1
|
Monaco C, Kronenberger R, Talevi G, Pannone L, Cappello IA, Candelari M, Ramak R, Della Rocca DG, Bori E, Terryn H, Baert K, Laha P, Krasniqi A, Gharaviri A, Bala G, Chierchia GB, La Meir M, Innocenti B, de Asmundis C. Advancing Surgical Arrhythmia Ablation: Novel Insights on 3D Printing Applications and Two Biocompatible Materials. Biomedicines 2024; 12:869. [PMID: 38672223 PMCID: PMC11048352 DOI: 10.3390/biomedicines12040869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/10/2024] [Accepted: 04/12/2024] [Indexed: 04/28/2024] Open
Abstract
To date, studies assessing the safety profile of 3D printing materials for application in cardiac ablation are sparse. Our aim is to evaluate the safety and feasibility of two biocompatible 3D printing materials, investigating their potential use for intra-procedural guides to navigate surgical cardiac arrhythmia ablation. Herein, we 3D printed various prototypes in varying thicknesses (0.8 mm-3 mm) using a resin (MED625FLX) and a thermoplastic polyurethane elastomer (TPU95A). Geometrical testing was performed to assess the material properties pre- and post-sterilization. Furthermore, we investigated the thermal propagation behavior beneath the 3D printing materials during cryo-energy and radiofrequency ablation using an in vitro wet-lab setup. Moreover, electron microscopy and Raman spectroscopy were performed on biological tissue that had been exposed to the 3D printing materials to assess microparticle release. Post-sterilization assessments revealed that MED625FLX at thicknesses of 1 mm, 2.5 mm, and 3 mm, along with TPU95A at 1 mm and 2.5 mm, maintained geometrical integrity. Thermal analysis revealed that material type, energy source, and their factorial combination with distance from the energy source significantly influenced the temperatures beneath the 3D-printed material. Electron microscopy revealed traces of nitrogen and sulfur underneath the MED625FLX prints (1 mm, 2.5 mm) after cryo-ablation exposure. The other samples were uncontaminated. While Raman spectroscopy did not detect material release, further research is warranted to better understand these findings for application in clinical settings.
Collapse
Affiliation(s)
- Cinzia Monaco
- Heart Rhythm Management Centre, Postgraduate Program in Cardiac Electrophysiology and Pacing, European Reference Networks Guard-Heart, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium; (C.M.)
| | - Rani Kronenberger
- Cardiac Surgery Department, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium; (R.K.)
| | - Giacomo Talevi
- Heart Rhythm Management Centre, Postgraduate Program in Cardiac Electrophysiology and Pacing, European Reference Networks Guard-Heart, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium; (C.M.)
| | - Luigi Pannone
- Heart Rhythm Management Centre, Postgraduate Program in Cardiac Electrophysiology and Pacing, European Reference Networks Guard-Heart, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium; (C.M.)
| | - Ida Anna Cappello
- Heart Rhythm Management Centre, Postgraduate Program in Cardiac Electrophysiology and Pacing, European Reference Networks Guard-Heart, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium; (C.M.)
| | - Mara Candelari
- Heart Rhythm Management Centre, Postgraduate Program in Cardiac Electrophysiology and Pacing, European Reference Networks Guard-Heart, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium; (C.M.)
| | - Robbert Ramak
- Heart Rhythm Management Centre, Postgraduate Program in Cardiac Electrophysiology and Pacing, European Reference Networks Guard-Heart, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium; (C.M.)
| | - Domenico Giovanni Della Rocca
- Heart Rhythm Management Centre, Postgraduate Program in Cardiac Electrophysiology and Pacing, European Reference Networks Guard-Heart, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium; (C.M.)
| | - Edoardo Bori
- BEAMS Department, Bio Electro and Mechanical Systems, École Polytechnique de Bruxelles, Université Libre de Bruxelles, 1050 Brussels, Belgium (B.I.)
| | - Herman Terryn
- Research Group Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium
| | - Kitty Baert
- Research Group Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium
| | - Priya Laha
- Research Group Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium
| | - Ahmet Krasniqi
- In Vivo Cellular and Molecular Imaging Laboratory, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium
| | - Ali Gharaviri
- Heart Rhythm Management Centre, Postgraduate Program in Cardiac Electrophysiology and Pacing, European Reference Networks Guard-Heart, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium; (C.M.)
| | - Gezim Bala
- Heart Rhythm Management Centre, Postgraduate Program in Cardiac Electrophysiology and Pacing, European Reference Networks Guard-Heart, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium; (C.M.)
| | - Gian Battista Chierchia
- Heart Rhythm Management Centre, Postgraduate Program in Cardiac Electrophysiology and Pacing, European Reference Networks Guard-Heart, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium; (C.M.)
| | - Mark La Meir
- Cardiac Surgery Department, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium; (R.K.)
| | - Bernardo Innocenti
- BEAMS Department, Bio Electro and Mechanical Systems, École Polytechnique de Bruxelles, Université Libre de Bruxelles, 1050 Brussels, Belgium (B.I.)
| | - Carlo de Asmundis
- Heart Rhythm Management Centre, Postgraduate Program in Cardiac Electrophysiology and Pacing, European Reference Networks Guard-Heart, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, 1050 Brussels, Belgium; (C.M.)
| |
Collapse
|
2
|
Tian Y, Florenciano I, Xia H, Li Q, Baysal HE, Zhu D, Ramunni E, Meyers S, Yu TY, Baert K, Hauffman T, Nider S, Göksel B, Molina-Lopez F. Facile Fabrication of Flexible and High-Performing Thermoelectrics by Direct Laser Printing on Plastic Foil. Adv Mater 2024; 36:e2307945. [PMID: 38100238 DOI: 10.1002/adma.202307945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 11/30/2023] [Indexed: 12/23/2023]
Abstract
The emerging fields of wearables and the Internet of Things introduce the need for electronics and power sources with unconventional form factors: large area, customizable shape, and flexibility. Thermoelectric (TE) generators can power those systems by converting abundant waste heat into electricity, whereas the versatility of additive manufacturing suits heterogeneous form factors. Here, additive manufacturing of high-performing flexible TEs is proposed. Maskless and large-area patterning of Bi2Te3-based films is performed by laser powder bed fusion directly on plastic foil. Mechanical interlocking allows simultaneous patterning, sintering, and attachment of the films to the substrate without using organic binders that jeopardize the final performance. Material waste could be minimized by recycling the unexposed powder. The particular microstructure of the laser-printed material renders the-otherwise brittle-Bi2Te3 films highly flexible despite their high thickness. The films survive 500 extreme-bending cycles to a 0.76 mm radius. Power factors above 1500 µW m-1K-2 and a record-low sheet resistance for flexible TEs of 0.4 Ω sq-1 are achieved, leading to unprecedented potential for power generation. This versatile fabrication route enables innovative implementations, such as cuttable arrays adapting to specific applications in self-powered sensing, and energy harvesting from unusual scenarios like human skin and curved hot surfaces.
Collapse
Affiliation(s)
- Yuan Tian
- KU Leuven, Department of Materials Engineering, Kasteelpark Arenberg 44 - bus 2450, Leuven, 3001, Belgium
| | - Isidro Florenciano
- KU Leuven, Department of Materials Engineering, Kasteelpark Arenberg 44 - bus 2450, Leuven, 3001, Belgium
| | - Heyi Xia
- KU Leuven, Department of Materials Engineering, Kasteelpark Arenberg 44 - bus 2450, Leuven, 3001, Belgium
| | - Qiyuan Li
- KU Leuven, Department of Materials Engineering, Kasteelpark Arenberg 44 - bus 2450, Leuven, 3001, Belgium
| | - Hasan Emre Baysal
- KU Leuven, Department of Materials Engineering, Kasteelpark Arenberg 44 - bus 2450, Leuven, 3001, Belgium
| | - Daiman Zhu
- KU Leuven, Department of Materials Engineering, Kasteelpark Arenberg 44 - bus 2450, Leuven, 3001, Belgium
| | - Eduardo Ramunni
- KU Leuven, Department of Materials Engineering, Kasteelpark Arenberg 44 - bus 2450, Leuven, 3001, Belgium
| | - Sebastian Meyers
- KU Leuven, Department of Mechanical Engineering, Celestijnenlaan 300 - bus 2420, Leuven, 3001, Belgium
| | - Tzu-Yi Yu
- KU Leuven, Department of Materials Engineering, Kasteelpark Arenberg 44 - bus 2450, Leuven, 3001, Belgium
| | - Kitty Baert
- Vrije Universiteit Brussel, Department of Materials and Chemistry, Research Group Sustainable Materials Engineering (SUME), Lab Electrochemical and Surface Engineering (SURF), Pleinlaan 2, Brussels, 1050, Belgium
| | - Tom Hauffman
- Vrije Universiteit Brussel, Department of Materials and Chemistry, Research Group Sustainable Materials Engineering (SUME), Lab Electrochemical and Surface Engineering (SURF), Pleinlaan 2, Brussels, 1050, Belgium
| | - Souhaila Nider
- KU Leuven, Department of Chemical Engineering, Celestijnenlaan 200J - bus 2424, Leuven, 3001, Belgium
| | - Berfu Göksel
- KU Leuven, Department of Materials Engineering, Kasteelpark Arenberg 44 - bus 2450, Leuven, 3001, Belgium
| | - Francisco Molina-Lopez
- KU Leuven, Department of Materials Engineering, Kasteelpark Arenberg 44 - bus 2450, Leuven, 3001, Belgium
| |
Collapse
|
3
|
Gys N, Pawlak B, Marcoen K, Reekmans G, Velasco LF, An R, Wyns K, Baert K, Zhang K, Lufungula LL, Piras A, Siemons L, Michielsen B, Van Doorslaer S, Blockhuys F, Hauffman T, Adriaensens P, Mullens S, Meynen V. Self-Induced and Progressive Photo-Oxidation of Organophosphonic Acid Grafted Titanium Dioxide. Chempluschem 2023; 88:e202200441. [PMID: 36802130 DOI: 10.1002/cplu.202200441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 02/13/2023] [Accepted: 02/14/2023] [Indexed: 02/21/2023]
Abstract
While synthesis-properties-performance correlations are being studied for organophosphonic acid grafted TiO2 , their stability and the impact of the exposure conditions on possible changes in the interfacial surface chemistry remain unexplored. Here, the impact of different ageing conditions on the evolution of the surface properties of propyl- and 3-aminopropylphosphonic acid grafted mesoporous TiO2 over a period of 2 years is reported, using solid-state 31 P and 13 C NMR, ToF-SIMS and EPR as main techniques. In humid conditions under ambient light exposure, PA grafted TiO2 surfaces initiate and facilitate photo-induced oxidative reactions, resulting in the formation of phosphate species and degradation of the grafted organic group with a loss of carbon content ranging from 40 to 60 wt %. By revealing its mechanism, solutions were provided to prevent degradation. This work provides valuable insights for the broad community in choosing optimal exposure/storage conditions that extend the lifetime and improve the materials' performance, positively impacting sustainability.
