Search results | TU Delft Repositories

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Efficient water reduction with gallium phosphide nanowires

Standing, A. (author), Assali, S. (author), Gao, L. (author), Verheijen, M.A. (author), Van Dam, D. (author), Cui, Y. (author), Notten, P.H.L. (author), Haverkort, J.E.M. (author), Bakkers, E.P.A.M. (author)

Photoelectrochemical hydrogen production from solar energy and water offers a clean and sustainable fuel option for the future. Planar III/V material systems have shown the highest efficiencies, but are expensive. By moving to the nanowire regime the demand on material quantity is reduced, and new materials can be uncovered, such as wurtzite...

journal article 2015

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Simulation based decision support for strategic communication and marketing management concerning the consumer introduction of smart energy meters

Van der Sanden, M.C.A. (author), Van Dam, K.H. (author), Stragier, J. (author), Kobus, C.B.A. (author)

Communication and marketing professionals make strategic decisions in highly complex and dynamic contexts. These decisions are highly uncertain on the outcome and process level when, for example, consumer behaviour is at stake. Decision support systems can provide insights in these levels of uncertainty and the professional process of decision...

journal article 2013

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Biomaterials

Van Mourik, P. (author), Van Dam, J. (author), Picken, S.J. (author), Ursem, B. (author)

The metabolic pathways of living organisms produce biomaterials. Hence, in principle biomaterials are fully sustainable. This does not mean that their processing and application have no impact on the environment, e.g. the recycling of natural rubber remains a problem. Biomaterials are applied in a wide range of consumer products, varying from...

book chapter 2013

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Quantitative metabolomics analysis of amino acid metabolism in recombinant Pichia pastoris under different oxygen availability conditions

Carnicer, M. (author), Ten Pierick, A. (author), Van Dam, J. (author), Heijnen, J.J. (author), Albiol, J. (author), Van Gulik, W. (author), Ferrer, P. (author)

Background: Environmental and intrinsic stress factors can result in the global alteration of yeast physiology, as evidenced by several transcriptional studies. Hypoxia has been shown to have a beneficial effect on the expression of recombinant proteins in Pichia pastoris growing on glucose. Furthermore, transcriptional profiling analyses...

journal article 2012

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Galacturonic Acid Inhibits the Growth of Saccharomyces cerevisiae on Galactose, Xylose, and Arabinose

Huisjes, E.H. (author), De Hulster, E. (author), Van Dam, J.C. (author), Pronk, J.T. (author), Van Maris, A.J.A. (author)

The efficient fermentation of mixed substrates is essential for the microbial conversion of second-generation feedstocks, including pectin-rich waste streams such as citrus peel and sugar beet pulp. Galacturonic acid is a major constituent of hydrolysates of these pectin-rich materials. The yeast Saccharomyces cerevisiae, the main producer of...

journal article 2012

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Monolithic scintillators and SiPMs in time-of-flight PET detectors

Van Dam, H.T. (author)

Positron emission tomography (PET) is one of the key medical imaging modalities in the diagnosis and staging of e.g. cancer and cardiovascular diseases. The image formation is based on the measurement of annihilation photon pairs in the detector ring of the PET scanner. The diagnostic value of a PET image depends crucially on the image quality,...

doctoral thesis 2012

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Development of quantitative metabolomics for Pichia pastoris

Carnicer,, M. (author), Canelas, A.B. (author), Ten Pierick, A. (author), Zeng, Z. (author), Van Dam, J. (author), Albiol, J. (author), Ferrer, P. (author), Heijnen, J.J. (author), Van Gulik, W. (author)

Accurate, reliable and reproducible measurement of intracellular metabolite levels has become important for metabolic studies of microbial cell factories. A first critical step for metabolomic studies is the establishment of an adequate quenching and washing protocol, which ensures effective arrest of all metabolic activity and removal of...

journal article 2011

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A Comprehensive Model of the Response of Silicon Photomultipliers

Van Dam, H.T. (author), Seifert, S. (author), Vinke, R. (author), Dendooven, P. (author), Löhner, H. (author), Beekman, F.J. (author), Schaart, D.R. (author)

The response of a silicon photomultiplier (SiPM) to optical signals is inherently nonproportional due to saturation, afterpulsing, and crosstalk. Existing models of the SiPM response do not account for all of these effects, and therefore, these models are not sufficiently accurate for many applications. In this work, a comprehensive model of the...

journal article 2010

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LaBr3:Ce and SiPMs for time-of-flight PET: Achieving 100 ps coincidence resolving time

