Genetic Variability and Correlation of Biochemical and Sensory Characteristics of Coffee

Organoleptic and biochemical attributes in the coffee bean determine the final cup quality of coffee which is a critical factor in the price determination of coffee in the market. The study aimed at determining the genetic variability of the green coffee bean. The trial sites were located at Siaya and Busia counties in Kenya. Nineteen different genotypes were established and included Arabusta coffee hybrids, backcrosses of Arabica to tetraploid Robusta, Arabica coffee, Robusta coffee, and Arabusta coffee. Randomized Complete Block Design with three replications in each site was used in conducting the experiment. The coffee beans were harvested in the year 2018 and extraction and calculation of sucrose, trigonelline, caffeine, and chlorogenic acids was carried using the recommended methods. The cupping procedure involved the use of five judges in assessing the flavor, aroma, balance, overall standard, acidity, body, and aftertaste of the roasted coffee beans. The sensory evaluation used the Specialty Coffee Association (SCA) method. There were significant variations recorded for the traits that were measured. All the traits were highly heritable registering values of > 50% for heritability whereby, caffeine and oil were highly heritable traits with 90.8% and 88.9% respectively. Oil had a high phenotypic coefficient of variation, genotypic variation, and response values when compared to the other traits. All the organoleptic traits were positively correlated with sucrose, trigonelline, and oil but the correlation with caffeine and chlorogenic acids was negative. The genotypic effects contributed largely to the high heritability recorded with a low influence from the environmental factors.

Do connoisseur consumers care about sustainability? Exploring coffee consumption practices through netnography

PurposeThe coffee industry has experienced two major trends: the development of connoisseur consumption of specialty coffee and the importance of sustainability. Despite the increasing concomitant relevance of both trends, literature on how sustainability has been interlacing with connoisseur consumption is rather limited. Therefore, this paper aims to analyse how connoisseur consumers (CC) integrate sustainability into their coffee consumption practices.Design/methodology/approachThe paper adopts a qualitative netnographic approach through an interpretive cultural analysis of specialty coffee bloggers narratives, conceived as a specific sub-group of CC that tend to be particularly active on social media.FindingsThrough the lens of social practice theories, the study reveals that CC are likely to implement and perceive sustainability very differently from the dominant mass market as subject to the influence of their shared rituals, values, norms and symbolic meanings. Such findings are relevant under a managerial perspective as they also generate insights on how to foster environmentally friendly practices in coffee consumers as well as on how to create more sustainable marketing strategies.Originality/valueThe study contributes to the literature on coffee consumption behaviour and sustainability. First, by analysing actual behaviours rather than intended, the study offers an alternative approach to the dominant paradigm of linear decisions models in the study of sustainable consumption. Second, because CC possess a unique consumption style, different from the mainstream market, the analysis has led towards the identification of alternative sustainable consumption patterns and enablers.

The Potential of Spectroscopic Techniques in Coffee Analysis—A Review

This review provides an overview of recent studies on the potential of spectroscopy techniques (mid-infrared, near infrared, Raman, and fluorescence spectroscopy) used in coffee analysis. It specifically covers their applications in coffee roasting supervision, adulterants and defective beans detection, prediction of specialty coffee quality and coffees’ sensory attributes, discrimination of coffee based on variety, species, and geographical origin, and prediction of coffees chemical composition. These are important aspects that significantly affect the overall quality of coffee and consequently its market price and finally quality of the brew. From the reviewed literature, spectroscopic methods could be used to evaluate coffee for different parameters along the production process as evidenced by reported robust prediction models. Nevertheless, some techniques have received little attention including Raman and fluorescence spectroscopy, which should be further studied considering their great potential in providing important information. There is more focus on the use of near infrared spectroscopy; however, few multivariate analysis techniques have been explored. With the growing demand for fast, robust, and accurate analytical methods for coffee quality assessment and its authentication, there are other areas to be studied and the field of coffee spectroscopy provides a vast opportunity for scientific investigation.

