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Author  |
De Tommasi, E.; Gielis, J.; Rogato, A. |
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Title |
Diatom frustule morphogenesis and function : a multidisciplinary survey |
Type |
A1 Journal article |
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Year |
2017 |
Publication |
Marine Genomics |
Abbreviated Journal |
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Volume |
35 |
Issue |
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Pages |
1-18 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
Diatoms represent the major component of phytoplankton and are responsible for about 2025% of global primary production. Hundreds of millions of years of evolution led to tens of thousands of species differing in dimensions and morphologies. In particular, diatom porous silica cell walls, the frustules, are characterized by an extraordinary, species-specific diversity. It is of great interest, among the marine biologists and geneticists community, to shed light on the origin and evolutionary advantage of this variability of dimensions, geometries and pore distributions. In the present article the main reported data related to frustule morphogenesis and functionalities with contributions from fundamental biology, genetics, mathematics, geometry and physics are reviewed. |
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000412957700001 |
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2017-07-20 |
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1874-7787 |
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UA library record; WoS full record; WoS citing articles |
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no |
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Call Number |
UA @ admin @ c:irua:144546 |
Serial |
7807 |
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Author |
De Schepper, V.C.J.; Holvoet, K.M.A.; Benedetti, L.; Seuntjens, P.; Vanrolleghem, P.A. |
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Title |
Extension of the river water quality model no. 1 with the fate of pesticides |
Type |
A1 Journal article |
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Year |
2012 |
Publication |
Journal of hydroinformatics |
Abbreviated Journal |
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Volume |
14 |
Issue |
1 |
Pages |
48-64 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
The existing River Water Quality Model No. 1 (RWQM1) was extended with processes determining the fate of non-volatile pesticides in the water phase and sediments. The exchange of pesticides between the water column and the sediment is described by three transport processes: diffusion, sedimentation and resuspension. Burial of sediments is also included. The modified model was used to simulate the concentrations of diuron and chloridazon in the river Nil. A good agreement was found between the simulated pesticide concentrations and measured values resulting from a four-month intensive monitoring campaign. The simulation results indicate that pesticide concentrations in the bulk water are not sensitive to the selected biochemical model parameters. it seems that these concentrations are mainly determined by the imposed upstream concentrations, run-off and direct losses. The high concentrations in the bulk water were not observed in the sediment pore water due to a limited exchange between the water column and the sediment. According to a sensitivity analysis, the observed pesticide concentrations are highly sensitive to the diffusion and sorption coefficients. Therefore, model users should determine these parameters with accuracy in order to reduce the degree of uncertainty in their results. |
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000298618300004 |
Publication Date |
2011-10-25 |
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ISSN |
1464-7141 |
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UA library record; WoS full record; WoS citing articles |
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no |
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Call Number |
UA @ admin @ c:irua:96257 |
Serial |
7954 |
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Author |
De Schepper, E.; Van Passel, S.; Lizin, S.; Vincent, T.; Martin, B.; Gandibleux, X. |
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Title |
Economic and environmental multi-objective optimization to evaluate the impact of Belgian policy on solar power and electric vehicles |
Type |
A1 Journal article |
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Year |
2016 |
Publication |
Journal of environmental economics and policy |
Abbreviated Journal |
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Volume |
5 |
Issue |
1 |
Pages |
1-27 |
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Keywords |
A1 Journal article; Economics; Engineering Management (ENM) |
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Abstract |
This research uses multi-objective optimisation to determine the optimal mixture of energy and transportation technologies, while optimising economic and environmental impacts. We demonstrate the added value of using multi-objective mixed integer linear programming (MOMILP) considering economies of scale versus using continuous multi-objective linear programming assuming average cost intervals. This paper uses an improved version to solve MOMILPs exactly. To differentiate optimal solutions with and without subsidies, the impact of policy on the Pareto frontier is assessed. We distinguish between minimising economic life cycle costs (complete rationality) and required investments (bounded rationality). The approach is illustrated using a Belgian company with demands for electricity and transport. Electricity technologies are solar photovoltaics and the grid; transportation includes internal combustion engine vehicles, grid powered battery electric vehicles (BEVs), and solar-powered BEVs. The impact of grid powered BEVs to reduce GHG emissions is limited, yet they are less costly than solar panels to decrease emissions. Current policy measures are found to be properly targeting rational investors who consider life cycle costs, while private (potentially bounded rational) investors often focus on required investments only. |
