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  • 1
    Language: English
    In: Separation and Purification Technology, 2011, Vol.80(1), pp.96-104
    Description: ► Carbon prepared from almond shells and olive stones present a high CO adsorption capacity at 303 K. ► Aminated almond shells carbon, AN, showed the highest CO capacity on a volumetric basis and fast adsorption dynamics. ► Sample AN achieved productivities of up to 2.1 mol kg h and CO recoveries of up to 97% under VTSA cycles. Low cost carbons obtained from biomass residues, olive stones and almond shells, were evaluated as CO adsorbents in postcombustion conditions (low CO partial pressure). These carbons were prepared from biomass chars by means of two different methods: physical activation with CO and amination. All the prepared carbons present a high CO adsorption capacity at 303 K, although carbons developed from almond shells show a superior CO /N selectivity (lower N adsorption) than those obtained from olive stones. In general, activated samples present faster adsorption kinetics due to the presence of transport pores, although they have lower densities. On the other hand, aminated samples have narrower porosities but higher volumetric capacities. Among the samples studied, aminated almond shells were selected as the most promising adsorbent, due to their high CO adsorption capacity and selectivity and their good adsorption kinetics. To assess the performance of these samples in cyclic adsorption/desorption processes, basic two-step cycle configurations were evaluated by the following regeneration strategies: temperature swing adsorption (TSA), vacuum swing adsorption (VSA) and a combination of both (VTSA). Aminated almond shells showed no sign of deactivation after 13 h of continuous TSA cycling between 303 and 373 K, nor during VSA or VTSA cycling.
    Keywords: CO 2 Capture ; Postcombustion ; Adsorption ; Biomass ; Vtsa ; Engineering
    ISSN: 1383-5866
    E-ISSN: 1873-3794
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  • 2
    Language: English
    In: Chemical Engineering Journal, Sept 15, 2010, Vol.163(1-2), p.41(7)
    Description: To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.cej.2010.07.030 Byline: M.G. Plaza, S. Garcia, F. Rubiera, J.J. Pis, C. Pevida Keywords: CO.sub.2 capture, Adsorption cycles, Activated carbon Abstract: A commercial activated carbon supplied by Norit, R2030CO2, was evaluated as CO.sub.2 adsorbent under conditions relevant to post-combustion CO.sub.2 capture (ambient pressure and diluted CO.sub.2). It has been demonstrated that this carbon possesses sufficient CO.sub.2/N.sub.2 selectivity in order to efficiently separate a binary mixture composed of 17% CO.sub.2 in N.sub.2. Moreover, this carbon was easily completely regenerated and it did not show capacity decay after 10 consecutive cycles. Three different regeneration strategies were compared in a single-bed adsorption unit: temperature swing adsorption (TSA), vacuum swing adsorption (VSA) and a combination of them, vacuum and temperature swing adsorption (VTSA). Through a simple two step TSA cycle, CO.sub.2 was concentrated from 17 to 43vol%. For the single-bed cycle configurations, the productivity and CO.sub.2 recovery followed the sequence: TSA〈VSA〈VTSA. Values of productivity up to 1.9molkg.sup.-1 h.sup.-1 and a maximum CO.sub.2 recovery of 97% were reached. Author Affiliation: Instituto Nacional del Carbon, CSIC, Apartado 73, 33080 Oviedo, Spain Article History: Received 31 March 2010; Revised 7 July 2010; Accepted 9 July 2010
    Keywords: Swing ; Carbon ; Activated Carbon ; Strategy ; Regeneration ; Adsorption ; Carbon Dioxide ; Productivity ; Materials Development (Ep) ; Materials Development (Ed) ; Materials Development (EC);
    ISSN: 1385-8947
    Source: Cengage Learning, Inc.
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  • 3
    Language: English
    In: Journal of Controlled Release, 28 September 2015, Vol.214, pp.76-84
    Description: Highly aggressive cancer types such as pancreatic cancer possess a mortality rate of up to 80% within the first 6 months after diagnosis. To reduce this high mortality rate, more sensitive diagnostic tools allowing an early stage medical imaging of even very small tumours are needed. For this purpose, magnetic, biodegradable nanoparticles prepared using recombinant human serum albumin (rHSA) and incorporated iron oxide (maghemite, -Fe O ) nanoparticles were developed. Galectin-1 has been chosen as target receptor as this protein is upregulated in pancreatic cancer and its precursor lesions but not in healthy pancreatic tissue nor in pancreatitis. Tissue plasminogen activator derived peptides (t-PA-ligands), that have a high affinity to galectin-1 have been chosen as target moieties and were covalently attached onto the nanoparticle surface. Improved targeting and imaging properties were shown in mice using single photon emission computed tomography–computer tomography (SPECT–CT), a handheld gamma camera, and magnetic resonance imaging (MRI).