Collapse
Affiliation(s)
- Nick Gys
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV), Boeretang 200, 2400, Mol, Belgium.,Laboratory of Adsorption and Catalysis (LADCA), Department of Chemistry, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium.,Present address: Centre for Membrane Separations, Adsorption, Catalysis and Spectroscopy (cMACS), KU Leuven, Celestijnenlaan 200F, 3001, Leuven, Belgium.,Research Group Electrochemical and Surface Engineering (SURF), Vrije Universiteit Brussel, Pleinlaan, Leuven, 2, 1050, Brussels, Belgium
| | - Bram Pawlak
- Analytical and Circular Chemistry (ACC), Institute for Materials Research (IMO), Hasselt University, Agoralaan 1, 3590, Diepenbeek, Belgium
| | - Kristof Marcoen
- Research Group Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
| | - Gunter Reekmans
- Analytical and Circular Chemistry (ACC), Institute for Materials Research (IMO), Hasselt University, Agoralaan 1, 3590, Diepenbeek, Belgium
| | - Leticia F Velasco
- Department of Chemistry, Royal Military Academy, Renaissancelaan 30, 1000, Brussels, Belgium
| | - Rui An
- Laboratory of Adsorption and Catalysis (LADCA), Department of Chemistry, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium
| | - Kenny Wyns
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV), Boeretang 200, 2400, Mol, Belgium
| | - Kitty Baert
- Research Group Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
| | - Kaimin Zhang
- Laboratory of Adsorption and Catalysis (LADCA), Department of Chemistry, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium
| | - Léon Luntadila Lufungula
- Structural Chemistry Group, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Alessandra Piras
- Laboratory of Applied Materials Chemistry, Unit of Nanomaterials Chemistry, Department of Chemistry, Namur University, Rue de Bruxelles 61, 5000, Namur, Belgium.,Design and Synthesis of Inorganic Nanomaterials (DESINe), Institute for Materials Research (IMO-IMOMEC), Hasselt University, Agoralaan 1, 3590, Diepenbeek, Belgium
| | - Laurens Siemons
- Structural Chemistry Group, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium.,Present address: Institute for Applied Chromatography (IAC), SGS Belgium NV, Polderdijkweg 16, 2030, Antwerp, Belgium
| | - Bart Michielsen
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV), Boeretang 200, 2400, Mol, Belgium
| | - Sabine Van Doorslaer
- Laboratory of Biophysics and BioMedical Physics (BIMEF), Department of Chemistry, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium
| | - Frank Blockhuys
- Structural Chemistry Group, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium
| | - Tom Hauffman
- Research Group Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050, Brussels, Belgium
| | - Peter Adriaensens
- Analytical and Circular Chemistry (ACC), Institute for Materials Research (IMO), Hasselt University, Agoralaan 1, 3590, Diepenbeek, Belgium
| | - Steven Mullens
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV), Boeretang 200, 2400, Mol, Belgium
| | - Vera Meynen
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV), Boeretang 200, 2400, Mol, Belgium.,Laboratory of Adsorption and Catalysis (LADCA), Department of Chemistry, University of Antwerp, Universiteitsplein 1, 2610, Wilrijk, Belgium
| |
Collapse
|
4
|
Moussadik A, Lazar NE, Mazkad D, Siro Brigiano F, Baert K, Hauffman T, Benzaouak A, Abrouki Y, Kacimi M, Tielens F, Halim M, El Hamidi A. Investigation of electronic and photocatalytic properties of AgTi2(PO4)3 NASICON-type phosphate: Combining experimental data and DFT calculations. J Photochem Photobiol A Chem 2023. [DOI: 10.1016/j.jphotochem.2022.114289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
|
5
|
Marcoen K, Gauvin M, De Cleene A, Obitsø Nielsen J, Baert K, Terryn H, De Strycker J, Hauffman T, Pantleon K. Identification of carbon‐containing phases in electrodeposited hard Fe‐C coatings with intentionally co‐deposited carbon. SURF INTERFACE ANAL 2023. [DOI: 10.1002/sia.7196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- Kristof Marcoen
- Vrije Universiteit Brussel, Research Group of Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry (MACH) Pleinlaan 2 1050 Brussels Belgium
- OCAS NV, President John F. Kennedylaan 3 9060 Zelzate Belgium
| | - Mélanie Gauvin
- OCAS NV, President John F. Kennedylaan 3 9060 Zelzate Belgium
| | | | - Jacob Obitsø Nielsen
- Technical University of Denmark, Department of Civil and Mechanical Engineering Produktionstorvet 2800 Kongens Lyngby Denmark
- Fiberline Composites Denmark
| | - Kitty Baert
- Vrije Universiteit Brussel, Research Group of Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry (MACH) Pleinlaan 2 1050 Brussels Belgium
| | - Herman Terryn
- Vrije Universiteit Brussel, Research Group of Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry (MACH) Pleinlaan 2 1050 Brussels Belgium
- Delft University of Technology, Department of Materials Science and Engineering Mekelweg 2 2628 CD Delft The Netherlands
| | | | - Tom Hauffman
- Vrije Universiteit Brussel, Research Group of Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry (MACH) Pleinlaan 2 1050 Brussels Belgium
| | - Karen Pantleon
- Technical University of Denmark, Department of Civil and Mechanical Engineering Produktionstorvet 2800 Kongens Lyngby Denmark
| |
Collapse
|
6
|
Gys N, An R, Pawlak B, Vogelsang D, Wyns K, Baert K, Vansant A, Blockhuys F, Adriaensens P, Hauffman T, Michielsen B, Mullens S, Meynen V. Amino-Alkylphosphonate-Grafted TiO 2: How the Alkyl Chain Length Impacts the Surface Properties and the Adsorption Efficiency for Pd. ACS Omega 2022; 7:45409-45421. [PMID: 36530305 PMCID: PMC9753204 DOI: 10.1021/acsomega.2c06020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/17/2022] [Accepted: 11/17/2022] [Indexed: 06/17/2023]
Abstract
Amino-alkylphosphonic acid-grafted TiO2 materials are of increasing interest in a variety of applications such as metal sorption, heterogeneous catalysis, CO2 capture, and enzyme immobilization. To date, systematic insights into the synthesis-properties-performance correlation are missing for such materials, albeit giving important know-how towards their applicability and limitations. In this work, the impact of the chain length and modification conditions (concentration and temperature) of amino-alkylphosphonic acid-grafted TiO2 on the surface properties and adsorption performance of palladium is studied. Via grafting with aminomethyl-, 3-aminopropyl-, and 6-aminohexylphosphonic acid, combined with the spectroscopic techniques (DRIFT, 31P NMR, XPS) and zeta potential measurements, differences in surface properties between the C1, C3, and C6 chains are revealed. The modification degree decreases with increasing chain length under the same synthesis conditions, indicative of folded grafted groups that sterically shield an increasing area of binding sites with increasing chain length. Next, all techniques confirm the different surface interactions of a C1 chain compared to a C3 or C6 chain. This is in line with palladium adsorption experiments, where only for a C1 chain, the adsorption efficiency is affected by the precursor concentration used for modification. The absence of a straightforward correlation between the number of free NH2 groups and the adsorption capacity for the different chain lengths indicates that other chain-length-specific surface interactions are controlling the adsorption performance. The increasing pH stability in the order of C1 < C3 < C6 can possibly be associated to a higher fraction of inaccessible hydrophilic sites due to the presence of folded structures. Lastly, the comparison of adsorption performance and pH stability with 3-aminopropyl(triethoxysilane)-grafted TiO2 reveals the applicability of both grafting methods depending on the envisaged pH during sorption.
Collapse
Affiliation(s)
- Nick Gys
- Sustainable
Materials, Flemish Institute for Technological
Research (VITO NV), Boeretang
200, 2400Mol, Belgium
- Laboratory
of Adsorption and Catalysis (LADCA), Department of Chemistry, University of Antwerp, Universiteitsplein 1, 2610Wilrijk, Belgium
| | - Rui An
- Laboratory
of Adsorption and Catalysis (LADCA), Department of Chemistry, University of Antwerp, Universiteitsplein 1, 2610Wilrijk, Belgium
| | - Bram Pawlak
- Analytical
and Circular Chemistry (ACC), Institute for Materials Research (IMO), Hasselt University, Agoralaan 1, 3590Diepenbeek, Belgium
| | - David Vogelsang
- Sustainable
Materials, Flemish Institute for Technological
Research (VITO NV), Boeretang
200, 2400Mol, Belgium
| | - Kenny Wyns
- Sustainable
Materials, Flemish Institute for Technological
Research (VITO NV), Boeretang
200, 2400Mol, Belgium
| | - Kitty Baert
- Research
Group Electrochemical and Surface Engineering (SURF), Department Materials
and Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050Brussels, Belgium
| | - Alexander Vansant
- Sustainable
Materials, Flemish Institute for Technological
Research (VITO NV), Boeretang
200, 2400Mol, Belgium
| | - Frank Blockhuys
- Structural
Chemistry Group, Department of Chemistry, University of Antwerp, Groenenborgerlaan 171, 2020Antwerp, Belgium
| | - Peter Adriaensens
- Analytical
and Circular Chemistry (ACC), Institute for Materials Research (IMO), Hasselt University, Agoralaan 1, 3590Diepenbeek, Belgium
| | - Tom Hauffman
- Research
Group Electrochemical and Surface Engineering (SURF), Department Materials
and Chemistry, Vrije Universiteit Brussel, Pleinlaan 2, 1050Brussels, Belgium
| | - Bart Michielsen
- Sustainable
Materials, Flemish Institute for Technological
Research (VITO NV), Boeretang
200, 2400Mol, Belgium
| | - Steven Mullens
- Sustainable
Materials, Flemish Institute for Technological
Research (VITO NV), Boeretang
200, 2400Mol, Belgium
| | - Vera Meynen
- Sustainable
Materials, Flemish Institute for Technological
Research (VITO NV), Boeretang
200, 2400Mol, Belgium
- Laboratory
of Adsorption and Catalysis (LADCA), Department of Chemistry, University of Antwerp, Universiteitsplein 1, 2610Wilrijk, Belgium
| |
Collapse
|
7
|
Gys N, Pawlak B, Lufungula LL, Marcoen K, Wyns K, Baert K, Atia TA, Spooren J, Adriaensens P, Blockhuys F, Hauffman T, Meynen V, Mullens S, Michielsen B. Selective Pd recovery from acidic leachates by 3-mercaptopropylphosphonic acid grafted TiO 2: does surface coverage correlate to performance? RSC Adv 2022; 12:36046-36062. [PMID: 36545072 PMCID: PMC9756939 DOI: 10.1039/d2ra07214a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 12/12/2022] [Indexed: 12/23/2022] Open
Abstract
Modification of metal oxides with organophosphonic acids (PAs) provides the ability to control and tailor the surface properties. The metal oxide phosphonic acid bond (M-O-P) is known to be stable under harsh conditions, making PAs a promising candidate for the recovery of metals from complex acidic leachates. The thiol functional group is an excellent regenerable scavenging group for these applications. However, the research on organophosphonic acid grafting with thiol groups is very limited. In this study, four different metal sorbent materials were designed with different thiol surface coverages. An aqueous-based grafting of 3-mercaptopropylphosphonic acid (3MPPA) on mesoporous TiO2 was employed. Surface grafted thiol groups could be obtained in the range from 0.9 to 1.9 groups per nm2. The different obtained surface properties were studied and correlated to the Pd adsorption performance. High Pd/S adsorption efficiencies were achieved, indicating the presence of readily available sorption sites. A large difference in their selectivity towards Pd removal from a spend automotive catalyst leachate was observed due to the co-adsorption of Fe on the titania support. The highest surface coverage showed the highest selectivity (K d: 530 mL g-1) and adsorption capacity (Q max: 0.32 mmol g-1) towards Pd, while strongly reducing the co-adsorption of Fe on remaining TiO2 sites.
