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( Pilar BRITO ZERÓN ),( Marta PEREZ DE LIS NOVO ),( Roberto PÉREZ ALVAREZ ),( Pedro MORAL MORAL ),( Aleida MARTÍNEZ ZAPICO ),( Guadalupe FRAILE ),( Eva FONSECA ),( María VAQUERO HERRERO ),( Angela RUI 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
Background: To analyze the therapeutic management and the main epidemiological and clinical characteristics related to survival in a large series of patients with hemophagocytic syndrome (HS) diagnosed in Departments of Internal Medicine. Methods: In June 2013, the Study Group of Autoimmune Diseases (GEAS-SEMI) creates a national registry of patients with HS. Patients were diagnosed according to the fulfillment of the criteria of the Histiocytosis Society in 1991 and updated in 2004. Results: At June 15, 2014, the REGHEM registry included 88 patients with HS, 35 (40%) men and 55 (60%) women, with a mean age at diagnosis of 49.16 years (range 12- 84 years). During the admission that led to the diagnosis of SH, acute infections were identified in 50 (57%) patients, including viruses (n=20), bacteria (n=13), mycobacteria (n=8) and parasites/fungi (n=13). Patients were treated with corticosteroids (n=40), etoposide (n=12), cyclosporin A (n=12), methotrexate (n=4), tacrolimus (n=2) rituximab (n=3), intravenous immunoglobulins (n=2) and chemotherapy (n=5). A total of 44 (50%) patients died. The main factors associated with mortality were analytical parameters at diagnosis such as the presence of severe anemia (Hb <9 g/L, 89% vs 66%, p=0.01), platelet count <100,000/mm3 (96% vs 64%, p<0.001), neutropenia <1000/mm3 (59% vs 39%, p=0.044), and bacterial infections as precipitating agent (77% vs 45%, p=0.034); a clinical presentation including lymphadenopathy was associated with a lower mortality (59% vs 39%, p=0.044). Conclusions: Hemophagocytic syndrome is a severe multisystemic disease associated in nearly 50% of cases with an acute infection, and usually requires vital support in intensive care units. Despite this and the use of a complex therapeutic approach, half of the patients died. The main prognostic factor identified is the presence at diagnosis of severe cytopenias and the coexistence of bacterial infections.
A Novel High Performance Architecture for H.264/AVC Deblocking Filtering
Sebastián López,Felix Tobajas,Gustavo M. Callicó,Pedro A. Perez,Valentin de Armas,Jose F. López,Roberto Sarmiento 한국전자통신연구원 2007 ETRI Journal Vol.29 No.3
This letter presents an architecture based on a new double-filter strategy to perform the adaptive in-loop filtering process specified by the H.264/AVC standard. The proposed architecture shows considerable advantages, both in terms of hardware cost and latency, when compared with the approaches found in the most recent literature.
Bioanode of Polyurethane/Graphite/Polypyrrole Composite in Microbial Fuel Cells
Pedro Perez-Rodriguez,Víctor M. Ovando-Medina,Silvia Y. Martinez-Amador,Jose A. Rodriguez-de la Garza 한국생물공학회 2016 Biotechnology and Bioprocess Engineering Vol.21 No.2
Polyurethane (PU) foams were coated with graphite, and pyrrole monomer was subsequently polymerized onto its surface by chemical oxidization to obtain nanostructured polyurethane/graphite/polypyrrole (PU/Graph/PPy) composites, which were used for anaerobic microorganisms grown and tested as anodes in microbial fuel cells (MFC) using municipal wastewater as fuel. The effects of oxidizing agent type (ammonium persulfate and FeCl3) used in pyrrole polymerization on the performance of electrodes in MFC were studied. Composites were characterized by Fourier Transform Infrared (FTIR) spectroscopy, Scanning Electron Microscopy (SEM), and by the four-point probes to determine conductivity. It was observed from SEM analysis that globular nanostructures of PPy were formed onto PU surface with average diameters between 120 and 450 nm, which are typical of aqueous polymerization of pyrrole monomer. The highest output power density observed in MFCs was 305.5 mW/m3 for the composite synthesized using FeCl3 as the oxidant, and 128.6 mW/m3 using the composite obtained with ammonium persulfate as oxidizing; the corresponding chemical oxygen demand (COD) removal were 48.2 and 45.5%, respectively. The calculated coulombic efficiency for PU/Graph/PPy composite obtained with FeCl3 as oxidant was of 9.4%. Internal resistance of MFC using the composite obtained with FeCl3 as oxidant was determined by linear sweep voltammetry (LSV) and the variable resistance (VR) methods, giving 4.8 and 2.9 kΩ, respectively, with average maximum power density of 237.5 mW/m3.