Sensory quality control of alcoholic beverages using fast chemical sensors

Control de calidad sensorial de bebidas alcohólicas utilizando rápidos sensores químicosEn la presente tesis Doctoral, han sido aplicados dos sensores artificiales para el análisis debebidas alcohólicas: la nariz electrónica basada en la espectrometría de masas (MS) y la lenguaelectrónica basada en la espectroscopía infrarroja con transformada de Fourier (FTIR). Elpropósito fue desarrollar nuevas estrategias para analizar la autenticidad de estos productos,desde un punto de vista sensorial, por medio de técnicas las espectrales antes mencionadas.Adicionalmente, ha sido utilizado un espectrofotómetro UV-visible como ojo electrónico. Eltrabajo presentado pretende ser un avance significativo hacia el desarrollo de un catadorelectrónico mediante la fusión de los tres sensores químicos: nariz electrónica, lenguaelectrónica y ojo electrónico.Sensory quality control of alcoholic beverages using fast chemical sensorsIn the present Doctoral Thesis, two chemical artificial sensors are applied to the analysis ofalcoholic beverages: the Mass Spectrometry (MS)-based electronic-noses and Fouriertransform infrared (FTIR)-based electronic-tongue. The aim was developing new strategies totest the authenticity of these products, from a sensory point of view, by means of the spectraltechniques above mentioned. Additionally, has been used an UV-visible spectrophotometer aselectronic eye. The work presented wants to be a significant advance towards the developmentof an electronic taster through the fusion of three chemical sensors: electronic nose, electronictongue and electronic eye

Novos Dilemas sobre Ciências na Gestão Universitária: os Comitês de Ética na Experimentação com Animais

Um dos grandes desafios contemporâneos nas universidades brasileiras tem sido a implantação, a gestão e a interpretação dos Comitês de Ética, notadamente os comitês ligados aos experimentos com animais. No último quarto do século XX, diferentes situações expuseram de forma contundente um novo posicionamento quanto à questão da dominação sobre os animais. Algumas entidades de preservação e conservação da natureza passaram a denunciar de forma sistemática os abusos causados aos animais selvagens, especialmente os que se encontravam ameaçados de extinção eminente. Um marco foi a promulgação em 1978 da Declaração Universal dos Direitos dos Animais, pela Unesco em Bruxelas, Bélgica. Nesta Declaração o homem tem responsabilidade sobre a vida e bemestar das demais espécies do planeta, tornando os animais sujeitos de direito, qualidade que era até então apenas dos humanos

Implementación de sistema de gestión de seguridad basado en la Ley 29783 en la empresa JJD Contratistas S. A. C., año 2021

El presente trabajo de investigación se realiza la implementación de un sistema de gestión de seguridad y salud en el trabajo basado en la ley 29783; para disminuir los riesgos laborales en una empresa JJD Contratistas S.A.C quien presta sus servicios en el área de acarreo y transportes en la UM Parcoy – Consorcio Minero Horizonte, desde el año 2015 hasta la actualidad. Esta investigación dio a conocer el diagnóstico situacional del SGSST ejecutada en la empresa JJD Contratistas S.A.C; la cual es de 40.52 % del cumplimiento de las normativas legales, muy por debajo de lo que establece la normativa vigente peruana. Después de realizar la implementación del SGSST basado en la ley 29783 y su modificatoria la 30222, contribuyó favorablemente al cumplimiento de los objetivos de seguridad en un 97 %, logrando reducir los indicadores de SSO en un 100.00 % tales como; índice de frecuencia, severidad y accidentabilidad, incrementando en un 47.00 % las horas hombre capacitadas, y en un 100.00 % el cumplimiento de los simulacros programados en el plan anual de SSO, durante el periodo de prueba del año 2021. Finalmente se pudo incrementar el cumplimiento en un 48.44 % de los requisitos legales exigidos por la normativa vigente peruana Ley 29783 y su Modificatoria la 30222

Plasticity of stingless bee Melipona fuliginosa Lepeletier to obtain food resources in Amazonia

