104 research outputs found
Diagnóstico técnico del sistema de seguridad e higiene industrial y sus efectos en la calidad del producto en proceso en la Empresa maquiladora de prendas de vestir TEXNICA S. A. durante Marzo-Mayo 2006
Las zonas francas surgen por las diferentes necesidades de transportación presentadas en el desarrollo del comercio internacional. Estos grandes centros de exportación dan respuesta a una problemática, facilitando el comercio entre naciones.
En Nicaragua, las normas de seguridad están bajo el control y la vigilancia del MITRAB. Dentro de dicha secretaría, existe la Dirección General de Higiene y Seguridad Industrial, la cual tiene la facultad para realizar visitas de inspección y toda clase de investigaciones para análisis y estudio. Las empresas para asegurar la seguridad de los empleados le proporcionan diversos equipos de protección dependiendo del tipo de labor que realicen en la empresa.
La empresa donde se realizó la evaluación de seguridad e higiene está ubicada en el Parque Industrial portezuelo, Km. 5 ½ Carretera Norte, semáforo Portezuelo 400 metros al norte; Managua, Nicaragua.
TEXNICA. S.A. (Textilera Nicaragüense S.A.) es una empresa de producto textil, dedicada en su totalidad al ensamblaje de prendas de vestir según las especificaciones del cliente como: camisetas chort, pantalones, camisas de traje entre otros.
El siguiente trabajo muestra un Análisis y Evaluación de la seguridad e higiene realizado al momento de la visita, simultáneamente se realizó una encuesta para reflejar la situación Ergonómica, se verificaron los Efectos de la Seguridad que ocasionan la mala calidad en el producto en proceso y por último un análisis del Flujo y Capacidad con sus respectivas recomendacione
Development of Gold Nanoparticle-Doped Activated Carbon Sorbent for Elemental Mercury
The control of mercury (Hg) from coal-fired power plants by adsorption in solid sorbents is an attractive way to reduce Hg emissions. In this study, a commercial activated carbon (Norit RB3) was impregnated with gold nanoparticles for the retention of Hg in the gas phase, with the intention to explore their potential to be regenerated in future investigations. The activated carbon (RB3) was impregnated with different gold contents using polyvinyl alcohol (PVA) and tetrakis(hydroxymethyl)phosphonium chloride (THPC) to compare the performance of these two methods. Gold particles of ∼5 nm were obtained in the carbonaceous support for low gold contents (0.1%). With comparative purposes of the sorbent behavior, the Hg0 retention capacity was evaluated in a lab-scale device in an O2 + N2 atmosphere. Although the Hg retention capacities of these sorbents were similar by the two methods, a higher efficiency was achieved with THPC, being in some cases 80%. The results showed that the use of THPC is a promising means for dropping gold (0.1%) to make carbonaceous sorbents for use in Hg capture.The authors thank the CSIC (PIF-06-050) and the Spanish Ministerio de Ciencia
e Innovación (CTQ2008-06860-C02-01) for financial support.Peer reviewe
Adaptación de asignaturas seleccionadas de la titulación de Logopedia a créditos ETCS. Implicaciones del alumnado
Producción CientíficaSe presenta una primera experiencia práctica en el
marco del proceso de Convergencia Europea de la
enseñanza. El proyecto nace con el objetivo de adaptar
asignaturas seleccionadas del actual plan de estudios
de la Titulación (Diplomatura) de Logopedia al reciente
“Sistema de Transferencia de Créditos Europeos”
(créditos ECTS o European Credit Transfer System).
