1
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Kane DL, Burke B, Diaz M, Wolf C, Fonzi WA. Lethal metabolism of Candida albicans respiratory mutants. PLoS One 2024; 19:e0300630. [PMID: 38578754 PMCID: PMC10997084 DOI: 10.1371/journal.pone.0300630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2023] [Accepted: 03/01/2024] [Indexed: 04/07/2024] Open
Abstract
The destructive impact of fungi in agriculture and animal and human health, coincident with increases in antifungal resistance, underscores the need for new and alternative drug targets to counteract these trends. Cellular metabolism relies on many intermediates with intrinsic toxicity and promiscuous enzymatic activity generates others. Fuller knowledge of these toxic entities and their generation may offer opportunities of antifungal development. From this perspective our observation of media-conditional lethal metabolism in respiratory mutants of the opportunistic fungal pathogen Candida albicans was of interest. C. albicans mutants defective in NADH:ubiquinone oxidoreductase (Complex I of the electron transport chain) exhibit normal growth in synthetic complete medium. In YPD medium, however, the mutants grow normally until early stationary phase whereupon a dramatic loss of viability occurs. Upwards of 90% of cells die over the subsequent four to six hours with a loss of membrane integrity. The extent of cell death was proportional to the amount of BactoPeptone, and to a lesser extent, the amount of yeast extract. YPD medium conditioned by growth of the mutant was toxic to wild-type cells indicating mutant metabolism established a toxic milieu in the media. Conditioned media contained a volatile component that contributed to toxicity, but only in the presence of a component of BactoPeptone. Fractionation experiments revealed purine nucleosides or bases as the synergistic component. GC-mass spectrometry analysis revealed acetal (1,1-diethoxyethane) as the active volatile. This previously unreported and lethal synergistic interaction of acetal and purines suggests a hitherto unrecognized toxic metabolism potentially exploitable in the search for antifungal targets.
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Affiliation(s)
- D. Lucas Kane
- Department of Chemistry and Medicinal Chemistry Shared Resource, Georgetown University, Washington, DC, United States of America
| | - Brendan Burke
- Department of Microbiology, Georgetown University, Washington, DC, United States of America
| | - Monica Diaz
- Department of Microbiology, Georgetown University, Washington, DC, United States of America
| | - Christian Wolf
- Department of Chemistry and Medicinal Chemistry Shared Resource, Georgetown University, Washington, DC, United States of America
| | - William A. Fonzi
- Department of Microbiology, Georgetown University, Washington, DC, United States of America
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2
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Wang H, Shao Z, Shi X, Tang Z, Sun B. Rapidly detecting the carcinogen acetaldehyde: preparation and application of a flower-like MoS 2 cataluminescence sensor at low working temperature. ANALYTICAL METHODS : ADVANCING METHODS AND APPLICATIONS 2023; 15:5620-5629. [PMID: 37855720 DOI: 10.1039/d3ay01307c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2023]
Abstract
In this paper, a cataluminescence (CTL) gas sensor based on flower-like molybdenum disulfide (MoS2) is developed. The experimental results show that it has high sensitivity and selectivity to acetaldehyde. The CTL sensor has the advantage of fast response; the response time is about 3 s and the recovery time is about 40 s. The optimal working temperature of this sensor is 174 °C, which is lower than that of the CTL sensors used for acetaldehyde detection in many other reports. Under the optimized conditions, the CTL signal intensity shows a good linear relationship with acetaldehyde concentration (R2 = 0.9991) within the concentration range of 40-2000 ppm, and the detection limit (LOD) is 3.75 ppm. The selectivity experiment results show that the sensor has an obvious response to acetaldehyde and a very weak response to acetic acid, and has no response to many other VOCs (ether, cyclohexane, butyl ether, carbon tetrachloride, ethanol, toluene, formaldehyde, glycerol, trichloromethane and xylene). After 8 repeated measurements for four weeks, the relative standard deviation (RSD) of the CTL sensor is 1.03%, indicating that it has good reproducibility and stability, which shows that the CTL sensor has a promising prospect for the detection of acetaldehyde.
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Affiliation(s)
- Hongyan Wang
- Department of Radiation Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China.
| | - Ziyu Shao
- Department of Radiation Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China.
| | - Xiaoqi Shi
- Department of Radiation Oncology, The First Affiliated Hospital of Anhui Medical University, Hefei 230022, China.
| | - Zhuo Tang
- Engineering Research Center of Building Energy Efficiency Control and Evaluation of the Ministry of Education, College of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China.
| | - Bai Sun
- Engineering Research Center of Building Energy Efficiency Control and Evaluation of the Ministry of Education, College of Environment and Energy Engineering, Anhui Jianzhu University, Hefei 230601, China.
