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Oxidative desulfurization of diesel fuel oil using supported Fenton catalysts and assisted with ultrasonic energy

Petroleum Science 2019年第5期16卷 1176-1184页

作者： Roberto Flores Arturo Rodas Raquel Gasperin Facultad de Ciencias químicas e Ingeniería Universidad Autónoma del Estado de MorelosAv.Universidad No.1001Col.Chamilpa62209 CuernavacaMorelosMexico gerencia de materiales y procesos químicos Instituto Nacional de Electricidad y Energías LimpiasCalle Reforma 113Col.Palmira62490 CuernavacaMorelosMexico

An ultrasound-assisted heterogeneous catalytic oxidation process was applied to eliminate sulfur from commercial diesel fuel *** studied variables were catalyst concentration,type of catalyst(homogeneous or heterogeneous),oxidizing agent concentration,and the application of ultrasound *** catalysts were prepared by impregnation of coal fly ash with an iron(Ⅱ)sulfate aqueous solution using ultrasound *** drying,the catalyst was calcined at 500℃for 4 *** oxidizing agent was hydrogen *** energy was applied with a frequency of 47 kHz and an intensity of 147 *** was employed for extracting the oxidized compounds from the hydrocarbon *** fly ash and ethanol were used with the purpose of applying low-cost raw materials in chemical *** was found that under the studied conditions,increasing oxidizing agent concentration and the application of ultrasound energy can enhance the sulfur removal from commercial diesel fuel *** concentration did not play a significant role in the *** results were obtained using homogeneous or heterogeneous catalyst,which is important since the heterogeneous catalyst could be recovered,reactivated,and used in many cycles.

关键词： Oxidative desulfurization Diesel Ultrasound energy Supported catalyst Low-cost raw materials

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Efficacy of a Strategy for Implementing Guidelines for the Control of Cardiovascular Risk in Primary Healthcare

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World Journal of Cardiovascular Diseases 2020年第3期10卷 117-130页

作者： Maria Jesús Fernández-Luque Luis María Sánchez-Gómez Vicente Pastor y Aldeguer Carmen Suárez-Fernández Belén Sierra-García Soledad Mayayo-Vicente Marta Ruiz-López ángela Gallego-Arenas Rosa Sánchez Alcalde Pilar Loeches-Belinchón Javier López-González Francisco Rodríguez-Salvanés Blanca Novella-Arribas Dirección General de Investigación Docencia y Documentación Consejería de Sanidad Comunidad de Madrid Madrid Spain Instituto de Investigación Sanitaria del Hospital Universitario de La Princesa (IP) Madrid Spain Universidad Autónoma de Madrid Facultad de Medicina Madrid Spain Hospital Universitario de la Princesa SERMAS Consejería de Sanidad Comunidad de Madrid Madrid Spain gerencia Asistencial de Atención Primaria D.G. de Coordinación de Asistencia Sanitaria SERMAS Consejería de Sanidad Comunidad de Madrid Madrid Spain Unidad de Evaluación de Tecnologías Sanitarias de Madrid Procesos Integrados de Salud Consejería de Sanidad Madrid Spain

Background: A number of strategies exist for the implementation of clinical practice guides (CPGs). Aim: To assess the efficacy of implementing a cardiovascular risk CPG based on an educational method involving opinion leaders, and the habitual method of dissemination among primary healthcare teams. design and Setting: Controlled, blinded, community intervention trial randomised by clusters. Methods: 21 primary healthcare centres were randomly assigned to either the intervention arm (n = 11) or the control arm (n = 10). The study subjects were patients aged ≥45 years assigned to the centres. The overall impact of the intervention was measured as the difference between the increase in the proportion of patients whose medical records showed the recording of all the variables necessary to calculate cardiovascular risk in both arms. Analyses were performed with Generalized Lineal Model on an intention-to-treat basis. Results: 917 subjects were included at the beginning of the trial (437 in the intervention arm and 480 in the control arm). 826 subjects were included in the final evaluation (436 in the intervention group and 390 in the control arm). At the end of the trial, the recording of the variables necessary for the calculation of the cardiovascular risk in the intervention group had increased more than in the control group (difference between increases 7.49% (95% CI 4.62 - 10.35)) after adjusting for confounding variables. Conclusions: Compared to the habitual method of dissemination, the implementation of this CPG using an educational method involving opinion leaders, improved the recording of the variables needed to calculate patients’ cardiovascular risk.

关键词： Randomized Controlled Trial Cluster Analysis Clinical Practice Guidelines Primary Healthcare Risk Factors Cardiovascular Diseases

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