Eficiencia del floculante sulfato de aluminio y polifloc (policloruro de alumnio) en la remoción de metales y depuración de aguas residuales de una empresa minera en Cajamarca, 2019

La presente investigación se realizó debido a que en una empresa minera de Cajamarca, se identificó en sus aguas residuales la presencia de metales pesados, por lo cual se planteó evaluar la eficiencia del sulfato de aluminio y policloruro de aluminio, como floculantes en un tratamiento alternativo para tratar estas aguas para cuatro de los metales pesados (Cu, Fe, Mn y Pb), que se encontraban en bajas concentraciones pero que aún estaban por encima de los LPM, para lo cual se realizaron un total de 8 pruebas y asimismo se evalúo la dosis óptima de ambos reactivos. Los resultados encontrados nos indican que los floculantes sulfato de aluminio y policloruro de aluminio son eficientes en un 79.73% y 87.95% durante el tratamiento de aguas residuales de mina, ya que en los análisis de muestras se logró disminuir la turbidez del agua, en promedio de 10 NTU, así mismo el pH lo mantienen dentro del parámetro que indican los LMP. Al combinar los dos reactivos se obtuvo en promedio como dosis óptima 25.75 (mg/L) de sulfato de aluminio y 0.49 (mg/L) de policloruro de aluminio permiten realizar un proceso de tratamiento de aguas con resultados favorables y según los parámetros indicados en la normativa establecida por la OMS (Organización mundial de la salud). Para la remoción de los metales se utilizó 70 (mg/L) de policloruro de aluminio en una muestra de 2 litro lo cual permitió reducir la concentración de los metales por debajo de los LPM

Análisis de la legítima defensa de la mujer víctima de violencia familiar en el entorno de lesiones recíprocas Piura – 2020

La presente investigación tiene su génesis en la realidad actual que se manifiesta cuando las mujeres al ser víctimas de una agresión ilegítima en el ámbito familiar, han provocado lesiones a sus agresores, dando como resultado que afronten procesos penales por el delito de lesiones, ello a pesar de haber actuado en defensa de un bien jurídico propio o de un tercero. Es por ello que se tiene como objetivo general valorar los presupuestos jurídicos para aplicar la legítima defensa en el delito de agresiones contra la mujer en el contexto de violencia familiar. El tipo de investigación es mixta con predominio en lo cuantitativo de diseño no experimental, la técnica empleada fue la entrevista y su instrumento la guía de entrevista, aplicada a una muestra de 15 funcionarios que laboran en las Fiscalías Provinciales Corporativas Especializadas en delitos de violencia en contra de la mujer y los integrantes de grupo familiar de Piura. Obteniendo como principal resultado que el 93.33 por ciento de los entrevistados señalan que al valorarse e interpretarse de manera correcta, se podría aplicar la figura de la legitima defensa y esto constituiría una causal de justificación de responsabilidad penal

Identificación de los contaminantes causantes de enfermedades profesionales y la implementación de controles de seguridad en la curtiembre Incapieles E.I.R.L. del Parque Industrial de Rio Seco

