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Ribeiro da Silva Lima L, Barros Santos MC, P. Gomes PW, Fernández-Ochoa Á, Simões Larraz Ferreira M. Overview of the Metabolite Composition and Antioxidant Capacity of Seven Major and Minor Cereal Crops and Their Milling Fractions. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2024; 72:19197-19218. [PMID: 38803291 PMCID: PMC11363145 DOI: 10.1021/acs.jafc.4c01312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 05/20/2024] [Accepted: 05/21/2024] [Indexed: 05/29/2024]
Abstract
Cereal grains play an important role in human health as a source of macro- and micronutrients, besides phytochemicals. The metabolite diversity was investigated in cereal crops and their milling fractions by untargeted metabolomics ultra-high-performance liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) of 69 samples: 7 species (barley, oat, pearl millet, rye, sorghum, triticale, and wheat), 23 genotypes, and 4 milling fractions (husk, bran, flour, and wholegrain). Samples were also analyzed by in vitro antioxidant activity. UHPLC-MS/MS signals were processed using XCMS, and metabolite annotation was based on SIRIUS and GNPS libraries. Bran and husk showed the highest antioxidant capacity and phenolic content/diversity. The major metabolite classes were phenolic acids, flavonoids, fatty acyls, and organic acids. Sorghum, millet, barley, and oats showed distinct metabolite profiles, especially related to the bran fraction. Molecular networking and chemometrics provided a comprehensive insight into the metabolic profiling of cereal crops, unveiling the potential of coproducts and super cereals such as sorghum and millet as sources of polyphenols.
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Affiliation(s)
- Luciana Ribeiro da Silva Lima
- Laboratory
of Bioactives, Food and Nutrition Graduate Program (PPGAN), Federal University of the State of Rio de Janeiro
(UNIRIO), Rio de Janeiro 22290-240, Brazil
- Center
of Innovation in Mass Spectrometry, Laboratory of Protein Biochemistry, UNIRIO, Rio de
Janeiro 22290-240, Brazil
| | - Millena C. Barros Santos
- Bordeaux
Metabolome-MetaboHUB, INRAE Bordeaux Nouvelle-Aquitaine,
UMR1332 BFP, Villenave
d’Ornon 33882, France
| | - Paulo Wender P. Gomes
- Collaborative
Mass Spectrometry Innovation Center, Skaggs School of Pharmacy &
Pharmaceutical Sciences, University of California
San Diego, 9500 Gilman
Drive, La Jolla, San Diego, California 92093-0751, United States
| | - Álvaro Fernández-Ochoa
- Department
of Analytical Chemistry, Faculty of Sciences, University of Granada, Granada 18071, Spain
| | - Mariana Simões Larraz Ferreira
- Laboratory
of Bioactives, Food and Nutrition Graduate Program (PPGAN), Federal University of the State of Rio de Janeiro
(UNIRIO), Rio de Janeiro 22290-240, Brazil
- Center
of Innovation in Mass Spectrometry, Laboratory of Protein Biochemistry, UNIRIO, Rio de
Janeiro 22290-240, Brazil
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Jiménez-Pulido IJ, Martín-Diana AB, Tomé-Sánchez I, de Luis D, Martínez-Villaluenga C, Rico D. Boosting Synergistic Antioxidant and Anti-Inflammatory Properties Blending Cereal-Based Nutraceuticals Produced Using Sprouting and Hydrolysis Tools. Foods 2024; 13:1868. [PMID: 38928809 PMCID: PMC11203053 DOI: 10.3390/foods13121868] [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: 05/10/2024] [Revised: 06/09/2024] [Accepted: 06/11/2024] [Indexed: 06/28/2024] Open
Abstract
Nutraceuticals obtained from sprouted wheat and oat grains and processing by-products (bran and hull, respectively) naturally containing antioxidant and anti-inflammatory compounds were evaluated. The objective of this study was the development of a cereal-based nutraceutical formula combining extracts from sprouts and by-products and the exploration for potential synergetic effects in their bioactive properties. The antioxidant and anti-inflammatory capacities, glycemic index, phytic acid, and β-glucan of individual wheat bran hydrolysate (EH-WB), sprouted wheat (SW), oat hull hydrolysate (EH-OH), sprouted oat (SO), and combined ingredients (CI 1, CI 2, and CI3) were used to tailor an optimal nutraceutical formula. The three blend ingredients (CI 1, CI2, and CI3) were formulated at different ratios (EH-WB:SW:EH-OH:SO; 1:1:1:1, 2:1:2:1, and 1:2:1:2, w:w:w:w, respectively). The resulting mixtures showed total phenol (TPs) content ranging from 412.93 to 2556.66 µmol GAE 100 g-1 and antioxidant capacity values from 808.14 to 22,152.54 µmol TE 100 g-1 (ORAC) and 1914.05 to 7261.32 µmol TE 100 g-1 (ABTS•+), with Fe3+ reducing ability from 734. 