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Author |
Pilehvar, S. |
Title |
Development of new strategies for electrochemical aptasensing |
Type |
Doctoral thesis |
Year |
2016 |
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Pages |
198 p. |
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Doctoral thesis; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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UA @ admin @ c:irua:133790 |
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7802 |
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Author |
Alfeld, M.W. |
Title |
Development of scanning macr-XRF for the investigation of historical paintings |
Type |
Doctoral thesis |
Year |
2013 |
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Pages |
264 p. |
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Doctoral thesis; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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UA @ admin @ c:irua:111339 |
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7803 |
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Author |
Blidar, A.-M. |
Title |
The development of sensitive and selective electrochemical methods for the detection of antibiotics |
Type |
Doctoral thesis |
Year |
2021 |
Publication |
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Pages |
139 p. |
Keywords |
Doctoral thesis; Pharmacology. Therapy; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Antwerp Electrochemical and Analytical Sciences Lab (A-Sense Lab) |
Abstract |
The discovery of antibiotics represented one of the greatest breakthroughs in medicine. Their success combined with an increasing intensive use is apparently bound to be also their undoing. This is due to the development of acquired antibiotic resistance, leading to inefficient antibiotherapy and even to the impossibility of treatment and death. The development and spread of antibiotic resistance are fueled by the widespread presence of trace levels of antibiotics residue, in various media, from environment to aliments. One of the solutions is the rigorous monitoring of the levels of antibiotics, which in term requires an almost constant development of new, more accessible analytical methods, especially screening methods, capable of decentralized analysis. In this direction, the electrochemical detection of antibiotics represents a very viable alternative. In this context, the aim of this thesis was to develop new electrochemical methods for the detection of antibiotics by employing and expanding on several strategies, like biomimetic sensors and electrochemical fingerprinting. Five studies were described in this thesis, that can be roughly divided in three categories, based on the analytical strategy employed. The first group is represented by direct electrochemical methods. The second group focuses on the use of biomimetic elements, molecularly imprinted polymers and aptamers. The hyphenation of electrochemical methods with other analytical methods was explored in the last group. In the last study, included in this group, the singlet oxygen-based photoelectrochemical approach was used for the detection of a phenolic antibiotic, rifampicin. The originality of the thesis consists in the testing and development of new approaches to various strategies used in electrochemical detection, revealing new insights in the field of electrochemical detection of antibiotics. The complex electrochemical fingerprint and the mechanism of the electrochemical oxidation were created and investigated, respectively, for the antibiotic vancomycin. New sensitive nanoplatforms were prepared by employing and combining new protocols. Additionally, important contributions were brought through the study involving the singlet oxygen-based detection of rifampicin. We demonstrated how a photocatalyst can exhibit analyte selectivity by strongly interacting with a complex phenolic compound, rifampicin. Summing up, the studies presented in this thesis will have an important impact in the field of electrochemical detection of antibiotics. |
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Most recent IF: NA |
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UA @ admin @ c:irua:182955 |
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7804 |
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Author |
Bruynseels, F.; Van Grieken, R. |
Title |
Direct detection of sulfate and nitrate layers on sampled marine aerosols by laser microprobe mass analysis |
Type |
A1 Journal article |
Year |
1985 |
Publication |
Atmospheric environment |
Abbreviated Journal |
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Volume |
19 |
Issue |
11 |
Pages |
1969-1970 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
The direct detection of sulfate and nitrate layers on sampled marine aerosols was carried out by laser microprobe mass analysts. |
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2003-08-06 |
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0004-6981 |
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no |
Call Number |
UA @ admin @ c:irua:113617 |
Serial |
7810 |
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Author |
Eisma, D.; Kalf, J.; Karmini, M.; Mook, W.G.; Van Put, A.; Bernard, P.; Van Grieken, R. |
Title |
Dispersal of suspended matter in Makasar Strait and the Flores Basin |
Type |
A1 Journal article |
Year |
1989 |
Publication |
Netherlands journal of sea research |
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Volume |
24 |
Issue |
4 |
Pages |
383-398 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
