Biblioteca do Café
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Item Instant coffee: Products and packaging systems characteristics(Universidade Federal de Lavras, 2023-12-15) Souza, Raquel Massulo; Moreira, Christiane Quartaroli; Alves, Rosa Maria VercelinoThe moisture gain cause instant coffee quality loss. In Brazil, these products are marketed in glass jars, with seals and screw caps, metal cans with easy-open lid and LDPE (low density polyethylene) over cap and flexible plastic packaging of multilayer film: PET (polyethylene terephthalate)/Al (aluminum) foil/LDPE. The aim of this study was to evaluate three types of instant coffees (freeze-dried, spray-dried agglomerated and powder) and their packages regarding to water activity, initial moisture, thermal analysis and moisture sorption isotherm, as well as some characteristics of the packaging systems - gas composition of the headspace, oxygen and water vapor transmission rate. All instant coffees evaluated presented similar characteristics of quality standard described in international literature. Products showed quality loss appearance with 10%-12% (d.b.) moisture content. Packaging systems presented oxygen transmission rate values greater than 1.000mL (STP)m-2.day-1 and water vapor transmission rate values less than 0.017g of water.package-1.day-1 (25°C/75%RH) and 0.048g of water.package-1.day-1 (38°C/90%RH).Item Instant coffee: Products and packaging systems characteristics(Universidade Federal de Lavras, 2023-12-15) Souza, Raquel Massulo; Moreira, Christiane Quartaroli; Alves, Rosa Maria VercelinoThe moisture gain cause instant coffee quality loss. In Brazil, these products are marketed in glass jars, with seals and screw caps, metal cans with easy-open lid and LDPE (low density polyethylene) over cap and flexible plastic packaging of multilayer film: PET (polyethylene terephthalate)/Al (aluminum) foil/LDPE. The aim of this study was to evaluate three types of instant coffees (freeze-dried, spray-dried agglomerated and powder) and their packages regarding to water activity, initial moisture, thermal analysis and moisture sorption isotherm, as well as some characteristics of the packaging systems - gas composition of the headspace, oxygen and water vapor transmission rate. All instant coffees evaluated presented similar characteristics of quality standard described in international literature. Products showed quality loss appearance with 10%-12% (d.b.) moisture content. Packaging systems presented oxygen transmission rate values greater than 1.000mL (STP)m-2.day-1 and water vapor transmission rate values less than 0.017g of water.package-1.day-1 (25°C/75%RH) and 0.048g of water.package-1.day-1 (38°C/90%RHItem Influência de fatores extrínsecos ao produto no julgamento hedônico e percepção de sabor de cafés especiais(Universidade Federal de Lavras, 2020-05-26) Sousa, Maísa Mancini Matioli de; Pereira, Rosemary Gualberto Fonseca Alvarenga; Carvalho, Fabiana Mesquita de; Leme, Paulo Henrique Montagnana VicenteThe multisensory attributes of the packaging of a food product create sensory and hedonic expectations and its main focus is to attract the consumers‘ attention. The various elements and characteristcs contained in the packaging may affect the selection and/or judgment of the product. In this way, two studies were carried out: the first aimed to assess whether the colour and/or shape of the design elements on the labels of specialty coffee packaging would influence the sensory and hedonic judgments by amateur consumers; and the objective of the second study was to investigate whether the typeface of packaging labels on specialty coffee would influence the sensory and hedonic judgments by amateur consumers. In the two experiments, the participants first evaluated their expectations of coffee acidity and sweetness only by looking at the labels on the coffee package. Subsenquently, they rated their experiences of the same attributes when tasting a cup of coffee, in addition to rating their liking and purchase intent. In each study, the same coffee was served to all participants. Both followed a between-subjects experimental design, that is, each participant assesed only a single coffee packaging and the data were analysed using multivariate analysis of variance (MANOVA). In the first experiment a 2 × 2 factorial design was used, for the evaluation of four different types of labels (green or pink, round or angular). For the second experiment, two different types of labels were developed, varying between roundness and angularity of typeface. The results of study I demonstrated that both