Con este fin se crea una red de carácter nacional en la
que participan la Universidad de Valladolid, Salamanca y
Castilla-La Mancha. En la presente comunicación se
explican de forma exhaustiva diversos aspectos
relacionados con la elaboración del proyecto: selección
de asignaturas, implicación de profesorado y alumnado,
así como la programación de actividades y acciones
que se están llevando a cabo actualmente
Degenerations of Jordan Superalgebras
We describe degenerations of three-dimensional Jordan superalgebras over
. In particular, we describe all irreducible components in the
corresponding varieties.Comment: arXiv admin note: text overlap with arXiv:1611.0645
Impaired Antibody-Dependent Cellular Cytotoxicity in a Spanish Cohort of Patients With COVID-19 Admitted to the ICU
SARS-CoV-2 infection causes COVID-19, ranging from mild to critical disease in symptomatic subjects. It is essential to better understand the immunologic responses occurring in patients with the most severe outcomes. In this study, parameters related to the humoral immune response elicited against SARS-CoV-2 were analysed in 61 patients with different presentations of COVID-19 who were recruited in Hospitals and Primary Healthcare Centres in Madrid, Spain, during the first pandemic peak between April and June 2020. Subjects were allocated as mild patients without hospitalization, severe patients hospitalized or critical patients requiring ICU assistance. Critical patients showed significantly enhanced levels of B cells with memory and plasmablast phenotypes, as well as higher levels of antibodies against SARS-CoV-2 with neutralization ability, which were particularly increased in male gender. Despite all this, antibody-dependent cell-mediated cytotoxicity was defective in these individuals. Besides, patients with critical COVID-19 also showed increased IgG levels against herpesvirus such as CMV, EBV, HSV-1 and VZV, as well as detectable CMV and EBV viremia in plasma. Altogether, these results suggest an enhanced but ineffectual immune response in patients with critical COVID-19 that allowed latent herpesvirus reactivation. These findings should be considered during the clinical management of these patients due to the potential contribution to the most severe disease during SARS-CoV-2 infection.This work was supported by the Coordinated Research Activities at the Centro Nacional de Microbiología (CNM, Instituto de Salud Carlos III) (COV20_00679) to promote an integrated response against SARS-CoV-2 in Spain (Spanish Ministry of Science and Innovation) that is coordinated by Dr Inmaculada Casas (WHO National Influenza Center of the CNM) and a generous donation provided by Chiesi España, S.A.U. (Barcelona, Spain). The funder was not involved in the study design, collection, analysis, interpretation of data, the writing of this article or the decision to submit it for publication. This work was also supported by the Spanish Ministry of Economy and Competitiveness (PID2019 110275RB-I00); the Spanish AIDS Research Network RD16CIII/0002/0001 that is included in Acción Estratégica en Salud, Plan Nacional de Investigación Científica, Desarrollo e Innovación Tecnológica 2016-2020, Instituto de Salud Carlos III, European Region Development Fund (ERDF); Miguel Servet - AESI, MPY 341/21. The work of ML-H and SR is financed by NIH grant R01AI143567. The work of MT is supported by Instituto de Salud Carlos III (COV20_00679). The work of LV is supported by a predoctoral grant from Instituto de Salud Carlos III (FIS PI16CIII/00034-ISCIII-FEDER).S
Estrategias docentes para el desarrollo de competencias profesionales en la nueva mención de Gestión del Ocio y la Cultura del Grado en Turismo
Memoria ID-0324. Ayudas de la Universidad de Salamanca para la innovación docente, curso 2014-2015
Association between HLA-C alleles and COVID-19 severity in a pilot study with a Spanish Mediterranean Caucasian cohort
The clinical presentations of COVID-19 may range from an asymptomatic or mild infection to a critical or fatal disease. Several host factors such as elderly age, male gender, and previous comorbidities seem to be involved in the most severe outcomes, but also an impaired immune response that causes a hyperinflammatory state but is unable to clear the infection. In order to get further understanding about this impaired immune response, we aimed to determine the association of specific HLA alleles with different clinical presentations of COVID-19. Therefore, we analyzed HLA Class I and II, as well as KIR gene sequences, in 72 individuals with Spanish Mediterranean Caucasian ethnicity who presented mild, severe, or critical COVID-19, according to their clinical characteristics and management. This cohort was recruited in Madrid (Spain) during the first and second pandemic waves between April and October 2020. There were no significant differences in HLA-A or HLA-B alleles among groups. However, despite the small sample size, we found that HLA-C alleles from group C1 HLA-C*08:02, -C*12:03, or -C*16:01 were more frequently associated in individuals with mild COVID-19 (43.8%) than in individuals with severe (8.3%; p = 0.0030; pc = 0.033) and critical (16.1%; p = 0.0014; pc = 0.0154) disease. C1 alleles are supposed to be highly efficient to present peptides to T cells, and HLA-C*12:03 may present a high number of verified epitopes from abundant SARS-CoV-2 proteins M, N, and S, thereby being allegedly able to trigger an efficient antiviral response. On the contrary, C2 alleles are usually poorly expressed on the cell surface due to low association with β2-microglobulin (β2M) and peptides, which may impede the adequate formation of stable HLA-C/β2M/peptide heterotrimers. Consequently, this pilot study described significant differences in the presence of specific HLA-C1 alleles in individuals with