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Driessen, O. (author), Treuren, L. (author), Moolenaar, A. (author), Meijer, J.W.A. (author), Verheijen, P. (author)Ten mg hydrocortisone (HC) was administered intravenously to a healthy volunteer after a dexamethasone suppresion test and HC concentrations were determined from 1-270 min in plasma, plasma water and on erythrocytes. HC was extracted front erythrocyte concentrates with high efficiency by HC-poor plasma or by human or bovine albyum solutions....journal article 1990
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- Driessen, O. (author), Treuren, L. (author), Moolenaar, A. (author), Meijer, J.W.A. (author), Verheijen, P. (author) journal article 1990
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- Frimout, E.D. (author), Driessen, I.N. (author), Deprettere, E.F. (author) journal article 1992
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- Lupescu, A. (author), Driessen, E.F.C. (author), Roschier, L. (author), Harmans, C.J.P.M. (author), Mooij, J.E. (author) journal article 2006
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Eroms, J. (author), Van Schaarenburg, L.C. (author), Driessen, E.F.C. (author), Plantenberg, J.H. (author), Huizinga, C.M. (author), Schouten, R.N. (author), Verbruggen, A.H. (author), Harmans, C.J.P.M. (author), Mooij, J.E. (author)The authors have studied low-frequency resistance fluctuations in shadow-evaporated Al/AlOx/Al tunnel junctions. Between 300 and 5?K the spectral density follows a 1/f law. Below 5?K, individual defects distort the 1/f shape of the spectrum. The spectral density decreases linearly with temperature between 150 and 1?K and saturates below 0.8?K....journal article 2006
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Driessen, E.F.C. (author), Braakman, F.R. (author), Reiger, E.M. (author), Dorenbos, S.N. (author), Zwiller, V. (author), De Dood, M.J.A. (author)We measured the single-photon detection efficiency of NbN superconducting single-photon detectors as a function of the polarization state of the incident light for different wavelengths in the range from 488 nm to 1550 nm. The polarization contrast varies from ?5% at 488 nm to ?30% at 1550 nm, in good agreement with numerical calculations. We...journal article 2009
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Männik, J. (author), Driessen, R. (author), Galajda, P. (author), Keymer, J.E. (author), Dekker, C. (author)In many naturally occurring habitats, bacteria live in micrometer-size confined spaces. Although bacterial growth and motility in such constrictions is of great interest to fields as varied as soil microbiology, water purification, and biomedical research, quantitative studies of the effects of confinement on bacteria have been limited. Here, we...journal article 2009
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Lupa?cu, A. (author), Bertet, P. (author), Driessen, E.F.C. (author), Harmans, C.J.P.M. (author), Mooij, J.E. (author)We observed the dynamics of a superconducting flux qubit coupled to an extrinsic quantum system (EQS). The presence of the EQS is revealed by an anticrossing in the spectroscopy of the qubit. The excitation of a two-photon transition to the third excited state of the qubit-EQS system allows us to extract detailed information about the energy...journal article 2009
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Kovalchuk, A. (author), Driessen, A.J.M. (author)Background: The superfamily of ABC proteins is among the largest known in nature. Its members are mainly, but not exclusively, involved in the transport of a broad range of substrates across biological membranes. Many contribute to multidrug resistance in microbial pathogens and cancer cells. The diversity of ABC proteins in fungi is comparable...journal article 2010
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Fasoula, A. (author), Driessen, H. (author), Van Genderen, P. (author)Taking into account sparsity of the reflectivity function of several radar targets of interest, efficient low-complexity automatic target recognition (ATR) systems can be designed. Such ATR systems would be based on two-dimensional (2D) spatial target models of low dimensionality, where critical information on the radar target signature is...journal article 2010
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Daran, J.M. (author), Pronk, J.T. (author), Driessen, A.J.M. (author), Nijland, J.G. (author), Lamboo, F. (author), Puig-Martinez, M. (author), Veiga, T. (author), Gombert, A.K. (author)Penicillium chrysogenum is widely used as an industrial antibiotic producer, in particular in the synthesis of ß-lactam antibiotics such as penicillins and cephalosporins. In industrial processes, oxalic acid formation leads to reduced product yields. Moreover, precipitation of calcium oxalate complicates product recovery. We observed oxalate...journal article 2011
