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Tarantini A, Crupi P, Ramires FA, D'Amico L, Romano G, Blando F, Branco P, Clodoveo ML, Corbo F, Cardinali A, Bleve G. Study of the effects of pasteurization and selected microbial starters on functional traits of fermented table olives. Food Microbiol 2024; 122:104537. [PMID: 38839217 DOI: 10.1016/j.fm.2024.104537] [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: 12/06/2023] [Revised: 04/05/2024] [Accepted: 04/09/2024] [Indexed: 06/07/2024]
Abstract
Table olives are one of the most known fruit consumed as fermented food, being a fundamental component of the Mediterranean diet. Their production and consumption continue to increase globally and represent an important economic source for the producing countries. One of the most stimulating challenges for the future is the modernization of olive fermentation process. Besides the demand for more reproducible and safer production methods that could be able to reduce product losses and potential risks, producers and consumers are increasingly attracted by the final product characteristics and properties on human health. In this study, the contribution of microbial starters to table olives was fully described in terms of specific enzymatic and microbiological profiles, nutrient components, fermentation-derived compounds, and content of bioactive compounds. The use of microbial starters from different sources was tested considering their technological features and potential ability to improve the functional traits of fermented black table olives. For each fermentation assay, the effects of controlled temperature (kept at 20 °C constantly) versus not controlled environmental conditions (oscillating between 7 and 17 °C), as well as the consequences of the pasteurization treatment were tested on the final products. Starter-driven fermentation strategies seemed to increase both total phenolic content and total antioxidant activity. Herein, among all the tested microbial starters, we provide data indicating that two bacterial strains (Leuconostoc mesenteroides KT 5-1 and Lactiplantibacillus plantarum BC T3-35), and two yeast strains (Saccharomyces cerevisiae 10A and Debaryomyces hansenii A15-44) were the better ones related to enzyme activities, total phenolic content and antioxidant activity. We also demonstrated that the fermentation of black table olives under not controlled environmental temperature conditions was more promising than the controlled level of 20 °C constantly in terms of technological and functional properties considered in this study. Moreover, we confirmed that the pasteurization process had a role in enhancing the levels of antioxidant compounds.
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Affiliation(s)
- Annamaria Tarantini
- Consiglio Nazionale Delle Ricerche - Istituto di Scienze Delle Produzioni Alimentari, Unità Operativa di Lecce, 73100, Lecce, Italy; University of Bari, Soil, Plant and Food Science Department (Di.S.S.P.A), Bari, Italy
| | - Pasquale Crupi
- Dipartimento Interdisciplinare di Medicina, Università Degli Studi Aldo Moro Bari, Piazza Giulio Cesare 11, 70124, Bari, Italy
| | - Francesca Anna Ramires
- Consiglio Nazionale Delle Ricerche - Istituto di Scienze Delle Produzioni Alimentari, Unità Operativa di Lecce, 73100, Lecce, Italy
| | - Leone D'Amico
- Consiglio Nazionale Delle Ricerche - Istituto di Scienze Delle Produzioni Alimentari, Unità Operativa di Lecce, 73100, Lecce, Italy
| | - Giuseppe Romano
- Consiglio Nazionale Delle Ricerche - Istituto di Scienze Delle Produzioni Alimentari, Unità Operativa di Lecce, 73100, Lecce, Italy
| | - Federica Blando
- Consiglio Nazionale Delle Ricerche - Istituto di Scienze Delle Produzioni Alimentari, Unità Operativa di Lecce, 73100, Lecce, Italy
| | | | - Maria Lisa Clodoveo
- Dipartimento Interdisciplinare di Medicina, Università Degli Studi Aldo Moro Bari, Piazza Giulio Cesare 11, 70124, Bari, Italy
| | - Filomena Corbo
- Dipartimento di Farmacia-Scienze Del Farmaco, Università Degli Studi di Bari, Campus Universitario E. Quagliarello Via Orabona, 4-70125, Bari, Italy
| | - Angela Cardinali
- Consiglio Nazionale Delle Ricerche - Istituto di Scienze Delle Produzioni Alimentari, Bari, 70126, Italy
| | - Gianluca Bleve
- Consiglio Nazionale Delle Ricerche - Istituto di Scienze Delle Produzioni Alimentari, Unità Operativa di Lecce, 73100, Lecce, Italy.
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2
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Kourti M, Skaperda Z, Tekos F, Stathopoulos P, Koutra C, Skaltsounis AL, Kouretas D. The Bioactivity of a Hydroxytyrosol-Enriched Extract Originated after Direct Hydrolysis of Olive Leaves from Greek Cultivars. Molecules 2024; 29:299. [PMID: 38257212 PMCID: PMC10818913 DOI: 10.3390/molecules29020299] [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: 11/28/2023] [Revised: 12/29/2023] [Accepted: 01/03/2024] [Indexed: 01/24/2024] Open
Abstract
Nowadays, olive leaf polyphenols have been at the center of scientific interest due to their beneficial effects on human health. The most abundant polyphenol in olive leaves is oleuropein. The biological properties of oleuropein are mainly due to the hydroxytyrosol moiety, a drastic catechol group, whose biological activity has been mentioned many times in the literature. Hence, in recent years, many nutritional supplements, food products, and cosmetics enriched in hydroxytyrosol have been developed and marketed, with unexpectedly positive results. However, the concentration levels of hydroxytyrosol in olive leaves are low, as it depends on several agricultural factors. In this study, a rapid and easy methodology for the production of hydroxytyrosol-enriched extracts from olive leaves was described. The proposed method is based on the direct acidic hydrolysis of olive leaves, where the extraction procedure and the hydrolysis of oleuropein are carried out in one step. Furthermore, we tested the in vitro bioactivity of this extract using cell-free and cell-based methods, evaluating its antioxidant and DNA-protective properties. Our results showed that the hydroxytyrosol-enriched extract produced after direct hydrolysis of olive leaves exerted significant in vitro antioxidant and geno-protective activity, and potentially these extracts could have various applications in the pharmaceutical, food, and cosmetic industries.
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Affiliation(s)
- Maria Kourti
- Laboratory of Animal Physiology, Department of Biochemistry-Biotechnology, School of Health Sciences, University of Thessaly, 41500 Larissa, Greece; (M.K.); (Z.S.); (F.T.)
| | - Zoi Skaperda
- Laboratory of Animal Physiology, Department of Biochemistry-Biotechnology, School of Health Sciences, University of Thessaly, 41500 Larissa, Greece; (M.K.); (Z.S.); (F.T.)
| | - Fotios Tekos
- Laboratory of Animal Physiology, Department of Biochemistry-Biotechnology, School of Health Sciences, University of Thessaly, 41500 Larissa, Greece; (M.K.); (Z.S.); (F.T.)
| | - Panagiotis Stathopoulos
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, University of Athens, 15771 Athens, Greece; (P.S.); (C.K.); (A.L.S.)
| | - Christina Koutra
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, University of Athens, 15771 Athens, Greece; (P.S.); (C.K.); (A.L.S.)
| | - Alexios Leandros Skaltsounis
- Department of Pharmacognosy and Natural Products Chemistry, Faculty of Pharmacy, University of Athens, 15771 Athens, Greece; (P.S.); (C.K.); (A.L.S.)
| | - Demetrios Kouretas
- Laboratory of Animal Physiology, Department of Biochemistry-Biotechnology, School of Health Sciences, University of Thessaly, 41500 Larissa, Greece; (M.K.); (Z.S.); (F.T.)
