2 resultados para Algodões


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Desde o seu descobrimento, Cabo Verde, como porto marítimo de passagem obrigatória, revelou-se de grande importância para o comércio entre Europa e África. Daí se compreenda que a maior parte dos réditos do arquipélago provinham do trato africano. Foi igualmente durante o século XV que a cultura do algodão e a criação de cavalos germinaram no arquipélago como mercadorias internas, passiveis de exportação. Ancorado firmemente na documentação manuscrita e relatos do período, esta dissertação compreende uma análise da cultura algodoeira e da criação equídea em Cabo Verde desde a sua descoberta até 1535, com a finalidade de identificar os motivos do desenvolvimentos destas duas actividades no arquipélago, a evolução ao longo do tempo do comércio destas duas mercadorias compreender e a importância do sector agropecuário nas ilhas.

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In this work evaluate the technical characteristics of the fibers grown in settlements Guamaré, colored cotton seeds were donated existing in the Germplasm Bank of Embrapa Cotton. We sought through the breeding program, raising the resistance, fineness, length and uniformity of cotton fibers, as well as stabilize the staining of fibers in the BRS Topaz, BRS Brown and BRS Green shades and raise their productivity in the field. First, the individual selections to test progeny seeds, and thereafter the hybridization method followed by family selection to obtain variations in the color tones were performed. The BRS Topaz, BRS Brown and BRS Green varieties were produced, analyzed and compared with existing cottons in the region which is the White cotton. The properties amount of impurities and neps, length, length uniformity, short fiber content, fineness and tensile strength of the fibers were sized in Classifiber, NATI, Pressley and Micronaire devices. 10 trials each with 10 tests for all four fiber types were carried out. The White and Topaz fibers showed greater length (32-34mm) and greater resistance (7.94 lb/mg and 7.97 lb/mg respectively) and showed finesse with lower micronaire index 3,71μg/inch and 3, 73μg/inch and a low rate of short fibers. The results were very promising for the use of genetically improved cotton in the manufacturing of fabric and yarn in the textile industry. The fibers were brown colored cotton used in the manufacture of a composite fiber with thermoplastic resin