Coffea Arabica
Mostrando 1-12 de 1154 artigos, teses e dissertações.
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1. Colletotrichum spp. and other fungi associated with anthracnose on Coffea arabica L. in Mérida State, Venezuela
RESUMO Nas regiões tropicais e subtropicais do mundo todo, as enfermidades podem ser fatores limitantes importantes para a produção do café (Coffea arabica), que possui grande valor no mercado internacional. O objetivo do presente trabalho foi identificar as espécies de Colletotrichum spp. e de outros fungos associados a queda dos dos frutos do café (Q
Summa Phytopathologica. Publicado em: 2022
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2. Estimation of percentage of impurities in coffee using a computer vision system
RESUMO A qualidade e o valor da bebida do café podem ser afetados pela contaminação de impurezas durante a torra e moagem. Métodos que permitem o controle de qualidade do produto comercializado são importantes para atender aos padrões exigidos pelos consumidores e pela indústria. Objetivou-se neste estudo estimar o percentual de impurezas contidas no
Revista Brasileira de Engenharia Agrícola e Ambiental. Publicado em: 2022
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3. Digital imaging of coffee leaves under different nitrogen concentrations applied to soil
ABSTRACT Brazil is the largest Coffea arabica L. producer and exporter in the world market. In view of the need for nitrogen fertilization, the objective of this work was to evaluate the use of digital images of coffee leaves as a function of nitrogen concentration and cultivars, as well as to evaluate the most adequate sampling of this technique to predict
Revista Ceres. Publicado em: 2022
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4. ATR-FTIR FOR CHARACTERIZING AND DIFFERENTIATING DRIED AND GROUND COFFEE CHERRY PULP OF DIFFERENT VARIETIES (Coffea Arabica L.)
ABSTRACT This study aimed to evaluate the performance of the infrared spectrum in the range of 4000−650 cm−1 for characterizing and differentiating dried and ground coffee cherry pulp of different varieties. The spectral data were subjected to first and second derivative treatments to perform the statistical analyses. Three varieties of coffee pulp were
Eng. Agríc.. Publicado em: 2021-02
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5. EFFECT OF THE POSTHARVEST PROCESSING METHOD ON THE BIOCHEMICAL COMPOSITION AND SENSORY ANALYSIS OF ARABICA COFFEE
ABSTRACT The objective of this work was to study the influence of two postharvest processing methods on the biochemical composition and sensory analysis of a Colombian specialty coffee. For this purpose, coffee beans (Coffea arabica) of the Castillo variety were collected and processed using the wet and semi-dry methods, and the drying process was conducted
Eng. Agríc.. Publicado em: 2020-04
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6. INFLUENCE OF DIFFERENT TEMPERATURES AND AIRFLOWS ON DRYING OF NATURAL AND PULPED COFFEE
ABSTRACT This study aimed to evaluate drying kinetics for natural and pulped coffee, using different temperatures and drying airflows. For the conduction of the experiment, coffee fruits (Coffea arabica L. cv. Topázio) were harvested manually, selecting only ripe fruits and subsequent to the hydraulic separation. For drying the coffee, use a mechanical drye
Eng. Agríc.. Publicado em: 2020-04
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7. A INTENSIDADE DA FLORADA DO CAFÉ ARÁBICA DEPENDE DO NÍVEL DE DEFICIT HÍDRICO APLICADO NO PERÍODO PRÉ-FLORADA
RESUMO Floradas desuniformes traduzem-se em desigualdade na maturação dos frutos, comprometendo a eficiência de colheita e a qualidade do café. Objetivou-se neste trabalho determinar o nível de deficit hídrico para a quebra de dormência das gemas de Coffea arabica, e seus efeitos sobre as trocas gasosas, os teores de pigmentos fotossintéticos, a prod
Rev. Caatinga. Publicado em: 2020-03
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8. SORPTION ISOTHERMS AND ISOSTERIC HEAT OF PERICARP AND ENDOSPERM TISSUES OF ARABICA COFFEE FRUIT
ABSTRACT The aim of this study was to evaluate and model the hygroscopic equilibrium and isosteric heat curves of pericarp and endosperm tissues of arabica (Coffea arabica) coffee fruit, in different temperature and relative humidity conditions. Sorption isotherms were drawn under temperatures from 20°C to 70°C and relative humidity ranging between 10% and
Eng. Agríc.. Publicado em: 2020-02
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9. Evaluation of Aqueous Coffee Husks Extracts as a Corrosion Inhibitor of 1020 Carbon Steel in 1 mol L-1 HCl Solution
Corrosive processes in acidic medium reduce the performance and durability of metallic materials, causing problems to several industries. Corrosion inhibitors are commonly used to decrease these effects. As these inhibitors must be ecologically friendly currently, this work evaluated the anticorrosive effect of natural extracts of coffee husks (Coffea arabic
Mat. Res.. Publicado em: 09/12/2019
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10. Sensory quality of Coffea arabica L. genotypes influenced by postharvest processing
Abstract The specialty coffee market has grown significantly in the past decades and has several cultivars with productive potential. The objective of this study was to evaluate the sensory profile of the beverage produced from Coffea arabica L. genotypes based on postharvest processing and to identify cultivars with the greatest genetic potential for coffee
Crop Breed. Appl. Biotechnol.. Publicado em: 05/12/2019
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11. Radiographic analysis and performance of coffee seeds
Resumo: A análise radiográfica tem sido eficiente na identificação das principais alterações na morfologia interna de sementes, sendo cada vez mais utilizada em programas de controle de qualidade, devido à sua praticidade, objetividade e rapidez na obtenção dos resultados. Apesar dessas vantagens, ainda não existem estudos que comprovem a eficiênc
J. Seed Sci.. Publicado em: 05/12/2019
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12. Multiple resistance to bacterial halo blight and bacterial leaf spot in Coffea spp.*
RESUMO O melhoramento de plantas para resistência genética é um método importante para o manejo de doenças, pelos inúmeros benefícios e baixo custo de implementação. No presente estudo, progênies de 11 espécies de Coffea e 16 acessos selvagens de C. arabica foram testados quanto à resposta a Pseudomonas syringae pv. garcae, agente causal da manch
Arq. Inst. Biol.. Publicado em: 25/11/2019