scholarly journals Brew temperature, at fixed brew strength and extraction, has little impact on the sensory profile of drip brew coffee

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Mackenzie E. Batali ◽  
William D. Ristenpart ◽  
Jean-Xavier Guinard
Keyword(s):  
Descriptive Analysis ◽  
Consumer Preference ◽  
Total Dissolved Solids ◽  
Sensory Profile ◽  
Preference Testing ◽  
Time Period ◽  
Sensory Descriptive Analysis ◽  
Percent Extraction ◽  
Key Parameter

Abstract The brew temperature is widely considered a key parameter affecting the final quality of coffee, with a temperature near 93 °C often described as optimal. In particular, drip brewers that do not achieve a minimum brew temperature of 92 °C within a prescribed time period fail their certification. There is little empirical evidence in terms of rigorous sensory descriptive analysis or consumer preference testing, however, to support any particular range of brew temperatures. In this study, we drip-brewed coffee to specific brew strengths, as measured by total dissolved solids (TDS), and extraction yields, as measured by percent extraction (PE), spanning the range of the classic Coffee Brewing Control Chart. Three separate brew temperatures of 87 °C, 90 °C, or 93 °C were tested, adjusting the grind size and overall brew time as necessary to achieve the target TDS and PE. Although the TDS and PE both significantly affected the sensory profile of the coffee, surprisingly the brew temperature had no appreciable impact. We conclude that brew temperature should be considered as only one of several parameters that affect the extraction dynamics, and that ultimately the sensory profile is governed by differences in TDS and PE rather than the brew temperature, at least over the range of temperatures tested.

scholarly journals Sensory profiles of chocolates produced from cocoa cultivars resistant to Moniliophtora Perniciosa

2013 ◽  
Vol 35 (2) ◽  
pp. 594-602 ◽  
Author(s):  
Paula Bacelar Leite ◽  
Eliete da Silva Bispo ◽  
Ligia Regina Radomille de Santana
Keyword(s):  
Purchase Intention ◽  
Sensory Quality ◽  
Descriptive Analysis ◽  
Principal Component ◽  
Sensory Profile ◽  
Quantitative Descriptive Analysis ◽  
Quantitative Descriptive ◽  
Sensory Profiles ◽  
Discriminatory Capacity

The present study evaluated the sensory quality of chocolates obtained from two cocoa cultivars (PH16 and SR162) resistant to Moniliophtora perniciosa mould comparing to a conventional cocoa that is not resistant to the disease. The acceptability of the chocolates was assessed and the promising cultivars with relevant sensory and commercial attributes could be indicated to cocoa producers and chocolate manufacturers. The descriptive terminology and the sensory profile of chocolates were developed by Quantitative Descriptive Analysis (QDA). Ten panelists, selected on the basis of their discriminatory capacity and reproducibility, defined eleven sensory descriptors, their respective reference materials and the descriptive evaluation ballot. The data were analyzed using ANOVA, Principal Component Analysis (PCA) and Tukey's test to compare the means. The results revealed significant differences among the sensory profiles of the chocolates. Chocolates from the PH16 cultivar were characterized by a darker brown color, more intense flavor and odor of chocolate, bitterness and a firmer texture, which are important sensory and commercial attributes. Chocolates from the SR162 cultivar were characterized by a greater sweetness and melting quality and chocolates from the conventional treatment presented intermediate sensory characteristics between those of the other two chocolates. All samples indicated high acceptance, but chocolates from the PH16 and conventional cultivars obtained higher purchase intention scores.

scholarly journals AVALIAÇÃO DO PERFIL SENSORIAL DE AMÊNDOAS DE CUPUAÇU E CACAU TORRADAS UTILIZANDO ANÁLISE DESCRITIVA QUANTITATIVA

2000 ◽  
Vol 18 (2) ◽  
Author(s):  
MARISE BONIFÁCIO QUEIROZ ◽  
NELSON HORÁCIO PEZOA GARCIA
Keyword(s):  
Principal Component Analysis ◽  
Descriptive Analysis ◽  
Principal Component ◽  
The Other ◽  
Sensory Characteristics ◽  
Sensory Profile ◽  
Discriminative Ability ◽  
Tukey Test ◽  
Similarities And Differences ◽  
Sensory Descriptive Analysis

