Biblioteca do Café
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Item Determinants of the helpfulness of specialty coffee reviews on Amazon(Editora UFLA, 2025-03-20) Patiño Giraldo, Lida Valentina; Arango Pastrana, Carlos Alberto; Osorio Andrade, Carlos FernandoWith the increasing volume of online reviews on platforms like Amazon, customers must put considerable effort into isolating useful information from irrelevant or ambiguous content. One solution implemented by e-commerce sites to address this challenge is product review systems, where customers can vote on whether they find a review helpful, thereby reducing uncertainty in purchase decisions. Therefore, it is crucial to understand what makes a review helpful and how to enhance customer access to these valuable reviews. This study aims to analyze the content characteristics of online reviews that influence their perceived helpfulness in the context of specialty coffee products sold on Amazon. A content analysis was conducted on 2369 reviews to identify elements that contribute to their informational value. Subsequently, a zero-inflated negative binomial regression model was applied to test the hypotheses, addressing issues of overdispersion and an excess of zeros in the response variable. The findings suggest that aspects such as multimedia format, review depth, and the inclusion of extrinsic product attributes (price and quality) are key factors that enhance review helpfulness. On one hand, the use of images and videos helps consumers visualize the product and understand its features, while detailed and extensive reviews provide more comprehensive information. Moreover, factors like price and quality allow consumers to assess whether the product meets their needs and preferences. These findings are crucial for developing more effective marketing strategies in the coffee industry by providing a more precise understanding of the attributes most valued by consumers.Item Engineering Innovation for Cherry Coffee Wet Processing Using Circulation System and Agitator Grading Machine(Editora UFLA, 2025-04-28) Djafar, Zulkifli; Piarah, Wahyu Haryadi; Djafar, Zuryati; Massaguni, MassriyadyCoffee cherry grading technology is currently advanced, but it is necessary to adjust the sorting method and factors such as the condition of the coffee plantation location which has a limited water source to process wet processing such as semi-wash and full-wash. This study is an innovation of coffee cherry grading machines with semi-wash and full-wash methods that focuses on technology that can be applied to coffee plantation environments that have limited water sources so that the quality of water filtration, water quantity, and quality of coffee beans produced by this innovation are observed. The method used is to design and then measure the performance of the machine including filtration performance, the quantity of soaking media, and the quality of the coffee beans produced. The results of this innovation were successfully carried out by the application of effective water filtration, namely during the semi-wash process, the turbidity value in the Main Tube was 10.42 NTU and the Water Storage was 5.32 NTU. In the full wash process, the turbidity value at the Main Tube is 15.65 NTU and Water Storage is 7.70 NTU. This machine has a capacity of 7 kg of coffee with a volume of 306.79 liters of water required during the process. The quality of the green beans produced following SNI 01-2907-2008 and the visualization of coffee bean results according to the semi-wash green bean standard, which is bluish-green, and the full-wash result looks yellowish-green.Item Effect of Microwave Use on Kawa Daun Production: Production, Composition, and Antioxidant Properties(Editora UFLA, 2025-06-03) Arief, Rastra Gemi Nastiti; Malrianti, Yefsi; Kasim, Anwar; Neswati; SujatmikoKawa daun tea is a drink made of dried coffee leaves from Western Sumatra, offering refreshing benefits for the body. The use of a microwave in the drying process proves to be an effective method due to its significantly high efficiency. Therefore, this study aimed to investigate the impact of varying drying time using microwave on the characteristics of coffee leaves, kawa daun tea, and drinking water, as well as to determine effect of microwave treatment. This study uses a complete random design with ANOVA (Analysis of Variance) and followed by a DNMRT (Duncan’s News Multiple Range Test). The results showed that the difference in drying times significantly affected properties of coffee tea leaves, specifically on the total water-soluble substance test. However, there was no substantial impact on the yield, water level, polyphenols level, caffeine level, and antioxidant activity. The length was also affected by polyphenols level, total soluble solidity, and water solubility antioxidant activity, but did not impact caffeine content test. The maximum time for optimal drying coffee leaves was two minutes with a yield of 35.99% hydration, 4.33% water level, 48.56 mgGAE/g total polyphenols level, 0.56% caffeine level, 63.43% oxidative activity, and 4.61% total water-soluble material. In the chemical analysis of drinking water, the results obtained were total polyphenol content of 28.1 mg GAE/g, caffeine content of 0.45%, total dissolved solids of 1.87%, and antioxidant activity of 88.79%. Thus, it is also concluded that there is no negative effect of drying coffee leaves with a microwave.Item Association Between Black Tea and Coffee Consumption, Socioeconomic Status, and Digestive Disorders: A Case-Control Study(Editora UFLA, 2025-06-04) Asgharzadeh, Vahid; Mahdavipoor, Behroz; Asgharzadeh, Mohammad; Somi, Mohammad