Rhizo Coffee A Novel Fermented Coffee Product

<p>The aim of this project was to discover whether there is a market for fermented specialty coffee beverages, as the niche for fermented products is expanding, due to people becoming more health conscious and aware about their health (Mellentin, 2017). This fermented beverage could potentially be less bitter due to lower acidity levels and easier to digest then most coffees due to its lower caffeine content. The coffee product would be made from high quality Arabica coffee beans, to ensure the best possible flavour characteristics (Driftaway Coffee, 2018) and ethical sourcing and sustainable practices would be implemented during the coffees development and fermentation processes. As the specialty coffee industry is expanding globally (Lee W. , Cheong, Curran , Yu, & Liu, 2015), it brings about the opportunity to disrupt the specialty coffee market with this fermented product through the collection of evidence-based qualitative and quantitative research, to build a strong business case for its commercialisation. The key market research findings from this study show that people generally like to experiment with their coffee and are willing to try fermented coffee beverages. Qualities that the majority of respondents look for in a coffee brand are good taste and flavour, ethical sourcing of their products and the use of high-quality coffee beans. Other findings suggest that the specialty coffee industry is a very saturated market (The Register Team (TRT), 2017) and in order to stand out in this market the product needs to have a strong point of difference, a good brand and an interesting story. Good taste and high quality are two traits that seem to be the baseline for coffee products in the New Zealand specialty coffee market (Anthony, 2014). The key scientific findings are to be confirmed in subsequent laboratory trials, which will aim to validate the science in the papers by Lee, Wai Cheong , Curran, Yu, & Shao Quan, 2016b; Lee, et al., 2016c further. The results from this project have enabled the development of a business strategy that primarily targets those who earn between $50,000-$99,999 New Zealand Dollars (NZD) per annum (p.a.) in the age range between 18-34 years old. This subgroup could be expanded to those who earn $50,000+ NZD p.a. and target millennials (born between 1980 and 2000 or 18-38 years old) in future research (Goldman Sachs, 2018). In the early stages of the project if the science is validated on a small scale, capital could be raised through a crowd funding platform like Kickstarter, so that subsequent trials can continue (Kickstarter, 2018a). When the business case for the product is strong, key investors will be targeted for their assistance in future product development, verification and market validation. This strategy is a part of the business model for the project that outlines the best course of action given the current market research and scientific evidence that is available. If this project were to be successfully funded and a minimum viable product were to be developed, large scale laboratory trials could be conducted bringing the product one step closer to commercialisation. If the product were to reach this stage, it would allow specialty coffee consumers the opportunity to experience a fermented coffee beverage that uses ethical and sustainable practices and potentially contains unique flavour nuances, health benefits and less bitter compounds.</p>

Rhizo Coffee A Novel Fermented Coffee Product

<p>The aim of this project was to discover whether there is a market for fermented specialty coffee beverages, as the niche for fermented products is expanding, due to people becoming more health conscious and aware about their health (Mellentin, 2017). This fermented beverage could potentially be less bitter due to lower acidity levels and easier to digest then most coffees due to its lower caffeine content. The coffee product would be made from high quality Arabica coffee beans, to ensure the best possible flavour characteristics (Driftaway Coffee, 2018) and ethical sourcing and sustainable practices would be implemented during the coffees development and fermentation processes. As the specialty coffee industry is expanding globally (Lee W. , Cheong, Curran , Yu, & Liu, 2015), it brings about the opportunity to disrupt the specialty coffee market with this fermented product through the collection of evidence-based qualitative and quantitative research, to build a strong business case for its commercialisation. The key market research findings from this study show that people generally like to experiment with their coffee and are willing to try fermented coffee beverages. Qualities that the majority of respondents look for in a coffee brand are good taste and flavour, ethical sourcing of their products and the use of high-quality coffee beans. Other findings suggest that the specialty coffee industry is a very saturated market (The Register Team (TRT), 2017) and in order to stand out in this market the product needs to have a strong point of difference, a good brand and an interesting story. Good taste and high quality are two traits that seem to be the baseline for coffee products in the New Zealand specialty coffee market (Anthony, 2014). The key scientific findings are to be confirmed in subsequent laboratory trials, which will aim to validate the science in the papers by Lee, Wai Cheong , Curran, Yu, & Shao Quan, 2016b; Lee, et al., 2016c further. The results from this project have enabled the development of a business strategy that primarily targets those who earn between $50,000-$99,999 New Zealand Dollars (NZD) per annum (p.a.) in the age range between 18-34 years old. This subgroup could be expanded to those who earn $50,000+ NZD p.a. and target millennials (born between 1980 and 2000 or 18-38 years old) in future research (Goldman Sachs, 2018). In the early stages of the project if the science is validated on a small scale, capital could be raised through a crowd funding platform like Kickstarter, so that subsequent trials can continue (Kickstarter, 2018a). When the business case for the product is strong, key investors will be targeted for their assistance in future product development, verification and market validation. This strategy is a part of the business model for the project that outlines the best course of action given the current market research and scientific evidence that is available. If this project were to be successfully funded and a minimum viable product were to be developed, large scale laboratory trials could be conducted bringing the product one step closer to commercialisation. If the product were to reach this stage, it would allow specialty coffee consumers the opportunity to experience a fermented coffee beverage that uses ethical and sustainable practices and potentially contains unique flavour nuances, health benefits and less bitter compounds.</p>