Utilizou-se a análise descritiva quantitativa (ADQ) para desenvolver terminologia descritiva e perfil sensorial de amêndoas de cupuaçu e cacau torradas. Quatro amostras de cupuaçu torradas em forno elétrico rotativo a 150 ºC por 38, 40, 42 e 44 minutos e uma amostra de cacau torrada por 38 minutos foram avaliadas sensorialmente e comparadas entre si. Foram gerados 12 termos que melhor descreveram as similaridades e diferenças entre as amostras, sendo apontados 8 com maior predominância segundo a análise de componente principal (ACP). Equipe de 9 julgadores foi selecionada com base no poder de discriminação (F amostra significativo para p≤0,50), repetibilidade (F repetição não significativo para p>0,05) e concordância de cada um com a equipe. A intensidade de cada descritor ou atributo foi fixada em escala não estruturada de 10 cm, ancorada por extremos que variavam de fraco para forte, baixa para alta, etc. Os dados obtidos foram avaliados estatisticamente (ANOVA, Teste de Tukey e ACP). Observou-se que o cacau torrado apresentou características sensoriais diferentes do cupuaçu, sendo bem mais ácido e amargo, com coloração mais escura e acentuado sabor de chocolate. Já o cupuaçu apresentou sabor de chocolate mais suave e mais doce que o cacau. Abstract Descriptive terminology and sensory profile of cupuasu and cocoa roasted bean were developed by sensory descriptive analysis (QDA). Four cupuasu samples roasted in an electrical rotating oven at 150 ºC and time of 38, 40, 42 and 44 minutes and one cocoa sample roasted for 38 minutes were sensory evaluated and compared. Twelve terms which best described similarities and differences among the samples were generated, being noted eight terms with greater predominance, according to the Principal Component Analysis (PCA). Nine panelists were selected on the basis of their discriminative ability (F sample significant for p≤0.50), reproducibility of judgments (F reproducibility significant for >0.05) and panel agreement. The intensity of each descriptor or attribute were fixed in an 10 cm unstructured scale, anchored in the ends on the terms “weak” and “strong”, “low” and “high”, etc. Data were analyzed by ANOVA, Tukey test and PCA, presenting results in tables and charts. It was observed that roasted cocoa presented different sensory characteristics, being sourer, bitter, darker and with accentuated chocolate taste than cupuasu. In the other hand the cupuasu presented smoother chocolate taste and sweeter than cocoa.

scholarly journals Sensory Profile, Consumer Preference and Chemical Composition of Craft Beers from Brazil

2018 ◽  
Author(s):  
Carmelita da Costa Jardim ◽  
Daidana de Souza ◽  
Isabel Cristina Kasper Machado ◽  
Laura Massochin Nunes Pinto ◽  
Renata Cristina de Souza Ramos ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Descriptive Analysis ◽  
Consumer Preference ◽  
Sensory Profile ◽  
Great Level ◽  
Polyphenol Content ◽  
Lager Yeast ◽  
Quantitative Descriptive Analysis ◽  
Craft Beer ◽  
Craft Beers

The craft beers are outlined as a distinctively flavored, brewed and distributed regionally, using top-fermenting (ale) yeast, bottom-fermenting (lager) yeast or spontaneously fermentation. Craft beers are largely consumed and produced in Brazil and presents great level of polyphenols, which would affect the consumer’s preference. In this way, we analyzed the relation between polyphenols, bitterness and composition of main different styles of craft beers and the consumer´s preference. Six different styles were analyzed according its polyphenol content, bitterness, chemical composition, sensory profile and preference. For preference, a panel with 62 non-trained assessors was used. For sensory profile, the quantitative descriptive analysis was performed, using expert assessors (n = 8). The preferred style was Classic American Pilsner and the style less preferred was Standard American Lager. The craft beer more preferred showed a decreased bitterness (9.52), polyphenol content (0.61 mg EAG/mL), total solids (6.75 ºBrix) and turbidity (7.27 NTU). This beer exhibited reduced sensory notes of malty, fruity, smoked, hoppy and phenolic, but a higher perception of floral, sweet and yeast notes. The bitter attribute has a reduced perception. This study advances understanding the sensory profile and complexity of craft beers styles from Southern Brazilian.

scholarly journals Sensory Profile, Consumer Preference and Chemical Composition of Craft Beers from Brazil

Beverages ◽  
2018 ◽  
Vol 4 (4) ◽  
pp. 106 ◽  
Author(s):  
Carmelita da Costa Jardim ◽  
Daiana de Souza ◽  
Isabel Cristina Kasper Machado ◽  
Laura Massochin Nunes Pinto ◽  
Renata de Souza Ramos ◽  
...  
Keyword(s):  
Chemical Composition ◽  
Descriptive Analysis ◽  
Regional Distribution ◽  
Consumer Preference ◽  
Sensory Profile ◽  
Polyphenol Content ◽  
Lager Yeast ◽  
Spontaneous Fermentation ◽  
Quantitative Descriptive Analysis ◽  
Craft Beers