The stingless bee Melipona fuliginosa Lepeletier is described as being aggressive robber, but there is little information about its raids. Here, we describe two different raids of M. fuliginosa on other Melipona species: Melipona paraensis Ducke and Melipona fasciculata Smith. The robbing behavior was observed in the Volta Grande do Xingu region (Pará) and Carajás National Forest (Pará), and the attacks by M. fuliginosa occurred at the end of the dry season, shortly before the start of the rainy season, a time of flower scarcity. The raid on M. paraensis hive lasted five days and involved no deaths of worker bees of both species; the robbers collected honey and wax. During the pillaging, M. fuliginosa workers dedicated themselves exclusively to this task; their flight activity peaked between 8:00 a.m. and 12:00 p.m. but lasted until 6:00 p.m, which is atypical for the species. The raid on M. fasciculata differed from the other event because it led to the extermination of all forager workers of fi ve colonies, however, the brood combs as well as the callow workers were preserved; the robbers collected honey and wax. M. fuliginosa attack defensive and non-defensive colonies, the events can cause severe damage and may lead to death of the victim colony in natural conditions. Flight activity varies from foraging on fl owers during dawn to all day long robbing, showing considerable plasticity to obtain food resources. Robbing behavior could be associated to fl ower scarcity and artificial feeding

Prospective application of melanized fungi for the biofiltration of indoor air in closed bioregenerative systems

Cultures of melanized fungi representative of the black yeast orders Capnodiales (Cladosporium cladosporioides and Neohortaea acidophila) and Chaetothyriales (Cladophialophora psammophila) were confined with indoor air from the laboratory during 48 h. Volatile organic compounds (VOCs) from the headspace were analyzed by thermal desorption gas chromatography time-of-fly mass spectrometry (TD-GC-ToFMS, detection threshold 0.1 μg m−3) and compared against an abiotic control. A mixture of 71 VOCs were identified and quantified in the indoor air (total concentration 1.4 mg m−3). Most of these compounds were removed in the presence of fungal biomass, but 40 newly formed putative volatile metabolites were detected, though at comparatively low total concentrations (<50 μg m−3). The VOCs emission profile of C. cladosporioides, a ubiquitous and well-known species often associated to the sick building syndrome, was consistent with previous literature reports. The specialized C. psammophila and N. acidophila, isolated respectively from gasoline polluted soil and from lignite, displayed rather specific VOCs emission profiles. Mass balances on the fungal uptake and generation of VOCs resulted in overall VOCs removal efficiencies higher than 96% with all tested fungi. Applied aspects and biosafety issues concerning the suitability of black yeasts for the biofiltration of indoor air have been discussed.info:eu-repo/semantics/acceptedVersio

Volatile Organic Compounds in the Azteca/Cecropia Ant-Plant Symbiosis and the Role of Black Fungi

Black fungi of the order Chaetothyriales are grown by many tropical plant-mutualistic ants as small so-called “patches” in their nests, which are located inside hollow structures provided by the host plant (“domatia”). These fungi are introduced and fostered by the ants, indicating that they are important for the colony. As several species of Chaetothyriales tolerate, adsorb, and metabolize toxic volatiles, we investigated the composition of volatile organic compounds (VOCs) of selected domatia in the Azteca/Cecropia ant-plant mutualism. Concentrations of VOCs in ant-inhabited domatia, empty domatia, and background air were compared. In total, 211 compounds belonging to 19 chemical families were identified. Ant-inhabited domatia were dominated by ketones with 2-heptanone, a well-known ant alarm semiochemical, as the most abundant volatile. Empty domatia were characterized by relatively high concentrations of the monoterpenes d-limonene, p-cymene and β-phellandrene, as well as the heterocyclic sulphur-containing compound, benzothiazole. These compounds have biocidal properties and are primarily biosynthesized by plants as a defense mechanism. Interestingly, most of the latter compounds were present at lower concentrations in ant inhabited domatia than in non-colonized ones. We suggest that Chaetothyriales may play a role in reducing the VOCs, underlining that the mutualistic nature of these fungi as VOCs accumulation might be detrimental for the ants, especially the larvae.info:eu-repo/semantics/publishedVersio

