A pesquisa algodoeira no nordeste do Brasil.

Caracterizacao da producao de algodao na regiao setentrional do Brasil; Contribuicao da pesquisa e iniciativa privada a problematica do algodao do nordeste no passado; Desafios atuais; Acoes recentes da pesquisa com o algodao no nordeste; Sugestoes finais.bitstream/item/33264/1/A-PESQUISA-ALGODOEIRA.pd

Levantamento e avaliacao da qualidade de sementes de algodao, Gossypium hirsutum L. distribuidas aos agricultores de alguns Estados do nordeste do Brasil.

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Comportamento das cultivares de algodoeiro moco Gossypium hirsutum L.r. marie galante Hutch no Estado da Paraiba em 1978/1979.

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Visao retrospectiva do melhoramento genetico do algodoeiro moco (Gossypium hirsutum r. marie galante Hutch) no nordeste do Brasil.

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Paralytic Shellfish Toxins Occurrence in Non-Traditional Invertebrate Vectors from North Atlantic Waters (Azores, Madeira, and Morocco)

Paralytic shellfish toxins (PSTs) are potent alkaloids of microalgal and cyanobacterial origin, with worldwide distribution. Over the last 20 years, the number of poisoning incidents has declined as a result of the implementation of legislation and monitoring programs based on bivalves. In the summer of 2012 and 2013, we collected a total of 98 samples from 23 different species belonging to benthic and subtidal organisms, such as echinoderms, crustaceans, bivalves, and gastropods. The sampling locations were Madeira, São Miguel Island (Azores archipelago), and the northwestern coast of Morocco. The samples were analyzed using post-column oxidation liquid chromatography with a fluorescence detection method. Our main goal was to detect new vectors for these biotoxins. After reporting a total of 59 positive results for PSTs with 14 new vectors identified, we verified that some of the amounts exceeded the limit value established in the EU. These results suggest that routine monitoring of saxitoxin and its analogs should be extended to more potential vectors other than bivalves, including other edible organisms, for a better protection of public health.This research was partially funded by the Portuguese Fundation of Science and Technology (FCT) project UID/Multi/04423/2013 and by the projects ALERTOXNET (EAPA_317/2016), funded by the Interreg Atlantic program. The Spanish research leading to these results has received funding from the following European Fund for Economic and Regional Development (FEDER) cofunded-grants: Centro para el Desarrollo Tecnológico Industrial (CDTI) and Technological Funds, supported by Ministerio de Economía y Competitividad, AGL2012-40185-CO2-01, AGL2014-58210-R, and Consellería de Cultura, Educación e Ordenación Universitaria, GRC2013-016; CDTI under India&Spain Innovating Program (ISIP) Programme, Spain, IDI-20130304 APTAFOOD; the European Union’s Seventh Framework Programme managed by REA—Research Executive Agency (FP7/2007-2013) under grant agreement 312184 PHARMASEA. Acknowledment to project EMERTOX (grant 734748), funded by H2020-MSCA-RISE 2016

Maturacao e qualidade fisiologica de sementes de algodao, Gossypium hirsutum L. latifolium Hutch.

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Paralytic shellfish toxins occurrence in non-traditional invertebrate vectors from north Atlantic waters (Azores, Madeira, and Morocco)