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Publication Date |
2015-03-12 |
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ISSN |
2160-6544 |
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UA library record |
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Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:136756 |
Serial |
6186 |
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Author |
de Raedt, I.; Vekemans, B.; Janssens, K.; Adams, F. |
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Title |
Synchrotron light through ancient glass |
Type |
A3 Journal article |
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Year |
2000 |
Publication |
Europhysics news |
Abbreviated Journal |
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Volume |
31 |
Issue |
6 |
Pages |
15 |
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Keywords |
A3 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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ISSN |
0531-7479 |
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Approved |
Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:31697 |
Serial |
5863 |
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Author |
de Raedt, I.; Janssens, K.; Veeckman, J.; Adriaens, A.; Adams, F. |
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Title |
Glass trade in Antwerp during the 15th through 17th century |
Type |
H3 Book chapter |
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Year |
2000 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
38-44 |
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Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:27860 |
Serial |
5634 |
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Author |
de Raedt, I.; Janssens, K.; Veeckman, J.; Adams, F. |
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Title |
Composition of facon-de-venise and Venetian glass from Antwerp and the Southern Netherlands |
Type |
H3 Book chapter |
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Year |
2000 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
346-350 |
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Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:27699 |
Serial |
5542 |
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Author |
de Raedt, I.; Janssens, K.; Veeckman, J.; Adams, F. |
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Title |
Samenstelling van 15de- tot 17de-eeuwse glazen voorwerpen opgegraven in Antwerpen |
Type |
H3 Book chapter |
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Year |
1998 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
89-110 |
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Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:19318 |
Serial |
5823 |
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Author |
de Raedt, I.; Janssens, K.; Veeckman, J.; Adams, F. |
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Title |
Samenstelling van 15de- tot 17de-eeuwse glazen voorwerpen opgegraven in Antwerpen: deel 1 |
Type |
A3 Journal article |
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Year |
1998 |
Publication |
Journaal van de Belgische Vereniging voor Glastechnieken |
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Issue |
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Pages |
9-17 |
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Keywords |
A3 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:24908 |
Serial |
5824 |
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Author |
de Raedt, I.; Janssens, K.; Veeckman, J.; Adams, F. |
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Title |
Samenstelling van 15de- tot 17de-eeuwse glazen voorwerpen opgegraven in Antwerpen: deel 2 |
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A3 Journal article |
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1998 |
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Journaal van de Belgische Vereniging voor Glastechnieken |
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5-19 |
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A3 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:24910 |
Serial |
5825 |
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Author |
de Raedt, I.; Janssens, K.; Veeckman, J. |
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Title |
Echt of namaak? Venetiaans glas uit het oude Antwerpen |
Type |
A3 Journal article |
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Year |
1999 |
Publication |
De wetenschappelijke bibliotheek |
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67 |
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58-67 |
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A3 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:25300 |
Serial |
5579 |
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Author |
de Raedt, I.; Janssens, K.; Veeckman, J. |
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Title |
On the distinction between 16th and 17th century Venetian glass and façon-de-Venise glass |
Type |
H3 Book chapter |
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Year |
2002 |
Publication |
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Abbreviated Journal |
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Volume |
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95-121 |
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H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:40354 |
Serial |
5754 |
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Author |
de Paula Miranda, L. |
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Title |
Electronic transport in two dimensional systems with defects |
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Doctoral thesis |
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2022 |
Publication |
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Abbreviated Journal |
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Pages |
104 p. |
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Doctoral thesis; Condensed Matter Theory (CMT) |