Collapse
Affiliation(s)
- Nick Gys
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium,Laboratory of Adsorption and Catalysis (LADCA), Department of Chemistry, University of Antwerp, Universiteitsplein 1Wilrijk 2610Belgium
| | - Bram Pawlak
- Analytical and Circular Chemistry (ACC), Institute for Materials Research (IMO), Hasselt UniversityAgoralaan 1Diepenbeek 3590Belgium
| | - Léon Luntadila Lufungula
- Structural Chemistry Group, Department of Chemistry, University of AntwerpGroenenborgerlaan 171Antwerp 2020Belgium
| | - Kristof Marcoen
- Research Group Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry, Vrije Universiteit BrusselPleinlaan 2Brussels 1050Belgium
| | - Kenny Wyns
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium
| | - Kitty Baert
- Research Group Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry, Vrije Universiteit BrusselPleinlaan 2Brussels 1050Belgium
| | - Thomas Abo Atia
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium,Department of Chemistry, KU LeuvenCelestijnenlaan 200FLeuven 3000Belgium
| | - Jeroen Spooren
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium
| | - Peter Adriaensens
- Analytical and Circular Chemistry (ACC), Institute for Materials Research (IMO), Hasselt UniversityAgoralaan 1Diepenbeek 3590Belgium
| | - Frank Blockhuys
- Structural Chemistry Group, Department of Chemistry, University of AntwerpGroenenborgerlaan 171Antwerp 2020Belgium
| | - Tom Hauffman
- Research Group Electrochemical and Surface Engineering (SURF), Department Materials and Chemistry, Vrije Universiteit BrusselPleinlaan 2Brussels 1050Belgium
| | - Vera Meynen
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium,Laboratory of Adsorption and Catalysis (LADCA), Department of Chemistry, University of Antwerp, Universiteitsplein 1Wilrijk 2610Belgium
| | - Steven Mullens
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium
| | - Bart Michielsen
- Sustainable Materials, Flemish Institute for Technological Research (VITO NV)Boeretang 200Mol 2400Belgium
| |
Collapse
|
8
|
Demaude A, Baert K, Petitjean D, Zveny J, Goormaghtigh E, Hauffman T, Gordon MJ, Reniers F. Simple and Scalable Chemical Surface Patterning via Direct Deposition from Immobilized Plasma Filaments in a Dielectric Barrier Discharge. Adv Sci (Weinh) 2022; 9:e2200237. [PMID: 35343108 PMCID: PMC9130873 DOI: 10.1002/advs.202200237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2022] [Revised: 03/10/2022] [Indexed: 06/14/2023]
Abstract
In this work, immobilization of the often unwanted filaments in dielectric barrier discharges (DBD) is achieved and used for one-step deposition of patterned coatings. By texturing one of the dielectric surfaces, a discharge containing stationary plasma filaments is ignited in a mix of argon and propargyl methacrylate (PMA) in a reactor operating at atmospheric pressure. From PMA, hydrophobic and hydrophilic chemical and topographical contrasts at sub-millimeter scale are obtained on silicon and glass substrates. Chemical and physical characterizations of the samples are performed by micrometer-scale X-ray photoelectron spectroscopy and infrared imaging and by water contact angle and profilometry, respectively. From the latter and additional information from high-speed imaging of the plasma phase and electrical measurements, it is suggested that filaments, denser in energetic species, lead to higher deposition rate with higher fragmentation of the precursor, while surface discharges igniting outwards the filaments are leading to smoother and slower deposition. This work opens a new route for a one-step large-area chemical and morphological patterning of surfaces at sub-millimeter scales. Moreover, the possibility to separately deposit coatings from filaments and the surrounding plasma phase can be helpful to better understand the processes occurring during plasma polymerization in filamentary DBD.
Collapse
Affiliation(s)
- Annaëlle Demaude
- Faculty of SciencesChemistry of SurfacesInterfaces and Nanomaterials (ChemSIN)Université libre de BruxellesAvenue F.D. Roosevelt 50, CP 255BrusselsB‐1050Belgium
| | - Kitty Baert
- Faculty of EngineeringDepartment of Materials and ChemistryElectrochemical and Surface Engineering Research Group (SURF)Vrije Universiteit BrusselPleinlaan 2BrusselsB‐1050Belgium
| | - David Petitjean
- Faculty of SciencesChemistry of SurfacesInterfaces and Nanomaterials (ChemSIN)Université libre de BruxellesAvenue F.D. Roosevelt 50, CP 255BrusselsB‐1050Belgium
| | - Juliette Zveny
- Faculty of SciencesChemistry of SurfacesInterfaces and Nanomaterials (ChemSIN)Université libre de BruxellesAvenue F.D. Roosevelt 50, CP 255BrusselsB‐1050Belgium
| | - Erik Goormaghtigh
- Structure and Function of Biological MembranesCenter for Structural Biology and BioinformaticsUniversité libre de BruxellesAvenue F.D. Roosevelt 50, CP 206/2BrusselsB‐1050Belgium
| | - Tom Hauffman
- Faculty of EngineeringDepartment of Materials and ChemistryElectrochemical and Surface Engineering Research Group (SURF)Vrije Universiteit BrusselPleinlaan 2BrusselsB‐1050Belgium
| | - Michael J. Gordon
- Department of Chemical EngineeringEng II #3351University of California – Santa BarbaraSanta BarbaraCA93106‐5080USA
| | - François Reniers
- Faculty of SciencesChemistry of SurfacesInterfaces and Nanomaterials (ChemSIN)Université libre de BruxellesAvenue F.D. Roosevelt 50, CP 255BrusselsB‐1050Belgium
| |
Collapse
|
9
|
Dimitrova N, Banti A, Spyridou ON, Papaderakis A, Georgieva J, Sotiropoulos S, Valova E, Armyanov S, Tatchev D, Hubin A, Baert K. Photodeposited IrO2 on TiO2 support as a catalyst for oxygen evolution reaction. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
10
|
Choukroun D, Pacquets L, Li C, Hoekx S, Arnouts S, Baert K, Hauffman T, Bals S, Breugelmans T. Mapping Composition-Selectivity Relationships of Supported Sub-10 nm Cu-Ag Nanocrystals for High-Rate CO 2 Electroreduction. ACS Nano 2021; 15:14858-14872. [PMID: 34428372 DOI: 10.1021/acsnano.1c04943] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Colloidal Cu-Ag nanocrystals measuring less than 10 nm across are promising candidates for integration in hybrid CO2 reduction reaction (CO2RR) interfaces, especially in the context of tandem catalysis and selective multicarbon (C2-C3) product formation. In this work, we vary the synthetic-ligand/copper molar ratio from 0.1 to 1.0 and the silver/copper atomic ratio from 0 to 0.7 and study the variations in the nanocrystals' size distribution, morphology and reactivity at rates of ≥100 mA cm-2 in a gas-fed recycle electrolyzer operating under neutral to mildly basic conditions (0.1-1.0 M KHCO3). High-resolution electron microscopy and spectroscopy are used in order to characterize the morphology of sub-10 nm Cu-Ag nanodimers and core-shells and to elucidate trends in Ag coverage and surface composition. It is shown that Cu-Ag nanocrystals can be densely dispersed onto a carbon black support without the need for immediate ligand removal or binder addition, which considerably facilitates their application. Although CO2RR product distribution remains an intricate function of time, (kinetic) overpotential and processing conditions, we nevertheless conclude that the ratio of oxygenates to hydrocarbons (which depends primarily on the initial dispersion of the nanocrystals and their composition) rises 3-fold at moderate Ag atom % relative to Cu NCs-based electrodes. Finally, the merits of this particular Cu-Ag/C system and the recycling reactor employed are utilized to obtain maximum C2-C3 partial current densities of 92-140 mA cm-2 at -1.15 VRHE and liquid product concentrations in excess of 0.05 wt % in 1 M KHCO3 after short electrolysis periods.
