Tamanho da semente de guaraná e sua influência na emergência e no vigor.

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Sistemas de produção de sementes de juta consorciada com milho para o município de Alenquer, Pará.

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Armazenamento de sementes de caupi em regiões fisiográficas do Estado do Pará.

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A FALÁCIA DA TEORIA DA ESCOLHA RACIONAL NO DIREITO ANTITRUSTE E AS CONTRIBUIÇÕES DA ECONOMIA COMPORTAMENTAL

O presente artigo explora as distorções causadas pela adoção, muitas vezes de forma acrítica, da teoria da escolha racional (rational choice theory) na análise antitruste. A partir dos ensinamentos da economia comportamental, expõe as limitações da teoria da escolha racional e propõe novas perspectivas e critérios que podem e devem ser incorporados ao Direito Concorrencial, tornando-o mais consentâneo com a realidade. Por fim, sem pretensão de esgotar o tema, apresenta algumas alternativas metodológicas para que a referida incorporação ocorra de forma segura e consistente com os propósitos da análise concorrencial. Nesse sentido, propõe que a economia comportamental torne-se ferramenta de análise antitruste, preferencialmente associada a estudos empíricos, no contexto da superação da crença de que as teorias econômicas devem sempre gerar pressupostos e previsões universais e da defesa da necessidade de uma análise antitruste mais empírica

Mechanistic insights into glycoside 3-oxidases involved in C-glycoside metabolism in soil microorganisms

Funding Information: We thank Diana Santos for preliminary data, Teresa Catarino with stopped-flow analysis, Tiago N. Cordeiro for help with Rosetta, Philippe Carpentier for support with krypton high-pressure experiments, Pedro Matias and Maximino Manzanera for valuable discussions. We thank the beamline staff at ESRF (Grenoble, France) and ALBA (Barcelona, Spain) for their support during the synchrotron data collection and Teresa Silva and Cristina Timóteo (Research Facilities, ITQB-NOVA) for technical assistance. The NMR data were acquired at CERMAX, ITQB-NOVA, Oeiras, Portugal, with equipment funded by FCT, project AAC 01/SAICT/2016. This work was supported by the Fundação para a Ciência e Tecnologia, Portugal, grants, 2022.02027.PTDC (L.O.M.), MOSTMICRO-ITQB (UIDB/04612/2020 and UIDP/04612/2020) (L.O.M. and M.R.V.), LS4FUTURE Associated Laboratory (LA/P/0087/2020) (L.O.M. and M.R.V.), PTDC/BII-BBF/29564/2017 (L.O.M.), UIDB/04326/2020, UIDP/043226/2020 and LA/P/0101/2020 (EPM) and FCT PhD fellowships 2020.07928 (A.T.), 2022.13872 (T.F.), and 2022.09426 (M.V.R.). B-Ligzymes (GA 824017) from the European Union’s Horizon 2020 Research and Innovation Program is also acknowledged for funding T.F. secondment at Zymvol and F.S. secondment at ITQB NOVA. L.M. and X.F.L. acknowledge PID2021-126897NB-I00 project and PRE2019-088412 fellowship, funded by MCIN/AEI/10.13039/501100011033/ FEDER, EU. Funding Information: We thank Diana Santos for preliminary data, Teresa Catarino with stopped-flow analysis, Tiago N. Cordeiro for help with Rosetta, Philippe Carpentier for support with krypton high-pressure experiments, Pedro Matias and Maximino Manzanera for valuable discussions. We thank the beamline staff at ESRF (Grenoble, France) and ALBA (Barcelona, Spain) for their support during the synchrotron data collection and Teresa Silva and Cristina Timóteo (Research Facilities, ITQB-NOVA) for technical assistance. The NMR data were acquired at CERMAX, ITQB-NOVA, Oeiras, Portugal, with equipment funded by FCT, project AAC 01/SAICT/2016. This work was supported by the Fundação para a Ciência e Tecnologia, Portugal, grants, 2022.02027.PTDC (L.O.M.), MOSTMICRO-ITQB (UIDB/04612/2020 and UIDP/04612/2020) (L.O.M. and M.R.V.), LS4FUTURE Associated Laboratory (LA/P/0087/2020) (L.O.M. and M.R.V.), PTDC/BII-BBF/29564/2017 (L.O.M.), UIDB/04326/2020, UIDP/043226/2020 and LA/P/0101/2020 (EPM) and FCT PhD fellowships 2020.07928 (A.T.), 2022.13872 (T.F.), and 2022.09426 (M.V.R.). B-Ligzymes (GA 824017) from the European Union’s Horizon 2020 Research and Innovation Program is also acknowledged for funding T.F. secondment at Zymvol and F.S. secondment at ITQB NOVA. L.M. and X.F.L. acknowledge PID2021-126897NB-I00 project and PRE2019-088412 fellowship, funded by MCIN/AEI/10.13039/501100011033/ FEDER, EU. Publisher Copyright: © 2023, The Author(s).C-glycosides are natural products with important biological activities but are recalcitrant to degradation. Glycoside 3-oxidases (G3Oxs) are recently identified bacterial flavo-oxidases from the glucose-methanol-coline (GMC) superfamily that catalyze the oxidation of C-glycosides with the concomitant reduction of O2 to H2O2. This oxidation is followed by C-C acid/base-assisted bond cleavage in two-step C-deglycosylation pathways. Soil and gut microorganisms have different oxidative enzymes, but the details of their catalytic mechanisms are largely unknown. Here, we report that PsG3Ox oxidizes at 50,000-fold higher specificity (k cat/Km) the glucose moiety of mangiferin to 3-keto-mangiferin than free D-glucose to 2-keto-glucose. Analysis of PsG3Ox X-ray crystal structures and PsG3Ox in complex with glucose and mangiferin, combined with mutagenesis and molecular dynamics simulations, reveal distinctive features in the topology surrounding the active site that favor catalytically competent conformational states suitable for recognition, stabilization, and oxidation of the glucose moiety of mangiferin. Furthermore, their distinction to pyranose 2-oxidases (P2Oxs) involved in wood decay and recycling is discussed from an evolutionary, structural, and functional viewpoint.publishersversionpublishe

Produtividade e qualidade fisiológica de sementes de caupi colhidas em diferentes épocas.

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