Adición de un probiótico de Lactobacillus plantarum microencapsulado en el alimento para pollos

Introducción: En producción avícola el uso de antibióticos promotores del crecimiento es limitado, debido al incremento de resistencia bacteriana. Una alternativa evalúa los probióticos microencapsulados y su efecto en la salud intestinal. Objetivo: Determinar el efecto de Lactobacillus plantarum microencapsulado sobre parámetros intestinales e inmunológicos en pollos de engorde. Materiales y métodos: A 240 pollos Ross-308-AP de un día de nacidos se suministró alimento con o sin adición de probiótico bajo el siguiente modelo: sin probiótico-(T0), con probiótico comercial-(T1), con Lactobacillus plantarum microencapsulado-(T2) y sin microencapsular-(T3). Lactobacillus plantarum ATCC-8014 se microencapsuló mediante secado por aspersión, determinando su viabilidad en (%). Se evaluaron parámetros intestinales, morfo-histopatológicos e inmunológicos por Azul de Alcian, microscopia de barrido e inmunohistoquímica y la abundancia microbial por UFC/mL. Resultados: El microencapsulado confirió una viabilidad in vivo de Lactobacillus plantarum del 88,1%. El tratamiento T2 mejoró los parámetros inmunológicos y confirió beneficios intestinales con una abundancia de bacterias benéficas (Lactobacillus) de (9,13x105-UFC/mL), significativamente mayor a la encontrada en los tratamientos T1 (8,91x105) y  T3 (8,23x105) y el control T0 (9,18x104), (p<0,05). Conclusiones: La adición de Lactobacillus plantarum microencapsulado en alimento para pollos mejora parámetros inmunológicos y confiere mayor abundancia de bacterias benéficas presentes en la microbiota intestinal

Estudio descriptivo sobre libranza de guardias de Médicos Residentes de Madrid: Efecto de la huelga de 2020 en el cumplimiento de los descansos obligatorios

Background: This study aims at describing the absence of mandatory rest periods after a 24h on call shift in resident physicians in the region of Madrid. It also tries to elucidate the effect which the 2020 resident physician’s strike has had in this phenomenon. Materials and methods: A descriptive observational cross-sectional study has been carried out through an anonymous survey adapted from the available literature. Results: Before the resident’s strike up to 27,2% of the residents surveyed could not enjoy mandatory resting periods after a 24 hour on-call shift. The mandatory weekly rest of at least 36 hours was not done in up to 87% of the cases. After the residents' strike, these figures have been reduced to 19.8% and 34.5% respectively, with statistical significance comparing with previous percentages (p &lt;0.05). The average number of 24 hours on call shifts residents had to work per month was 5, which exceeds the maximum weekly hours allowed by law. Conclusions: The findings reveal a violation of resident physician labor rights in relation to the mandatory days-off after 24-hour on call shifts and weekly breaks. The resident physician’s strike has reduced the incidence of the phenomenon, but it remains a relevant threat to resident physician’s health and patient safety.Antecedentes: Este estudio tiene como objetivo describir el grado de cumplimiento de los descansos obligatorios tras las jornadas de trabajo de 24 horas (guardias) en el colectivo de médicos residentes en la Comunidad de Madrid y el efecto que la huelga de residentes de 2020 ha tenido en el cumplimiento de dichos descansos. Métodos: Se ha diseñado un estudio descriptivo observacional transversal a través de una encuesta online anónima adaptada de la bibliografía existente. Resultados: Antes de la huelga de residentes el 27,2% de los encuestados no realizaban los descansos obligatorios después de las guardias. El descanso semanal obligatorio de al menos 36 horas no se respetaba hasta en el 87% de los casos. Después de la huelga de residentes, estos porcentajes se han reducido a un 19,8% y un 34,5% respectivamente, con significación estadística comparándose con los porcentajes previos (p&lt;0,05). La media de guardias realizadas en la muestra era de 5 al mes, lo que supera el máximo legal de horas semanales.&nbsp; Conclusiones: Se constata la vulneración de los derechos laborales de los residentes en un importante porcentaje de los residentes en lo relativo a los descansos obligatorios post-guardia y descansos semanales. La huelga de residentes ha reducido la incidencia del fenómeno, pero sigue siendo un problema relevante para la salud de los residentes y la seguridad del paciente.&nbsp

