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“Sample preparation for X-ray fluorescence”. Schmeling M, Van Grieken RE page 933 (2002).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Sample preparation for X-ray fluorescence analysis”. Injuk J, Van Grieken R page 13338 (2000).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Sample preparation for XRF”. Injuk J, Van Grieken RE page 657 (1992).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Selenium content and speciation in environmental waters determied by X-ray fluorescence spectroscopy”. Robberecht H, Van Grieken R page 362 (1980).
Keywords: H3 Book chapter; Pharmacology. Therapy; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Selenium content of soils and rye grass (Lolium multiflorum) in Belgium”. vanden Berghe D, Deelstra H, Robberecht H, Van Grieken R page 85 (1981).
Keywords: H3 Book chapter; Pharmacology. Therapy; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Selenium gehalten van levensmiddelen geconsumeerd in België”. Robberecht H, Deelstra H, vanden Berghe D, Van Grieken R, Revue des fermentations et des industries alimentaires 37, 188 (1983)
Keywords: A3 Journal article; Pharmacology. Therapy; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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Daems E (2021) Shaping up oligonucleotides : aptamer-target recognition investigated by native mass spectrometry. 235 p
Abstract: Aptamers are short, synthetic DNA or RNA molecules that are characterized by a specific 3D conformation which enables specific target recognition. Aptamers are promising tools in many application fields from sensing to therapeutics. One of the major challenges in the aptamer field is understanding the relationship between the sequence and what determines the higher-order structure and specific interactions with targets. Therefore, this PhD thesis focuses on the use of different mass spectrometry (MS) based approaches to characterize aptamers and their interactions. Several of these approaches are already widely applied to study other biomolecules, such as proteins, but are still largely unexplored for aptamers and oligonucleotides in general. A first focus was put on obtaining information on the higher-order structure and conformational stability of aptamers using a combination of MS and with ion mobility (IM) spectrometry by performing collision-induced unfolding (CIU) experiments. CIU was shown to hold great promise to analyze the conformational dynamics and gas-phase stabilities of aptamers. Next, the capabilities and limitations of native IM-MS for the analysis of noncovalent interactions of aptamers were demonstrated. The conformational behavior and interactions of cocaine-binding aptamers were studied and it was found that relative binding affinities of aptamers that only differ slightly in sequence and structure can be determined using native MS. Moreover, native IM-MS allowed the detection of small conformational changes upon binding of a target, which were found to be dependent on the binding mode of the aptamer. An adaptive binding mechanism was suggested for flexible aptamers that require more reorganization upon binding. In the final part of this thesis, the importance of thoroughly characterizing and validating aptamer-target interactions before using them in an application was emphasized. Moreover, the gathered insights were applied in our own development of a proof-of-concept aptamer-based sensor. This was shown by investigating the interactions of ampicillin aptamers which were found to not bind the target they were selected for in the first place. A multi-analytical approach combining complementary techniques was used for this purpose since no single technique is generally applicable to characterize all aptamers and their interactions and to obtain a comprehensive picture of the aptamer-target interactions. Furthermore, such multi-analytical approach was used to characterize a testosterone-binding aptamer while developing an aptamer-based electrochemiluminescent sensing strategy for this target. This shows the importance of native MS, in combination with other techniques, to thoroughly understand the aptamer-target interactions in the development of a designed application.
Keywords: Doctoral thesis; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Siberian Haze: complex study of aerosols in Siberia”. Koutsenogii PK, van Malderen H, Hoornaert S, Van Grieken R, Koutsenogii KP, Boufetov N, Makarov VI, Smoljakov BS, Nemirovski AM, Osipova LP, Krjukov JA, Ivakin EA, Posukh OL, Bronstein EL, Optics of the atmosphere and ocean 9, 712 (1996)
Keywords: A3 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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Piñ,era Herná,ndez I (2014) Simulation of atom displacements induced by photons and electrons in solids. 137 p
Keywords: Doctoral thesis; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Single particle analysis of aerosols from Siberia”. van Malderen H, Van Grieken R, Khodzher TV, Grachev M, Bufetov NS, Koutsenogii KP, Proceedings of the Russian-Ukrainian-Austrian-German Analytical Symposium (1994)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Single particle analysis of aerosols, observed in the marine boundary layer during the Monterey Area Ship Tracks Experiment (MAST), with respect to cloud droplet formation”. de Bock LA, Joos PE, Noone KJ, Pockalny RA, Van Grieken RE, Journal of atmospheric chemistry 37, 299 (2000). http://doi.org/10.1023/A:1006416600722
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1023/A:1006416600722
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“Single particle analysis of Hungarian background aerosol”. Török S, Sandor S, Xhoffer C, Van Grieken R, Meszaros E, Molnar A, Idojaras: quarterly journal of the Hungarian Meteorological Service 96, 223 (1992)
Keywords: A3 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Single particle analysis of suspended matter in the Makasar Strait and Flores Sea with particular reference to tin-bearing particles”. Dekov VM, van Put A, Eisma D, Van Grieken R, Journal of sea research 41, 35 (1999). http://doi.org/10.1016/S1385-1101(98)00035-5
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1016/S1385-1101(98)00035-5
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“Single particle analysis techniques”. de Bock LA, Van Grieken RE page 243 (1999).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Single particle and inorganic characterization of rainwater collected above the North Sea”. Jambers W, Dekov V, Van Grieken R, The science of the total environment 256, 133 (2000). http://doi.org/10.1016/S0048-9697(00)00477-0
