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      Eficiência do processo de recobrimento de sementes de brócolos recobertas com polímero em leito de jorro Translated title: Coating process efficiency for polymer coated broccoli seeds in spouted bed

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          Abstract

          Neste trabalho, sementes de brócolos foram recobertas em leito de jorro cone-cilíndrico, com suspensão aquosa de hidroxietilcelulose, visando a aprimorar a técnica do recobrimento de sementes, utilizando o processo fluidodinâmico. Foram investigados os efeitos das variáveis operacionais temperatura do ar de jorro, pressão de ar de atomização e vazão de suspensão de recobrimento, na eficiência do processo e na germinação das sementes. Os resultados revelaram que houve influência das variáveis operacionais na eficiência do processo e na germinação. Verificou-se, também, que as sementes recobertas apresentaram de 2 a 10% de umidade a menos que as sementes não-recobertas, quando em ambiente com temperatura controlada e saturado de vapor de água em determinado período.

          Translated abstract

          Broccoli seeds were coated in a conical-cylindrical spouted bed with an aqueous suspension of hydroxy ethyl cellulose aiming to improve the seeds coating technique using a fluid-dynamic process. An experimental design was applied to investigate the effects of the operating variables: gas temperature, atomizing air pressure and suspension flow rate on the germination of the seeds and on the process efficiency. Results indicated that the operating variables affect both the coating process efficiency and the germination ability. However, the analysis didn’t identify differences between the germination potential of coated and uncoated seeds. Coated seeds absorbed up to 10 percent less moisture than the uncoated ones, when the environment temperature and humidity were controlled over a period of time.

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          Recobrimento de sementes

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            Regras de análise de sementes

            (1992)
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              Gas fluidization technology

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                Author and article information

                Contributors
                Role: ND
                Role: ND
                Journal
                eagri
                Engenharia Agrícola
                Eng. Agríc.
                Associação Brasileira de Engenharia Agrícola (Jaboticabal )
                1809-4430
                June 2008
                : 28
                : 2
                : 305-314
                Affiliations
                [1 ] Universidade Estadual de Campinas Brazil
                [2 ] Universidade Estadual de Campinas Brazil
                Article
                S0100-69162008000200011
                10.1590/S0100-69162008000200011
                a23773c3-9a34-4c76-9d65-53c203b4887d

                http://creativecommons.org/licenses/by/4.0/

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                SciELO Brazil

                Self URI (journal page): http://www.scielo.br/scielo.php?script=sci_serial&pid=0100-6916&lng=en
                Categories
                AGRICULTURAL ENGINEERING

                Agricultural engineering
                germination,hydroxy ethyl cellulose,Brassica oleracea,germinação,hidroxietilcelulose

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