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3
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Ramires FA, Durante M, D’Antuono I, Garbetta A, Bruno A, Tarantini A, Gallo A, Cardinali A, Bleve G. Novel Fermentation Strategies of Strawberry Tree Arbutus unedo Fruits to Obtain High Nutritional Value Products. Int J Mol Sci 2024; 25:684. [PMID: 38255758 PMCID: PMC10815911 DOI: 10.3390/ijms25020684] [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: 12/01/2023] [Revised: 12/22/2023] [Accepted: 12/31/2023] [Indexed: 01/24/2024] Open
Abstract
The strawberry tree (Arbustus unedo) is a medicinal plant and an important source of biocompounds, potentially useful for pharmaceutical and chemical applications to prevent or treat several human diseases. The strawberry tree fruits have usually been used to produce traditional products such as jams and jellies and to obtain fermented alcoholic drinks, representing the most valuable derivative products. Other fermented products are potentially interesting for their nutritional value; however, the fermentation process needs to be controlled and standardized to obtain high-quality products/ingredients. In this work, we investigated two different fermentative procedures, using strawberry tree whole fruit and fruit paste as matrices inoculated with a selected starter strain of Saccharomyces cerevisiae LI 180-7. The physical, chemical, microbiological and nutritional properties of fermented products were evaluated, as well as their antioxidant activity. The new obtained fermented products are enriched in organic acids (acetic acid varied from 39.58 and 57.21 mg/g DW and lactic acid from 85.33 to 114.1 mg/g DW) and have better nutritional traits showing a higher amount of total polyphenols (phenolic acids, flavonoids and anthocyanins) that ranged from 1852 mg GAE/100 g DW to 2682 mg GAE/100 g DW. Also, the amount of isoprenoid increased ranging from 155.5 μg/g DW to 164.61 μg/g DW. In this regard, the most promising strategy seemed to be the fermentation of the fruit paste preparation; while the extract of fermented whole fruits showed the most powerful antioxidant activity. Finally, a preliminary attempt to produce a food prototype enriched in fermented strawberry tree fruits suggested the whole fruit fermented sample as the most promising from a preliminary sensory analysis.
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Affiliation(s)
- Francesca Anna Ramires
- Consiglio Nazionale delle Ricerche, Istituto di Scienze delle Produzioni Alimentari, Unità Operativa di Lecce, 73100 Lecce, Italy; (F.A.R.); (M.D.); (A.T.); (A.G.)
| | - Miriana Durante
- Consiglio Nazionale delle Ricerche, Istituto di Scienze delle Produzioni Alimentari, Unità Operativa di Lecce, 73100 Lecce, Italy; (F.A.R.); (M.D.); (A.T.); (A.G.)
| | - Isabella D’Antuono
- Consiglio Nazionale delle Ricerche, Istituto di Scienze delle Produzioni Alimentari, 70126 Bari, Italy; (I.D.); (A.G.); (A.B.)
| | - Antonella Garbetta
- Consiglio Nazionale delle Ricerche, Istituto di Scienze delle Produzioni Alimentari, 70126 Bari, Italy; (I.D.); (A.G.); (A.B.)
| | - Angelica Bruno
- Consiglio Nazionale delle Ricerche, Istituto di Scienze delle Produzioni Alimentari, 70126 Bari, Italy; (I.D.); (A.G.); (A.B.)
| | - Annamaria Tarantini
- Consiglio Nazionale delle Ricerche, Istituto di Scienze delle Produzioni Alimentari, Unità Operativa di Lecce, 73100 Lecce, Italy; (F.A.R.); (M.D.); (A.T.); (A.G.)
- Department of Soil, Plant and Food Sciences (Di.S.S.P.A), University of Bari, 70126 Bari, Italy
| | - Antonia Gallo
- Consiglio Nazionale delle Ricerche, Istituto di Scienze delle Produzioni Alimentari, Unità Operativa di Lecce, 73100 Lecce, Italy; (F.A.R.); (M.D.); (A.T.); (A.G.)
| | - Angela Cardinali
- Consiglio Nazionale delle Ricerche, Istituto di Scienze delle Produzioni Alimentari, 70126 Bari, Italy; (I.D.); (A.G.); (A.B.)
| | - Gianluca Bleve
- Consiglio Nazionale delle Ricerche, Istituto di Scienze delle Produzioni Alimentari, Unità Operativa di Lecce, 73100 Lecce, Italy; (F.A.R.); (M.D.); (A.T.); (A.G.)
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4
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Olmo-Cunillera A, Pérez M, López-Yerena A, Abuhabib MM, Ninot A, Romero-Aroca A, Vallverdú-Queralt A, Maria Lamuela-Raventós R. Targeted metabolic profiling of the revived ancient 'Corbella' olive cultivar during early maturation. Food Chem 2024; 430:137024. [PMID: 37527576 DOI: 10.1016/j.foodchem.2023.137024] [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: 02/25/2023] [Revised: 07/07/2023] [Accepted: 07/25/2023] [Indexed: 08/03/2023]
Abstract
'Corbella' is an ancient olive cultivar whose cultivation has recently been revived and hence little is known about its composition. This is the first work studying the metabolic profile of 'Corbella' olives during early maturation. Olives with a ripening index (RI) < 1 yielded considerably less oil content (<40%) but had more concentration of phenolic compounds (148.41-219.70 mg/kg), carotenoids (9.61-14.94 mg/kg) and squalene (521.41-624.40 mg/kg). Contrarily, the levels of α-tocopherol were higher at the RI of 1.08 and 1.96 (64.57 and 57.75 mg/kg, respectively). The most abundant phenolic compound was oleuropein aglycone (>50% of the phenolic composition), suggesting a high hydrolytic activity of β-glucosidase in the fruit. The antioxidant capacity was barely affected, while oleic/linoleic ratio reached its highest at RI of 1.96. Therefore, olives with an RI below 2 could be good candidates to produce high-quality olive oils with good level of stability.
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Affiliation(s)
- Alexandra Olmo-Cunillera
- Polyphenol Research Group, Department of Nutrition, Food Science and Gastronomy, XIA, Faculty of Pharmacy and Food Sciences, Institute of Nutrition and Food Safety (INSA-UB), University of Barcelona, 08028 Barcelona, Spain; CIBER Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III, 28029 Madrid, Spain.
| | - Maria Pérez
- Polyphenol Research Group, Department of Nutrition, Food Science and Gastronomy, XIA, Faculty of Pharmacy and Food Sciences, Institute of Nutrition and Food Safety (INSA-UB), University of Barcelona, 08028 Barcelona, Spain; CIBER Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III, 28029 Madrid, Spain.
| | - Anallely López-Yerena
- Polyphenol Research Group, Department of Nutrition, Food Science and Gastronomy, XIA, Faculty of Pharmacy and Food Sciences, Institute of Nutrition and Food Safety (INSA-UB), University of Barcelona, 08028 Barcelona, Spain
| | - Mohamed M Abuhabib
- Polyphenol Research Group, Department of Nutrition, Food Science and Gastronomy, XIA, Faculty of Pharmacy and Food Sciences, Institute of Nutrition and Food Safety (INSA-UB), University of Barcelona, 08028 Barcelona, Spain
| | - Antònia Ninot
- Institute of Agrifood Research and Technology (IRTA), Fruit Science Program, Olive Growing and Oil Technology Research Team, 43120 Constantí, Spain
| | - Agustí Romero-Aroca
- Institute of Agrifood Research and Technology (IRTA), Fruit Science Program, Olive Growing and Oil Technology Research Team, 43120 Constantí, Spain
| | - Anna Vallverdú-Queralt
- Polyphenol Research Group, Department of Nutrition, Food Science and Gastronomy, XIA, Faculty of Pharmacy and Food Sciences, Institute of Nutrition and Food Safety (INSA-UB), University of Barcelona, 08028 Barcelona, Spain; CIBER Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III, 28029 Madrid, Spain
| | - Rosa Maria Lamuela-Raventós
- Polyphenol Research Group, Department of Nutrition, Food Science and Gastronomy, XIA, Faculty of Pharmacy and Food Sciences, Institute of Nutrition and Food Safety (INSA-UB), University of Barcelona, 08028 Barcelona, Spain; CIBER Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III, 28029 Madrid, Spain.
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5
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Rodríguez-Gómez F, Valero A, Vives Lara E, Marín A, Ramírez EM. LP309 a new strain of Lactiplantibacillus pentosus that improves the lactic fermentation of Spanish-style table olives. J Food Sci 2023; 88:5191-5202. [PMID: 37872810 DOI: 10.1111/1750-3841.16802] [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: 04/20/2023] [Revised: 08/11/2023] [Accepted: 09/29/2023] [Indexed: 10/25/2023]
Abstract
Different varieties of table olives have suitable morphological characteristics that allow them to be processed as Spanish-style green table olives. However, the Campiñesa cultivar presents difficulties when submitted to a lactic fermentation, in spite of being inoculated with dedicated starter cultures such as OleicaStarter. The strategy followed in this study to facilitate the start of lactic fermentation was to reinforce the OleicaStarter culture with the use of the Lactoplantibacillus pentosus Lp309 a strain that enhanced the survival of lactic acid bacteria (LAB) at the beginning of fermentation, reaching final pH values (4.08 ± 0.01), free acidity (1.00 ± 0.01 g/100 mL of brine), LAB population (6.17 ± 0.09 log CFU/mL), nutrient depletion (0.80 ± 0.09 g/kg of pulp), and lactic acid production (11.85 ± 0.72 g/L). These values allowed stabilization of the final product, thus complying with the quality and food safety standards established by the Codex Alimentarius for table olives.
