Records |
Author |
Lenaerts, S.; Honoré, M.; Huyberechts, G.; Roggen, J.; Maes, G. |
Title |
In situ infrared and electrical characterization of tin dioxide gas sensors in nitrogen/oxygen mixtures at temperatures up to 720 K |
Type |
A1 Journal article |
Year |
1994 |
Publication |
Sensors and actuators : B : chemical |
Abbreviated Journal |
|
Volume |
19 |
Issue |
|
Pages |
478-482 |
Keywords |
A1 Journal article |
Abstract |
FT-IR spectroscopy and impedance measurements of tin dioxide sensor materials at working temperatures up to 450 °C in atmospheres with varying O2/N2 ratio are used as an in situ probe to study the interactions at the surface of the semiconducting oxide. Every diminution in the oxygen content above the sample induces a broad IR absorption band (X-band) between 2300700 cm−1 with a few small peaks in the 1400850 cm−1 region of the spectrum superimposed on it. The X-band results from the enchanced electron concentration in the bulk of the tin dioxide domain. The fine structure is due to the absorption of several kinds of surface oxygen species associated vibration modes. The porous tin dioxide consists of domains were the outward shell is depleted of electrons by the formation of adsorbed O− species on oxygen surface sites, SO(O− species. In our proposed model for the impedance data this gives rise to a parallel RpCp circuit for the domain boundary characteristics and to an Rs parameter for the intradomain resistance. The evolution of these IR and impedance spectroscopic effects with temperature and oxygen content is used to set up, to confirm and refine a physicochemical operation model of tin dioxide gas sensor. This model consists of a sensitizing reaction sequence in the presence of oxygen and a gas-detection reaction sequence when a reducing gas is present. Based on this model, the principal disadvantages of this type of gas sensor become clear. Every factor that influences the concentration of SO(O−) species, causes a conductance modification. If we can control and direct the nature, the number and the arrangement of the tin dioxide domains, a directed development and improvement of the sensor characteristics is possible. |
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Wos |
A1994NN90000040 |
Publication Date |
2002-07-25 |
Series Editor |
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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 |
0925-4005 |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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no |
Call Number |
UA @ admin @ c:irua:82014 |
Serial |
5962 |
Permanent link to this record |
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Author |
Honoré, M.; Lenaerts, S.; Desmet, J.; Huyberechts, G.; Roggen, J. |
Title |
Synthesis and characterization of tin dioxide powders for the realization of thick-film gas sensors |
Type |
A1 Journal article |
Year |
1994 |
Publication |
Sensors and actuators : B : chemical |
Abbreviated Journal |
|
Volume |
19 |
Issue |
|
Pages |
621-624 |
Keywords |
A1 Journal article |
Abstract |
Semiconductor gas sensors produced with screen-printing techniques and based on home-made tin dioxide inks are presented. The ink consists of home-made tin dioxide powder added to a polymer solution to make it screen printable on 96% alumina substrates. The major work is performed on the preparation and the characterization of pure undoped tin dioxide powder produced by two different synthetic pathways. Inks prepared with powders from each method are consecutively handled in an identical way to obtain gas sensors. The sensor response towards different gases is measured and compared for both types of starting materials. |
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Wos |
A1994NN90000073 |
Publication Date |
2002-07-25 |
Series Editor |
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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 |
0925-4005 |
ISBN |
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UA library record; WoS full record; WoS citing articles |
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no |
Call Number |
UA @ admin @ c:irua:82013 |
Serial |
5996 |
Permanent link to this record |
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Author |
Hoffman, B.M.; Lukoyanov, D.; Yang, Z.-Y.; Dean, D.R.; Seefeldt, L.C. |
Title |
Mechanism of Nitrogen Fixation by Nitrogenase: The Next Stage |
Type |
A1 Journal Article |
Year |
2014 |
Publication |
Chemical Reviews |
Abbreviated Journal |
Chem. Rev. |
Volume |
114 |
Issue |
8 |
Pages |
4041-4062 |
Keywords |
A1 Journal Article; Plasma, laser ablation and surface modeling Antwerp (PLASMANT) ; |
Abstract |
Ammonia is a crucial nutrient used for plant growth and as a building block in pharmaceutical and chemical industry, produced via nitrogen fixation of the ubiquitous atmospheric N2. Current industrial ammonia production relies heavily on fossil resources, but a lot of work is put into developing non-fossil based pathways. Among these is the use of nonequilibrium plasma. In this work, we investigated water vapor as H source for nitrogen fixation into NH3 by non-equilibrium plasma. The highest selectivity towards NH3 was observed with low amounts of added H2O vapor, but the highest production rate was reached at high H2O vapor. |
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Wos |
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Publication Date |
2014-04-23 |
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Series Title |
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Series Volume |
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Series Issue |
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Edition |
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ISSN |
0009-2665 |
ISBN |
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Notes |