02 to 8674.51 mmol reduced Fe 100 g-1 (FRAP) for the individual ingredients produced from EH-WB and EH-OH, where high antioxidant activity was observed. However, the anti-inflammatory results exhibited an interesting behavior, with a potentially synergistic effect of the individual ingredients. This effect was observed in CI2 and CI3, resulting in a higher ability to inhibit IL-6 and TNF-α than expected based on the anti-inflammatory values of their individual ingredients. Similar to the antioxidant properties, oat-based ingredients significantly contributed more to the anti-inflammatory properties of the overall mixture. This contribution is likely associated with the β-glucans and avenanthramides present in oats. To ensure the bioaccessibility of these ingredients, further studies including simulated digestion protocols would be necessary. The ingredient formulated with a 2:1 hydrolysate-to-sprout ratio was the most effective combination, reaching higher biological characteristics.
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Affiliation(s)
- Iván Jesús Jiménez-Pulido
- Agrarian Technological Institute of Castilla and Leon (ITACyL), Ctra. Burgos Km 119, Finca Zamadueñas, 47071 Valladolid, Spain; (I.J.J.-P.); (A.B.M.-D.)
| | - Ana Belén Martín-Diana
- Agrarian Technological Institute of Castilla and Leon (ITACyL), Ctra. Burgos Km 119, Finca Zamadueñas, 47071 Valladolid, Spain; (I.J.J.-P.); (A.B.M.-D.)
| | - Irene Tomé-Sánchez
- Department of Technological Processes and Biotechnology (DPTB), Institute of Food Science, Technology and Nutrition (ICTAN), Spanish National Research Council (CSIC), 28040 Madrid, Spain; (I.T.-S.); (C.M.-V.)
| | - Daniel de Luis
- Endocrinology and Clinical Nutrition Research Center (IENVA), Faculty of Medicine, University of Valladolid, Av. Ramón y Cajal, 3, 47003 Valladolid, Spain;
| | - Cristina Martínez-Villaluenga
- Department of Technological Processes and Biotechnology (DPTB), Institute of Food Science, Technology and Nutrition (ICTAN), Spanish National Research Council (CSIC), 28040 Madrid, Spain; (I.T.-S.); (C.M.-V.)
| | - Daniel Rico
- Endocrinology and Clinical Nutrition Research Center (IENVA), Faculty of Medicine, University of Valladolid, Av. Ramón y Cajal, 3, 47003 Valladolid, Spain;
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Figueroa-Pérez MG, Reynoso-Camacho R, Ramos-Gómez M, Mendoza-Sánchez M, Pérez-Ramírez IF. Impact of temperature and humidity conditions as abiotic stressors on the phytochemical fingerprint of oat (Avena sativa L.) sprouts. Food Chem 2024; 439:138173. [PMID: 38100868 DOI: 10.1016/j.foodchem.2023.138173] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 11/13/2023] [Accepted: 12/06/2023] [Indexed: 12/17/2023]
Abstract
This study aimed to evaluate the effect of temperature (20, 25, and 30 °C) and relative humidity (RH, 50, 55, and 60 %) as abiotic stressors during oat (Avena sativa L.) germination using a 2-level factorial design with central point. UPLC-QToF-MSE identified eighty polyphenols, nine avenanthramides, twelve lignans, and five phytosterols Notably, 100 % germination was achieved at 25 °C/60 % RH from day 3, yielding the longest radicle size. The highest content of most phenolic acids, avenanthramides, and lignans occurred at 30 °C/65 % RH, where 100 % germination was attained by day 5, but with a shorter radicle size. The best flavonoid and phytosterol profle was obtained at 20 °C/55 % RH, achieving only a 67 % germination rate. Therefore, while these conditions enhance the bioactive compound profile, the associate decrease in germination metrics suggests potential distress effects. Consideration of both photochemical outcomes and germination yield is crucial for comprehensive assessments in future applications.
