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Author Albrechts, M.; Tsonev, I.; Bogaerts, A.
  Title Investigation of O atom kinetics in O2plasma and its afterglow Type A1 Journal Article
  Year 2024 Publication Plasma Sources Science and Technology Abbreviated Journal Plasma Sources Sci. Technol.
  Volume 33 Issue 4 Pages 045017
  Keywords A1 Journal Article; oxygen plasma, pseudo-1D plug-flow kinetic model, O atoms, low-pressure validation, atmospheric pressure microwave torch; Plasma, laser ablation and surface modeling Antwerp (PLASMANT) ;
  Abstract We have developed a comprehensive kinetic model to study the O atom kinetics in an O<sub>2</sub>plasma and its afterglow. By adopting a pseudo-1D plug-flow formalism within the kinetic model, our aim is to assess how far the O atoms travel in the plasma afterglow, evaluating its potential as a source of O atoms for post-plasma gas conversion applications. Since we could not find experimental data for pure O<sub>2</sub>plasma at atmospheric pressure, we first validated our model at low pressure (1–10 Torr) where very good experimental data are available. Good agreement between our model and experiments was achieved for the reduced electric field, gas temperature and the densities of the dominant neutral species, i.e. O<sub>2</sub>(a), O<sub>2</sub>(b) and O. Subsequently, we confirmed that the chemistry set is consistent with thermodynamic equilibrium calculations at atmospheric pressure. Finally, we investigated the O atom densities in the O<sub>2</sub>plasma and its afterglow, for which we considered a microwave O<sub>2</sub>plasma torch, operating at a pressure between 0.1 and 1 atm, for a flow rate of 20 slm and an specific energy input of 1656 kJ mol<sup>−1</sup>. Our results show that for both pressure conditions, a high dissociation degree of ca. 92% is reached within the discharge. However, the O atoms travel much further in the plasma afterglow for<italic>p</italic>= 0.1 atm (9.7 cm) than for<italic>p</italic>= 1 atm (1.4 cm), attributed to the longer lifetime (3.8 ms at 0.1 atm vs 1.8 ms at 1 atm) resulting from slower three-body recombination kinetics, as well as a higher volumetric flow rate.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) 001209453500001 Publication Date 2024-04-01
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0963-0252 ISBN Additional Links UA library record; WoS full record
  Impact Factor 3.8 Times cited Open Access
  Notes This research was supported by the Horizon Europe Framework Program ‘Research and Innovation Actions’ (RIA), Project CANMILK (Grant No. 101069491). Approved Most recent IF: 3.8; 2024 IF: 3.302
  Call Number PLASMANT @ plasmant @c:irua:205920 Serial 9125
Permanent link to this record
 

 
Author Hassani, N.; Movafegh-Ghadirli, A.; Mahdavifar, Z.; Peeters, F.M.; Neek-Amal, M.
  Title Two new members of the covalent organic frameworks family : crystalline 2D-oxocarbon and 3D-borocarbon structures Type A1 Journal article
  Year 2024 Publication Computational materials science Abbreviated Journal
  Volume 241 Issue Pages 1-9
  Keywords A1 Journal article; Condensed Matter Theory (CMT)
  Abstract Oxocarbons, known for over two centuries, have recently revealed a long-awaited facet: two-dimensional crystalline structures. Employing an intelligent global optimization algorithm (IGOA) alongside densityfunctional calculations, we unearthed a quasi -flat oxocarbon (C 6 0 6 ), featuring an oxygen -decorated hole, and a novel 3D-borocarbon. Comparative analyses with recently synthesized isostructures, such as 2D -porous carbon nitride (C 6 N 6 ) and 2D -porous boroxine (B 6 0 6 ), highlight the unique attributes of these compounds. All structures share a common stoichiometry of X 6 Y 6 (which we call COF-66), where X = B, C, and Y = B, N, O (with X not equal Y), exhibiting a 2D -crystalline structure, except for borocarbon C 6 B 6 , which forms a 3D crystal. In our comprehensive study, we conducted a detailed exploration of the electronic structure of X 6 Y 6 compounds, scrutinizing their thermodynamic properties and systematically evaluating phonon stability criteria. With expansive surface areas, diverse pore sizes, biocompatibility, pi-conjugation, and distinctive photoelectric properties, these structures, belonging to the covalent organic framework (COF) family, present enticing prospects for fundamental research and hold potential for biosensing applications.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) 001215960700001 Publication Date 2024-04-23
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0927-0256 ISBN Additional Links UA library record; WoS full record
  Impact Factor 3.3 Times cited Open Access
  Notes Approved Most recent IF: 3.3; 2024 IF: 2.292
  Call Number UA @ admin @ c:irua:206005 Serial 9179
Permanent link to this record
 

