La percepción de la prensa sobre la inmigración surcoreana en Nuevo León antes y durante la pandemia por la COVID-19

Este artículo parte de una investigación más amplia sobre la estimación poblacional de los residentes surcoreanos en el Estado de Nuevo León, México. Este trabajo plantea, a manera de resumen, cómo el incremento de la comunidad surcoreana en Nuevo León generó una sobreexposición de esta ante los medios de comunicación, creando así una percepción mediática de una comunidad antes desconocida. Además, aborda la transición de esta nueva percepción mediática, antes enfocada a las áreas de lo social y cultural, y ahora enraizada en el discurso y estrategias del gobierno estatal neoleonés ante la crisis pandémica generada por el SARS-CoV-2 (COVID-19), y desde el discurso gubernamental inicial, vinculado a la corrupción y a los problemas legales que enmarcaron la llegada de las empresas surcoreanas a la entidad, hasta el renovado discurso de colaboración sanitaria impulsado por KIA Motors y respaldado por Corea del Sur

Altered microRNAs related to synaptic function as potential plasma biomarkers for Alzheimer's disease

Altres ajuts: This work was supported by grants from , Fundació La Marató TV3 (TV3-2014-3610), CIBERNED (CB06/05/0042 and PI2017/01) to JRA. DSW was supported by the Fundació La Marató TV3. JCS is a recipient of a Ph.D. Fellowship from the Ministerio de Ciencia, Innovación y Universidades. CF is a recipient of a Ph.D. Fellowship from the Department of Biochemistry and Molecular Biology of the Universitat Autònoma de Barcelona.Several evidences suggest that failure of synaptic function occurs at preclinical stages of Alzheimer's disease (AD) preceding neuronal loss and the classical AD pathological hallmarks. Nowadays, there is an urgent need to identify reliable biomarkers that could be obtained with non-invasive methods to improve AD diagnosis at early stages. Here, we have examined plasma levels of a group of miRNAs related to synaptic proteins in a cohort composed of cognitive healthy controls (HC), mild cognitive impairment (MCI) and AD subjects. Plasma and brain levels of miRNAs were analysed in two different cohorts including 38 HC, 26 MCI, 56 AD dementia patients and 27 frontotemporal dementia (FTD) patients. D'Agostino and Pearson and Shapiro-Wilk tests were used to evaluate data normality. miRNA levels between groups were compared using a two-sided nonparametric Mann-Whitney test and sensitivity and specificity was determined by receiver operating characteristic curve analysis. Significant upregulation of miR-92a-3p, miR-181c-5p and miR-210-3p was found in the plasma of both MCI and AD subjects. MCI patients that progress to AD showed higher plasma levels of these miRNAs. By contrast, no changes in miR-92a-3p, miR-181c-5p or miR-210-3p levels were observed in plasma obtained from a cohort of FTD. Our study shows that plasma miR-92a-3p, miR-181c-5p and miR-210-3p constitute a specific molecular signature potentially useful as a potential biomarker for AD. The online version of this article (10.1186/s13195-019-0501-4) contains supplementary material, which is available to authorized users

Efeito da suplementação dietética de Saccharomyces cerevisiae sobre parâmetros produtivos e utilização de nutrientes de codornas japonesas (Coturnix coturnix japonica) em crescimento

