scholarly journals The Effect of Roast Development Time Modulations on the Sensory Profile and Chemical Composition of the Coffee Brew as Measured by NMR and DHS-GC–MS

Beverages ◽  
2020 ◽  
Vol 6 (4) ◽  
pp. 70
Author(s):  
Jesper Alstrup ◽  
Mikael Agerlin Petersen ◽  
Flemming Hofmann Larsen ◽  
Morten Münchow
Keyword(s):  
Development Time ◽  
Descriptive Analysis ◽  
Sensory Profile ◽  
Gas Chromatography Mass Spectrometry ◽  
Significant Shift ◽  
Sensory Experiences ◽  
Sensory Effects ◽  
Roasting Process ◽  
Short Development Time ◽  
Specialty Coffee

The specialty coffee industry is growing and, as a result, there is an accelerated interest in modulating roast profiles to present customers with new and diverse sensory experiences. The present study investigates the chemical and sensory effects of subtle variations in the ‘development time’ phase of the coffee roasting process. Four roast profiles were studied through sensory descriptive analysis (DA), gas chromatography–mass spectrometry (GC–MS), and nuclear magnetic resonance (NMR). Multivariate analysis showed clear separation of DA, GC–MS, and NMR data. A prolonged development time facilitated a statistically significant shift in the chemical and sensory profile of the coffee. The findings suggest that a short development time increases the fruity, sweet and acidic characteristics of the coffee, whereas a longer development time shifts the balance towards a more roasty, nutty, and bitter profile. The results provide evidence that supports the effect of subtle roast profile modulations. This lays a strong foundation for the inclusion of development time as a critical control parameter in the certification system of the Specialty Coffee Association, quality control, and product development strategies.

scholarly journals Roasting Conditions and Coffee Flavor: A Multi-Study Empirical Investigation

Beverages ◽  
2020 ◽  
Vol 6 (2) ◽  
pp. 29 ◽  
Author(s):  
Morten Münchow ◽  
Jesper Alstrup ◽  
Ida Steen ◽  
Davide Giacalone
Keyword(s):  
Development Time ◽  
Empirical Investigation ◽  
Descriptive Analysis ◽  
Steam Pressure ◽  
Enzymatic Browning ◽  
Relative Importance ◽  
Roasting Process ◽  
Two Phases ◽  
The Moment ◽  
Sensory Descriptive Analysis

This research investigates the relative importance of two roasting parameters—colour (i.e., roast degree) and time—on the sensory properties of coffee. The paper draws on data from eight studies conducted using sensory descriptive analysis with trained (in six studies) or semi-trained (in two studies) assessors, focusing on a common set of attributes. The results indicated that, while both parameters significantly affected coffee flavour, colour was the stronger predictor of the two. The effects direction for both colour and time were similar and related to the rate of non-enzymatic browning, with darker roasts/longer roasting times associated with an increase in bitterness and a decrease in acidity, fruitiness, and sweetness. With respect to roasting time, we distinguished two phases, “time to first crack”, corresponding to the time between the onset of roasting and the moment where the accumulated steam pressure causes the beans to crack, and “development time”, corresponding to the time elapsed from the first crack to the end of the roasting process. The results clearly indicated that, under the same colour, time variation also influenced flavour, and in particular, development time, rather than time to first crack, had the largest effect on coffee flavour.

scholarly journals Aroma Profile of Arabica Coffee Based on Ohmic Fermentation

2021 ◽  
Author(s):  
Reta Reta ◽  
Salengke Salengke ◽  
Mursalim Mursalim ◽  
Junaedi Muhidong ◽  
Sitti Nurmiah ◽  
...  
Keyword(s):  
Descriptive Analysis ◽  
Processing System ◽  
Gas Chromatography Mass Spectrometry ◽  
Aroma Compound ◽  
Quantitative Descriptive Analysis ◽  
Fermentation Time ◽  
Aromatic Components ◽  
Specialty Coffee ◽  
Quantitative Descriptive

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.

