Estimativa do potencial de conversão energética de resíduos sólidos urbanos através do processo de incineração

Este trabalho tem como objetivo estimar o potencial de conversão energética dos resíduos sólidos urbanos gerados no município de Santo André, em São Paulo, Brasil, através do processo de incineração utilizando coeficientes técnicos disponíveis na literatura. Para isso foi necessário estimar o poder calorifico inferior dos resíduos. Para estimar o poder calorifico inferior foram utilizados vários modelos matemáticos empíricos com base nos dados da composição dos resíduos sólidos urbanos. O valor do poder calorifico inferior estimado foi de (10,60 ± 1,65) MJ/kg. A potência elétrica estimada para o ano de 2015 foi de 18,24 ± 2,84 e 19,46 ± 3,03 para o ano de 2020. Concluímos que é possível recuperar aproximadamente 28 % da energia contida nos resíduos sólidos urbanos. Os materiais plásticos, papel e papelão juntos contribuem com 60 % do valor do poder calorifico inferior. Estes materiais determinam a viabilidade do processo de incineração dos resíduos sólidos urbanos.This paper aims to estimate the potential for energy conversion of municipal solid waste generated in the municipality of Santo André, São Paulo, Brazil, through the incineration process using technical coefficients available in the literature. For it was necessary to estimate the lower calorific value of the waste. To estimate the lower calorific several empirical data based on the composition of MSW (municipal solid waste) mathematical models were used. The estimated value of the lower calorific value was (10.60 ± 1.65) MJ/kg. The estimate for the year 2015 electric power was 18.24 ± 2.84 and 19.46 ± 3.03 for the year 2020. Conclude that it is possible to recover approximately 28% of the energy contained in municipal waste. The plastic materials, paper and cardboard together contribute to 60% of the lower heating value. These materials determine the viability of the incineration process of municipal solid waste.Asociación Argentina de Energías Renovables y Medio Ambiente (ASADES

Antimicrobial resistance profile of Aeromonas spp. isolated from asymptomatic Colossoma macropomum cultured in the Amazonas State, Brazil.

Bacterial diseases are important factors that limit productivity in aquaculture. To reduce negative economic impacts, fish farmers use antimicrobials, often indiscriminately, and this action has led to bacterial resistance to drugs. The objectives of this study were to isolate and identify the main putative pathogenic bacterial species in tambaqui (Colossoma macropomum), establish the profile of resistance to antimicrobials by the methods of disc diffusion, and determine the minimum inhibitory concentration (MIC) values. Two hundred and ninety asymptomatic fish were collected between March and November 2015 from ten fish farms in the Amazonas state (Brazil). As doenças bacterianas são fatores importantes que limitam a produtividade na aquicultura. Para reduzir os impactos econômicos negativos, os piscicultores utilizam antimicrobianos, muitas vezes de forma indiscriminada, e essa ação tem levado à resistência bacteriana aos medicamentos. Os objetivos deste estudo foram isolar e identificar as principais bactérias com potencial putativo para o tambaqui (Colossoma macropomum), e estabelecer o perfil de resistência a antimicrobianos pelos métodos de difusão em disco e valores de concentração inibitória mínima (CIM).Título em Português: Perfil de resistência antimicrobiana de Aeromonas spp. isoladas de Colossoma macropomum assintomáticos no Estado do Amazonas, Brasil

Challenges in spintronic platforms for biomedical applications

Integrated spintronic biochip platforms are being developed for portable, point-of-care, diagnostic and cytometric applications [1,2]. Hybrid systems incorporating magnetoresistive sensors are applied to neuroelectronic studies and biomedical imaging, namely magnetoencephalography and magnetocardiography. Lab-on-a-chip MR-based platforms are under development to perform biological studies at the single molecule level. This review introduces and discusses the potential and main characteristics of those MR-based biomedical devices, comparing to the existing technologies, while giving particular examples of targeted applications. Applications to the detection of DNA hybridization events (DNA-chips) [3] and antibody-antigen recognition at immunoassays (immuno-chips) [4] are discussed. Particular examples for cell free DNA and genomic sequences detection, for pathogen (Salmonella enteritidis, see Fig.1) detection and for flow cytometry (separation and counting) of CD34+ magnetically labeled cells coming from bone marrow or cord blood samples are given. Moreover, lateral immuno-assay configurations where analytes are labeled with magnetic nanoparticles are discussed. For biomedical imaging applications, field sensitivity is being pushed towards 1pT/sqrt(Hz) and below in hybrid devices incorporating flux guides with the magnetoresistive element allowing the direct detection of bio-magnetic fields (from brain and heart). For neuroelectronic applications, sensors are being incorporated in microelectrode arrays (Si and polyimide) to record spontaneous or stimulated neural activity (in vitro and in vivo, see Fig.2)