Brazilian Agricultural Research Corporation

Repository Open Access to Scientific Information from Embrapa
Not a member yet
    119280 research outputs found

    Modeling sugarcane development and growth within ECOSMOS .biophysical model.

    Get PDF
    Sugarcane plays an important role in electricity and sugar production and is a viable biofuel. Developing and optimizing a mechanism that can predict crop growth and yield at different spatiotemporal scales can promote the understanding of the effects of cultivation on the ecosystem, while providing options for optimizing management measures and improving the operational procedures of sugarcane growers. The main objective of this study is to integrate the sugarcane module into the ECOSystem MOdel Simulator (ECOSMOS) model and calibrate a parameter set for sugarcane genotypes groups (using different datasets); the model supports datasets that vary in complexity (from flux tower experiments to operational plots), while accounting for high genotype-byenvironment-by-management (GxExM) variability

    Brazilian National Network of Alternative Methods (RENAMA) 10th anniversary: meeting of the associated laboratories, may 2022.

    Get PDF
    The Brazilian National Network of Alternative Methods (RENAMA), which is linked to the Ministry of Science, Technology and Innovation, is currently comprised of 51 laboratories from CROs, academia, industry and government. RENAMA’s aim is to develop and validate new approach methodologies (NAMs), as well as train researchers and disseminate information on their use — thus reducing Brazilian, and consequently Latin American, dependence on external technology. Moreover, it promotes the adoption of NAMs by educators and trained researchers, as well as the implementation of good laboratory practice (GLP) and the use of certified products. The RENAMA network started its activities in 2012, and was originally comprised of three central laboratories — the National Institute of Metrology, Quality and Technology (INMETRO); the National Institute of Quality Control in Health (INCQS); and the National Brazilian Biosciences Laboratory (LNBio) — and ten associated laboratories. In 2022, RENAMA celebrated its 10th anniversary, a milestone commemorated by the organisation of a meeting attended by different stakeholders, including the RENAMA-associated laboratories, academia, non-governmental organisations and industry. Ninety-six participants attended the meeting, held on 26 May 2022 in Balneario Cambori ´ u, SC, Brazil, as part of the programme of the XXIII Brazilian Congress of Toxicology 2022. Signi ´ ficant moments of the RENAMA were remembered, and new goals and discussion themes were established. The lectures highlighted recent innovations in the toxicological sciences that have translated into the assessment of consumer product safety through the use of human-relevant NAMs instead of the use of existing animal-based approaches. The challenges and opportunities in accepting such practices for regulatory purposes were also presented and discussed

    Low-cost paper-based sensors modified with curcumin for the detection of ochratoxin a in beverages.

    Get PDF
    Ochratoxin A (OTA) is a mycotoxin that can contaminate food and is produced by fungal species such as Aspergillus carbonarius, Penicillium verrucosum, Aspergillus ochraceus, and Aspergillus niger [1]. OTA poses significant risks to both humans and animals, as it can cause mutagenic, carcinogenic, teratogenic, hemorrhagic, hepatotoxic, estrogenic, immunotoxic, dermatoxic, nephrotoxic, and neurotoxic effects [2–5]. Contamination with OTA can occur at various stages, including during cultivation, post-harvest, and transportation or storage of food produce. Commonly affected food items include dried fruits, cereals, nuts, corn, oats, coffee, grape juice, wine, wheat, and beer [6–9]. OTA is stable in most food-processing conditions, making it a persistent concern in the realm of food safety [4]. Consumption of OTA-contaminated food has emerged as a substantial public health issue that requires immediate attention. Currently, analytical methods such as enzyme-linked immunosorbent assay (ELISA) [10] and chromatographic assays [11] are employed to detect OTA and monitor food quality. However, these approaches are time-consuming and expensive and require sample preparation and trained personnel to operate the instruments. To address these limitations, alternative systems have been proposed, including electrochemical and optical sensors, which offer simpler procedures for detecting OTA traces [4]. Surface functionalization [5,12,13] can further enhance the performance of these sensors. Notably, paper-based sensors show great promise as they fulfill the requirements for point-of-attention food monitoring, are low-cost, portable, and versatile [14,15]. Additionally, functionalization can be accomplished using a wide range of raw, biodegradable materials [16–18]. In this study, we present an innovative paper-based sensor functionalized with curcumin for the optical and electrochemical detection of ochratoxin A (OTA), as illustrated in Scheme 1. Curcumin is a highly promising sensing element due to its affordability, widespread availability, non-toxicity, and pronounced fluorescence that is quenched in the presence of OTA [19–25]. Notably, curcumin also possesses redox-active properties, with two distinct redox centers: a β-diketone

    Berganês, a new sheep breed from the Brazilian semiarid: performance and carcass traits in different sex-classes by univariate and multivariate approaches.