Hossein; Hosseini, Mohammad Reza; Ghazani, Hossein Bari; Ozma, Mahdi Asghari; Rashedi, Jalil; Kohkalani, Moein; Rezaei, Seyyed Amin SeyyedThis study aimed to explore the relationship between black tea and coffee consumption and the prevalence of digestive system disorders in the Azeri population of East Azerbaijan, Iran, while considering the influence of underlying social and economic conditions. A case-control study involved 186 patients diagnosed with digestive system disorders and 185 healthy controls. Data were collected via questionnaires that assessed demographic factors, black tea and coffee consumption habits, water intake, and socioeconomic status. We used a rapid urease test to detect Helicobacter pylori infection in the patients. Statistical analyses were performed using the chi-square test, with a p-value less than 0.05 as statistically significant. Black tea and coffee consumption was significantly higher in the patients than in the healthy controls (p < 0.05). Patients also had lower levels of education and financial status. Daily water intake was significantly lower in patients, while consumption of liquids with meals was higher (p < 0.05). Additionally, patients who consumed black tea and coffee after meals had a higher prevalence of digestive disorders. High consumption of black tea and coffee is associated with an increased risk of digestive system disorders, especially among individuals with lower socioeconomic status. These findings suggest that dietary habits, along with underlying social and economic conditions, should be considered when managing digestive health, especially in populations with high black tea and coffee consumption.Item Agricultural Practices, Climate Resilience, and Socioeconomic Factors Influencing Coffee Value and Productivity in Vietnam(Editora UFLA, 2025-05-20) Trung, Ha Quang; Tu, Le Minh; Quang, Luong HongThis study examines the factors affecting coffee value and yield among farming households in Vietnam’s Central Highlands. Utilizing data from the Vietnam Household Agriculture Research Survey and applying ordinary least squares regression, we examine how key variables such as Arabica cultivation, organic certification, input costs, labor, household characteristics, infrastructure access, and climate resilience impact coffee productivity and profitability. The results indicate that increasing the proportion of Arabica coffee significantly enhances both coffee value and yield. Efficient management of economic inputs, particularly irrigation and pesticide use, is found to be crucial in boosting productivity. Household characteristics, including education level and social organization membership, also positively impact coffee yield and profitability, reflecting the role of knowledge dissemination and community engagement. Conversely, high labor costs and remote farm locations negatively affect coffee productivity, while drought events significantly reduce coffee value, highlighting the vulnerability of coffee production to climate change. The findings provide empirical support for policy interventions aimed at strengthening Vietnam’s coffee sector through infrastructure investment, climate adaptation strategies, and the promotion of diversified coffee varieties. Additionally, the study underscores the importance of balancing economic inputs with sustainable farming practices to enhance both environmental and financial resilience.Item Profiling coffee consumers: an instrument based on values and attitudes for Spanish-speaking countries in Latin America with a sustainability perspective(Editora UFLA, 2025-05-20) Achicanoy Mejia, Viviana Carolina; Mejia, Luis Alberto Sandoval; Vanegas, Sarahi de los Angeles MoralesDespite the growing interest in sustainability in the coffee value chain, studies that identify consumers with sustainable values and attitudes are limited, particularly in Latin America. This study developed and validated an instrument in Spanish to cluster coffee consumers based on their sustainable attitudes and values. The instrument consists of 18 items grouped into five constructs: green, ethical, experience, price, and attachment. The validity and reliability of the instrument were verified through Principal Component Analysis and Confirmatory Factor Analysis with consumers from Latin America and Colombia. Thus, this instrument can be used to identify local market segments in producer countries.Item Unlocking the Probiotic with Antioxidant-Rich Potential from Wine Coffee: In vitro Screening and Characterization(Editora UFLA, 2025-05-19) Jatmiko, Yoga Dwi; Suharjono, Suharjono; Ardyati, Tri; Mustafa, Irfan; Mustamin, Aryan; Puja, Lintang Ratu; Arifah, Siti Nur; Atho'illah, Mochammad FitriFood companies are becoming interested in lactic acid bacteria (LAB) due to their promising health benefits. LAB can be isolated from several bioresources; nothing is known about the probiotic potential of fermented coffee products like wine coffee. The study aimed to determine the probiotic potential of LAB isolated from wine coffee with antioxidant properties. Characterization of probiotics included antioxidant activity, acidity resistance, bile salt tolerance, antibacterial activity, antibiotic sensitivity, and haemolytic activity. The promising probiotics were identified using 16S rDNA sequences. The current results demonstrated that twenty-five isolates were found in wine coffee, and all showed antioxidant activities. Isolate E1 has the highest antioxidant activity (64.31%) among others. Isolates D4 and E2 were proposed as potential probiotics due to survival at low pH (pH 