- Nano-Materials and Environmental Detection Laboratory, Hefei Institute of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
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3
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Aguiar D, Pereira AC, Marques JC. Assessment of the Prediction Power of Forced Ageing Methodology on Lager Beer Aldehyde Evolution during Maritime Transportation. Molecules 2023; 28:molecules28104201. [PMID: 37241941 DOI: 10.3390/molecules28104201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 05/05/2023] [Accepted: 05/17/2023] [Indexed: 05/28/2023] Open
Abstract
The globalisation of the beer market forces brewers to have methodologies that rapidly evaluate the evolution of beer flavour stability. Commonly used forced ageing methods have limitations since temperature and transportation conditions (temperature, vibrations, long-distance travel, and other factors) impact beer quality. This study assessed the prediction power of a forced ageing methodology on the evolution of aldehydes during maritime transportation across four sample groups (maritime transport, storage simulation, and three ageing periods: 7, 21, and 28 days at 37 °C), which differed in their bottle-opening system (either crown cap or ring pull cap). The results revealed that forced ageing up to 28 days could estimate the evolution of phenylacetaldehyde, 3-methylbutanal, 2-methylpropanal, and hexanal during maritime transport. In contrast, the benzaldehyde content was consistently underestimated, on average, 0.8 times lower. In general, the ageing conditions significantly favoured the formation or liberation from a bound state, up to 2.2 times higher, of trans-2-nonenal, acetaldehyde, and 5-hydroximethylfurfural in comparison to the levels registered on exportation simulation beers. Moreover, forced-aged beers with ring pull caps developed quantifiable levels of nonanal and increased phenylacetaldehyde, benzaldehyde, and acetaldehyde content over time. Moreover, thermal stress induced a continuous increase in the extent of beer staling, up to seven times higher, in most samples.
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Affiliation(s)
- Dayana Aguiar
- Faculty of Exact Sciences and Engineering, University of Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
- ISOPlexis, Centre for Sustainable Agriculture and Food Technology, University of Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
| | - Ana C Pereira
- ISOPlexis, Centre for Sustainable Agriculture and Food Technology, University of Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
- Chemical Process Engineering and Forest Products Research Centre, Department of Chemical Engineering, University of Coimbra, Pólo II-Rua Sílvio Lima, 3030-790 Coimbra, Portugal
- Institute of Nanostructures, Nanomodelling and Nanofabrication (I3N), University of Aveiro, 3810-193 Aveiro, Portugal
| | - José C Marques
- Faculty of Exact Sciences and Engineering, University of Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
- ISOPlexis, Centre for Sustainable Agriculture and Food Technology, University of Madeira, Campus da Penteada, 9020-105 Funchal, Portugal
- Institute of Nanostructures, Nanomodelling and Nanofabrication (I3N), University of Aveiro, 3810-193 Aveiro, Portugal
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Paszkot J, Gasiński A, Kawa-Rygielska J. Evaluation of volatile compound profiles and sensory properties of dark and pale beers fermented by different strains of brewing yeast. Sci Rep 2023; 13:6725. [PMID: 37185768 PMCID: PMC10130024 DOI: 10.1038/s41598-023-33246-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Accepted: 04/10/2023] [Indexed: 05/17/2023] Open
Abstract
To evaluate the differences in the volatile compound profile of dark and pale beers fermented by different strains of brewer's yeast, gas chromatography with flame ionization detection and gas chromatography mass spectrometry analysis of eight beers was carried out. The prevalent group of compounds in all the beers analysed were alcohols (56.41-72.17%), followed by esters (14.58-20.82%), aldehydes (8.35-20.52%), terpenes and terpenoids (1.22-6.57%) and ketones (0.42-1.00%). The dominant higher alcohols were 2-methylpropan-1-ol, 3-methylbutanol, phenethyl alcohol, among aldehydes furfural, decanal, nonanal, and among esters ethyl acetate, phenylethyl acetate and isoamyl acetate. Beers fermented by the top-fermenting yeast Saccharomyces cerevisiae var. diastaticus had the highest volatile content. The addition of dark malt in wort production process had no effect on the total content of volatiles, but for some beers it caused changes in the total content of esters, terpenes and terpenoids. Variations in the total volatile content between beers fermented by different yeast strains are mainly due to esters and alcohols identified. Sensory analysis of beers allowed us to identify the characteristics affected by the addition of dark speciality malts in the production of wort and yeast strains used in the fermentation process.
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Affiliation(s)
- Justyna Paszkot
- Department of Fermentation and Cereals Technology, Faculty of Biotechnology and Food Science, Wrocław University of Environmental and Life Sciences, 51-630, Wrocław, Poland.
