Searched for: author:"Bouwman, W.G."
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Schmitt, Julien (author), Zeeuw, Jan Joost (author), Zeeuw, Jan Joost (author), Plomp, J. (author), Bouwman, W.G. (author), Washington, Adam L. (author), Duif, C.P. (author), Thijs, M.A. (author), Parnell, S.R. (author)
The initial formation stages of surfactant-templated silica thin films which grow at the air-water interface were studied using combined spin-echo modulated small-angle neutron scattering (SEMSANS) and small-angle neutron scattering (SANS). The films are formed from either a cationic surfactant or nonionic surfactant (C16EO8) in a dilute...
journal article 2020
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Bakker, J.H. (author), Washington, Adam L. (author), Parnell, S.R. (author), van Well, A.A. (author), Pappas, C. (author), Bouwman, W.G. (author)
SESANS data analysis has been implemented in the SasView software package, allowing SESANS experiments to be analyzed using a numerical Hankel transformation of isotropic small-angle scattering (SAS) models. The error of the numerical approximation is three orders of magnitude below typical experimental errors. All advanced data fitting...
journal article 2020
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Nikolaeva, Tatiana (author), Rietkerk, Tim (author), Sein, Arjen (author), Dalgliesh, Robert (author), Bouwman, W.G. (author), Velichko, E. (author), Tian, B. (author), Van As, Henk (author), van Duynhoven, John (author)
Phospholipid gum mesostructures formed in crude soybean oil after water degumming (WD) and enzymatic degumming (ED) were studied at a range of phospholipid and water concentrations. For ED, phospholipase C (PLC), phospholipase A2 (PLA2) and a mixture of phospholipases Purifine 3G (3G) were used. Both WD and ED resulted in lamellar liquid...
journal article 2020
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Tian, B. (author), Wang, Zhaojun (author), de Campo, Liliana (author), Gilbert, Elliot P. (author), Dalgliesh, Robert M. (author), Velichko, E. (author), van der Goot, Atze Jan (author), Bouwman, W.G. (author)
Pronounced fibres are formed through simple shearing of a dense calcium caseinate dispersion. Both mechanical tests and scanning electron microscopy images demonstrate that the material is anisotropic. It is hypothesised that calcium caseinate aggregates, under shear, align into micro-fibres and bundle further into a hierarchical structure....
journal article 2020
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Mulder, Maarten (author), Li, Xuesong X. (author), Nazim, Mohammad M. (author), Dalgliesh, Robert M. (author), Tian, B. (author), Buijse, Marten (author), van Wunnik, John (author), Bouwman, W.G. (author)
Microemulsion systems consisting of D<sub>2</sub>O, an alkane, an anionic internal olefin sulfonate surfactant, salt and secondary butyl alcohol (SBA) as co-solvent are studied in a systematic way. In four different sample sets, either the salt content, SBA content or alkane carbon number was varied in order to study the effects of the...
journal article 2019
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Velichko, E. (author), Tian, B. (author), Nikolaeva, Tatiana (author), Koning, J.R.A. (author), van Duynhoven, John (author), Bouwman, W.G. (author)
A versatile cell for X-ray and neutron scattering experiments on samples under shear has been designed. To our knowledge, it is the first shear cell which can be used for both SAXS and SANS in respectively synchrotron or reactor beamlines. The cell is mainly intended for scattering experiments in so-called “1–2 plane geometry” but can also be...
journal article 2019
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Iashina, Ekaterina G. (author), Filatov, Mikhail V. (author), Pantina, Rimma A. (author), Varfolomeeva, Elena Y. (author), Bouwman, W.G. (author), Duif, C.P. (author), Honecker, Dirk (author), Pipich, Vitaliy (author), Grigoriev, Sergey V. (author)
This paper reports on the two-scale fractal structure of chromatin organization in the nucleus of the HeLa cell. Two neutron scattering methods, small-angle neutron scattering (SANS) and spin-echo SANS, are used to unambiguously identify the large-scale structure as being a logarithmic fractal with the correlation function (r) - ln(r/E). The...
journal article 2019
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Geerits, N. (author), Parnell, S.R. (author), Thijs, M.A. (author), Bouwman, W.G. (author), Plomp, J. (author)
A time of flight MIEZE spectrometerstudyis presented. The instrumentuses solenoid radio frequency(RF)spin flipperswithsquare pole shoes and a magnetic yoke. These flippers can achieve higherstaticfields than conventional resonant RF spin flippers, which employ an air core.High fields are crucial for the construction of a high resolution and...
journal article 2019
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Gaspar, Hugo (author), Santos, Raquel (author), Teixeira, Paulo (author), Hilliou, Loic (author), Weir, Michael P. (author), Duif, C.P. (author), Bouwman, W.G. (author), Parnell, S.R. (author), King, Stephen M. (author)
We investigate the morphological development of polystyrene (PS)-C <sub>60</sub> nanocomposites along the length of a prototype co-rotating twin-screw extruder with sampling capabilities. The effects of C <sub>60</sub> concentration and output on the morphological evolution along the extruder are studied employing a suite of characterization...
