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Condutividade elétrica do exsudato de grãos de café (Coffea arábica l.) II efeito do grau de umidade e do tamanho dos grãos
Author(s) -
Cássio Egídio Cavenaghi Prete,
Jairo Teixeira Mendes Abraão
Publication year - 1996
Publication title -
semina. ciências agrárias
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.268
H-Index - 25
eISSN - 1679-0359
pISSN - 1676-546X
DOI - 10.5433/1679-0359.1996v17n1p18
Subject(s) - coffea arabica , moisture , water content , horticulture , mathematics , zoology , materials science , composite material , biology , geotechnical engineering , engineering
Para estudar a influência do grau de umidade e do tamanho dos grãos de café sobre sua condutividade elétrica foram realizados dois experimentos no Departamento de Agricultura da Escola Superior de Agricultura Luiz de Queiroz. Foram obtidos 07 tratamentos para classes de tamanho ou peneiras (pen. 18, 17, lote original, 16, moka 10, 15 e 14), os quais não diferiram estatisticamente entre si, quando avaliado, sua condutividade elétrica após 3,5 horas de embebição. Foram obtidos 05 diferentes teores de água, sendo 10,28%, 8,97%, 8,92%, 7,02% e 6,85% para o cv. Mundo Novo, e 10,99%, 8,06%, 8,10%, 7,23%= e 7,09% para o cv. Catuai. Verificou-se que a condutividade elétrica foi significativamente maior nos tratamentos com teores de água menores que 8% b.u.    In order to study the influence of moistures levels and beans size on coffee electrical conductivity two experiments were conducted at the ESALO Agricultural Department. Seven treatments were made with sieves 18, 17, not classified, 16 moka 10, 15 and 14, every one concerning its own grain size. None of those treatments were statistically different when their electrical conductivity was evaluated, three and a half'hours later embibed. Five different water contents and, consequently, five different moisture levels were obtained from c.v. Catuai (10,99%, 8,06%, 8,10%, 7,23% and 7,09%) and c.v. Mundo Novo (10,28%,, 8,97%, 8,92%,, 7,02% and 6,85%) where it was verified that the electrical condutivity was greater, on water treatments with less than 8% of moisture.

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