Collapse
Affiliation(s)
- Daniel Choukroun
- Applied Electrochemistry and Catalysis (ELCAT), University of Antwerp, 2610 Wilrijk, Belgium
| | - Lien Pacquets
- Applied Electrochemistry and Catalysis (ELCAT), University of Antwerp, 2610 Wilrijk, Belgium
- Electron Microscopy for Materials Research (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Chen Li
- Electron Microscopy for Materials Research (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Saskia Hoekx
- Applied Electrochemistry and Catalysis (ELCAT), University of Antwerp, 2610 Wilrijk, Belgium
- Electron Microscopy for Materials Research (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Sven Arnouts
- Applied Electrochemistry and Catalysis (ELCAT), University of Antwerp, 2610 Wilrijk, Belgium
- Electron Microscopy for Materials Research (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Kitty Baert
- Electrochemical and Surface Engineering (SURF), Materials and Chemistry (MACH), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Tom Hauffman
- Electrochemical and Surface Engineering (SURF), Materials and Chemistry (MACH), Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
| | - Sara Bals
- Electron Microscopy for Materials Research (EMAT), University of Antwerp, 2020 Antwerp, Belgium
| | - Tom Breugelmans
- Applied Electrochemistry and Catalysis (ELCAT), University of Antwerp, 2610 Wilrijk, Belgium
- Separation & Conversion Technologies, Flemish Institute for Technological Research (VITO), 2400 Mol, Belgium
| |
Collapse
|
11
|
Chen Q, Ozkan A, Chattopadhyay B, Baert K, Poleunis C, Tromont A, Snyders R, Delcorte A, Terryn H, Delplancke-Ogletree MP, Geerts YH, Reniers F. N-Doped TiO 2 Photocatalyst Coatings Synthesized by a Cold Atmospheric Plasma. Langmuir 2019; 35:7161-7168. [PMID: 31074993 DOI: 10.1021/acs.langmuir.9b00784] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
This work presents a simple, fast (20 min treatment), inexpensive, and highly efficient method for synthesizing nitrogen-doped titanium dioxide (N-TiO2) as an enhanced visible light photocatalyst. In this study, N-TiO2 coatings were fabricated by atmospheric pressure dielectric barrier discharge (DBD) at room temperature. The composition and the chemical bonds of the TiO2 and N-TiO2 coatings were characterized by X-ray photoelectron spectroscopy (XPS) and time-of-flight secondary ion mass spectroscopy (ToF-SIMS). The results indicate that the nitrogen element has doped the TiO2 lattice, which was further confirmed by Raman spectroscopy and grazing incidence X-ray diffraction (GIXRD). The doping mechanism was investigated using OES to study the plasma properties under different conditions. It suggests that the NH radicals play a key role in doping TiO2. The concentration of nitrogen in the N-TiO2 coatings can be controlled by changing the concentration of NH3 in the plasma or the applied power to adjust the concentration of NH radicals in the plasma. The band gap of N-TiO2 was reduced after NH3/Ar plasma treatment from 3.25 to 3.18 eV. Consequently, the N-TiO2 coating showed enhanced photocatalytic activity under white-light-emitting-diode (LED) irradiation. The photocatalytic degradation rate for the N-TiO2 coating was about 1.4 times higher than that of the undoped TiO2 coating.
Collapse
Affiliation(s)
| | | | | | - Kitty Baert
- Research Group Electrochemical and Surface Engineering , Vrije Universiteit Brussel , Pleinlaan 2 , 1050 Brussels Belgium
| | - Claude Poleunis
- Institute of Condensed Matter and Nanosciences , Université Catholique de Louvain , 1348 Louvain-la-Neuve , Belgium
| | - Alisson Tromont
- Materia Nova Research Center , Parc Initialis , B-7000 Mons , Belgium
| | - Rony Snyders
- Materia Nova Research Center , Parc Initialis , B-7000 Mons , Belgium
- ChIPS, CIRMAP , Université de Mons , 23 Place du Parc , B-7000 Mons , Belgium
| | - Arnaud Delcorte
- Institute of Condensed Matter and Nanosciences , Université Catholique de Louvain , 1348 Louvain-la-Neuve , Belgium
| | - Herman Terryn
- Research Group Electrochemical and Surface Engineering , Vrije Universiteit Brussel , Pleinlaan 2 , 1050 Brussels Belgium
| | | | | | | |
Collapse
|
12
|
Kolev K, Tatchev D, Armyanov S, Valova E, Baert K, Hubin A. Incubation phenomena during UV-pulse excimer laser processing of silicone elastomers. J Appl Polym Sci 2017. [DOI: 10.1002/app.44541] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Konstantin Kolev
- Institute of Physical Chemistry Rostislaw Kaischew Bulgarian Academy of Sciences; Sofia 1113 Bulgaria
| | - Dragomir Tatchev
- Institute of Physical Chemistry Rostislaw Kaischew Bulgarian Academy of Sciences; Sofia 1113 Bulgaria
| | - Stephan Armyanov
- Institute of Physical Chemistry Rostislaw Kaischew Bulgarian Academy of Sciences; Sofia 1113 Bulgaria
| | - Eugenia Valova
- Institute of Physical Chemistry Rostislaw Kaischew Bulgarian Academy of Sciences; Sofia 1113 Bulgaria
| | - Kitty Baert
- Research Group Electrochemical and Surface Engineering; Vrije Universiteit Brussel; Pleinlaan 2 Brussels 1050 Belgium
| | - Annick Hubin
- Research Group Electrochemical and Surface Engineering; Vrije Universiteit Brussel; Pleinlaan 2 Brussels 1050 Belgium
| |
Collapse
|
13
|
Almeida VR, Szpoganicz B, Chou L, Baert K, Hubin A, Bonneville S. Additions and Corrections - Equilibrium and Out-Of-Equilibrium Investigation of Proton Exchange and CuIIand ZnIIComplexation on Fungal Mycelium (Trametes hirsuta). J BRAZIL CHEM SOC 2016. [DOI: 10.5935/0103-5053.20160025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
14
|
Van Erps J, Ciuk T, Pasternak I, Krajewska A, Strupinski W, Van Put S, Van Steenberge G, Baert K, Terryn H, Thienpont H, Vermeulen N. Laser ablation- and plasma etching-based patterning of graphene on silicon-on-insulator waveguides. Opt Express 2015; 23:26639-26650. [PMID: 26480176 DOI: 10.1364/oe.23.026639] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
We present a new approach to remove monolayer graphene transferred on top of a silicon-on-insulator (SOI) photonic integrated chip. Femtosecond laser ablation is used for the first time to remove graphene from SOI waveguides, whereas oxygen plasma etching through a metal mask is employed to peel off graphene from the grating couplers attached to the waveguides. We show by means of Raman spectroscopy and atomic force microscopy that the removal of graphene is successful with minimal damage to the underlying SOI waveguides. Finally, we employ both removal techniques to measure the contribution of graphene to the loss of grating-coupled graphene-covered SOI waveguides using the cut-back method.
Collapse
|
15
|
Adriaens T, Baert K, Breyne P, Casaer J, Devisscher S, Onkelinx T, Pieters S, Stuyck J. Successful eradication of a suburban Pallas’s squirrel Callosciurus erythraeus (Pallas 1779) (Rodentia, Sciuridae) population in Flanders (northern Belgium). Biol Invasions 2015. [DOI: 10.1007/s10530-015-0898-z] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
|
16
|
Geboes B, Baert K, Hubin A, Breugelmans T. Investigation of the Adsorption Mechanism of Heterocyclic Molecules on Copper using Potentiodynamic ORP-EIS and In-situ Ramans pectroscopy. Electrochim Acta 2015. [DOI: 10.1016/j.electacta.2015.01.036] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
|
17
|
Kakaroglou A, Nisol B, Baert K, De Graeve I, Reniers F, Van Assche G, Terryn H. Evaluation of the Yasuda parameter for the atmospheric plasma deposition of allyl methacrylate. RSC Adv 2015. [DOI: 10.1039/c5ra02684a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Plasma density influences the chemistry and the morphology of deposited plasma polymers even under the same energy to monomer ratio.
Collapse
Affiliation(s)
- Alexandros Kakaroglou
- Research Group Electrochemical and Surface Engineering (SURF)
- Department of Materials and Chemistry (MACH)
- Vrije Universiteit Brussel
- 1050 Brussels
- Belgium
| | - Bernard Nisol
- Faculty of Sciences – Analytical and Interfacial Chemistry
- Universitè Libre de Bruxelles
- 1050 Brussels
- Belgium
| | - Kitty Baert
- Research Group Electrochemical and Surface Engineering (SURF)
- Department of Materials and Chemistry (MACH)
- Vrije Universiteit Brussel
- 1050 Brussels
- Belgium
| | - Iris De Graeve
- Research Group Electrochemical and Surface Engineering (SURF)
- Department of Materials and Chemistry (MACH)
- Vrije Universiteit Brussel
- 1050 Brussels
- Belgium
| | - François Reniers
- Faculty of Sciences – Analytical and Interfacial Chemistry
- Universitè Libre de Bruxelles
- 1050 Brussels
- Belgium
| | - Guy Van Assche
- Research Group Physical Chemistry and Polymer Science (FYSC)
- Department of Materials and Chemistry (MACH)
- Vrije Universiteit Brussel
- 1050 Brussels
- Belgium
| | - Herman Terryn
- Research Group Electrochemical and Surface Engineering (SURF)
- Department of Materials and Chemistry (MACH)
- Vrije Universiteit Brussel
- 1050 Brussels
- Belgium
| |
Collapse
|
18
|
Almeida VR, Szpoganicz B, Chou L, Baert K, Hubin A, Bonneville S. Equilibrium and Out-Of-Equilibrium Investigation of Proton Exchange and Cu IIand Zn IIComplexation on Fungal Mycelium ( Trametes hirsuta). J BRAZIL CHEM SOC 2015. [DOI: 10.5935/0103-5053.20150236] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
|
19
|
Porters N, de Rooster H, Bosmans T, Baert K, Cherlet M, Croubels S, De Backer P, Polis I. Pharmacokinetics of oral transmucosal and intramuscular dexmedetomidine combined with buprenorphine in cats. J Vet Pharmacol Ther 2014; 38:203-8. [PMID: 25269566 DOI: 10.1111/jvp.12172] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 09/08/2014] [Indexed: 11/28/2022]
Abstract
Plasma concentrations and pharmacokinetics of dexmedetomidine and buprenorphine after oral transmucosal (OTM) and intramuscular (i.m.) administration of their combination in healthy adult cats were compared. According to a crossover protocol (1-month washout), a combination of dexmedetomidine (40 μg/kg) and buprenorphine (20 μg/kg) was given OTM (buccal cavity) or i.m. (quadriceps muscle) in six female neutered cats. Plasma samples were collected through a jugular catheter during a 24-h period. Plasma dexmedetomidine and buprenorphine concentrations were determined by liquid chromatography-tandem mass spectrometry. Plasma concentration-time data were fitted to compartmental models. For dexmedetomidine and buprenorphine, the area under the plasma concentration-time curve (AUC) and the maximum plasma concentrations (Cmax ) were significantly lower following OTM than following i.m. administration. For buprenorphine, time to reach Cmax was also significantly longer after OTM administration than after i.m. injection. Data suggested that dexmedetomidine (40 μg/kg) combined with buprenorphine (20 μg/kg) is not as well absorbed from the buccal mucosa site as from the intramuscular injection site.
