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| Baptestini, Fernanda Machado; Corrêa, Paulo Cesar; Oliveira, Gabriel Henrique Horta de; Cecon, Paulo Roberto; Soares, Nilda de Fátima Ferreira. |
| The objective of this study was to model the kinetics of water sorption in roasted and ground coffee. Crude Arabica coffee beans with an initial moisture content of 0.1234 kgwkgdm-1 were used. These beans were roasted to a medium roast level (SCCA # 55) and ground at three particle sizes: coarse (1.19 mm), medium (0.84 mm) and fine (0.59 mm). To obtain the water sorption isotherms and the isosteric heat, different conditions of temperature and relative humidity were analyzed using the dynamic method at 25ºC (0.50, 0.60, 0.70, and 0.80 of RH) and 30°C (0.30, 0.40, 0.50, 0.60, 0.70, and 0.80 of RH) and using the static method at 25ºC (0.332 and 0.438 of RH). The GAB model best represented the hygroscopic equilibrium of roasted coffee at every particle size.... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Particle size; Specific surface; Isosteric heat. |
| Ano: 2017 |
URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/32576 |
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| Baptestini, Fernanda Machado; Corrêa, Paulo Cesar; Paixão, Aline Almeida da; Oliveira, Gabriel Henrique Horta de. |
| The objective of this study was to evaluate the use of carnauba-based wax to preserve the quality of bean grains. Three lots of beans of 25 kg each were used. The first remained without carnauba wax (treatment 0), the second with carnauba wax diluted with water in a 1:1 proportion (treatment 1), and carnauba wax without dilution (treatment 2). Sensory analysis, color, cooking time, absorption capacity, and insect-plague infestation were performed during 8 months of storage. Carnauba wax does not compromise the sensorial quality and color of the beans. Thus, it can be used without interfering with the products acceptance by the consumer. Carnauba wax did not prevent the hard-to-cook damage, which the consumer associates with a longer period of cooking time.... |
| Tipo: Info:eu-repo/semantics/article |
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| Ano: 2024 |
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/8193 |
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