Atributos de calidad del aceite de café Arábica tostado extraído por prensado: composición, actividad antioxidante, factor de protección solar y otros parámetros físicos y químicos

This research reports a comprehensive characterization of the composition profile and physical and chemical characteristics of roasted Arabica coffee oil obtained by mechanical pressing. The oil presented a peroxide value of 3.21 meq·kg-1 and an acid value of 7.3 mg KOH·g-1. A higher proportion of unsaturated fatty acids (58%), predominantly linoleic (L) and palmitic (P) acids, was observed; PLL and PLP were estimated as the main triacylglycerols. The oil was characterized by high contents in diterpenes and tocopherols (3720 and 913 mg·100g-1, respectively), the presence of caffeine and chlorogenic acids, as well as a high sun protection factor (9.7) and ABTS free radical-scavenging capacity (12.5 mg Trolox·mL-1). Among the 35 volatile compounds studied, furfurythiol and pyrazines were the main components of the oil. These properties showed that roasted coffee oil has good potential for use in food and cosmetics.Esta investigación reporta una caracterización completa del perfil de composición y características físicas y químicas del aceite de café Arábica tostado obtenido por prensado mecánico. El aceite presentó un índice de peróxido de 3,21 meq·kg-1 y un índice de acidez de 7,3 mg de KOH·g-1. Se observó una mayor proporción de ácidos grasos insaturados (58%), ácido linoleico, (L) y palmítico (P); PLL y PLP se estimaron como los principales triacilgliceroles. El aceite se caracterizó por un alto contenido de diterpenos y tocoferoles (3720 y 913 mg·100g-1, respectivamente), la presencia de cafeína y ácidos clorogénicos, así como un alto factor de protección solar (9,7) y capacidad de captación de radicales libres ABTS (12,5 mg de Trolox·mL-1). Entre los 35 compuestos volátiles estudiados, el furfuritiol y las pirazinas fueron los componentes principales del aceite. Estas propiedades mostraron que el aceite de café tostado tiene un buen potencial para su uso en alimentos y cosméticos

Teores De Diterpenos Em Bebidas De Café Espresso Preparadas Com Cápsulas Comerciais

The objective of this work was to quantify kahweol and cafestol diterpenes in coffee brews prepared from commercial capsules for espresso in the Brazilian market. Four types of brews, with five preparation replications, were evaluated. The capsules had differences in the amount and type of roasted and ground coffees used (blends of arabica and robusta coffee or 100% arabica coffee), and in the conditions of time and volume of extraction (dose) recommended by the manufacturer. The coffee brews presented 1.42 and 4.88 g of solids/100 mL. Concentration of solids decreased with the increase in time/volume extraction. Contents of 0.47 to 1.04 mg of kahweol and 0.38 to 0.92 mg of cafestol by dose (ranging from 35 to 120 mL) were observed. These contents corresponded to a range of 0.40 to 2.96 mg of kahweol/100 mL and 0.32 to 2.62 mg of cafestol/100 mL. The fraction of diterpenes extracted varied from 1.85 to 4.27% for kahweol and 1.87 to 4.16% for cafestol. Considering the contents of cafestol, there is no indication of a hypercholesterolemic effect due to a moderate consumption of coffee brews prepared from these commercial capsules. © 2016, Editora UFLA. All rights reserved.11227628