| | - Alan Gasiński
- Department of Fermentation and Cereals Technology, Faculty of Biotechnology and Food Science, Wrocław University of Environmental and Life Sciences, 51-630, Wrocław, Poland
| | - Joanna Kawa-Rygielska
- Department of Fermentation and Cereals Technology, Faculty of Biotechnology and Food Science, Wrocław University of Environmental and Life Sciences, 51-630, Wrocław, Poland
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5
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Farshchi F, Saadati A, Hasanzadeh M, Liu Y, Seidi F. Optimization of a silver-nanoprism conjugated with 3,3',5,5'-tetramethylbenzidine towards easy-to-make colorimetric analysis of acetaldehyde: a new platform towards rapid analysis of carcinogenic agents and environmental technology. RSC Adv 2023; 13:6225-6238. [PMID: 36825283 PMCID: PMC9942108 DOI: 10.1039/d3ra00355h] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Accepted: 02/13/2023] [Indexed: 02/23/2023] Open
Abstract
Acetaldehyde acts as an important mediator in the metabolism of plants and animals; however, its abnormal level can cause problems in biological processes. Although acetaldehyde is found naturally in many organisms, exposure to high concentrations can have effects on the eyes, respiratory system, etc. Due to the importance of detecting acetaldehyde in environmental samples and biofluids, determination of its concentration is highly demanded. There are some reports showing exposure to high concentrations of acetaldehyde for a long time can increase the risk of cancer by reacting with DNA. In this work, we presented a novel colorimetric method for rapid and sensitive detection of acetaldehyde with high reproducibility using different AgNPs with various morphologies. The redox reaction between AgNPs, 3,3',5,5'-tetramethylbenzidine (TMB) solution, and analytes endows a color change in 15 minutes that is detectable by the naked eye. UV spectrophotometry was further used for quantitative analysis. An iron mold with a hexagonal pattern and liquid paraffin were also used to prepare the paper-based microfluidic substrate, as a low cost, accessible, and rapid detection tool. Different types of AgNPs showed different lower limits of quantification (LLOQ). The AgNPs-Cit and AgNPrs could identify acetaldehyde with linear range of 10-7 to 10 M and an LLOQ of 10-7 M. The AgNWs showed the best color change activity with a linear range 10-5 to 10 M and the lowest diagnostic limit is 10-5 M. Finally, analysis of human biofluids as real samples were successfully performed using this system.
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Affiliation(s)
- Fatemeh Farshchi
- Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Laboratório de Biologia Molecular e Doenças Endêmicas Avenida Brasil No 4365 - Manguinhos Rio de Janeiro 21040-900 RJ Brazil
| | - Arezoo Saadati
- Central European Institute of Technology, Brno University of Technology Brno CZ-612 00 Czech Republic
| | - Mohammad Hasanzadeh
- Pharmaceutical Analysis Research Center, Tabriz University of Medical Sciences Tabriz Iran
- Nutrition Research Center, Tabriz University of Medical Sciences Tabriz Iran
| | - Yuqian Liu
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University Nanjing 210037 China
| | - Farzad Seidi
- Jiangsu Co-Innovation Center for Efficient Processing and Utilization of Forest Resources and International Innovation Center for Forest Chemicals and Materials, Nanjing Forestry University Nanjing 210037 China
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6
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Kazemi Z, Jonidi Jafari A, Kermani M, Rezaei Kalantary R. Acetaldehyde vapors removal from the air using a glass substrate coated with MOF nanoparticles under visible light. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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7
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Development of a Rapid and Sensitive Fluorescence Sensing Method for the Detection of Acetaldehyde in Alcoholic Beverages. Foods 2022; 11:foods11213450. [DOI: 10.3390/foods11213450] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/15/2022] [Accepted: 10/27/2022] [Indexed: 11/06/2022] Open
Abstract
Acetaldehyde is regarded as an important flavor compound in alcoholic beverages. With the advantages of rapidity, low cost and high sensitivity, fluorescent probe could be used as a new tool for the detection of acetaldehyde. Here, an effective fluorescence sensing method based on fluorescent probe N1 (FPN1) was established in this study. The function of FPN1 relies on the nucleophile substitution reaction and photoinduced electron transfer (PET), resulting in a fluorescence increase. Remarkably, the pretreatment background removal method (BRM) was successfully applied for removal of the interference of pyruvate and acetal. The linearity range (LR), limit of detection (LOD) and recovery of the fluorescence sensing method with BRM were 0.0053–200 mg/L, 0.0016 mg/L and 94.02–108.12%, respectively, which showed a broader detection range and better performance on sensitivity compared with the traditional quantitation using gas chromatography (GC). Furthermore, successful application of the method in real samples indicated the advantages of low-cost and rapidity for small-scale detection while assuring the accuracy, which provides a new strategy for the detection of acetaldehyde concentration in alcoholic beverages.