Collapse
Affiliation(s)
- N Porters
- Department of Medicine and Clinical Biology of Small Animals, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium
| | | | | | | | | | | | | | | |
Collapse
|
20
|
Paterson GK, Larsen AR, Robb A, Edwards GE, Pennycott TW, Foster G, Mot D, Hermans K, Baert K, Peacock SJ, Parkhill J, Zadoks RN, Holmes MA. The newly described mecA homologue, mecALGA251, is present in methicillin-resistant Staphylococcus aureus isolates from a diverse range of host species. J Antimicrob Chemother 2012; 67:2809-13. [PMID: 22941897 DOI: 10.1093/jac/dks329] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
OBJECTIVES A previously unidentified mecA homologue, mecA(LGA251), has recently been described in methicillin-resistant Staphylococcus aureus (MRSA) from humans and dairy cattle. The origin and epidemiology of this novel homologue are unclear. The objective of this study was to provide basic descriptive information of MRSA isolates harbouring mecA(LGA251) from a range of host animal species. METHODS A number of S. aureus isolates from historical animal isolate collections were chosen for investigation based on their similarity to known mecA(LGA251) MRSA isolates. The presence of mecA(LGA251) was determined using a multiplex PCR and antimicrobial susceptibility testing performed by disc diffusion. RESULTS MRSA harbouring mecA(LGA251) were found in isolates from a domestic dog, brown rats, a rabbit, a common seal, sheep and a chaffinch. All of the isolates were phenotypically MRSA, although this depended on which test was used; some isolates would be considered susceptible with certain assays. All isolates were susceptible to linezolid, rifampicin, kanamycin, norfloxacin, erythromycin, clindamycin, fusidic acid, tetracycline, trimethoprim/sulfamethoxazole and mupirocin. Five multilocus sequence types were represented (2273, 130, 425, 1764 and 1245) and six spa types (t208, t6293, t742, t6594, t7914 and t843). CONCLUSIONS The discovery of MRSA isolates possessing mecA(LGA251) from a diverse range of host species, including different taxonomic classes, has important implications for the diagnosis of MRSA in these species and our understanding of the epidemiology of this novel mecA homologue.
Collapse
Affiliation(s)
- G K Paterson
- Department of Veterinary Medicine, University of Cambridge, Madingley Road, Cambridge CB3 0ES, UK
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Tavernier P, Baert K, Van de Bildt M, Kuiken T, Cay A, Maes S, Roels S, Gouwy J, Van Den Berge K. A distemper outbreak in beech martens (Martes foina) in Flanders. VLAAMS DIERGEN TIJDS 2012. [DOI: 10.21825/vdt.v81i2.18362] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
An outbreak of distemper was observed in beech martens (Martes foina) in the eastern part of Flanders (Belgium) for the first time. The clinical and pathological findings were consistent with other outbreaks described in mustelids in Europe. Using reverse transcriptase polymerase chain reaction, morbillivirus RNA was detected in an organ homogenate inoculated on Vero.dogSLAM cells. The virus was sequenced and was identified as a canine distemper virus (CDV) strain, hundred percent identical to an earlier isolate from a marten from Germany. After a period of nearly complete absence of beech martens in Flanders due to intensive prosecution, their population density has increased substantially in the last decennia. Although the exact mechanisms behind the observed population changes stay unclear, spread of CDV from central Europe following dispersion of beech martens is indicated by our findings. Further CDV spread could negatively impact on the highly threatened pine marten (Martes martes) and the decreasing polecat (Mustela putorius) populations in Flanders.
Collapse
|
22
|
Aleman M, Das J, Janssens T, Pawlak B, Posthuma N, Robbelein J, Singh S, Baert K, Poortmans J, Fernandez J, Yoshikawa K, Verlinden P. Development and Integration of a High Efficiency Baseline Leading to 23% IBC Cells. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.egypro.2012.07.122] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
23
|
Ceglia A, Meulebroeck W, Baert K, Wouters H, Nys K, Thienpont H, Terryn H. Cobalt absorption bands for the differentiation of historical Na and Ca/K rich glass. SURF INTERFACE ANAL 2011. [DOI: 10.1002/sia.3810] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- A. Ceglia
- Faculty of Engineering, Brussels Photonics team B-PHOT, TONA-FirW; Vrije Universiteit Brussel; Pleinlaan 2 1050 Brussels Belgium
| | - W. Meulebroeck
- Faculty of Engineering, Brussels Photonics team B-PHOT, TONA-FirW; Vrije Universiteit Brussel; Pleinlaan 2 1050 Brussels Belgium
| | - K. Baert
- Faculty of Engineering, Research Group Electrochemical and Surface Engineering, Department of Materials and Chemistry, SURF-FirW; Vrije Universiteit Brussel; Pleinlaan 2 B-1050 Brussels Belgium
| | - H. Wouters
- Department of Art Sciences and Archaeology; Vrije Universiteit Brussel; Pleinlaan 2 1050 Brussels Belgium
| | - K. Nys
- Department of Art Sciences and Archaeology; Vrije Universiteit Brussel; Pleinlaan 2 1050 Brussels Belgium
| | - H. Thienpont
- Faculty of Engineering, Brussels Photonics team B-PHOT, TONA-FirW; Vrije Universiteit Brussel; Pleinlaan 2 1050 Brussels Belgium
| | - H. Terryn
- Faculty of Engineering, Research Group Electrochemical and Surface Engineering, Department of Materials and Chemistry, SURF-FirW; Vrije Universiteit Brussel; Pleinlaan 2 B-1050 Brussels Belgium
| |
Collapse
|
24
|
Bimazubute M, Cambier C, Baert K, Vanbelle S, Chiap P, Gustin P. Penetration of oxytetracycline into the nasal secretions and relationship between nasal secretions and plasma oxytetracycline concentrations after oral and intramuscular administration in healthy pigs. J Vet Pharmacol Ther 2011; 34:176-83. [PMID: 21395609 DOI: 10.1111/j.1365-2885.2010.01210.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The penetration of oxytetracycline (OTC) in plasma and nasal secretions of healthy pigs was evaluated during the first study, in response to oral dose of 20 mg of OTC per kg of body weight (bwt) per day as a 400 mg/kg feed medication (n = 5) and to intramuscular (i.m.)-administered formulations at 10 mg/kg bwt (n = 5), 20 mg/kg bwt (n = 5), 40 mg/kg bwt (n = 5). Concentrations of OTC in plasma and nasal secretions were determined by a validated ultra-high performance liquid chromatography associated to tandem mass spectrometry method (UPLC/MS/MS). The objectives were to select the efficacy treatment and to evaluate the possibility to predict nasal secretions concentrations from those determined in plasma. The animals were housed together in each experiment. In each group, the treatment was administered once daily during 6 consecutive days, and nasal secretions and plasma were collected after 4 and 24 h at day 2 and day 6. For oral administration, only one medicated feed was prepared and distributed to all the animals together and was consumed in approximately 1 h. To meet recommendations of efficacy for OTC in nasal secretions, only the i.m. of 40 mg/kg bwt associated to an inter-dosing interval of 24 h provides and maintains concentrations in nasal secretions ≥1 μg/mL, appropriate to the MIC 50 and 90 of Pasteurella multocida and Bordetella bronchiseptica, respectively, the main pathological strains in nasal secretions. It has been demonstrated that, using a generalized linear mixed model (GLMM), OTC in the nasal secretions (μg/mL) can be predicted taking into account the OTC concentrations in plasma (μg/mL), according to the following equation: OTC(nasal secretions) = 0.28 OTC(plasma) -1.49. In a second study, the pharmacokinetic behaviour of OTC in plasma and nasal secretions of healthy pigs was investigated, after single-dose i.m. of 40 mg/kg bwt of the drug. Blood samples and nasal secretions were collected at predetermined times after drug administration. The data collected in 10 pigs for OTC were subjected to non-compartmental analysis. In plasma, the maximum concentration of drug (C(max) ), the time at which this maximum concentration of drug (T(max) ) was reached, the elimination half-life (t½) and the area under the concentration vs. time curve (AUC) were, respectively, 19.4 μg/mL, 4.0, 5.1 h and 150 μg·h/mL. In nasal secretions, C(max) , T(max) , t½ and AUC were, respectively, 6.29 μg/mL, 4.0, 6.6 h and 51.1 μg·h/mL.
Collapse
Affiliation(s)
- M Bimazubute
- Department of Pharmacology, Pharmacotherapy and Toxicology, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | | | | | | | | | | |
Collapse
|
25
|
Martel A, Van Rooij P, Vercauteren G, Baert K, Van Waeyenberghe L, Debacker P, Garner TWJ, Woeltjes T, Ducatelle R, Haesebrouck F, Pasmans F. Developing a safe antifungal treatment protocol to eliminateBatrachochytrium dendrobatidisfrom amphibians. Med Mycol 2011; 49:143-9. [DOI: 10.3109/13693786.2010.508185] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
|
26
|
Van Waeyenberghe L, Baert K, Pasmans F, van Rooij P, Hellebuyck T, Beernaert L, de Backer P, Haesebrouck F, Martel A. Voriconazole, a safe alternative for treating infections caused by the Chrysosporium anamorph of Nannizziopsis vriesii in bearded dragons (Pogona vitticeps). Med Mycol 2010; 48:880-5. [PMID: 20370369 DOI: 10.3109/13693781003743122] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Dermal and systemic infections caused by the Chrysosporium anamorph of Nannizziopsis vriesii (CANV) are highly prevalent in reptiles and may result in severe disease and high mortality. Due to the high incidence of therapeutic failures, optimizing treatment is required. We first determined in this study the minimal inhibitory concentrations (MIC) of itraconazole, voriconazole, amphotericin B and terbinafine against 32 CANV isolates. For voriconazole, amphotericin B and terbinafine a monomodal MIC distribution was seen, whereas a bimodal MIC distribution was present for itraconazole, indicating acquired resistance in one isolate. Fourteen naturally-infected bearded dragons (Pogona vitticeps), from the same owner, were treated orally with either itraconazole (5 mg/kg q24h) or voriconazole (10 mg/kg q24h). The clinical condition, drug plasma concentrations and the presence of CANV in skin samples were followed. The animals were treated until complete clearance of the fungus. The plasma concentrations of voriconazole and itraconazole exceeded the minimal inhibitory concentrations of the CANV isolates. Elimination of CANV was achieved on average after 27 and 47 days of treatment with itraconazole and voriconazole, respectively. Whereas only 2 out of 7 survived after itraconazole treatment, only a single animal died in the voriconazole treated group. In conclusion, based on a limited number of animals, voriconazole applied at a regimen of 10 mg/kg bodyweight (BW) q24h seems to be a safe and effective antimycotic drug to eliminate CANV infections in bearded dragons.