We would like to thank Sylvia Dewilde (Department of Biomedical Sciences) for providing analytical equipment. |
Approved |
no |
Call Number |
PLASMANT @ plasmant @ |
Serial |
6337 |
Permanent link to this record |
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Author |
Chin, C.–M.; Battle, P.D.; Hunter, E.C.; Avdeev, M.; Hendrickx, M.; Hadermann, J. |
Title |
Magnetic properties of La3Ni2Sb Ta Nb1––O9; from relaxor to spin glass |
Type |
A1 Journal article |
Year |
2019 |
Publication |
Journal of solid state chemistry (Print) |
Abbreviated Journal |
Journal of Solid State Chemistry |
Volume |
273 |
Issue |
|
Pages |
175-185 |
Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
Abstract |
Neutron diffraction experiments conducted at 5 K in a magnetic field 0 < H/kOe < 50 have shown that the monoclinic perovskite La3Ni2TaO9 behaves as a relaxor ferromagnet. Compositions in the series La3Ni2SbxTayNb1–x–yO9 have been synthesized in polycrystalline form. Electron microscopy, X–ray diffraction and neutron diffraction have shown that the solid solutions are largely homogeneous and monophasic. Magnetometry and neutron diffraction have shown that the relaxor magnetisation persists in low fields when x + y = 1 but is rapidly diminished by the introduction of niobium. This change in magnetic behaviour is ascribed to the differences in the d–orbital energies of Sb5+, Nb5+ and Ta5+. |
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Wos |
000466261100026 |
Publication Date |
2019-03-02 |
Series Editor |
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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 |
0022-4596 |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Notes |
We thank EPSRC for funding through grant EP/M0189541. CMC thanks the Croucher Foundation and the University of Oxford for the award of a graduate scholarship. |
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no |
Call Number |
EMAT @ emat @c:irua:166445 |
Serial |
6346 |
Permanent link to this record |
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Author |
Bae, J.; Cichocka, M.O.; Zhang, Y.; Bacsik, Z.; Bals, S.; Zou, X.; Willhammar, T.; Hong, S.B. |
Title |
Phase transformation behavior of a two-dimensional zeolite |
Type |
A1 Journal article |
Year |
2019 |
Publication |
Angewandte Chemie: international edition in English |
Abbreviated Journal |
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Volume |
58 |
Issue |
30 |
Pages |
10230-10235 |
Keywords |
A1 Journal article; Electron microscopy for materials research (EMAT) |
Abstract |
Understanding the molecular-level mechanisms of phase transformation in solids is of fundamental interest for functional materials such as zeolites. Two-dimensional (2D) zeolites, when used as shape-selective catalysts, can offer improved access to the catalytically active sites and a shortened diffusion length in comparison with their 3D analogues. However, few materials are known to maintain both their intralayer microporosity and structure during calcination for organic structure-directing agent (SDA) removal. Herein we report that PST-9, a new 2D zeolite which has been synthesized via the multiple inorganic cation approach and fulfills the requirements for true layered zeolites, can be transformed into the small-pore zeolite EU-12 under its crystallization conditions through the single-layer folding process, but not through the traditional dissolution/recrystallization route. We also show that zeolite crystal growth pathway can differ according to the type of organic SDAs employed. |
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Wos |
000476452700030 |
Publication Date |
2019-05-22 |
Series Editor |
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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 |
1433-7851; 0570-0833 |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
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Times cited |
2 |
Open Access |
OpenAccess |
Notes |
We acknowledge financial support from National Creative Research Initiative Program (2012R1A3A-2048833) through the National Research Foundation of Korea, the National Research Council of Science & Technology (CRC-14-1-KRICT) grant by the Korea government (MSIP), the Swedish Research Council (2017-04321), and the Knut and Alice Wallenberg Foundation (KAW) through the project grant 3DEM-NATUR (2012.0112). T.W. acknowledges an international postdoc grant from the Swedish Research Council (2014-06948). |
Approved |
no |
Call Number |
UA @ admin @ c:irua:181233 |
Serial |
6878 |
Permanent link to this record |
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Author |
Reggers, C.; Van Grieken, R. |
Title |
2,2′-Diaminodiethylamine cellulose powder for trace metal preconcentrations from water |
Type |
A3 Journal article |
Year |
1984 |
Publication |
Fresenius' Zeitschrift für analytische Chemie |
Abbreviated Journal |
|
Volume |
317 |
Issue |
5 |
Pages |
520-526 |
Keywords |
A3 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
Cellulose powder with 2,2′-diaminodiethylamine (DEN) functional groups exhibits efficient complexation of transition metal cations. Collection yields above 85 % are obtained up to a chelation capacity of 1.5 meq per gram. Since a good collection is obtained for a pH up from 5, no pH adjustments have to be made for natural water samples. The cellulose-DEN powder is insensitive to abundant substances like alkali and alkaline earth ions, and humic matter. Some cations can be eluted efficiently in a small volume of HNO3. Blank concentration levels from the cellulose-DEN powder are reported. |
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Wos |
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Publication Date |
2004-11-17 |
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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 |
0016-1152 |
ISBN |
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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 |
