C
Cees Veeger
Researcher at Wageningen University and Research Centre
Publications - 136
Citations - 6177
Cees Veeger is an academic researcher from Wageningen University and Research Centre. The author has contributed to research in topics: Azotobacter vinelandii & Nitrogenase. The author has an hindex of 41, co-authored 136 publications receiving 6085 citations. Previous affiliations of Cees Veeger include University of Lübeck & Delft University of Technology.
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Rules for optimization of biocatalysis in organic solvents
TL;DR: General rules for the optimization of different biocatalytic systems in various types of media containing organic solvents are derived by combining data from the literature, and the logarithm of the partition coefficient, log P, as a quantitative measure of solvent polarity.
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Separation of hydrogenase from intact cells of Desulfovibrio vulgaris. Purification and properties.
TL;DR: In most of the purification procedures that have been described the bacteria were broken mechanically, and in the case of the Miyazaki strain, a subsequent treatment with pancreatin or trypsin was found to be required to solubilize the enzyme.
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Redox properties of the iron‐sulfur clusters in activated Fe‐hydrogenase from Desulfovibrio vulgaris (Hildenborough)
Antonio J. Pierik,Wilfred R. Hagen,Jan S. Redeker,Ronnie B. G. Wolbert,Marelle G. Boersma,Marc F. J. M. Verhagen,Hans J. Grande,Cees Veeger,Peter H. A. Mutsaers,Richard H. Sands,W.Richard Dunham +10 more
TL;DR: Combined elemental analysis by proton-induced X-ray emission, inductively coupled plasma mass spectrometry, instrumental neutron activation analysis, atomic absorption spectroscopy and colorimetry establishes that elements with Z > 21 (except for 12-15 Fe) are present in 0.001-0.1 mol/mol quantities, not correlating with activity.
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Short-term effect of ammonium chloride on nitrogen fixation by Azotobacter vinelandii and by bacteroids of Rhizobium leguminosarum.
TL;DR: It is presented that the direct depressing effect of ammonium chloride on nitrogen fixation by Azotobacter vinelandii is due to inhibition of the electron transport system to nitrogenase, and its significance as a regulator for the rapid ‘switch off/switch on’ of nitrogenase activity is discussed.
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Rules for the regulation of enzyme activity in reserved micelles as illustrated by the conversion of apolar steroids by 20β-hydroxysteroid dehydrogenase
TL;DR: For any given apolar compound, a medium can be composed that gives optimal enzymatic reduction of the apolar steroids progesterone and prednisone by varying the water content, concentration of hexanol and type of organic solvent.