    Keywords: Rhsa Nanoparticles ; Maghemite ; T-PA-Ligands to Galectins ; T-Papeptide1lac ; Single Photon Emission Computed Tomography–Computer Tomography (Spect–CT) ; Handheld Gamma Camera ; Magnetic Resonance Imaging (Mri) ; Pharmacy, Therapeutics, & Pharmacology
    ISSN: 0168-3659
    E-ISSN: 1873-4995
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  • 4
    Language: Spanish
    In: Acta ortopedica mexicana, 2012, Vol.26(4), pp.235-44
    Description: We conducted an ambispective cohort study of 83 patients with a diagnosis of Lisfranc fracture dislocation from 1993 to 2008. The lesions were classified into two groups: pure dislocations and fracture dislocations of the Lisfranc joint using the Hardcastle-Reschamer classification. The results included the following data: sociodemographic and epidemiologic variables, lesion-related variables, clinical parameters, and the following clinical and functional assessment scales: Baltimore Painful Foot Score, Creighton-Nebraska Health Foundation, American Orthopaedic Foot and Ankle Society (AOFAS), and Hannover Scoring System. Sixty-three patients were treated surgically. Closed reduction and minimally invasive fixation with Kirschner nails were performed in 53 patients (63.9%), and open reduction with a dorsal approach and fixation with Kirschner nails in 10 cases (15.2%). In 46 cases de medial column was fixed, in 61 cases the intermediate column, and in 42 the lateral column. Sixty-six (79.5%) of the patients had complications including both acute and late ones. Regardless of the technique used, the purpose of treatment was the anatomical reduction of the involved joints. Based on our experience, we think that the use of Kirschner nails is effective, as it provides enough stiffness and stability. In general terms, this injury is not as disabling as it had been considered in the literature. Patients consider their discomfort as tolerable and compatible with the demands of their activities of daily living and they may perform their work considering the time limitations.
    Keywords: Fractures, Bone -- Surgery ; Joint Dislocations -- Surgery ; Metatarsal Bones -- Injuries ; Multiple Trauma -- Surgery ; Tarsal Joints -- Injuries
    ISSN: 2306-4102
    Source: MEDLINE/PubMed (U.S. National Library of Medicine)
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  • 5
    Language: Spanish
    In: Acta ortopedica mexicana, 2010, Vol.24(1), pp.3-7
    Description: Early fracture fixation is increasingly common in medical practice, and femur shaft fractures are the perfect prototype of the lesion warranting early surgery in polytraumatized patients. Damage control orthopedics (DCO) is defined as the minimally-traumatic interventions intended to provide quick stabilization of orthopedic injuries to minimize the systemic inflammatory response. By means of an evidence-based medicine tool (CAT) we approach the benefit of long-bone fracture stabilization in polytraumatized patients trying to answer a specific clinical question from a concrete situation: What is the evidence of the safety and benefit of early stabilization of long-bone fractures in polytraumatized patients? The patient group whose fractures were stabilized after 48 hours had more clinical complications, alterations of lung parameters and a longer hospital stay. There is no complete evidence showing that early stabilization of long bones in patients with moderate or severe head trauma worsens or improves the outcomes. Urgent fracture stabilization should be an adjuvant to resuscitation. Early fracture stabilization contributes to reducing the ICU stay, the incidence of acute respiratory distress syndrome (ARDS), multiple organ failure (MOF) and sepsis, thus improving patient survival.
    Keywords: Evidence-Based Medicine ; Fracture Fixation ; Multiple Trauma ; Femoral Fractures -- Surgery
    ISSN: 2306-4102
    Source: MEDLINE/PubMed (U.S. National Library of Medicine)
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  • 6
    Language: Spanish
    In: Revista del Pie y Tobillo, November 2010, Vol.24(2), pp.31-34
    Description: La osteomielitis subaguda es una infección hematógena del hueso definida como una forma de osteomielitis no supurativa esclerosante que habitualmente pasa desapercibida en estadios precoces dada su clínica insidiosa caracterizada por buen estado del paciente, así como una historia de dolor de larga evolución. Presentamos un caso de osteomielitis subaguda que, por la edad de presentación, la patología asociada del paciente y la localización de la misma, debe hacer replantearnos las distintas opciones de tratamiento asumiendo las posibles complicaciones y fracasos. Subacute osteomyelitis is a haematogenous infection of bone defined as a non-suppurative, sclerosing form of osteomyelitis which usually escapes detection in its early stages because of its insidious clinical features (good general condition of the patient and a long-lasting history of pain). We report one case of subacute osteomyelitis which, because of its location, the age at presentation and the patient's associated pathology should prompt consideration of the various therapeutic options and assumption of the possible complications and therapeutic failures.