    Get PDF
    Twenty-four lambs between four and five months of age were divided into sex classes: uncastrated males, castrated males and females, eight for each treatment, with an average body weight of 27.00 ± 3.13 kg. dry matter and water intakes were higher for uncastrated males (p < 0.001). final body weight, body weight at slaughter, average daily gain and cold carcass weight were greater for uncastrated, intermediate for castrated and lower for females (p < 0.05). hot and cold carcass yields were higher for castrated males and females, respectively. (p < 0.05). based on principal component analysis, twenty-five variables were selected out of thirty-two, in some of the seven principal components generated, summarizing 21.87% data dimension. Discriminant analysis identified greater discrimination power for body weight at slaughter, thorax width, thorax depth, fatness, dry matter intake and hot carcass weight. All lambs were classified into their respective sex classes. Therefore, uncastrated males have performed better than castrated ones and both showed higher performance than females. Females and castrated males showed higher carcass yield. Discriminant analysis indicated heterogeneity between sex classes

    Analysis of collaboration networks for scientific and technological research on passion Fruit.

    Get PDF
    As pesquisas sobre o maracujá são realizadas em diversas instituições ao redor do mundo e é de interesse do setor produtivo, da comunidade científica e dos gestores de ciência e tecnologia, conhecer a dinâmica da ciência por meio de estudos métricos das informações bibliográficas. O levantamento das publicações indexadas na Web of Science e na Base de Dados de Pesquisa Agropecuária da Embrapa (BDPA), os registros no Escritório Europeu de Patentes - Espacenet, as tecnologias e os projetos da Embrapa foram utilizados como indicadores para caracterizar as redes de pesquisa sobre os maracujás. Este estudo analisou a rede de coautoria e cocitação da produção científica, a força de conexão entre as instituições e o mapa de coocorrência de palavras-chave entre 2001 e 2020. Brasil, Estados Unidos, Colômbia e França tiveram as maiores redes de coautoria em Passifloraceaes. As instituições brasileiras em posição de destaque na análise das redes de coautoria e que produziram o maior número de publicações foram Embrapa, USP e Unicamp. Os principais temas estudados foram adsorção, antioxidante, clarificação, evolução, flavonoide, floração, crescimento e embriogênese somática. As patentes relacionadas ao uso do maracujá tiveram destaque entre 2015 e 2017 com foco na produção de alimentos, bebidas, cosméticos e medicamentos. O Brasil possui relevante produção bibliográfica e desenvolvimento tecnológico sobre o maracujá tanto para a comunidade acadêmica quanto para os produtores rurais. Estes resultados integram aspectos da atividade científica que poderão prospectar novos direcionamentos de pesquisa e tornar conhecidos o uso e a circulação da produção científica

    Articulação entre pares como estratégia para propor alteração de normativas e políticas públicas para que elas passem a contemplar os produtos agroecológicos.

    Get PDF
    Com o intuito de trocar experiências e buscar uma articulação entre agricultoras e agricultores que cultivam e/ou praticam extrativismo de jabuticaba (Plinia cauliflora), foram realizadas duas viagens de intercâmbio de experiências de cooperado(a)s da Cooperativa Mista de Produção e Comercialização Camponesa (COOPCAM) a Hidrolândia, GO, município conhecido por sua grande produção de jabuticabas, tanto em sistemas agroecológicos quanto convencionais

    Market access and agricultural diversification: an analysis of Brazilian municipalities.

    Get PDF
    This study explored how market access impacted the level of diversification in 5565 Brazilian municipalities from 2013 to 2021. We developed a regression model considering how variables related to market access and commercialization (storage, roads, distribution centers, commercialization credit, among others) affected a local (municipality level) diversification index


    Get PDF
    Sensores são amplamente utilizados em nosso dia a dia para detectar/perceber diferentes estímulos físicos (pressão, temperatura, aceleração, massa, campo magnético, etc.) e químicos (substâncias químicas de natureza orgânica ou inorgânica). Em essência, os sensores são dispositivos que convertem variações desses estímulos em um sinal mensurável. Perante um mundo cada vez mais conectado e digital, a demanda por dispositivos sensores vem crescendo ao longo dos anos devido ao seu papel promissor e significativo na sociedade moderna


    full texts


    metadata records
    Updated in last 30 days.
    Repository Open Access to Scientific Information from Embrapa is based in Brazil
    Access Repository Dashboard
    Do you manage Open Research Online? Become a CORE Member to access insider analytics, issue reports and manage access to outputs from your repository in the CORE Repository Dashboard! 👇