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The pursuit for the next generation of nanodevices made scientists focus the attention to two dimensional materials. Experimental works of two dimensional materials are hardly free of structural defects, which, in turn, modify drastically the physical properties of its defect-free counterpart. In this work the presence of structural defects is study in two different materials. First, the dependence of the Hall, bend and longitudinal resistances to a perpendicular magnetic field and to vacancy defects in a four-terminal phosphorene single layer Hall bar is investigated. A tight-binding model in combination with the Landauer-Büttiker formalism is used to calculate the energy spectrum, the lead-to-lead transmissions, and the Hall and bend resistances of the system. It is shown that the terminals with zigzag edge orientation are responsible for the absence of quantized plateaus in the Hall resistance and peaks in the longitudinal resistance. A negative bend resistance in the ballistic regime is found due to the presence of high- and low- energy transport modes in the armchair and zigzag terminals, respectively. The system density of states, with single vacancy defects, shows that the presence of in-gap states is proportional to the number of vacancies. Quantized plateaus in the Hall resistance are only formed in a sufficiently clean system. The effects of different kinds of vacancies in the regime where the quantized plateaus are destroyed and a diffusive regime appears in the bend resistance are investigated. Next, we explore effects due to point defect clustering on the electronic and transport properties of bilayer graphene nanoribbons, for AA and AB stacking and zigzag and armchair boundaries, by means of the tight-binding approach and scattering matrix formalism. Evidence of vacancy concentration signatures exhibiting a maximum amplitude and an universality regardless of the system size, stacking and boundary types, in the density of states around the zero-energy level are observed. Our results are explained via the coalescence analysis of the strong sizeable vacancy clustering effect in the system and the breaking of inversion symmetry at high vacancy densities, demonstrating a similar density of states for two equivalent degrees of concentration disorder, below and above the maximum value. |
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Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:191340 |
Serial |
7151 |
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De Paepe, J.; Lindeboom, R.E.F.; Vanoppen, M.; De Paepe, K.; Demey, D.; Coessens, W.; Lamaze, B.; Verliefde, A.R.D.; Clauwaert, P.; Vlaeminck, S.E. |
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Title |
Refinery and concentration of nutrients from urine with electrodialysis enabled by upstream precipitation and nitrification |
Type |
A1 Journal article |
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Year |
2018 |
Publication |
Water research |
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Volume |
144 |
Issue |
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Pages |
76-86 |
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A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
Human urine is a valuable resource for nutrient recovery, given its high levels of nitrogen, phosphorus and potassium, but the compositional complexity of urine presents a challenge for an energy-efficient concentration and refinery of nutrients. In this study, a pilot installation combining precipitation, nitrification and electrodialysis (ED), designed for one person equivalent (1.2 L-urine d(-l)), was continuously operated for similar to 7 months. First, NaOH addition yielded calcium and magnesium precipitation, preventing scaling in ED. Second, a moving bed biofilm reactor oxidized organics, preventing downstream biofouling, and yielded complete nitrification on diluted urine (20-40%, i.e. dilution factors 5 and 2.5) at an average loading rate of 215 mg N L-1 d(-1). Batch tests demonstrated the halotolerance of the nitrifying community, with nitrification rates not affected up to an electrical conductivity of 40 mS cm(-1) and gradually decreasing, yet ongoing, activity up to 96 mS cm(-1) at 18% of the maximum rate. Next-generation 16S rRNA gene amplicon sequencing revealed that switching from a synthetic influent to real urine induced a profound shift in microbial community and that the AOB community was dominated by halophilic species closely related to Nitrosomonas aestuarii and Nitrosomonas marina. Third, nitrate, phosphate and potassium in the filtered (0.1 mu m) bioreactor effluent were concentrated by factors 43, 2.6 and 4.6, respectively, with ED. Doubling the urine concentration from 20% to 40% further increased the ED recovery efficiency by similar to 10%. Batch experiments at pH 6, 7 and 8 indicated a more efficient phosphate transport to the concentrate at pH 7. The newly proposed three-stage strategy opens up opportunities for energy- and chemical-efficient nutrient recovery from urine. Precipitation and nitrification enabled the long-term continuous operation of ED on fresh urine requiring minimal maintenance, which has, to the best of our knowledge, never been achieved before. (C) 2018 Elsevier Ltd. All rights reserved. |
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000447569300008 |
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2018-07-07 |
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0043-1354; 1879-2448 |
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Open Access |
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Approved |
no |
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Call Number |
UA @ admin @ c:irua:152907 |
Serial |
8468 |
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| Permanent link to this record |
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Author |
de Paepe, J.; Lindeboom, R.E.F.; Vanoppen, M.; Alonso Farinas, B.; Coessens, W.; Abbas, A.; Christiaens, M.; Dotremont, C.; Beckers, H.; Lamaze, B.; Demey, D.; Rabaey, K.; Clauwaert, P.; Verliefde, A.R.D.; Vlaeminck, S.E. |
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| |
Title |
Water treatment unit breadboard : ground test facility for the recycling of urine and shower water for one astronaut |
Type |
P3 Proceeding |
| |
Year |
2017 |
Publication |
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Abbreviated Journal |
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| |
Volume |
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Issue |
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Pages |
2 p.