Food Matters

2017 ◽  
Vol 46 (2) ◽  
pp. 3-8
Author(s):  
Martha Finch
Keyword(s):  
Food Studies ◽  
Religious Group ◽  
Cultural Group ◽  
Central Theme ◽  
Common Food ◽  
Sensory Experiences ◽  
Sensory Effects

Each week in my religion and food course during Spring 2016, a student or I brought foods related to the religious group we were studying into the classroom for all to try. With the first dish they tasted, students asked, “So what makes this food ‘religious’?” This question formed the central theme throughout the semester as we wrestled with what religion is in the context of food and foodways: the network of material aspects (food itself; practices like growing, distributing, cooking, eating; sensory experiences such as taste) and conceptual aspects (ideas, meanings, metaphors, symbols, values such as taste) of food in a particular social/cultural group. The familiar and unfamiliar foods elicited visceral reactions from students. This essay argues that paying closer attention to religion as an independent interpretive category and especially to food itself, as a material agent eliciting powerful sensory effects that precede religious ideas and enable those ideas, provides an alternative to dependence on common food studies’ interpretive categories and on the Protestant-influenced focus on food as abstracted symbol or metaphor of ‘meaning.’

scholarly journals Evaluation of 3-Methylbutanoic Acid Methyl Ester as a Factor Influencing Flavor Cleanness in Arabica Specialty Coffee

2021 ◽  
Vol 11 (12) ◽  
pp. 5413
Author(s):  
Keiko Iwasa ◽  
Harumichi Seta ◽  
Yoshihide Matsuo ◽  
Koichi Nakahara
Keyword(s):  
Methyl Ester ◽  
Methyl Esters ◽  
Acid Methyl Ester ◽  
Chemical Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Arabica Coffee ◽  
Acid Methyl ◽  
Coffee Brew ◽  
Coffee Beans ◽  
Specialty Coffee

This paper reports on the chemical compounds in arabica coffee beans with a high Specialty Coffee Association (SCA) cupping score, especially those in specialty coffee beans. We investigated the relationship between the chemical compounds and cupping scores by considering 16 types of Coffea arabica (arabica coffee) beans from Guatemala (SCA cupping score of 76.5–89.0 points). Non-targeted gas chromatography-mass spectrometry-based chemometric profiling indicated that specialty beans with a high cupping score contained considerable amounts of methyl-esterified compounds (MECs), including 3-methylbutanoic acid methyl ester (3-MBM), and other fatty acid methyl esters. The effect of MECs on flavor quality was verified by spiking the coffee brew with 3-MBM, which was the top-ranked component, as obtained through a regression model associated with cupping scores. Notably, 3-MBM was responsible for the fresh-fruity aroma and cleanness of the coffee brew. Although cleanness is a significant factor for specialty beans, the identification of compounds that contribute to cleanness has not been reported in previous research. The chemometric profiling approach coupled with spiking test validation will improve the identification and characterization of 3-MBM commonly found in arabica specialty beans. Therefore, 3-MBM, either alone or together with MECs, can be used as a marker in coffee production.

scholarly journals Australian Smokers’ Sensory Experiences and Beliefs Associated with Menthol and Non-Menthol Cigarettes

2021 ◽  
Vol 18 (11) ◽  
pp. 5501
Author(s):  
Serafino Mancuso ◽  
Emily Brennan ◽  
Kimberley Dunstone ◽  
Amanda Vittiglia ◽  
Sarah Durkin ◽  
...  
Keyword(s):  
Sensory Experience ◽  
Tobacco Products ◽  
Sensory Experiences ◽  
Online Panel ◽  
Menthol Cigarettes ◽  
Sensory Effects ◽  
New Information ◽  
Level Of Risk