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Van Ledden, M. (author), Driessen, T. (author), Groot Zwaaftink, M. (author)Afgelopen voorjaar was sprake van een bijzonder hoogwater op de Mississippi. De rivier voerde op haar hoogtepunt in totaal meer dan 65.000 kubieke meter per seconde af naar de Golf van Mexico, ongeveer vier keer zoveel als de 1/1.250 jaar ontwerpafvoer van de Rijn in Nederland, en overtrof op sommige plaatsen het historische hoogwater van 1927....journal article 2011
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Veiga, T. (author), Gombert, A.K. (author), Landes, N. (author), Verhoeven, M.D. (author), Kiel, J.A.K.W. (author), Krikken, A. (author), Nijland, J.G. (author), Touw, H. (author), Luttik, M.A.H. (author), Van der Toorn, J.C. (author), Driessen, A.J.M. (author), Bovenberg, R.A.L. (author), Van den Berg, M.A. (author), Van der Klei, I.J. (author), Pronk, J.T. (author), Daran, J.M. (author)Industrial production of semi-synthetic cephalosporins by Penicillium chrysogenum requires supplementation of the growth media with the side-chain precursor adipic acid. In glucose-limited chemostat cultures of P. chrysogenum, up to 88% of the consumed adipic acid was not recovered in cephalosporin-related products, but used as an additional...journal article 2012
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Veiga, T. (author), Nijland, J.G. (author), Driessen, A.J.M. (author), Bovenberg, R.A.L. (author), Touw, H. (author), Van den Berg, M.A. (author), Pronk, J.T. (author), Daran, J.M. (author)The multicomponent global regulator Velvet complex has been identified as a key regulator of secondary metabolite production in Aspergillus and Penicillium species. Previous work indicated a massive impact of PcvelA and PclaeA deletions on penicillin production in prolonged batch cultures of P. chrysogenum, as well as substantial changes in...journal article 2012
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Hortensius, H.L. (author), Driessen, E.F.C. (author), Klapwijk, T.M. (author), Berggren, K.K. (author), Clem, J.R. (author)We demonstrate experimentally that the critical current in superconducting NbTiN wires is dependent on their geometrical shape, due to current-crowding effects. Geometric patterns such as 90? corners and sudden expansions of wire width are shown to result in the reduction of critical currents. The results are relevant for single-photon detectors...journal article 2012
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Hortensius, H.L. (author), Öztürk, A. (author), Zeng, P. (author), Driessen, E.F.C. (author), Klapwijk, T.M. (author)Antenna-coupled suspended single carbon nanotubes exposed to 108?GHz microwave radiation are shown to be selectively heated with respect to their metal contacts. This leads to an increase in the conductance as well as to the development of a power-dependent DC voltage. The increased conductance stems from the temperature dependence of tunneling...journal article 2012
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Driessen, E.F.C. (author), Coumou, P.C.J.J. (author), Tromp, R.R. (author), De Visser, P.J. (author), Klapwijk, T.M. (author)We probe the effects of strong disorder (2.4<kFl<8.6) on superconductivity in thin films of niobium titanium nitride and titanium nitride by measuring the microwave electrodynamics in coplanar waveguide resonators. We find a gradual evolution of the electromagnetic response with disorder, deviating from BCS theory, for both materials. This...journal article 2012
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Van de Meer, W.G.J. (author), Driessen, J. (author), De Moel, P.J. (author)Samen met Vitens werkt TU Delft aan de ontwikkeling van PHREEQC voor de modellering van waterchemie in drinkwater (zie H2O nr. 3, pag. 34-36). Op een symposium werden onlangs diverse onderdelen ervan gepresenteerd. In totaal 58 deelnemers en 16 sprekers kwamen hiervoor naar Delft.journal article 2012
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Brakenhoff, D. (author), Seip, H. (author), Jonkman, S.N. (author), Driessen, T.L.A. (author)Tijdens de overstromingen in Thailand in 2011 werd het Baan Hollanda Museum, gelegen bij een oude VOC-handelspost, getroffen. De Nederlandse ambassade vroeg de TU Delft een plan uit te werken on Baan Hollanda in de toekomst droog te houden.journal article 2013
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Groot, S. (author), Harmanny, R. (author), Driessen, H. (author), Yarovoy, A. (author)In this article, a novel motion model-based particle filter implementation is proposed to classify human motion and to estimate key state variables, such as motion type, i.e. running or walking, and the subject’s height. Micro-Doppler spectrum is used as the observable information. The system and measurement models of human movements are built...journal article 2013