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Affiliation(s)
| | - Antonio Valero
- Department of Food Science and Technology, UIC Zoonosis y Enfermedades Emergentes (ENZOEM), CeiA3, Universidad de Córdoba, Campus Rabanales, Córdoba, Spain
| | - Elena Vives Lara
- Technological Applications for Improvement of Quality and Safety in Foods. R&D Division, Avda, Diego Martínez Barrio 10 2ª Planta, Seville, Spain
| | - Ana Marín
- Technological Applications for Improvement of Quality and Safety in Foods. R&D Division, Avda, Diego Martínez Barrio 10 2ª Planta, Seville, Spain
| | - Eva María Ramírez
- Food Biotechnology Department, Instituto de la Grasa (IG), CSIC, Seville, Spain
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Ambra R, Pastore G, Natella F. The Fate of Chlorophylls in Alkali-Treated Green Table Olives: A Review. Molecules 2023; 28:6673. [PMID: 37764449 PMCID: PMC10534587 DOI: 10.3390/molecules28186673] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Revised: 09/06/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
This paper reviews the current knowledge regarding modifications to chlorophylls during the processing of green table olives treated with alkali. Particular attention is given to the pheophytinization reactions (substitution of Mg2+ by 2H+ in the chlorophyll chromophore group) that can take place because of pH and/or temperature changes and the possible sequential substitution of the 2H+ with Cu2+ within the chlorophyll porphyrin ring. These reactions may have a direct impact on the commercial value of olive productions as some naturally forming Cu-chlorophylls complexes (i) are identical to strictly forbidden colorants for table olives (E141) and (ii) have been identified as responsible for the unwelcome appearance of the so-called green staining alteration (characterized by bluish-green zones distributed over the olive skin of the drupes).
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Affiliation(s)
| | | | - Fausta Natella
- CREA (Council for Agricultural Research and Economics), Research Centre for Food and Nutrition, 00178 Rome, Italy; (R.A.); (G.P.)
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Ruiz-Barba JL, Sánchez AH, López-López A, Cortés-Delgado A, Montaño A. Microbial and Chemical Characterization of Natural-Style Green Table Olives from the Gordal, Hojiblanca and Manzanilla Cultivars. Foods 2023; 12:2386. [PMID: 37372597 DOI: 10.3390/foods12122386] [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: 05/15/2023] [Revised: 06/13/2023] [Accepted: 06/14/2023] [Indexed: 06/29/2023] Open
Abstract
Microbial and biochemical changes in the brine during the spontaneous fermentation of Gordal, Hojiblanca and Manzanilla olive cultivars processed according to the natural style were monitored. The microbial composition was assessed through a metagenomic study. Sugars, ethanol, glycerol, organic acids and phenolic compounds were quantified by standard methods. In addition, the volatile profiles, contents of phenolic compounds in the olives and quality parameters of the final products were compared. Fermentation in Gordal brines was conducted by lactic acid bacteria (mainly Lactobacillus and Pediococcus) and yeasts (mainly Candida boidinii, Candida tropicalis and Wickerhamomyces anomalus). In Hojiblanca and Manzanilla brines, halophilic Gram-negative bacteria (e.g., Halomonas, Allidiomarina and Marinobacter) along with yeasts (mainly, Saccharomyces) were responsible for the fermentation. Higher acidity and lower pH values were reached in Gordal brines compared to Hojiblanca and Manzanilla. After 30 days of fermentation, no sugars were detected in Gordal brine, but residual amounts were found in the brines from Hojiblanca (<0.2 g/L glucose) and Manzanilla (2.9 g/L glucose and 0.2 g/L fructose). Lactic acid was the main acid product in Gordal fermentation, whereas citric acid was the predominant organic acid in the Hojiblanca and Manzanilla brines. Manzanilla brine samples showed a greater concentration of phenolic compounds than Hojiblanca and Gordal brines. After a 6-month fermentation, Gordal olives were superior compared to the Hojiblanca and Manzanilla varieties regarding product safety (lower final pH and absence of Enterobacteriaceae), content of volatile compounds (richer aroma), content of bitter phenolics (lower content of oleuropein, which resulted in less perceived bitterness) and color parameters (more yellow and lighter color, indicating a higher visual appraisal). The results of the present study will contribute to a better understanding of each fermentation process and could help to promote natural-style elaborations using the above-mentioned olive cultivars.
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Affiliation(s)
- José Luis Ruiz-Barba
- Food Biotechnology Department, Instituto de la Grasa (CSIC), Carretera de Utrera, Km. 1, 41013 Seville, Spain
| | - Antonio Higinio Sánchez
- Food Biotechnology Department, Instituto de la Grasa (CSIC), Carretera de Utrera, Km. 1, 41013 Seville, Spain
| | - Antonio López-López
- Food Biotechnology Department, Instituto de la Grasa (CSIC), Carretera de Utrera, Km. 1, 41013 Seville, Spain
| | - Amparo Cortés-Delgado
- Food Biotechnology Department, Instituto de la Grasa (CSIC), Carretera de Utrera, Km. 1, 41013 Seville, Spain
| | - Alfredo Montaño
- Food Biotechnology Department, Instituto de la Grasa (CSIC), Carretera de Utrera, Km. 1, 41013 Seville, Spain
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Morales-Sillero A, Jiménez MR, Suárez MP, Rallo P, Casanova L. Mechanical harvesting at dawn in a super-high-density table olive orchard: effect on the quality of fruits. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2023; 103:2989-2996. [PMID: 36510840 DOI: 10.1002/jsfa.12384] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2022] [Revised: 12/03/2022] [Accepted: 12/13/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Mechanical harvesting with over-the-row harvesters in super-high-density (SHD) table olive orchards increases the effectiveness of fruit removal, although bruising can limit the fruit quality. Additionally, an early harvest in periods less favourable to quality production is increasingly frequent as a result of global warming. The present study explores the impact on olive quality of harvesting at dawn when the environmental temperature is low. The study was carried out for 2 years on two cultivars with different tolerance to bruising ('Manzanilla de Sevilla' and 'Manzanilla Cacereña'), grown in SHD conditions and harvested at two timepoints: dawn and morning. RESULTS Fruit morphology was not modified by the moment of harvest in either of the cultivars. Fruit harvested at dawn produced less CO2 and ethylene and was less damaged externally and internally compared to fruit harvested in the morning. However, environmental conditions throughout development influenced the response because the highest values of bruising (incidence, area and volume of damaged area), total internal damage and the number of tissue ruptures increased in the year with the hottest summer, and the differences between harvest treatments were less evident. CONCLUSION Mechanical harvesting at dawn contributes to reducing the damage in olive fruit. © 2022 The Authors. Journal of The Science of Food and Agriculture published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry.
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Affiliation(s)
| | | | - María Paz Suárez
- Departamento de Agronomía, ETSIA, Universidad de Sevilla, Sevilla, Spain
| | - Pilar Rallo
- Departamento de Agronomía, ETSIA, Universidad de Sevilla, Sevilla, Spain
| | - Laura Casanova
- Departamento de Agronomía, ETSIA, Universidad de Sevilla, Sevilla, Spain
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9
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Olive Leaf Processing for Infusion Purposes. Foods 2023; 12:foods12030591. [PMID: 36766119 PMCID: PMC9914354 DOI: 10.3390/foods12030591] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/17/2023] [Accepted: 01/24/2023] [Indexed: 01/31/2023] Open
Abstract
Olive leaf is a by-product rich in bioactive compounds, such as polyphenols and triterpenic acids, with numerous biological activities for human health. Nowadays, the existence of dry olive leaves marketed for infusion elaboration is lacking. During the elaboration process, the drying and grinding stages are critical for the conservation of bioactive compounds, and, precisely, the existing research on olive leaf production procedures is quite scarce. This work aimed to study and model the dehydration process using a forced-air oven and infrared with air convection systems. In addition, different grinding grades were studied. The kinetic constant and activation energy during dehydration were obtained. Drying temperatures above 50 °C produced a decrease in the phenolic concentration of olive leaves; however, it has been observed that prior storage of 24 h at room temperature considerably reduced the loss of phenols. Likewise, it was observed that the higher the degree of grinding, the greater the diffusion of both bioactive compounds and colored compounds. Therefore, the drying and grinding stages were closely related to the content of beneficial compounds and the appearance of the infusions, and their optimization was of crucial importance to produce dried olive leaves rich in biocompounds for use as healthy infusions.