The aim of the study was to evaluate the effect of dietary supplementation of live yeast Saccharomyces cerevisiae (LSC) at levels of 0.15 to 0.45% (dry matter basis), on productive efficiency and nutrient utilization in growing Japanese quails. A total of 155 Japanese quails aged 15 days were assigned to 4 treatments: T1 or control diet with 0% LSC, and T2, T3 and T4, with 0.15, 0.30 and 0.45% LSC (dry matter base) (Saccharomyces cerevisiae with 1.4 x 109 CFU/mL). Each treatment had n=4 repetitions (cages), with 7 - 8 birds per cage. The productive variables body weight (g), daily weight gain (ADP, g/day), feed consumption (g/bird/day), feed efficiency, and viability (%) were determined. Results were analyzed with ANOVA. The inclusion of 0.45% LSC in the diet increased (P < 0.05) feed intake, improved bird survival, and the protein utilization rate, with no effect (P > 0.05) on weight, feed conversion, and ADP in growing quails.El presente trabajo de investigación tuvo como objetivo evaluar el efecto de la suplementación dietética de levadura viva Saccharomyces cerevisiae (LSC) a niveles de 0.15 a 0.45% (base seca), sobre la eficiencia productiva y la utilización de nutrientes en codornices japonesas en crecimiento. Un total de 155 codornices japonesas de 15 días de edad fueron asignadas a 4 tratamientos: T1 o dieta control con 0% de LSC, y T2, T3 y T4, con 0.15, 0.30 y 0.45 % de LSC (base materia seca) (Saccharomyces cerevisiae con 1.4 x 109 UFC/mL). Cada tratamiento tuvo n=4 repeticiones (jaulas), con 7 - 8 aves por jaula. Se determinaron las variables productivas peso de las aves (g), aumento de peso diario (ADP, g/día), consumo de alimento (g/ave/día), eficiencia alimenticia, y la viabilidad (%). Los resultados se analizaron con ANOVA. La inclusión de 0.45% LSC en la dieta incrementó (P < 0.05) el consumo de alimento, mejoró la supervivencia de las aves y la eficiencia de utilización de la proteína, sin tener efecto (P > 0.05) sobre el peso, conversión de alimento y ADP en las codornices en crecimiento.Resumo. O objetivo deste trabalho de pesquisa foi avaliar o efeito da suplementação dietética de levedura viva Saccharomyces cerevisiae (LSC) em níveis de 0,15 a 0,45% (base seca), na eficiência produtiva e utilização de nutrientes em codornas japonesas em crescimento. Um total de 155 codornas japonesas com 15 dias de idade foram distribuídas em 4 tratamentos: T1 (dieta controle) com 0% LSC, e T2, T3 e T4, com 0,15, 0,30 e 0,45 % LSC (base matéria seca) ( Saccharomyces cerevisiae com 1,4 x 109 UFC/mL). Cada tratamento teve n=4 réplicas (gaiolas), com 7 - 8 aves por gaiola. As variáveis ​​produtivas foram determinadas: peso da ave (g), ganho de peso diário (PIB, g/dia), consumo de ração (g/ave/dia), conversão alimentar e viabilidade (%). Os resultados foram analisados ​​com ANOVA. A inclusão de 0,45% LSC na dieta aumentou (P < 0,05) o consumo de ração, melhorou a sobrevivência das aves e a eficiência de utilização da proteína, sem efeito (P > 0,05) sobre o peso, conversão alimentar e PIB em codornas em crescimento

Forage and vegetal characterization of three native mexican grasses in Tulancingo de Bravo, Hidalgo

Objective: To carry out an agronomical assessment and a quantitative description of the yield components of switchgrass (Panicum virgatum), eastern gamagrass (Tripsacum dactyloides), and alkali sacaton (Sporobolus airoides) under rainfed conditions in Tulancingo, Hidalgo, Mexico. Design/Methodology/Approach: A completely randomized block design was used in 31-month-old pastures to determine forage production, morphological composition, seed yield, and weight of 1,000 caryopses. The plants were characterized in 7-month-old pastures, recording (per plant) the number of total and floral stems, as well as the basal twigs in alkali sacaton and switchgrass. Meanwhile, in the case of eastern gamagrass, the dome number and androecium sections were recorded. Results: The highest forage dry matter production was observed in switchgrass: 9,322 kg ha-1 (P < 0.05). Eastern gamagrass had a higher leaf ratio (1:3). The highest number of seeds was recorded in alkali sacaton: 211 kg ha-1, with 43% physical purity. After 7 months of sowing, a total of 250, 355, and 280 stems and 193, 150, and 87 floral stems were recorded in switchgrass, alkali sacaton, and eastern gamagrass, respectively. Study Limitations/Implications: Eastern gamagrass produces a low number of seeds; therefore, it must be propagated by plant material. In rainfed soils, grasses help to recover pasture areas, since rainfed agriculture poses a risk in many places as a result of poor rainfall distribution or early frosts. Findings/Conclusions: The three grasses studied are productive due to the amount of forage accumulated. Alkali sacaton produces more seeds

Maize stover in the relationship of maize-growing and cattle raising in the dry tropics of Chiapas, Mexico

An approximation study was conducted using a socio-agricultural approach to determine the current status of maize stover production and use in the Frailesca region of Chiapas. Field work conducted in 2012 consisted of semi-structured interviews to gather information from all stakeholders involved in the maize livestock farming relationship. Three classes of maize-livestock farmers by scale were identified in the region depending on the criteria of crop surface and maize yield. All three classes of farmers were found to be energy efficient, with balances above 9 Mcal produced per Mcal consumed. The primary form of using maize stover at all stages of cattle raising except fattening was direct grazing, due to low yields that make mechanical operations hardly feasible.An approximation study was conducted using a socio-agricultural approach to determine the current status of maize stover production and use in the Frailesca region of Chiapas. Field work conducted in 2012 consisted of semi-structured interviews to gather information from all stakeholders involved in the maizelivestock farming relationship. Three classes of maize-livestock farmers by scale were identified in the region depending on the criteria of crop surface and maize yield. All three classes of farmers were found to be energy efficient, with balances above 9 Mcal produced per Mcal consumed. The primary form of using maize stover at all stages of cattle raising except fattending was direct grazing, due to low yields that make mechanical operations hardly feasible