no |
Call Number |
UA @ admin @ c:irua:116640 |
Serial |
7383 |
Permanent link to this record |
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Author |
Adams, F.C.; Van Grieken, R.E. |
Title |
Absorption correction for X-ray-fluorescence analysis of aerosol loaded filters |
Type |
A1 Journal article |
Year |
1975 |
Publication |
Analytical chemistry |
Abbreviated Journal |
|
Volume |
47 |
Issue |
11 |
Pages |
1767-1773 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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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 |
A1975AN45700013 |
Publication Date |
2005-03-08 |
Series Editor |
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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 |
0003-2700; 5206-882x |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Open Access |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:113639 |
Serial |
7408 |
Permanent link to this record |
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Author |
Markowicz, A.A.; Storms, H.M.; Van Grieken, R.E. |
Title |
Absorption correction in electron probe x-ray microanalysis of thin samples |
Type |
A1 Journal article |
Year |
1986 |
Publication |
Analytical chemistry |
Abbreviated Journal |
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Volume |
58 |
Issue |
7 |
Pages |
1282-1285 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Address |
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Corporate Author |
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Place of Publication |
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Language |
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Wos |
A1986C594100007 |
Publication Date |
2005-03-08 |
Series Editor |
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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 |
0003-2700; 5206-882x |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
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Open Access |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:116524 |
Serial |
7409 |
Permanent link to this record |
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Author |
Van Dyck, P.M.; Van Grieken, R.E. |
Title |
Absorption correction via scattered radiation in energy-dispersive X-ray fluorescence analysis for samples of variable composition and thickness |
Type |
A1 Journal article |
Year |
1980 |
Publication |
Analytical chemistry |
Abbreviated Journal |
|
Volume |
52 |
Issue |
12 |
Pages |
1859-1864 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Address |
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Corporate Author |
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Place of Publication |
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Wos |
A1980KJ65700021 |
Publication Date |
2005-03-08 |
Series Editor |
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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 |
0003-2700; 5206-882x |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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 |
Call Number |
UA @ admin @ c:irua:116516 |
Serial |
7410 |
Permanent link to this record |
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Author |
Jochems, P.; Mueller, T.; Satyawali, Y.; Diels, L.; Dejonghe, W.; Hanefeld, U. |
Title |
Active site titration of immobilized beta-galactosidase for the determination of active enzymes |
Type |
A1 Journal article |
Year |
2015 |
Publication |
Biochemical engineering journal |
Abbreviated Journal |
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Volume |
93 |
Issue |
|
Pages |
137-141 |
Keywords |
A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
Abstract |
In the present study, an active site titration method is demonstrated, to determine the amount of active enzyme (beta-galactosidase), immobilized on a support. Two types of supports were investigated, viz, amino acrylic resin and a mixed matrix membrane. Furthermore, 2',4'-dinitrophenyl 2-deoxy-2-fluoro-beta-D-galactopyranoside was used as an inhibitor for the active site titration of immobilized beta-galactosidase obtained from Kluyveromyces lactis. Using the active site titration, approximately 8.3 mg of active enzyme was found on 1 g of dried commercially available SPRIN imibond, which is an amino acrylic resin with covalently bound beta-galactosidase obtained from K. lactis. However, this method, in its present form, was not effective on the mixed matrix membranes due to the irreversible partial adsorption of the leaving group (2',4'-dinitrophenolate) by the membrane. This observation implied that it is important to investigate interactions between the support and the used inhibitor and leaving group. (C) 2014 Elsevier B.V. All rights reserved. |
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Wos |
000347362100018 |
Publication Date |
2014-10-23 |
Series Editor |
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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 |
1369-703x; 1873-295x |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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Open Access |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:123763 |
Serial |
7417 |
Permanent link to this record |
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Author |
Injuk, J.; Osán, J.; Van Grieken, R.; Tsuji, K. |
Title |
Airborne particles in the Miyagi Museum of Art in Sendai, Japan, studied by electron probe X-ray microanalysis and energy dispersive X-ray fluorescence analysis |
Type |
A1 Journal article |
Year |
2002 |
Publication |
Analytical sciences : the international journal of the Japan Society for Analytical Chemistry |
Abbreviated Journal |
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Volume |
18 |
Issue |
|
Pages |
561-566 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Corporate Author |