    Keywords: Osteomielitis Subaguda ; Diabetes Mellitus ; Opciones Terapéuticas ; Subacute Osteomyelitis ; Diabetes Mellitus ; Therapeutic Options
    ISSN: 1697-2198
    Source: ScienceDirect Journals (Elsevier)
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  • 7
    Language: Portuguese
    In: Medicina Intensiva, 01 November 2012, Vol.36(8), pp.531-539
    Description: Objetivos: No se han podido desarrollar modelos predictores de tiempo de decanulación de pacientes traqueotomizados. El objetivo del estudio fue desarrollar variables asociadas al tiempo empleado en decanular a los pacientes, mediante la clasificación de los pacientes según la indicación de la traqueotomía (TRQ). Diseño: Estudio de cohortes prospectivo observacional. Ámbito: Dos UCI médico-quirúrgicas. Pacientes: Se incluyeron todos los pacientes traqueotomizados en UCI, excluyendo aquellos con órdenes de no resucitación, TRQ crónicas, enfermos neuromusculares o con daño cerebral. Fueron clasificados en 2 grupos: traqueotomizados por ventilación mecánica o destete prolongado (Grupo 1) y pacientes traqueotomizados por disminución del nivel de conciencia o incapacidad para manejar las secreciones respiratorias (Grupo 2). Intervenciones: Se empleó un protocolo de destete y decanulación. Variables de interés principales: Se recogieron entre otras las siguientes variables: tiempo hasta decanulación, capacidad vital y flujo espiratorio máximo, necesidades de aspiración, Glasgow Coma Store (GCS), características de las secreciones respiratorias y función deglutoria. Se realizó un análisis multivariable proporcional de Cox, siendo el tiempo hasta decanulación la variable dependiente. Resultados: De 227 pacientes traqueotomizados, 151 fueron incluidos en el estudio. El estudio multivariable seleccionó en el grupo 1 las variables: género masculino (HR 1,74 [1,04-2,89], p= 0,03), edad 〉60 años (HR 0,58 [0,36-0,91], p= 0,02), requerimiento de aspiraciones elevado (HR 0,81 [0,67-0,97], p= 0,02), capacidad vital forzada menor (HR 0,48 [0,28-0,82], p〈0,01), y flujo espiratorio pico bajo (HR 0,25 [0,14-0,46], p〈0,01); y en el grupo 2 con GCS 〉13 (HR 2,73 [1,51-4,91], p〈0,01), requerimiento de aspiraciones elevado (HR 0,7 [0,54-0,91], p〈0,01), y deglución inadecuada (HR 1,97 [1,11-3,52], p=0,02). Conclusión: las variables asociadas con el tiempo hasta decanulación en pacientes críticos difieren según la indicación de la traqueotomía.
    Keywords: Ventilación Mecánica ; Destete Ventilatorio ; Traqueotomía ; Decanulacion ; Pronóstico ; Mechanical Ventilation ; Weaning ; Tracheostomy ; Decannulation ; Outcome ; Medicine
    ISSN: 0210-5691
    E-ISSN: 15786749
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  • 8
    Language: English
    In: Medicina Intensiva (English Edition), November 2012, Vol.36(8), pp.531-539
    Description: Variables predicting optimal timing for tracheostomy decannulation remain unknown. We aimed to determine whether classifying patients into two groups according to their indications for tracheostomy could identify variables associated with time to decannulation. A prospective, observational cohort study was carried out. Two medical–surgical ICUs. We included all patients tracheostomized during ICU stay, excluding patients with do-not-resuscitate orders, tracheostomies for long-term airway control, neuromuscular disease, or neurological damage. Patients were classified into two groups: patients tracheostomized due to prolonged weaning and/or prolonged mechanical ventilation (Group 1), and patients tracheostomized due to low level of consciousness or inability to manage secretions (Group 2). Patients were weaned and decannulated according to established protocols. We recorded the following variables: time to tracheostomy, forced vital capacity, peak flow, suctioning requirements, Glasgow Coma Score (GCS), characteristics of respiratory secretions, and swallowing function. Statistical analyses included Cox-proportional multivariate analysis with time to decannulation as the dependent variable. A total of 227 patients were tracheostomized in the ICUs; of these, 151 were finally included in the study. In the multivariate analysis, time to decannulation in Group 1 was associated with the male gender (HR 1.74 (1.04–2.89), = 0.03), age 〉 60 years (HR 0.58 (0.36–0.91), = 0.02), high suctioning frequency (HR 0.81 (0.67–0.97), = 0.02), low forced vital capacity (HR 0.48 (0.28–0.82), 〈 0.01), and low peak flow (HR 0.25 (0.14–0.46), 〈 0.01). In Group 2 time to decannulation was associated to GCS 〉13 (HR 2.73 (1.51–4.91), 〈 0.01), high suctioning frequency (HR 0.7 (0.54–0.91), 〈 0.01), and inadequate swallowing (HR 1.97 (1.11–3.52), = 0.02). Variables associated with longer time to decannulation in ICU-tracheostomized patients differ with the indications for tracheostomy. No se han podido desarrollar modelos predictores de tiempo de decanulación de pacientes traqueotomizados. El objetivo del estudio fue desarrollar variables asociadas al tiempo empleado en decanular a los pacientes, mediante la clasificación de los pacientes según la indicación de la traqueotomía (TRQ). Estudio de cohortes prospectivo observacional. Dos UCI médico-quirúrgicas. Se incluyeron todos los pacientes traqueotomizados en UCI, excluyendo aquellos con órdenes de no resucitación, TRQ crónicas, enfermos neuromusculares o con daño cerebral. Fueron clasificados en 2 grupos: traqueotomizados por ventilación mecánica o destete prolongado (Grupo 1) y pacientes traqueotomizados por disminución del nivel de conciencia o incapacidad para manejar las secreciones respiratorias (Grupo 2). Se empleó un protocolo de destete y decanulación. Se recogieron entre otras las siguientes variables: tiempo hasta decanulación, capacidad vital y flujo espiratorio máximo, necesidades de aspiración, Glasgow Coma Store (GCS), características de las secreciones respiratorias y función deglutoria. Se realizó un análisis multivariable proporcional de Cox, siendo el tiempo hasta decanulación la variable dependiente. De 227 pacientes traqueotomizados, 151 fueron incluidos en el estudio. El estudio multivariable seleccionó en el grupo 1 las variables: género masculino (HR 1,74 [1,04-2,89], p = 0,03), edad 〉60 años (HR 0,58 [0,36-0,91], p = 0,02), requerimiento de aspiraciones elevado (HR 0,81 [0,67-0,97], p = 0,02), capacidad vital forzada menor (HR 0,48 [0,28-0,82], p 〈 0,01), y flujo espiratorio pico bajo (HR 0,25 [0,14-0,46], p 〈 0,01); y en el grupo 2 con GCS 〉13 (HR 2,73 [1,51-4,91], p 〈 0,01), requerimiento de aspiraciones elevado (HR 0,7 [0,54-0,91], p 〈 0,01), y deglución inadecuada (HR 1,97 [1,11-3,52], p = 0,02). las variables asociadas con el tiempo hasta decanulación en pacientes críticos difieren según la indicación de la traqueotomía.
    Keywords: Mechanical Ventilation ; Weaning ; Tracheostomy ; Decannulation ; Outcome ; Ventilación Mecánica ; Destete Ventilatorio ; Traqueotomía ; Decanulacion ; Pronóstico ; Medicine
    ISSN: 2173-5727
    E-ISSN: 2173-5727
    Source: ScienceDirect Journals (Elsevier)
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  • 9
    Language: English
    In: IEEE Transactions on Education, August 2012, Vol.55(3), p.412
    Description: WIRIS quizzes are an online mathematics tool for educational purposes that upgrade Moodle quizzes and allow the development of personalized quizzes using random data and conditional instructions. WIRIS quizzes can be used in any mathematics or science degree; their complex operators allow it...
    Keywords: Foreign Countries ; Mathematics Tests ; Calculators ; Computer Assisted Testing ; Equipment ; Internet ; Integrated Learning Systems ; Electronic Learning ; Engineering Education ; Undergraduate Students ; Instructional Effectiveness ; Spain (Catalonia) ; Education ; Engineering
    ISSN: 0018-9359
    E-ISSN: 1557-9638
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  • 10
    Language: English
    In: Electric Power Systems Research, November 2017, Vol.152, pp.27-35
    Description: This paper studies the influence on the voltage estimation accuracy of a novel hysteresis effect model. The model is applied to six different battery technologies: Lead–acid AGM, Lead–acid gel, Nickel–cadmium, Nickel–metal hydride, Lithium-ion, Lithium-ion polymer. The proposed hysteresis electrical model estimates the variation of the parameters in a classical model when considering hysteresis effects. A general model is proposed and the characterization process is optimized so that it can be applied to all studied cells. The model is composed of three circuits: voltage–current circuit, Ah counting circuit and hysteresis electrical model circuit. All the parameters for all six technologies are calculated and compared. The model evaluation is carried out through 18 case studies. The results are compared in terms of increment of voltage estimation accuracy when considering hysteresis and influence of hysteresis on a certain technology. The model average voltage estimation error of all technologies is 0.48%. When hysteresis effect is included the average error reduces in 0.71%.
    Keywords: Lead–Acid ; Nickel–Cadmium ; Nickel–Metal Hydride ; Lithium Ion ; Battery Model ; Hysteresis ; Engineering
    ISSN: 0378-7796
    E-ISSN: 1873-2046
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