 
Author Osorio-Tejada, J.; Escriba-Gelonch, M.; Vertongen, R.; Bogaerts, A.; Hessel, V.
  Title CO₂ conversion to CO via plasma and electrolysis : a techno-economic and energy cost analysis Type A1 Journal article
  Year 2024 Publication Energy & environmental science Abbreviated Journal
  Volume Issue Pages
  Keywords A1 Journal article; Engineering sciences. Technology; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT)
  Abstract Electrification and carbon capture technologies are essential for achieving net-zero emissions in the chemical sector. A crucial strategy involves converting captured CO2 into CO, a valuable chemical feedstock. This study evaluates the feasibility of two innovative methods: plasma activation and electrolysis, using clean electricity and captured CO2. Specifically, it compares a gliding arc plasma reactor with an embedded novel carbon bed system to a modern zero-gap type low-temperature electrolyser. The plasma method stood out with an energy cost of 19.5 GJ per tonne CO, marking a 43% reduction compared to electrolysis and conventional methods. CO production costs for plasma- and electrolysis-based plants were $671 and $962 per tonne, respectively. However, due to high uncertainty regarding electrolyser costs, the CO production costs in electrolysis-based plants may actually range from $570 to $1392 per tonne. The carbon bed system in the plasma method was a key factor in facilitating additional CO generation from O-2 and enhancing CO2 conversion, contributing to its cost-effectiveness. Challenges for electrolysis included high costs of equipment and low current densities. Addressing these limitations could significantly decrease production costs, but challenges arise from the mutual relationship between intrinsic parameters, such as CO2 conversion, CO2 input flow, or energy cost. In a future scenario with affordable feedstocks and equipment, costs could drop below $500 per tonne for both methods. While this may be more challenging for electrolysis due to complexity and expensive catalysts, plasma-based CO production appears more viable and competitive.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) 001218045900001 Publication Date 2024-05-06
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 1754-5692; 1754-5706 ISBN Additional Links UA library record; WoS full record
  Impact Factor 32.5 Times cited Open Access
  Notes Approved Most recent IF: 32.5; 2024 IF: 29.518
  Call Number UA @ admin @ c:irua:205986 Serial 9138
Permanent link to this record
 

 
Author Nelson, J.W.; Williams, I.; Johansson, T.B.; Van Grieken, R.E.
  Title Elemental analysis of aerosols using proton-scattering Type A1 Journal article
  Year 1974 Publication IEEE transactions on nuclear science Abbreviated Journal
  Volume Ns21 Issue 1 Pages 618-621
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract Elemental analysis for all of the light elements up through chlorine by elastic scattering of 16 MeV protons has been shown to be feasible. Basic problems associated with such measurements are discussed including kinematics, angular distribution, and sample backings. Spectra are presented for air particulate matter for both a total filter (Nuclepore) and a size fractionated air impactor (polystyrene backed) sample. The method is absolute, non destructive and can be used in conjunction with proton induced x-ray fluorescence to quantitatively analyze all elements in the same sample in minutes of time.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1974S533700086 Publication Date 2008-07-22
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0018-9499 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:113642 Serial 7881
Permanent link to this record
 

 
Author Robberecht, H.; vanden Berghe, D.; Deelstra, H.; Van Grieken, R.
  Title Selenium in the Belgian soils and its uptake by rye-grass Type A1 Journal article
  Year 1982 Publication The science of the total environment Abbreviated Journal
  Volume 25 Issue 1 Pages 61-69
  Keywords A1 Journal article; Pharmacology. Therapy; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract Data obtained by atomic absorption spectroscopy showed a selenium concentration of only 0.11 ppm as an average value for the most representative agricultural soils in Belgium. The selenium content in rye-grass grown on different soil types was between 0.05 and 0.11 ppm, and positively correlated with the soil selenium level. Addition of selenium in the form of selenite to the different soil types resulted in an increased selenium uptake by the plant. The ultimate concentration in the plant depended on the structural and chemical composition of the soil. Twelve other elements were determined in the soils by energy-dispersive X-ray fluorescence; none showed a strong correlation with the soil selenium content or with the selenium uptake by ryegrass.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1982PJ93000006 Publication Date 2003-09-12
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0048-9697; 1879-1026 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116646 Serial 8510
Permanent link to this record
 