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Place of Publication |
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Language |
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Wos |
000175643000010 |
Publication Date |
2005-04-20 |
Series Editor |
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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 |
0910-6340; 1348-2246 |
ISBN |
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UA library record; WoS full record; WoS citing articles |
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Open Access |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:39519 |
Serial |
7433 |
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Author |
Jambers, W.; de Bock, L.; Van Grieken, R. |
Title |
Applications of micro-analysis to individual environmental particles |
Type |
A1 Journal article |
Year |
1996 |
Publication |
Fresenius' journal of analytical chemistry |
Abbreviated Journal |
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Volume |
355 |
Issue |
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Pages |
521-527 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Corporate Author |
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Place of Publication |
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Wos |
A1996UV61000015 |
Publication Date |
2004-03-24 |
Series Editor |
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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 |
0937-0633; 1432-1130 |
ISBN |
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UA library record; WoS full record; WoS citing articles |
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Open Access |
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no |
Call Number |
UA @ admin @ c:irua:14653 |
Serial |
7486 |
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Author |
Semenov, M.Y.; Khodzher, T.V.; Obolkin, V.A.; Domysheva, V.M.; Golobokova, L.P.; Kobeleva, N.A.; Netsvetaeva, O.G.; Potemkin, V.L.; Van Grieken, R.; Fukuzaki, N. |
Title |
Assessing the acidification risk in the Lake Baikal region |
Type |
A1 Journal article |
Year |
2006 |
Publication |
Chemistry and ecology |
Abbreviated Journal |
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Volume |
22 |
Issue |
1 |
Pages |
1-11 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Place of Publication |
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Wos |
000236110800001 |
Publication Date |
2006-03-02 |
Series Editor |
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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 |
0275-7540 |
ISBN |
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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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Open Access |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:56510 |
Serial |
7496 |
Permanent link to this record |
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Author |
Blockhuys, F.; Claes, M.; Van Grieken, R.; Geise, H.J. |
Title |
Assessing the molecular weight of a conducting polymer by grazing emission XRF |
Type |
A1 Journal article |
Year |
2000 |
Publication |
Analytical chemistry |
Abbreviated Journal |
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Volume |
72 |
Issue |
14 |
Pages |
3366-3368 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Place of Publication |
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Wos |
000088347100054 |
Publication Date |
2002-07-26 |
Series Editor |
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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 |
0003-2700; 5206-882x |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
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Times cited |
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Open Access |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:27915 |
Serial |
7497 |
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Author |
Idris, A.M.; Eltayeb, M.A.H.; Potgieter-Vermaak, S.S.; Van Grieken, R.; Potgieter, J.H. |
Title |
Assessment of heavy metals pollution in Sudanese harbours along the Red Sea Coast |
Type |
A1 Journal article |
Year |
2007 |
Publication |
Microchemical journal |
Abbreviated Journal |
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Volume |
87 |
Issue |
2 |
Pages |
104-112 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Place of Publication |
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Language |
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Wos |
000251750000003 |
Publication Date |
2007-07-05 |
Series Editor |
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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 |
0026-265x; 0026-265x |
ISBN |
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Additional Links |
UA library record; WoS full record; WoS citing articles |
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 |
Call Number |
UA @ admin @ c:irua:66067 |
Serial |
7504 |
Permanent link to this record |
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Author |
Injuk, J.; Van Grieken, R. |
Title |
Atmospheric concentrations and deposition of heavy metals over the North Sea: a literature review |
Type |
A1 Journal article |
Year |
1995 |
Publication |
Journal of atmospheric chemistry |
Abbreviated Journal |
|
Volume |
20 |
Issue |
|
Pages |
179-212 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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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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Language |
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Wos |
A1995RJ26500004 |
Publication Date |
2004-11-29 |
Series Editor |
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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 |
|
ISSN |
0167-7764 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
