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Phenolic and furanic compounds of Portuguese chestnut and French, American and ...
Garcia, Raquel; Soares, Bruno; Barrocas Dias, Cristina; Ana Maria, Costa Freitas; Cabrita, Maria JoaoBotanical species used on aging process must be wisely and judiciously chosen, and for this selection, a basic knowledge of the chemical composition of woods is warranted. Aiming to contribute to extend the knowledge of the chemical composition of several wood species useful for enological purposes, we have focused our studies on Portuguese chestnut and French, American and Portuguese oak chips. The profile of ...
Extracting natural dyes from wool—an evaluation of extraction methods
Manhita, Ana; Ferreira, Teresa; Candeias, António; Barrocas Dias, CristinaThe efficiency of eight different procedures used for the extraction of natural dyes was evaluated using contemporary wool samples dyed with cochineal, madder, woad, weld, brazilwood and logwood. Comparison was made based on the LC-DAD peak areas of the natural dye’s main components which had been extracted from the wool samples. Among the tested methods, an extraction procedure with Na2EDTA in water/DMF (1:1, ...
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