Paralytic shellfish toxins (PSTs) are potent alkaloids of microalgal and cyanobacterial origin, with worldwide distribution. Over the last 20 years, the number of poisoning incidents has declined as a result of the implementation of legislation and monitoring programs based on bivalves. In the summer of 2012 and 2013, we collected a total of 98 samples from 23 different species belonging to benthic and subtidal organisms, such as echinoderms, crustaceans, bivalves, and gastropods. The sampling locations were Madeira, São Miguel Island (Azores archipelago), and the northwestern coast of Morocco. The samples were analyzed using post-column oxidation liquid chromatography with a fluorescence detection method. Our main goal was to detect new vectors for these biotoxins. After reporting a total of 59 positive results for PSTs with 14 new vectors identified, we verified that some of the amounts exceeded the limit value established in the EU. These results suggest that routine monitoring of saxitoxin and its analogs should be extended to more potential vectors other than bivalves, including other edible organisms, for a better protection of public health. © 2018 by the authors. Licensee MDPI, Basel, Switzerland.Department of Biology, Science Faculty, University of Porto, Rua do Campo Alegre, 4619-007 Porto, Portugal; [email protected] (A.B.); [email protected] (V.V.) Interdisciplinary Center of Marine and Environmental Research-CIMAR/CIIMAR, University of Porto, Novo Edificio do Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, 4450-208 S/N Matosinhos, Portugal; [email protected] Department of Analytical Chemistry, Science Faculty, University of Santiago de Compostela, 27002 Lugo, Spain; [email protected] (V.R.); [email protected] (A.B.) Life Sciences Faculty, Madeira University, Marine Biology Station, 9000-107 Funchal, Madeira Island, Portugal Center of Interdisciplinary Marine and Environmental Research of Madeira-CIIMAR-Madeira, Edificio Madeira Tecnopolo, Caminho da Penteada, 9020-105 Funchal, Madeira, Portugal cE3c/GBA—Centre for Ecology, Evolution and Environmental Changes/Azorean Biodiversity Group and Department of Biology, Faculty of Sciences and Technology, University of Azores, 9501-801 Ponta Delgada, São Miguel, Azores, Portugal; [email protected] Phycology Research Unit-Biotechnology, Ecosystems Ecology and Valorization Laboratory, Science Faculty, University of Chouaib Doukkali, El Jadida BP20, Morocco; [email protected] (M.H.); [email protected] (B.S.) Department of Pharmacology, Veterinary Faculty, University of Santiago de Compostela, 27002 Lugo, Spain; [email protected] Correspondence: [email protected]; Tel.: +351-2234-01800; Fax: +351-2233-80609 This authors contributed equally to this work. Funding: This research was partially funded by the Portuguese Fundation of Science and Technology (FCT) project UID/Multi/04423/2013 and by the projects ALERTOXNET (EAPA_317/2016), funded by the Interreg Atlantic program. The Spanish research leading to these results has received funding from the following European Fund for Economic and Regional Development (FEDER) cofunded-grants: Centro para el Desarrollo Tecnológico Industrial (CDTI) and Technological Funds, supported by Ministerio de Economía y Competitividad, AGL2012-40185-CO2-01, AGL2014-58210-R, and Consellería de Cultura, Educación e Ordenación Universitaria, GRC2013-016; CDTI under India&Spain Innovating Program (ISIP) Programme, Spain, IDI-20130304 APTAFOOD; the European Union’s Seventh Framework Programme managed by REA—Research Executive Agency (FP7/2007-2013) under grant agreement 312184 PHARMASEA

Micropropagação do abacaxizeiro em larga escala.

O laboratório de Biotecnologia da Embrapa Semi-Árido produziu mudas de abacaxi híbrido [Ananas comosus (L.) Merril], resultante do cruzamento entre as variedades Primavera e Roxo de Tefé, provenientes da Emepa-PB, objetivando avaliar sua micropropagação massal

Cultura do algodoeiro herbáceo no Nordeste do Brasil.

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Clar's Theory, STM Images, and Geometry of Graphene Nanoribbons

We show that Clar's theory of the aromatic sextet is a simple and powerful tool to predict the stability, the \pi-electron distribution, the geometry, the electronic/magnetic structure of graphene nanoribbons with different hydrogen edge terminations. We use density functional theory to obtain the equilibrium atomic positions, simulated scanning tunneling microscopy (STM) images, edge energies, band gaps, and edge-induced strains of graphene ribbons that we analyze in terms of Clar formulas. Based on their Clar representation, we propose a classification scheme for graphene ribbons that groups configurations with similar bond length alternations, STM patterns, and Raman spectra. Our simulations show how STM images and Raman spectra can be used to identify the type of edge termination