El presente trabajo de investigación tiene como propósito la identificación de los agentes ambientales en las operaciones y procesos de la industria de la transformación de pieles de animales en cuero como producto final en la empresa Incapieles E.I.R.L. que se encuentra ubicada en el Parque Industrial de Rio Seco. Para el desarrollo de la investigación se emplea un nivel básico cualitativo y cuantitativo de tipo descriptivo no experimental y con toma de datos y trabajo en campo. La población en la empresa es de 16 trabajadores, por ello es que la muestra es equivalente a la población. Luego de la identificación, análisis y tratamiento de los datos se confirma que existen exposiciones elevadas a los agentes contaminantes generadores de las enfermedades profesionales, por tal medida se acepta la hipótesis en donde se identifican los contaminantes, los cuales superan los valores máximos admisibles considerados en la legislación peruana en la curtiembre. La investigación se concluye cuando los agentes como ruido, humedad, toxicidad superan los límites establecidos legalmente; sin embargo, las vibraciones y la cantidad de polvo presente en las actividades de la curtiembre se encuentran por debajo de los límites máximo permisibles.El presente trabajo de investigación tiene como propósito la identificación de los agentes ambientales en las The purpose of this research work is the identification of environmental agents in the operations and processes of the leather animal processing industry as a final product in the company Incapieles E.I.R.L. which is located in the Industrial Park of Rio Seco. For the development of the research, a qualitative and quantitative basic level of a non-experimental descriptive type is used, with data collection and field work. The population in the company is 16 workers, which is why the sample is equivalent to the population. After the identification, analysis and treatment of the data it is confirmed that there are high exposures to the polluting agents that generate the occupational diseases, for this reason the hypothesis is accepted where the contaminants are identified, which exceed the maximum admissible values considered in Peruvian legislation in tannery. The investigation is concluded when agents such as noise, humidity, toxicity exceed the legally established limits; however, the vibrations and the amount of dust present in tannery activities are below the maximum permissible limits.Trabajo de investigaciónCampus Arequip

The novel immunomodulator IMMUNEPOTENT CRP combined with chemotherapy agent increased the rate of immunogenic cell death and prevented melanoma growth

Abstract. Immunogenic cell death is a cell death modality that stimulates the immune system to combat cancer cells. IMMUNEPOTENT CRP (ICRP) is a mixture of substances of low molecular weight obtained from bovine spleens that exhibits in vitro cytotoxic activity on different tumor cell lines and modulates the immune response in vivo. The aim of the present study was to determine whether the cytotoxic effect of ICRP and its combination with oxaliplatin (OXP) on murine melanoma B16F10 cells was due to immunogenic cell death. The cytotoxic assay was performed using flow cytometry to detect Annexin V and propidium iodide staining, and calreticulin (CRT) exposure. Adenosine triphosphate, heat shock protein (HSP) 70, HSP90 and high mobility group box 1 (HMGB1) release were identified using bioluminescence, western blot and ELISA assays, respectively. The present in vitro study demonstrated that treatments with ICRP or OXP induced cell death in a time-dependent manner, but treatment with the combination of ICRP + OXP increased the cytotoxic effect following 24 h of treatment. CRT exposure and release of adenosine triphosphate (ATP), HSP70, HSP90 and HMGB1 were induced by treatment with ICRP, and the combination of ICRP + OXP increased the exposure and release of damage-associated molecular patterns (DAMPs), while OXP treatment only induced CRT exposure, ATP and HMGB1 release. The in vivo experiments demonstrated that administration of tumor-derived DAMP-rich cell lysates derived from B16F10 cells treated with ICRP and the combination of ICRP + OXP prevented melanoma growth; however, OXP treatment did not. These results suggested that IMMUNEPOTENT CRP may be used as an agent to increase the ability of antitumor drugs to induce immunogenic cell death and prevent the growth of melanoma

Violencia de género desde el año 2008 hasta el año 2011 en Colombia y su incidencia en la ciudad de Pereira

T 362.8292 G165; 93 p.En esta monografía se pretendió establecer los factores que generan violencia de género en Colombia, período 2008-2011, para lo cual fue necesario identificar los factores culturales que conllevan a este tipo de violencia.Universidad Libre de Pereir

Cigarette smoking and metabolic syndrome components: a cross-sectional study from Maracaibo City, Venezuela [version 3; referees: 2 approved]

