Biblioteca do Café
URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/1
Navegar
25 resultados
Resultados da Pesquisa
Item Physical and sensorial quality of arabica coffee cultivars submitted to two types of post-harvesting processing(Universidade Federal de Lavras, 2023-04-17) Alixandre, Ricardo Dias; Alixandre, Fabiano Tristão; Lima, Paula Aparecida Muniz de; Fornazier, Maurício José; Krohling, Cesar Abel; Amaral, José Francisco Teixeira do; Guarçoni, Rogério Carvalho; Dias, Rodrigo da Silva; Venturini, Cassio de Faria; Macette, Higor Alixandre; Zandonadi, Cecília Uliana; Viçosi, David BrunelliThe growing demand for better quality coffees has driven changes in the coffee production chain, mainly through the adoption of new technologies and management. Thus, this work was carried out aiming to evaluate the physical and sensorial quality of Arabica coffee cultivars, submitted to natural and pulped post-harvesting processing. The experiment was carried out following a randomized block design with three replications, in a split-plot scheme, with the plots consisting of five cultivars (Catucaí 2 SL, Catucaí 24/137, Catuaí IAC 44, Arara and Acauã); and the subplots by two processes, pulped and natural cherry. The harvest was carried out manually, harvesting the cherry fruits (ripe) in a sieve. The coffees were processed by the natural and pulped cherry methods. Drying was carried out on a covered suspended terrace, until the grains reached 11% ± 1 moisture (wet basis, bu). The following evaluations were carried out: sensorial analysis of the beverage according to the SCAA methodology, analysis of grain sieves according to the Official Brazilian Coffee Classification Protocol. The results show that all evaluated cultivars have a great potential for the production of specialty coffees in that studied environment. Differences were observed between cultivars both in the sensory quality of the beverage and in the grain size. Cultivar Arara presents a general average of final beverage grade higher than the other cultivars.Item Best time and doses to associate chemical and biological control of the coffee berry borer in highland region, Brazil(Editora UFLA, 2021) Krohling, Cesar Abel; Fornazier, Maurício José; Mendonça, Pedro Luís Paulino de; Guarçoni, Rogério Carvalho; Martins, David dos Santos; Alixandre, Fabiano Tristão; Dias, Rodrigo da Silva; Rodrigues, Fernanda Latanze MendesThe coffee berry borer (CBB) Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae) causes significant damage to yield and quality of coffee beans. Cultural measures are important however, chemical and biological control must be adopted within an integrated CBB management system in order to prevent its damage mainly in larger areas. This study aimed to evaluate different doses and times of spray of the chemical insecticide metaflumizone and its association to the entomopathogenic fungus Beauveria bassiana as a tool to the management of CBB in Arabica coffee. The study was carried out in a high dense crop of Arabica coffee cultivar Catuaí Vermelho at 700 m altitude in the highlands of Espírito Santo state, Brazil. The experimental design used was randomized blocks with eleven treatments, four replications and plots of ten plants. Seven evaluations were carried out by sampling the berries in the upper, middle and two sides of the coffee trees. Metaflumizone at a total dose of 3.5 L ha-1 showed high performance for the control of CBB under field conditions in regions of high altitude. The association of metaflumizone with B. bassiana reduced a mean of 88.5% the infestation level of CBB in the post-harvested coffee beans and it can be used as one of the tools for the Integrated Management of CBB under field conditions. Beauveria bassiana can be associated with metaflumizone to control CBB as a complementary spray in March and at a dose of 2.0 kg ha-1 and should be also used in the Integrated Management of CBB. The monitoring of CBB population must be carried out and the first spraying with chemical or biological insecticide must be started at the recommended control level and in the transit season of CBB when flying