Craft beers are known for their distinct flavor, brew, and regional distribution. They are made using top-fermenting (ale) yeast, bottom-fermenting (lager) yeast, or through spontaneous fermentation. Craft beers are consumed and produced in Brazil in large quantities. However, they present a high level of polyphenols, which affects consumer preference as they may yield a taste of bitterness to beers. In this study, we analyzed the relationship between polyphenols and bitterness as well as the composition of the main styles of craft beers and consumer preference for them. Six different styles were analyzed according to their polyphenol content, bitterness, chemical composition, sensory profile, and preference. For preference, a panel of 62 untrained assessors was used. For sensory profile, quantitative descriptive analysis was performed using expert assessors (n = 8). The most preferred style was classic American pilsner, and the least preferred was standard American lager. The most preferred style showed less bitterness (9.52) and lower polyphenol content (0.61 mg EAG/mL), total solids (6.75 °Brix), and turbidity (7.27 NTU). This beer also exhibited reduced sensory notes of malty, fruity, smoked, hoppy, and phenolic but a higher perception of floral, sweet, and yeast notes; the bitterness attribute had a reduced perception. This study advances the understanding and complexity of the sensory profile of different styles of craft beers from Southern Brazil.

scholarly journals Traditional Processing, Physicochemical Property, Phytochemical Content, and Microbiological and Sensory Quality of the Yellow “Téa Lémi” Wine Made in the Far-North of Cameroon

2021 ◽  
Vol 2021 ◽  
pp. 1-12
Author(s):  
James Ronald Bayoï ◽  
Yonas Vandi ◽  
Bruno Yaya Foundikou ◽  
Francois-Xavier Etoa
Keyword(s):  
Sensory Quality ◽  
Descriptive Analysis ◽  
Field Investigation ◽  
Sensory Profile ◽  
Soluble Solids ◽  
Quantitative Descriptive Analysis ◽  
Phytochemical Content ◽  
Far North ◽  
Quantitative Descriptive

“Téa Lémi” is a traditional wine made from pummelos by the Kapsiki in the Far-North of Cameroon. Despite its importance as a source of income for the country people, the know-how supporting production of this beverage and its quality attributes still remain unknown. Hence, this study was aimed at describing the processing and quality of “Téa Lémi” produced and marketed in northern Cameroon. The field investigation and the ethnographical technique were used to describe the production process. Physicochemical, phytochemical, and microbiological properties of the beverage were examined using referenced techniques. Quantitative descriptive analysis was used for describing the sensory profile of the wine. Surveys showed that processing of the grapefruit wine is typically artisanal. This can be seen by the uncontrolled addition of some ingredients such as sugar, extract of banana, and honey and a significant fermentation step started by wild, unselected yeasts. The physicochemical analyses revealed that the wine had an acid pH of around 3.84, with a total acidity between 7.72 g/L and 8.79 g/L. The alcohol and soluble solids contents were 14% (v/v) and 12 °Brix, respectively. Total sugar and conductivity values ranged from 57.8 to 96.8 g/L and 573 to 686 μS/cm. Mean contents of polyphenols and flavonoids of 616.4 mg PE/L and 322.5 mg QE/L and an antioxidant capacity of 261.03 mg TE/L have been revealed in the indigenous wine, respectively. The assessment of hygienic quality showed alarming sign of microbiological contamination revealed by total aerobic bacteria and spore-forming bacteria counts beyond the critical level. The good sensory quality (13 out of 20) of the grapefruit wine seemed to be linked to the sweetness (r = 0.999; p < 0.001 ) and odor/flavor (r = 0.997; p < 0.001 ). The beverage has been described by the panel as pale yellow colored, slightly tart, and bitter accompanied by some fruity esters and sweet notes of citrus and caramelized sugar.

scholarly journals Effect of Various Cooking Methods on Technological and Sensory Quality of Atlantic Salmon (Salmo salar)

Foods ◽  
2019 ◽  
Vol 8 (8) ◽  
pp. 323 ◽  
Author(s):  
Głuchowski ◽  
Czarniecka-Skubina ◽  
Wasiak-Zys ◽  
Nowak
Keyword(s):  
Salmo Salar ◽  
Sensory Quality ◽  
Consumer Preference ◽  
Sensory Profile ◽  
Cooking Methods ◽  
Steam Cooking ◽  
Negative Effect ◽  
Raw Fish ◽  
Sous Vide