Evaluación del comportamiento del perfil de lípidos postingesta de una carga lipídica estandarizada en jóvenes sanos, Universidad Nacional de Colombia, 2000

Antecedentes: Se ha demostrado ampliamente la asociación de niveles elevados de colesterol y triglicéridos, además de niveles bajos de colesterol HDL con riesgo elevado de aterosclerosis y sus consecuencias. La elevación exagerada de los triglicéridos posterior a la ingesta de alimentos es una alteración que ha despertado gran interés en los últimos años, sin embargo no se ha trazado un límite de normalidad para su comportamiento de acuerdo a lo observado en individuos sanos. Métodos: Analizamos la variación del colesterol HDL y los triglicéridos en una muestra de 50 individuos sanos (25 hombres y 25 mujeres), después de la ingesta de un desayuno de prueba, con el fin de trazar un patrón de comportamiento postprandial de éstos parámetros, en especial la hora en que el valor de triglicéridos  presenta su máxima elevación en población normal y el valor límite que permita discriminar entre individuos sanos e individuos con hiperlipemia postprandial. Resultados: Se encontró una gran variabilidad en el comportamiento postprandial de los triglicéridos, especialmente en hombres. El mayor porcentaje de individuos presentó la máxima  elevación de la cifra de triglicéridos en la tercera hora postprandial. Sin embargo las diferencias en el comportamiento entre hombres y  mujeres no resultaron estadísticamente significativas. El nivel de colesterol de HDL sólo tuvo ligeras variaciones a lo largo del estudio, que no resultaron estadísticamente significativas No fue posible establecer correlaciones entre las mediciones de colesterol HDL y triglicéridos y las variables secundarias, existiendo para todas niveles de correlación muy bajos. Los valores de triglicéridos en las mediciones de la segunda, tercera y cuarta hora presentaron una alta correlación. Conclusiones: Nuestros resultados señalan un comportamiento similar en la lipemia postprandial entre hombres y mujeres. La elevación máxima de los niveles de triglicéridos entre la segunda y cuarta hora en el 81,1% de los pacientes nos hace suponer que un valor obtenido en ese intervalo de tiempo es representativo del comportamiento postprandial de los lípidos para una parte importante de la población. El comportamiento del colesterol de IIDL no parece presentar variaciones significativas durante el periodo postprandial, aunque presenta una ligera disminución del 5% en la tercera hora, coincidente con la elevación máxima de triglilcéridos. Para poder emplear estos hallazgos con el fin de trazar valores normales que permitan discriminar un comportamiento normal de uno  patológico, serán necesarios estudios futuros en población francamente enferma, comparando sus hallazgos con los aquí mostrados.Backgrounds it has been shown that high levels of cholesterol and triglycerides besides low levels of HDL cholesterol are associated with higher risk of atherosclerosis and its consequences. The exaggerated elevation in triglycerides after a meal is an alteration that has raised concern in the last years. However, there isn't still a normality threshold for its behavior according to the findings in normal subjects Methods: We analyzed the variation in HDL cholesterol and triglycerides in a sample of 50 healthy individuals (25 men and 25 women), after intake of a test breakfast, regarding for the postprandial pattern for these parameters, specially the hour in which the maximum value of triglycerides was shown in the normal population and the value that could discriminate between healthy individuals and those with postprandial hiperlipemia. Results: We found a great variability in the postprandial behavior of triglycerides among individuals, specially in men. The greater percentage of individuals showed the maximum of triglycerides in the third postprandial hour. However the differences between men and women were not statistically significant The HDL cholesterol had only slight variations along the study, and they were not statistically significant. It wasn't possible to establish correlations among the HDL and triglyceride levels and the secondary measures relative to health condition, existing very low correlation levels. The trygliceride value in the second, third and fourth hour presented a high correlation. Conclusions: Our results show a similar behavior in postprandiallipemia in men and women. The greater elevation of triglyceride levels between second and fourth hour in 81,1 % of the patients allows us to suppose that a value obtained in this time interval is representative of postprandiallipids for an important part of the population. The behavior of HDL cholesterol seem not to show significative variations along the postprandial period, although it shows a small decline of 5% in the third hour, coincidentally with the greater elevation of triglycerides. If we want to use these findings to draw normal values that allow to discrimina te a normal pattern from a pathologic one, further studies will be needed gathering clearly iII populations and comparing their findings with those shown here

