Las metáforas de la influenza humana A (H1N1) en México: el escenario nacional al descubierto. Una aproximación a través de la prensa mexicana

Este artículo examina las metáforas emergentes hacerca de la influenza humana A (H1N1) en México, en dos periódicos con diferente ideología, durante la principal fase de la contingencia en 2009, para comprender el el signifiaco d ela epidemia inmersa las circunstancias nacionales actuales en sus diferentes escenarios: social, económico, político y de creencias

Optimization of the ellagic acid synthesis process at the bioreactor level using non-conventional yeasts

Ellagic acid (EA) is a phenolic biomolecule. For its biosynthesis, a source of ellagitannins is required, such as strawberries and yeasts, as precursors of the tannase and β-glucosidase enzymes responsible for hydrolysis of ellagitannins. Two experimental mixture designs were applied., varying the yeast concentration and the number of ellagitannins in the culture medium, evaluating the enzymatic activity and ellagic acid biosynthesis. Aiming to find the optimal compositions of the non-conventional yeasts assessed in the research to biosynthesize ellagic acid feasibly and efficiently using a response surface performing the statistical analysis in the StatGraphics® program for obtaining a higher yield and optimizing the ellagic acid synthesis process, the results indicate that the strains Candida parapsilosis ITM LB33 and Debaryomyces hansenii ISA 1510 have a positive effect on the synthesis of ellagic acid, since as its concentration increases in the mixture the concentration of ellagic acid in the medium also increases; on the other hand, the addition of Candida utilis ITM LB02 causes a negative effect, resulting in the compositions of 0.516876, 0.483124 and 2.58687E-9 respectively, for a treatment under the same conditions, an optimal value of ellagic acid production would be obtained. With an approximate value of 7.33036 mg/mL

Como evaluar las seis gestiones del talento en la administración del recurso humano en el CU UAEM Temascaltepec, extensión académica Tejupilco

Este proyecto tiene como fin evaluar la gestión del talento en la administración del recurso humano en el C. U. UAEM Temascaltepec, Extensión Académica Tejupilco, esto se logró aplicando un instrumento de autoevaluación, un test de formas de administrar al personal, un cuestionario que abarca las seis fases de gestión de recursos humanos según Liquidano (2005) y uno donde se da la opinión sobre el desempeño organizacional, donde después teniendo los resultados, se emite una propuesta al Centro para que nos ayude a mejorar la productividad, de acuerdo a las siguientes fases: de gestión, de recursos humanos, administrativa, de desarrollo, estratégica, de gestión por competencias y de gestión del conocimiento, donde como resultado final se tiene; fase estratégica con 93.3%, en seguida la fase de desarrollo con 86.7%, después las fases administrativa y del conocimiento con un 80%, y por ultimo las fases de gestión y fase por competencias con un 73.3%, así también se concluye diciendo que toda institución necesita evaluación, motivación y capacitar para lograr sus objetivos establecidos. Palabras claves: gestión del talento, administración, recursos humanos

Depression Episodes Detection in Unipolar and Bipolar Patients: A Methodology with Feature Extraction and Feature Selection with Genetic Algorithms Using Activity Motion Signal …

Depression is a mental disorder which typically includes recurrent sadness and loss of interest in the enjoyment of the positive aspects of life, and in severe cases fatigue, causing inability to perform daily activities, leading to a progressive loss of quality of life. Monitoring depression (unipolar and bipolar patients) stats relays on traditional method reports from patients; however, bias is commonly present, given the patients’ interpretation of the experiences. Nevertheless, to overcome this problem, Ecological Momentary Assessment (EMA) reports have been proposed and widely used. These reports includes data of the behaviour, feelings, and other type of activities recorded almost in real time using different types of portable devices, which nowadays include smartphones and other wearables such as smartwatches. In this study is proposed a methodology to detect depressive patients with the motion data generated by patient activity, recorded with a smartband, obtained from the “Depresjon” database. Using this signal as information source, a feature extraction approach of statistical features, in time and spectral evolution of the signal, is done. Subsequently, a clever feature selection with a genetic algorithm approach is done to reduce the amount of information required to give a fast noninvasive diagnostic. Results show that the feature extraction approach can achieve a value of 0.734 of area under the curve (AUC), and after applying feature selection approach, a model comprised by two features from the motion signal can achieve a 0.647 AUC. These results allow us to conclude that using the activity signal from a smartband, it is possibl