In November 1984 in Makasar and the Flores Basin water samples were collected (T, S, dissolved O2, total CO2), bottom samples (sediment composition) and suspended matter (particle composition, particle size). A sediment trap was moored in the Flores Basin at 4600 m depth for nearly four months, covering the dry season. In the Flores Basin there are indications for bottom flow resuspending bottom material or preventing suspended material from settling; in Makasar Strait there is probably inflow of deep water both from the south and from the north, resulting in a very slow bottom water flor. Bottom deposits in Makasar Strait and the Flores Basin are predominantly terrigenous, with an admixture of organic carbonate and silica (mostly coccoliths). Volcanic material is primarily present near to the volcanoes in the south and reaches the deeper basins by slumping. In the suspended matter no volcanic particles and little planktonic material were found, although the latter form 10 to 15% of the top sediment and of the material deposited in the sediment trap. In suspension particles with a large concentration of tin (Sn) were found associated mainly with iron. They probably come from northern Kalimantan or northern Sulawesi. Suspended matter concentrations were mainly less than 0.5 mg·dm−3, only off the Mahakam river mouth were concentrations higher than 1 mg·dm−3. Particle size was erratic because of the variable composition of the coarser particles in suspension. Organic matter concentrations in suspension (in mg·dm−3) roughly follow the distribution of total suspended matter but organic content (in %) of the suspended matter does not show any trends. All organic matter in suspension is of marine origin except in the Mahakam river and estuary. Deposition rates, as estimated from the sediment trap results, are 150 mg·cm−2·a−1 for the total sediment, 26 mg·cm−2·a−1 for carbonate and 13 mg·cm−2·a−1 for organic matter. Flocs and fibres in suspension were only found in and below the Mahakam river plume that reaches ca 400 km from the river mouth to the southeast, and in surface waters associated with plankton (diatoms). The formation of these flocs (broken-up macroflocs or marine snow) is primarily related to particle concentration, turbulence, and the presence of organisms that produce sticky material or glue particles together. |
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2003-08-07 |
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0077-7579; 1873-1406 |
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no |
Call Number |
UA @ admin @ c:irua:116825 |
Serial |
7814 |
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Author |
Van Grieken, R. |
Title |
Dispersion of heavy metals |
Type |
H3 Book chapter |
Year |
1998 |
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Pages |
319-324
T2 - Report on the environment and nature |
Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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no |
Call Number |
UA @ admin @ c:irua:22777 |
Serial |
7816 |
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Author |
Eisma, D.; van Put, A.; Van Grieken, R. |
Title |
Distribution and composition of suspended matter around Sumbawa Island, Indonesia |
Type |
A3 Journal article |
Year |
1992 |
Publication |
Mitteilungen aus dem Geologisch-Paläontologischen Institut der Universität Hamburg |
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70 |
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Pages |
137-147 |
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A3 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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0072-1115 |
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no |
Call Number |
UA @ admin @ c:irua:2849 |
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7817 |
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Author |
Rutten, I.; Safdar, S.; Ven, K.; Daems, D.; Spasic, D.; Lammertyn, J. |
Title |
A DNA nanotechnology toolbox for mix-and-match biosensor design |
Type |
P3 Proceeding |
Year |
2019 |
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P3 Proceeding; Engineering sciences. Technology; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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no |
Call Number |
UA @ admin @ c:irua:166107 |
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7819 |
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Janssen, E.; Kontozova-Deutsch, V.; Krupińska, B.; Moris, H.; Peckstadt, A.; van Bos, M.; Watteeuw, L.; Van Grieken, R. |
Title |
Do gaseous pollutants and particulate matter endanger our world heritage? A study in the Museum Plantin-Moretus, Antwerp |
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P3 Proceeding |
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2010 |
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P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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no |
Call Number |
UA @ admin @ c:irua:85520 |
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7820 |
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Author |
Muhammad, S.; Wuyts, K.; De Wael, K.; Samson, R. |
Title |
Does leaf micro-morphology influence the recognition of particles on SEM images? |
Type |
A3 Journal article |
Year |
2021 |
Publication |
International Journal of Environmental Pollution and Remediation |
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9 |
Issue |
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Pages |
22-37 |
Keywords |
A3 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Antwerp Electrochemical and Analytical Sciences Lab (A-Sense Lab) |
Abstract |