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10
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Tang F, Li C, Yang X, Lei J, Chen H, Zhang C, Wang C. Effect of Variety and Maturity Index on the Physicochemical Parameters Related to Virgin Olive Oil from Wudu (China). Foods 2022; 12:foods12010007. [PMID: 36613224 PMCID: PMC9818180 DOI: 10.3390/foods12010007] [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: 10/31/2022] [Revised: 12/08/2022] [Accepted: 12/14/2022] [Indexed: 12/24/2022] Open
Abstract
Physical parameters (i.e., extraction yield, oil content), chemicals (i.e., fatty acids, phenolics) and oxidative stability associated with virgin olive oil (VOO) from ten varieties in Wudu, China, were analyzed as a function of maturity index and variety by multivariate analysis models. Most of the analytical parameters were significantly affected by the variety and maturity index, and the former was more influential than the latter. Phenolics were the principal factor dividing the ten varieties into four groups. High phenolic levels were observed in the 'Koroneiki' group and 'Manzanilla' group, but the oil extractability index differentiated between them, being the highest and lowest, respectively. The 'Koroneiki' group demonstrated high oil productivity and oil quality, which was worthy of promotion in large-scale cultivation. High amounts of linoleic enhanced the VOO health benefits of 'Ascolana tenera, Arbequina and Zhongshan24' group, but brought the risk of shortening the shelf-life. The 'Ulliri Bardhe, Empeltre, Ezhi8, Yuntai14 and Picual' group clustered for the higher relative value of oleic acid. The maturity index had significant negative effects on the content of total phenolics, oleacein, oleocanthal, and oleic acid, but had a positive effect on the extractability index, which suggested that varieties with low phenolics and oleic acid levels should be harvested early.
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Affiliation(s)
- Fengxia Tang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210042, China
| | - Chuan Li
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210042, China
| | - Xiaoran Yang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210042, China
| | - Jiandu Lei
- College of Materials Science and Technology, Beijing Forestry University, Beijing 100083, China
| | - Hongxia Chen
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
| | - Changwei Zhang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210042, China
| | - Chengzhang Wang
- Institute of Chemical Industry of Forest Products, Chinese Academy of Forestry, Nanjing 210042, China
- Co-Innovation Center of Efficient Processing and Utilization of Forest Resources, Nanjing Forestry University, Nanjing 210042, China
- Correspondence:
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11
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Ramírez EM, Brenes M, Romero C, Medina E. Chemical and Enzymatic Characterization of Leaves from Spanish Table Olive Cultivars. Foods 2022; 11:foods11233879. [PMID: 36496690 PMCID: PMC9738326 DOI: 10.3390/foods11233879] [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: 10/10/2022] [Revised: 11/17/2022] [Accepted: 11/28/2022] [Indexed: 12/03/2022] Open
Abstract
Olive leaves are generated as by-products in the olive industry and contain substances with biological properties that provide health benefits. Although these compounds have been characterized in many leaves from olive cultivars devoted to olive oil extraction, few data are available on leaves from the processing of table olives. In this study, the concentration of polyphenols, triterpenic acids, sugars and enzymatic activities (polyphenol oxidase, peroxidase, β-glucosidase and esterase) were determined in the leaves of the olive tree (Olea europaea L.) of cvs. Aloreña, Cacereña, Empeltre, Hojiblanca, Manzanilla, Verdial, Gordal and Morona. The mean total phenolic content in olive leaves reached 75.58 g/kg fresh weight, and oleuropein was the main polyphenol identified (89.7-96.5%). The main triterpenic acid identified was oleanolic acid, and the main sugar was mannitol, with mean values of 15.83 and 22.31 g/kg, respectively. However, the content of these biocompounds was influenced by the type of cultivar and the orchards of origin. The highest oleuropein content was found in the Manzanilla variety, while the Gordal had the highest triterpene and mannitol content. In particular, the phenolic content could also be affected by endogenous enzymatic activities. High polyphenol oxidase, peroxidase and β-glucosidase activity and low esterase activity were detected, compared to the fruit. Similar to the phenolic compounds, enzymatic activities varied with the harvesting season. The lowest phenolic content corresponded to the highest polyphenol oxidase activity detected during spring. The rest of the enzymatic activities also varied throughout the year, but no common trend was observed.
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12
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García-Serrano P, Brenes M, Romero C, García-García P. Reuse of KOH Solutions during Black Ripe Olive Processing, Effect on the Quality of the Final Product and Valorization of Wastewaters as Possible Fertilizer Product. Foods 2022; 11:foods11121749. [PMID: 35741949 PMCID: PMC9222265 DOI: 10.3390/foods11121749] [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: 05/16/2022] [Revised: 06/07/2022] [Accepted: 06/13/2022] [Indexed: 02/06/2023] Open
Abstract
A high volume of water is needed to produce black ripe olives, which also entails a significant volume of wastewater with a high organic and inorganic contaminant charge. To reduce this problem, the reuse of KOH solutions (lyes) in a new process was studied. Once the lyes were removed from the tanks, KOH was then added for a new darkening process. Reusing the lyes up to four times gave rise to a product with similar physico–chemical and organoleptic characteristics as obtained with fresh solutions. The application of this process reduced coadjutant consumption by 32% and water by 20%, while global wastewater presented a high K content whose concentration could be valorized as a fertilizer by replacing commercial potassium nitrate.
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13
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Contreras MDM, Gómez-Cruz I, Feriani A, Alwasel S, Harrath AH, Romero I, Castro E, Tlili N. Hepatopreventive properties of hydroxytyrosol and mannitol-rich extracts obtained from exhausted olive pomace using green extraction methods. Food Funct 2022; 13:11915-11928. [DOI: 10.1039/d2fo00888b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Hydroxytyrosol and mannitol rich extracts from exhausted olive pomace were obtained by green extraction methodologies. Supplementation of these extracts alleviated CCl4-induced hepatic damage and protected DNA.
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Affiliation(s)
- María del Mar Contreras
- Department of Chemical, Environmental and Materials Engineering, Universidad de Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
- Centre for Advanced Studies in Earth Sciences, Energy and Environment (CEACTEMA), Universidad de Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
| | - Irene Gómez-Cruz
- Department of Chemical, Environmental and Materials Engineering, Universidad de Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
- Centre for Advanced Studies in Earth Sciences, Energy and Environment (CEACTEMA), Universidad de Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
| | - Anouar Feriani
- Laboratory of Biotechnology and Biomonitoring of the Environment and Oasis Ecosystems. Faculty of Sciences of Gafsa, 2112 Gafsa, Tunisia
| | - Saleh Alwasel
- King Saud University, Department of Zoology, College of Science, Riyadh 11451, Saudi Arabia
| | - Abdel Halim Harrath
- King Saud University, Department of Zoology, College of Science, Riyadh 11451, Saudi Arabia
| | - Inmaculada Romero
- Department of Chemical, Environmental and Materials Engineering, Universidad de Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
- Centre for Advanced Studies in Earth Sciences, Energy and Environment (CEACTEMA), Universidad de Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
| | - Eulogio Castro
- Department of Chemical, Environmental and Materials Engineering, Universidad de Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
- Centre for Advanced Studies in Earth Sciences, Energy and Environment (CEACTEMA), Universidad de Jaén, Campus Las Lagunillas, 23071 Jaén, Spain
| | - Nizar Tlili
- Institut Supérieur des Sciences et Technologies de l'Environnement, Université de Carthage, Tunisia
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14
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Abstract
Oleuropein, a bitter substance that exists in olive leaves, can be hydrolyzed to hydroxytyrosol. These are the main phenolic compounds, and they have beneficial properties to human bodies. In this study, we established a simple and new method to determine oleuropein and hydroxytyrosol quickly by HPLC. HPLC conditions were set as follows: water (A) acetonitrile (B) as mobile phase, gradient elution orders: 90%A–10%B for 0–10 min, 80%A–20%B for 14–30 min, and then change to 90%A–10%B for 30–33 min; detection wavelength: 280 nm. Compared with other detection methods, the method simplified the elution procedure and shortened the time. Additionally, we provided a better drying method and preservation of olive leaves in tea drinking production that were air-dried at room temperature of 25 °C.