 
Author Robberecht, H.; Van Grieken, R.; van Sprundel, M.; vanden Berghe, D.; Deelstra, H.
  Title Selenium in environmental and drinking waters of Belgium Type A1 Journal article
  Year 1983 Publication The science of the total environment Abbreviated Journal
  Volume 26 Issue 2 Pages 163-172
  Keywords A1 Journal article; Pharmacology. Therapy; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract The tetravalent and hexavalent selenium content of water samples can be determined by conventional energy-dispersive X-ray fluorescence after different preconcentration steps. Selenium values of nearly three-hundred different environmental and drinking water samples in Belgium are reported. The results are quite low, ranging from the detection limits up to 1 μg l−1. The concentration levels are compared to literature data and the speciation is discussed. The contribution of drinking water to the daily intake of selenium in Belgium ranges from less than 0.2 to 5%.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1983QD20900006 Publication Date 2003-09-12
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0048-9697; 1879-1026 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116647 Serial 8508
Permanent link to this record
 

 
Author Robberecht, H.; Deelstra, H.; vanden Berghe, D.; Van Grieken, R.
  Title Metal pollution and selenium distributions in soils and grass near a non-ferrous plant Type A1 Journal article
  Year 1983 Publication The science of the total environment Abbreviated Journal
  Volume 29 Issue 3 Pages 229-241
  Keywords A1 Journal article; Pharmacology. Therapy; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract Multi-element analysis results of direct energy-dispersive X-ray fluorescence of soil samples taken in the vicinity of a non-ferrous plant in Antwerp are reported. High concentrations of Pb, Cu, Zn, As and Se are found in nearby residential areas, especially in top-soil layers. Selenium pollution appears not to be leached significantly to lower soil horizons, but it is available for uptake by rye-grass, in which toxic levels are found. Results are compared to literature data. Hydride generation atomic absorption spectrometry proved to be unsuitable for direct analysis of the heavily contaminated soils.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1983RE16300003 Publication Date 2003-09-12
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0048-9697; 1879-1026 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116648 Serial 8218
Permanent link to this record
 

 
Author Subramanian, V.; Van 't dack, L.; Van Grieken, R.
  Title Preliminary studies on the geochemistry of the Cauvery river basin Type A1 Journal article
  Year 1985 Publication Proceedings of the Indian Academy of Sciences: earth and planetary sciences Abbreviated Journal
  Volume 94 Issue 2 Pages 99-110
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract Samples of water and sediments were collected over a three year period from the entire region of Cauvery river basin excluding the estuary. On the basis of our observations, we have calculated the average composition of the Cauvery river at several locations from the catchment to the river mouth, the downstream profile of sediment load, annual erosion rates, solute and sediment fluxes and have predicted on long term changes. The sediment chemistry was determined by x-ray fluorescence (xrf) technique, and calculated mean compositions of the Cauvery and its tributary bed and the suspended sediment were compared to those of world average river sediments. Downstream profiles of some of the elements appear to be controlled by size and mineralogical characteristics besides local factors specific to the location of the samples. Interelemental relationships indicated good correlation among the transition elements indicating their co-genetic behaviour within the drainage basin.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1985ARL3300004 Publication Date 2010-08-25
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0253-4126 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:111503 Serial 8410
Permanent link to this record
 

 
Author Bernard, P.C.; Van Grieken, R.E.; Eisma, D.
  Title Classification of estuarine particles using automated electron-microprobe analysis and multivariate techniques Type A1 Journal article
  Year 1986 Publication Environmental science and technology Abbreviated Journal
  Volume 20 Issue 5 Pages 467-473
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1986C117800013 Publication Date 2005-03-17
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0013-936x; 1520-5851 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:113614 Serial 7668
Permanent link to this record
 

 
Author Andreae, M.O.; Charlson, R.J.; Bruynseels, F.; Storms, H.; Van Grieken, R.; Maenhaut, W.
  Title Internal mixture of sea salt, silicates, and excess sulfate in marine aerosols Type A1 Journal article
  Year 1986 Publication Science Abbreviated Journal
  Volume 232 Issue 4758 Pages 1620-1623
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract Individual aerosol particles from the remote marine atmosphere were investigated by scanning electron microscopy and electron microprobe analysis. A large fraction of the silicate mineral component of the aerosol was found to be internally mixed with sea-salt aerosol particles. This observation explains the unexpected similarity in the size distributions of silicates and sea salt that has been observed in remote marine aerosols. Reentrainment of dust particles previously deposited onto the sea surface and collision between aerosol particles can be excluded as possible source mechanisms for these internally mixed aerosols. The internal mixing could be produced by processes within clouds, including droplet coalescence. Cloud processes may also be responsible for the observed enrichment of excess (nonsea-salt) sulfate on sea-salt particles.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1986C826900027 Publication Date 2006-10-05
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0036-8075; 1095-9203 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:113613 Serial 8116
Permanent link to this record
 

