“Mercado colorido”:: percepções de gays sobre o mercado de trabalho de Teresina-PI.

O espaço organizacional apresenta-se como um dos principais locais em que se encontram manifestos os dilemas da atualidade, entre eles, a discriminação baseada na orientação sexual. Nessa pesquisa, buscou-se analisar as percepções de homossexuais sobre o ser gay nas organizações de trabalho. Para tanto, aplicou-se entrevista semiestruturada em 10 homossexuais do sexo masculino e utilizou-se como orientação metodológica a Análise de Conteúdo. Os homossexuais perceberam diversas formas de preconceito e assédio referente à sua orientação sexual, tanto na sociedade, quanto nas organizações.  O “sair do armário” foi identificado como um fator complicador para o gay frente ao mercado de trabalho e as características femininas dos gays foram apontadas de forma negativa e preconceituosa, perpetuando em consequências na saúde emocional destes. A superação da discriminação só é possível a partir da desconstrução de modelos heteronormativos

INVESTIGAÇÃO SOBRE AS RELAÇÕES FAMILIARES DE IDOSOS COM IDEAÇÃO SUICIDA E TENTATIVA DE SUICÍDIO

Risk factors for suicide in the elderly are mainly related to death of loved ones, illness and family relationships. Thus, this article analyzes the family relationships of the elderly with ideation and suicidal attempts. Made in the city of Teresina-PI, since it is among the ten municipalities with the highest rate of suicide among the elderly. It was verified that the surveyed elderly experience conflicts in family relationships, feel scorned, abandoned and rejected by relatives, reasons for which they blame themselves; they live together in a family environment, but in an isolated way, they live socially isolated and in psychic suffering, with mental disorders, which favor suicidal ideation. Thus, the researched elderly seek religiosity as ways of coping and giving meaning to life.Os fatores de risco para o suicídio em pessoas idosas são, principalmente, relacionados a morte de entes queridos, doenças e relações familiares. Assim, este artigo analisa as relações familiares de idosos com ideação e tentativas suicidas. Realizado na cidade de Teresina-PI, visto que se encontra entre os dez municípios nacionais com maior índice de ocorrência de suicídio entre idosos. Verificou-se que os idosos pesquisados vivenciam conflitos nas relações familiares, sentem-se desprezados, abandonados e rejeitados pelos familiares, motivos pelos quais se culpam; convivem em meio familiar, mas de modo isolado, vivem isolados socialmente e em sofrimento psíquico, com transtornos mentais, que favorecem a ideação suicida. Assim, os idosos pesquisados buscam a religiosidade como formas de enfrentamento e de dar sentido à vida

Tuberculose pulmonar: perfil epidemiológico do sertão Pernambucano, Brasil / Pulmonary tuberculosis: epidemiological profile of sertão Pernambucano, Brazil

Atualmente, observa-se que a tuberculose pulmonar constitui um importante problema de Saúde Pública no mundo, uma vez que esse agravo apresentou, em 2015, 10,4 milhões de casos, dos quais, mais de um milhão de pessoas vieram a óbito. Sob essa perspectiva, o presente artigo tem como objetivo traçar um perfil epidemiológico dos casos de Tuberculose Pulmonar notificados no município de Serra Talhada, entre os anos de 2007 a 2017. Foi realizado um estudo de série histórica observacional do tipo transversal, no intervalo de tempo de 2007 a 2017.  No período investigado o número de casos de tuberculose pulmonar foi de 246 casos, o local que teve a maior prevalência foi Serra Talhada, 287 por 100 mil habitantes. Diante dos dados apresentados, é imprescindível concluir, portanto, que esse estudo corrobora o perfil epidemiológico brasileiro para a Tuberculose Pulmonar, o qual indica variabilidade nos índices de acometimento durante o período analisado

Electrostatic interactions regulate the physical properties of gelatin-cellulose nanocrystals nanocomposite films intended for biodegradable packaging

International audienceCellulose nanocrystals (CNCs)-reinforced gelatin (Gel) films are appealing candidates for biodegradable packaging. However, tailoring the physical properties of Gel/CNCs films by control of pH and film-forming drying temperature continues unstudied. Here, we described the influence of pH on the physical properties of Gel/CNCs films covering different CNCs contents. The interactions between CNCs and Gel were studied by assessing the ζ-potential of Gel/CNCs suspensions under acidic (pH 3), Gel isoelectric point (pI, pH 6) and alkaline (pH 8) conditions. pH 3 promotes the electrostatic attraction, while pH 8 favors the electrostatic repulsion in the Gel-CNCs pair, increasing the suspension viscosity in both cases. The addition of 0.5 wt% CNCs decreased the water vapor permeability (WVP) of the Gel/CNCs films by 68% under electrostatic attractive forces and by 39% at the gelatin pI. The addition of 5 wt% CNCs at pH 3 resulted in the formation of complex coacervates, which decreased the mechanical properties and increased the WVP of Gel/CNCs films. Increasing pH above the Gel pI remarkedly increased the gelatin renaturation as triple helices, which was found to be key for increasing by 152% and 56% the Young's modulus and tensile strength, respectively, of the Gel/CNCs films with 0.5 wt% CNCsFilm-forming drying temperatures had an inverse effect on the triple helix content, and, consequently, on the physical properties of the Gel/CNCs films. These findings denote that modulating pH, CNCs amount, and drying temperature is a suitable strategy for tailoring the properties of nanocellulose-reinforced gelatin films for an extended range of food packaging applications

Propriedades reológicas de soluções filmogênicas de gelatina e nanocristais de celulose para produção de filmes biodegradáveis por casting contínuo