Scanning electron microscopy (SEM) remains a popular approach to determine the shape, size, density and elemental composition of particles collected on leaf surfaces, but the effect of leaf micro-morphology on particle counts is not very well known. In this study, leaves of sixteen urban plant species were examined for particle density in June and September 2016 using SEM. The investigated plant species differed in leaf micro-morphology involving trichomes, raised stomata, epicuticular wax crystals and convex epidermal cells forming deep grooves between cells. The particle density on leaves of the investigated plant species was estimated by particle size fraction and leaf side. Particle density was significantly higher on the adaxial (AD) leaf side compared to the abaxial (AB) leaf side and higher for fine-particles than coarse-particles. The effect of trichome density on particle density of the AB and the AD leaf side was indicated to be significant and positive for both coarse and fine-particles in June but not in September. The successive repeated measurements elucidated that features constructing the topography of a leaf surface such as trichomes, stomata, and epidermal cells frequently contributed towards the edge enhancement effect, resulting in exaggerated particle counts. Besides, the mechanical drift contributed to the disparity in particle density measurements. Lastly, the reduction in particle density between successive measurements were imputed on the charging effect. These results enable us to suggest that in addition to characterization of micro-morphological features on a leaf surface, SEM will continue to be a useful approach for determining the particle: shape, size, elemental composition and density of the deposited particles. Nonetheless, the disparity in particle density measurements can occur due to abnormal particle recognition. Based on the results of September, we recommend that within-session successive repeated measurements (~ n ≥ 5) need to be performed to remove measurement uncertainties and obtain reliable quantitative data of particle counts using SEM. |
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Publication Date |
2021-09-15 |
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OpenAccess |
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Most recent IF: NA |
Call Number |
UA @ admin @ c:irua:181797 |
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7822 |
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Author |
Verbueken, A.H.; Jacob, W.A.; Frederik, P.M.; Busing, W.M.; Hersten, R.C.; Van Grieken, R.E. |
Title |
Doped albumin : stndardization possibilities for LAMMA-analysis of thin freeze-dried cryosections of biological tissue |
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A1 Journal article |
Year |
1984 |
Publication |
Journal de physique |
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45 |
Issue |
C:2 |
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561-564 |
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A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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0302-0738 |
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no |
Call Number |
UA @ admin @ c:irua:116708 |
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7823 |
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Author |
Geerts, R.; Vandermoere, F.; Halet, D.; Joos, P.; Van Den Steen, K.; Van Meenen, E.; Blust, R.; Van Winckel, T.; Vlaeminck, S. |
Title |
Drinking waste? An exploration of public support for wastewater reuse in Flanders |
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P3 Proceeding |
Year |
2020 |
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P3 Proceeding; Sociology; Engineering sciences. Technology; Sustainable Energy, Air and Water Technology (DuEL); Centre for Research on Environmental and Social Change |
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Most recent IF: NA |
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UA @ admin @ c:irua:186706 |
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7825 |
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Author |
Rojas, C.M.; Otten, P.M.; Van Grieken, R.E.; Laane, R. |
Title |
Dry aerosol deposition over the North Sea estimated from aircraft measurements |
Type |
H3 Book chapter |
Year |
1991 |
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419-425
T2 - Air pollution modeling and its applic |
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H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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UA @ admin @ c:irua:680 |
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7826 |
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Author |
Shaw, P. |
Title |
Dual action of reactive species as signal and stress agents in plasma medicine : combined computational and experimental research |
Type |
Doctoral thesis |
Year |
2021 |
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Abbreviated Journal |
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Pages |
191 p. |
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Doctoral thesis; Plasma Lab for Applications in Sustainability and Medicine – Antwerp (PLASMANT); Center for Oncological Research (CORE) |
Abstract |