 
Author Rojas, C.M.; Goossens, D.; Van Grieken, R.
  Title Penetration of atmospheric aerosols during collection in cellulose filters, studied by secondary ion mass spectrometry Type A1 Journal article
  Year 1989 Publication Journal of aerosol science Abbreviated Journal
  Volume 20 Issue 5 Pages 569-574
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract The penetration of aerosol particles in a Whatman-41 cellulose filter has been studied via the depth profiles of different elements present in the aerosol. Depth profiles were obtained by analyzing both fine and coarse fractions from a dichotomous sampler by secondary ion mass spectrometry. The fine particles had an aerodynamic diameter dae of less than 2.5 μm, whereas the coarse fraction had 2.5 ≤ dae ≤ 15 μm. Elements such as Al, Si, Ca, Ti and Fe were associated with coarse airborne particles, while S, Cl, Zn, and Br were more abundant in the fine fraction. Results showed that particle size plays an important role in the distribution of particulate matter throughout the filter. SiTi-containing particles were mostly deposited near the surface of the filter, and their profiles can be estimated using a polynomial function, whereas the profile of AlCaFe-containing particles can be approached by an exponential decay function. Elements associated with fine fraction aerosols mainly originating from combustion processes, can penetrate up to about 25% of the total filter thickness, and their profiles are better represented by a diffusion function.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1989AN60500007 Publication Date 2003-08-06
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0021-8502; 1879-1964 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116822 Serial 8368
Permanent link to this record
 

 
Author Rojas, C.M.; Otten, P.M.; Van Grieken, R.E.
  Title Characterization of airborne particulate matter collected over the North Sea Type A1 Journal article
  Year 1989 Publication Journal of aerosol science Abbreviated Journal
  Volume 20 Issue 8 Pages 1257-1260
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1989CN23100101 Publication Date 2003-08-06
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0021-8502; 1879-1964 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116819 Serial 7616
Permanent link to this record
 

 
Author Xhoffer, C.; Jacob, W.; Van Grieken, R.
  Title Application of electron energy loss spectroscopy to aerosols Type A1 Journal article
  Year 1989 Publication Journal of aerosol science Abbreviated Journal
  Volume 20 Issue 8 Pages 1617-1619
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1989CN23100191 Publication Date 2003-08-06
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0021-8502; 1879-1964 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116820 Serial 7472
Permanent link to this record
 

 
Author Leysen, L.; Roekens, E.; Van Grieken, R.
  Title Air-pollution-induced chemical decay of a sandy-limestone cathedral in Belgium Type A1 Journal article
  Year 1989 Publication The science of the total environment Abbreviated Journal
  Volume 78 Issue Pages 263-277
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract Different trace- and microanalytical techniques were used in an extensive study to elucidate the chemical deterioration process of the sandy-limestone St Rombouts Cathedral in Mechelen, Belgium. Samples of stones, mortar joints, slates, atmospheric aerosols and gases, total and wet deposition, and water that had run down the cathedral walls, were all thoroughly characterized. At the east side, usually not exposed to precipitation, a 3001000-μm thick outer crust of microcrystalline gypsum was observed, while at the west side, this surface layer was mostly eroded away due to precipitation. At the north and south sides, the crust contains varying amounts of gypsum and calcite. The gypsum is mostly present in a bar-shaped morphology and carbonaceous fly-ash particles were rarely found in the weathering crust. Local stone characteristics seem to be extremely important in relation to the gypsum content of the crust; black samples always have a much higher sulphate content than the corresponding white samples, irrespective of the predominant direction of orientation. The relative contribution of nitrogen- and chlorine-containing pollutants to the total decay process is much smaller than that of sulphur-containing pollutants. Deposition samples collected at the site of the cathedral mostly had a pH of > 5.6, due to the neutralization of the rainwater by alkaline atmospheric constituents. Runoff water and washdown water were enriched in all ions, especially Ca2+ and SO42−, indicating that, indeed, gypsum is the most important weathering product. The suspension in deposition samples and black-well leaching water was highly enriched in silicon-containing particles, while runoff water and white-wall leaching water contained a predominant calcium-rich suspension.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1989R806400021 Publication Date 2003-09-12
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0048-9697; 1879-1026 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116649 Serial 7431
Permanent link to this record
 