Schaart, D.R. (author), Seifert, S. (author), Vinke, R. (author), Van Dam, H.T. (author), Dendooven, P. (author), Löhner, H. (author), Beekman, F.J. (author)

The use of time-of-flight (TOF) information in positron emission tomography (PET) enables significant improvement in image noise properties and, therefore, lesion detection. Silicon photomultipliers (SiPMs) are solid-state photosensors that have several advantages over photomultiplier tubes (PMTs). SiPMs are small, essentially transparent to 511...

journal article 2010

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Simulation of silicon photomultiplier signals

Seifert, S. (author), Van Dam, H.T. (author), Huizenga, J. (author), Vinke, R. (author), Dendooven, P. (author), Löhner, H. (author), Schaart, D.R. (author)

In a silicon photomultiplier (SiPM), also referred to as multi-pixel photon counter (MPPC), many Geiger-mode avalanche photodiodes (GM-APDs) are connected in parallel so as to combine the photon counting capabilities of each of these so-called microcells into a proportional light sensor. The discharge of a single microcell is relatively well...

journal article 2009

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A novel, SiPM-array-based, monolithic scintillator detector for PET

Schaart, D.R. (author), Van Dam, H.T. (author), Seifert, S. (author), Vinke, R. (author), Dendooven, P. (author), Löhner, H. (author), Beekman, F.J. (author)

Silicon photomultipliers (SiPMs) are of great interest to positron emission tomography (PET), as they enable new detector geometries, for e.g., depth-of-interaction (DOI) determination, are MR compatible, and offer faster response and higher gain than other solid-state photosensors such as avalanche photodiodes. Here we present a novel detector...

journal article 2009

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Leakage-free rapid quenching technique for yeast metabolomics

Canelas, A.B. (author), Ras, C. (author), Ten Pierick, A. (author), Van Dam, J.C. (author), Heijnen, J.J. (author), Van Gulik, W.M. (author)

Accurate determination of intracellular metabolite levels requires reliable, reproducible techniques for sampling and sample treatment. Quenching in 60% (v/v) methanol at ?40°C is currently the standard method for sub-second arrest of metabolic activity in microbial metabolomics but there have been contradictory reports in the literature on...

journal article 2008

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Signal to Noise Ratio of APD-Based Monolithic Scintillator Detectors for High Resolution PET

Maas, M. (author), Schaart, D.R. (author), Van der Laan, D.J. (author), Van Dam, T. (author), Huizenga, J. (author), Brouwer, J.C. (author), Bruyndonckx, P. (author), Lemaitre, C. (author), Van Eijk, C.W.E. (author)

journal article 2008

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Application of adjoint Monte Carlo to accelerate simulations of mono-directional beams in treatment planning for Boron Neutron Capture Therapy

Nievaart, V.A. (author), Legrady, D. (author), Moss, R.L. (author), Kloosterman, J.L. (author), Van der Hagen, T.H. (author), Van Dam, H. (author)

This paper deals with the application of the adjoint transport theory in order to optimize Monte Carlo based radiotherapy treatment planning. The technique is applied to Boron Neutron Capture Therapy where most often mixed beams of neutrons and gammas are involved. In normal forward Monte Carlo simulations the particles start at a source and...

journal article 2007

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Quantum transport in semiconductor nanowires

Van Dam, J. (author)

This thesis describes a series of experiments aimed at understanding the low-temperature electrical transport properties of semiconductor nanowires. The semiconductor nanowires (1-100 nm in diameter) are grown from nanoscale gold particles via a chemical process called vapor-liquid-solid (VLS) growth. The huge versatility of this material system...

doctoral thesis 2006

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Single-electron tunneling in InP nanowires

De Franceschi, S. (author), Van Dam, J.A. (author), Bakkers, E.P.A.M. (author), Feiner, L.F. (author), Gurevich, L. (author), Kouwenhoven, P. (author)

We report on the fabrication and electrical characterization of field-effect devices based on wire-shaped InP crystals grown from Au catalyst particles by a vapor–liquid–solid process. Our InP wires are n-type doped with diameters in the 40–55-nm range and lengths of several micrometers. After being deposited on an oxidized Si substrate, wires...

journal article 2003

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Waterstofproductie met autotherme reactor

Veenman, J.W. (author), Van Dam, M. (author)

Document(en) uit de collectie Chemische Procestechnologie

report 1990

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Carbon supported noble metal catalysts in the oxidation of glucose 1-phosphate and related alcohols

Van Dam, H.E. (author)

doctoral thesis 1989

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Preparation of D-xylulose from D-xylose: Enzyme and Microbial Technology