Many current smokers incorrectly believe that menthol cigarettes are less harmful, likely due to the biological and sensory effects of menthol, which can lead smokers to have favourable sensory experiences. In this study, we measured the extent to which Australian smokers associate certain sensory experiences with smoking menthol and non-menthol cigarettes, and their beliefs about how damaging and enjoyable they find cigarettes with each of these sensory experiences. A sample of 999 Australian 18–69-year-old weekly smokers was recruited from a non-probability online panel; this study focuses on the 245 respondents who currently smoked menthol cigarettes at least once per week. Current menthol smokers were four to nine times more likely to experience menthol rather than non-menthol cigarettes as having favourable sensory experiences, including feeling smooth, being soothing on the throat, fresh-tasting and clean-feeling. Menthol smokers perceived cigarettes with these favourable sensations as less damaging and more enjoyable than cigarettes with the opposite more aversive sensory experience. Efforts to correct these misperceptions about risk will likely require messages that provide new information to help smokers understand that these sensations do not indicate a lower level of risk. Banning menthol in tobacco products—as has recently been done in some nations—would also be a timely and justified strategy for protecting consumers.

scholarly journals Comparison of Three Approaches to Assess the Flavour Characteristics of Scotch Whisky Spirit

2021 ◽  
Vol 11 (4) ◽  
pp. 1410
Author(s):  
Martina Daute ◽  
Frances Jack ◽  
Irene Baxter ◽  
Barry Harrison ◽  
John Grigor ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Descriptive Analysis ◽  
Analytical Techniques ◽  
Gas Chromatography Mass Spectrometry ◽  
Multiple Factor Analysis ◽  
Quantitative Descriptive Analysis ◽  
Yeast Strains ◽  
Quantitative Descriptive ◽  
Scotch Whisky ◽  
Multiple Factor

This study compared the use of three sensory and analytical techniques: Quantitative Descriptive Analysis (QDA), Napping, and Gas Chromatography-Mass Spectrometry (GC-MS) for the assessment of flavour in nine unmatured whisky spirits produced using different yeasts. Hierarchical Multiple Factor Analysis (HMFA) showed a similar pattern of sample discrimination (RV scores: 0.895–0.927) across the techniques: spirits were mostly separated by their Alcohol by Volume (ABV). Low ABV spirits tended to have heavier flavour characteristics (feinty, cereal, sour, oily, sulphury) than high ABV spirits, which were lighter in character (fruity, sweet, floral, solventy, soapy). QDA differentiated best between low ABV spirits and GC-MS between high ABV spirits, with Napping having the lowest resolution. QDA was time-consuming but provided quantitative flavour profiles of each spirit that could be readily compared. Napping, although quicker, gave an overview of the flavour differences of the spirits, while GC-MS provided semi-quantitative ratios of 96 flavour compounds for differentiating between spirits. Ester, arenes and certain alcohols were found in higher concentrations in high ABV spirits and other alcohols and aldehydes in low ABV spirits. The most comprehensive insights on spirit flavour differences produced by different yeast strains are obtained through the application of a combination of approaches.

Minimum-wage Connoisseurship and Everyday Boundary Maintenance: Brewing Inequality in Third Wave Coffee

2020 ◽  
Vol 44 (4) ◽  
pp. 469-491
Author(s):  
Brian Ott
Keyword(s):  
Minimum Wage ◽  
The United States ◽  
Third Wave ◽  
Niche Markets ◽  
Sensory Experiences ◽  
Production And Consumption ◽  
Boundary Maintenance ◽  
Consumption Practices ◽  
Specialty Coffee ◽  
Additional Payment

The shift from Fordism to post-Fordism in the United States introduced vast changes to production and consumption practices. In contrast to the commercial enterprises of Fordism, the post-Fordist economy relies on fast-changing tastes and small, niche markets along with new cultural forms for inducing consumption and anchoring identities. This article focuses on the specialty (or “third wave”) coffee industry, where coffee is treated similarly to wine, which I argue is emblematic of a post-Fordist economy. Relying on data collected from over a year of ethnographic fieldwork, I argue that the specialty coffee industry represents a qualitative shift in the coffee industry, one that produces a new niche market and consumer base that commoditizes sensory experiences as embodied class dispositions. I argue that baristas perform a kind of labor that I term “minimum-wage connoisseurship,” where they receive minimum wage (and tips) along with additional payment in cultural and social capital that elevates their status as well as manufacture’s consent for dedicating their time, in and outside of work, and their bodies to the organization.

scholarly journals Role of Sensory Evaluation in Consumer Acceptance of Plant-Based Meat Analogs and Meat Extenders: A Scoping Review