Elementos traza introducidos con aguas residuales a suelos agrícolas se acumulan en las fracciones estables - Trace elements added to agricultural soils with wastewater are accumulated in stable fractions

El objetivo de este trabajo fue analizar la distribución de los elementos traza (ET) en las fracciones del suelo, en función de los años de riego y su relación con la biodisponibilidad para maíz en el distrito de riego 003, de Tula, Hidalgo. Se muestrearon cuatros zonas con 27, 35, 52 y 102 años de riego, con agua residual, cultivadas con maíz. También se recolectó material vegetal en tres parcelas por cada zona. Se cuantificaron los elementos traza totales, extractables, en la fracciones del suelo y en el material vegetal. La concentración de cadmio total fue mayor a las que se consideran normales en el suelo. Los elementos traza se encuentran en mayor porcentaje en los carbonatos (8% - 31%) y la fracción residual (21% - 72%), con excepción del cobre, que además se asocia con la fracción orgánica (33% - 41%). En tejido vegetal se encontraron concentraciones de zinc (2 – 14 mg kg-1), níquel (0.58 – 1.1 mg kg-1) y plomo (27 – 33 mg kg-1), más altas de las normales, lo que se relacionó al factor de bioconcentración. El manejo del suelo y la concentración de elementos traza determina su biodisponibilidad en suelos áridos

Leaf Epiphytic Bacteria of Plants Colonizing Mine Residues: Possible Exploitation for Remediation of Air Pollutants

Plant surfaces are known as an important sink for various air pollutants, including particulate matter and its associated potentially toxic elements (PTE). Moreover, leaves surface or phylloplane is a habitat that harbors diverse bacterial communities (epiphytic). However, little is known about their possible functions during phytoremediation of air pollutants like PTE. The study of leaf epiphytic bacteria of plants colonizing mine residues (MR) containing PTE is thus a key to understand and exploit plant–epiphytic bacteria interactions for air phytoremediation purposes. In this research, we aimed (i) to characterize the functions of epiphytic bacteria isolated from the phylloplane of Brickellia veronicifolia, Flaveria trinervia, Gnaphalium sp., and Allioniachoisyi growing spontaneously on multi-PTE contaminated MR and (ii) to compare these against the same plant species in a non-polluted control site (NC). Concentrations (mg kg-1) of PTE on MR leaf surfaces of A. choisyi reached up to 232 for Pb, 13 for Cd, 2,728 for As, 52 for Sb, 123 for Cu in F. trinervia, and 269 for Zn in Gnaphalium sp. In the four plant species, the amount of colony-forming units per cm2 was superior in MR leaves than in NC ones, being A. choisyi the plant species with the highest value. Moreover, the proportion of isolates tolerant to PTE (Zn, Cu, Cd, and Sb), UV light, and drought was higher in MR leaves than in those in NC. Strain BA15, isolated from MR B. veronicifolia, tolerated 150 mg Zn L-1, 30 mg Sb L-1, 25 mg Cu L-1; 80 mg Pb L-1, and was able to grow after 12 h of continuous exposition to UV light and 8 weeks of drought. Plant growth promotion related traits [N fixation, indole acetic acid (IAA) production, and phosphate solubilization] of bacterial isolates varied among plant species isolates and between MR and NC sampling condition. The studied epiphytic isolates possess functions interesting for phytoremediation of air pollutants. The results of this research may contribute to the development of novel and more efficient inoculants for microbe-assisted phytoremediation applied to improve air quality in areas exposed to the dispersion of metal mine tailings

Adsorptive Removal of Acid Blue 80 Dye from Aqueous Solutions by Cu-TiO 2

The adsorption performance of a Cu-TiO2 composite for removing acid blue 80 (AB80) dye from aqueous solutions was investigated in terms of kinetics, equilibrium, and thermodynamics. The effect of operating variables, such as solution pH, initial dye concentration, contact time, and temperature, on AB80 adsorption was studied in batch experiments. AB80 adsorption increased with increasing contact time, initial dye concentration, and temperature and with decreasing solution pH. Modeling of adsorption kinetics showed good agreement of experimental data with the pseudo-second-order kinetics model. The experimental equilibrium data for AB80 adsorption were evaluated for compliance with different two-parameter, three-parameter, and four-parameter isotherm models. The Langmuir isotherm model best described the AB80 adsorption equilibrium data. The thermodynamic data revealed that the AB80 adsorption process was endothermic and nonspontaneous. Kinetics, equilibrium, and thermodynamic results indicate that Cu-TiO2 adsorbs AB80 by a chemical sorption reaction