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 |
Call Number |
UA @ admin @ c:irua:12348 |
Serial |
7519 |
Permanent link to this record |
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|
|
Author |
Markowicz, A.A.; Van Grieken, R.E. |
Title |
Atomic number correction in electron probe X-ray microanalysis of curved samples and particles |
Type |
A1 Journal article |
Year |
1984 |
Publication |
Analytical chemistry |
Abbreviated Journal |
|
Volume |
56 |
Issue |
14 |
Pages |
2798-2801 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Place of Publication |
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Wos |
A1984TU34600040 |
Publication Date |
2005-03-08 |
Series Editor |
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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 |
|
Edition |
|
ISSN |
0003-2700; 5206-882x |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
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Times cited |
|
Open Access |
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Notes |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:116519 |
Serial |
7535 |
Permanent link to this record |
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Author |
Stroobants, N.; Dehairs, F.; Goeyens, L.; Vanderheijden, N.; Van Grieken, R. |
Title |
Barite formation in the Southern Ocean water column |
Type |
A1 Journal article |
Year |
1991 |
Publication |
Marine chemistry |
Abbreviated Journal |
|
Volume |
35 |
Issue |
|
Pages |
411-421 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Wos |
A1991GZ58500031 |
Publication Date |
2009-09-04 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0304-4203; 1872-7581 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
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 |
Call Number |
UA @ admin @ c:irua:664 |
Serial |
7550 |
Permanent link to this record |
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Author |
Blondiaux, E.; Bomon, J.; Smolen, M.; Kaval, N.; Lemière, F.; Sergeyev, S.; Diels, L.; Sels, B.; Maes, B.U.W. |
Title |
Bio-based aromatic amines from lignin-derived monomers |
Type |
A1 Journal article |
Year |
2019 |
Publication |
ACS Sustainable Chemistry and Engineering |
Abbreviated Journal |
|
Volume |
7 |
Issue |
7 |
Pages |
6906-6916 |
Keywords |
A1 Journal article; Engineering sciences. Technology; Organic synthesis (ORSY); Sustainable Energy, Air and Water Technology (DuEL) |
Abstract |
A new approach to synthesize valuable 3,4-dialkoxyanilines and alkyl propionates from lignin-derived 4-propylguaiacol and -catechol with overall isolated yields up to 65% has been described. The strategy is based on the introduction of nitrogen via a Beckmann rearrangement. Amino introduction therefore coincides with a C-defunctionalization reaction; overall a replacement of the propyl chain by an amino group is obtained. The process only requires cheap bulk chemicals as reagents/reactants and does not involve column chromatography to purify the reaction products. Furthermore, all carbon atoms from the biorenewable lignin-derived monomers are transformed into valuable compounds. Greenness was assessed by performing a Green Metrics analysis on two dialkoxyanilines. A comparison was made with literature routes for these compounds starting from a petrochemical substrate. |
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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 |
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Wos |
000463462100050 |
Publication Date |
2019-02-14 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
2168-0485 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
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 |
Call Number |
UA @ admin @ c:irua:159378 |
Serial |
7556 |
Permanent link to this record |
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Author |
Markowicz, A.A.; Storms, H.M.; Van Grieken, R.E. |
Title |
Bremsstrahlung background in electron-probe X-ray-microanalysis of thin films |
Type |
A1 Journal article |
Year |
1985 |
Publication |
Analytical chemistry |
Abbreviated Journal |
|
Volume |
57 |
Issue |
14 |
Pages |
2885-2889 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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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 |
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Wos |
A1985AVD0100033 |
Publication Date |
2005-03-08 |
Series Editor |
|
Series Title |
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Abbreviated Series Title |
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Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0003-2700; 5206-882x |
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:113616 |
Serial |
7567 |
Permanent link to this record |
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|
|
Author |
Serneels, S.; Faber, K.; Verdonck, T.; van Espen, P.J. |
Title |
Case specific prediction intervals for tri-PLS1 : the full local linearisation |
Type |
A1 Journal article |
Year |
2011 |
Publication |
Chemometrics and intelligent laboratory systems |
Abbreviated Journal |
|
Volume |
108 |
Issue |
2 |
Pages |
93-99 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
A new method to estimate case specific prediction uncertainty for univariate trilinear partial least squares (tri-PLS1) regression is introduced. This method is, from a theoretical point of view, the most exact finite sample approximation to true prediction uncertainty that has been reported up till now. Using the new method, different error sources can be propagated, which is an advantage that cannot be offered by data driven approaches such as the bootstrap. In a concise example, it is illustrated how the method can be applied. In the Appendix, efficient algorithms are presented to compute the estimates required. |
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 |
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Wos |