Foods ◽  
2020 ◽  
Vol 9 (9) ◽  
pp. 1334 ◽  
Author(s):  
Martina Fiorentini ◽  
Amanda J. Kinchla ◽  
Alissa A. Nolden
Keyword(s):  
Sensory Evaluation ◽  
Descriptive Analysis ◽  
Sensory Attributes ◽  
Research Field ◽  
Consumer Acceptance ◽  
Sensory Profile ◽  
Original Research ◽  
Sustainable Food ◽  
Quantitative Results ◽  
Analytical Approaches

Growing demand for sustainable food has led to the development of meat analogs to satisfy flexitarians and conscious meat-eaters. Successful combinations of functional ingredients and processing methods result in the generation of meat-like sensory attributes, which are necessary to attract non-vegetarian consumers. Sensory science is a broader research field used to measure and interpret responses to product properties, which is not limited to consumer liking. Acceptance is evaluated through hedonic tests to assess the overall liking and degree of liking for individual sensory attributes. Descriptive analysis provides both qualitative and quantitative results of the product’s sensory profile. Here, original research papers are reviewed that evaluate sensory attributes of meat analogs and meat extenders through hedonic testing and/or descriptive analysis to demonstrate how these analytical approaches are important for consumer acceptance. Sensory evaluation combined with instrumental measures, such as texture and color, can be advantageous and help to improve the final product. Future applications of these methods might include integration of sensory tests during product development to better direct product processing and formulation. By conducting sensory evaluation, companies and researchers will learn valuable information regarding product attributes and overall liking that help to provide more widely accepted and sustainable foods.

scholarly journals Sensory Profiles and Lactic Acid Bacteria Density of Tape Ketan and Tape Singkong in Bogor

2019 ◽  
Vol 38 (3) ◽  
pp. 265 ◽  
Author(s):  
Uswatun Hasanah ◽  
Haqqifizta Ratihwulan ◽  
Lilis Nuraida
Keyword(s):  
Lactic Acid ◽  
Data Analysis ◽  
Lactic Acid Bacteria ◽  
Descriptive Analysis ◽  
Starter Culture ◽  
Analysis Data ◽  
Sensory Profile ◽  
Quantitative Descriptive Analysis ◽  
Quantitative Descriptive ◽  
Home Industries

Tape ketan (fermented glutinous rice) and tape singkong (fermented cassava) are traditional Indonesian foods produced by fermenting carbohydrate sources using ragi as starter culture. Those products known to contain high number of lactic acid bacteria (LAB). The purpose of the study was to evaluate the sensory characteristics of tape ketan and tape singkong from different household industry in Bogor, to identify the sensory profile, and to evaluate the correlation between LAB density and sensory attribute. The research was started by survey to household tape industries, followed by sensory analysis of rating hedonic and Quantitative Descriptive Analysis (QDA), and LAB analysis. Data analysis of rating hedonic was done by ANOVA and post-hoc Duncan test, while data analysis of QDA was done by Principle Component Analysis (PCA). Samples of tape ketan were taken from two different home industries (BK and LK), while samples of tape singkong were taken from four different home industries (CT, NG, SH, TS). Hedonic rating test showed that the most preferred sample overall was tape ketan BK and tape singkong CT. QDA results showed that tape ketan BK was characterized by its sweetness, rice-like aroma, rice-like taste, and texture, while tape ketan LK was characterized by alcoholic aroma, alcoholic taste, sourness, and color. Tape singkong NG were characterized by sour aroma, alcoholic aroma, alcoholic taste, and color. Specific characteristic of tape singkong CT was bitterness and bitter aftertaste, SH was sweetness, and TS was texture. LAB of tape ketan BK (8,5 log cfu/g) was higher than LK (7,9 log cfu/g). Tape singkong with highest density of LAB was TS (8,1 log cfu/g), followed by CT (7,2 log cfu/g), NG (7,0 log cfu/g), and SH (6,5 log cfu/g). There was no correlation between the density of LAB and descriptive score of sourness, alcoholic taste, and sweetness.

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