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15
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Manzano-Nicolas J, Taboada-Rodriguez A, Teruel-Puche JA, Marin-Iniesta F, Garcia-Molina F, Garcia-Canovas F, Tudela-Serrano J, Munoz-Munoz J. Enzymatic oxidation of oleuropein and 3-hydroxytyrosol by laccase, peroxidase, and tyrosinase. J Food Biochem 2021; 45:e13803. [PMID: 34219246 DOI: 10.1111/jfbc.13803] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Revised: 04/14/2021] [Accepted: 04/28/2021] [Indexed: 01/08/2023]
Abstract
The oxidation of oleuropein and 3-hydroxytyrosol by oxidases laccase, tyrosinase, and peroxidase has been studied. The use of a spectrophotometric method and another spectrophotometric chronometric method has made it possible to determine the kinetic parameters Vmax and KM for each enzyme. The highest binding affinity was shown by laccase. The antioxidant capacities of these two molecules have been characterized, finding a very similar primary antioxidant capacity between them. Docking studies revealed the optimal binding position, which was the same for the two molecules and was a catalytically active position. PRACTICAL APPLICATIONS: One of the biggest environmental problems in the food industry comes from olive oil mill wastewater with a quantity of approximately 30 million tons per year worldwide. In addition, olive pomace, the solid residue obtained from the olive oil production, is rich in hydroxytyrosol and oleuropein and the action of enzymatic oxidases can give rise to products in their reactions that can lead to polymerization. This polymerization can have beneficial effects because it can increase the antioxidant capacity with potential application on new functional foods or as feed ingredients. Tyrosinase, peroxidase, and laccase are the enzymes degrading these important polyphenols. The application of a spectrophotometric method for laccase and a chronometric method, for tyrosinase and peroxidase, allowed us to obtain the kinetic information of their reactions on hydroxytyrosol and oleuropein. The kinetic information obtained could advance in the understanding of the mechanism of these important industrial enzymes.
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Affiliation(s)
- Jesus Manzano-Nicolas
- Group of research Food Biotechnology-BTA, Department of Food Technology, Nutrition and Bromatology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Murcia, Spain
| | - Amaury Taboada-Rodriguez
- Group of research Food Biotechnology-BTA, Department of Food Technology, Nutrition and Bromatology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Murcia, Spain
| | - Jose Antonio Teruel-Puche
- Group of Molecular Interactions in Membranes, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Murcia, Spain
| | - Fulgencio Marin-Iniesta
- Group of research Food Biotechnology-BTA, Department of Food Technology, Nutrition and Bromatology, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Murcia, Spain
| | - Francisco Garcia-Molina
- GENZ-Group of research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Murcia, Spain
| | - Francisco Garcia-Canovas
- GENZ-Group of research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Murcia, Spain
| | - Jose Tudela-Serrano
- GENZ-Group of research on Enzymology, Department of Biochemistry and Molecular Biology-A, Regional Campus of International Excellence "Campus Mare Nostrum", University of Murcia, Murcia, Spain
| | - Jose Munoz-Munoz
- Microbial Enzymology Group (MEG), Department of Applied Sciences, Northumbria University, Newcastle Upon Tyne, UK
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16
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Optimization of bioconversion of oleuropein, of olive leaf extract, to hydroxytyrosol by Nakazawaea molendini-olei using HPLC-UV and a method of experimental design. J Microbiol Methods 2020; 176:106010. [DOI: 10.1016/j.mimet.2020.106010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 07/19/2020] [Accepted: 07/21/2020] [Indexed: 01/10/2023]
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17
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18
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Cavaca LA, López-Coca IM, Silvero G, Afonso CA. The olive-tree leaves as a source of high-added value molecules: Oleuropein. BIOACTIVE NATURAL PRODUCTS 2020. [DOI: 10.1016/b978-0-12-817903-1.00005-x] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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19
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Medina E, Romero C, García P, Brenes M. Characterization of bioactive compounds in commercial olive leaf extracts, and olive leaves and their infusions. Food Funct 2019; 10:4716-4724. [PMID: 31304950 DOI: 10.1039/c9fo00698b] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
A large spectrum of beneficial health properties has been attributed to olive leaves. This study was undertaken to characterize the bioactive compounds of commercial olive leaf extracts and olive leaves and their infusions. High variability of bioactive compounds was found among commercial samples. Polyphenol was detected in a range of 44-108 g kg-1 and 7.5-250 g kg-1 for olive leaves and olive leaf extracts, respectively. The main phenol was oleuropein, representing 74-94% of total phenols. However, only 17-26% of polyphenols were diffused to the aqueous phases when olive leaf infusions were prepared. Triterpenic acids were found in a range of 26-37 g kg-1 in olive leaves, but not detected in the infusions. Hence, the absence of the latter substances and the low oleuropein diffusion in olive leaf infusions make new studies necessary to maximize the presence of these bioactive compounds in the final product.
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Affiliation(s)
- Eduardo Medina
- Food Biotechnology Department. Instituto de la Grasa (IG-CSIC), Ctra. Utrera km 1, Building 46, 41013, Seville, Spain.
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20
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Sánchez-Rodríguez L, Cano-Lamadrid M, Carbonell-Barrachina ÁA, Wojdyło A, Sendra E, Hernández F. Polyphenol Profile in Manzanilla Table Olives As Affected by Water Deficit during Specific Phenological Stages and Spanish-Style Processing. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2019; 67:661-670. [PMID: 30571919 DOI: 10.1021/acs.jafc.8b06392] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Reducing water consumption on agriculture is a worldwide goal toward sustainability. In this scenario, two experiments of regulated deficit irrigation (RDI) were carried out on olive trees, cultivar Manzanilla. With regard to experiment A, three RDI techniques were applied during the olive pit hardening period (stage II), while in experiment B, two RDI treatments were applied during the rehydration phase (stage III). Table olives under RDI are so-called hydroSOStainable. The effect of water deficit and Spanish-style processing was studied on the polyphenol profile, antioxidant capacity, and total polyphenol content (TPC) of both raw olives (RO) and table olives (TO). The TPC decreased after processing of TO. It could be due to osmotic mechanisms. However, many individual polyphenols, such as oleuropein (main polyphenol) or oleoside diglucoside, increased their concentrations in hydroSOStainable TO. Additionally, the TPC content was correlated to the phenological stage of the fruit when the stress is applied. A moderate stress during pit hardening and an intense stress during the rehydration phase were the treatments that best improved the polyphenol profile.
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Affiliation(s)
| | | | | | - Aneta Wojdyło
- Department of Fruit, Vegetable and Plant Nutraceutical Technology , Wrocław University of Environmental and Life Sciences , 37 Chełmoñskiego Street , 51-630 Wroclaw , Poland
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21
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Enrichment in phenolic compounds of black ripe olives through nano-filtration and vacuum evaporation techniques. INNOV FOOD SCI EMERG 2019. [DOI: 10.1016/j.ifset.2018.03.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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22
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Guggenheim K, Crawford LM, Paradisi F, Wang SC, Siegel JB. β-Glucosidase Discovery and Design for the Degradation of Oleuropein. ACS OMEGA 2018; 3:15754-15762. [PMID: 30556012 PMCID: PMC6288900 DOI: 10.1021/acsomega.8b02169] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Accepted: 10/29/2018] [Indexed: 05/11/2023]
Abstract
Current lye processing for debittering California black table olives produces large amounts of caustic wastewater and destroys many of the beneficial phenolic compounds in the fruit. Herein, we propose using enzyme treatment in place of lye, potentially reducing the amount and causticity of wastewater produced. By specifically targeting the bitterness-causing compound, oleuropein, retention of other beneficial phenolics may be possible. A β-glucosidase from Streptomyces sp. was identified from a screen of 22 glycosyl hydrolases to completely degrade oleuropein in 24 h. Computational modeling was performed on this enzyme, and mutation C181A was found to improve the rate of catalysis by 3.2-fold. This mutant was tested in the context of the olive fruit and leaf extract. Degradation was observed in the olive leaf extract but not in the fruit matrix, suggesting that enzyme fruit penetration is a limiting factor. This work discovers and begins the refinement process for an enzyme that has the catalytic properties for debittering olives and provides direction for future engineering efforts required to make a product with commercial value.