000295310000002 |
Publication Date |
2011-05-12 |
Series Editor |
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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 |
|
Edition |
|
ISSN |
0169-7439; 1873-3239 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
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Times cited |
|
Open Access |
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Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:92788 |
Serial |
7580 |
Permanent link to this record |
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|
|
Author |
Roegiers, J.; van Walsem, J.; Denys, S. |
Title |
CFD- and radiation field modeling of a gas phase photocatalytic multi-tube reactor |
Type |
A1 Journal article |
Year |
2018 |
Publication |
Chemical engineering journal |
Abbreviated Journal |
|
Volume |
338 |
Issue |
|
Pages |
287-299 |
Keywords |
A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
Abstract |
This paper focusses on the development of a Multiphysics model as a tool for assessing the performance of a multi-tube photoreactor. The model predicts the transient behavior of acetaldehyde concentration, as a model compound for the organic fraction of the indoor air pollutants, under varying sets of conditions. A 3D-model couples radiation field modeling with reaction kinetics and fluid dynamics in order to simulate the transport of the pollutant as it progresses through the reactor. A model-based approach is proposed to determine the layer thickness and refractive index of different P25-powder modified solgel coatings, using an optimization procedure to estimate these parameters based on UV-irradiance measurements. The radiation field model was able to accurately predict the irradiance on the catalytic surface within the reactor. Consequently, the radiation field model was used to define an irradiance dependent reaction rate constant in a coupled Multiphysics model. An optimization routine was deployed to estimate the adsorption, desorption- and photocatalytic reaction rate constants on the TiO2-surface, using experimentally determined, transient outlet concentrations of acetaldehyde. Additionally, a validation test was performed in an air-tight climate chamber at much higher flow rates, higher irradiance and realistic indoor pollutant concentrations to emphasize the reliability and accuracy of the parameters for adsorption, desorption and photocatalytic reaction. The developed model makes it possible to optimize the reactor design and scale-up for commercial applications. |
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 |
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Wos |
000427618400031 |
Publication Date |
2018-01-08 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
|
Series Issue |
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Edition |
|
ISSN |
1385-8947; 1873-3212 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
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Times cited |
|
Open Access |
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Notes |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:149115 |
Serial |
7589 |
Permanent link to this record |
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|
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Author |
Roegiers, J.; Denys, S. |
Title |
CFD-modelling of activated carbon fibers for indoor air purification |
Type |
A1 Journal article |
Year |
2019 |
Publication |
Chemical engineering journal |
Abbreviated Journal |
|
Volume |
365 |
Issue |
|
Pages |
80-87 |
Keywords |
A1 Journal article; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL) |
Abstract |
Activated carbon fibers for indoor air purification were investigated by means of pressure drop and adsorption capacity. The Darcy-Forchheimer law combined with Computational Fluid Dynamics (CFD) modelling was deployed to simulate the pressure drop over an activated carbon fiber (ACF) filter with varying filter thickness. The CFD model was later combined with adsorption modelling to simulate breakthrough profiles of acetaldehyde adsorption on the ACF-filter. The adsorption model incorporates mass transfer resistance and adsorption equilibrium. It assumes local equilibrium between gas phase and solid phase. The latter was investigated for three different adsorption isotherms: linear, Langmuir and Freundlich adsorption. Successful agreement between model simulations and experimental data was obtained, using the Freundlich adsorption model. The numerical model could provide valuable insights and allows to continuously improve the design of filtration devices. |
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 |
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Wos |
000459009800009 |
Publication Date |
2019-02-02 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
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Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
1385-8947; 1873-3212 |
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:156996 |
Serial |
7590 |
Permanent link to this record |
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|
Author |
Worobiec, A.; Stefaniak, E.A.; Potgieter-Vermaak, S.; Sawlowicz, Z.; Spolnik, Z.; Van Grieken, R. |
Title |
Characterisation of concentrates of heavy mineral sands by micro-Raman spectrometry and CC-SEM/EDX with HCA |
Type |
A1 Journal article |
Year |
2007 |
Publication |
Applied geochemistry |
Abbreviated Journal |
|
Volume |
22 |
Issue |
9 |
Pages |
2078-2085 |
Keywords |
A1 Journal article; Laboratory Experimental Medicine and Pediatrics (LEMP); AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
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Corporate Author |
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Thesis |
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Publisher |
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Place of Publication |
