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Becqué, Yvonne N. (author), van der Wel, Maaike (author), Aktan-Arslan, Muzeyyen (author), Driel, Anne Geert van (author), Rietjens, J.A.C. (author), van der Heide, Agnes (author), Witkamp, Erica (author)
Objective: Family caregivers are often intensively involved in palliative and end-of-life cancer care. A variety of interventions to support family caregivers have been developed, differing in target population, modality, and components. We aimed to systematically examine characteristics and the effectiveness of interventions to support...
review 2023
document
Suresh Kumar, P. (author), Korving, Leon (author), van Loosdrecht, Mark C.M. (author), Witkamp, G.J. (author)
Eutrophication and the resulting formation of harmful algal blooms (HAB) causes huge economic and environmental damages. Phosphorus (P) from sewage effluent and agricultural run-off has been identified as a major cause for eutrophication. Phosphorous concentrations greater than 100 μg P/L are usually considered high enough to cause...
review 2019
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Witkamp, G. (author), Geelen, V.M. (author)
Document uit de collectie Chemische Procestechnologie
report 1985
document
Witkamp, G.J. (author), Van Spronsen, J. (author), Hasselaar, M. (author)
The invention is directed to a process for the treatment of an aqueous solution comprising sodium carbonate and/or sodium bicarbonate and sodium molybdate, said process comprising freeze crystallising the solution at the eutectic freezing point thereof and recovering substantially pure ice crystals, substantially pure sodium carbonate and/or...
patent 2008
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Meijer, J.A.M. (author), Geertman, R.M. (author), Oosterhof, H. (author), Witkamp, G.J. (author), Van Rosmalen, G.M. (author)
A process is presented in which anhydrous soda is crystallized and worked up to produce anhydrous soda crystals with a bulk density from 1300 to 1600 kg/m<3>. The process is characterized in that a solvent is used that allows the crystals to be formed and handled at atomspheric pressure in the presence of water without the monohydrate of soda...
patent 1999
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Oosterhof, H. (author), Van Rosmalen, G.M. (author), Witkamp, G.J. (author), De Graauw, J. (author)
The invention is directed to a process for the production of sodium carbonate-anhydrate having a bulk density of at least 800 kg/m<3>, said process comprising: providing a suspension of solid sodium carbonate and/or solid sodium bicarbonate and/or solid double salts at least comprising one of sodium carbonate and sodium bicarbonate, in a mixture...
patent 2000
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Golubovic, M. (author), Ottens, M. (author), Witkamp, G.J. (author), Van der Wielen, L.A. (author)
The invention relates to a method of preparing a protein aggregate, wherein an aqueous protein solution is acidified with a pH that lies above the isoelectric point of the protein. In accordance with the invention, a first protein, which through acidificaiton is able to form a protein aggregate, is acidified in the presence of a second protein...
patent 2005
document
Van Spronsen, J. (author), Witkamp, G.J. (author)
The invention is directed to a process for the recovery or removal of one or more crystallizable compounds from an aqueous solution containing, apart from the said crystallizable compounds, one or more organic or inorganic scale- forming or scale-inducing materials having a lower solubility in water than the said crystallizable compounds, said...
patent 2013
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Koopman, C. (author), Witkamp, G.J. (author)
Rod-shaped ion exchanger comprises a metal wire core surrounded by an ion-exchange resin. Independent claims are also included for: (1) a module comprising a housing with an inlet and outlet and one or more ion exchangers as above; (2) a process for producing an ion exchanger as above, comprising inserting a metal wire into a mold, filling the...
patent 2002
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Van Spronsen, J. (author), Witkamp, G.J. (author)
patent 2013
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De Jong, W. (author), Tavares Cardoso, M.A. (author), Van Spronsen, J. (author), Witkamp, G.J. (author)
The invention is directed to a process for the treatment of lignocellulosic biomass to recover one or more components or derivatives of components thereof, said process comprising treating said biomass at a temperature of at least 75 DEG C in a mixture of an ionic liquid and an organic acid, thereby producing a treatment mixture containing...
patent 2011
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Hofland, G.W. (author), Van der Wielen, L.A. (author), Witkamp, G.J. (author)
The invention relates to a method for the preparation of protein agglomerates, by introducing CO2 in an aqueous protein-containing solution. According to the invention CO2 is gradually and while mixing supplied yielding spherical protein agglomerates, after which the pressure is reduced with a rate such that the spherical nature of the protein...
patent 2001
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Witkamp, G.J. (author), Vrijenhoef, J.P. (author), De Graauw, J. (author), Van der Ham, F. (author)
The invention is directed to a process for recovering a crystalline material from an aqueous solution, which solution also contains organic contaminants, in which process the material is crystallised from the aqueous solution by freeze crystallising at a eutectic freezing point of the solution.
patent 2001
document
Witkamp, G.J. (author), Van Spronsen, J. (author), Hasselaar, M. (author)
The present invention is in the area of the treatment of a gas flow containing carbon dioxide obtained from burning at least one organic waste or feed stream, on the one hand to produce sodium bicarbonate and optionally remove and/or recover molybdenum compounds and/or other impurities from the said waste streams for further use and on the other...
patent 2012
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Van Spronsen, J. (author), Witkamp, G.J. (author), Hollman, F. (author), Choi, Y.H. (author), Verpoorte, R. (author)
The invention is directed to a process for extracting materials from biological material, which process is characterized in that the naturally occurring biological material is treated with an extractant consisting of a deep eutectic solvent of natural origin or a an ionic liquid of natural origin to produce a biological extract of natural origin...
patent 2011
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Van Spronsen, J. (author), Witkamp, G.J. (author), Evers, J.A. (author), De Graaff, B. (author), Van Kaathoven, H. (author)
patent 2014
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Kroon, M.C. (author), Shariati, A. (author), Florusse, L.J. (author), Peters, C.J. (author), Van Spronsen, J. (author), Witkamp, G.J. (author), Sheldon, R.A. (author), Gutkowski, K.I. (author)
The invention is directed to a process for carrying out a chemical reaction in an ionic liquid as solvent and CO2 as cosolvent, in which process reactants are reacted in a homogeneous phase at selected pressure and temperature to generate a reaction product at least containing an end-product of the reaction, and upon completion of the reaction a...
patent 2006
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Hüttel, A.K. (author), Poot, M. (author), Witkamp, B. (author), Van Der Zant, H.S.J. (author)
journal article 2008
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Witkamp, B. (author), Poot, M. (author), Pathangi, H. (author), Hüttel, A.K. (author), Van der Zant, H.S.J. (author)
We have fabricated suspended metal paddle resonators with carbon nanotubes functioning as self-detecting torsional springs. We observe gate-tunable resonances that either tune to higher or to lower frequencies when increasing the dc voltage on the back gate. We attribute the former modes to flexural vibrations of the paddle resonator, while the...
journal article 2008
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Dawes, G.J.S. (author), Fratila-Apachitei, L.E. (author), Necula, B.S. (author), Apachitei, I. (author), Witkamp, G.J. (author), Duszczyk, J. (author)
The aim of the present study was to investigate the morphology and function of a drug eluting metallic porous surface produced by the immobilization of poly lactide-co-glycolide microspheres bearing dexamethasone onto plasma electrolytically oxidized Ti–6Al–7Nb medical alloy. Spheres of 20 µm diameter were produced by an oilin-water emulsion...
journal article 2009
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