2) and bile salt (2%), inhibit Bacillus cereus ATCC 1178, Escherichia coli ATCC 25922, Staphylococcus aureus ATCC 29213, and Salmonella Typhimurium TRD1, and do not display haemolytic activity. Isolates D4 and E2 demonstrated resistant to Kanamycin and Aztreonam. Based on molecular identification, isolates E2 and D4 were identified as Lactiplantibacillus plantarum, E1 was identified as Lacticaseibacillus paracasei. These LAB isolates are promising probiotic candidates and require further validation of their strain-specific potential.Item Antioxidant Activity and Phytochemicals of Freeze-dried and Spray-dried Soluble Coffee Brews(Editora UFLA, 2025-05-19) Susilawati, I Dewa Ayu; Muzeka, FrediThis study analyzed the antioxidant activity and the concentration of several phytochemicals i.e. polyphenols, caffeine, glutathione (GSH), and protein, of freeze-dried and spray-dried soluble coffee brews. Six types of coffee samples were analyzed i.e., 1) Spray-Dried Robusta instant coffee (SDR), 2) Freeze-Dried Robusta instant coffee (FDR), 3) Regular Robusta coffee powder (RR), 4) Spray-Dried Arabica instant coffee (SDA), 5) Freeze-Dried Arabica instant coffee (FDA), and 6) Regular Arabica coffee powder (RA). Antioxidant activity was determined using the 2,2-diphenyl-1-picryl-hydrazyl-hydrate (DPPH) radical scavenging assay. Polyphenols, caffeine, glutathione, and protein were measured spectrophotometrically. Results showed that freeze-dried instant coffee (both robusta and arabica) in a concentration of 500 ppm demonstrated DPPH radical scavenger activity >80% and significantly higher (p<0.05) compared to spray-dried soluble coffee and regular coffee brews. This level was maintained in concentrations of 750 ppm, 1000 ppm, and 1500 ppm. The higher antioxidant activity of freeze-dried coffee brew was in line with the higher concentration of polyphenols, caffeine, GSH, and protein. In conclusion, freeze-dried instant coffee demonstrated more sensitive antioxidant activity, probably due to its more abundant polyphenols, caffeine, GSH, and protein.Item Identification of morphoagronomic traits correlated with the N use efficiency in coffee(Editora UFLA, 2025-04-29) Moura, Waldenia de Melo; Ribeiro, Poliane Marcele; Soares, Luciana Gomes; Silva Júnior, Antônio Carlos da; Ferreira, Tatiane Cravo; Gravina, Geraldo de Amaral; Martinez, Hermínia Emília PrietoThe study of nutritional efficiency is an expensive process, as it requires extensive planting areas, several years of evaluation and the destruction of plants. To mitigate these difficulties, a strategy would be to identify easily measurable traits associated with nutritional efficiency in growing a nutritional solution. Thus, the objective of this study was identify morphoagronomic traits correlated with the N-efficiency indices in to assist in selecting coffee genotypes for environments with N restriction. Twenty arabica coffee genotypes were grown in a nutrient solution with a low concentration of nitrogen (1.0 mmol L-1). The experiment was conducted in a randomized block design with three replications. There was variability among the coffee genotypes for all the traits evaluated. Most of the traits evaluated showed greater genetic than environmental influence on phenotypic expression. Heritability (H2) was greater than 70% for most of the traits evaluated, with an emphasis on plant height and internode length, which also had the highest relative variation indices (RVIs). The associations between morphoagronomic traits and nutritional efficiency indices revealed greater contributions of genotypic correlation than of environmental correlation. Among the traits associated with nutritional efficiency indices, stem diameter has the potential for use in breeding programs for the selection of cultivars that present greater nitrogen efficiency in environments with nitrogen restriction.Item Morphological diversity of arabica coffee (Coffea arabica) by in-situ exploration in three agroecosystems West Java, Indonesia(Editora UFLA, 2025-05-20) Maxiselly, Yudithia; Atiningsih, Fukita Ghaury; Rasiska, Siska; Hutapea, Dedi; Bakti, Citra; Wahyudin, Abdillah Azzam; Maharani, YaniArabica coffee, a type of coffee in high demand, is cultivated in various regions. West Java is a significant contributor to Arabica coffee production in Indonesia. This region has various coffee agroecosystems. The research aims to identify the diversity of West Java Arabica coffee cultivated in different agroecosystems. The research involved observing plantation locations of Arabica coffee in Cimaung, Cilengkrang, and Pangalengan, West Java, in three agroecosystems (agroforestry, intercropping area, and residential area). Fifty-two accessions were found and analyzed using the Shannon diversity index for qualitative characters, Principal Component Analysis (PCA), and Cluster analysis. The Shannon diversity index revealed the range between 0.221 and 1.55; the PCA results show a variability of 43.208% on two main components (PC1-PC2), indicating a wide variation for Arabica coffee accessions. The characteristics of fruit, seed, and leaf qualitative traits were influential in determining diversity. The cluster analysis explained the distribution patterns of agroecosystems and the relationship of each accession. It showed a close relationship between agroforestry and residential areas. The cluster analysis also revealed distinct variations of accessions in the agroforestry and residential area at Cilengkrang compared to others. Based on the results, these findings could potentially be used as basic knowledge to develop a new Arabica coffee clone, especially in West Java.