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8
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The Influence of Transport and Storage Conditions on Beer Stability—a Systematic Review. FOOD BIOPROCESS TECH 2022. [DOI: 10.1007/s11947-022-02790-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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9
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Wu Z, Wang J, Niu C, Liu C, Zheng F, Li Q. Transcriptomic and metabolomic analysis reveals genes related to stress tolerance in high gravity brewing. World J Microbiol Biotechnol 2022; 38:59. [DOI: 10.1007/s11274-021-03115-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 07/29/2021] [Indexed: 11/29/2022]
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10
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A Novel Approach to Develop Lager Yeast with Higher NADH Availability to Improve the Flavor Stability of Industrial Beer. Foods 2021; 10:foods10123057. [PMID: 34945608 PMCID: PMC8701400 DOI: 10.3390/foods10123057] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 11/08/2021] [Accepted: 11/18/2021] [Indexed: 11/25/2022] Open
Abstract
Flavor stability is important for beer quality and extensive efforts have been undertaken to improve this. In our previous work, we proved a concept whereby metabolic engineering lager yeast with increased cellular nicotinamide adenine dinucleotide hydride (NADH) availability could enhance the flavor stability of beer. However, the method for breeding non-genetically modified strains with higher NADH levels remains unsolved. In the current study, we reported a novel approach to develop such strains based on atmospheric and room temperature plasma (ARTP) mutagenesis coupled with 2,4-dinitrophenol (DNP) selection. As a result, we obtained a serial of strains with higher NADH levels as well as improved flavor stability. For screening an optimal strain with industrial application potential, we examined the other fermentation characteristics of the mutants and ultimately obtained the optimal strain, YDR-63. The overall fermentation performance of the strain YDR-63 in pilot-scale fermentation was similar to that of the parental strain YJ-002, but the acetaldehyde production was decreased by 53.7% and the resistance staling value of beer was improved by 99.8%. The forced beer aging assay further demonstrated that the favor stability was indeed improved as the contents of 5-hydroxymethylfurfural in YDR-63 was less than that in YJ-002 and the sensory notes of staling was weaker in YDR-63. We also employed this novel approach to another industrial strain, M14, and succeeded in improving its flavor stability. All the findings demonstrated the efficiency and versatility of this new approach in developing strains with improved flavor stability for the beer industry.
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11
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Liang B, Liu Y, Zhao Y, Xia T, Chen R, Yang J. Development of bacterial biosensor for sensitive and selective detection of acetaldehyde. Biosens Bioelectron 2021; 193:113566. [PMID: 34416430 DOI: 10.1016/j.bios.2021.113566] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2021] [Revised: 08/10/2021] [Accepted: 08/12/2021] [Indexed: 01/17/2023]
Abstract
Acetaldehyde is a human carcinogen and widely existed in alcoholic beverages and polluted air. In this study, a simple, fast, convenient and sensitive acetaldehyde biosensor was developed based on an acetaldehyde dehydrogenase (AldDH) bacteria surface display system. The whole-cell catalyst facilitated the dehydrogenation of acetaldehyde, while coenzyme NAD+ was reduced and the resultant NADH can be detected spectrometrically at 340 nm. The correct location of AldDH on the bacteria surface was confirmed by the subcellular fraction and immunofluorescence analysis. By comparing the fusion protein expression level and whole-cell activity, the proper display system for anchoring AldDH on the cell surface was obtained. The results of kinetics analysis towards both surface-displayed AldDH and intracellular expressed AldDH demonstrated that the mass-transport resistance was dramatically alleviated by cell-surface display strategy. Under optimal conditions, AldDH-surface display strain with the highest whole-cell activity (3.41 ± 0.3 mU/OD600) was applied to spectrophotometry acetaldehyde detection system. An excellent linear relationship between the increases of absorbance at 340 nm and acetaldehyde concentration over the range from 1 μM to 300 μM was reached. The proposed approach offered adequate sensitivity for the detection of acetaldehyde at 0.33 μM. Most importantly, the developed biosensor showed the narrowest substrate specificity towards acetaldehyde, which has been employed for quick determination of acetaldehyde in real samples with good accuracy. The total detection time was within 20 min. The method reported here provided a simple, rapid, and low-cost strategy for the sensitive and selective measurement of acetaldehyde. Therefore, genetically engineered cells may find broad application in biosensors and biocatalysts.
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Affiliation(s)
- Bo Liang
- Energy-rich Compounds Production by Photosynthetic Carbon Fixation Research Center, Qingdao Agricultural University, Qingdao, China; Shandong Key Lab of Applied Mycology, College of Life Sciences, Qingdao Agricultural University, Qingdao, China.
| | - Yunhui Liu
- Energy-rich Compounds Production by Photosynthetic Carbon Fixation Research Center, Qingdao Agricultural University, Qingdao, China; Shandong Key Lab of Applied Mycology, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Yukun Zhao
- Pony Testing International Group, Qingdao, China
| | - Tianyu Xia
- Energy-rich Compounds Production by Photosynthetic Carbon Fixation Research Center, Qingdao Agricultural University, Qingdao, China; Shandong Key Lab of Applied Mycology, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Ruofei Chen
- Energy-rich Compounds Production by Photosynthetic Carbon Fixation Research Center, Qingdao Agricultural University, Qingdao, China; Shandong Key Lab of Applied Mycology, College of Life Sciences, Qingdao Agricultural University, Qingdao, China
| | - Jianming Yang
- Energy-rich Compounds Production by Photosynthetic Carbon Fixation Research Center, Qingdao Agricultural University, Qingdao, China; Shandong Key Lab of Applied Mycology, College of Life Sciences, Qingdao Agricultural University, Qingdao, China.