Collapse
Affiliation(s)
- L Van Waeyenberghe
- Department of Pathology, Bacteriology and Avian diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, Merelbeke, Belgium.
| | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Claeys W, Baert K, Mestdagh F, Vercammen J, Daenens P, De Meulenaer B, Maghuin-Rogister G, Huyghebaert A. Assessment of the acrylamide intake of the Belgian population and the effect of mitigation strategies. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2010; 27:1199-207. [PMID: 20589545 DOI: 10.1080/19440049.2010.489577] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The acrylamide (AA) intake of the Belgian consumer was calculated based on AA monitoring data of the Belgian Federal Agency for the Safety of the Food Chain (FASFC) and consumption data of the Belgian food consumption survey coordinated by the Scientific Institute for Public Health (3214 participants of 15 years or older). The average AA exposure, calculated probabilistically, was 0.4 microg kg(-1) body weight (bw) day(-1) (P97.5 = 1.6 microg kg(-1) bw day(-1)), the main contributors to the average intake being chips (23%), coffee (19%), biscuits (13%), and bread (12%). Additionally, the impact of a number of AA mitigation scenarios was evaluated (German minimization concept, scenarios for mitigation from the literature, signal values), which is an important issue for public health as well as for policy-makers. Specific actions in cooperation with the food industry to reduce the AA content of foods seems to be a more efficient strategy than mere implementation of signal values. Considering that an important share of the AA intake is due to prepared meals, the catering industry as well as consumers need to be better informed on the various possibilities for keeping the AA content of meals as low as possible.
Collapse
Affiliation(s)
- W Claeys
- DG Control Policy, Federal Agency for the Safety of the Food Chain, Boulevard du Jardin botanique 55, Brussels, Belgium.
| | | | | | | | | | | | | | | |
Collapse
|
28
|
Baert K, Duchateau L, De Boever S, Cherlet M, De Backer P. Antipyretic effect of oral sodium salicylate after an intravenousE. coliLPS injection in broiler chickens. Br Poult Sci 2010; 46:137-43. [PMID: 15957432 DOI: 10.1080/0071660500065151] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A study was set up to investigate the influence of sodium salicylate on fever and acute phase reaction after lipopolysaccharide (LPS) injection in broiler chickens. An acute phase reaction was provoked through the intravenous injection of Escherichia coli LPS. Four oral doses of sodium salicylate were tested. Apart from body temperature, other inflammation indices, such as plasma corticosterone and ceruloplasmin, serum thromboxane B2 and zinc concentrations were monitored. Intravenous LPS induced a fever of about 1 degree C. A dose-dependent attenuation of the fever response of the chickens in the salicylate treated groups was observed. LPS-injected chickens also showed elevated plasma corticosterone and ceruloplasmin, while serum thromboxane and zinc concentrations decreased. Except for thromboxane B2, no linear relationship with increasing salicylate dose could be shown for the other blood variables. These data confirm that sodium salicylate is an effective antipyretic agent after injection of LPS in chickens, if used at an appropriate dosage. No dose-related change could be found for the other inflammation indices.
Collapse
Affiliation(s)
- K Baert
- Department of Pharmacology, Pharmacy and Toxicology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
| | | | | | | | | |
Collapse
|
29
|
Baert K, De Boever S, Duchateau L, De Backer P. Sodium salicylate attenuates lipopolysaccharide (LPS)-induced adipsia, but not hypophagia, in broiler chickens. Br Poult Sci 2010; 46:144-8. [PMID: 15957433 DOI: 10.1080/00071660500065243] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
A study was conducted to determine the influence of sodium salicylate on the behaviour and the food and water consumption of broiler chickens after lipopolysaccharide (LPS) injection. An oral dose of 100 mg/kg sodium salicylate was given and an acute phase reaction in broiler chickens was provoked through the intravenous injection of Escherichia coli LPS. Water intake was higher in the LPS and salicylate-treated group than in the positive control group. The salicylate treatment, however, did not restore the food intake, or influence the behaviour of the chickens. These data show that sodium salicylate has a positive effect on the water intake after intravenous injection of LPS in chickens and suggests that there is a difference in mechanism of action of food and water consumption after LPS injection in chickens.
Collapse
Affiliation(s)
- K Baert
- Department of Pharmacology, Pharmacy and Toxicology, Faculty of Veterinary Medicine, Ghent University, Belgium.
| | | | | | | |
Collapse
|
30
|
Bimazubute M, Cambier C, Baert K, Vanbelle S, Chiap P, Albert A, Delporte JP, Gustin P. Penetration of enrofloxacin into the nasal secretions and relationship between nasal secretions and plasma enrofloxacin concentrations after intramuscular administration in healthy pigs. J Vet Pharmacol Ther 2010; 33:183-8. [PMID: 20444043 DOI: 10.1111/j.1365-2885.2009.01123.x] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
The pharmacokinetic behaviour of enrofloxacin (ENRO) in plasma and nasal secretions of healthy pigs was investigated, after a single-dose intramuscular administration of 2.5 mg/kg body weight of the drug. Blood samples and nasal secretions were collected at predetermined times after drug administration. Concentrations of ENRO and its active metabolite ciprofloxacin (CIPRO) were determined in plasma and nasal secretions by high-performance liquid chromatography (HPLC). CIPRO was not detected probably because we investigated young weaned pigs. The data collected in 12 pigs for ENRO were subjected to noncompartmental analysis. In plasma, the maximum concentration of drug (C(max)), the time at which this maximum concentration of drug (T(max)) was reached, the elimination half-life (t(1/2)(beta)) and the area under the concentration vs. time curve (AUC) were, respectively, 694.7 ng/mL, 1.0 h, 9.3 h and 8903.2 ngxh/mL. In nasal secretions, C(max), T(max), t(1/2)(beta) and AUC were, respectively, 871.4 ng/mL, 2.0 h, 12.5 h and 11 198.5 ngxh/mL. In a second experiment conducted in 10 piglets, the relationship between concentrations of ENRO measured in the plasma and the nasal secretions has been determined following single-dose intramuscular administration of 2.5, 10 or 20 mg/kg body weight of the drug. It has been demonstrated that, among several variables, i.e., (1) the dose administered, (2) the time between intramuscular injection and blood sampling, (3) the age, (4) the sex, (5) the animal body weight and (6) the plasma concentration of the drug, only the latter influenced significantly the ENRO concentration in nasal secretions. Practically, using a generalized linear mixed model, ENRO concentrations in the nasal secretions (microg/mL) can be predicted taking into account the ENRO concentrations in plasma (microg/mL), according to the following equation:
Collapse
Affiliation(s)
- M Bimazubute
- Department of Pharmacology, Pharmacotherapy and Toxicology, Faculty of Veterinary Medicine, University of Liège, Liège, Belgium
| | | | | | | | | | | | | | | |
Collapse
|
31
|
Abstract
The aim of the current study was to investigate whether multiple oral dosing of valacyclovir could result in plasma concentrations exceeding the EC(50)-value of acyclovir against equine herpesvirus 1 (EHV1) during the majority of the treatment period. Additionally, we wanted to determine the concentration of acyclovir in nasal mucus and cerebrospinal fluid (CSF). Valacyclovir was administered to four horses and two ponies, three times daily, at a dosage of 40 mg/kg, for four consecutive days. Blood was collected prior to each administration and 1 h after dosing. Nasal mucus samples and CSF were collected once during treatment; 1 h after the last administration. This dosage regimen resulted in plasma concentrations that were higher than the EC(50)-value of 1.7 microg/mL, i.e. EC(50) of an isolate highly susceptible to acyclovir, for 80% of the treatment period; and higher than the EC(50)-value of 3.0 microg/mL, i.e. EC(50) of an isolate less susceptible to acyclovir, for 60% of the treatment period. Concentration in nasal mucus samples and CSF was 0.36-1.17 microg/mL and 0.11-0.23 microg/mL, respectively. This study illustrates that multiple dosing of valacyclovir may result in a therapeutic benefit as plasma concentrations could be maintained above the EC(50)-value of acyclovir against EHV1 for more than 50% of the treatment period. Acyclovir could be detected in both nasal mucus samples and CSF. However, these concentrations were lower than the EC(50).
Collapse
Affiliation(s)
- B Garré
- Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
| | | | | | | | | | | |
Collapse
|
32
|
Di Vece M, Kolaric B, Baert K, Schweitzer G, Obradovic M, Vallée RAL, Lievens P, Clays K. Controlling the photoluminescence of CdSe/ZnS quantum dots with a magnetic field. Nanotechnology 2009; 20:135203. [PMID: 19420489 DOI: 10.1088/0957-4484/20/13/135203] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
We present an investigation of the photoluminescence of CdSe/ZnS quantum dots at high light intensity and in low magnetic fields. Upon increasing the magnetic field up to 90 G, the photoluminescence intensity drops. When decreasing the magnetic field back to zero the photoluminescence drop remains present. A plausible explanation is the Zeeman splitting of defect-associated energy levels under the influence of a magnetic field. The defect-trapped electrons may then be positioned at a metastable level, thereby reducing the number of recombinations. This effect may be used to control the luminescence of quantum dots.
Collapse
Affiliation(s)
- M Di Vece
- Laboratory of Solid State Physics and Magnetism and INPAC-Institute of Nanoscale Physics and Chemistry, K U Leuven, Celestijnenlaan 200D, B-3001, Heverlee, Belgium
| | | | | | | | | | | | | | | |
Collapse
|
33
|
Heyman P, Baert K, Plyusnina A, Cochez C, Lundkvist A, Esbroeck MV, Goossens E, Vandenvelde C, Plyusnin A, Stuyck J. Serological and genetic evidence for the presence of Seoul hantavirus in Rattus norvegicus in Flanders, Belgium. ACTA ACUST UNITED AC 2009; 41:51-6. [PMID: 18821445 DOI: 10.1080/00365540802459994] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Seoul hantavirus (SEOV), carried by Rattus rattus (black rat) and R. norvegicus (Norway, brown rat), was reported to circulate as well as cause HFRS cases in Asia. As Rattus sp. are present worldwide, SEOV has the potential to cause human disease worldwide. In Europe however, only SEOV prevalence in rats from France was reported and no confirmed cases of SEOV infection were published. We here report genetic and serological evidence for the presence of SEOV virus in brown rat populations in Belgium. We also serologically screened an at-risk group that was in contact with R. norvegicus on a daily basis and found no evidence for SEOV infection.