adults are exposed.Item Sensory analysis and mid-infrared spectroscopy for discriminating roasted specialty coffees(Editora UFLA, 2021) Debona, Danieli Grancieri; Oliveira, Emanuele Catarina da Silva; Caten, Carla Schwengber ten; Guarçoni, Rogério Carvalho; Moreira, Taís Rizzo; Pereira, Lucas Louzada; Moreli, Aldemar PoloniniIn general, the process of roasting coffee uses a rotated fix drum or fluidized bed. Theoretically, the fluidized bed can provide more homogenous roastings throughout the process. Thus, in this study, we analyzed the sensorial and chemical attributes for two different coffees submitted to three roasting profiles using fluidized bed roaster. The coffees were roasted for a high temperature for a short time (HTST), medium temperature for a medium time (MTMT), and low temperature for a long time (LTLT). Sensory analysis was performed on the roasted coffees according to the SCA methodology and chemical analy sis through mid-infrared spectroscopy. The results of sensory analysis indicated a preference for MTMT roasting for coffee grown at high altitude and HTST roasting for coffee grown at low altitude. Chemically, coffees show that LTLT and MTMT roasts are most distant from each other in their chemical com position when roasting low altitude coffee, whereas the HTST and MTMT roasts are the most distant from each other when roasting high altitude coffee.Item Physicochemical parameters of arabica fermented coffee in different altitudes(Editora UFLA, 2021) Pereira, Lucas Louzada; Guarçoni, Rogério Carvalho; Moreli, Aldemar Polonini; Pinheiro, Patrícia Fontes; Pinheiro, Carlos Alexandre; Moreira, Taís Rizzo; Siqueira, Evandro de Andrade; Caten, Carla Schwengber tenThe coffee quality interacts with different processes, techniques, analyses, and concepts. This study applied six different forms of wet fermentation to coffee from different altitude ranges to understand how coffee quality interacts with the physicochemical profile and its possible relations with sensory variables. Statistical analysis was performed through combined analyses of variance of the experiments, and the means were compared by the Tukey test considering the significance level of 5%. Regression models were tested by the F-test and the parameters by the t-test, followed by Pearson correlation analysis between the sensory and physicochemical characteristics and between physicochemical variables. The results indicate a correlation between sensory and physicochemical variables for total titratable acidity and indicate that these compounds are affected by the manner of fermentation applied as well as the edaphic and climatic conditions.Item Sensory Q-Grader evaluation of fermented arabica coffees by yeast (Saccharomyces cerevisiae) and lactic bacteria (Pediococcus acidilactici) cultures(Editora UFLA, 2020) Rodrigues, Sandy Dias; Coelho, Vinicius Serafim; Freitas, Valdeir Viana; Brioschi, Alessandra; Brioschi Júnior, Dério; Guarçoni, Rogério Carvalho; Pereira, Lucas Louzada; Eller, Monique Renon; Cardoso, Wilton SoaresThe objective of this study was to evaluate sensorially, by professional Q-Grader, the beverage coffee from fermentation natural and fermentation with the use of yeasts and lactic acid bacteria as starter cultures in wet coffee processing. The Arabica coffee was harvested at two different altitudes in Espírito Santo State. Both coffees went through 04 treatments: inoculated with starter cultures Saccharomyces cerevisiae (YML) or Pediococcus acidilactici CCT 1622 (LAF), natural fermentation (NF) (not inoculated) and Control, without fermentation (WF). The coffee was processed by just the wet process. After process and roasting, the sensorial analysis was performed to understand the impact of fermentation processing in the coffee quality, and was performed by 6 Q-Graders, following SCA protocol. The study evidenced that the use of natural fermentation or starter cultures during post-harvest coffee contributed to obtain a quality beverage with pleasurable sensorial characteristics, punctuated by the tasters in the overall score obtained and also by the high sensory scores in attributes such as