Aroma Profile of Arabica Coffee Based on Ohmic Fermentation

Aromatic components contained in coffee are the important components. Several technologies can be used to improve the aroma quality of coffee, for example with ohmic technology. This study established a specialty coffee processing system focused on ohmic-based fermentation technology. The aim of this study was to identify the aroma compound in coffee that fermented by ohmic technology. The SPME method by gas chromatography-mass spectrometry is used in this study. The temperatures (30, 35, and 40°C) and fermentation time were set for this study (2, 6, 12, and 18 h). The results of the sensory test of sample coffee from Indonesia with specification of areas of origins Enrekang and Gowa in comparison with a sample of coffee from Japan can conclude that the panelist provided a rating profile liking the sample coffee from Japan, but the overall results of the quantitative descriptive analysis (QDA) of the second sample are similar or nonsignificantly different. Compound pyrazine identified in GC-MS is earthy odor which has a correlation with the results of sensory taste QDA on sample coffee from Japan.

Methods for quality coffee roasting degree evaluation: a literature review on risk perspective

The demand for specialty coffee has increased over the past few years, and several cafes and coffee roasteries are starting to enter the market. Coffee roasting is considered art rather than science that requires a lot of experience from a master roaster. The key parameters used to identify the roast status of the beans are the initial temperature and roasting time from bean samples. The degree of roasting is often the first consideration for consumers when buying coffee. Some of the flavor attributes used to assess coffee are body, aroma, and acidity. Many studies have been done to evaluate the quality of roasted coffee experimentally using different parameters. However, these techniques could not be implemented in real-time and have their limitations. The current need for roasteries is a method of controlling the quality of roasted coffee through risk and a real-time approach. This paper presents a review carried out the methods used to determine roasting degree on risk perspective. This review has covered recent research on coffee roasting evaluation methods on physical, physicochemical, and chemical composition changes.

Penggunaan UV-Vis Spektroskopi dan Kemometrika untuk Uji Keaslian Kopi Codot Lampung

Codot coffee from Tanggamus, Lampung is one of Indonesian specialty coffee with a very limited production. In this research, an authentication study for the Codot ground roasted coffee was conducted using UV-vis spectroscopy and chemometrics. A total of 330 samples of pure and adulterated Codot coffee was prepared. The adulterated Codot coffee samples were intentionally created by adding a regular coffee (non-Codot coffee) into pure Codot coffee samples with three levels of adulterations: low (10-20%), medium (30-40%), and high level (50-60%). All samples were 0,29 mm in particle size. The extraction procedure was performed with hot distilled water (98°C). The spectral data of coffee samples were acquired using a benchtop UV-visible spectrometer in the range of 190-1100 nm using a transmittance mode. The result showed that the pure and adulterated samples could be discriminated along PC1 and PC2 axis. The classification model was developed using LDA with 90,91% of accuracy could be obtained. The LDA model was used to classify the new samples and resulted in a sensitivity (SEN) of 100%, specificity (SPEC) of 76,67%, precision (PREC) of 78,13%, and accuracy (ACC) of 87,27% could be obtained. Using PLS regression, a PLS model was developed to quantify the percentages of Codot coffee adulteration and resulted in high of coefficient of determination both in calibration and validation (R2kal = 0,99 and R2val = 0,98). These results showed that UV-vis spectroscopy and chemometrics are suitable for authentication of Codot specialty coffee with RMSEP = 2,68% and RPD in prediction of 6,49. Keywords: authentication, LDA, PCA, PLS regression, UV-vis spectroscopy

Pendugaan Umur Simpan Bubuk Kopi Arabika Menggunakan Metode Arrhenius dengan Kemasan Aluminium Foil dan Plastik (Polipropilen)

The storage method is one way to maintain coffee quality. Storage with aluminum foil and plastic (PP) packaging is an effective and safe technology to protect coffee grounds. Specialty coffee powder cannot be accepted if the organoleptic score is below 80, for that it is necessary to estimate the shelf life. This study aims to analyze the quality degradation of Bondowoso arabica coffee powder based on specialty standards using the SCAA protocol during storage with aluminum foil packaging and compare it with plastic packaging (PP) and estimated the shelf life of Bondowoso arabica ground coffee products based on flavor value parameters using the arrhenius method. Coffee powder quality degradation with plastic packaging (PP) is faster than aluminum foil packaging. This is because plastic packaging on the fourth day with a temperature of 40°C is not meet specialty standards. The greater the temperature used, the greater the decrease in quality. The shelf life of coffee powder uses aluminum foil packaging, which is 3 days at 40°C, 2 days at 50°C, and 1.3 days at 60°C. Whereas with plastic packaging (PP), the shelf life is shorter, which is 2 days at 40°C, 1.2 days at 50°C and 1 day at 60°C. Keyword: accelerated Shelf-Life Testing (ASLT), aluminum foil, arabica coffee, packaging, shelf