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Affiliation(s)
- Kathryn
G. Guggenheim
- Department
of Chemistry, Biochemistry & Molecular Medicine, and
the Genome Center, Department of Food Science and Technology, and Olive Center, Robert Mondavi Institute
for Wine and Food Science, University of
California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Lauren M. Crawford
- Department
of Chemistry, Biochemistry & Molecular Medicine, and
the Genome Center, Department of Food Science and Technology, and Olive Center, Robert Mondavi Institute
for Wine and Food Science, University of
California, Davis, One Shields Avenue, Davis, California 95616, United States
| | - Francesca Paradisi
- Department
of Chemistry, Biochemistry & Molecular Medicine, and
the Genome Center, Department of Food Science and Technology, and Olive Center, Robert Mondavi Institute
for Wine and Food Science, University of
California, Davis, One Shields Avenue, Davis, California 95616, United States
- School
of Chemistry, University of Nottingham, University Park, Nottingham NG7 2RD, U.K.
| | - Selina C. Wang
- Department
of Chemistry, Biochemistry & Molecular Medicine, and
the Genome Center, Department of Food Science and Technology, and Olive Center, Robert Mondavi Institute
for Wine and Food Science, University of
California, Davis, One Shields Avenue, Davis, California 95616, United States
- E-mail: (J.B.S.)
| | - Justin B. Siegel
- Department
of Chemistry, Biochemistry & Molecular Medicine, and
the Genome Center, Department of Food Science and Technology, and Olive Center, Robert Mondavi Institute
for Wine and Food Science, University of
California, Davis, One Shields Avenue, Davis, California 95616, United States
- E-mail: (S.C.W.)
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23
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Concepción R, García P, Medina E, Brenes M. The PDO and PGI Table Olives of Spain. EUR J LIPID SCI TECH 2018. [DOI: 10.1002/ejlt.201800136] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Romero Concepción
- Food Biotechnology Department; Instituto de la Grasa (IG-CSIC); Building 46, Ctra. Utrera km 1 41013 Seville Spain
| | - Pedro García
- Food Biotechnology Department; Instituto de la Grasa (IG-CSIC); Building 46, Ctra. Utrera km 1 41013 Seville Spain
| | - Eduardo Medina
- Food Biotechnology Department; Instituto de la Grasa (IG-CSIC); Building 46, Ctra. Utrera km 1 41013 Seville Spain
| | - Manuel Brenes
- Food Biotechnology Department; Instituto de la Grasa (IG-CSIC); Building 46, Ctra. Utrera km 1 41013 Seville Spain
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24
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Yakhlef W, Arhab R, Romero C, Brenes M, de Castro A, Medina E. Phenolic composition and antimicrobial activity of Algerian olive products and by-products. Lebensm Wiss Technol 2018. [DOI: 10.1016/j.lwt.2018.03.044] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Rallo P, Morales‐Sillero A, Brenes M, del Rocio Jiménez M, Sánchez AH, Suarez MP, Casanova L, Romero C. Elaboration of Table Olives: Assessment of New Olive Genotypes. EUR J LIPID SCI TECH 2018. [DOI: 10.1002/ejlt.201800008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Pilar Rallo
- Departamento de Ciencias Agroforestales, Universidad de SevillaCtra. de Utrera, km. 1‐ 41013SevilleSpain
| | - Ana Morales‐Sillero
- Departamento de Ciencias Agroforestales, Universidad de SevillaCtra. de Utrera, km. 1‐ 41013SevilleSpain
| | - Manuel Brenes
- Food Biotechnology Department, Instituto de la Grasa (IG‐CSIC)Building 46‐Ctra. de Utrera, km. 1‐ 41013SevilleSpain
| | - María del Rocio Jiménez
- Departamento de Ciencias Agroforestales, Universidad de SevillaCtra. de Utrera, km. 1‐ 41013SevilleSpain
| | - Antonio H. Sánchez
- Food Biotechnology Department, Instituto de la Grasa (IG‐CSIC)Building 46‐Ctra. de Utrera, km. 1‐ 41013SevilleSpain
| | - Maria Paz Suarez
- Departamento de Ciencias Agroforestales, Universidad de SevillaCtra. de Utrera, km. 1‐ 41013SevilleSpain
| | - Laura Casanova
- Departamento de Ciencias Agroforestales, Universidad de SevillaCtra. de Utrera, km. 1‐ 41013SevilleSpain
| | - Concepción Romero
- Food Biotechnology Department, Instituto de la Grasa (IG‐CSIC)Building 46‐Ctra. de Utrera, km. 1‐ 41013SevilleSpain
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26
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Campus M, Değirmencioğlu N, Comunian R. Technologies and Trends to Improve Table Olive Quality and Safety. Front Microbiol 2018; 9:617. [PMID: 29670593 PMCID: PMC5894437 DOI: 10.3389/fmicb.2018.00617] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Accepted: 03/16/2018] [Indexed: 12/17/2022] Open
Abstract
Table olives are the most widely consumed fermented food in the Mediterranean countries. Peculiar processing technologies are used to process olives, which are aimed at the debittering of the fruits and improvement of their sensory characteristics, ensuring safety of consumption at the same time. Processors demand for novel techniques to improve industrial performances, while consumers' attention for natural and healthy foods has increased in recent years. From field to table, new techniques have been developed to decrease microbial load of potential spoilage microorganisms, improve fermentation kinetics and ensure safety of consumption of the packed products. This review article depicts current technologies and recent advances in the processing technology of table olives. Attention has been paid on pre processing technologies, some of which are still under-researched, expecially physical techniques, such ad ionizing radiations, ultrasounds and electrolyzed water solutions, which are interesting also to ensure pesticide decontamination. The selections and use of starter cultures have been extensively reviewed, particularly the characterization of Lactic Acid Bacteria and Yeasts to fasten and safely drive the fermentation process. The selection and use of probiotic strains to address the request for functional foods has been reported, along with salt reduction strategies to address health concerns, associated with table olives consumption. In this respect, probiotics enriched table olives and strategies to reduce sodium intake are the main topics discussed. New processing technologies and post packaging interventions to extend the shelf life are illustrated, and main findings in modified atmosphere packaging, high pressure processing and biopreservaton applied to table olive, are reported and discussed.
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Affiliation(s)
- Marco Campus
- Agris Sardegna, Agricultural Research Agency of Sardinia, Sassari, Italy
| | - Nurcan Değirmencioğlu
- Department of Food Processing, Bandirma Vocational High School, Bandirma Onyedi Eylül University, Bandirma, Turkey
| | - Roberta Comunian
- Agris Sardegna, Agricultural Research Agency of Sardinia, Sassari, Italy
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27
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García P, Romero C, Brenes M. Bioactive substances in black ripe olives produced in Spain and the USA. J Food Compost Anal 2018. [DOI: 10.1016/j.jfca.2017.12.022] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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28
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Medina E, Romero C, Brenes M. Residual Olive Paste as a Source of Phenolic Compounds and Triterpenic Acids. EUR J LIPID SCI TECH 2018. [DOI: 10.1002/ejlt.201700368] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Eduardo Medina
- Food Biotechnology Department; Instituto de la Grasa (IG-CSIC); Building 46, Ctra. Utrera km 1 41013-Seville Spain
| | - Concepción Romero
- Food Biotechnology Department; Instituto de la Grasa (IG-CSIC); Building 46, Ctra. Utrera km 1 41013-Seville Spain
| | - Manuel Brenes
- Food Biotechnology Department; Instituto de la Grasa (IG-CSIC); Building 46, Ctra. Utrera km 1 41013-Seville Spain
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29
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Romero C, Medina E, Mateo MA, Brenes M. New by-products rich in bioactive substances from the olive oil mill processing. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2018; 98:225-230. [PMID: 28580634 DOI: 10.1002/jsfa.8460] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Revised: 05/24/2017] [Accepted: 05/28/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Olive oil extraction generates a large amount of residue consisting mainly of the pomace and leaves when using a two-phase centrifugation system. The aim of this study was to assess the content of phenolic and triterpene compounds in the by-products produced in Spanish olive oil mills. RESULTS Olive pomace had concentrations of phenolic and triterpene substances lower than 2 and 3 g kg-1 , respectively. The leaves contained a high concentration of these substances, although those collected from ground-picked olives had lost most of their phenolic compounds. Moreover, the sediment from the bottom of the olive oil storage tanks did not have a significant amount of these substances. By contrast, a new by-product called olive pomace skin has been revealed as a very rich source of triterpenic acids, the content of which can reach up to 120 g kg-1 in this waste product, maslinic acid comprising around 70% of total triterpenics. CONCLUSION Among the by-products generated during extraction of olive oil, olive pomace skin has been discovered to be a very rich source of triterpenic acids, which can reach up to 120 g kg-1 of the waste. These results will contribute to the valorization of olive oil by-products. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Concepción Romero
- Food Biotechnology Department, Instituto de la Grasa (IG-CSIC), Campus University Pablo de Olavide, Seville, Spain
| | - Eduardo Medina
- Food Biotechnology Department, Instituto de la Grasa (IG-CSIC), Campus University Pablo de Olavide, Seville, Spain
| | | | - Manuel Brenes
- Food Biotechnology Department, Instituto de la Grasa (IG-CSIC), Campus University Pablo de Olavide, Seville, Spain
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Cavaca LAS, Afonso CAM. Oleuropein: A Valuable Bio-Renewable Synthetic Building Block. European J Org Chem 2017. [DOI: 10.1002/ejoc.201701136] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Lídia A. S. Cavaca
- Research Institute for Medicines (iMed.ULisboa); Faculty of Pharmacy; Universidade de Lisboa; Av. Prof. Gama Pinto 1649-003 Lisboa Portugal
| | - Carlos A. M. Afonso
- Research Institute for Medicines (iMed.ULisboa); Faculty of Pharmacy; Universidade de Lisboa; Av. Prof. Gama Pinto 1649-003 Lisboa Portugal
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Rodríguez-Gómez F, Ruiz-Bellido MÁ, Romero-Gil V, Benítez-Cabello A, Garrido-Fernández A, Arroyo-López FN. Microbiological and Physicochemical Changes in Natural Green Heat-Shocked Aloreña de Málaga Table Olives. Front Microbiol 2017; 8:2209. [PMID: 29167665 PMCID: PMC5682407 DOI: 10.3389/fmicb.2017.02209] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Accepted: 10/26/2017] [Indexed: 11/29/2022] Open
Abstract
Preserving the highly appreciated natural freshness of Aloreña de Málaga table olives and preventing their progressive darkening during processing is a major challenge. In this work, heat-shocked (60°C, 5 min) fruits were processed according to the three denominations referred to in the Protected Designation of Origen (cured, fresh green, and traditional) and their characteristics compared with those that followed the habitual industrial process (controls). The results revealed that the effects of the heat treatment on the evolution of pH, titratable acidity, salt, sugar, organic acid, ethanol content, texture, and color of fruits as well as on microbial populations (yeasts and lactic acid bacteria) were slight in the case of the fresh green and cured presentations. However, the differences between heat-shocked and its control were remarkable in the traditional process. Notably, the heat treatment favored lactic acid fermentation, retention of the green appearance of the fruits, stability during packaging, and led to the highest sensory evaluation. The metagenomic analysis carried out at the end of the fermentation revealed the presence in all samples of three genera (Lactobacillus, Pediococcus, and Celerinatantimonas) which encompassed most of the sequences. The number of Lactobacillus sequences was statistically higher (p ≥ 0.05) in the case of traditional heat-shocked fruits than in its control.