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Affiliation(s)
| | | | - Minerva Ramos-Gómez
- Facultad de Química, Universidad Autónoma de Querétaro, Querétaro 76010, Querétaro, Mexico
| | - Magdalena Mendoza-Sánchez
- Facultad de Química, Universidad Autónoma de Querétaro, Querétaro 76010, Querétaro, Mexico; Facultad de Ingeniería, Universidad Autónoma de Querétaro, Querétaro 76010, Querétaro, Mexico.
| | - Iza F Pérez-Ramírez
- Facultad de Química, Universidad Autónoma de Querétaro, Querétaro 76010, Querétaro, Mexico.
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Jágr M, Hofinger-Horvath A, Ergang P, Čepková PH, Schönlechner R, Pichler EC, D Amico S, Grausgruber H, Vagnerová K, Dvořáček V. Comprehensive study of the effect of oat grain germination on the content of avenanthramides. Food Chem 2024; 437:137807. [PMID: 37871428 DOI: 10.1016/j.foodchem.2023.137807] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/20/2023] [Accepted: 10/17/2023] [Indexed: 10/25/2023]
Abstract
The chemical profile and the levels of AVNs in oat varieties after germination have been examinated. In the present study, 12 distinct oat varieties were germinated for 0-192 h and a total of 28 AVNs and 3 AVN-hexosides were determined in these samples. Among them, three novel AVNs were synthesized (AVN 1a, AVN 2a, and AVN 2ad), characterized using NMR techniques (1D- and 2D-NMR), and assessed in real samples for the first time. The most abundant AVNs in the samples were AVN 2c, AVN 2p, AVN 2f, and their long-chained analogues AVN 2 cd, AVN 2pd, AVN 2fd, together representing 75-85 % of the total AVNs content. The highest total AVN level was observed on average after 48-72 h of germination time and it reached a value 1-1.2 mg/g. Out of 12 investigated oat varieties, CDC Boyer, Diadem, and Rozmar have proved to be the most suitable genotypes for germination.
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Affiliation(s)
- Michal Jágr
- Quality of Plant Products, Crop Research Institute, Drnovská 507/73, 161 06 Prague 6 - Ruzyně, Czech Republic.
| | - Andreas Hofinger-Horvath
- Department of Chemistry, Division of Organic Chemistry, University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Vienna, Austria
| | - Peter Ergang
- Institute of Physiology, Czech Academic of Sciences, Vídeňská 1084, 142 00 Prague 4, Czech Republic
| | - Petra Hlásná Čepková
- Gene Bank, Crop Research Institute, Drnovská 507/73, 161 06 Prague 6 - Ruzyně, Czech Republic
| | - Regine Schönlechner
- Institute of Food Technology, BOKU - University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Vienna, Austria
| | - Eleonora Charlotte Pichler
- Institute of Food Technology, BOKU - University of Natural Resources and Life Sciences, Vienna, Muthgasse 18, 1190 Vienna, Austria
| | - Stefano D Amico
- Institute for Animal Nutrition and Feed, AGES - Austrian Agency for Health and Food Safety GmbH, Spargelfeldstr. 192, 1220 Vienna, Austria
| | - Heinrich Grausgruber
- Institute of Plant Breeding, BOKU - University of Natural Resources and Life Sciences, Vienna, Konrad-Lorenz-Str. 24, 3430 Tulln an der Donau, Austria
| | - Karla Vagnerová
- Institute of Physiology, Czech Academic of Sciences, Vídeňská 1084, 142 00 Prague 4, Czech Republic
| | - Václav Dvořáček
- Quality of Plant Products, Crop Research Institute, Drnovská 507/73, 161 06 Prague 6 - Ruzyně, Czech Republic
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5
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Jiménez-Pulido IJ, Rico D, De Luis D, Martín-Diana AB. Combined Strategy Using High Hydrostatic Pressure, Temperature and Enzymatic Hydrolysis for Development of Fibre-Rich Ingredients from Oat and Wheat By-Products. Foods 2024; 13:378. [PMID: 38338514 PMCID: PMC10855855 DOI: 10.3390/foods13030378] [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: 12/28/2023] [Revised: 01/18/2024] [Accepted: 01/22/2024] [Indexed: 02/12/2024] Open
Abstract
Wheat bran (WB) and oat hull (OH) are two interesting undervalued cereal processing sources rich in total dietary fibre (TDF) and other associated bioactive compounds, such as β-glucans and polyphenols. The aim of this study was to optimise a combination chemical (enzymes) and physical (high hydrostatic pressure-temperature) strategies to increase the bioaccessibility of bioactive compounds naturally bound to the bran and hull outer layers. WB and OH were hydrolysed using food-grade enzymes (UltraFloXL and Viscoferm, for WB and OH, respectively) in combination with HPP at different temperatures (40, 50, 60 and 70 °C) and hydrolysis either before or after HPP. Proximal composition, phytic acid, β-glucans, total phenolics (TPs) and total antioxidant activity (TAC) were evaluated to select the processing conditions for optimal nutritional and bioactive