Treatment of left main coronary artery lesion after late thoracic radiotherapy

A prevenção de complicações cardiovasculares tardias após radioterapia (RT) para tratamento de um tumor maligno é um desafio. Relatamos o caso de um jovem paciente com linfoma de Hodgkin submetido a tratamento com RT que desenvolveu doença cardíaca isquêmica no seguimento, embora não apresentasse fatores de risco cardiovasculares. Concluímos que pacientes submetidos a RT que apresentam dor torácica deveriam ser criteriosamente avaliados em relação à doença arterial coronariana.Prevention of late cardiovascular complications after radiation therapy (RT) for treatment of a malignant tumor is challenging. We report the case of a young male patient with Hodgkin's lymphoma treated with RT, who developed ischemic heart disease during follow-up, although he had no cardiovascular risk factors. We conclude that patients undergoing RT who experience chest pain should be fully investigated for coronary artery disease

O universo da leitura inserido no contexto da saúde mental: uma investigação institucional sobre as leituras em meio ao emocional e motivacional e suas influências psicológicas no corpo discente da Universidade Federal do Pampa, Campus São Gabriel

This article aims to present the results of a questionnaire applied in undergraduate courses at theFederal University of Pampa - Unipampa, campus São Gabriel - Brazil, which had an emphasis onreading. The aim of the questionnaire was checking the types and frequency of reading the samein the lives of academics. The results show us what types of readings are made and the frequencywith which they are carried out by academics. Thus, serving as an instrument of the universitypopulation of readers, and open the possibility of identifying the potential of students andintervene in potential problems faced in acquiring knowledge through reading.O presente artigo tem como finalidade apresentar os resultados de um questionário aplicado nos cursos de graduação da Universidade Federal do Pampa – Unipampa, campus São Gabriel, que teve como ênfase a leitura. O objetivo do referido questionário foi a verificação de quais os tipos de leitura e a frequência da mesma na vida desses acadêmicos. Os resultados nos mostram quais os tipos de leituras são feita e a frequência com que são realizadas pelos acadêmicos. Dessa forma, servindo como um instrumento demográfico dos leitores da universidade, além de abrir a possibilidade de identificar as potencialidades dos alunos e intervir nos possíveis problemas enfrentados na aquisição de conhecimento através de leitura

Chemical Composition of Argentinean Propolis Collected in Extreme Regions and its Relation with Antimicrobial and Antioxidant Activities

This paper reveals, for the first time, the functional properties of propolis from an extreme region of Argentine (El Rincón, Province of Catamarca, Argentina), as well as the isolation and identification of bioactive compounds. The antioxidant activity was determined by the ABTS method and β-carotene bleaching. The antibacterial activity was determined on methicillin resistant Staphylococcus aureus (MRSA) by the microdilution method and bioautographic assays. Twelve compounds were isolated and identified by NMR spectroscopy. The main bioactive compounds were 2′,4′-dihydroxy-3′-methoxychalcone (3), 2′,4′-dihydroxychalcone (9), 2′,4′,4-trihydroxy-6′- methoxychalcone (8), 5-hydroxy-4′,7-dimethoxyflavone (4), 4′,5-dihydroxy-3,7,8-trimethoxyflavone (10) and 7-hydroxy- 5,8-dimethoxyflavone (11). All compounds were active against clinical isolates (MIC50 10 μg/ mL) and displayed antioxidant activity (SC50 values of 20 μg/mL). The MIC and SC50 values of the isolated compounds were lower than those obtained with crude propolis extracts, chloroform sub-extracts and isolated fractions.EEA FamailláFil: Vera, Nancy Roxana. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; ArgentinaFil: Vera, Nancy Roxana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Famaillá; ArgentinaFil: Solórzano, Eliana. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Instituto de Química del Noroeste; ArgentinaFil: Ordóñez, Roxana Mabel. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; ArgentinaFil: Ordóñez, Roxana Mabel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Instituto de Quimica del Noroeste; Argentina.Fil: Maldonado, Luis Maria. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Famaillá; ArgentinaFil: Bedascarrasbure, Enrique Luciano. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Famaillá; ArgentinaFil: Isla, Maria Ines. Universidad Nacional de Tucumán. Facultad de Bioquímica, Química y Farmacia; ArgentinaFil: Isla, Maria Ines. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Tucumán. Instituto de Quimica del Noroeste; Argentin