T2 - 5th IWA Benelux Young Water Professional |
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Keywords |
P3 Proceeding; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Notes |
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Approved |
no |
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Call Number |
UA @ admin @ c:irua:151114 |
Serial |
8749 |
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| Permanent link to this record |
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Author |
de Nolf, W.; Vekemans, B.; Janssens, K.; van der Snickt, G.; Falkenberg, G. |
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| |
Title |
Pigment identification by scanning μ-XRF/μ-XRD |
Type |
H3 Book chapter |
| |
Year |
2007 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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UA library record |
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Impact Factor |
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Times cited |
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Open Access |
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| |
Notes |
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Approved |
Most recent IF: NA |
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| |
Call Number |
UA @ admin @ c:irua:64595 |
Serial |
5773 |
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| Permanent link to this record |
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| |
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Author |
de Nolf, W.; Vanmeert, F.; Janssens, K. |
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| |
Title |
XRDUA : crystalline phase distribution maps by two-dimensional scanning and tomographic (micro) X-ray powder diffraction |
Type |
A1 Journal article |
| |
Year |
2014 |
Publication |
Journal of applied crystallography |
Abbreviated Journal |
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| |
Volume |
47 |
Issue |
3 |
Pages |
1107-1117 |
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| |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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| |
Abstract |
Imaging of crystalline phase distributions in heterogeneous materials, either plane projected or in virtual cross sections of the object under investigation, can be achieved by scanning X-ray powder diffraction employing X-ray micro beams and X-ray-sensitive area detectors. Software exists to convert the two-dimensional powder diffraction patterns that are recorded by these detectors to one-dimensional diffractograms, which may be analysed by the broad variety of powder diffraction software developed by the crystallography community. However, employing these tools for the construction of crystalline phase distribution maps proves to be very difficult, especially when employing micro-focused X-ray beams, as most diffraction software tools have mainly been developed having structure solution in mind and are not suitable for phase imaging purposes. XRDUA has been developed to facilitate the execution of the complete sequence of data reduction and interpretation steps required to convert large sequences of powder diffraction patterns into a limited set of crystalline phase maps in an integrated fashion. |
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Wos |
000336738500031 |
Publication Date |
2014-05-28 |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0021-8898 |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
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Times cited |
62 |
Open Access |
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Notes |
; The authors would like to thank the synchrotron beamline staff at ID15 (ESRF, Grenoble, France), MicroXAS (SLS, Villigen, Switzerland) and PO6/BL-L (Petra III/Hasylab, Hamburg, Germany) for accommodating the experiments presented in this paper. Support from FWO 'Big Science' project G0C1213N as well as from the BELSPO project 'S2ART' (SD/RI/04A) is acknowledged. ; |
Approved |
Most recent IF: NA |
|
| |
Call Number |
UA @ admin @ c:irua:117758 |
Serial |
5920 |
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| Permanent link to this record |
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| |
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Author |
de Nolf, W.; Jaroszewicz, J.; van der Snickt, G.; Janssens, K.; Farnell, S.; Klaassen, L. |
|
| |
Title |
Combined micro-XRF/XRPD tomography on historical and modern paint multilayer samples at Beamline L |
Type |
H3 Book chapter |
| |
Year |
2008 |
Publication |
|
Abbreviated Journal |
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| |
Volume |
|
Issue |
|
Pages |
1633-1634 |
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Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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UA library record |
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Open Access |
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Notes |
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Approved |
Most recent IF: NA |
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| |
Call Number |
UA @ admin @ c:irua:74475 |
Serial |
5522 |
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| Permanent link to this record |
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| |
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Author |
de Nolf, W.; Jaroszewicz, J.; Janssens, K.; Falkenberg, G. |
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Title |
2θ-resolution obtainable during – XRPD experiments at Beamline L |
Type |
H3 Book chapter |
| |
Year |
2008 |
Publication |
|
Abbreviated Journal |
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Volume |
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Issue |
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Pages |
1655-1656 |
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Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Abstract |
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Additional Links |
UA library record |
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Open Access |
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Notes |
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Approved |
Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:74477 |
Serial |
5447 |
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| Permanent link to this record |
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| |
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Author |
de Nolf, W.; Janssens, K.; Rouchon, V.; Falkenberg, G. |
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Title |
Study of the degradation on historical documents induced by iron gall ink by means of scanning μ-XRF/μ-XRD |
Type |
H3 Book chapter |
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Year |
2007 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Additional Links |
UA library record |
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Impact Factor |
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Open Access |
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Notes |
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Approved |
Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:64597 |
Serial |
5850 |
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| Permanent link to this record |
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Author |
de Nolf, W.; Janssens, K.; Rickers, K. |
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Title |
Characterization of carcinogenic Ni-rich dust particles by scanning micro-XRF/XRD at BL L |
Type |
H3 Book chapter |
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Year |
2005 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Additional Links |
UA library record |
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Open Access |
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Notes |
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Approved |
Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:50853 |
Serial |
5503 |
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| Permanent link to this record |
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Author |
de Nolf, W. |
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Title |
Imaging of crystalline phase distributions by means of scanning and tomographic X-ray powder diffraction |
Type |
Doctoral thesis |
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Year |
2013 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
407 p. |
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Keywords |
Doctoral thesis; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Additional Links |
UA library record |
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Impact Factor |
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Notes |
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Approved |
no |
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Call Number |
UA @ admin @ c:irua:110910 |
Serial |
8057 |
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| Permanent link to this record |
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Author |
de Miranda, R.M.; de Fátima Andrade, M.; Worobiec, A.; Van Grieken, R. |
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Title |
Characterisation of aerosol particles in the São Paulo Metropolitan Area |
Type |
A1 Journal article |
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Year |
2002 |
Publication |
Atmospheric environment : an international journal |
Abbreviated Journal |
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Volume |
36 |
Issue |
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Pages |
345-352 |
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Keywords |
A1 Journal article; Laboratory Experimental Medicine and Pediatrics (LEMP); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Wos |
000173667400017 |
Publication Date |
2002-10-14 |
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Series Editor |
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Series Title |
|
Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
1352-2310 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
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Times cited |
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Open Access |
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Notes |
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Approved |
no |
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| |
Call Number |
UA @ admin @ c:irua:37781 |
Serial |
7591 |
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| Permanent link to this record |
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Author |
De Micco, V.; Amitrano, C.; Mastroleo, F.; Aronne, G.; Battistelli, A.; Carnero-Diaz, E.; De Pascale, S.; Detrell, G.; Dussap, C.-G.; Ganigué, R.; Jakobsen, Ø.M.; Poulet, L.; Van Houdt, R.; Verseux, C.; Vlaeminck, S.E.; Willaert, R.; Leys, N. |
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Title |
Plant and microbial science and technology as cornerstones to Bioregenerative Life Support Systems in space |
Type |
A1 Journal article |
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Year |
2023 |
Publication |
NPJ microgravity |
Abbreviated Journal |
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Volume |
9 |
Issue |
1 |
Pages |
69-12 |
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Keywords |
A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
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Abstract |
Long-term human space exploration missions require environmental control and closed Life Support Systems (LSS) capable of producing and recycling resources, thus fulfilling all the essential metabolic needs for human survival in harsh space environments, both during travel and on orbital/planetary stations. This will become increasingly necessary as missions reach farther away from Earth, thereby limiting the technical and economic feasibility of resupplying resources from Earth. Further incorporation of biological elements into state-of-the-art (mostly abiotic) LSS, leading to bioregenerative LSS (BLSS), is needed for additional resource recovery, food production, and waste treatment solutions, and to enable more self-sustainable missions to the Moon and Mars. There is a whole suite of functions crucial to sustain human presence in Low Earth Orbit (LEO) and successful settlement on Moon or Mars such as environmental control, air regeneration, waste management, water supply, food production, cabin/habitat pressurization, radiation protection, energy supply, and means for transportation, communication, and recreation. In this paper, we focus on air, water and food production, and waste management, and address some aspects of radiation protection and recreation. We briefly discuss existing knowledge, highlight open gaps, and propose possible future experiments in the short-, medium-, and long-term to achieve the targets of crewed space exploration also leading to possible benefits on Earth. |
