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Effect of bisulfite addition on the chemical composition and cellular content fractions of dehydrated coffee pulp

by Murillo, B; Cabezas, M.T; Jarquín, R; Bressani, R.
Publisher: 1977Subject(s): SUBPRODUCTOS | PULPA | SECADO | PROCESAMIENTO | COMPOSICION | NITROGENO | CONTENIDO DE FIBRAS | PARED CELULAR | CELULOSA | LIGNINAS | BYPRODUCTS | DRYING | PROCESSING | NITROGEN | FIBRE CONTENT | CELL WALLS | CELLULOSE | LIGNINS | SOUS PRODUIT | SECHAGE | TRAITEMENT | AZOTE | TENEUR EN FIBRES | PAROI CELLULAIRE | CELLULOSE | LIGNINE In: Journal of Agricultural and Food Chemistry (EUA) v. 25(5) p. 1090-1092Summary: The effects of drying sulfite-treated coffee pulp by solar energy and drum drying were compared. Fresh coffee pulp was treated with 0.5, 1.0, 1.5, and 2.0 sodium metabisulfite and dried by either method. Proximate chemical composition did not reveal significant differences between dehydrating procedures. Sodium metabisulfite treatment resulted in a decrease in crude fiber, nitrogen cellular walls and cellulose, and an increase in ash and nitrogen-free extract. Likewise, tannins and cellular content were higher and lignin and lignified protein lower in metabisulfite-treated samples. Lignified protein was higher in sun-dehydrated pulp than in those samples dried by drum drying. The significance of these findings in terms of the digestibility of coffee pulp is discussed
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++25 ref. Sum. (En)

The effects of drying sulfite-treated coffee pulp by solar energy and drum drying were compared. Fresh coffee pulp was treated with 0.5, 1.0, 1.5, and 2.0 sodium metabisulfite and dried by either method. Proximate chemical composition did not reveal significant differences between dehydrating procedures. Sodium metabisulfite treatment resulted in a decrease in crude fiber, nitrogen cellular walls and cellulose, and an increase in ash and nitrogen-free extract. Likewise, tannins and cellular content were higher and lignin and lignified protein lower in metabisulfite-treated samples. Lignified protein was higher in sun-dehydrated pulp than in those samples dried by drum drying. The significance of these findings in terms of the digestibility of coffee pulp is discussed

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