fragrance, acidity, aftertaste and the different perceived aromas. This work demonstrates for coffee growers that fermentation technology is not intuitive but requires an understanding of the relationship of the microorganisms with the coffee and the environment. In addition to the other chemical aspects of roasting and brew coffee.Item Chemical and sensory perception of robusta coffees under wet processing(Editora UFLA, 2020) Oliveira, Emanuele Catarina da Silva; Guarçoni, Rogério Carvalho; Castro, Eustáquio Vinicius Ribeiro de; Castro, Marina Gomes de; Pereira, Lucas LouzadaThe quality of the coffee is determined by the sensorial analysis, using subjective methods and it is known that this quality is related to the chemical constituents of the grains. The present study used infrared spectroscopy to correlate the chemical composition of the grain with the final quality of the product and to assist in the current evaluation method, generating more reliability in the process. This study applied the spontaneous and induced fermentation with starter cultures (yeast) to evaluate the sensory potential from the impacts generated by the types of processes adopted. The experiments were conducted in a randomized block design with five replicates, in a 3x4 factorial scheme, with three fermentation times: 24, 48, and 72 hours and four wet processes: Washed, Yeast fermentation, Fully washed without yeast, and Fully washed with yeast. Infrared spectra were taken in the medium region (FTIR-ATR) of the 34 samples generated by the treatments. Given that the method of determining the quality of coffee is subjective, based on scores given by cuppers, the FTIR-ATR spectra were used in the construction of chemometric models to predict sensory ratings given to the attribute ‘acidity’. The mean error of prediction of the model constructed for the sensory score was 0.11. Sensory results indicated a higher score for the acidity attribute, in dry fermentation with yeast at the time of 48 hours, suggesting a new strategy for the production of quality robusta coffee.Item Características sensoriais de cultivares de café na região de montanhas do estado do Espírito Santo, Brasil(Embrapa Café, 2019-10) Krohling, Cesar Abel; Sobreira, Fabrício Moreira; Alixandre, Fabiano Tristão; Sousa, Douglas Gonzaga de; Barbosa, Nieson; Teófilo, Pedro Paulo; Dias, Rodrigo da Silva; Guarçoni, Rogério Carvalho; Fornazier, Maurício JoséEste trabalho teve como objetivo avaliar as características sensoriais de diferentes cultivares/genótipos de café arábica processadas por via úmida sem a retirada da mucilagem. O estudo foi realizado no município de Marechal Floriano, ES, (altitude 755 m) em solo LVA. O plantio das 25 cultivares/genótipos de café foi realizado em março/2010, em espaçamento de 2,5 x 1,0 m com, no delineamento de blocos ao acaso com três repetições de 10 plantas/parcela. Foram realizadas avaliações das características sensoriais seguindo metodologia da SCAA. Os resultados mostraram que existem diferenças entre as características sensoriais da bebida do café entre as vinte e cinco cultivares/genótipos de café. Pode-se concluir que ocorreram diferenças entre os atributos sensoriais da bebida do café para as cultivares/genótipos estudados; os frutos com coloração mais intensa no momento da maturação fisiológica obtiveram as maiores notas na prova da xícara; todas as cultivares/genótipos apresentaram potencial para produção de cafés especiais.Item Interação de tipos de poda x ambientes para café arábica(Embrapa Café, 2019-10) Krohling, Cesar Abel; Sobreira, Fabricio Moreira; Alixandre, Fabiano Tristão; Souza, Douglas Gonzaga de; Rocha, Wendy de Andrade; Souza, Matheus Fonseca de; Lima, Túlio Luís Borges de; Guarçoni, Rogério Carvalho; Fornazier, Maurício JoséA prática da poda das lavouras de café vem sendo aplicadas em maior escala e com maior frequência como elemento no manejo dos tratos culturais dos talhões para diminuir custos e facilitar a colheita. O trabalho teve como objetivo avaliar a interação de diferentes tipos de poda de esqueletameto e decote médio em café arábica em diferentes ambientes, na Região das Montanhas