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Wos |
001093834300001 |
Publication Date |
2023-08-24 |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
2373-8065 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
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Impact Factor |
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Times cited |
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Open Access |
OpenAccess |
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Notes |
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Approved |
Most recent IF: NA |
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| |
Call Number |
UA @ admin @ c:irua:199050 |
Serial |
8916 |
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| Permanent link to this record |
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| |
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Author |
De Meyer, S.; Vanmeert, F.; Vertongen, R.; van Loon, A.; Gonzalez, V.; van der Snickt, G.; Vandivere, A.; Janssens, K. |
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Title |
Imaging secondary reaction products at the surface of Vermeer's Girl with the Pearl Earring by means of macroscopic X-ray powder diffraction scanning |
Type |
A1 Journal article |
| |
Year |
2019 |
Publication |
Heritage science |
Abbreviated Journal |
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| |
Volume |
7 |
Issue |
1 |
Pages |
67 |
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| |
Keywords |
A1 Journal article; Art; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Antwerp Cultural Heritage Sciences (ARCHES) |
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| |
Abstract |
The use of non-invasive macroscopic imaging techniques is becoming more prevalent in the field of cultural heritage, especially to avoid invasive procedures that damage valuable artworks. For this purpose, an X-ray powder diffraction scanner (MA-XRPD) capable of visualising crystalline compounds in a highly specific manner was recently developed. Many inorganic pigments present in paintings fall into this category of materials. In this study, the 17th century oil painting Girl with a Pearl Earring (c. 1665) by Johannes Vermeer was analysed with a combination of transmission and reflection mode MA-XRPD. By employing this scanner in reflection mode, the relative sensitivity for compounds that are present at the paint surface could be increased, establishing it as a highly relevant technique for investigating the degradation processes that are ongoing at paint surfaces. Many of the original pigments employed by Vermeer could be identified, along with four secondary alteration products: gypsum (CaSO4 center dot 2H(2)O), anglesite (PbSO4), palmierite (K2Pb(SO4)(2)) and weddellite (CaC2O4 center dot 2H(2)O). The formation of gypsum was linked to the presence of chalk in the upper glaze layer while the formation of palmierite and weddellite is driven by the presence of lake pigments (and their substrates). In this manner, MA-XRPD can also be used to pinpoint locations relevant for sampling and synchrotron mu-XRPD analysis, which provides information on the microscopic make-up of the paint. A paint cross-section taken from an area rich in palmierite was analysed with synchrotron mu-XRPD, which confirmed the presence of this secondary compound at the interface of the upper paint layer with the ground layer as well as the presence of anglesite in the ground layer. The capacity of MA-XRPD to identify and chart secondary alteration products in a non-invasive manner has only very recently been demonstrated and makes it a highly relevant technique for the assessment of the chemical condition of works of art. |
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Address |
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Corporate Author |
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Thesis |
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Place of Publication |
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Editor |
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Language |
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Wos |
000484938100001 |
Publication Date |
2019-09-08 |
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| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
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| |
Series Volume |
|
Series Issue |
|
Edition |
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| |
ISSN |
2050-7445 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
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| |
Impact Factor |
|
Times cited |
5 |
Open Access |
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| |
Notes |
; The authors would like to thank Interreg Vlaanderen-Nederland for funding to help develop the MA-rXRPD scanner. This project was made possible with support from the Johan Maurits Compagnie Foundation. This study was supported by Interreg and CALIPSOplus (Grant 730872). ; |
Approved |
Most recent IF: NA |
|
| |
Call Number |
UA @ admin @ c:irua:162801 |
Serial |
5653 |
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| Permanent link to this record |
| |
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| |
|
Author |
De Meyer, S.; Vanmeert, F.; Vertongen, R.; Van Loon, A.; Gonzalez, V.; Delaney, J.; Dooley, K.; Dik, J.; van der Snickt, G.; Vandivere, A.; Janssens, K. |
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| |
Title |
Macroscopic x-ray powder diffraction imaging reveals Vermeer's discriminating use of lead white pigments in Girl with a Pearl Earring |
Type |
A1 Journal article |
| |
Year |
2019 |
Publication |
Science Advances |
Abbreviated Journal |
|
|
| |
Volume |
5 |
Issue |
8 |
Pages |
eaax1975 |
