Effects of caffeic acid and bovine serum albumin in reducing the rate of development of rancidity in oil-in-water and water-in-oil emulsions

The antioxidant properties of caffeic acid and bovine serum albumin in oil-in-water and water-in-oil emulsions were studied. Caffeic acid (5 mmol/kg emulsion) showed good antioxidant properties in both 30% sunflower oil-in-water (OW) and 20% water-in-sunflower oil emulsions (WO), pH 5.4, during storage at 50 ºC. Although bovine serum albumin (BSA) (0.2%) had a slight antioxidant effect, the combination of caffeic acid and BSA showed a synergistic reduction in the rate of development of rancidity, with significant reductions in concentration of total volatiles, peroxide value (PV) and p-anisidine value (PA) for both emulsion types. The synergistic increase in stability of the OW and WO emulsions containing BSA and caffeic acid was 102.9 and 50.4 % respectively based on TOTOX values, which are calculated as 2PV + PA, with greater synergy calculated if based on formation of headspace volatiles, The OW emulsion was more susceptible to the development of headspace volatiles by oxidation than the WO emulsion, even though the degree of oxidation assessed by the TOTOX value was similar

Cinética de imbibición e isotermas de adsorción de humedad de la semilla de jamaica (Hibiscus sabdariffa L.)

La jamaica es un arbusto que se cultiva para comercializar el cáliz de sus flores, pero como subproducto se obtienen las semillas, que por su valor nutritivo y alto rendimiento representan un potencial económico considerable. El objetivo de este trabajo fue describir la cinética de imbibición y las isotermas de adsorción de humedad a 25, 35 y 45ºC en tres variedades cultivadas en México ("Criolla", "China" y "Sudán"). Los resultados mostraron que el proceso de imbibición describe una curva que se ajusta al modelo de Weibull, con coeficientes α de 12.99, 8.81 y 2.21 horas y β de 0.83, 1.70 y 0.72 para las variedades Criolla, China y Sudán, respectivamente. Los modelos de GAB, y de Chung-Pfost describieron adecuadamente las isotermas de adsorción. La humedad de la capa monomolecular (coeficiente a del modelo de GAB) resultó entre 3.97 y 5.71% b.s., lo cual representa una actividad de agua entre 0.1 y 0.30. Los calores isostéricos totales de adsorción obtenidos en el intervalo de humedades de equilibrio de 6 a 22% b.s., oscilaron entre 52.85 y 42.90 .90 kJmּol-1, 60.99 y 43.41 kJmּol-1 y 51.23 y 43.20 kJmּol-1para las variedades Criolla, China y Sudán, respectivamente. A humedades de equilibrio iguales o superiores a 12 % b.s., el calor isostérico fue similar a la entalpía de vaporización del agua, pero a humedades inferiores a 6% b.s., éste alcanzó los valores más elevados

Proyecto de inversión para la comercialización de una revista nutricional en la ciudad de Guayaquil para la empresa “revistas s.a.

La idea de desarrollar una revista informativa nutricional surge de la necesidad de concienciar a la población acerca de la mala nutrición y sus consecuencias para la salud de padres e hijos. Es de señalar que, previo a este planteamiento, se ha tomado en consideración los datos proporcionados por la compañía Mercanalis S.A., quien realizó un estudio en el año 2007 a los diferentes estratos sociales en los que demuestra que la mayoría de la población de escasos recursos no tiene idea de qué manera combinar los alimentos con el afán de nutrirse de manera equilibrada y sana para prevenir trastornos en su salud. Por esto, siendo esta propuesta dirigida a las clases media y pobre, primero se debe tomar en consideración que dicha población no cuenta con los recursos suficientes para la obtención de dicha revista, por eso la presente revista será de circulación gratuita, tal que se pueda crear conciencia de la importancia de la salud y nutrición en las familias. Es necesario identificar las firmas que de alguna manera se involucran con temas nutricionales o de salud como parte de su posicionamiento corporativo. De igual manera, se pueden identificar iniciativas del sector público orientadas a prevenir las enfermedades degenerativas. Otro grupo objetivo importante para el financiamiento de este proyecto es el de las Organizaciones No Gubernamentales enfocadas en el bienestar y la calidad de vida