Reactive oxygen and nitrogen species (RONS) generated by cold atmospheric plasma (CAP) can activate discrete signaling transduction pathways or disrupt redox cellular homeostasis, depending on their concentration. This makes that CAP possesses therapeutic potential towards wound healing, cancer, and other diseases. In order to effectively use CAP in the clinic, a clear understanding of the interaction of RONS with biomolecules (lipids, proteins and nucleic acids) from the atomic to the macro scale, and their biological significance, is needed. In this work, I have therefore studied the dual role of CAP-derived RONS, i.e., (i) in the signaling pathways involved in wound healing, and (ii) in their reaction with biomolecules to cause oxidation-mediated damage. I performed computer simulations to provide fundamental insight about the occurring processes that are difficult or even impossible to obtain experimentally. Furthermore, next to computational studies, I used both 2D and 3D tissue cultures. 3D model allows proliferation in a more physiologically relevant geometry that stimulates the production of extracellular matrix proteins. I investigated the treatment of human gingival fibroblasts with low doses of CAP-generated RONS. This treatment demonstrated that it can inhibit colony formation but does not induce cell death, induce the expression of metalloprotease proteins, induce extracellular matrix degradation, and promote cell migration, which could result in enhanced wound healing. In contrast, at high concentrations, RONS can disrupt the cell membrane integrity and induce cancer cell death through oxidative stress-mediated pathways. I discovered how oxidation of the cell membrane (lipid-peroxidation) can facilitate the access of a drug (Melittin) into cancer cells, and in this way, reduce the required therapeutic dose of Melittin in melanoma and breast cancer cells (demonstrated using in vitro, in ovo and in silico approaches). Furthermore, I studied how excessive lipid-oxidation in chemoresistant pancreatic cancer cells promotes ferroptotic cell death. This was due to the stimulation of the iron-dependent Fenton reaction by targeting a redox specific signaling network. However, upon oxidative stress, cells protect themselves via a sophisticated intracellular antioxidant system that involves the regulation of glutathione/glutathione peroxidase 4 (lipid repair enzyme). Cancer cells exhibited increased levels of intracellular RONS due to their hyper metabolism, leading to high expression of anti-oxidant systems. I therefore focus on the effect of reactive species on the intracellular anti-oxidant system and corresponding DNA damages in both temozolomide-sensitive as well as temozolomide-resistant glioblastoma spheroids, in a 3-dimensional tumor model with a more complex tumor microenvironment than cell monolayers. |
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Most recent IF: NA |
Call Number |
UA @ admin @ c:irua:183751 |
Serial |
7828 |
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Author |
Reniers, G.L.L.; Sörensen, K.; Vrancken, K. |
Title |
Editorial introduction |
Type |
H1 Book chapter |
Year |
2013 |
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Pages |
1-6
T2 - Management principles of sustainable indu |
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H1 Book chapter; Engineering Management (ENM); Sustainable Energy, Air and Water Technology (DuEL) |
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9783527649488 |
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no |
Call Number |
UA @ admin @ c:irua:107601 |
Serial |
7833 |
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|
|
Author |
Keppens, E.; Roekens, E.; Van Grieken, R. |
Title |
Effect of pollution on sandy limestones of a historical cathedral in Belgium |
Type |
P3 Proceeding |
Year |
1985 |
Publication |
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Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Keywords |
P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:117499 |
Serial |
7838 |
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|
Author |
Leysen, L.; Roekens, E.; Van Grieken, R. |
Title |
Effecten van luchtverontreiniging op historische gebouwen |
Type |
P3 Proceeding |
Year |
1987 |
Publication |
|
Abbreviated Journal |
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Volume |
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Issue |
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Pages |
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Keywords |
P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:117518 |
Serial |
7839 |
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|
Author |
Bernardi, A.; Becherini, F.; Kontozova, V.; Godoi, R.H.M.; Van Grieken, R.; Deutsch, F. |
Title |
Effects of air pollution and microclimate on stained glass windows: prliminary results in the Sainte Chapelle (Paris) |
Type |
H3 Book chapter |
Year |
2004 |
Publication |
|
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
133-140
T2 - Air pollution and cultural heritage / |
Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:48940 |
Serial |
7843 |
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Author |
Van Grieken, R.; Vleugels, G.; Sweevers, E.; Dewolfs, R. |
Title |
Effects of air pollution on historic buildings and monuments (1986-1990): scientific basis for conservation: analytical study of the weathering of building stones under field-exposure conditions |
Type |
A3 Journal article |
Year |
1994 |
Publication |
European cultural heritage newsletter on research |
Abbreviated Journal |
|
Volume |
8 |
Issue |
2 |
Pages |
2-7 |
Keywords |
A3 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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|
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|
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Open Access |
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Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:55573 |
Serial |
7844 |
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|
|
Author |
Torfs, K.; Van Grieken, R. |
Title |
Effects of marine spray and air pollution on monuments in the Mediterranean coastal environment |
Type |
H3 Book chapter |
Year |
1996 |
Publication |
|
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
170-174
T2 - Cultural research in Europe 1996 / Ha |
Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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|
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|
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|
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Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:14680 |