 
Author Kolaitis, L.N.; Bruynseels, F.J.; Van Grieken, R.E.; Andreae, M.O.
  Title Determination of methanesulfonic acid and non-sea-salt sulfate in single marine aerosol particles Type A1 Journal article
  Year 1989 Publication Environmental science and technology Abbreviated Journal
  Volume 23 Issue 2 Pages 236-240
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1989T024900023 Publication Date 2005-03-17
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0013-936x; 1520-5851 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116813 Serial 7783
Permanent link to this record
 

 
Author Van Borman, W.; Wouters, L.; Van Grieken, R.; Adams, F.
  Title Lead particles in an urban atmosphere : an individual particle approach Type A1 Journal article
  Year 1990 Publication The science of the total environment Abbreviated Journal
  Volume 90 Issue Pages 55-66
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract In air particulate matter, sampled at a suburban site near the city of Antwerp, Belgium, more than 1500 individual Pb-containing aerosol particles with projected diameters between 0.2 and 15 μm were analyzed by automated electron probe X-ray micro analysis (EPXMA) for 26 elements and morphological features. Laser microprobe mass analysis (LAMMA) was used to detect elements with Z < 11, particularly ammonium compounds. The Pb-containing particles were classified into five main classes: Pb-sulfates, Pb-halides, soil related Pb, Pb associated with medium atomic number elements and Pb associated with high atomic number elements. Each class was divided into several distinct particle types, of which the abundance (in number and mass %), the mean projected particle diameter, and the chemical composition were determined. Auto exhaust products are responsible for Pb-sulfates and Pb-halides, making up respectively 66.7 and 27.8% by mass of the Pb-containing particles. Ammonium sulfate coatings were found to be present on nearly all Pb particles. The observations were correlated with daily concentrations of Pb and Br, obtained by particle induced X-ray emission analysis (PIXE).
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1990CJ43500005 Publication Date 2003-09-12
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0048-9697; 1879-1026 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116651 Serial 8169
Permanent link to this record
 

 
Author Leysen, L.A.; Roekens, E.J.; Van Grieken, R.E.; De Geyter, G.
  Title Characterization of the weathering crust of various historical buildings in Belgium Type A1 Journal article
  Year 1990 Publication The science of the total environment Abbreviated Journal
  Volume 90 Issue Pages 117-147
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract A variety of samples, collected from different historical buildings and monuments throughout Belgium, were thoroughly studied, using several trace- and micro-analysis techniques. Thin sections of stones and mortar joints were characterized by means of electron probe X-ray microanalysis (EPXMA). The morphological appearance of the surface weathering crust and the possible presence of non-innate particles in the crust were elucidated using petrographical and electron microscopy. Quantitative characterization of the total chemical composition of the crust surface layer and underlying layer was performed by energy-dispersive X-ray fluorescence, and by ion chromatography and atomic absorption spectrometry for the leachable components. Special attention was also paid to the chemical composition of rain and air at the particular sampling sites. The element distribution in the transition zone between the weathering crust and the original stone material was found to vary greatly amongst the different samples analyzed. Detailed EPXMA measurements on pieces of the weathering crust showed remarkable differences in morphology and composition between the surface and the underlying layer, and provided information about the presence of fly-ash and soil dust particles in the crust. Except for crusts from the city of Brussels, which were all very high in sulphate, the samples appeared to contain very variable sulphate contents; very local micro-climate and environmental conditions at a particular site are more important in determining the weathering condition of the building stones than the local air pollution situation. Bulk analytical characterization further showed, in all the crust samples studied, a very small contribution of nitrogen- and chlorine-containing weathering products, in contrast to sulphur-containing weathering salts.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1990CJ43500010 Publication Date 2003-09-12
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0048-9697; 1879-1026 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116650 Serial 7636
Permanent link to this record
 

 
Author Rojas, C.M.; Figueroa, L.; Janssens, K.H.; Van Espen, P.E.; Adams, F.C.; Van Grieken, R.E.
  Title The elemental composition of airborne particulate matter in the Atacama desert, Chile Type A1 Journal article
  Year 1990 Publication The science of the total environment Abbreviated Journal
  Volume 91 Issue Pages 251-267
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract Air particulate samples were collected at Chapiquiña near Arica (Chile) with a six-stage cascade impactor for about 17-day periods during a 31 month interval. Sixteen elements were determined by energy dispersive X-ray fluorescence analysis, and the elemental concentrations were subjected to principal factor analysis. The variability with time of the coarse particles was described by two factors both related to soil dispersion, whereas the fine particle variations could be explained by a third factor related to marine influence. Enrichment factors were compared with those obtained in other remote continental areas, in particular those of air particulate matter sampled at Chacaltaya, Bolivia. Results point to a negligible anthropogenic influence.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1990CM36100019 Publication Date 2003-09-12
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0048-9697 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116652 Serial 5602
Permanent link to this record
 