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Li J, Yao SL, Liu SJ, Chen YQ. Fluorescent sensors for aldehydes based on luminescent metal-organic frameworks. Dalton Trans 2021; 50:7166-7175. [PMID: 33978009 DOI: 10.1039/d1dt00890k] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Volatile aldehydes cause great harm to human health and the living environment, and the detection of aldehydes has attracted much attention from chemists and material scientists. In recent years, as one of the most promising classes of functional materials, luminescent metal-organic frameworks (LMOFs) have bloomed as fluorescent sensors for the detection of aldehydes. Herein, the sensing properties of LMOF sensors toward formaldehyde, benzaldehyde, acetaldehyde and other aldehydes have been reviewed, and the sensing mechanism and applications are also illustrated. Additionally, the current status and its potential development prospects in this field are outlined.
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Affiliation(s)
- Jing Li
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China.
| | - Shu-Li Yao
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China.
| | - Sui-Jun Liu
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China.
| | - Yong-Qiang Chen
- School of Chemistry and Chemical Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, Jiangxi Province, P.R. China. and Department of Chemistry and Chemical Engineering, Jinzhong University, Jinzhong 030619, Shanxi Province, P.R. China.
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13
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Yeast Fermentation at Low Temperatures: Adaptation to Changing Environmental Conditions and Formation of Volatile Compounds. Molecules 2021; 26:molecules26041035. [PMID: 33669237 PMCID: PMC7919833 DOI: 10.3390/molecules26041035] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 02/10/2021] [Accepted: 02/12/2021] [Indexed: 12/12/2022] Open
Abstract
Yeast plays a key role in the production of fermented foods and beverages, such as bread, wine, and other alcoholic beverages. They are able to produce and release from the fermentation environment large numbers of volatile organic compounds (VOCs). This is the reason for the great interest in the possibility of adapting these microorganisms to fermentation at reduced temperatures. By doing this, it would be possible to obtain better sensory profiles of the final products. It can reduce the addition of artificial flavors and enhancements to food products and influence other important factors of fermented food production. Here, we reviewed the genetic and physiological mechanisms by which yeasts adapt to low temperatures. Next, we discussed the importance of VOCs for the food industry, their biosynthesis, and the most common volatiles in fermented foods and described the beneficial impact of decreased temperature as a factor that contributes to improving the composition of the sensory profiles of fermented foods.
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14
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Wang M, Xie Y, Zhao S, Wang Y, Cui J, Chang S. Association of alcohol consumption with prognosis of ischemic stroke by subtype in different follow-up periods: a hospital-based study in China. Postgrad Med 2020; 133:154-159. [PMID: 33522353 DOI: 10.1080/00325481.2020.1805945] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
OBJECTIVES Alcohol consumption is a risk factor for stroke. However, there are no available data on the effect of alcohol consumption on the long-term outcome of ischemic stroke in China. Therefore, this study aimed to explore the association of alcohol consumption with the prognosis of ischemic stroke by subtype in different follow-up periods after stroke. METHODS This 12-month follow-up study recruited 3830 acute ischemic stroke patients from Tianjin, China, between 2016 and 2018. Patients were categorized into two groups according to their consumption of alcohol. Differences in mortality, recurrence, and dependency rates at 3 and 12 months after stroke were compared between both groups. RESULTS The mortality, recurrence, and dependency rates at 12 months after stroke were significantly higher in patients who previously consumed alcohol than in those without previous alcohol consumption (all P < 0.005). A similar trend was observed for mortality rate at 3 months after stroke (P < 0.001). The risk of death at 3 months after an atherothrombotic stroke decreased by 63.4% (relative risk [RR], 0.366; 95% confidence interval [CI], 0.144-0.935) among patients who previously consumed alcohol compared with those who never consumed alcohol. Moreover, for patients with small artery disease classified according to the Trial of ORG 10,172 in Acute Stroke Treatment (TOAST), the recurrence and dependency rates at 12 months after stroke decreased by 49.2% (RR, 0.508; 95% CI, 0.259-0.996) and 49.5% (RR, 0.505; 95% CI, 0.258-0.990), respectively, among patients who consumed alcohol. CONCLUSIONS Previous alcohol consumption decreased the risk of death at 3 months after stroke among patients with atherothrombotic stroke according to the TOAST classification. Furthermore, for patients with small artery disease (according to TOAST classification), alcohol consumption significantly decreased the risk of recurrence and dependency at 12 months after stroke. This study highlights an urgent need to quantify the association of alcohol consumption with outcomes after stroke in China to improve stroke prognosis.
