Análise da correção atmosférica de imagens Landsat em estudo multitemporal na região de Mata Atlântica, Estado do Rio de Janeiro.

Multitemporal, remotely sensed data applied to land use land cover dynamic studies require radiometric correction of images, in addition to geometric correction. This allow the analysis of temporal variation of targets without the influence of others factors such as the atmospheric effects. This study aims to apply the dark-object subtraction technique to correct atmospheric effects and to analyze the results on multitemporal images of rivers Macacu and Caceribu watersheds, in Rio de Janeiro state, in Atlantic Forest region. Images without clouds from sensors TM/Landsat-5 and ETM+/Landsat-7 were selected for analysis of land use land cover dynamic of two periods: 1997 to 2002 and 2002 to 2007. The results indicated that the correction method did not reduce the atmospheric effects in a satisfactory manner. These effects continued to influence in any significant way in the spectral response of the targets. The major differences between the levels of gray of the corrected images were among the images of different sensors, indicating likely influence of the response of the sensors on the final results. o objetivo do presente trabalho é analisar o efeito da correção atmosférica aplicando método de subtração de nível de ci nza em imagens multitemporais da região das bacias hidrográficas dos rios Macacu e Caceribu, no Estado do Rio de Janeiro, em região de Mata Atlântica

Electrochemical degradation of the chloramphenicol at flow reactor

This paper reports a study of electrochemical degradation of the chloramphenicol antibiotic in aqueous medium using a flow-by reactor with DSA® anode. The process efficiency was monitored by chloramphenicol concentration analysis with liquid chromatography (HPLC) during the experiments. Analysis of Total Organic Carbon (TOC) was performed to estimate the degradation degree and Ion Chromatography (IC) was performed to determinate inorganic ions formed during the eletrochemical degradation process. In electrochemical flow-by reactor, 52% of chloramphenicol was degraded, with 12% TOC reduction. IC analysis showed the production of chloride ions (25 mg L-1), nitrate ions (6 mg L-1) and nitrite ions (4.5 mg L-1).Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP

Evaluation of the Pinus taeda quality using ultrasound.

IUS2-PB1-1

Validation of photographs usage to evaluate meat visual acceptability of young bulls finished in feedlot fed with or without essential oils

Forty ½ Brown Swiss × ½ Nellore crossbred bulls were distributed into three experimental groups: CON – diet without addition of essential oils; CLO – diet with average 5, 000 mg/animal/day of clove essential oils and CIN – diet with average 5, 000 mg/animal/day of cinnamon essential oils to evaluate three methodologies of visual acceptability: with steaks directly in Trays and Sequential and Random photos. Seventeen consumers evaluated visual appearance of meat using a 9-point structured hedonic scale. CON group presented higher shelf-life than essential oils groups. Trays and Sequential scores were similar in the majority of days; thus digital images could be used to evaluate colour evolution. However, Random photos resulted in lower scores and slower acceptability decrease than Trays and Sequential photos (p < 0.05) among the second and fifth day of display. Random photos presented a lower and more constant standard deviation than Trays and Sequential photos (p < 0.01) indicating that this methodology promoted a higher standard situation for meat colour evaluation

PSA Hidrico Web: um sistema de apoio a programas de pagamento para serviços ambientais hídricos no Brasil.

Resumo: Programas para Pagamento de Serviços Ambientais (PSA) têm aumentado no âmbito das políticas ambientais por seu objetivo de manutenção de ecossistemas, ao mesmo tempo que provêem melhorias ao rendimento dos agricultores em áreas rurais. No Brasil, os programas de PSA relacionados à água tiveram um crescimento notável, apesar da falta de metodologias de avaliação dessas iniciativas. A fim de ajudar esses projetos no alcance de seus objetivos, um grupo multi-institucional propôs um projeto para pesquisa, organização e análise de metodologias de acompanhamento, avaliação e de apoio à decisão em projetos relacionados ao uso de água. Uma revisão bibliográfica mostrou grande diversidade de abordagens em metodologias, indicadores e projetos de PSA. A organização desse crescente conjunto de dados requer um sistema de informação geográfica apoiado por um banco de dados que assegure a consistência e a integridade da informação, mas também permita o acesso inteligente à informação disponível. Nesse contexto, desenvolveu-se o sistema PSA Hídrico Web, visando facilitar a entrada de dados, bem como realizar consultas importantes sobre a informação teórica ou experimental existente, geográfica ou não, relacionada a PSA, funcionando como ferramenta de apoio a decisões sobre o uso de recursos hídricos no país. Dentre as fontes de dados estão publicações indexadas e informações de projetos da Agência Nacional de Águas (ANA) e da ONG The Nature Conservancy (TNC). O sistema visa proporcionar um meio de fácil acesso para difundir, incrementar e melhorar a adoção e a prática de processos e metodologias em PSA relacionados aos serviços hídricosGeoPantanal 2016

Comportamento espectral de fitofisionomias do Cerrado e desenvolvimento de índices utilizando bandas sintéticas derivadas de Modelos Lineares de Mistura Espectral aplicados na discriminação de fitofisionomias.

ABSTRACT - The Cerrado biome covers more than two million km² in the central region of Brazil. It is the second largest biome in this country, presenting rich biodiversity. Remote sensing is a useful tool for characterizing land covers. However, because of its particularities and vegetation diversity, Cerrado is not easily distinguishable in optical images. So the use of remote sensing for discriminating Cerrado vegetation requires an investigation of the behavior of their spectral characteristics. This paper analyzes the behavior of vegetation cover in the Cerrado biome through the Landsat5/TM spectral bands and the corresponding synthetic bands derived from mixing models. It also seeks the ways to facilitate the discrimination of the vegetation type classes by defining specific indices using remote sensing tools. The Brasília National Park was chosen as the study area for this research. The methodology used the Linear Spectral Mixture Model applied to two sets of endmembers (green vegetation, bare soil and shade; and green vegetation, dry vegetation and shade) to generate the corresponding fraction images (synthetic bands), which could discriminate the vegetation classes of interest. The use of dry vegetation as one of the endmembers showed more promising results than the use of bare soil for distinguishing Cerrado?s phytophysiognomies