 
Author Saiz-Jimenez, C.; Garcia-Rowe, J.; Garcia Del Cura, M.A.; Ortega-Camvo, J.J.; Roekens, E.; Van Grieken, R.
  Title Endolithic cyanobacteria in Maastricht limestone Type A1 Journal article
  Year 1990 Publication The science of the total environment Abbreviated Journal
  Volume 94 Issue 3 Pages 209-220
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract The Maastricht limestone used for the construction of the 14th century O.L. Basilica in Tongeren, Belgium, is a light yellowish, porous, soft rock of the Late Cretaceous age. The limestone has a high carbonate content (> 95%); quartz and glauconite occur rarely. On the north side of the building, there is extensive growth of epilithic algae. On the south side, an assemblage of organisms was observed beneath the abiotic surface. This community, developed as a green layer 1 mm below the surface, is dominated by cyanobacteria. A moss was also present. The organisms were studied by transmitted light, phase contrast and scanning electron microscopy, and isolated in cultures. The cyanobacteria belong to the genera Synechococcus and Chroococcidiopsis, and the moss was identified as Tortula muralis Hedw. The organic matter present in the green layer was characterized in terms of molecular components using analytical pyrolysis. Pyrolysis products from polysaccharides and proteins, and evaporation/pyrolysis products from lipids, comprise the vast majority of identified compounds. The identification of specific biomarkers such as 7-methylheptadecane is further evidence of the presence of cyanobacteria. Phytenes and phytadienes are indicative of phototrophic organisms, as they are pyrolysis products from chlorophylls.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1990DF51800004 Publication Date 2003-09-12
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0048-9697; 1879-1026 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116654 Serial 7902
Permanent link to this record
 

 
Author Jha, P.K.; Subramanian, V.; Sitasawad, R.; Van Grieken, R.
  Title Heavy metals in sediments of the Yamura River (a tributary of the Ganges), India Type A1 Journal article
  Year 1990 Publication The science of the total environment Abbreviated Journal
  Volume 95 Issue Pages 7-27
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract Yamuna River sediments are more enriched in metals than those of the Ganges and average Indian river sediments. Variation of metals in suspended, bed and core sediment are due to the varying proportions of grain size and mineral content. Iron, Mn and Pb show a preference for the oxide fraction, whereas Cu and Zn are predominant in organic and carbonate fractions of sediments. Of the total elemental content, 80% Mn, 78% Fe, 69% Pb, 67% Cu and 55% Zn are available in chemically mobile phases of the sediments. The high partition coefficient of metals with respect to Mn suggests similar chemical mobility and preferences for solid phases. River sediments in the vicinity of Delhi show an increase in sorption of metals downstream, consequently metals are retained in sediments. The high correlation coefficient and significant regression relation among the metals indicate their similar behaviour during transport. At Allahabad, the contribution of the Yamuna to the Ganges is 3200 t Pb year−1, 12 100 t Zn year−1 and 8500 t Cu year−1 in particulate form.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1990DP94300002 Publication Date 2003-09-12
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0048-9697; 1879-1026 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116655 Serial 8026
Permanent link to this record
 

 
Author Eltayeb, M.A.H.; Van Grieken, R.E.
  Title Iron, copper, zinc and lead in hair from Sudanese populations of different age groups Type A1 Journal article
  Year 1990 Publication The science of the total environment Abbreviated Journal
  Volume 95 Issue Pages 157-165
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract Energy-dispersive X-ray fluorescence was used for the analysis of hair samples from three different age groups of the Sudanese population. Hair samples were digested in a mixture of nitric and perchloric acids and the metals were then precipitated with ammonium pyrrolidine dithiocarbamate. The variations of the Fe, Cu, Zn and Pb content of hair with age were investigated. The averages of the elemental concentrations in each age group were compared with the other age groups and with literature values. The correlation of each pair of elements in the hair samples was also investigated.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1990DP94300014 Publication Date 2003-09-12
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0048-9697; 1879-1026 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:116656 Serial 8132
Permanent link to this record
 

