Searched for: subject:"Fluorides"
(1 - 20 of 31)

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Zhao, D. (author), Katsouras, I. (author), Asadi, K. (author), Groen, W.A. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author)
A homogeneous ferroelectric single crystal exhibits only two remanent polarization states that are stable over time, whereas intermediate, or unsaturated, polarization states are thermodynamically instable. Commonly used ferroelectric materials however, are inhomogeneous polycrystalline thin films or ceramics. To investigate the stability of...
article 2016
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Vermaire, J.H. (author), van Loveren, C. (author)
A randomized controlled study of caries prevention strategies was conducted on patients with a mixed socioeconomic status in a large general dental practice in the Netherlands. A group of children following a non-operative caries treatment programme (NOCTP) was compared to a control group and a group that also received 2 topical fluoride...
article 2015
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Trueba, A.T. (author), Radović, I.R. (author), Zevenbergen, J.F. (author), Peters, C.J. (author), Kroon, M.C. (author)
The kinetics of formation of semi-clathrate hydrates of tetra n-butyl ammonium fluoride (TBAF) with hydrogen (H2) and carbon dioxide (CO2) were studied in order to elucidate their potential for H 2 storage as well as for CO2 sequestration. The influence of pressure, TBAF concentration (1.8 mol% and 3.4 mol%) and formation method (T-cycle method...
article 2013
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Li, M. (author), Stingelin, N. (author), Michels, J.J. (author), Spijkman, M.-J. (author), Asadi, K. (author), Beerends, R. (author), Biscarini, F. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author)
The processing of solution-based binary blends of the ferroelectric random copolymer poly(vinylidene fluoride-trifluoroethylene) P(VDF-TrFE) and the semiconducting polymer poly(9,9-dioctylfluorenyl-2,7-diyl) (PFO) applied by spin-coating and wire-bar coating is investigated. By systematic variation of blend composition, solvent, and deposition...
article 2012
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Kam, B. (author), Li, X. (author), Cristoferi, C. (author), Smits, E.C.P. (author), Mityashin, A. (author), Schols, S. (author), Genoe, J. (author), Gelinck, G.H. (author), Heremans, P. (author)
In this work, we investigate the ferroelectric polarization state in metal-ferroelectric-semiconductor-metal structures and in ferroelectric field-effect transistors (FeFET). Poly(vinylidene fluoride-trifluoroethylene) and pentacene was used as the ferroelectric and semiconductor, respectively. This material combination in a bottom gate-top...
article 2012
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Asadi, K. (author), Wondergem, H.J. (author), Moghaddam, R.S. (author), McNeill, C.R. (author), Stingelin, N. (author), Noheda, B. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author)
The operation of resistive switches based on phase-separated blends of organic ferroelectrics and semiconductors depends significantly on the microstructure of such systems. A wide range of analysis techniques are used to characterize spin-coated films of the ferroelectric random copolymer poly(vinylidene fluoride-trifluoroethylene) [P(VDF-TrFE)...
article 2011
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Asadi, K. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author)
Staggered bottom-contact top-gate organic ferroelectric field-effect transistors are fabricated with poly(vinylidene fluoride-trifluoroethylene) (P(VDF-TrFE)) as ferroelectric gate and poly[bis(4-phenyl)(2,4,6- trimethylphenyl)amine] as semiconductor. Polarization reversal of the ferroelectric gate is monitored by displacement transients in the...
article 2011
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Asadi, K. (author), Wildeman, J. (author), Blom, P.W.M. (author), de Leeuw, D.M. (author), TNO Industrie en Techniek (author)
Resistive switches have been fabricated using a phase-separated blend film of ferroelectric random copolymer poly(vinylidene fluoride-co-trifluoroethylene) with the organic semiconductor regio-irregular poly(3-hexylthiophene) (rir-P3HT). Spin-coated blend films have been contacted with symmetrical Ag top and Ag bottom electrodes, yielding...
article 2010
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van der Meer, J.A. (author), Trap, H.C. (author), Noort, D. (author), van der Schans, M.J. (author), TNO Defensie en Veiligheid (author)
Recently, several methods have been developed to verify exposure to nerve agents. Most of these methods, such as the fluoride reactivation technique and the analysis of inhibited phosphonylated butyrylcholinesterase (BuChE), are based on mass spectrometry. The high specificity of the mass spectrometer might also imply a disadvantage, because the...
article 2010
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Rusch, G.M. (author), Bowden, A.M. (author), Muijser, H. (author), Arts, J. (author), TNO Kwaliteit van Leven (author)
The objectives of this study were to examine the respiratory irritancy of boron trifluoride (BF3) and fluorosulfonic acid (FSA) following acute inhalation exposure. Testing was conducted using groups of 10 male and 10 female rats (BF3) or groups of 6 male rats (FSA). Rats were exposed for a single 4-h period (BF3) or a single 1-h period (FSA)...