Mobile Sensing Systems

[EN] Rich-sensor smart phones have made possible the recent birth of the mobile sensing research area as part of ubiquitous sensing which integrates other areas such as wireless sensor networks and web sensing. There are several types of mobile sensing: individual, participatory, opportunistic, crowd, social, etc. The object of sensing can be people-centered or environment-centered. The sensing domain can be home, urban, vehicular Currently there are barriers that limit the social acceptance of mobile sensing systems. Examples of social barriers are privacy concerns, restrictive laws in some countries and the absence of economic incentives that might encourage people to participate in a sensing campaign. Several technical barriers are phone energy savings and the variety of sensors and software for their management. Some existing surveys partially tackle the topic of mobile sensing systems. Published papers theoretically or partially solve the above barriers. We complete the above surveys with new works, review the barriers of mobile sensing systems and propose some ideas for efficiently implementing sensing, fusion, learning, security, privacy and energy saving for any type of mobile sensing system, and propose several realistic research challenges. The main objective is to reduce the learning curve in mobile sensing systems where the complexity is very high.This work has been partially supported by the "Ministerio de Ciencia e Innovacion", through the "Plan Nacional de I+D+i 2008-2011" in the "Subprograma de Proyectos de Investigacion Fundamental", project TEC2011-27516, and by the Polytechnic University of Valencia, through the PAID-05-12 multidisciplinary projects.Macias Lopez, EM.; Suarez Sarmiento, A.; Lloret, J. (2013). Mobile Sensing Systems. Sensors. 13(12):17292-17321. https://doi.org/10.3390/s131217292S1729217321131

Elevation and latitude drives structure and tree species composition in Andean forests: Results from a large-scale plot network