International audienceMost studies for the production of protein-based films make use of the classical casting technique. However, this technique requires relatively long drying times and obtains films with small dimensions, which makes this technique impractical on an industrial scale. In this work, we propose to study a suitable formulation to produce large-scale biodegradable gelatin films by continuous casting, as well as to investigate the effect of the addition of CNCs on the physical properties of the obtained films. Gelatin/CNCs films produced by continuous casting exhibited homogeneity and continuity, and absence of fractures and insoluble particles on the surface. In addition, the addition of 1% by mass of CNCs to the gelatin bionanocomposite led to an increase in elongation at break of 148%, compared to the pure gelatin film. The results show that gelatin/CNCs films have a high performance, and that the use of continuous casting is a compatible large-scale processing method for the production of biodegradable films from gelatin.A maioria dos estudos para produção de filmes à base de proteínas faz uso da técnica clássica de casting. No entanto, esta técnica requer tempos de secagem relativamente longos e obtém filmes com pequenas dimensões, o que torna essa técnica impraticável em escala industrial. Neste trabalho, propomos estudar uma formulação adequada para produzir filmes biodegradáveis de gelatina em larga escala por casting contínuo, bem como investigar o efeito da adição de CNCs nas propriedades físicas dos filmes obtidos. Os filmes de gelatina/CNCs produzidos por casting contínuo exibiram homogeneidade e continuidade, e ausência de fraturas e partículas insolúveis na superfície. Além disso, a adição de 1% em massa de CNCs ao bionanocompósito de gelatina levou a um aumento no alongamento a ruptura de 148%, em comparação com o puro filme de gelatina. Os resultados mostram que os filmes de gelatina/CNCs apresentam um alto desempenho, e que o uso de casting contínuo é um método de processamento em larga escala compatível para a produção de filmes biodegradáveis a partir de gelatina

Effect of Tannic Acid and Cellulose Nanocrystals on Antioxidant and Antimicrobial Properties of Gelatin Films

This work explored gelatin films incorporated with cellulose nanocrystals (CNC) and tannic acid as bio-based multifunctional food packaging materials. The effects of nonoxidized tannic acid (nTA), oxidized tannic acid (OTA), and CNC on the physical, antioxidant, and antimicrobial properties of gelatin films were investigated. Rheological and ultraviolet (UV)–visible measurements showed that gelatin films with nTA and CNC presented a lower chemical cross-linking and more noncovalent intermolecular interactions in comparison with those containing OTA. When compared to the film containing only nTA, the one with nTA and CNC presented substantial increases in the antioxidant capacity (52%), UV barrier (76%), tensile strength (79%), and water vapor barrier (67%) properties of gelatin. This evidence suggested that noncovalent interactions from nTA molecules and CNC play an important role in the modification of gelatin. The gelatin films designed with nTA and CNC also exhibited antimicrobial effects against Staphylococcus aureus and Escherichia coli. Overall, the incorporation of CNC and nTA as active components to gelatin films is a suitable approach for producing sustainable, multifunctional materials for food packaging and other applications

Eco-friendly gelatin films with rosin-grafted cellulose nanocrystals for antimicrobial packaging

We report on gelatin films incorporating rosin-grafted cellulose nanocrystals (r-CNCs), which fulfill the most relevant requirements for antimicrobial packaging applications. Transparent gelatin/r-CNCs bionanocomposite films (0.5–6 wt% r-CNCs) were obtained by solution casting and displayed high UV-barrier properties, which were superior to the most used plastic packaging films. The gelatin/r-CNCs films exhibited a moderate water vapor permeability (0.09 g mm/m2 h kPa), and high tensile strength (40 MPa) and Young's modulus (1.9 GPa). The r-CNCs were more efficient in improving the optical, water vapor barrier and tensile properties of gelatin films than conventional CNCs. Grafting of rosin on CNCs resulted in an antimicrobial nanocellulose that inhibited the growth of Staphylococcus aureus and Escherichia coli. The antibacterial properties of r-CNCs were sustained in the gelatin films, as demonstrated by agar diffusion tests and proof-of-principle experiments involving cheese storage. Overall, the incorporation of r-CNCs as active fillers in gelatin films is a suitable approach for producing novel eco-friendly, antimicrobial packaging materials.This research was made possible thanks to the facilities of the Laboratory of Pulp and Paper 479 Science and Graphic Arts (LGP2) that is part of the LabEx Tec 21 (Investissements d'Avenir - grant 480 agreement n°ANR-11-LABX-0030) and of PolyNat Carnot Institute (Investissements d'Avenir - 481 grant agreement n° ANR-16-CARN-0025- 0), and Plant Macromolecule Research Center 482 (CERMAV) for the support to this work. This study was financed in part by CNPq, SISNANO 26 483 (MCTI), FINEP, Embrapa AgroNano research network (Embrapa), Coordenação de 484 Aperfeiçoamento de Pessoal de Nível Superior - Brazil (CAPES) [Finance Code 001] and by the 485 São Paulo Research Foundation (FAPESP) [grant numbers 2016/03080-2, 2017/18725-2 and 486 2018/00278-2, 2018/10899-4, 2018/22214-6, 2018/18953-8]. We would like to thank Berthine 487 Khelifi , Cécile Sillard and Thierry Encinas from Grenoble Institute of Technology for their 488 expertise in providing SEM imaging, XPS and XRD analyses, respectively

Eco-friendly bionanocomposite films based on protein and functionalized cellulose nanocrystals for antimicrobial packaging

International audienc