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| |
Keywords |
A1 Journal article; Engineering sciences. Technology; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Antwerp Cultural Heritage Sciences (ARCHES) |
|
| |
Abstract |
Until the 19th century, lead white was the most important white pigment used in oil paintings. Lead white is typically composed of two crystalline lead carbonates: hydrocerussite [2PbCO(3)center dot Pb(OH)(2)] and cerussite (PbCO3). Depending on the ratio between hydrocerussite and cerussite, lead white can be classified into different subtypes, each with different optical properties. Current methods to investigate and differentiate between lead white subtypes involve invasive sampling on a microscopic scale, introducing problems of paint damage and representativeness. In this study, a 17th century painting Girl with a Pearl Earring (by Johannes Vermeer, c. 1665, collection of the Mauritshuis, NL) was analyzed with a recently developed mobile and noninvasive macroscopic x-ray powder diffraction (MA-XRPD) scanner within the project Girl in the Spotlight. Four different subtypes of lead white were identified using XRPD imaging at the macroscopic and microscopic scale, implying that Vermeer was highly discriminatory in his use of lead white. |
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Address |
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Corporate Author |
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Thesis |
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Publisher |
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Place of Publication |
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Editor |
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| |
Language |
|
Wos |
000491121200021 |
Publication Date |
2019-08-30 |
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| |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
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| |
Series Volume |
|
Series Issue |
|
Edition |
|
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| |
ISSN |
2375-2548 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
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| |
Impact Factor |
|
Times cited |
3 |
Open Access |
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| |
Notes |
; K.J. wishes to thank the Research Council of the University of Antwerp for financial support through GOA project SolarPaint. Also, FWO, Brussels is acknowledged for financial support through grants G056619N and G054719N. The support of InterReg programme Smart*Light is appreciated. ; |
Approved |
Most recent IF: NA |
|
| |
Call Number |
UA @ admin @ c:irua:163815 |
Serial |
5700 |
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| Permanent link to this record |
| |
|
| |
|
Author |
De Meyer, S.; Vanmeert, F.; Janssens, K.; Storme, P. |
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| |
Title |
A mobile scanner for xrpd-imaging of paintings in transmission and reflection geometry |
Type |
P1 Proceeding |
| |
Year |
2017 |
Publication |
ACTA ARTIS ACADEMICA 2017: PAINTING AS A STORY
T2 – 6th Interdisciplinary ALMA Conference, JUN 01-03, 2017, Brno, CZECH REPUBLIC |
Abbreviated Journal |
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| |
Volume |
|
Issue |
|
Pages |
29-38 |
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Keywords |
P1 Proceeding; Art; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Antwerp Cultural Heritage Sciences (ARCHES) |
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Abstract |
In this paper the possibilities and limitations of a non-invasive prototype of macroscopic X-ray powder diffraction scanning device employed in transmission and reflection mode are demonstrated. Contrarily to e.g. macroscopic X-ray fluorescence scanners, which gather information on the elemental level, the prototype instrument allows to obtain information on the crystallographic structure of the components. When applied to cultural heritage artefacts, it becomes possible to identify and localize crystalline pigments. Furthermore, it became clear that different information can be available depending on the geometry of the scanner components. In transmission mode information over the entire stratigraphy of the painting is gathered, which is useful to e.g. identify background substrates and major pigments. On the other hand, reflection-XRPD is a surface-sensitive technique and allows the identification of pigments and degradation products located on the surface. The data acquired during both experiments can be presented as two-dimensional distribution maps which show the spatial distribution of every identified pigment. The complementary nature of transmission and reflectionmode makes it possible to gain more insight into the stratigraphy of the painting which is valuable information for conservation and restoration scientists. |
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000430517600002 |
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ISSN |
978-80-87108-75-8 |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Times cited |
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no |
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Call Number |
UA @ admin @ c:irua:189869 |
Serial |
7392 |
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Author |
De Meyer, S. |
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Title |
Macroscopic X-ray powder diffraction in reflection mode : a new technique for chemical imaging of artworks |
Type |
Doctoral thesis |
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Year |
2023 |
Publication |
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Abbreviated Journal |
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Pages |
285 p. |
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Keywords |
Doctoral thesis; Engineering sciences. Technology; Art; Antwerp X-ray Imaging and Spectroscopy (AXIS) |
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Abstract |