Ruling Frameworks and Fire Use‐Conflicts in Tropical Forests of Chiapas, Mexico: A Discourse Analysis

The use of fire within tropical forests to settle agriculture and livestock systems has long been causing a bottle-neck for governmental and environmental development agencies, especially in natural forested areas with local population. An international strategy followed since many years ago is the decree of special territories with vast forests as natural protected areas (NPA). In Mexico, environmental laws can run contrary to customs and practices of natural resource-dependent communities which still use fire to farm their lands as unique livelihood activity. The chapter examines two conflicting frameworks of resource management (forest and soil) and governance in a forest village’s efforts to comply with federal policies against fires in a NPA of Chiapas, Mexico. Forest and soil management is a key locus in California village, where governance structures come into conflict with hierarchical State power. Participatory workshops and semi-structured interviews were primary research instruments for data collection and discovery of community front and backstage. Ethnography and discourse analysis were used as main tools for the analysis of information. While the State leads the conservation efforts and limits cultural activities and local actions through coercive laws, the land use and resource-dependent communities defend their access rights, and they also determine how to individual or collectively manage fires in daily activities. Finding collective solutions with horizontal-dialogue strategies represent an important issue and a pending task for the development and preservation agencies focused on forested areas. Backstage dialogue is a tool for village self-preservation when livelihood strategies are at odds with protectionist conservation efforts

Biomass Accumulation and Carbon Storage in Pinus maximinoi, Quercus robur, Quercus rugosa, and Pinus patula from Village- Forests of Chiapas, Mexico

The Frailesca region (Chiapas, Mexico) presents a lack of forest studies and its environmental contribution. This chapter displays a first case study with preliminary research information regarding the identification of main forest trees and rural villages with best potential for biomass production and carbon storage management. Twenty two plots of 500 m2 were selected in 11 villages of the region, in order to identify the main and dominant forest trees species and then to estimate the biomass production and carbon storage in pine (Pinus maximinoi), oak (Quercus robur), holm oak (Quercus rugosa) and Mexican weeping pine (Pinus patula) species. This study shows that the largest accumulation of both biomass and carbon occurred in the pine forests and the lowest in the oak forests. Pine trees showed carbon storage of 516.75 Mg ha−1, followed by holm oaks, with 297.21 Mg ha−1; the species with the lowest value was oak, with 75.02 Mg ha−1. The forests of the 24 de Febrero villages had the highest potential for carbon storage. Deep studies are being conducted in relation to the aboveground biomass, carbon contents in trees stem, branches and leaves, and the relation to biomass dynamics and carbon stocks and other ecological aspects of village-forests

Recent Advances in Prodigiosin as a Bioactive Compound in Nanocomposite Applications

Bionanocomposites based on natural bioactive entities have gained importance due to their abundance; renewable and environmentally benign nature; and outstanding properties with applied perspective. Additionally, their formulation with biological molecules with antimicrobial, antioxidant, and anticancer activities has been produced nowadays. The present review details the state of the art and the importance of this pyrrolic compound produced by microorganisms, with interest towards Serratia marcescens, including production strategies at a laboratory level and scale-up to bioreactors. Promising results of its biological activity have been reported to date, and the advances and applications in bionanocomposites are the most recent strategy to potentiate and to obtain new carriers for the transport and controlled release of prodigiosin. Prodigiosin, a bioactive secondary metabolite, produced by Serratia marcescens, is an effective proapoptotic agent against bacterial and fungal strains as well as cancer cell lines. Furthermore, this molecule presents antioxidant activity, which makes it ideal for treating wounds and promoting the general improvement of the immune system. Likewise, some of the characteristics of prodigiosin, such as hydrophobicity, limit its use for medical and biotechnological applications; however, this can be overcome by using it as a component of a bionanocomposite. This review focuses on the chemistry and the structure of the bionanocomposites currently developed using biorenewable resources. Moreover, the work illuminates recent developments in pyrrole-based bionanocomposites, with special insight to its application in the medical area.This work was funded by CSIC-Tecnológico de Monterrey under i-Link+program (LINKB20030) for a project entitled “Contaminantes emergentes y prioritarios en las aguas reutilizadas en agricultura: riesgos y efectos en suelos, producción agrícola y entorno ambiental”.Peer reviewe

Evaluación de la capacidad funcional mediante prueba de marcha de 6 minutos en niños con asma

Los pacientes con asma muestran menor tolerancia al ejercicio. Objetivo: evaluar la capacidad funcional en niños con asma. ABSTRACT Asthma patients show lower exercise tolerance. Objective: Assessment of functional capacity in children with asthma