[en] Green Coffee Products (GCP) consumption have been increased recently and is justified due its benefits to human health, as the antioxidant activity and thermogenic properties and ant mutagenic and ant carcinogenic capacity and also present alleged weight loss control. The aim this work was to elaborate a GCP with Coffea canephora by spray drying and compare its antioxidant capacity to commercial GCP samples by ORAC methodology. The results presented a range of 33.02 – 2,408.05 μmol Trolox/g for commercial products and 1,861.91 μmol Trolox/g for the product obtained in this work. (Author)

No abstract available

[en] The aim of this work was determine the sorption isotherms in roasted beans of specialty coffee at temperatures of 25, 30 and 40 °C and water activities between 0.1 and 0.8 using the dynamic dew point method. The experimental sorption data were modeled using 12 different equations to represent the dependence of equilibrium moisture content with aw and temperature. The net isosteric heat of sorption was determined from the experimental sorption data using the Clausius-Clapeyron equation. The Weibull model satisfactorily modeled the effect of the temperature on the hygroscopic equilibrium in roasted coffee beans (R2 adj=0.902 and RMSE = 0.00550 kg A78F kg-1d.b.). The net isosteric heat of sorption increase with increased moisture content. (Author)

[en] Published in summary form only

[en] The EA-IRMS technique was employed in this investigation to determine the stable isotope composition of δ¹³C in green coffee beans. The validity of this analytical method was evaluated using caffeine reference samples (USGS61, USGS 62, and USGS 63). Caffeine standard sample analytical results are very repeatable and accurate, with less than 1% bias. Some green coffee bean samples from Vietnam (Lam Dong, Dak Lak, and Dien Bien) differ from coffee from other countries in terms of the stable isotope composition of δ¹³C. (author)

No abstract available

No abstract available

[en] Six medium and dark roast coffeesand its groundsand one non-roastcoffee samples in solid statefrom theone of coffee shops in Ulaanbaatar city were studied by the EPR spectroscopy. Singlet, low intensitybut broad(16-17 Gs)EPR spectrum was registered near the 3400 Gs magnetic field from the all samples.Free radical concentrationwas evaluated about 1016spinwhich can be a measure of antioxidative property. (author)

[en] Coffee drying and roasting are usually performed in rotated dryers; therefore, the study of particle dynamics in this equipment is of great relevance to improve their efficiency and hence the quality of the final product. Thus, this work aimed to investigate experimentally and numerically the dynamics of coffee beans in a rotary dryer. The Euler-Euler model was employed to reproduce the particle velocity profile in the rolling regime under different boundary conditions. The results shown that the lower specularity coefficient (0.01), which characterizes the smooth wall and free slip condition, reproduced the bed behavior that most resembled the experimental one. On the other hand, the other coefficients (0.1 and 1.0) showed an increasing deformation in the bed surface, different from the observed experimental behavior. It was also verified that, as the filling degree increases, the bed surface deformation becomes more pronounced. (Author)

[en] Highlights: • General information provision about eco-friendly coffee stimulates purchase. • Its impact is diminished by controlling the association with consumer’ demographics. • Verbal information provision increases sales in environmentally conscious areas. • There was no significant association with socioeconomic status of consumers. This study investigates the effect of the provision of information about environmentally friendly coffee on consumers’ actual purchasing behavior, focusing on the association of information provision with consumers’ environmentally conscious and socioeconomic status (education, income, and unemployment). A unique aspect of this study is that we utilized a dataset from a nationwide social experiment in Japan involving more than 10,000 vending machines serving brewed coffee. Although we found that in general, informing consumers about the product’s eco-friendliness stimulated consumers’ purchasing behavior, its significance was diminished after controlling the association between the information provision and consumers’ characteristics. In contrast, the sales of eco-friendly coffee significantly increased only when we provided verbal information to consumers in highly environmentally conscious regions, while there was no significant association with consumers’ socioeconomic status.