Serial |
7848 |
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|
Author |
De Vis, K.; Jembrih-Simbürger, D.; Schalm, O.; Schreiner, M.; Caen, J. |
Title |
Einfluss verschiedener Silbersalze auf die Farbintensität von Silbergelb : analytische Untersuchungen |
Type |
A2 Journal article |
Year |
2002 |
Publication |
Zeitschrift für Kunsttechnologie und Konservierung |
Abbreviated Journal |
|
Volume |
16 |
Issue |
1 |
Pages |
147-157 |
Keywords |
A2 Journal article; Art; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
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|
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|
Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0931-7198 |
ISBN |
|
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Open Access |
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Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:107748 |
Serial |
7855 |
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|
|
Author |
Lou, W.-K. |
Title |
The electrical properties of low low dimensional topological insulators |
Type |
Doctoral thesis |
Year |
2012 |
Publication |
|
Abbreviated Journal |
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Volume |
|
Issue |
|
Pages |
186 p. |
Keywords |
Doctoral thesis; Condensed Matter Theory (CMT) |
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Approved |
no |
Call Number |
UA @ admin @ c:irua:158894 |
Serial |
7858 |
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|
Author |
Xhoffer, C.; Jacob, W.; Van Grieken, R.; Broekaert, J.A.C.; Buseck, P. |
Title |
Electron energy-loss spectroscopy and its application to individual particle analysis |
Type |
P3 Proceeding |
Year |
1992 |
Publication |
|
Abbreviated Journal |
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Volume |
|
Issue |
|
Pages |
|
Keywords |
P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
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Edition |
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|
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Additional Links |
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Impact Factor |
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Times cited |
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Open Access |
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Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:2862 |
Serial |
7868 |
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|
|
Author |
Storms, H.; Van Dyck, P.; Van Grieken, R.; Maenhaut, W. |
Title |
Electron microprobe observations of recrystallization affecting PIXE-analysis of marine aerosol deposits |
Type |
A1 Journal article |
Year |
1985 |
Publication |
Journal of trace and microprobe techniques |
Abbreviated Journal |
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Volume |
2 |
Issue |
|
Pages |
103-117 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Address |
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Series Title |
|
Abbreviated Series Title |
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Series Volume |
|
Series Issue |
|
Edition |
|
ISSN |
0733-4680; 1532-2270 |
ISBN |
|
Additional Links |
UA library record |
Impact Factor |
|
Times cited |
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Open Access |
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Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:116718 |
Serial |
7871 |
Permanent link to this record |
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|
Author |
Leysen, L.A.; De Waele, J.K.; Roekens, E.J.; Van Grieken, R.E. |
Title |
Electron probe micro-analysis and laser microprobe mass analysis of material, leached from a limestone cathedral |
Type |
A1 Journal article |
Year |
1987 |
Publication |
Scanning microscopy |
Abbreviated Journal |
|
Volume |
1 |
Issue |
|
Pages |
1617-1630 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Publication Date |
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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 |
0891-7035 |
ISBN |
|
Additional Links |
UA library record |
Impact Factor |
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Times cited |
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Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:116794 |
Serial |
7872 |
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|
Author |
Hoornaert, S.; Treiger, B.; Van Grieken, R.; Valkovic, V. |
Title |
Electron probe X-ray microanalysis for the assessment of homogeneity of candidate reference materials at the nanogram level |
Type |
H3 Book chapter |
Year |
1996 |
Publication |
|
Abbreviated Journal |
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Volume |
|
Issue |
|
Pages |
29-49b
T2 - Reference materials for microanalytica |
Keywords |
H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
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Edition |
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|
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Additional Links |
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Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:14681 |
Serial |
7874 |
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|
Author |
Rahemi, V. |
Title |
Electrosensing applications by using titania as a support for bio(inspired) molecules |
Type |
Doctoral thesis |
Year |
2018 |
Publication |
|
Abbreviated Journal |
|
Volume |
|
Issue |
|
Pages |
133 p. |
Keywords |
Doctoral thesis; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
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Edition |
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|
Approved |
no |
Call Number |
UA @ admin @ c:irua:152884 |
Serial |
7877 |
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|
|
Author |
Smekens, A.; Knupfer, M.; Berghmans, P.; Van Grieken, R. |
