Evaluation of operational parameters on the precipitation of endoglucanase and xylanase produced by solid state fermentation of Aspergillus niger

In order to develop cost effective processes for converting biomass into biofuels, it is essential to improve enzyme production yields, stability and specific activity. In this context, the aim of this work was to evaluate the concentration of two enzymes involved in the hydrolysis of biomass, endoglucanase and xylanase, through precipitation. Statistical experimental design was used to evaluate the influence of precipitant agent concentration (ammonium sulfate and ethanol), aging time, and temperature on enzyme activity recovery. Precipitant agent concentration and aging time showed a statistically significant effect at the 95% confidence level, on both enzyme activity recoveries. The recovery of endoglucanase with ammonium sulfate and ethanol reached values up to 65 and 61%, respectively. For xylanase, the recovery rates were lower, 27 and 25% with ammonium sulfate and ethanol, respectively. The results obtained allowed the selection of the variables relevant to improving enzyme activity recovery within operational conditions suitable for industrial applications.1726Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq

TRAUMA, REABILITAÇÃO E QUALIDADE DE VIDA

This article presents a review of the literature, based on articles published from July, 2002 until May, 2007. It aims to analyze questions related to different types of traumas and their relationships with the rehabilitation programs and quality of life. This review was realized through a search into the international databases Medline,Scielo and Lilacs.The selected articleswere divided in four categories, in two different axis of analysis, based in the International Classification of Functionality: 1. structures and functions of the body (medical-surgical and functional aspects, and validation of protocols) and 2. Activities and social participation (psychosocial aspects). Finally, ahead of the changes related with trauma and based in the results and discussion that the articles presented, we emphasize the importance of the multidisciplinary work of the rehabilitation team, in particular the contribution of the occupational therapy, and the necessity of quality of life promotion of these populations in the physical aspects, as well in emotional, social and familiar.Este trabalho apresenta uma revisão da literatura, baseada em artigos publicados no período de julho de 2002 a maio de 2007. Procuramos analisar questões referentes a diversos tipos de traumas e suas relações com os programas de reabilitação e qualidade de vida. A revisão foi realizada a partir da consulta às bases de dados internacionais Medline, Scielo e Lilacs e os artigos selecionados foram divididos em quatro categorias, dentro de dois eixos de análise, baseados na Classificação Internacional de Funcionalidade . 1. estruturas e funções do corpo, (aspectos clínico-cirúrgicos e funcionais e validação de protocolos) e 2. atividades e participação social (aspectos psicossociais). Por fim, diante das mudanças decorrentes do trauma e baseados nos resultados e discussões que os artigos apresentam, enfatizamos a importância do trabalho multidisciplinar da equipe de reabilitação, em particular a contribuição da Terapia Ocupacional, e a necessidade de promoção da qualidade de vida destas populações, tanto nos aspectos físicos, como emocionais e sócio-familiar

The Global Alliance for Infections in Surgery : defining a model for antimicrobial stewardship-results from an international cross-sectional survey

Background: Antimicrobial Stewardship Programs (ASPs) have been promoted to optimize antimicrobial usage and patient outcomes, and to reduce the emergence of antimicrobial-resistant organisms. However, the best strategies for an ASP are not definitively established and are likely to vary based on local culture, policy, and routine clinical practice, and probably limited resources in middle-income countries. The aim of this study is to evaluate structures and resources of antimicrobial stewardship teams (ASTs) in surgical departments from different regions of the world. Methods: A cross-sectional web-based survey was conducted in 2016 on 173 physicians who participated in the AGORA (Antimicrobials: A Global Alliance for Optimizing their Rational Use in Intra-Abdominal Infections) project and on 658 international experts in the fields of ASPs, infection control, and infections in surgery. Results: The response rate was 19.4%. One hundred fifty-six (98.7%) participants stated their hospital had a multidisciplinary AST. The median number of physicians working inside the team was five [interquartile range 4-6]. An infectious disease specialist, a microbiologist and an infection control specialist were, respectively, present in 80.1, 76.3, and 67.9% of the ASTs. A surgeon was a component in 59.0% of cases and was significantly more likely to be present in university hospitals (89.5%, p <0.05) compared to community teaching (83.3%) and community hospitals (66.7%). Protocols for pre-operative prophylaxis and for antimicrobial treatment of surgical infections were respectively implemented in 96.2 and 82.3% of the hospitals. The majority of the surgical departments implemented both persuasive and restrictive interventions (72.8%). The most common types of interventions in surgical departments were dissemination of educational materials (62.5%), expert approval (61.0%), audit and feedback (55.1%), educational outreach (53.7%), and compulsory order forms (51.5%). Conclusion: The survey showed a heterogeneous organization of ASPs worldwide, demonstrating the necessity of a multidisciplinary and collaborative approach in the battle against antimicrobial resistance in surgical infections, and the importance of educational efforts towards this goal.Peer reviewe

Maio amarelo: um movimento ativo para prevenir lesões no trânsito

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Evaluation of operational parameters on the precipitation of endoglucanase and xylanase produced by solid state fermentation of Aspergillus niger

In order to develop cost effective processes for converting biomass into biofuels, it is essential to improve enzyme production yields, stability and specific activity. In this context, the aim of this work was to evaluate the concentration of two enzymes involved in the hydrolysis of biomass, endoglucanase and xylanase, through precipitation. Statistical experimental design was used to evaluate the influence of precipitant agent concentration (ammonium sulfate and ethanol), aging time, and temperature on enzyme activity recovery. Precipitant agent concentration and aging time showed a statistically significant effect at the 95% confidence level, on both enzyme activity recoveries. The recovery of endoglucanase with ammonium sulfate and ethanol reached values up to 65 and 61%, respectively. For xylanase, the recovery rates were lower, 27 and 25% with ammonium sulfate and ethanol, respectively. The results obtained allowed the selection of the variables relevant to improving enzyme activity recovery within operational conditions suitable for industrial applications