Our knowledge about the structure and function of Andean forests at regional scales remains limited. Current initiatives to study forests over continental or global scales still have important geographical gaps, particularly in regions such as the tropical and subtropical Andes. In this study, we assessed patterns of structure and tree species diversity along ~ 4000 km of latitude and ~ 4000 m of elevation range in Andean forests. We used the Andean Forest Network (Red de Bosques Andinos, https://redbosques.condesan.org/) database which, at present, includes 491 forest plots (totaling 156.3 ha, ranging from 0.01 to 6 ha) representing a total of 86,964 identified tree stems ≥ 10 cm diameter at breast height belonging to 2341 identified species, 584 genera and 133 botanical families. Tree stem density and basal area increases with elevation while species richness decreases. Stem density and species richness both decrease with latitude. Subtropical forests have distinct tree species composition compared to those in the tropical region. In addition, floristic similarity of subtropical plots is between 13 to 16% while similarity between tropical forest plots is between 3% to 9%. Overall, plots ~ 0.5-ha or larger may be preferred for describing patterns at regional scales in order to avoid plot size effects. We highlight the need to promote collaboration and capacity building among researchers in the Andean region (i.e., South-South cooperation) in order to generate and synthesize information at regional scale.Fil: Malizia, Agustina. Universidad Nacional de Tucumán. Instituto de Ecología Regional. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Ecología Regional; ArgentinaFil: Blundo, Cecilia Mabel. Universidad Nacional de Tucumán. Instituto de Ecología Regional. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Ecología Regional; ArgentinaFil: Carilla, Julieta. Universidad Nacional de Tucumán. Instituto de Ecología Regional. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Ecología Regional; ArgentinaFil: Osinaga Acosta, Oriana. Universidad Nacional de Tucumán. Instituto de Ecología Regional. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Ecología Regional; ArgentinaFil: Cuesta, Francisco. Universidad de Las Américas; Ecuador. Consorcio para el Desarrollo Sostenible de la Ecorregión Andina; EcuadorFil: Duque, Alvaro. Universidad Nacional de Colombia. Sede Medellín; ColombiaFil: Aguirre, Nikolay. Universidad Nacional de Loja. Centro de Investigaciones Tropicales del Ambiente y la Biodiversidad; EcuadorFil: Aguirre, Zhofre. Universidad Nacional de Loja. Centro de Investigaciones Tropicales del Ambiente y la Biodiversidad; EcuadorFil: Ataroff, Michele. Universidad de Los Andes; VenezuelaFil: Baez, Selene. Escuela Politécnica Nacional; EcuadorFil: Calderón Loor, Marco. Universidad de Las Américas; Ecuador. Deakin University; AustraliaFil: Cayola, Leslie. Herbario Nacional de Bolivia; Bolivia. Missouri Botanical Garden; Estados UnidosFil: Cayuela, Luis. Universidad Rey Juan Carlos; EspañaFil: Ceballos, Sergio Javier. Universidad Nacional de Tucumán. Instituto de Ecología Regional. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Ecología Regional; ArgentinaFil: Cedillo, Hugo. Universidad de Cuenca; EcuadorFil: Farfán Ríos, William. Universidad Nacional de San Antonio Abad del Cusco. Herbario Vargas; PerúFil: Feeley, Kenneth J.. University of Miami; Estados UnidosFil: Fuentes, Alfredo Fernando. Herbario Nacional de Bolivia; Bolivia. Missouri Botanical Garden; Estados UnidosFil: Gámez Álvarez, Luis E.. Universidad de Los Andes; VenezuelaFil: Grau, Hector Ricardo. Universidad Nacional de Tucumán. Instituto de Ecología Regional. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Ecología Regional; ArgentinaFil: Homeier, Juergen. Universität Göttingen; AlemaniaFil: Jadan, Oswaldo. Universidad de Cuenca; EcuadorFil: Llambi, Luis Daniel. Escuela Politécnica Nacional; EcuadorFil: Loza Rivera, María Isabel. University of Missouri; Estados Unidos. Herbario Nacional de Bolivia; Bolivia. Missouri Botanical Garden; Estados UnidosFil: Macía, Manuel J.. Universidad Autónoma de Madrid; EspañaFil: Malhi, Yadvinder. University of Oxford; Reino UnidoFil: Malizia, Lucio Ricardo. Universidad Nacional de Jujuy. Facultad de Ciencias Agrarias; ArgentinaFil: Peralvo, Manuel. Consorcio para el Desarrollo Sostenible de la Ecorregión Andina; EcuadorFil: Pinto, Esteban. Consorcio para el Desarrollo Sostenible de la Ecorregión Andina; EcuadorFil: Tello, Sebastián. Missouri Botanical Garden; Estados UnidosFil: Silman, Miles. Center for Energy, Environment and Sustainability; Estados UnidosFil: Young, Kenneth R.. University of Texas at Austin; Estados Unido

Supply and Demand Analysis of Water Resources. Case Study: Irrigation Water Demand in a Semi-Arid Zone in Mexico

