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McCabe AK, Keyes JK, Hemetsberger H, Kurr CV, Albright B, Ward MG, McKinley ML, Breezley SJ, Cole CA. Aroma Profile Development in Beer Fermented with Azacca, Idaho-7, and Sultana Hops. Molecules 2023; 28:5802. [PMID: 37570773 PMCID: PMC10421000 DOI: 10.3390/molecules28155802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2023] [Revised: 07/19/2023] [Accepted: 07/27/2023] [Indexed: 08/13/2023] Open
Abstract
Hops are among the most costly and environmentally impactful raw materials used in brewing, yet they play a crucial role in the aroma of beer. However, predicting beer aroma based on hop variety or hopping method remains arduous. This is partly because hop oils are unique for each hop variety, and they may be biotransformed by yeast enzymes during fermentation. Even slight molecular structure modifications can dramatically affect the organoleptic properties of beer. Through combined chemical and sensory analysis of dry-hopped beers prepared with different hop varieties (Azacca, Idaho-7, and Sultana), this work aimed to profile the aromas and the overall biotransformation processes taking place during fermentation. A total of 51 volatile organic compounds (VOCs) were semi-quantified and monitored: 19 esters, 13 sesquiterpenes, 7 ketones, 7 alcohols, 4 monoterpenes, and 1 volatile acid. There were significant similarities in the measured analytes and perceived aromas of these beers, but one hop variety (Sultana) delivered an increased quantity of unique aromas and an increased concentration of volatiles in the headspace for the same quantity of hop pellets added. This work provides practical information to brewers who utilize hops in beer production.
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Affiliation(s)
- Anna K. McCabe
- Department of Chemistry & Biochemistry, Fort Lewis College, 1000 Rim Drive, Durango, CO 81301, USA; (A.K.M.); (J.K.K.); (M.G.W.); (M.L.M.)
| | - Jasmine K. Keyes
- Department of Chemistry & Biochemistry, Fort Lewis College, 1000 Rim Drive, Durango, CO 81301, USA; (A.K.M.); (J.K.K.); (M.G.W.); (M.L.M.)
| | - Heidi Hemetsberger
- Ska Brewing Company, 225 Girard St., Durango, CO 81303, USA; (H.H.); (C.V.K.); (B.A.); (S.J.B.)
| | - Chris V. Kurr
- Ska Brewing Company, 225 Girard St., Durango, CO 81303, USA; (H.H.); (C.V.K.); (B.A.); (S.J.B.)
| | - Bryan Albright
- Ska Brewing Company, 225 Girard St., Durango, CO 81303, USA; (H.H.); (C.V.K.); (B.A.); (S.J.B.)
| | - Michael G. Ward
- Department of Chemistry & Biochemistry, Fort Lewis College, 1000 Rim Drive, Durango, CO 81301, USA; (A.K.M.); (J.K.K.); (M.G.W.); (M.L.M.)
| | - Megan L. McKinley
- Department of Chemistry & Biochemistry, Fort Lewis College, 1000 Rim Drive, Durango, CO 81301, USA; (A.K.M.); (J.K.K.); (M.G.W.); (M.L.M.)
| | - Steven J. Breezley
- Ska Brewing Company, 225 Girard St., Durango, CO 81303, USA; (H.H.); (C.V.K.); (B.A.); (S.J.B.)
| | - Callie A. Cole
- Department of Chemistry & Biochemistry, Fort Lewis College, 1000 Rim Drive, Durango, CO 81301, USA; (A.K.M.); (J.K.K.); (M.G.W.); (M.L.M.)