Scientific research into cultural heritage has significantly grown in importance over the past decades. The growing popularity of macroscopic imaging techniques such as X-ray fluorescence or Fourier transform infrared now means that conservators and restorers have access to highly objective information on the chemical composition of a painting without the necessity for destructive sampling. As many works of art are heterogeneous on the macroscopic scale, it is clear that solely relying on microscopic samples does not provide sufficiently representative information on the condition of a painting and that macroscopic imaging techniques should be considered a crucial part of the analytical toolkit for conservation science. The goal of this research has been to investigate the added value of reflection-mode macroscopic X-ray powder diffraction (MA-XRPD) for scientific and art historical investigations of cultural heritage artefacts. A prototype scanner was developed after careful consideration of the individual components. This mobile instrument allows for the analysis of flat objects such as oil paintings with reflection MA-XRPD. In this manner images can be obtained that show the distribution of crystalline components present at the surface of the stratigraphy. These crystalline materials can originate from different sources and include original pigments and non-original pigments. MA-XRPD offers novel insights into original pigments such as ultramarine, copper sulfates and lead white. In Girl with a Pearl Earring by Vermeer the MA-XRPD instrument was used to prove that Vermeer used multiple subtypes of lead white to achieve subtle optical effects while in the painting The Night Watch by Rembrandt the lead white composition was studied in detail; multiple rare lead-based compounds were identified that could be linked to the usage of specific driers in the oil paint. By investigating the presence of degradation products, MA-XRPD can be used to assess the conservation state of an artwork. Secondary alteration products were identified in paintings by Nellius and Mignon, explaining why the paintings had visually deteriorated over time. MA-XRPD registered the presence of lead arsenates which were formed from the original yellow arsenic-based orpiment. By combining microscopic and macroscopic analysis, a chemical degradation pathway for the conversion of the unstable orpiment pigment was proposed. In this manner, MA-XRPD can also be used to provide highly valuable information for conservators and restorers by pinpointing areas that have undergone degradation and to guide sampling campaigns. |
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Additional Links |
UA library record |
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Most recent IF: NA |
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Call Number |
UA @ admin @ c:irua:198766 |
Serial |
8896 |
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Author |
De Meulenaere, P.; Van Tendeloo, G.; van Landuyt, J.; Mommaert, C.; Severne, G. |
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Title |
Radiation defects and ordered radiation patterns in Ni and Ni4Mo: a study by electron microscopy |
Type |
A1 Journal article |
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Year |
1993 |
Publication |
Philosophical magazine: A: physics of condensed matter: defects and mechanical properties |
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Volume |
67 |
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3 |
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745-756 |
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Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
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Place of Publication |
London |
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Wos |
A1993 |
Publication Date |
2007-07-08 |
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Series Issue |
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Edition |
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ISSN |
0141-8610;1460-6992; |
ISBN |
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Additional Links |
UA library record; https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:A1993; WoS full record; WoS citing articles |
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Impact Factor |
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Times cited |
1 |
Open Access |
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Call Number |
UA @ lucian @ c:irua:6783 |
Serial |
2808 |
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Author |
De Meulenaere, P.; Van Tendeloo, G.; van Landuyt, J. |
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Title |
Direct observation of clusters in some FCC alloys by HREM |
Type |
A1 Journal article |
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Year |
1994 |
Publication |
Icem |
Abbreviated Journal |
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13 |
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447-448 |
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Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
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A1994BE09X00207 |
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0000-00-00 |
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Additional Links |
UA library record; WoS full record; |
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no |
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Call Number |
UA @ lucian @ c:irua:10052 |
Serial |
716 |
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Author |
De Meulenaere, P.; Van Tendeloo, G.; van Landuyt, J. |
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Title |
How to interpret short-range order HREM images |
Type |
P3 Proceeding |
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Year |
1996 |
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Keywords |
P3 Proceeding; Engineering sciences. Technology; Electron microscopy for materials research (EMAT) |
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Place of Publication |
Dublin |
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Wos |
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Publication Date |
0000-00-00 |
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Additional Links |
UA library record |
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no |
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Call Number |
UA @ lucian @ c:irua:110168 |
Serial |
1493 |
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