article 2008
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Degenhardt, C.E.A.M. (author), Pleijsier, K. (author), van der Schans, M.J. (author), Langenberg, J.P. (author), Preston, K.E. (author), Solano, M.I. (author), Maggio, V.L. (author), Barr, J.R. (author), Prins Maurits Laboratorium TNO (author)
One of the most appropriate biomarkers for the verification of organophosphorus nerve agent exposure is the conjugate of the nerve agent to butyrylcholinesterase (BuChE). The phosphyl moiety of the nerve agent can be released from the BuChE enzyme by incubation with fluoride ions, after which the resulting organophosphonofluoridate can be...
article 2004
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van der Schans, M.J. (author), Pleijsier, K. (author), van der Wiel, H.J. (author), Boone, C.M. (author), Langenberg, J.P. (author), Prins Maurits Laboratorium TNO (author)
Human butyrylcholinesterase (HuBuChE) is the most promising scavenger for use as a pretreatment drug against nerve agents. Although in animal studies pretreatment with HuBuChE appeared to improve the survival rate following nerve agent challenges and to alleviate post-exposure incapacitation, the information reported so far is insufficient for a...
conference paper 2004
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van der Schans, M.J. (author), Langenberg, J.P. (author), Benschop, H.P. (author), Prins Maurits Laboratorium TNO (author)
Traditional multidrug therapy of organophosphorus nerve agent poisoning has several drawbacks such as postexposure incapacitation while optimal timing of administration of the drugs is also crucial. A priori, sequestration of the agent before it can reach its physiological targets would provide optimal protection. Within this context, a plethora...
conference paper 2004
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Prins Maurits Laboratorium TNO (author), van der Schans, M.J. (author), Polhuijs, M. (author), van Dijk, C. (author), Degenhardt, C.E.A.M. (author), Pleijsier, K. (author), Langenberg, J.P. (author), Benschop, H.P. (author)
The utility was explored of a new approach to detect retrospectively exposure to nerve agents by means of conversion of the inhibitor moiety bound to the active site of the enzyme BuChE in plasma with fluoride ions into a phosphofluoridate which is subsequently analyzed by means of gas chromatography (GC). This quantifies ≥0.01% inhibition of...
article 2004
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van Helden, H.P.M. (author), Trap, H.C. (author), Oostdijk, J.P. (author), Kuijpers, W.C. (author), Langenberg, J.P. (author), Benschop, H.P. (author), Prins Maurits Laboratorium TNO (author)
Realistic scenarios for low-level exposure to nerve agents will often involve exposures over several hours to extremely low doses of agent. In order to expose animals to the lowest controllable concentrations of agent and to increase exposure times until a lowest observable effect level (LOEL) becomes measurable, a validated system was developed...
article 2003
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Schuller, A.A. (author), Kalsbeek, H. (author)
Purpose was to study the effect of professionally applied topical fluoride on oral health status on the population level in adolescents with lower socio-economic status. Adolescents attending dental clinics where professional fluoride application is a routine procedure (high-fluoride group) were compared to adolescents from other clinics (low...
article 2003
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Kalsbeek, H. (author), Poorterman, J.H. (author), Eijkman, M.A. (author), Verrips, G.H. (author)
In 1987, 1993 and 1999 an epidemiological study on oral health was performed in youngsters aged 5, 11, 17 or 23 years, in whom oral health care was covered by a health insurance fund. To obtain data on dental attendance, oral hygiene habits and the use of fluoride tablets questionnaires were used; data on the prevalence of dental plaque and...
article 2002
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Izeboud, C.A. (author), Vermeulen, R.M. (author), Zwart, A. (author), Vos, H.P. (author), van Miert, A.S.J.P.A.M. (author), Witkamp, R.F. (author)
Previous research has shown that β-adrenoceptor (β-AR) agonists have potent anti-inflammatory capabilities, e.g. represented by suppression of release of the proinflammatory cytokines. Aim of this research was to determine whether the effects of β-agonists on LPS-induced TNFα and IL-10 release are influenced by their different stereochemistry....
article 2000
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Energieonderzoek Centrum Nederland (author), Hensen, A. (author)
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report 2000
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Noort, D. (author), Hulst, A.G. (author), Platenburg, D.H.J.M. (author), Polhuijs, M. (author), Benschop, H.P. (author), Prins Maurits Laboratorium TNO (author)
A convenient and rapid micro-anion exchange liquid chromatography (LC) tandem electrospray mass spectrometry (MS) procedure was developed for quantitative analysis in serum of O-isopropyl methylphosphonic acid (IMPA), the hydrolysis product of the nerve agent sarin. The mass spectrometric procedure involves negative or positive ion electrospray...
article 1998
Searched for: subject:"Fluorides"
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