Collapse
Affiliation(s)
- Paul Heyman
- Research Laboratory for Vector-borne Diseases, Queen Astrid Military Hospital, Bruynstraat, Brussels, Belgium.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Beernaert LA, Baert K, Marin P, Chiers K, De Backer P, Pasmans F, Martel A. Designing voriconazole treatment for racing pigeons: balancing between hepatic enzyme auto induction and toxicity. Med Mycol 2009; 47:276-85. [DOI: 10.1080/13693780802262115] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
|
35
|
Reyns T, De Boever S, Baert K, Croubels S, Schauvliege S, Gasthuys F, De Backer P. Disposition and oral bioavailability of amoxicillin and clavulanic acid in pigs. J Vet Pharmacol Ther 2008; 30:550-5. [PMID: 17991223 DOI: 10.1111/j.1365-2885.2007.00910.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The pharmacokinetic properties of amoxicillin and clavulanic acid were studied in healthy, fasted pigs after single intravenous (i.v.) and oral (p.o.) dosage of 20 mg/kg of amoxicillin and 5 mg/kg of clavulanic acid. The plasma concentrations of the drugs were determined by validated high-performance liquid chromatographic methods and the pharmacokinetic parameters were calculated by compartmental and noncompartmental analyses. After i.v. administration of the two drugs, plasma concentration-time curves were best described by a three-compartmental open model for amoxicillin and a two-compartmental open model for clavulanic acid. Amoxicillin (with a t(1/2 gamma) = 1.03 h and a clearance of 0.58 L/h.kg) and clavulanic acid (with a t(1/2 beta) of 0.74 h and a clearance of 0.41 L/h.kg) were both rapidly eliminated from plasma. Both drugs had apparently the same volume of distribution of 0.34 L/kg. After p.o. administration of the two drugs, a noncompartmental model was used. Elimination half-lives of amoxicillin and clavulanic acid were not significantly different, i.e. 0.73 and 0.67 h respectively. The mean maximal plasma concentrations of amoxicillin and clavulanic acid were 3.14 and 2.42 mg/L, and these were reached after 1.19 and 0.88 h respectively. The mean p.o. bioavailability was found to be 22.8% for amoxicillin and 44.7% for clavulanic acid.
Collapse
Affiliation(s)
- T Reyns
- Department of Pharmacology, Toxicology, Biochemistry and Organ Physiology, Ghent University, Merelbeke, Belgium.
| | | | | | | | | | | | | |
Collapse
|
36
|
De Boever S, Beyaert R, Vandemaele F, Baert K, Duchateau L, Goddeeris B, De Backer P, Croubels S. The influence of age and repeated lipopolysaccharide administration on body temperature and the concentration of interleukin-6 and IgM antibodies against lipopolysaccharide in broiler chickens. Avian Pathol 2008; 37:39-44. [DOI: 10.1080/03079450701784875] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Affiliation(s)
- S. De Boever
- a Department of Pharmacology, Toxicology, Biochemistry and Organ Physiology, Faculty of Veterinary Medicine , Ghent University , Merelbeke , Belgium
| | - R. Beyaert
- b Department for Molecular Biomedical Research, VIB , Unit of Molecular Signal Transduction in Inflammation , Ghent , Belgium
- c Department of Molecular Biology , Ghent University , Ghent , Belgium
| | - F. Vandemaele
- d Department Biosystems, Laboratory of Livestock Physiology, Immunology and Genetics, Faculty of Bioscience Engineering, K.U. Leuven , Leuven , Belgium
| | - K. Baert
- a Department of Pharmacology, Toxicology, Biochemistry and Organ Physiology, Faculty of Veterinary Medicine , Ghent University , Merelbeke , Belgium
| | - L. Duchateau
- e Department of Physiology and Biometrics, Faculty of Veterinary Medicine , Ghent University , Merelbeke , Belgium
| | - B. Goddeeris
- d Department Biosystems, Laboratory of Livestock Physiology, Immunology and Genetics, Faculty of Bioscience Engineering, K.U. Leuven , Leuven , Belgium
| | - P. De Backer
- a Department of Pharmacology, Toxicology, Biochemistry and Organ Physiology, Faculty of Veterinary Medicine , Ghent University , Merelbeke , Belgium
| | - S. Croubels
- a Department of Pharmacology, Toxicology, Biochemistry and Organ Physiology, Faculty of Veterinary Medicine , Ghent University , Merelbeke , Belgium
| |
Collapse
|
37
|
Yliniemi K, Vahvaselkä M, Ingelgem YV, Baert K, Wilson BP, Terryn H, Kontturi K. The formation and characterisation of ultra-thin films containing Ag nanoparticles. ACTA ACUST UNITED AC 2008. [DOI: 10.1039/b713313h] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
38
|
De Bosschere H, Casaer J, Neukermans A, Baert K, Ceulemans T, Tavernier P, Roels S. Severe alopecia due to demodicosis in roe deer (Capreolus capreolus) in Belgium. Vet J 2007; 174:665-8. [PMID: 17150390 DOI: 10.1016/j.tvjl.2006.10.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2006] [Revised: 09/08/2006] [Accepted: 10/17/2006] [Indexed: 11/26/2022]
Abstract
Demodex mites are part of the normal fauna of hair follicles of many, if not all, healthy mammal species. Normally these parasites live in harmony with their host, however in states of putative immunosuppression the acarids undergo excessive proliferation and cause clinical disease, which may be localised or generalised. This paper describes four cases of demodicosis in roe deer (Capreolus capreolus) with localised to generalised alopecia.
Collapse
Affiliation(s)
- H De Bosschere
- Veterinary and Agrochemical Research Centre (VAR), Groeselenberg 99, 1180 Brussels (Ukkel), Belgium
| | | | | | | | | | | | | |
Collapse
|
39
|
De Clercq D, van Loon G, Baert K, Tavernier R, Croubels S, De Backer P, Deprez P. Effects of an adapted intravenous amiodarone treatment protocol in horses with atrial fibrillation. Equine Vet J 2007; 39:344-9. [PMID: 17722727 DOI: 10.2746/042516407x182811] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
REASON FOR PERFORMING STUDY Good results have been obtained with a human amiodarone (AD) i.v. protocol in horses with chronic atrial fibrillation (AF) and a pharmacokinetic study is required for a specific i.v. amiodarone treatment protocol for horses. OBJECTIVES To study the efficacy of this pharmacokinetic based i.v. AD protocol in horses with chronic AF. METHODS Six horses with chronic AF were treated with an adapted AD infusion protocol. The protocol consisted of 2 phases with a loading dose followed by a maintenance infusion. In the first phase, horses received an infusion of 6.52 mg AD/kg bwt/h for 1 h followed by 1.1 mg/kg bwt/h for 47 h. In the second phase, horses received a second loading dose of 3.74 mg AD/kg bwt/h for 1 h followed by 1.31 mg/kg bwt/h for 47 h. Clinical signs were monitored, a surface ECG and an intra-atrial electrogram were recorded. AD treatment was discontinued when conversion or any side effects were observed. RESULTS Three of the 6 horses cardioverted successfully without side effects. The other 3 horses did not convert and showed adverse effects, including diarrhoea. In the latter, there were no important circulatory problems, but the diarrhoea continued for 10-14 days. The third horse had to be subjected to euthanasia because a concomitant Salmonella infection worsened the clinical signs. CONCLUSION The applied treatment protocol based upon pharmacokinetic data achieved clinically relevant concentrations of AD and desethylamiodarone. POTENTIAL RELEVANCE Intravenous AD has the potential to be an alternative pharmacological treatment for AF in horses, although AD may lead to adverse drug effects, particularly with cumulative dosing.
Collapse
Affiliation(s)
- D De Clercq
- Department of Large Animal Internal Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium
| | | | | | | | | | | | | |
Collapse
|
40
|
Garré B, Shebany K, Gryspeerdt A, Baert K, van der Meulen K, Nauwynck H, Deprez P, De Backer P, Croubels S. Pharmacokinetics of acyclovir after intravenous infusion of acyclovir and after oral administration of acyclovir and its prodrug valacyclovir in healthy adult horses. Antimicrob Agents Chemother 2007; 51:4308-14. [PMID: 17846132 PMCID: PMC2167972 DOI: 10.1128/aac.00116-07] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The purpose of this study was twofold. The first aim was to evaluate the oral bioavailability and pharmacokinetics (PKs) of acyclovir in horses after intravenous (i.v.) administration and after oral administration of acyclovir and its prodrug, valacyclovir. Second, we aimed to combine these PK data with pharmacodynamic (PD) information, i.e., 50% effective concentrations (EC(50) values) from in vitro studies, to design an optimal dosage schedule. Three treatments were administered to healthy adult horses: 10 mg of acyclovir/kg of body weight delivered as an i.v. infusion over 1 h, 20 mg of acyclovir/kg administered as tablets by nasogastric intubation, and 20 mg of valacyclovir/kg administered as tablets by nasogastric intubation. Total plasma concentrations were measured by a high-performance liquid chromatography method combined with fluorescence detection, while unbound plasma concentrations were determined by liquid chromatography-tandem mass spectrometry. The peak concentration of i.v. acyclovir was approximately 10 mug/ml for both the total and the unbound plasma concentrations. The mean half-life of elimination was between 5.05 h (total concentration) and 11.9 h (unbound concentration). Oral administration of acyclovir resulted in low maximum concentration in plasma (C(max)) and poor bioavailability. A 10-times-higher C(max) and an 8-times-higher bioavailability were achieved with oral administration of valacyclovir. The i.v. administration of 10 mg/kg acyclovir and the oral administration of 20 mg/kg valacyclovir achieved concentrations within the sensitivity range of equine herpesvirus type 1 (EHV-1). The higher bioavailability of valacyclovir makes it an attractive candidate for the prophylactic and/or therapeutic treatment of horses infected with EHV-1. The results from the PK/PD modeling showed that a dosage of 40 mg/kg valacyclovir, administered three times daily, would be sufficient to reach plasma concentrations above the EC(50) values.