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Affiliation(s)
- Min Wang
- Department of Neurology, Dongying People's Hospital, Dongying, Shandong Province, China
| | - Yuanli Xie
- Department of Neurology, Dongying People's Hospital, Dongying, Shandong Province, China
| | - Suzhen Zhao
- Department of Oncology, Dongying People's Hospital, Dongying, Shandong Province, China
| | - Yucui Wang
- Department of Neurology, Dongying People's Hospital, Dongying, Shandong Province, China
| | - Jingjing Cui
- Department of Neurology, Dongying People's Hospital, Dongying, Shandong Province, China
| | - Shihui Chang
- Department of Neurology, Dongying People's Hospital, Dongying, Shandong Province, China
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15
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Xu X, Song Y, Guo L, Cheng W, Niu C, Wang J, Liu C, Zheng F, Zhou Y, Li X, Mu Y, Li Q. Higher NADH Availability of Lager Yeast Increases the Flavor Stability of Beer. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2020; 68:584-590. [PMID: 31623437 DOI: 10.1021/acs.jafc.9b05812] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
Flavor stability is a significant concern to brewers as the staling compounds impart unpleasant flavor to beer. Thus, yeasts with antistaling ability have been engineered to produce beer with improved flavor stability. Here, we proposed that increasing the NADH availability of yeast could improve the flavor stability of beer. By engineering endogenous pathways, we obtained an array of yeast strains with a higher reducing activity. Then, we carried out beer fermentation with these strains and found that the antistaling capacities of the beer samples were improved. For a better understanding of the underlying mechanism, we compared the flavor profiles of these strains. The production of staling components was significantly decreased, whereas the content of antistaling components, such as SO2, was increased, in line with the increased antistaling ability. The other aroma components were marginally changed, indicating that this concept was useful for improving the antistaling stability without changing the flavor of beer.
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Affiliation(s)
| | - Yumei Song
- Beijing Yanjing Brewery Group Co., Ltd. , Beijing 101300 , China
| | - Liyun Guo
- Beijing Yanjing Brewery Group Co., Ltd. , Beijing 101300 , China
| | | | | | | | | | | | | | | | - Yingjian Mu
- Beijing Yanjing Brewery Group Co., Ltd. , Beijing 101300 , China
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Hernandes KC, Souza-Silva ÉA, Assumpção CF, Zini CA, Welke JE. Validation of an analytical method using HS-SPME-GC/MS-SIM to assess the exposure risk to carbonyl compounds and furan derivatives through beer consumption. Food Addit Contam Part A Chem Anal Control Expo Risk Assess 2019; 36:1808-1821. [PMID: 31596176 DOI: 10.1080/19440049.2019.1672897] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Compounds with toxic potential may occur in beer, such as carbonyl compounds (acetaldehyde, acrolein, ethyl carbamate [EC] and formaldehyde) and furan derivatives [furfural and furfuryl alcohol (FA)]. The objective of this study was, for the first time, to validate a method based on headspace-solid phase microextraction using a PDMS-overcoated fibre and gas chromatography with mass spectrometric detection in selected ion monitoring mode (HS-SPME-GC/MS-SIM) to investigate target carbonyl compounds and furan derivatives in beers. Analytical curves showed proper linearity with r2 ranging from 0.9731 to 0.9960 for acetaldehyde and EC, respectively. The lowest LOD was found for acetaldehyde (0.03 µg L-1), while the lowest LOQ value (1.0 µg L-1) was found for acetaldehyde and EC, formaldehyde and furfural. Recovery (90% to 105%), intermediate precision and repeatability (lower than 13%), limits of detection and quantification (values below 2.5 μg L-1) showed that the method is suitable to simultaneously quantify these compounds. EC was detected in only two samples (1 lager and 1 ale). Furfural was found in 37% and 82% of ale and lager beers, respectively. Acetaldehyde, acrolein, formaldehyde and FA were detected in all samples. However, acrolein was the only compound found in the commercial samples at a concentration capable of causing health risk. Besides furfural and FA, four other furan-containing compounds (5-methyl-2-furan methanethiol, acetylfuran, 5-methylfurfural and γ-nonalactone) were also found in beers, however, at levels low enough not to impose potential health risk.
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Affiliation(s)
- Karolina C Hernandes
- Instituto de Ciência e Tecnologia de Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | - Érica A Souza-Silva
- Instituto de Química, UFRGS, Porto Alegre, Brazil.,Departamento de Química, Instituto de Ciências Ambientais, Químicas e Farmacêuticas, Universidade Federal de São Paulo (UNIFESP), Diadema, Brazil
| | - Carolina F Assumpção
- Instituto de Ciência e Tecnologia de Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
| | | | - Juliane E Welke
- Instituto de Ciência e Tecnologia de Alimentos (ICTA), Universidade Federal do Rio Grande do Sul (UFRGS), Porto Alegre, Brazil
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17
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Yin H, Liu LP, Yang M, Ding XT, Jia SR, Dong JJ, Zhong C. Enhancing Medium-Chain Fatty Acid Ethyl Ester Production During Beer Fermentation Through EEB1 and ETR1 Overexpression in Saccharomyces pastorianus. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:5607-5613. [PMID: 30931561 DOI: 10.1021/acs.jafc.9b00128] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Esters are important flavor compounds in alcoholic beverages. Although they are present at trace levels, esters play a key role in the formation of flavors, especially fruity flavors, in beverages. Low ester contents result in bland beer and unpleasant flavor. In this study, three recombinant strains, ethanol O-acyltransferase encoding EEB1 overexpression strain (31194:: EEB1), 2-enoyl thioester reductase encoding ETR1 overexpression strain (31194:: ETR1), and EEB1- ETR1 co-overexpression strain (31194:: EEB1:: ETR1), were constructed. Ethyl hexanoate production by 31194:: EEB1 and 31194:: EEB1:: ETR1 was 106% higher than that by the parental strain. Further, ethyl octanoate production by 31194:: EEB1 and 31194:: EEB1:: ETR1 was enhanced by 47 and 41%, respectively, compared with that of parental strain 31194. However, no difference was observed between 31194:: ETR1 and the parental strain in terms of ethyl hexanoate and ethyl octanoate production. This indicates that although EEB1 overexpression in Saccharomyces pastorianus enhanced ethyl hexanoate and ethyl octanoate production, ETR1 expression levels did not affect the extracellular concentrations of these esters.