different clinical presentations of COVID-19, thereby suggesting that HLA haplotyping could be valuable to get further understanding in the underlying mechanisms of the impaired immune response during critical COVID-19.This work was supported by the Coordinated Research Activities at the Centro Nacional de Microbiologı´a (CNM, Instituto de Salud Carlos III) (COV20_00679) to promote an integrated response against SARS-CoV-2 in Spain (Spanish Ministry of Science and Innovation) that is coordinated by Dr Inmaculada Casas (WHO National Influenza Center of the CNM); donation provided by Chiesi España, S.A.U. (Barcelona, Spain); the Spanish Ministry of Science and Innovation (PID2019-110275RB-I00); and grant MPY509/19 provided by Instituto de Salud Carlos III. The work of MRLH and SRM is financed by NIH grant R01AI143567. The work of LV is supported by a pre-doctoral contract from Instituto de Salud Carlos III (FIS PI16CIII/00034-ISCIII-FEDER). The work of MT is supported by Instituto de Salud Carlos III (COV20_00679). AJMG is the recipient of a post-doctoral contract“Miguel Servet” supported by the Instituto de Salud Carlos III.S
Impaired Cytotoxic Response in PBMCs From Patients With COVID-19 Admitted to the ICU: Biomarkers to Predict Disease Severity
Infection by novel coronavirus SARS-CoV-2 causes different presentations of COVID-19 and some patients may progress to a critical, fatal form of the disease that requires their admission to ICU and invasive mechanical ventilation. In order to predict in advance which patients could be more susceptible to develop a critical form of COVID-19, it is essential to define the most adequate biomarkers. In this study, we analyzed several parameters related to the cellular immune response in blood samples from 109 patients with different presentations of COVID-19 who were recruited in Hospitals and Primary Healthcare Centers in Madrid, Spain, during the first pandemic peak between April and June 2020. Hospitalized patients with the most severe forms of COVID-19 showed a potent inflammatory response that was not translated into an efficient immune response. Despite the high levels of effector cytotoxic cell populations such as NK, NKT and CD8+ T cells, they displayed immune exhaustion markers and poor cytotoxic functionality against target cells infected with pseudotyped SARS-CoV-2 or cells lacking MHC class I molecules. Moreover, patients with critical COVID-19 showed low levels of the highly cytotoxic TCRγδ+ CD8+ T cell subpopulation. Conversely, CD4 count was greatly reduced in association to high levels of Tregs, low plasma IL-2 and impaired Th1 differentiation. The relative importance of these immunological parameters to predict COVID-19 severity was analyzed by Random Forest algorithm and we concluded that the most important features were related to an efficient cytotoxic response. Therefore, efforts to fight against SARS-CoV-2 infection should be focused not only to decrease the disproportionate inflammatory response, but also to elicit an efficient cytotoxic response against the infected cells and to reduce viral replication.This work was supported by the Coordinated Research Activities at the Centro Nacional de Microbiología (CNM, Instituto de Salud Carlos III) (COV20_00679) to promote an integrated response against SARS-CoV-2 in Spain (Spanish Ministry of Science and Innovation) that is coordinated by Dr. Inmaculada Casas (WHO National Influenza Center of the CNM); a generous donation provided by Chiesi España, S.A.U. (Barcelona, Spain); the Spanish Ministry of Economy and Competitiveness (PID2019-110275RB-I00); the Spanish AIDS Research Network RD16CIII/0002/0001 that is included in Acciόn Estratégica en Salud, Plan Nacional de Investigaciόn Científica, Desarrollo e Innovaciόn Tecnolόgica 2016-2020, Instituto de Salud Carlos III, European Region Development Fund (ERDF). The work of ML-H and SR-M is financed by NIH grant R01AI143567. The work of LH is supported by a pre-doctoral grant from Instituto de Salud Carlos III (FIS PI16CIII/00034-ISCIII-FEDER).S
Intensity noise self-regulated solid-state laser at 1.5m using an ASHG based Buffer Reservoir
An absorption mechanism based on second-harmonic generation (ASHG) is
successfully implemented as a buffer reservoir in a solid-state Er,Yb:Glass
laser emitting at telecom wavelength. We show that a slight ASHG rate
conversion of 0.016% using a BBO crystal enables to cancel out the excess
intensity noise at the relaxation oscillation frequency, i.e. 35 dB reduction,
as well as to cancel the amplified spontaneous emission beating at the free
spectral range resonances of the laser lying in the GHz range.Comment: 6 pages, 5 figure
Formación del profesorado de Geografía y ciencias afines en docencia online y semipresencial basada en tecnologías de la información geográfica y ODS (DIDGEOTIG-II)
Este proyecto de innovación docente ha pretendido incorporar la semipresencialidad a la capacitación del profesorado/alumnado de Geografía y ciencias afines en docencia virtual basada en TIG abiertas y ODS, aportando soluciones a la brecha digital, la insostenibilidad y la educación despersonalizada.
Se ha configurado una guía didáctica de actividades basadas en TIG para enseñar contenidos de educación geográfica para el desarrollo sostenible, combinando tareas virtuales con intervenciones presenciales, en favor de la salud mental de los agentes educativos y una mayor eficacia didáctica.
La guía ha tenido en cuenta una encuesta de detección y valoración de problemas y soluciones en la enseñanza virtual de la Geografía, y algunas de sus actividades han sido testadas empíricamente, con una valoración docente y discente que ha validado la adecuación del enfoque semipresencial, geodigital y sostenible de la guía didáctica
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