e Caparaó Capixaba. Foram testados diferentes tipos de poda em quatro municípios com diferentes condições de cultivo. O delineamento experimental para os quatro locais foi em blocos ao acaso, seis tratamentos (Marechal Floriano e Iuna) e sete tratamentos (Brejetuba e Domingos Martins), três repetições de três linhas com sete plantas/linha. Os resultados mostraram diferenças entre os tratamentos nos municípios e destes para com as características agronômicas avaliadas. Conclui-se que a poda do tipo Esqueletamento convencional apresentou resultados igual ou superior à testemunha para as características de vigor, número de nós, ferrugem, produtividade e tamanho de peneira nos quatro municípios, a poda do tipo Decote médio mostrou resultados igual ou superior para as características de vigor, número de nós e produtividade.Item Consistência de Q-Graders na análise sensorial de cafés com diferentes perfis de torra(Embrapa Café, 2019-10) Debona, Danieli Grancieri; Marcate, João Paulo Pereira; Moreira, Taís Rizzo; Guarçoni, Rogério Carvalho; Moreli, Aldemar Polonini; Pereira, Lucas LouzadaO café é uma das bebidas mais consumidas em todo o mundo, sendo composto com características especificas que dão origem a qualidade do café e a percepção sensorial. A qualidade do café, que de uma maneira geral é definida por um conjunto de atributos físicos, químicos, sensoriais, que proporcionam prazer e segurança a seus consumidores ao degustá-lo, torna-o um produto complexo, com diversas interações entre o processo de análise sensorial. Uma das formas de definir características e avaliar a qualidade e garantir a homogeneidade dessa bebida é por meio da análise sensorial. Os Q-Graders são profissionais treinados que fazem essa análise com auxílio de um protocolo desenvolvido pela SCA. Entretanto há muita discussão acerca da subjetividade desse método, visto que cada provador tem sua preferência quanto a atributos. Desta forma o presente trabalho busca avaliar as notas de cinco provadores Q- Graders em relação a um café submetido a 3 curvas de torra distintas, de modo a inferir se há consistência entre eles.Item Percepção de Q-Graders russos e brasileiros sobre cafés fermentados(Embrapa Café, 2019-10) Pereira, Lucas Louzada; Guarçoni, Rogério Carvalho; Mokusunova, Valentina; Debora, Danieli Grancieri; Brioschi Júnior, Dério; Sousa, Luiz Henrique Bozzi Pimenta de; Marcate, João Paulo Pereira; Moreira, Tais Rizzo; Moreli, Aldemar PoloniniO processo de análise sensorial é uma das etapas de validação da qualidade do café em todo o mundo, sendo que neste caso, a aplicação de provadores treinados se faz presente em quase todas as empresas que possuem processos de compra, venda, industrialização e distribuição de cafés para consumidores. O programa de formação de Q-Graders constitui-se numa metodologia mundialmente reconhecida, como base no amplo espectro de formação dos profissionais, que são submetidos a diversos testes de calibragem, olfato, tato e palato. Neste estudo, quinze amostras de cafés oriundos do grupo de arábica e conilon, foram submetidas a processos de fermentação e apresentas a oito Q-Graders, em dois países distintos, Rússia e Brasil, para que fosse possível avaliar o nível de calibragem dos profissionais em relação aos cafés que sofreram modificações em seus processos de pós-colheita. O experimento foi conduzido em delineamento inteiramente casualizado. As médias dos diferentes níveis de qualidade de aplicações Q-Graders Russos e Brasileiros foram comparadas usando o teste de 5% a probabilidade. Foi elaborada uma análise de similaridade entre os cafés e entre os degustadores, com uma matriz com as variáveis e, posteriormente, foram construídos dendrogramas utilizando a distância euclidiana média. Os resultados indicam que os profissionais possuem uma percepção sensorial com nível elevado de calibragem, todos os provadores observaram defeitos em um único café, indicando consistência da metodologia. Por fim, os resultados indicam que para o café conilon, as fermentações promoveram notas sensoriais próximas ao café arábica e em alguns cenários, notas superiores.
- «
- 1 (current)
- 2
- 3
- »