Simulation of a solar assisted counterflow tunnel dehydrator

A widely used class of vegetable dehydration systems are the “tunnel-and-truck” dehydrators, where the prepared material lies over horizontal trays stored in trucks which move discontinuously in opposite direction of the air flow. This way the driest product is facing the inlet hot and dry air blowed to the system. When product of one truck is ready, is removed from the tunnel leaving space for advance the remaining truck one place forward. This way, a new truck full of wet product can be inserted at the end of the tunnel. The hermal energy required for the process can be supplied by several sources including gas, biomass, solar energy or a combination of them. Solar energy is for free but reaches the Earth with quite a low flux and a strongly fluctuating rate. This imposes the need of special designs and control strategies. This paper presents a study based on simulation models of the dehydrator and the solar thermal system. The dehydrator simulation model is tuned to match experimental data from a particular prototype based on fossil fuel. A solar system simulation model is then applied to the analysis of different design options.Universidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Efficacy of Eye Movement Desensitization Reprocessing (EMDR) in Improving Self-Regulation of In-House Filipino Clients with Substance-Use-Disorder

Abstract: Drug addiction is considered as a global epidemic which drastically affects millions of people worldwide, damaging an individual’s physiological, social, and psychological facets. One of the constructs that has been determined as an essential factor in the development of a variety of addictive behaviors is self-regulation. It plays an important role in predicting, maintaining, and treating addiction. In this study, the efficacy of Desensitization of Triggers and Urge Reprocessing (DeTUR), an Eye Movement Desensitization Reprocessing (EMDR) addiction protocol, in improving self-regulation was tested among fourteen (14) in-house clients of two drug treatment and rehabilitation centers using sequential explanatory mixed method research design wherein Self-regulation Inventory-Short Version (SRI-S) and individual interviews were employed. Results explicitly proved that self-regulation scores obtained significantly differed before, after, and even the delivery of delayed posttest using the EMDR as an intervention. The study confirmed that EMDR enhances the clients’ self-regulations (Overall SRI) and the sub-areas: positive actions, controllability, expressions of feelings and needs, assertiveness, and well-being seeking. Themes generated using thematic analysis further established a basis for the efficacy of EMDR.Keywords: drug addiction, self-regulation, Eye-movement Desensitization Reprocessing (EMDR), Desensitization of Triggers and Urge Reprocessing (DeTUR

Structural and numerical identifiability of thermal resistances in plate fin-and-tube heat exchangers using manufacturer catalog data

Plate fin-and-tube heat exchangers, commonly known as heating/cooling coils, are widely used in HVAC systems to transfer heat to or from air. A problem of practical interest in coil simulation is to identify the thermal resistances on the air and liquid sides using manufacturer catalog data. Manufacturers rarely provide detailed information (geometry and circuitry) of the coils they sell or install in factory-made equipment such as air handling units or fan-coils; they just report the performance of the coil at a few typical operating conditions. This paper examines whether it is mathematically possible to back-calculate the thermal resistances on the air and liquid sides using a set of performance data that is disturbed by noise (e.g. measurement errors) and consists of operating cases in which none of the two thermal resistances can be neglected. The first part of the paper discusses the structural identifiability problem, that is, the mathematical possibility of fitting Nusselt-type correlations for air and liquid, as well as a constant resistance for the wall. The second part of the paper discusses the possibility of calculating the numerical value of the parameters of the Nusselt correlations (constant or constant and exponent) using noisy data. The analysis is applied to a typical coil, which is simulated by means of a mathematical modelUniversidad de Málaga. Campus de Excelencia Internacional Andalucía Tech

Innovation systems and regional resilience: a network analysis

European regions face several social and economic challenges. To overcome these challenges, each region needs to identify priority domains that promote innovation dynamics and represent competitive advantages for development and regional resilience. The innovative dynamics of a region largely depends on existing actors and their connectivity, so that the resilience of a given innovation system can be analyzed through the study of innovation networks. This article studies the case of Algarve, a peripheral region in the south of Portugal, through the use of Social Network Analysis. The results facilitate the identification of thematic groups of priorities for smart specialization and potentialities for the system improvement and suggest that the public policies must make efforts to stimulate the cooperation for the innovation, avoiding an excessive concentration of resources and the prominence of specific actors.Las regiones europeas presentan diversos retos sociales y económicos. Para superar estos desafíos es necesario que cada región identifique dominios prioritarios sobre los que concretar las dinámicas de innovación y sus ventajas competitivas, en pos del desarrollo y la resiliencia regional. Las dinámicas innovadoras de una región dependen de los actores existentes y de su conectividad, por lo que la resiliencia de un determinado sistema de innovación puede ser analizada a través del estudio de las redes de innovación. Este artículo estudia el caso de Algarve, una región periférica en el sur de Portugal, por medio del Análisis de Redes Sociales. Los resultados identifican grupos temáticos de prioridades para la especialización inteligente y potencialidades para la mejora del sistema. Sugieren, además, que las políticas públicas deben hacer esfuerzos para estimular la cooperación para la innovación, evitando la concentración excesiva de recursos y el protagonismo de actores específicosinfo:eu-repo/semantics/publishedVersio