Background: A growing body of evidence suggests that cigarette smoking can cause the onset of metabolic syndrome prior to cardiovascular diseases. Therefore, the objective of this study was to evaluate the relationship between smoking habit and metabolic syndrome components in an adult population from Maracaibo city, Venezuela. Methods: The Maracaibo City Metabolic Syndrome Prevalence Study is a descriptive, cross-sectional study with random and multi-stage sampling. In this sub-study, 2212 adults from both genders were selected. On the basis of their medical background, they were classified as smokers, non-smokers and former smokers. Metabolic syndrome was defined according to Harmonizing 2009 criteria, using population-specific abdominal circumference cut-off points. The association between risk factors was evaluated using a logistic regression model. Results: In the studied population, 14.8% were smokers, 15.4% were former smokers. In the multivariate analysis, the presence of metabolic syndrome (smokers: OR, 1.54; 95% CI, 1.11–2.14; p=0.010) and its components were related to cigarette smoking, with the exception of hyperglycemia. High blood pressure was inversely associated with current smoking status (smokers: OR, 0.70 (0.51–0.95); p=0.025). Conclusion: Cigarette smoking represents a related factor with metabolic syndrome, being associated with low high-density lipoprotein-cholesterol, increased abdominal circumference and elevated triacylglyceride levels. Former smokers did not present a greater risk for developing this metabolic disease when compared to non-smokers. The effect of avoiding this habit should be evaluated in future studies in our population

Measurement of the cross-section and charge asymmetry of WW bosons produced in proton-proton collisions at s=8\sqrt{s}=8 TeV with the ATLAS detector

This paper presents measurements of the $W^+ \rightarrow \mu^+\nu$ and $W^- \rightarrow \mu^-\nu$ cross-sections and the associated charge asymmetry as a function of the absolute pseudorapidity of the decay muon. The data were collected in proton--proton collisions at a centre-of-mass energy of 8 TeV with the ATLAS experiment at the LHC and correspond to a total integrated luminosity of 20.2~\mbox{fb^{-1}}. The precision of the cross-section measurements varies between 0.8% to 1.5% as a function of the pseudorapidity, excluding the 1.9% uncertainty on the integrated luminosity. The charge asymmetry is measured with an uncertainty between 0.002 and 0.003. The results are compared with predictions based on next-to-next-to-leading-order calculations with various parton distribution functions and have the sensitivity to discriminate between them.Comment: 38 pages in total, author list starting page 22, 5 figures, 4 tables, submitted to EPJC. All figures including auxiliary figures are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/STDM-2017-13

14-day triple, 5-day concomitant, and 10-day sequential therapies for Helicobacter pylori infection in seven Latin American sites: a randomised trial

Evidence from Europe, Asia, and North America suggests that standard three-drug regimens of a proton pump inhibitor plus amoxicillin and clarithromycin are significantly less effective for eradicating Helicobacter pylori (H. pylori) infection than five-day concomitant and ten-day sequential four-drug regimens that include a nitroimidazole. These four-drug regimens also entail fewer antibiotic doses and thus may be suitable for eradication programs in low-resource settings. Studies are limited from Latin America, however, where the burden of H. pylori-associated diseases is high

Search for chargino-neutralino production with mass splittings near the electroweak scale in three-lepton final states in √s=13 TeV pp collisions with the ATLAS detector

A search for supersymmetry through the pair production of electroweakinos with mass splittings near the electroweak scale and decaying via on-shell W and Z bosons is presented for a three-lepton final state. The analyzed proton-proton collision data taken at a center-of-mass energy of √s=13  TeV were collected between 2015 and 2018 by the ATLAS experiment at the Large Hadron Collider, corresponding to an integrated luminosity of 139  fb−1. A search, emulating the recursive jigsaw reconstruction technique with easily reproducible laboratory-frame variables, is performed. The two excesses observed in the 2015–2016 data recursive jigsaw analysis in the low-mass three-lepton phase space are reproduced. Results with the full data set are in agreement with the Standard Model expectations. They are interpreted to set exclusion limits at the 95% confidence level on simplified models of chargino-neutralino pair production for masses up to 345 GeV

Risk of Recurrent Helicobacter pylori Infection 1 Year After Initial Eradication Therapy in 7 Latin American Communities

The long-term effectiveness of Helicobacter pylori eradication programs for preventing gastric cancer will depend on recurrence risk and individual and community factors