|
Editor |
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Language |
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Wos |
000249906600017 |
Publication Date |
2007-06-06 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0883-2927 |
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:65011 |
Serial |
7594 |
Permanent link to this record |
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|
|
Author |
Baken, S.; Sjostedt, C.; Gustafsson, J.P.; Seuntjens, P.; Desmet, N.; De Schutter, J.; Smolders, E. |
Title |
Characterisation of hydrous ferric oxides derived from iron-rich groundwaters and their contribution to the suspended sediment of streams |
Type |
A1 Journal article |
Year |
2013 |
Publication |
Applied geochemistry |
Abbreviated Journal |
|
Volume |
39 |
Issue |
|
Pages |
59-68 |
Keywords |
A1 Journal article; Sustainable Energy, Air and Water Technology (DuEL) |
Abstract |
When Fe(II) bearing groundwaters surface in streams, particulate authigenic Fe-rich material is produced by oxidation. Such freshly precipitated Fe minerals may be transported as suspended sediment and have a profound impact on the fate of trace metals and nutrients in rivers. The objective of this study was to monitor changes in mineralogy and composition of authigenic material from its source to streams of increasing order. Groundwaters, surface waters, and suspended sediment in streams of different order were sampled in the Kleine Nete catchment (Belgium), a lowland with Fe-rich groundwaters (3.5-53.8 mg Fe/L; pH 6.3-6.9). Fresh authigenic material (>0.45 mu m) was produced by oxidising filtered (<0.45 mu m) groundwater and surface water. This material contained, on average, 44% Fe, and smaller concentrations of C, P, and Ca. Iron EXAFS (Extended X-ray Absorption Fine Structure) spectroscopy showed that the Fe was present as poorly crystalline hydrous ferric oxides with a structure similar to that of ferrihydrite. The Fe concentration in the suspended sediment samples decreased to 36-40% (stream order 2), and further to 18-26% (stream order 4 and 5). Conversely, the concentrations of organic C, Ca, Si, and trace metals increased with increasing stream order, suggesting mixing of authigenic material with suspended sediment from a different source. The Fe speciation in the suspended sediment was similar to that in fresh authigenic material, but more Fe-Fe interactions were observed, i.e. it was increasingly hydrolysed, suggesting ageing reactions. The suspended sediment in the streams of order 4 and 5 is estimated to contain between 31% and 59% of authigenic material, but more data are needed to refine this estimate. The authigenic material is an important sink for P in these streams which may alleviate the eutrophication risk in this catchment. (C) 2013 Elsevier Ltd. All rights reserved. |
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Corporate Author |
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Publisher |
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Place of Publication |
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Language |
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Wos |
000327488700007 |
Publication Date |
2013-10-05 |
Series Editor |
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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 |
|
ISSN |
0883-2927 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
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Times cited |
|
Open Access |
|
Notes |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:112769 |
Serial |
7595 |
Permanent link to this record |
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|
Author |
Smekens, A.; Godoi, R.H.M.; Berghmans, P.; Van Grieken, R. |
Title |
Characterisation of soot emitted by domestic heating, aircraft and cars using diesel or biodiesel |
Type |
A1 Journal article |
Year |
2005 |
Publication |
Journal of atmospheric chemistry |
Abbreviated Journal |
|
Volume |
52 |
Issue |
1 |
Pages |
45-62 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
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 |
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Wos |
000232793100003 |
Publication Date |
2005-10-21 |
Series Editor |
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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 |
|
Edition |
|
ISSN |
0167-7764 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
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Times cited |
|
Open Access |
|
Notes |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:55211 |
Serial |
7601 |
Permanent link to this record |
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|
Author |
Smits, J.A.; Van Grieken, R.E. |
Title |
Characterization of a 2,2'-diaminodiethylamine-cellulose filter toward metal cation extraction |
Type |
A1 Journal article |
Year |
1980 |
Publication |
Analytical chemistry |
Abbreviated Journal |
|
Volume |
52 |
Issue |
9 |
Pages |
1479-1489 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Address |
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Corporate Author |
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Place of Publication |
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Language |
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Wos |
A1980KB79500027 |
Publication Date |
2005-03-08 |
Series Editor |
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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 |
0003-2700; 5206-882x |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
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 |
Call Number |
UA @ admin @ c:irua:116515 |
Serial |
7610 |
Permanent link to this record |
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|
Author |
Wonders, J.H.A.M.; Houweling, S.; de Bont, F.A.J.; van Leeuwen, H.P.; Eeckhaoudt, S.M.; Van Grieken, R. |