 
Author Deveirman, A.; van Landuyt, J.; Vanhellemont, J.; Maes, H.E.; Yallup, K.
  Title Defects in high-dose oxygen implanted silicon : a TEM study Type A1 Journal article
  Year 1991 Publication Vacuum: the international journal and abstracting service for vacuum science and technology T2 – 1ST SIOMX WORKSHOP ( SEPARATION BY IMPLANTATION OF OXYGEN ) ( SWI-88 ), NOV 07-08, 1988, UNIV SURREY, GUILDFORD, ENGLAND Abbreviated Journal Vacuum
  Volume 42 Issue 5-6 Pages 367-369
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract Results are discussed of a transmission electron microscopy study of high-dose oxygen implanted silicon. In addition to the general high temperature (> 1200-degrees-C) annealing treatments also annealings at 'low' temperatures (1000-1100-degrees-C) were performed in order to slow down the precipitate and defect reactions. The observed dissolution of the oxide precipitates during prolonged high temperature annealing is explained by critical radius considerations. Threading dislocations are the remaining lattice defects in the silicon overlayer and cannot be removed by further annealing. Low temperature annealing results in the formation and subsequent unfaulting of extrinsic stacking fault loops below the buried oxide layer.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Oxford Editor
  Language Wos (up) A1991EV61700007 Publication Date 2002-10-19
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0042-207X; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 1.858 Times cited 4 Open Access
  Notes Approved MATERIALS SCIENCE, MULTIDISCIPLINARY 96/271 Q2 #
  Call Number UA @ lucian @ c:irua:104022 Serial 629
Permanent link to this record
 

 
Author Amelinckx, S.; Van Tendeloo, G.; van Landuyt, J.
  Title The study of high Tc-superconducting materials by electron microscopy and electron diffraction Type A1 Journal article
  Year 1991 Publication Superconductor science and technology T2 – SATELLITE CONF TO THE 19TH INTERNATIONAL CONF ON LOW TEMPERATURE PHYSICS : HIGH TEMPERATURE SUPERCONDUCTIVITY, AUG 13-15, 1990, QUEENS COLL, CAMBRIDGE, ENGLAND Abbreviated Journal Supercond Sci Tech
  Volume 4 Issue s:[1] Pages S19-S34
  Keywords A1 Journal article; Electron microscopy for materials research (EMAT)
  Abstract A survey is given of the application of different electron microscopic techniques to the study of structural features of high T(c)-superconducting materials. Emphasis is laid in this contribution on those structural aspects for the study of which electron microscopy has been essential or has contributed to a significant extent.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Bristol Editor
  Language Wos (up) A1991FA42000004 Publication Date 2002-08-25
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0953-2048;1361-6668; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.325 Times cited 2 Open Access
  Notes Approved PHYSICS, APPLIED 47/145 Q2 #
  Call Number UA @ lucian @ c:irua:104503 Serial 3596
Permanent link to this record
 

 
Author Helm, M.; Peeters, F.M.; DeRosa, F.; Colas, E.; Harbison, J.P.; Florez, L.T.
  Title Infrared spectroscopy of subbands, minibands, and donors in GaAs/AlGaAs superlatices Type A3 Journal article
  Year 1992 Publication Surface science Abbreviated Journal
  Volume 263 Issue Pages 518-526
  Keywords A3 Journal article; Condensed Matter Theory (CMT)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1992HF18600104 Publication Date 0000-00-00
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited 5 Open Access
  Notes Approved CHEMISTRY, PHYSICAL 54/144 Q2 # PHYSICS, ATOMIC, MOLECULAR & CHEMICAL 9/35 Q2 #
  Call Number UA @ lucian @ c:irua:3028 Serial 1664
Permanent link to this record
 

 
Author Helm, M.; Peeters, F.M.; de Rosa, F.; Colas, E.; Harbison, J.P.; Florez, L.T.
  Title Infrared-spectroscopy of subbands, minibands, and donors in GaAs/AlGaAs superlattices Type A1 Journal article
  Year 1992 Publication Surface science : a journal devoted to the physics and chemistry of interfaces T2 – 9TH INTERNATIONAL CONF ON THE ELECTRONIC PROPERTIES OF TWO-DIMENSIONAL, SYSTEMS ( EP2DS-9 ) / 5TH INTERNATIONAL CONF ON MODULATED SEMICONDUCTOR, STRUCTURES ( MSS-5 ), JUL Abbreviated Journal Surf Sci
  Volume 263 Issue 1-3 Pages 518-526
  Keywords A1 Journal article; Condensed Matter Theory (CMT)
  Abstract A far-infrared absorption study of electrons in lightly-doped GaAs/Al0.3Ga0.7As superlattices is presented. Both weakly and strongly coupled superlattices are investigated, and the difference between intersubband transitions and transitions between extended minibands is demonstrated. At low temperatures, the absorption spectra are dominated by donor transitions. The 1s-2p(z) transition, which is intimately related to the intersubband transition, is observed. All experimental data are compared to an envelope function calculation for the miniband structure and a variational calculation for the donor energies. Excellent agreement between experiment and theory is achieved.
  Address
  Corporate Author Thesis
  Publisher Place of Publication Amsterdam Editor
  Language Wos (up) A1992HF18600104 Publication Date 2002-10-18
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0039-6028; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 1.925 Times cited 5 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:103055 Serial 1665
Permanent link to this record
 

