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Electrochemical generation of ozone on antimony and nickel doped tin oxideWang, Yunhai, 王云海 January 2006 (has links)
published_or_final_version / abstract / Chemistry / Doctoral / Doctor of Philosophy
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Carbon-based negative electrode materials for rechargeable lithium batteriesPerkins, Mark James January 2000 (has links)
No description available.
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A tribological study of arced sugar cane mill roll shells in JamaicaOliver, Gossett Dunn January 2003 (has links)
No description available.
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Electron microscope studies of sodium intercalation in titanium disulphideNgo, G-P. January 1984 (has links)
No description available.
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Ion-selective electrode dynamics for improved pH controlGuy, Nicholas J. H. January 1997 (has links)
No description available.
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Development of enzyme based sensors for use in neurochemistryBerners, Manfred Otto Maria January 1995 (has links)
No description available.
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Characterization of platinum-group metal nanophase electrocatalysts employed in the direct methanol fuel cell and solid-polymer electrolyte electrolyserWilliams, Mario January 2005 (has links)
This study investigated the applicability of various analytical tools for the qualitative and quantitative characterization of nanophase electrocatalysts.
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Spinal cord stimulation with implanted epidural paddle lead relieves chronic axial low back painDavid A. Stidd, Rivero, Sergio, Weinand, Martin 08 1900 (has links)
UA Open Access Publishing Fund / Introduction: Spinal cord stimulation (SCS) provides significant relief for lumbosacral
radiculopathy refractory to both medical and surgical treatment, but historically only offers
limited relief for axial low back pain (LBP). We aim to evaluate the response of chronic axial
LBP treated with SCS using a surgically implanted epidural paddle lead.
Materials and methods: This is a retrospective review of a consecutive series of patients
with exclusive LBP or predominant LBP associated with lower extremity (LE) pain evaluated
and treated with SCS using an implanted paddle lead within the dorsal thoracic epidural space.
Baseline LBP, and if present LE pain, were recorded using the visual analogue scale (VAS) at
an initial evaluation. At a follow-up visit (a minimum of 12 months later), LBP and LE pain
after a spinal cord stimulator implantation were again recorded using the VAS. Patients were
also asked to estimate total LBP pain relief achieved.
Results: Patients with either exclusive (n=7) or predominant (n=2) axial LBP were treated with
SCS by implantation of a paddle lead at an average spine level of T9. The baseline VAS score
for LBP was 7.2; after a follow-up of 20 months, the score decreased to 2.3 (P=0.003). The LE
pain VAS score decreased from 7.5 to 0.0 (P=0.103). Patients also reported a subjective 66.4%
decrease of their LBP at follow-up. There were no surgical complications.
Conclusions: Axial LBP is refractory to many treatments, including SCS. SCS using a surgically
implanted paddle electrode provides significant pain relief for chronic axial LPB, and is
a safe treatment modality
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Etude expérimentale de la microstructure et des propriétés électriques et optiques de couches minces et de nanofils d'oxydes métalliques (d-Bi2O3 et ZnO) synthétisés par voie électrochimique / Experimental study on the microstructure and the physical properties of the metallic oxide thin films and nanowires (delta-Bi2O3 and ZnO) synthesized by electrodepositionLaurent, Kévin 08 July 2008 (has links)
L’intérêt porté sur la miniaturisation des systèmes par la communauté scientifique est grand, que ce soit pour des raisons de mobilité, d’économie d’énergie ou d’innovation technologique. L’objectif de cette thèse est de déterminer les caractéristiques physiques et structurales des couches minces et des nanofils d’oxydes métalliques synthétisés par la méthode électrochimique. La première partie de cette thèse est consacrée à l’oxyde de bismuth en phase delta. Les couches minces élaborés par électrochimie sont de très bonne qualité cristalline, et seul la phase delta- Bi2O3 est présente. Le caractère nano structuré des couches minces est mis en évidence par les expériences de microscopie électronique en transmission (MET) et participe à la stabilisation de cette phase à température ambiante. Les mesures de conductivité réalisées par spectroscopie d’impédance complexe montrent un comportement différent selon la nature du substrat utilisé. Nous observons une excellente conductivité électrique des dépôts réalisés sur les substrats en argent doré (4·10-3 S·cm-1), alors que les dépôts obtenus sur l’inox montre un comportement très résistif (10-7 S·cm-1). La seconde partie de cette étude concerne l’oxyde de zinc. Les conditions d’élaboration par électrochimie influence les propriétés structurales et physiques des couches minces obtenues. Les différents traitements thermiques réalisés sur les couches minces de ZnO ont permis d’améliorer la qualité optique des couches et de modifier la structure du ZnO par incorporation d’azote lors de recuit dans l’ammoniaque. La dernière partie est consacrée à la synthèse et à la caractérisation de nanofils de ZnO élaborés par la méthode « template ». Cette méthode nous a permis de confiner la croissance par électrochimie dans des pores de différents diamètres. Les observations réalisés par MET et MET en Haute Résolution montrent que les nanofils obtenus sont monocristallins et de bonne qualité. Les propriétés d’émission observées en PL sont très proches des propriétés d’émission des couches minces / The growing interest towards micro and nano devices has improved in the recent years. This interest arises from the need of mobility devices, energy savings or technologic innovation. The aim of the present work is to determine structural and physical properties of electrodeposited metallic oxide thin film and nanowires. The first part of this work will treat the case of bismuth oxide in delta phase. Electrodeposition method is used to stabilized the delta phase at room temperature, structure studies revealed a good cristallinity of the films and the high purity of the deposit. The stability of delta-Bi2O3 at room temperature is probably due to the nanostructuration of the deposit which had been observed in TEM experiments. The electrical behaviour of the film different from the substrate used to perform electrodeposition. We observed an excellent electrical conductivity (4·10-3 S·cm-1) from samples deposited on gilded silver, while low conductivity of the film is observed when deposit on stainless steel (10-7 S·cm-1). The second part of this work deal with zinc oxide thin film electrodeposited from aqueous solution. The experimental conditions used to perform electrodeposition have been found to influence structural and physical properties of the electrodeposited ZnO. Thermal treatment applied to electrodeposited ZnO improve the crystal quality and annealing under NH3 atmosphere at 400°C induced the formation of Zn:N bonds in the deposit. The last part of this report is related to the fabrication of ZnO nanowires using template method. This method has allowed us to restrict the growth of the ZnO into Nanopores. Observations made using TEM and HR-TEM, shows that electrodeposited nanowires are of a good crystal quality and monocrystalline. PL experiments have revealed that the emission is very close to the emission observed for the ZnO thin film
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Understanding two-phase reaction processes in electrodes for Li-ion batteriesLiu, Hao January 2015 (has links)
No description available.
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