Collapse
Affiliation(s)
- B Garré
- Department of Pharmacology, Toxicology, Biochemistry, and Organ Physiology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | | | | | | | | | | | | | | | | |
Collapse
|
41
|
Kimanya M, De Meulenaer B, Tiisekwa B, Ndomondo-Sigonda M, Devlieghere F, Van Camp J, Lachat C, Baert K, Kolsteren P. Assessment of fumonisin exposure to infants consuming maize based complementary foods in Rombo District of Tanzania. Commun Agric Appl Biol Sci 2007; 72:13-17. [PMID: 18018852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Affiliation(s)
- M Kimanya
- Tanzania Food and Drugs Authority, Dar es Salaam, Tanzania
| | | | | | | | | | | | | | | | | |
Collapse
|
42
|
De Mondt R, Baert K, Geuens I, Van Vaeck L, Hubin A. Study of the affinity of thermographic additives for silver by time-of-flight static secondary ion mass spectrometry and surface-enhanced Raman spectroscopy on silver nanoparticles. Langmuir 2006; 22:11360-8. [PMID: 17154626 DOI: 10.1021/la061591v] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Detection of the interactions between low molecular weight organic compounds and metals in the form of sols on a nanoscale is analytically challenging. This study aims to provide experimental evidence using a combination of UV-Vis absorption spectrometry, surface-enhanced Raman spectrometry (SERS), and static secondary ion mass spectrometry (S-SIMS). The field of application is thermography where silver images are formed via heat-catalyzed reactions. Several organic compounds called tone modifiers and stabilizers are used in thermographic materials for the optimization of the image quality. With exploitation of the strengths of each of the above-mentioned methods, an affinity ranking of several tone modifiers and a stabilizer was established on the basis of competitive adsorption experiments using different model systems. Specifically, silver sols, SERS probes, and sputter-coated silver substrates were exposed to systems with one or two additives. The UV-Vis results provided insight on the aggregation of silver nanoparticles in a hydrosol, which was necessary for the interpretation of the SERS data. Both SERS and S-SIMS measurements led to a similar ranking of the relative affinity of the additives in two components, which was largely consistent with empirical knowledge derived from macroscopic behavior.
Collapse
Affiliation(s)
- Roel De Mondt
- Department of Chemistry, University of Antwerp, Universiteitsplein 1, 2610 Wilrijk, Belgium.
| | | | | | | | | |
Collapse
|
43
|
De Clercq D, van Loon G, Baert K, Tavernier R, Croubels S, De Backer P, Deprez P. Intravenous amiodarone treatment in horses with chronic atrial fibrillation. Vet J 2006; 172:129-34. [PMID: 15908245 DOI: 10.1016/j.tvjl.2005.04.001] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Six horses without underlying cardiac disease were presented because of atrial fibrillation of between 5 and 12 months duration. These horses received an intravenous amiodarone treatment of 5mg/kg/h for 1 h followed by 0.83mg/kg/h for 23h and subsequently 1.9mg/kg/h for 30h. During treatment, clinical signs were monitored and a surface ECG and an intra-atrial electrogram were recorded. Infusion was discontinued when sinus rhythm or side effects occurred. Four horses successfully cardioverted, of which one showed symptoms of hind limb weakness and weight shifting. Two horses did not cardiovert and showed similar side effects. In all horses, side effects disappeared within 6h after termination of treatment. Cardiac side effects, such as pro-arrhythmia, were not seen in any of the horses. Total bilirubin slightly increased in three horses and normalised within four days. It was concluded that amiodarone has the potential to treat naturally occurring chronic atrial fibrillation in horses, although further research is needed to refine the infusion protocol.
Collapse
Affiliation(s)
- D De Clercq
- Department of Large Animal Internal Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium.
| | | | | | | | | | | | | |
Collapse
|
44
|
Maes A, Baert K, Croubels S, De Clercq D, van Loon G, Deprez P, De Backer P. Determination of amiodarone and desethylamiodarone in horse plasma and urine by high-performance liquid chromatography combined with UV detection and electrospray ionization mass spectrometry. J Chromatogr B Analyt Technol Biomed Life Sci 2006; 836:47-56. [PMID: 16616880 DOI: 10.1016/j.jchromb.2006.03.038] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2005] [Revised: 02/15/2006] [Accepted: 03/14/2006] [Indexed: 10/24/2022]
Abstract
A rapid method for the quantification of amiodarone and desethylamiodarone in animal plasma using high-performance liquid chromatography combined with UV detection (HPLC-UV) is presented. The sample preparation includes a simple deproteinisation step with acetonitrile. In addition, a sensitive method for the quantification of amiodarone and desethylamiodarone in horse plasma and urine using high-performance liquid chromatography combined with electrospray ionization tandem mass spectrometry (LC-ESI-MS/MS) is described. The sample preparation includes a solid-phase extraction (SPE) with a SCX column. Tamoxifen is used as an internal standard for both chromatographic methods. Chromatographic separation is achieved on an ODS Hypersil column using isocratic elution with 0.01% diethylamine and acetonitrile as mobile phase for the HPLC-UV method and with 0.1% formic acid and acetonitrile as mobile phase for the LC-MS/MS method. For the HPLC-UV method, good linearity was observed in the range 0-5 microg ml(-1), and in the range 0-1 microg ml(-1) for the LC-MS/MS method. The limit of quantification (LOQ) was set at 50 and 5 ng ml(-1) for the HPLC-UV method and the LC-MS/MS method, respectively. For the UV method, the limit of detection (LOD) was 15 and 10 ng ml(-1) for amiodarone and desethylamiodarone, respectively. The LODs of the LC-MS/MS method in plasma were much lower, i.e. 0.10 and 0.04 ng ml(-1) for amiodarone and desethylamiodarone, respectively. The LODs obtained for the urine samples were 0.16 and 0.09 ng ml(-1) for amiodarone and desethylamiodarone, respectively. The methods were shown to be of use in horses. The rapid HPLC-UV method was used for therapeutic drug monitoring after amiodarone treatment, while the LC-MS/MS method showed its applicability for single dose pharmacokinetic studies.
Collapse
Affiliation(s)
- A Maes
- Department of Pharmacology, Toxicology, Biochemistry and Organ Physiology, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium.
| | | | | | | | | | | | | |
Collapse
|
45
|
Abstract
Lidocaine is increasingly used in transdermal drug delivery systems for different pain conditions in human medicine whereby several pharmacokinetic studies have demonstrated minimal systemic absorption in men. In the present study, the pharmacokinetics of a lidocaine patch 5% was studied in six dogs. In the first experiment, one single lidocaine patch was applied for 12 h to the lateral side of the thorax after removing the hair either by clipping or by the application of a depilatory agent, according to a two-way crossover design. No potential adverse effects induced by the patches were observed in either group. In dogs with clipped hair, a mean peak plasma lidocaine concentration of 62.94 ng/ml was obtained after 10.67 h. In the depilatory group, a mean peak plasma concentration of 103.55 ng/ml was reached after 9.27 h. Significant differences in the AUC(0 --> infinity), C(max), k(a) and T(1/2a) were noticed between the two groups. No significant differences were found for the elimination parameters and for T(max). In the second experiment, the patches were applied for 60 h to the clipped skin in order to study the absorption kinetics after a prolonged application period. There, the mean peak lidocaine plasma concentration was 45.18 ng/ml achieved after 24 h and a final concentration of 29.37 ng/ml was obtained at 60 h. In conclusion, all dogs tolerated the transdermal lidocaine patch well. The results of this study suggest that there is an overall minimal absorption from the lidocaine patch. However, the application of a depilatory agent leads to a more rapid and increased absorption of lidocaine.
Collapse
Affiliation(s)
- L Weiland
- Department of Surgery and Anaesthesiology of Domestic Animals, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium.
| | | | | | | | | | | |
Collapse
|
46
|
Abstract
The pharmacokinetic properties of pentoxyfylline and its metabolites were determined in healthy chickens after single intravenous and oral dosage of 100 mg/kg pentoxyfylline. Plasma concentrations of pentoxyfylline and its metabolites were determined by a validated high-performance liquid chromatographic method. After intravenous (i.v.) and oral (p.o.) administration, the plasma concentration-time curves were best described by a one-compartment open model. The mean elimination half-life (t(1/2el)) of pentoxyfylline was 1.05 h, total body clearance 1.90 L/h x kg, volume of distribution 2.40 L/kg and the mean residence time was 2.73 h, after i.v. administration. After oral dosing, mean maximal plasma concentration of pentoxyfylline was 4.01 microg/mL and the interval from p.o. administration until maximum concentration was 1.15 h. The mean oral bioavailability was found to be 28.2%. Metabolites I, IV and V were present in chicken plasma after both i.v. and p.o. administration, with metabolite V being the most dominant.
Collapse
Affiliation(s)
- S De Boever
- Department of Pharmacology, Pharmacy and Toxicology, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium.
| | | | | | | |
Collapse
|
47
|
De Baere S, Wassink P, Croubels S, Boever SD, Baert K, Backer PD. Quantitative liquid chromatographic–mass spectrometric analysis of amoxycillin in broiler edible tissues. Anal Chim Acta 2005. [DOI: 10.1016/j.aca.2004.09.069] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
48
|
Chiers K, Weyens P, Deprez P, Van Heerden M, Meulemans G, Baert K, Croubels S, De Backer P, Ducatelle R. Lingual and pharyngeal paralysis due to acute doxycycline intoxication in veal calves. Vet Rec 2004; 155:25-6. [PMID: 15264487 DOI: 10.1136/vr.155.1.25] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- K Chiers
- Department of Pathology, Bacteriology and Avian Diseases, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, 9820 Merelbeke, Belgium
| | | | | | | | | | | | | | | | | |
Collapse
|
49
|
Baert K, Croubels S, Maes A, Hillaert U, Van Calenbergh S, De Backer P. Comparative metabolic excretion profile of sodium salicylate in broiler chickens and homing pigeons. J Vet Pharmacol Ther 2004; 27:123-7. [PMID: 15096112 DOI: 10.1111/j.1365-2885.2004.00554.x] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- K Baert
- Department of Pharmacology, Pharmacy and Toxicology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium.
| | | | | | | | | | | |
Collapse
|
50
|
Abstract
Sulfonamides and trimethoprim are chemotherapeutics that are extensively used in various animal species. Little information about the pharmacokinetics of these compounds in chickens exists in the literature. In this study, a new commercial formulation of sulfadiazine in combination with trimethoprim was administered both intravenously and orally, according to a crossover design, to healthy, 7-week-old broilers. The plasma concentrations of the drugs were determined by validated high-performance liquid chromatographic methods, and pharmacokinetic parameters were calculated. After intravenous or oral administration of trimethoprim (6.67 mg/kg body weight) and sulfadiazine (33.34 mg/kg body weight), both active substances were rapidly eliminated from the plasma. There was a mean half-life of 1.61 h for trimethoprim and 3.2 h for sulfadiazine. The apparent volumes of distribution (2.2 and 0.43 L/kg, respectively, indicated that the tissue distribution of trimethoprim was more extensive than that of sulfadiazine. The oral bioavailability was approximately 80% for both components.
Collapse
Affiliation(s)
- K Baert
- Department of Pharmacology, Pharmacy and Toxicology, Faculty of Veterinary Medicine, Ghent University, Salisburylaan 133, B-9820 Merelbeke, Belgium.
| | | | | | | |
Collapse
|