journal article 2019
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Tian, B. (author), Garcia Sakai, Victoria (author), Pappas, C. (author), van der Goot, Atze Jan (author), Bouwman, W.G. (author)
We present an investigation of the dynamics of calcium caseinate as a function of hydration, solvent isotope (H<sub>2</sub>O and D<sub>2</sub>O) and drying methods (roller drying and spray drying), using quasi-elastic neutron scattering (QENS). These factors are key to the formation of fibres in this material which makes it a potential...
journal article 2019
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Nikolaeva, T. (author), den Adel, R. (author), Velichko, E. (author), Bouwman, W.G. (author), Hermida-Merino, D. (author), van As, H. (author), Voda, A. (author), van Duynhoven, J (author)
journal article 2018
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van Gruijthuijsen, K. (author), Obiols-Rabasa, M. (author), Schurtenberger, P. (author), Bouwman, W.G. (author), Stradner, A. (author)
journal article 2018
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Tian, B. (author), Wang, Zhaojun (author), van der Goot, Atze Jan (author), Bouwman, W.G. (author)
journal article 2018
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Iashina, E.G. (author), Bouwman, W.G. (author), Duif, C.P. (author), Filatov, M.V. (author), Grigoriev, S. V. (author)
Spin-echo small-angle scattering (SESANS) technique is a method to measure the structure of materials from nano- to micrmeter length scales. This method could be important for studying the packaging of DNA in the eukaryotic cell. We measured the SESANS function from chicken erythrocyte nuclei which is well fitted by the exponential function G...
journal article 2017
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Velichko, E. (author), Buyanov, A.L. (author), Saprykina, N.N. (author), Chetverikov, Yu.O. (author), Duif, C.P. (author), Bouwman, W.G. (author), Smyslov, R.Yu. (author)
Submicron- and micron-scale structures of composite hydrogels based on bacterial cellulose (BC) and polyacrylamide (PAAm) were studied by spin-echo small-angle neutron scattering (SESANS) and cryo-scanning electron microscopy (cryo-SEM). These hydrogels possessing the structure of interpenetrating polymer network were synthesized via free...
journal article 2017
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Gaspar, Hugo (author), Teixeira, Paulo (author), Santos, Raquel (author), Fernandes, Liliana (author), Hilliou, Loic (author), Weir, Michael P. (author), Parnell, Andrew J. (author), Abrams, Kerry J. (author), Hill, Christopher J. (author), Bouwman, W.G. (author), Parnell, S.R. (author), King, Stephen M. (author), Clarke, Nigel (author), Covas, Jose A. (author), Bernardo, Gabriel (author)
We investigated the effect of the feeding formulation (premixed powders of pure components versus solvent-blended mixture) of polystyrene–C60 composites on the dispersion and reagglomeration phenomena developing along the barrel of a twin-screw extruder. The dispersion of C60 in the PS matrix is studied over different length scales using a...
journal article 2017
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Iashina, E.G. (author), Velichko, E. (author), Filatov, M.V. (author), Bouwman, W.G. (author), Duif, C.P. (author), Brulet, A. (author), Grigoriev, S. V. (author)
Small-angle neutron scattering (SANS) on nuclei of chicken erythrocytes demonstrates the cubic dependence of the scattering intensity Q−3 in the range of momentum transfer Q∈10−3–10−2nm−1. Independent spin-echo SANS measurements give the spin-echo function, which is well described by the exponential law in a range of sizes (3×102)–(3×104) nm....
journal article 2017
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Sales, M. (author), Plomp, J. (author), Bouwman, W.G. (author), Tremsin, Anton S. (author), Habicht, Klaus (author), Strobl, Markus (author)
Spin-Echo Modulated Small Angle Neutron Scattering with spatial resolution, i.e. quantitative Spin-Echo Dark Field Imaging, is an emerging technique coupling neutron imaging with spatially resolved quantitative small angle scattering information. However, the currently achieved relatively large modulation periods of the order of millimeters are...
journal article 2017
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Sales, Morten (author), Plomp, J. (author), Habicht, Klaus (author), Tremsin, Anton (author), Bouwman, W.G. (author), Strobl, Markus (author)
Spin-Echo Modulated Small Angle Neutron Scattering (SEMSANS) in Time-of-Flight (ToF) mode has been shown to be a promising technique for measuring (very) small angle neutron scattering (SANS) signals and performing quantitative Dark-Field Imaging (DFI), i.e., SANS with 2D spatial resolution. However, the wavelength dependence of the...
journal article 2016
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De Martin, L. (author), Bouwman, W.G. (author), Van Ommen, J.R. (author)
recent years, the interest in fluidization as a mean to process nanoparticles is strongly increasing. Due to the small size of the nanoparticles, which makes van der Waals forces predominate, they do not fluidize as single particles but as agglomerates. Various researchers using settling experiments and bed expansion measurements conclude that...
conference paper 2013
Searched for: author:"Bouwman, W.G."
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