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1016/S0048-9697(00)00477-0
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“Single particle characterisation of inorganic and organic North Sea suspension”. Jambers W, Dekov V, Van Grieken R, Marine chemistry 67, 17 (1999). http://doi.org/10.1016/S0304-4203(99)00046-8
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1016/S0304-4203(99)00046-8
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“Single particle characterisation of inorganic North Sea suspensions”. Jambers W, Van Grieken R, (1996)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Single particle characterisation of inorganic suspension in Lake Baikal”. Jambers W, Van Grieken R, Environmental science and technology 31, 1525 (1997)
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Single particle characterisation of the aerosol in the marine boundary layer and free troposphere over Tenerife, NE Atlantic, during ACE-2”. Hoornaert S, Godoi RHM, Van Grieken R, Journal of atmospheric chemistry 46, 271 (2003). http://doi.org/10.1023/A:1026383403878
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1023/A:1026383403878
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“Size-differentiated composition of aerosols in Khartoum, Sudan”. Eltayeb MAH, van Espen PJ, Cafmeyer J, Van Grieken RE, Maenhaut W, The science of the total environment 120, 281 (1992). http://doi.org/10.1016/0048-9697(92)90062-W
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Chemometrics (Mitac 3)
DOI: 10.1016/0048-9697(92)90062-W
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“Soil analysis by thin-film energy-dispersive X-ray fluorescence”. Van Grieken R, Van 't dack L, Costa Dantas C, Da Silveira Dantas H, Analytica chimica acta 108, 93 (1979). http://doi.org/10.1016/S0003-2670(01)93044-2
Abstract: Energy-dispersive x-ray fluorescence is advantageous for trace analysis of soils present as thin films. A target thickness of about 2 mg cm-2 provides a compromise between optimal sensitivity and minimal absorption effect or optimal accuracy. Sample preparation involves only suspending the finely ground soil in water and drying this suspension on a thin mylar foil glued on a ring that fits into the x.r.f. spectrometer. The effective sample weight present in the exciting beam area is computed from the scatter peaks, a method that cancels out target heterogeneity problems. High accuracy is demonstrated for many elements in reference soil and rock materials; a precision around 5% and a detection limit around 10 ppm can be achieved. As an illustration, results for 16 trace elements and preliminary interpretation are given for a series of pedologically important soil samples from Brasil.
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1016/S0003-2670(01)93044-2
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“Some critical observations about the degradation of glass : the formation of lamellae explained”. Schalm O, Nuyts G, Janssens K, Journal Of Non-Crystalline Solids 569, 120984 (2021). http://doi.org/10.1016/J.JNONCRYSOL.2021.120984
Abstract: This study demonstrates that the mechanism responsible for the transformation of glass into a degradation layer is pH-dependent. In acid conditions, the transformed glass is homogeneous and brittle. In mild alkaline conditions, transformed glass is heterogeneous due to the presence of lamellae composed of silica nanoparticles and the occurrence of Ca-rich inclusions. The fundamental difference between acid and alkaline conditions cannot be explained by the currently accepted degradation mechanism based on ion exchange. To explain this critical observation, we propose a refined degradation mechanism based on existing knowledge that involves several inwardly moving reaction fronts. The fronts responsible for the transformation of the silicate network into amorphous silica are also responsible for the morphology of the transformed glass. We have identified the feedback mechanism that explains the formation of lamellae in alkaline conditions.
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
Impact Factor: 2.124
DOI: 10.1016/J.JNONCRYSOL.2021.120984
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“Some new applications of auxiliary signals in X-ray fluorescence and electron microprobe analysis”. Kuczumow A, Vekemans B, Schalm O, Vincze L, Dorriné, W, Gysels K, Van Grieken R, , 197 (1999)
Keywords: P1 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Some studies of the effect of indoor and outdoor pollutants on cultural heritage items”. Van Grieken R, Kontozova V, Godoi RHM, Spolnik Z, Worobiec A, Deutsch F, Bencs L, (2005)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation); Laboratory Experimental Medicine and Pediatrics (LEMP)
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“Source apportionment of individual aerosol particles at Hungarian background stations”. Török S, Szandor S, Xhoffer C, Van Grieken R page 32 (1993).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Sources and elemental composition of ambient PM2.5 in three European cities”. Vallius M, Janssen NAH, Heinrich J, Hoek G, Ruuskanen J, Cyrys J, Van Grieken R, de Hartog JJ, Kreyling WG, Pekkanen J, The science of the total environment 337, 147 (2005). http://doi.org/10.1016/J.SCITOTENV.2004.06.018
Keywords: A1 Journal article; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
DOI: 10.1016/J.SCITOTENV.2004.06.018
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“Spark source mass spectrometry for trace analysis of diverse biological matrices”. Vos L, Van Grieken R page 303 (1983).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Spatial and temporal variation of anthropogenic palladium in the environment”. Bencs L, Ravindra K, Van Grieken R page 433 (2006).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Spatial and temporal variations in particulate Polycyclic Aromatic Hydrocarbon (PAH) levels over Menen (Belgium) and their relation with air mass trajectories”. Ravindra K, Wauters E, Van Grieken R page 838 (2007).
Keywords: H3 Book chapter; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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“Speciation and distribution of sulfur and nitrogen in individual aerosol particles measured by LAMMA”. Bruynseels F, Van Grieken R, (1984)
Keywords: P3 Proceeding; AXES (Antwerp X-ray Analysis, Electrochemistry and Speciation)
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