 
Author Peeters, F.M.; Wu, X.G.; Devreese, J.T.; Watts, M.; Nicholas, R.J.; Howell, D.F.; van Bockstal, L.; Herlach, F.; Langerak, C.J.G.M.; Singleton, J.; Chevy, A.
  Title Resonant magnetopolaron coupling to both polar and neutral optical phonons in the layer compound InSe Type A1 Journal article
  Year 1992 Publication Surface science Abbreviated Journal Surf Sci
  Volume 263 Issue Pages 654-658
  Keywords A1 Journal article; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1992HF18600133 Publication Date 2002-10-18
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0039-6028; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 1.925 Times cited 4 Open Access
  Notes Approved
  Call Number UA @ lucian @ c:irua:2894 Serial 2887
Permanent link to this record
 

 
Author Peeters, F.M.; Devreese, J.T.
  Title Hot magneto-phonon and electro-phonon resonances in heterostructures Type A1 Journal article
  Year 1992 Publication Semiconductor science and technology: B Abbreviated Journal Semicond Sci Tech
  Volume 7 Issue Pages 15-20
  Keywords A1 Journal article; Condensed Matter Theory (CMT); Theory of quantum systems and complex systems
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1992HL26200006 Publication Date 2002-08-25
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0268-1242;1361-6641; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.19 Times cited 12 Open Access
  Notes Approved CHEMISTRY, MEDICINAL 9/59 Q1 # CHEMISTRY, MULTIDISCIPLINARY 40/163 Q1 # COMPUTER SCIENCE, INFORMATION SYSTEMS 6/144 Q1 # COMPUTER SCIENCE, INTERDISCIPLINARY 10/104 Q1 #
  Call Number UA @ lucian @ c:irua:2897 Serial 1491
Permanent link to this record
 

 
Author Kastalsky, A.; Peeters, F.M.; Chan, W.K.; Florez, L.T.; Harbison, J.P.
  Title Novel nonlinear transport phenomena in a triangular quantum well Type A1 Journal article
  Year 1992 Publication Semiconductor science and technology: B Abbreviated Journal Semicond Sci Tech
  Volume 7 Issue Pages 530-532
  Keywords A1 Journal article; Condensed Matter Theory (CMT)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1992HL26200140 Publication Date 2002-08-25
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0268-1242;1361-6641; ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor 2.19 Times cited 4 Open Access
  Notes Approved no
  Call Number UA @ lucian @ c:irua:3027 Serial 2380
Permanent link to this record
 

 
Author van Malderen, H.; Rojas, C.; Van Grieken, R.
  Title Characterization of individual giant aerosol particles above the North Sea Type A1 Journal article
  Year 1992 Publication Environmental science and technology Abbreviated Journal
  Volume 26 Issue Pages 750-756
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1992HL93600020 Publication Date 2005-03-17
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0013-936x; 1520-5851 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:2827 Serial 7625
Permanent link to this record
 

 
Author Dierck, I.; Michaud, D.; Wouters, L.; Van Grieken, R.
  Title Laser microprobe mass analysis of individual North Sea aerosol particles Type A1 Journal article
  Year 1992 Publication Environmental science and technology Abbreviated Journal
  Volume 26 Issue Pages 802-808
  Keywords A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
  Abstract
  Address
  Corporate Author Thesis
  Publisher Place of Publication Editor
  Language Wos (up) A1992HL93600028 Publication Date 2005-03-17
  Series Editor Series Title Abbreviated Series Title
  Series Volume Series Issue Edition
  ISSN 0013-936x; 1520-5851 ISBN Additional Links UA library record; WoS full record; WoS citing articles
  Impact Factor Times cited Open Access
  Notes Approved no
  Call Number UA @ admin @ c:irua:2828 Serial 8161
Permanent link to this record
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