Title |
The elemental composition and microstructure of soot emitted by different sources |
Type |
A1 Journal article |
Year |
2000 |
Publication |
Journal of aerosol science |
Abbreviated Journal |
|
Volume |
31 |
Issue |
S1 |
Pages |
917-918 |
Keywords |
A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
|
Address |
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Publication Date |
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|
Abbreviated Series Title |
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Series Issue |
|
Edition |
|
ISSN |
0021-8502; 1879-1964 |
ISBN |
|
Additional Links |
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Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:31647 |
Serial |
7887 |
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Author |
Silva, F.S.; Godoi, R.H.M.; Tauler, R.; de André, P.A.; Saldiva, P.H.N.; Van Grieken, R.; de Marchi, M.R.R. |
Title |
Elemental composition of PM2.5 in Araraquara City (Southeast Brazil) during seasons with and without sugar cane burning |
Type |
A2 Journal article |
Year |
2015 |
Publication |
Journal of environmental protection |
Abbreviated Journal |
|
Volume |
6 |
Issue |
5 |
Pages |
426-434 |
Keywords |
A2 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
Particulate matter with an aerodynamic diameter below 2.5 μm (PM2.5), present in polluted air, has been associated with a large spectrum of health impairments, mainly because of its deep deposition into the lungs. Araraquara City (Southeast Brazil) is surrounded by sugar-cane plantations, which are burned to facilitate the harvesting; this process causes environmental pollution due to the large amounts of soot that are released into the atmosphere. In this work, the elemental composition of PM2.5 was studied in two scenarios, namely in sugar-cane harvesting (HV) and in non-harvesting (NHV) seasons. The sampling strategy included one campaign in each season. PM2.5 was collected using a dichotomous sampler (10 L·min-1, 24 h) with PTFE filters. Information concerning the bulk elemental concentration was provided by energy-dispersive X-ray fluorescence. Enrichment factor analysis indicated that S, Cl, K, Cr, Ni, Cu, Zn, As, Cd and Pb were highly enriched relative to their crustal ratios (to Al). Principal component analysis was used to get some insight about the sources of the elements. Principal component 1 (PC1) explained 30.5% of data variance. The elements that had high loading (>0.7) were: S, Cr, As, and Pb; these are associated with combustion of fossil fuels. In principal component 2 (PC2), Cl, Cu, Zn, and Cd showed high loadings; these elements are associated with biomass burning. The Ni concentration found is three times larger than the threshold of risk for lung cancer, as recommended by the World Health Organization. |
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Publication Date |
2015-05-04 |
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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 |
2152-2197 |
ISBN |
|
Additional Links |
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Impact Factor |
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Times cited |
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Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:125885 |
Serial |
7891 |
Permanent link to this record |
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Author |
Van Grieken, R.; Van 't dack, L.; Costa Dantas, C.; Moura de Amorim, W.; Maenhaut, W. |
Title |
Elemental constituents of atmospheric aerosols in Recife, North-East Brazil |
Type |
A3 Journal article |
Year |
1982 |
Publication |
Environmental pollution: series B : chemical and physical |
Abbreviated Journal |
|
Volume |
4 |
Issue |
2 |
Pages |
143-163 |
Keywords |
A3 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation) |
Abstract |
Few data are available on the inorganic atmospheric pollution in the rapidly expanding cities of South America, like Recife, on the Atlantic Coast of North-east Brazil. Therefore, the elemental composition of atmospheric aerosols was investigated for nine sites in the Recife conurbation and a fairly remote site in the area. Total aerosol samples were collected on cellulose filters for analysis by energy dispersive X-ray fluorescence and cascade impactors were used to collect the aerosols as a function of particle size for subsequent analysis by proton-induced X-ray emission. Local soil aliquots were also analysed. About eighteen elements were quantified in all cases. The average total atmospheric concentrations appeared to be well above natural levels but usually lower than, or comparable with, those of North American and European cities. Dispersal of sea spray and of local soil (often contaminated with, for example, Cu, Zn and Pb from industrial sources) contributes predominantly to the total atmospheric load in Recife. However, the particle size fraction results also indicated strong excesses in the small particle mode for S, K, V, Mn, Ni, Cu, Zn, Br and Pb, mainly in the downtown area. Again, the corresponding enrichment factors were only moderate in comparison with other published urban data. |
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Publication Date |
2003-09-11 |
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|
Abbreviated Series Title |
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Series Volume |
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Series Issue |
|
Edition |
|
ISSN |
0143-148x; 1878-0695 |
ISBN |
|
Additional Links |
UA library record |
Impact Factor |
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Times cited |
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Notes |
|
Approved |
no |
Call Number |
UA @ admin @ c:irua:111437 |
Serial |
7894 |
Permanent link to this record |