properties of the final ingredients. The application of the hydrolysis step after the HPP treatment resulted in lower phytic acid levels in both matrices (WB and OH). On the other hand, the release of β-glucan was more effective at the highest temperature (70 °C) used during pressurisation. After the treatment, the TP content ranged from 756.47 to 1395.27 µmol GAE 100 g-1 in WB, and OH showed values from 566.91 to 930.45 µmol GAE 100 g-1. An interaction effect between the temperature and hydrolysis timing (applied before or after HPP) was observed in the case of OH. Hydrolysis applied before HPP was more efficient in releasing OH TPs at lower HPP temperatures (40-50 °C); meanwhile, at higher HPP temperatures (60-70 °C), hydrolysis yielded higher TP values when applied after HPP. This effect was not observed in WB, where the hydrolysis was more effective before HPP. The TP results were significantly correlated with the TAC values. The results showed that the application of optimal process conditions (hydrolysis before HPP at 60 or 70 °C for WB; hydrolysis after HPP at 70 °C for OH) can increase the biological value of the final ingredients obtained.
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Affiliation(s)
- Iván Jesús Jiménez-Pulido
- Agrarian Technological Institute of Castilla and Leon (ITACyL), Ctra. Burgos Km 119, Finca Zamadueñas, 47071 Valladolid, Spain; (I.J.J.-P.); (A.B.M.-D.)
| | - Daniel Rico
- Agrarian Technological Institute of Castilla and Leon (ITACyL), Ctra. Burgos Km 119, Finca Zamadueñas, 47071 Valladolid, Spain; (I.J.J.-P.); (A.B.M.-D.)
| | - Daniel De Luis
- Endocrinology and Nutrition Research Centre, Medicine School, Service of Endocrinology and Nutrition, Universitary Clinic Hospital of Valladolid, University of Valladolid, Av. Ramón y Cajal, 3, 47003 Valladolid, Spain;
| | - Ana Belén Martín-Diana
- Agrarian Technological Institute of Castilla and Leon (ITACyL), Ctra. Burgos Km 119, Finca Zamadueñas, 47071 Valladolid, Spain; (I.J.J.-P.); (A.B.M.-D.)
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Waliat S, Arshad MS, Hanif H, Ejaz A, Khalid W, Kauser S, Al-Farga A. A review on bioactive compounds in sprouts: extraction techniques, food application and health functionality. INTERNATIONAL JOURNAL OF FOOD PROPERTIES 2023. [DOI: 10.1080/10942912.2023.2176001] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/12/2023]
Affiliation(s)
- Sadaf Waliat
- Department of Food Science, Government College University, Faisalabad, Pakistan
| | | | - Hadia Hanif
- Department of Food Science, Government College University, Faisalabad, Pakistan
| | - Afaf Ejaz
- Department of Food Science, Government College University, Faisalabad, Pakistan
| | - Waseem Khalid
- Department of Food Science, Government College University, Faisalabad, Pakistan
| | - Safura Kauser
- Department of Food Science, Government College University, Faisalabad, Pakistan
| | - Ammar Al-Farga
- Department of Food Science, Faculty of Agriculture, Ibb University, Ibb, Yemen
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Borgonovi SM, Chiarello E, Pasini F, Picone G, Marzocchi S, Capozzi F, Bordoni A, Barbiroli A, Marti A, Iametti S, Di Nunzio M. Effect of Sprouting on Biomolecular and Antioxidant Features of Common Buckwheat ( Fagopyrum esculentum). Foods 2023; 12:foods12102047. [PMID: 37238865 DOI: 10.3390/foods12102047] [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: 04/23/2023] [Revised: 05/14/2023] [Accepted: 05/16/2023] [Indexed: 05/28/2023] Open
Abstract
Buckwheat is a pseudo-cereal widely grown and consumed throughout the world. Buckwheat is recognized as a good source of nutrients and, in combination with other health-promoting components, is receiving increasing attention as a potential functional food. Despite the high nutritional value of buckwheat, a variety of anti-nutritional features makes it difficult to exploit its full potential. In this framework, sprouting (or germination) may represent a process capable of improving the macromolecular profile, including reducing anti-nutritional factors and/or synthesizing or releasing bioactives. This study addressed changes in the biomolecular profile and composition of buckwheat that was sprouted for 48 and 72 h. Sprouting increased the content of peptides and free-phenolic compounds and the antioxidant activity, caused a marked decline in the concentration of several anti-nutritional components, and affected the metabolomic profile with an overall improvement in the nutritional characteristics. These results further confirm sprouting as a process suitable for improving the compositional traits of cereals and pseudo-cereals, and are further steps towards the exploitation of sprouted buckwheat as a high-quality ingredient in innovative products of industrial interest.