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Affiliation(s)
- Hua Yin
- State Key Laboratory of Biological Fermentation Engineering of Beer, R&D Center , Tsingtao Brewery Company Ltd. , Qingdao 266101 , Shandong , PR China
| | - Ling-Pu Liu
- State Key Laboratory of Food Nutrition and Safety , Tianjin University of Science & Technology , Tianjin 300457 , PR China
- Key Laboratory of Industrial Fermentation Microbiology (Ministry of Education) , Tianjin University of Science & Technology , Tianjin 300457 , PR China
| | - Mei Yang
- State Key Laboratory of Biological Fermentation Engineering of Beer, R&D Center , Tsingtao Brewery Company Ltd. , Qingdao 266101 , Shandong , PR China
| | - Xiao-Tong Ding
- State Key Laboratory of Food Nutrition and Safety , Tianjin University of Science & Technology , Tianjin 300457 , PR China
- Key Laboratory of Industrial Fermentation Microbiology (Ministry of Education) , Tianjin University of Science & Technology , Tianjin 300457 , PR China
| | - Shi-Ru Jia
- State Key Laboratory of Food Nutrition and Safety , Tianjin University of Science & Technology , Tianjin 300457 , PR China
- Key Laboratory of Industrial Fermentation Microbiology (Ministry of Education) , Tianjin University of Science & Technology , Tianjin 300457 , PR China
| | - Jian-Jun Dong
- State Key Laboratory of Biological Fermentation Engineering of Beer, R&D Center , Tsingtao Brewery Company Ltd. , Qingdao 266101 , Shandong , PR China
- State Key Laboratory of Food Nutrition and Safety , Tianjin University of Science & Technology , Tianjin 300457 , PR China
| | - Cheng Zhong
- State Key Laboratory of Food Nutrition and Safety , Tianjin University of Science & Technology , Tianjin 300457 , PR China
- Key Laboratory of Industrial Fermentation Microbiology (Ministry of Education) , Tianjin University of Science & Technology , Tianjin 300457 , PR China
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18
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Humia BV, Santos KS, Barbosa AM, Sawata M, Mendonça MDC, Padilha FF. Beer Molecules and Its Sensory and Biological Properties: A Review. Molecules 2019; 24:molecules24081568. [PMID: 31009997 PMCID: PMC6515478 DOI: 10.3390/molecules24081568] [Citation(s) in RCA: 76] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Revised: 04/17/2019] [Accepted: 04/19/2019] [Indexed: 11/25/2022] Open
Abstract
The production and consumption of beer plays a significant role in the social, political, and economic activities of many societies. During brewing fermentation step, many volatile and phenolic compounds are produced. They bring several organoleptic characteristics to beer and also provide an identity for regional producers. In this review, the beer compounds synthesis, and their role in the chemical and sensory properties of craft beers, and potential health benefits are described. This review also describes the importance of fermentation for the brewing process, since alcohol and many volatile esters are produced and metabolized in this step, thus requiring strict control. Phenolic compounds are also present in beer and are important for human health since it was proved that many of them have antitumor and antioxidant activities, which provides valuable data for moderate dietary beer inclusion studies.
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Affiliation(s)
- Bruno Vieira Humia
- Biomaterials Laboratory (LBMat), Institute of Technology and Research (ITP), Av. Murilo Dantas, 300, Aracaju 49032-490, Sergipe, Brazil.
- Tiradentes University (UNIT), Av. Murilo Dantas, 300, Aracaju 49032-490, Sergipe, Brazil.
| | - Klebson Silva Santos
- Center for Study on Colloidal Systems (NUESC)/Institute of Technology and Research (ITP), Av. Murilo Dantas, 300, Aracaju 49032-490, Sergipe, Brazil.
| | - Andriele Mendonça Barbosa
- Biomaterials Laboratory (LBMat), Institute of Technology and Research (ITP), Av. Murilo Dantas, 300, Aracaju 49032-490, Sergipe, Brazil.
- Tiradentes University (UNIT), Av. Murilo Dantas, 300, Aracaju 49032-490, Sergipe, Brazil.
| | - Monize Sawata
- Biomaterials Laboratory (LBMat), Institute of Technology and Research (ITP), Av. Murilo Dantas, 300, Aracaju 49032-490, Sergipe, Brazil.
- Tiradentes University (UNIT), Av. Murilo Dantas, 300, Aracaju 49032-490, Sergipe, Brazil.
| | - Marcelo da Costa Mendonça
- Biomaterials Laboratory (LBMat), Institute of Technology and Research (ITP), Av. Murilo Dantas, 300, Aracaju 49032-490, Sergipe, Brazil.