To sustainably use water resources, it is important to quantify water availability in a certain region. Due to climate change, population increase, and economic development, water demand increases continuously. Consequently, the difference between supply and demand of water becomes a significant issue, especially in arid and semi-arid regions. In this research, the Soil and Water Assessment Tool (SWAT) model has been applied to the Guadalupe river basin, to assess supply and demand analysis of water resources in this area, specifically for the irrigation of agricultural crops and municipal uses. From the land use, soil type, and terrain slope maps, 763 Hydrostatic Release Units (HRU) were estimated, distributed in the diverse relief types making up the basin, featured by mountains, hills, plateaus, plains, and valleys. For the crop area, 159 HRU were found with the three slope classification types, where 57 HRU represent 91% of the cultivated area on slopes, from 0 to 15%, located in the Ojos Negros and Guadalupe Valleys. The Soil Conservation Service method (SCS) was used to estimate the average monthly runoff and soil moisture content. As a result, water resource parameters related to the supply were determined with this, e.g., runoff, aquifer recharge, flow, infiltration, and others. Crop coefficient values (Kc) were used to determine crop evapotranspiration (ETc), to estimate the water demand of these for each month, using the multi-year monthly average reference evapotranspiration (ETo) calculated with the SWAT model. Overall good performance was obtained considering average monthly discharges data from the Agua Caliente gauging station. The model was calibrated, modifying the parameters chosen according to sensitivity analysis: SCS curve number, base-flow factor, ground-flow delay, and the threshold for return-flow occurrence. The Soil and Water Assessment Tool&ndash;Calibration and Uncertainty Programs SWAT-CUP has different goodness-of-fit indicators for the model e.g., determination coefficient (R2), standard deviation of the measured data (RSR), Nash&ndash;Sutcliffe coefficient of efficiency (NSE), and others. Multiple iterations were performed, resulting in a ratio between the root mean square error and the standard deviation of the measured data (RSR) of 0.61, a coefficient of determination (R2) of 0.70, and a Nash&ndash;Sutcliffe efficiency coefficient (NSE) of 0.63. A supply&ndash;demand analysis of the volume generated by the runoff from the basin was performed using the method of estimating useful volume for a reservoir. It is observed in these results that only positive deviations were obtained, implying that runoff in this basin is not enough to meet monthly demand. Finally, the need to establish actions to ensure water management efficiency is highlighted, both for irrigation of agricultural crops and for supply to the region population

Santa Ana Winds: Fractal-Based Analysis in a Semi-Arid Zone of Northern Mexico

A fractal analysis based on the time series of precipitation, temperature, pressure, relative humidity, and wind speed was performed for 16 weather stations located in the hydrographic basin of the Guadalupe River in Baja California, Mexico. Days on which the phenomenon known as Santa Ana winds occurs were identified based on the corresponding criteria of wind speed (≥4.5 m/s) and wind direction (between 0° and 90°). Subsequently, the time series was formed with data representing the days on which this phenomenon occurs in each of the analyzed weather stations. A time series was additionally formed from the days in which the Santa Ana winds condition does not occur. Hurst exponents and fractal dimension were estimated applying the rescaled range method to characterize the established time series in terms of characteristics of persistence, anti-persistence, or randomness along with the calculation of the climate predictability Index. This enabled the behavior and correlation analysis of the meteorological variables associated with Santa Ana winds occurrence. Finally, this type of research study is instrumental in understanding the regional dynamics of the climate in the basin, and allows us to establish a basis for developing models that can forecast the days of occurrence of the Santa Ana winds, in such a way that actions or measures can be taken to mitigate the negative consequences generated when said phenomenon occurs, such as fires and droughts

Santa Ana Winds: Fractal-Based Analysis in a Semi-Arid Zone of Northern Mexico

A fractal analysis based on the time series of precipitation, temperature, pressure, relative humidity, and wind speed was performed for 16 weather stations located in the hydrographic basin of the Guadalupe River in Baja California, Mexico. Days on which the phenomenon known as Santa Ana winds occurs were identified based on the corresponding criteria of wind speed (&ge;4.5 m/s) and wind direction (between 0&deg; and 90&deg;). Subsequently, the time series was formed with data representing the days on which this phenomenon occurs in each of the analyzed weather stations. A time series was additionally formed from the days in which the Santa Ana winds condition does not occur. Hurst exponents and fractal dimension were estimated applying the rescaled range method to characterize the established time series in terms of characteristics of persistence, anti-persistence, or randomness along with the calculation of the climate predictability Index. This enabled the behavior and correlation analysis of the meteorological variables associated with Santa Ana winds occurrence. Finally, this type of research study is instrumental in understanding the regional dynamics of the climate in the basin, and allows us to establish a basis for developing models that can forecast the days of occurrence of the Santa Ana winds, in such a way that actions or measures can be taken to mitigate the negative consequences generated when said phenomenon occurs, such as fires and droughts