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Affiliation(s)
- Sara Margherita Borgonovi
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, Via Celoria 2, 20133 Milan, Italy
| | - Elena Chiarello
- Department of Agricultural and Food Sciences (DISTAL), University of Bologna, Piazza Goidanich 60, 47521 Cesena, Italy
| | - Federica Pasini
- Department of Agricultural and Food Sciences (DISTAL), University of Bologna, Piazza Goidanich 60, 47521 Cesena, Italy
- Interdepartmental Centre for Industrial Agri-Food Research (CIRI), University of Bologna, Piazza Goidanich 60, 47521 Cesena, Italy
| | - Gianfranco Picone
- Department of Agricultural and Food Sciences (DISTAL), University of Bologna, Piazza Goidanich 60, 47521 Cesena, Italy
| | - Silvia Marzocchi
- Department of Agricultural and Food Sciences (DISTAL), University of Bologna, Piazza Goidanich 60, 47521 Cesena, Italy
| | - Francesco Capozzi
- Department of Agricultural and Food Sciences (DISTAL), University of Bologna, Piazza Goidanich 60, 47521 Cesena, Italy
- Interdepartmental Centre for Industrial Agri-Food Research (CIRI), University of Bologna, Piazza Goidanich 60, 47521 Cesena, Italy
| | - Alessandra Bordoni
- Department of Agricultural and Food Sciences (DISTAL), University of Bologna, Piazza Goidanich 60, 47521 Cesena, Italy
- Interdepartmental Centre for Industrial Agri-Food Research (CIRI), University of Bologna, Piazza Goidanich 60, 47521 Cesena, Italy
| | - Alberto Barbiroli
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, Via Celoria 2, 20133 Milan, Italy
| | - Alessandra Marti
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, Via Celoria 2, 20133 Milan, Italy
| | - Stefania Iametti
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, Via Celoria 2, 20133 Milan, Italy
| | - Mattia Di Nunzio
- Department of Food, Environmental and Nutritional Sciences (DeFENS), University of Milan, Via Celoria 2, 20133 Milan, Italy
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Schorn-García D, Giussani B, García-Casas MJ, Rico D, Martin-Diana AB, Aceña L, Busto O, Boqué R, Mestres M. Assessment of Variability Sources in Grape Ripening Parameters by Using FTIR and Multivariate Modelling. Foods 2023; 12:foods12050962. [PMID: 36900479 PMCID: PMC10001218 DOI: 10.3390/foods12050962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Revised: 02/21/2023] [Accepted: 02/22/2023] [Indexed: 03/02/2023] Open
Abstract
The variability in grape ripening is associated with the fact that each grape berry undergoes its own biochemical processes. Traditional viticulture manages this by averaging the physicochemical values of hundreds of grapes to make decisions. However, to obtain accurate results it is necessary to evaluate the different sources of variability, so exhaustive sampling is essential. In this article, the factors "grape maturity over time" and "position of the grape" (both in the grapevine and in the bunch/cluster) were considered and studied by analyzing the grapes with a portable ATR-FTIR instrument and evaluating the spectra obtained with ANOVA-simultaneous component analysis (ASCA). Ripeness over time was the main factor affecting the characteristics of the grapes. Position in the vine and in the bunch (in that order) were also significantly important, and their effect on the grapes evolves over time. In addition, it was also possible to predict basic oenological parameters (TSS and pH with errors of 0.3 °Brix and 0.7, respectively). Finally, a quality control chart was built based on the spectra obtained in the optimal state of ripening, which could be used to decide which grapes are suitable for harvest.