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Affiliation(s)
- Francisco Rodríguez-Gómez
- Department of Food Biotechnology, Instituto de la Grasa (IG-CSIC), Universidad Pablo de Olavide, Seville, Spain
| | | | - Verónica Romero-Gil
- Department of Food Biotechnology, Instituto de la Grasa (IG-CSIC), Universidad Pablo de Olavide, Seville, Spain.,Regulatory Council of PDO Aloreña de Málaga Table Olives, Málaga, Spain
| | - Antonio Benítez-Cabello
- Department of Food Biotechnology, Instituto de la Grasa (IG-CSIC), Universidad Pablo de Olavide, Seville, Spain
| | - Antonio Garrido-Fernández
- Department of Food Biotechnology, Instituto de la Grasa (IG-CSIC), Universidad Pablo de Olavide, Seville, Spain
| | - Francisco N Arroyo-López
- Department of Food Biotechnology, Instituto de la Grasa (IG-CSIC), Universidad Pablo de Olavide, Seville, Spain
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Brenes M, Romero C, García-García P. Optimization of Ripe Olive Processing with a Single Lye Treatment. J Food Sci 2017; 82:2078-2084. [DOI: 10.1111/1750-3841.13827] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Revised: 06/19/2017] [Accepted: 07/01/2017] [Indexed: 12/01/2022]
Affiliation(s)
- Manuel Brenes
- the Food Biotechnology Dept., Inst. de la Grasa (IG-CSIC); Univ. Pablo de Olavide Campus; Building 46, Ctra. Utrera km 1 41013 Seville Spain
| | - Concepción Romero
- the Food Biotechnology Dept., Inst. de la Grasa (IG-CSIC); Univ. Pablo de Olavide Campus; Building 46, Ctra. Utrera km 1 41013 Seville Spain
| | - Pedro García-García
- the Food Biotechnology Dept., Inst. de la Grasa (IG-CSIC); Univ. Pablo de Olavide Campus; Building 46, Ctra. Utrera km 1 41013 Seville Spain
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Ramírez E, Brenes M, de Castro A, Romero C, Medina E. Oleuropein hydrolysis by lactic acid bacteria in natural green olives. Lebensm Wiss Technol 2017. [DOI: 10.1016/j.lwt.2016.12.040] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Romero C, Medina E, Mateo MA, Brenes M. Quantification of bioactive compounds in Picual and Arbequina olive leaves and fruit. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2017; 97:1725-1732. [PMID: 27447942 DOI: 10.1002/jsfa.7920] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 07/07/2016] [Accepted: 07/17/2016] [Indexed: 05/24/2023]
Abstract
BACKGROUND Olive leaves and fruit possess bioactive substances such as phenolic compounds and triterpenic acids that can be obtained from olive by-products generated during olive oil extraction. The aim of the present study was the characterization and quantification of these compounds in Picual and Arbequina cultivars from different locations and throughout two seasons in both olive leaves and fruit. RESULTS The major phenolic compound identified in the leaves was oleuropein, and the total content of phenolic compounds in this material reached 70 g kg-1 fresh weight. The leaves were also rich in triterpenic acids (20 g kg-1 fresh weight), with oleanolic acid being the most concentrated among them. With regard to olives, oleuropein and demethyloleuropein were the main phenolic compounds in the pulp of Picual and Arbequina cultivars, and the total concentration of these phenolic compounds reached 3.5% fresh weight. Olives can also be an important source of triterpenic acids, although this is mainly the skin part, where the maslinic and oleanolic acids are concentrated. CONCLUSION Olive leaves can contain up to 70 g kg-1 phenolic compounds and 20 g kg-1 triterpenic acids, and olive fruit can contain up to 35 g kg-1 of the former and 3 g kg-1 of the latter. It must also be noted that this level was constant both between seasons and orchard locations. © 2016 Society of Chemical Industry.
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Affiliation(s)
- Concepción Romero
- Food Biotechnology Department, Instituto de la Grasa (IG-CSIC), Campus University Pablo de Olavide, Ctra. Utrera km 1, 41013, Seville, Spain
| | - Eduardo Medina
- Food Biotechnology Department, Instituto de la Grasa (IG-CSIC), Campus University Pablo de Olavide, Ctra. Utrera km 1, 41013, Seville, Spain
| | - Mª Antonia Mateo
- Jaencoop SCA, Avda. de Valencia s/n, 23330-Villanueva del Arzobispo, Jaén, Spain
| | - Manuel Brenes
- Food Biotechnology Department, Instituto de la Grasa (IG-CSIC), Campus University Pablo de Olavide, Ctra. Utrera km 1, 41013, Seville, Spain
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Susamci E, Romero C, Tuncay O, Brenes M. An explanation for the natural de-bittering of Hurma olives during ripening on the tree. GRASAS Y ACEITES 2017. [DOI: 10.3989/gya.1161162] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Harvested olives require further processing to make them edible due to their content in the bitter substance oleuropein. However, some olives of the Erkence cultivar naturally de-bitter on the tree giving rise to the so-called Hurma olives. In this study, the evolution of the chemical characteristics of Erkence and Hurma olives harvested from the northeast and southwest area of trees located in the Karaburun Peninsula was assayed. It was confirmed that the oleuropein content in Hurma olives was much lower (< 2000 mg/kg fresh weight) than Erkence, which reached 35.000 mg/kg fresh weight at the beginning of the season. In addition, no free or polymerized anthocyanins were found in Hurma fruit in contrast to ripened Erkence fruit. The concentration of glucose was also lower in Hurma than Erkence olives. These results suggest that the enzymatic oxidation of oleuropein could be responsible for the natural de-bittering of Hurma olives during their ripening on the tree.
