1,217 research outputs found
16: Long-Term Results of a Gitmo Retrospective Study on Hematopoietic Stem Cell Transplantation (HSCT) for Paroxysmal Nocturnal Hemoglobinuria (PNH)
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Status of Salerno Laboratory (Measurements in Nuclear Emulsion)
A report on the analysis work in the Salerno Emulsion Laboratory is
presented. It is related to the search for nu_mu->nu_tau oscillations in CHORUS
experiment, the calibrations in the WANF (West Area Neutrino Facility) at Cern
and tests and preparation for new experiments.Comment: Proc. The First International Workshop of Nuclear Emulsion Techniques
(12-24 June 1998, Nagoya, Japan), 15 pages, 11 figure
Yttrium doped Barium cerate and Zirconate heterostructures: deposition and electrochemical characterization
Epitaxial heterostructures consisting of an yttrium doped barium
cerate (BCY) layer sandwiched between two yttrium doped barium
zirconate (BZY) thin layers have been deposited on insulating
(001) MgO substrates by pulsed laser deposition. The first BZY
layer was aimed at improving the lattice match with the MgO
substrate, the second at protecting the BCY layer. Ionic
conductivity has been studied in the 300 – 600°C temperature
range as a function of the BCY thickness. Due to the absence of
blocking grain boundaries, heterostructures showed a conductivity
larger than that of BCY pellets sintered under optimized
conditions
La0.8Sr0.2Ga0.8Mg0.2O3-δ thin films for IT-SOFCs: Microstructure and transport properties correlation.
Highly textured La0.8Sr0.2Ga0.8Mg0.2O3 (LSGM) films with columnar structure were grown by pulsed laser
deposition on (001) NdGaO3 and SrTiO3 buffered (001) MgO substrates. Combined analysis of the films
structure and morphology and EIS measurements showed that the transport properties are mainly
limited by perpendicular grain boundaries effects. Increasing the film thickness, columnar nanosized
grains tend to coalesce leading to a decrease of grain boundary concentration, hence to enhanced
conductivity
Spin-coated La0.8Sr0.2Ga0.8Mg0.2O3-δ Electrolyte on Infiltrated Anodes for Direct Methane Fuel Cells
Dense micrometric La0.8Sr0.2Ga0.8Mg0.2O3-δ (LSGM) films were
deposited by spin-coating on porous LSGM scaffolds characterized
by homogeneous pore structure. Porous anodes were infiltrated
with aqueous nickel and nickel/copper nitrate solutions, dried and
fired at 700°C. Homogeneous metal coating with proper
interconnection was observed by SEM, chemical stability was
confirmed by XRD, and electrical characterization of anodic
substrates was performed. Catalytic activity of different anodes
was evaluated ex-situ in a quartz micro-reactor fed with CH4:CO2
mixtureat range 650 and 700°C. To investigate the redox
properties of the metallic phases, the anodic substrates were
subjected to redox ageing cycles and characterized by H2-TPR
Nickel-based structured catalysts for indirect internal reforming of methane
A structured catalyst for the dry reforming of methane (DRM) was investigated as a biogas pre-reformer for indirect internal reforming solid oxide fuel cell (IIR-SOFC). For this purpose, a NiCrAl open-cell foam was chosen as support and Ni-based samarium doped ceria (Ni-SmDC) as catalyst. Ni-SmDC powder is a highly performing catalyst showing a remarkable carbon resistance due to the presence of oxygen vacancies that promote coke gasification by CO2 activation. Ni-SmDC powder was deposited on the metallic support by wash-coating method. The metallic foam, the powder, and the structured catalyst were characterized by several techniques such as: N2 adsorption-desorption technique, X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDX), focused ion beam (FIB), temperature programmed reduction (H2-TPR), and Raman spectroscopy. Catalytic tests were performed on structured catalysts to evaluate activity, selectivity, and stability at SOFC operating conditions
Transcatheter Mitral Valve-in-Valve Dislocation: A Rescue Strategy
In the transcatheter aortic valve replacement era, transapical valve-in-valve mitral valve implantation is considered an alternative treatment for high-risk patients with degenerated mitral bioprosthesis. We report an unusual strategy to remedy the potentially fatal complication of the mitral prosthesis migration into the aortic arch. The dislocated prosthesis was successfully stabilized in the aortic arch with a bare aortic stent, ensuring adequate perfusion of epiaortic vessels. \ua9 2018 The Society of Thoracic Surgeon
Ruptured Brain Arteriovenous Malformations: Surgical Timing and Outcomes-A Retrospective Study of 25 Cases
Background One important problem in treatment of ruptured brain arteriovenous malformations (bAVMs) is surgical timing. The aim of the study was to understand which parameters affect surgical timing and outcomes the most. Materials and Methods Between January 2010 and December 2018, 25patients underwent surgery for a ruptured bAVM at our institute. Intracerebral hemorrhage (ICH) score was used to evaluate hemorrhage severity, while Spetzler-Martin scale for AVM architecture. We divided patients in two groups: early surgery and delayed surgery. The modified Rankin Scale (mRS) evaluated the outcomes. Results Eleven patients were in the early surgery group: age 38 ± 18 years, Glasgow Coma Scale (GCS) 7.64 ± 2.86, ICH score 2.82 ± 0.71, hematoma volume 45.55 ± 23.21 mL. Infratentorial origin of hemorrhage was found in 27.3% cases; AVM grades were I to II in 82%, III in 9%, and IV in 9% cases. Outcome at 3 months was favorable in 36.4% cases and in 54.5% after 1 year. Fourteen patients were in the delayed surgery group: age 41 ± 16 years, GCS 13.21 ± 2.39, ICH score 1.14 ± 0.81, hematoma volume 29.89 ± 21.33 mL. Infratentorial origin of hemorrhage was found in 14.2% cases; AVM grades were I to II in 50% and III in 50%. Outcome at 3 months was favorable in 78.6% cases and in 92.8% after 1 year. Conclusions The early outcome is influenced more by the ICH score, while the delayed outcome by Spetzler-Martin grading. These results suggest that it is better to perform surgery after a rest period, away from the hemorrhage when possible. Moreover, this study suggests how in young patient with a high ICH score and a low AVM grade, early surgery seems to be a valid and feasible therapeutic strategy
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