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Affiliation(s)
- Daniel Schorn-García
- Instrumental Sensometry (iSens), Department of Analytical Chemistry and Organic Chemistry, Campus Sescelades, Universitat Rovira i Virgili, Edifici N4, C/Marcel⋅lí Domingo s/n, 43007 Tarragona, Spain
| | - Barbara Giussani
- Dipartimento di Scienza e Alta Tecnologia, Università Degli Studi Dell’Insubria, Via Valleggio, 9, 22100 Como, Italy
| | - María Jesús García-Casas
- Consejería de Agricultura y Ganadería, Finca de Zamadueñas, Ctra. Burgos km. 119, 47171 Valladolid, Spain
| | - Daniel Rico
- Consejería de Agricultura y Ganadería, Finca de Zamadueñas, Ctra. Burgos km. 119, 47171 Valladolid, Spain
| | - Ana Belén Martin-Diana
- Consejería de Agricultura y Ganadería, Finca de Zamadueñas, Ctra. Burgos km. 119, 47171 Valladolid, Spain
| | - Laura Aceña
- Instrumental Sensometry (iSens), Department of Analytical Chemistry and Organic Chemistry, Campus Sescelades, Universitat Rovira i Virgili, Edifici N4, C/Marcel⋅lí Domingo s/n, 43007 Tarragona, Spain
| | - Olga Busto
- Instrumental Sensometry (iSens), Department of Analytical Chemistry and Organic Chemistry, Campus Sescelades, Universitat Rovira i Virgili, Edifici N4, C/Marcel⋅lí Domingo s/n, 43007 Tarragona, Spain
| | - Ricard Boqué
- Chemometrics, Qualimetrics and Nanosensors Group, Department of Analytical Chemistry and Organic Chemistry, Campus Sescelades, Universitat Rovira i Virgili, Edifici N4, C/Marcel⋅lí Domingo s/n, 43007 Tarragona, Spain
| | - Montserrat Mestres
- Instrumental Sensometry (iSens), Department of Analytical Chemistry and Organic Chemistry, Campus Sescelades, Universitat Rovira i Virgili, Edifici N4, C/Marcel⋅lí Domingo s/n, 43007 Tarragona, Spain
- Correspondence:
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Selection of Enzymatic Treatments for Upcycling Lentil Hulls into Ingredients Rich in Oligosaccharides and Free Phenolics. Molecules 2022; 27:molecules27238458. [PMID: 36500548 PMCID: PMC9738424 DOI: 10.3390/molecules27238458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 11/27/2022] [Accepted: 11/29/2022] [Indexed: 12/12/2022] Open
Abstract
In this study, the comprehensive chemical characterization of red lentil hulls obtained from the industrial production of football and split lentils was described. The lentil hulls were rich in dietary fiber (78.43 g/100 g dry weight with an insoluble to soluble fiber ratio of 4:1) and polyphenols (49.3 mg GAE/g dry weight, of which 55% was bound phenolics), which revealed the suitability of this lentil by-product as a source of bioactive compounds with recognized antioxidant and prebiotic properties. The release of oligosaccharides and phenolic compounds was accomplished by enzymatic hydrolysis, microwave treatment and a combination of both technologies. The key role played by the selection of a suitable enzymatic preparation was highlighted to maximize the yield of bioactive compounds and the functional properties of the lentil hull hydrolysates. Out of seven commercial preparations, the one with the most potential for use in a commercial context was Pectinex® Ultra Tropical, which produced the highest yields of oligosaccharides (14 g/100 g lentil hull weight) and free phenolics (45.5 mg GAE/100 g lentil hull weight) and delivered a four-fold increase in terms of the original antioxidant activity. Finally, this enzyme was selected to analyze the effect of a microwave-assisted extraction pretreatment on the yield of enzymatic hydrolysis and the content of free phenolic compounds and oligosaccharides. The integrated microwave and enzymatic hydrolysis method, although it increased the solubilization yield of the lentil hulls (from 25% to 34%), it slightly decreased the content of oligosaccharides and proanthocyanidins and reduced the antioxidant activity. Therefore, the enzymatic hydrolysis treatment alone was more suitable for producing a lentil hull hydrolysate enriched in potential prebiotics and antioxidant compounds.
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