The aim of the study was to evaluate the effect of heat treatment salmon quality using the sous-vide method (57 °C, 20 min and 63 °C, 80 min) in comparison with traditional methods (steam cooking, roasting). The yield of process and sensory quality (sensory profile, consumer liking) and the color and texture of salmon was measured. Salmon processed with the sous-vide method was characterized by a statistically significantly (p ≤ 0.05) higher yield and water content than the samples prepared by steaming and roasting. Statistically higher (p ≤ 0.05) consumer preference for salmon prepared using higher parameters of the sous-vide process (63 °C, 80 min) compared with low parameters (57 °C, 20 min) was stated. Parameters of the sous-vide processing (57 °C, 20 min) have a negative effect on salmon quality. It was observed that as the temperature and time of the process increased, the intensity of the flavor and odor attributes of cooked fish also increased, while the intensity of raw fish, juiciness, tenderness, and softness decreased. The color of salmon also changed. Based on the results, we recommend the following parameters of process in preparing salmon using the sous-vide method: 63 °C for 80 min.

scholarly journals Sensory profile of Parenica cheese varieties made from pasteurized cow’s milk

10.5219/1024 ◽  
2019 ◽  
Vol 13 (1) ◽  
pp. 76-82 ◽  
Author(s):  
Boris Semjon ◽  
Jana Maľová ◽  
Tatiana Vataščinová ◽  
Pavel Maľa
Keyword(s):  
Sensory Quality ◽  
Statistical Significance ◽  
Descriptive Analysis ◽  
Storage Period ◽  
Sensory Profile ◽  
Cow’S Milk ◽  
Cow's Milk ◽  
Sensory Parameters ◽  
Set Up

Parenica is a steamed, lightly smoked or unsmoked cheese wounded into a roll made from pasteurized cow's milk, with characteristic pronounced fibrous structure of curd. The aim of this work was to set up the sensory profile of smoked and unsmoked parenica cheese varieties made from pasteurized cow's milk and changes in sensory descriptors during 14 days of storage period at the temperature of 4 ±2 °C. Descriptive analysis was carried out by 18 trained assessors, who used a vocabulary of 26 terms to quantitatively describe appearance, aroma, consistency and taste of the experimental samples and also these overall sensory parameters with acceptability. Assessors evaluated the intensity of each descriptor by assigning the score on a 10 points linear scale. Analysis of variance found significant differences between cheese varieties (p <0.05) and the effect of storage period (p <0.05) on sensory quality of experimental parenica cheese varieties. The analysis showed that each sample group in observed representative sensory attributes was significantly different (p <0.05). Multiple factorial analysis showed in parenica cheese samples three selected components that explain more than 69% of the total variation in the dataset at the level of statistical significance p <0.05.

scholarly journals Replacement of Sodium Tripolyphosphate with Iota Carrageenan in the Formulation of Restructured Ostrich Ham

Foods ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 535
Author(s):  
Sumari Schutte ◽  
Jeannine Marais ◽  
Magdalena Muller ◽  
Louwrens C. Hoffman
Keyword(s):  
Sodium Tripolyphosphate ◽  
Profile Analysis ◽  
Descriptive Analysis ◽  
Partial Replacement ◽  
Acceptance Testing ◽  
Texture Profile ◽  
Instrumental Color ◽  
Total Fat ◽  
Sensory Descriptive Analysis

The influence of iota carrageenan (iota-CGN) as a partial replacement of sodium tripolyphosphate (STPP) was investigated on the physical (pH, yield, instrumental color, texture profile analysis), chemical (moisture, protein, total fat, ash, phosphate) and sensory (descriptive analysis, acceptance testing) quality of restructured ostrich ham (95% lean meat plus fat). Treatments consisted of five decreasing levels of STPP (0.70%, 0.53%, 0.35%, 0.18% and 0%) that were simultaneously substituted with five increasing levels of iota-CGN (0%, 0.1%, 0.2%, 0.3% and 0.4%). Cooked yield, hardness, cohesiveness, and gumminess of restructured ostrich ham increased (p ≤ 0.05) with decreasing levels of STPP (and increased levels of iota-CGN). No significant trend in instrumental color measurements or springiness were observed between treatments. Ostrich ham with 0.35% STPP and lower had increased ostrich meat aroma and flavor, while spicy aroma and flavor, mealiness and consumer acceptance decreased. Iota carrageenan can be substituted for STPP (up to 0.35% STPP and 0.2% iota-CGN) to produce reduced STPP ham.