Title |
Characterization of aerosol-associated lead by DPASV and LAMMA |
Type |
A1 Journal article |
Year |
1994 |
Publication |
International journal of environmental analytical chemistry |
Abbreviated Journal |
|
Volume |
56 |
Issue |
|
Pages |
193-205 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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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 |
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Wos |
A1994PF99800002 |
Publication Date |
2007-07-07 |
Series Editor |
|
Series Title |
|
Abbreviated Series Title |
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Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0306-7319 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
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Times cited |
|
Open Access |
|
Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:9514 |
Serial |
7611 |
Permanent link to this record |
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|
Author |
Palacios, O.M.; van Meel, K.; Van Grieken, R.; Marcó P., L.-M.; Vázquez, C. |
Title |
Characterization of black volcanites from the Limay river basin, Patagonia, Argentina, using energy dispersive X-ray fluorescence spectrometry : an aid to infer human group mobility |
Type |
A1 Journal article |
Year |
2013 |
Publication |
Journal of radioanalytical and nuclear chemistry |
Abbreviated Journal |
|
Volume |
298 |
Issue |
2 |
Pages |
1245-1255 |
Keywords |
A1 Journal article; Engineering sciences. Technology; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
The investigation of hunter-gatherers archaeological sites in the Limay river basin, Patagonia, Argentina, raised questions concerning the lithic technology. The chemical characterization of artifacts, rocks and possible sources of provenances could help to elucidate the hunter-gatherer mobility. In three archaeological sitesRincón Chico 2 (RCh2/87; 14C 710 ± 60 BP), Cueva Traful I (CTI; 14C 9430 ± 230 BP) and Casa de Piedra de Ortega (CPO; 14C 2840 ± 80 BP), tools and debitage or discarded flakes made in black volcanic rock have been found. Nearby an extensive rock outcrop of black volcanite, Paso Limay quarry (CPL), with similar characteristics was located. Samples coming from these four sites were analyzed by energy dispersive X-ray fluorescence spectrometry. This characterization allowed the geochemical classification of the lithic material and to correlate the samples with the suspected source after a previous statistical analysis. The majority of the samples were classified as dacites and rhyolites. Only samples coming from CPO site, the closest place to CPL were made exclusively with the quarry rocks. A set of five samples from RCh2/87 and two samples from CTI appear to have same chemical composition as CPL in spite of this site is placed in the opposite bank of the Limay river suggesting that hunter-gatherers could accede to the quarry, eventually. Finally, only a set of five samples coming from RCh2/87 and CTI do not group with the quarry. This fact evidences the existence of secondary sources of supply. The information of this research allowed inferring ancient human mobility patterns in the region. |
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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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Language |
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Wos |
000325624300061 |
Publication Date |
2013-07-25 |
Series Editor |
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Series Title |
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Abbreviated Series Title |
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Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0236-5731; 1588-2780 |
ISBN |
|
Additional Links |
UA library record; WoS full record |
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 |
Call Number |
UA @ admin @ c:irua:109743 |
Serial |
7619 |
Permanent link to this record |
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|
|
Author |
Wouters, L.; Bernard, P.; Van Grieken, R. |
Title |
Characterization of individual estuarine and marine particles by LAMMA and EPXMA |
Type |
A1 Journal article |
Year |
1988 |
Publication |
International journal of environmental analytical chemistry |
Abbreviated Journal |
|
Volume |
34 |
Issue |
1 |
Pages |
17-29 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
Laser microprobe mass analysis (LAMMA) was applied to particulate matter from the Atlantic Ocean. Inferring information about the surface layer by LAMMA was not probe X-ray microanalysis (EPXMA). Geochemically relevant groups of particles had been identified by EPXMA and cluster analysis. For both locations, the most abundant ones appeared to be those rich in silicon and the alumino-silicates. Afterwards LAMMA was applied to obtain more information about the trace element composition and surface characteristics. The iron-rich phase appeared to contain significant amounts of heavy metals and of phosphate. Lead appeared to be associated in detectable amounts with alumino-silicates in the Scheldt but not with those in the Atlantic Ocean. Inferring information about the surface layer by LAMMA was not always unambiguous. |
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 |
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Wos |
A1988Q274200002 |
Publication Date |
2007-07-07 |
Series Editor |
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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 |
|
ISSN |
0306-7319 |
ISBN |
|
Additional Links |
UA library record; WoS full record; WoS citing articles |
Impact Factor |
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Times cited |
|
Open Access |
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Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:116577 |
Serial |
7624 |
Permanent link to this record |