert M

“…In situ X-ray absorption spectroscopy XAFS at the Cu and Zn K-edge has been used to unravel the Cu/Zn interaction and identify the possible active site of…”
Get full text

Location and limitation of cellulose production by Acetobacter xylinum established from oxygen profiles by Verschuren, Peter G., Cardona, Thomas D., Nout, M.J.Robert, De Gooijer, Kees D., Van den Heuvel, Johannes C.

“…The static fermentation of coconut water sucrose by Acetobacter xylinum was carried out at initial pH's of 3.0, 4.0, 5.0 or 6.0. Cellulose was produced at the…”
Get full text

Substrate controlled development of anaerobic acidifying aggregates at different shear rates in a gas lift reactor by Verschuren, Peter G., van den Heuvel, Johannes C.

“…The influence of liquid shear rates on the development of acidifying mixed‐culture aggregates was studied in a gas‐lift reactor. The glucose concentration was…”
Get full text

Denitrification by sulphur oxidizing Beggiatoa spp. mats on freshwater sediments by Sweerts, Jean-Pierre R. A, Beer, Dirk De, Nielsen, Lars Peter, Verdouw, Henk, den Heuvel, Johannes C. Van, Cohen, Yehuda, Cappenberg, Thomas E

“…Using recently developed microsensors13"15, we showed from oxygen and nitrate microprofiles that oxygen from the water phase was consumed completely in the…”
Get full text

Dynamic Cu/Zn Interaction in SiO 2 Supported Methanol Synthesis Catalysts Unraveled by in Situ XAFS by Grandjean, Didier, Pelipenko, Vladimir, Batyrev, Erdni D., van den Heuvel, Johannes C., Khassin, Alexander A., Yurieva, Tamara. M., Weckhuysen, Bert M.

Get full text

pH and glucose profiles in aggregates of Bacillus laevolacticus by DE BOER, J. P, CRONENBERG, C. C. H, DE BEER, D, VAN DEN HEUVEL, J. C, TEIXEIRA DE MATTOS, M. J, NEIJSSEL, O. M

“…Size distributions and glucose and pH profiles of aggregates of the D-(--)-lactic acid-producing organism Bacillus laevolacticus were measured. The organisms…”
Get full text

Acceleration of mass transfer in methane-producing loop reactors by Van den Heuvel, J C, Vredenbregt, L H, Portegies-Zwart, I, Ottengraf, S P

“…Gas bubbles entrapped in methanogenic granules subjected to hydrostatic pressure oscillations during recirculation in loop reactors will induce intraparticle…”
Get full text

Denitrification by Sulpher Oxidizing Beggiatoa spp. Mats on Freshwater Sediments by Sweerts, Jean-Pierre R A, De Beer, Dirk, Nielsen, Lars Peter, Verdouw, Henk, Van den Heuvel, Johannes C

“…At the surface of sulphide-rich marine and freshwater sediments, the gliding filamentous sulpher bacteria Beggiatoa spp. often grow abundantly to form…”
Get full text

Enhancement of External Mass Transfer by Gaseous End Products by Huisman, Jan W., Van Den Heuvel, Johannes C., Ottengraf, Simon P. P.

“…The conversion rate of biological particles is affected by the mass transfer rate in the particle and the surrounding liquid film. The influence of gas…”
Get full text

Direct measurement of glucose profiles in immobilized yeast gels with a pH-insensitive micro-electrode under anaerobic conditions by Cronenberg, C.C.H, Heuvel, J.C. van den, Ottengraf, S.P.P

“…A 10 mu m glucose sensor was developed based on a glucose oxidase coated Pt-electrode inserted in a capillary shaft. The internal buffer medium effected in a…”
Get full text

Pseudo-steady state oxygen-concentration profiles in an agar slab containing growing Nitrobacter agilis by Wijffels, RenéH., Eekhof, Meinard R., de Beer, Drrk, van den Heuvel, Johannes C., Tramper, Johannes

“…A dynamic model for growth and substrate consumption of immobilized cells is evaluated by comparing experimental and calculated psendo-steady-state…”
Get full text