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Kortenbout, A.J. (author), Costerus, Sophie (author), Dudink, Jeroen (author), de Jong, N. (author), de Graaff, Jurgen C. (author), Vos, H.J. (author), Bosch, Johan G. (author)
Objective: Post-operative brain injury in neonates may result from disturbed cerebral perfusion, but accurate peri-operative monitoring is lacking. High-frame-rate (HFR) cerebral ultrasound could visualize and quantify flow in all detectable vessels using spectral Doppler; however, automated quantification in small vessels is challenging...
journal article 2024
document
van Zadelhoff, Arjan C. (author), Poppe, Jarinda A. (author), Willemsen, Sten (author), Mauff, Katya (author), van Weteringen, Willem (author), Goos, T.G. (author), Reiss, Irwin K.M. (author), Vermeulen, Marijn J. (author), de Graaff, Jurgen C. (author)
Background: Arterial pressure measurements are important to monitor vital function in neonates, and values are known to be dependent of gestational and postnatal age. Current reference ranges for mean arterial pressure in neonates have been derived from small samples and combined data of noninvasive and invasive measurements. We aimed to...
journal article 2023
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de Graaff, D.R. (author)
Increase in sea level will lead to an increase in salinity in domestic wastewater systems. In order to anticipate its effects on biological wastewater treatment, the impact has to be assessed with lab-scale experiments. Aerobic granular sludge (AGS) is a successful technology for simultaneous removal of organic carbon (COD), nitrogen, and...
doctoral thesis 2020
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de Graaff, D.R. (author), van Loosdrecht, Mark C.M. (author), Pronk, M. (author)
Many sources of wastewater contain sulfides, which can cause excessive growth of filamentous bacteria such as Thiothrix sp. resulting in bulking sludge in conventional activated sludge systems. Granular sludge systems could potentially also suffer from the growth of filamentous bacteria. Uptake of easily degradable COD by the relatively slow...
journal article 2020
document
Feng, Cuijie (author), Welles, L. (author), Zhang, X. (author), Pronk, M. (author), de Graaff, D.R. (author), van Loosdrecht, Mark C.M. (author)
Phosphorus has been successfully eliminated from wastewater by biological techniques of enhanced biological phosphorus removal (EBPR) process, which relies on a specific microbiota of polyphosphate accumulating organisms (PAOs) that accumulate phosphate as polyphosphates (poly-P). Most methods for quantification of poly-P pools suffer from...
journal article 2020
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de Graaff, D.R. (author), van Loosdrecht, Mark C.M. (author), Pronk, M. (author)
Seawater can be introduced or intrude in sewer systems and can thereby negatively influence biological wastewater treatment processes. Here we studied the impact of artificial seawater on the enhanced biological phosphate removal (EBPR) process performance by aerobic granular sludge (AGS) with synthetic wastewater. Process performance,...
journal article 2020
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de Graaff, D.R. (author), van Loosdrecht, Mark C.M. (author), Pronk, M. (author)
Abstract: Candidatus Accumulibacter phosphatis is an important microorganism for enhanced biological phosphorus removal (EBPR). In a previous study, we found a remarkable flexibility regarding salinity, since this same microorganism could thrive in both freshwater- and seawater-based environments, but the mechanism for the tolerance to saline...
journal article 2020
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Cipriani, A. (author), de Graaff, Jan (author), Ruszel, W.M. (author)
In this paper we investigate scaling limits of the odometer in divisible sandpiles on d-dimensional tori following up the works of Chiarini et al. (Odometer of long-range sandpiles in the torus: mean behaviour and scaling limits, 2018), Cipriani et al. (Probab Theory Relat Fields 172:829–868, 2017; Stoch Process Appl 128(9):3054–3081, 2018)....
journal article 2019
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de Graaff, D.R. (author), Felz, S. (author), Neu, Thomas R. (author), Pronk, M. (author), van Loosdrecht, Mark C.M. (author), Lin, Y. (author)
Sialic acids have been discovered in the extracellular polymeric substances (EPS) of seawater-adapted aerobic granular sludge (AGS). Sialic acids are a group of monosaccharides with a nine-carbon backbone, commonly found in mammalian cells and pathogenic bacteria, and frequently described to protect EPS molecules and cells from attack by...
journal article 2019
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de Graaff, D.R. (author), van Dijk, E.J.H. (author), van Loosdrecht, Mark C.M. (author), Pronk, M. (author)
For a stable operation, the aerobic granular sludge process requires mechanically strong granules in balance with the shear forces in the reactor. Despite a wide general interest in granular stability, the mechanical strength of both anaerobic and aerobic granular sludge received very little attention. In this study, a high-shear method for...
journal article 2018
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de Graaff, R.M.T. (author)
doctoral thesis 2012
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de Graaff, R.M.T. (author)
doctoral thesis 2012
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de Graaff, R.M.T. (author)
report 2012
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de Graaff, R.M.T. (author)
report 2011
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van der Heijden, M.P. (author), de Graaff, H.C. (author), de Vreede, L.C.N. (author)
journal article 2002
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van der Heijden, M.P. (author), de Graaff, H.C. (author), de Vreede, L.C.N. (author), Gajadharsing, J.R. (author), Burghartz, J.N. (author)
journal article 2002
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de Vreede, L.C.N. (author), de Graaff, H.C. (author), Willemen, J.A. (author), van Noort, W. (author), Jos, R. (author), Larson, L.E. (author), Slotboom, J.W. (author), Tauritz, J.L. (author)
journal article 1999
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de Graaff, A.W.J. (author)
master thesis 1999
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de Graaff, A.W.J. (author)
master thesis 1999
document
de Graaff, A.W.J. (author)
report 1999
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