- Tiradentes University (UNIT), Av. Murilo Dantas, 300, Aracaju 49032-490, Sergipe, Brazil.
- Empresa Brasileira de Pesquisa Agropecuária (EMBRAPA), Avenida Beira-mar, 3.250, Aracaju 49025-040, Sergipe, Brazil.
| | - Francine Ferreira Padilha
- Biomaterials Laboratory (LBMat), Institute of Technology and Research (ITP), Av. Murilo Dantas, 300, Aracaju 49032-490, Sergipe, Brazil.
- Tiradentes University (UNIT), Av. Murilo Dantas, 300, Aracaju 49032-490, Sergipe, Brazil.
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19
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Effect of Co-Inoculation with Saccharomyces cerevisiae and Lactic Acid Bacteria on the Content of Propan-2-ol, Acetaldehyde and Weak Acids in Fermented Distillery Mashes. Int J Mol Sci 2019; 20:ijms20071659. [PMID: 30987119 PMCID: PMC6479555 DOI: 10.3390/ijms20071659] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2019] [Revised: 03/30/2019] [Accepted: 04/02/2019] [Indexed: 11/17/2022] Open
Abstract
The qualitative and quantitative composition of volatile compounds in fermented distillery mash determines the quality of the obtained distillate of agricultural origin (i.e., raw spirit) and the effectiveness of further purification steps. Propan-2-ol (syn. isopropyl alcohol), due to its low boiling point, is difficult to remove by rectification. Therefore, its synthesis needs to be limited during fermentation by Saccharomyces cerevisiae yeast, while at the same time controlling the levels of acetaldehyde and acetic acid, which are likewise known to determine the quality of raw spirit. Lactic acid bacteria (LAB) are a common but undesirable contaminant in distillery mashes. They are responsible for the production of undesirable compounds, which can affect synthesis of propan-2-ol. Some bacteria strains are able to synthesize isopropyl alcohol. This study therefore set out to investigate whether LAB with S. cerevisiae yeast are responsible for conversion of acetone to propan-2-ol, as well as the effects of the amount of LAB inoculum and fermentation parameters (pH and temperature) on the content of isopropyl alcohol, acetaldehyde, lactic acid and acetic acid in fermented mashes. The results of NMR and comprehensive two-dimensional gas chromatography coupled with time of flight mass spectrometry (GC × GC-TOF MS) analysis confirmed the ability of the yeast and LAB strains to metabolize acetone via its reduction to isopropyl alcohol. Efficient fermentation of distillery mashes was observed in all tested mashes with an initial LAB count of 3.34–6.34 log cfu/mL, which had no significant effect on the ethanol content. However, changes were observed in the contents of by-products. Lowering the initial pH of the mashes to 4.5, without and with LAB (3.34–4.34 log cfu/mL), resulted in a decrease in propan-2-ol and a concomitant increase in acetaldehyde content, while a higher pH (5.0 and 5.5) increased the content of propan-2-ol and decreased acetaldehyde content. Higher temperature (35 °C) promoted propan-2-ol synthesis and also resulted in increased acetic acid content in the fermented mashes compared to the controls. Moreover, the acetic acid content rose with increases in the initial pH and the initial LAB count.
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20
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Lehnhardt F, Gastl M, Becker T. Forced into aging: Analytical prediction of the flavor-stability of lager beer. A review. Crit Rev Food Sci Nutr 2018; 59:2642-2653. [PMID: 29641218 DOI: 10.1080/10408398.2018.1462761] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Despite years of research, sensory deterioration during beer aging remains a challenge to brewing chemists. Therefore, sensorial and analytical tools to investigate aging flavors are required. This review aims to summarize the available analytical methods and to highlight the problems associated with addressing the flavor-stability of beer. Carbonyls are the major contributors to the aroma of aged pale lager beer, which is especially susceptible to deterioration. They are formed via known pathways during storage, but, as recent research indicates, are mainly released from the bound-state during aging. However, most published studies are based on model systems, and thus the formation and breakdown parameters of these adducts are poorly understood. This concept has not been previously considered in previous forced-aging analysis. Only weak parallels can be drawn between forced and natural aging. This is likely due to the different activation energies of the chemical processes responsible for aging, but may also be due to heat-promoted release of bound aldehydes. Thus, precursors and their binding parameters must be investigated to make appropriate technological adjustments to forced-aging experiments. In combination with sophisticated data analysis, the investigation of volatile indicators and non-volatile precursors can lead to more reliable predictions of flavor stability.
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Affiliation(s)
- Florian Lehnhardt
- Chair of Brewing and Beverage Technology, Technische Universität München , Weihenstephaner Steig 20, Freising , Germany
| | - Martina Gastl
- Chair of Brewing and Beverage Technology, Technische Universität München , Weihenstephaner Steig 20, Freising , Germany
| | - Thomas Becker
- Chair of Brewing and Beverage Technology, Technische Universität München , Weihenstephaner Steig 20, Freising , Germany
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