PHYSICO-CHEMICAL ASPECTS OF YAMUNA RIVER AT GOKUL BARRAGE, MATHURA (UP) INDIA

2017 ◽  
Vol 23 (2) ◽  
Author(s):  
AJAY KUMAR RAJAWAT ◽  
PRAVEEN KUMAR
Keyword(s):  
Water Samples ◽  
Suspended Solids ◽  
Total Dissolved Solids ◽  
Tolerance Limit ◽  
Chemical Condition ◽  
Yamuna River ◽  
Dissolved Solids ◽  
Time Period ◽  
Physico Chemical ◽  
Almost All

An attempt has been made to study the Physico-chemical condition of water of Yamuna River at Gokul Barrage, Mathura, (UP). The time period of study was July 2015 to June 2016. Three water samples were selected from different sites in each month for study. The parameters studied were Temperature, Turbidity, pH, DO, BOD, COD, Total Dissolved Solids and Suspended Solids. Almost all the parameters were found above the tolerance limit.

PENGEMBANGAN MEDIA PEMBELAJARAN INTERAKTIF TEKNIK PEMESINAN BUBUT

2020 ◽  
Vol 6 (2) ◽  
pp. 169
Author(s):  
Philip Nababan ◽  
Efendi Napitupulu ◽  
R Mursid
Keyword(s):  
Student Learning ◽  
Learning Outcomes ◽  
Interactive Learning ◽  
Descriptive Analysis ◽  
Student Learning Outcomes ◽  
Field Trials ◽  
Student Responses ◽  
Analysis Techniques ◽  
Qualitative Descriptive

Abstrak: Penelitian ini bertujuan untuk: (1) Mengetahui tanggapan siswa terhadap kualitas media pembelajaran interaktif pada pembelajaran Teknik Pemesinan Bubut. (2) Mengetahui keefektifan media pembelajaran interaktif pada pembelajaran Teknik Pemesinan Bubut pada siswa program keahlian Teknik Pemesinan. Jenis penelitian ini adalah penelitian pengembangan. Data tentang kualitas produk pengembangan ini dikumpulkan dengan angket dan dianalisis dengan teknik analisis deskriptif kualiatatif. Hasil penelitian menunjukkan bahwa; (1) uji ahli materi pelajaran Teknik Pemesinan Bubut berada pada kualifikasi sangat baik (88,92%), (2) uji ahli desain pembelajaran berada pada kualifikasi sangat baik (85,21%), (3) uji ahli rekayasa perangkat lunak berada pada kualifikasi sangat baik (84,03%), (4) uji coba perorangan berada pada kualifikasi sangat baik (88,75%), (5) uji coba kelompok kecil berada pada kualifikasi sangat baik (91,35%) dan (5) uji coba lapangan berada pada kualifikasi sangat baik (88,31%). Hasil pengujian hipotesis membuktikan bahwa terdapat perbedaan antara hasil belajar siswa yang menggunakan media pembelajaran interaktif  dengan hasil belajar siswa yang menggunakan buku teks. Hal ini ditunjukkan dengan hasil pengolahan data diperoleh  thitung sebesar 4,68 dan ttabel sebesar 1,67 pada taraf kepercayaan 95 persen. Maka diperoleh bahwa thitung> ttabel. Disimpulkan bahwa  hasil belajar siswa yang menggunakan media pembelajaran interaktif dengan efektifitas sebesar 72,77 %. lebih tinggi dari hasil belajar siswa yang diajar dengan pembelajaran menggunakan buku teks dengan efektifitas sebesar 62,13%. Kata Kunci: media pembelajaran interaktif, teknik pemesinan bubut Abstract: This study aims to: (1) Determine student responses to the quality of interactive learning media on learning Lathe Machining Techniques. (2) Knowing the effectiveness of interactive learning media on learning of Machining Lathe in students of Machining Engineering expertise program. This type of research is development research. Data about the quality of this development product was collected by a questionnaire and analyzed by qualitative descriptive analysis techniques. The results showed that; (1) Lathe machining engineering subject matter expert test is in very good qualification (88.92%), (2) learning design expert test is in very good qualification (85.21%), (3) software engineering expert test is in in very good qualifications (84.03%), (4) individual trials were in very good qualifications (88.75%), (5) small group trials were in very good qualifications (91.35%) and (5 ) field trials are in very good qualifications (88.31%). Hypothesis testing results prove that there are differences between student learning outcomes using interactive learning media with student learning outcomes using textbooks. This is indicated by the results of data processing obtained by tcount of 4.68 and ttable of 1.67 at a confidence level of 95 percent. Then it is obtained that tcount> ttable. It was concluded that student learning outcomes using interactive learning media with an effectiveness of 72.77%. higher than student learning outcomes taught by learning to use textbooks with an effectiveness of 62.13%. Keywords: interactive learning media, lathe machining techniques

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