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Liu L, Zhao PT, Hu CY, Tian D, Deng H, Meng YH. Screening low-methanol and high-aroma produced yeasts for cider fermentation by transcriptive characterization. Front Microbiol 2022; 13:1042613. [PMID: 36439849 PMCID: PMC9691974 DOI: 10.3389/fmicb.2022.1042613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2022] [Accepted: 10/27/2022] [Indexed: 11/12/2022] Open
Abstract
The commercial active dry yeast strains used for cider production in China are far behind the requirements of the cider industry development in recent decades. In this study, eight yeasts, including Saccharomyces cerevisiae, Schizosaccharomyces pombe, Pichia bruneiensis, and Pichia kudriavzevii, were screened and assessed by growth performance, methanol production, aroma analysis, and their transcriptive characterization. Saccharomyces cerevisiae strains WFC-SC-071 and WFC-SC-072 were identified as promising alternatives for cider production. Strains WFC-SC-071 and WFC-SC-072 showed an excellent growth capacity characterized by 91.6 and 88.8% sugar utilization, respectively. Methanol production by both strains was below 200 mg/L. Key aroma compounds imparting cider appreciably characteristic aroma increased in cider fermented by strains WFC-SC-071 and WFC-SC-072. RT-qPCR analysis suggested that most genes associated with growth capacity, carbohydrate uptake, and aroma production were upregulated in WFC-SC-071 and WFC-SC-072. Overall, two Saccharomyces cerevisiae strains are the optimal starters for cider production to enable the diversification of cider, satisfy the differences in consumer demand, and promote cider industry development.
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Affiliation(s)
- Liang Liu
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xian, China
| | - Peng Tao Zhao
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xian, China
| | - Ching Yuan Hu
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xian, China
- Department of Human Nutrition, Food and Animal Sciences, College of Tropical Agriculture and Human Resources, Honolulu, HI, United States
| | - Dan Tian
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xian, China
| | - Hong Deng
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xian, China
- *Correspondence: Hong Deng,
| | - Yong Hong Meng
- The Engineering Research Center for High-Valued Utilization of Fruit Resources in Western China, Ministry of Education, National Research and Development Center of Apple Processing Technology, College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xian, China
- Yong Hong Meng,
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Special Issue on Application of Instrumental Methods for Food and Food By-Products Analysis. APPLIED SCIENCES-BASEL 2022. [DOI: 10.3390/app12083888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The application of various analytical procedures and methods determining the properties and safety of food and food constituents is a particularly important topic when dealing with food and food by-product analyses [...]
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Chegukrishnamurthi M, Shekh A, Ravi S, Narayana Mudliar S. Volatile organic compounds involved in the communication of microalgae-bacterial association extracted through Headspace-Solid phase microextraction and confirmed using gas chromatography-mass spectrophotometry. BIORESOURCE TECHNOLOGY 2022; 348:126775. [PMID: 35104650 DOI: 10.1016/j.biortech.2022.126775] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/27/2021] [Revised: 01/21/2022] [Accepted: 01/22/2022] [Indexed: 06/14/2023]
Abstract
In the present study, bacterial mixture (Rhizobium and Agrobacterium) and axenic Chlorella were cultivated individually, in a mixed (co-cultured) form, and through headspace connections to study volatile organic compounds (VOCs) profile and their effect on growth. Results indicated that VOCs produced by the axenic microalgae and microalgae co-cultured with bacteria were significantly different. Axenic Chlorella predominantly produced a flavouring organic compound 2-pentadecanone (69.54%), bacterial mixed culture produced 1-decanone, 1,2,3-butanetriol, and quinoline (15-20%), and direct co-culturing of Chlorella with bacteria predominantly produced 2-pentadecanone (32.4 %). When they were allowed to communicate distantly through headspace connection, highly diversified VOCs in large numbers but low quantities were noted, predominantly 1,2-propanediol (28.82 %). In addition, growth of the co-cultured Chlorella was 1.5 times higher, while Chlorella in headspace connection with bacterial mixture exhibited ∼ 3.2 times increase in growth compared to the axenic Chlorella, indicating the essential role of VOCs in growth and communication.
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Affiliation(s)
- Madhubalaji Chegukrishnamurthi
- Plant Cell Biotechnology Department, CSIR- Central Food Technological Research Institute, Mysuru 570020, Karnataka, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Ajam Shekh
- Plant Cell Biotechnology Department, CSIR- Central Food Technological Research Institute, Mysuru 570020, Karnataka, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sarada Ravi
- Plant Cell Biotechnology Department, CSIR- Central Food Technological Research Institute, Mysuru 570020, Karnataka, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India
| | - Sandeep Narayana Mudliar
- Plant Cell Biotechnology Department, CSIR- Central Food Technological Research Institute, Mysuru 570020, Karnataka, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad 201002, India.
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