colour and shape significantly affected consumers' sensory expectations, but had no significant effect after tasting on sensory rating regarding the specialty coffee. It was also observed that the interactions between colour × shape affected the hedonic measures, since the coffee associated with the congruent label (angular/green and round/pink) received higher liking and purchase intent ratings than the coffee associated with incongruent label (angular/pink and round/green). In study II, it was observed that the angular typeface increased expectation and perception of the coffee acidity, as well purchase intent ratings. However, contrary to the frequently suggested correspondence between sweetness and roundness, no association was found between the round typeface and sweet taste ratings. Therefore, these results demonstrate the importance of the visual attributes of packaging to define sensory expectations and affect the perception of specialty coffees.Item Cold coffee beverages extracted by cold and hot methods: composition and sensory acceptance by youngers(Editora UFLA, 2021) Violin, João Leonardo; Acre, Lucas Bonfanti; Francisco, Julyene Silva; Mori, André Luiz Buzzo; Benassi, Marta de ToledoBrazil is the second largest coffee consumer in the world, however, the participation of the young public in this market is not very expressive. The objective of this study was to evaluate the impact of non-sensory (packaging color, information, and images) and brewing methods (hot or cold extraction) on the acceptance of cold coffee beverages by young consumers. A coffee:water ratio of 1:10 (w:v) and infusion during 4 min and 24 h was used for both hot and cold extractions, respectively. Hot extraction was performed at 95 °C, then cooled in a refrigerator and served at 6 to 10 °C, the same temperature that the cold extraction was performed and served. The beverages were characterized by composition and extraction yield. The packaging of the beverages was designed aiming to appeal to the young Brazilian public (15 to 24 years old), and it was used for the Expectation Evaluation. The type of extraction (hot or cold) produced beverages with differences in composition but with similar acceptance. Except for pH (average value of 5.1), the beverages differed in all the studied parameters. Hot-extracted beverages (iced coffees) had higher contents of caffeine, chlorogenic acids, and melanoidins (92.9, 258.2, and 360.8∙10-6 kg 100 mL-1, respectively); they also presented higher acidity (3.4 mL of NaOH 20 mL-1) as well as higher yield compared to the cold-extracted beverages (cold brews). The use on product labels of brown and black colors, coffee bean images, and the inclusion of information regarding the bever ages (extraction method, consumption temperature, non-addition of sugar) generated a positive expectation that was assimilated by the young public. In conclusion, both proposals of cold coffee beverages (by hot or cold extraction) were well accepted considering their sensory and non-sensory aspects.Item Sensory quality of roasted coffee beans under different storage conditions(Editora UFLA, 2019-10) Nadaleti, Denis Henrique Silva; Rocha, Hully Alves; Mendonça, Luciana Maria Vieira Lopes; Mendonça, José Marcos Angélico de; Reis, Iêda Bruna dos; Evaristo, Carlos Henrique; Terra, Sávia Del ValeRoasted coffee is subject to loss of quality due to aging, and the intensity of these losses is influenced by packaging. The objective in this study was to evaluate the possible losses in the sensory quality of a specialty roasted coffee, stored in beans for 150 days in different packages and storage temperatures. The experiment was carried out in the Coffee Classification and Industrialization Laboratories of IFSULDEMINAS Campus Muzambinho. The coffee was roasted and after 48 hours it was packed in three different packages and kept stored at room temperature and refrigerated at 18ºC ± 1ºC for 150 days, with evaluations every 50 days, starting from zero time. The experimental design used was entirely randomized with 3 repetitions. Sensory evaluation was performed by three Q-Grader judges, according to the SCAA protocol. The data were evaluated using the SISVAR software, and when significance between treatments was detected, the regression and Scott-Knott tests were applied at the 5% probability level. The packaging used for storage did not interfere in the quality of the coffee. There was an interaction between temperature and storage time for the sensory attribute “body”. The quality decreased linearly with the storage time, from 86 to 80 points, to 84 days of storage.