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Romero C, García-García P, Brenes M. Enrichment of Black Ripe Olives in Bioactive Compounds Using a Single Alkali Treatment. J Food Sci 2016; 81:C2686-C2691. [DOI: 10.1111/1750-3841.13530] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 09/08/2016] [Accepted: 09/14/2016] [Indexed: 11/28/2022]
Affiliation(s)
- Concepción Romero
- Food Biotechnology Dept., Inst. de la Grasa (IG-CSIC); Campus Univ. Pablo de Olavide; Building 46, Ctra. Utrera km 1 41013 Sevilla Spain
| | - Pedro García-García
- Food Biotechnology Dept., Inst. de la Grasa (IG-CSIC); Campus Univ. Pablo de Olavide; Building 46, Ctra. Utrera km 1 41013 Sevilla Spain
| | - Manuel Brenes
- Food Biotechnology Dept., Inst. de la Grasa (IG-CSIC); Campus Univ. Pablo de Olavide; Building 46, Ctra. Utrera km 1 41013 Sevilla Spain
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Hachicha Hbaieb R, Kotti F, Vichi S, Gargouri M. Evolution of endogenous enzyme activities and virgin olive oil characteristics during Chétoui and Chemlali olive ripening. EUR J LIPID SCI TECH 2016. [DOI: 10.1002/ejlt.201600150] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- Rim Hachicha Hbaieb
- Biocatalysis and Industrial Enzymes Group, Laboratory of Microbial Ecology and Technology, Carthage UniversityNational Institute of Applied Sciences and Technology (INSAT)TunisTunisia
| | - Faten Kotti
- Biocatalysis and Industrial Enzymes Group, Laboratory of Microbial Ecology and Technology, Carthage UniversityNational Institute of Applied Sciences and Technology (INSAT)TunisTunisia
| | - Stefania Vichi
- Department of Nutrition, Food Science and Gastronomy, INSA‐UB, XaRTA (Catalonian Reference Network on Food Technology), University of BarcelonaFood and Nutrition Torribera CampusBarcelonaSpain
| | - Mohamed Gargouri
- Biocatalysis and Industrial Enzymes Group, Laboratory of Microbial Ecology and Technology, Carthage UniversityNational Institute of Applied Sciences and Technology (INSAT)TunisTunisia
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Ramírez E, Brenes M, García P, Medina E, Romero C. Oleuropein hydrolysis in natural green olives: Importance of the endogenous enzymes. Food Chem 2016; 206:204-9. [DOI: 10.1016/j.foodchem.2016.03.061] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 03/11/2016] [Accepted: 03/17/2016] [Indexed: 12/01/2022]
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Sánchez AH, Romero C, de Castro A, Rejano L, Brenes M. Assays to control the development of the green staining alteration in Spanish-style green olives of the Gordal variety. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2016; 96:4032-4036. [PMID: 26700060 DOI: 10.1002/jsfa.7598] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Revised: 12/03/2015] [Accepted: 12/17/2015] [Indexed: 06/05/2023]
Abstract
BACKGROUND Olives of the Gordal variety processed according to the Spanish style sometimes develop an alteration in color known as green staining (GS), due to the formation of harmless copper-chlorophyll complexes, which makes the product less valuable. The aim of this study was to investigate methods to minimize the impact that this alteration has for the table olive industry. RESULTS Calcium chloride, sorbic, benzoic and ascorbic acids and SO2 did not inhibit the development of the alteration in olives packed under their own fermentation brine or new fresh brine. It was also discovered that the incubation of olive samples at 45 °C for 20 days accelerates the formation of GS and can be a very useful tool to predict the incidence of the alteration in advance. By applying this test to numerous industrial tanks for four consecutive seasons, it was found that GS was mainly present in olives harvested at the beginning of the season. CONCLUSION The formation of GS in olives of the Gordal variety is time- and temperature-dependent, and none of the additives tested avoided or retarded the development of the alteration. However, an accelerated test to predict the development of GS formation has been proposed that could contribute to minimize the effects of the alteration. © 2015 Society of Chemical Industry.
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Affiliation(s)
- Antonio Higinio Sánchez
- Food Biotechnology Department, Instituto de la Grasa (IG-CSIC), Campus University Pablo de Olavide, Building 46, Ctra. Utrera km 1, E-41013, Seville, Spain
| | - Concepción Romero
- Food Biotechnology Department, Instituto de la Grasa (IG-CSIC), Campus University Pablo de Olavide, Building 46, Ctra. Utrera km 1, E-41013, Seville, Spain
| | - Antonio de Castro
- Food Biotechnology Department, Instituto de la Grasa (IG-CSIC), Campus University Pablo de Olavide, Building 46, Ctra. Utrera km 1, E-41013, Seville, Spain
| | - Luis Rejano
- Food Biotechnology Department, Instituto de la Grasa (IG-CSIC), Campus University Pablo de Olavide, Building 46, Ctra. Utrera km 1, E-41013, Seville, Spain
| | - Manuel Brenes
- Food Biotechnology Department, Instituto de la Grasa (IG-CSIC), Campus University Pablo de Olavide, Building 46, Ctra. Utrera km 1, E-41013, Seville, Spain
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Boss A, Bishop KS, Marlow G, Barnett MPG, Ferguson LR. Evidence to Support the Anti-Cancer Effect of Olive Leaf Extract and Future Directions. Nutrients 2016; 8:nu8080513. [PMID: 27548217 PMCID: PMC4997426 DOI: 10.3390/nu8080513] [Citation(s) in RCA: 97] [Impact Index Per Article: 12.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 08/12/2016] [Accepted: 08/16/2016] [Indexed: 12/28/2022] Open
Abstract
The traditional Mediterranean diet (MD) is associated with long life and lower prevalence of cardiovascular disease and cancers. The main components of this diet include high intake of fruit, vegetables, red wine, extra virgin olive oil (EVOO) and fish, low intake of dairy and red meat. Olive oil has gained support as a key effector of health benefits and there is evidence that this relates to the polyphenol content. Olive leaf extract (OLE) contains a higher quantity and variety of polyphenols than those found in EVOO. There are also important structural differences between polyphenols from olive leaf and those from olive fruit that may improve the capacity of OLE to enhance health outcomes. Olive polyphenols have been claimed to play an important protective role in cancer and other inflammation-related diseases. Both inflammatory and cancer cell models have shown that olive leaf polyphenols are anti-inflammatory and protect against DNA damage initiated by free radicals. The various bioactive properties of olive leaf polyphenols are a plausible explanation for the inhibition of progression and development of cancers. The pathways and signaling cascades manipulated include the NF-κB inflammatory response and the oxidative stress response, but the effects of these bioactive components may also result from their action as a phytoestrogen. Due to the similar structure of the olive polyphenols to oestrogens, these have been hypothesized to interact with oestrogen receptors, thereby reducing the prevalence and progression of hormone related cancers. Evidence for the protective effect of olive polyphenols for cancer in humans remains anecdotal and clinical trials are required to substantiate these claims idea. This review aims to amalgamate the current literature regarding bioavailability and mechanisms involved in the potential anti-cancer action of olive leaf polyphenols.
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Affiliation(s)
- Anna Boss
- Discipline of Nutrition, FM & HS, University of Auckland Medical School, Private Bag 92019, Auckland 1142, New Zealand.
| | - Karen S Bishop
- Auckland Cancer Society Research Centre, FM & HS, University of Auckland Medical School, Private Bag 92019, Auckland 1142, New Zealand.
| | - Gareth Marlow
- Discipline of Nutrition, FM & HS, University of Auckland Medical School, Private Bag 92019, Auckland 1142, New Zealand.
| | - Matthew P G Barnett
- Food Nutrition & Health Team, Food & Bio-based Products Group, AgResearch Limited, Grasslands Research Centre, Tennent Drive, Palmerston North 4442, New Zealand.
| | - Lynnette R Ferguson
- Discipline of Nutrition, FM & HS, University of Auckland Medical School, Private Bag 92019, Auckland 1142, New Zealand.
- Auckland Cancer Society Research Centre, FM & HS, University of Auckland Medical School, Private Bag 92019, Auckland 1142, New Zealand.
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Technological Potential of Lactobacillus Strains Isolated from Fermented Green Olives: In Vitro Studies with Emphasis on Oleuropein-Degrading Capability. ScientificWorldJournal 2016; 2016:1917592. [PMID: 27446986 PMCID: PMC4944063 DOI: 10.1155/2016/1917592] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2016] [Revised: 05/13/2016] [Accepted: 06/01/2016] [Indexed: 11/29/2022] Open
Abstract
Technological properties of two strains of Lactobacillus plantarum (B3 and B11) and one of Lactobacillus pentosus (B4), previously isolated from natural fermented green olives, have been studied in vitro. Acidifying ability, salt, temperature, and pH tolerances of all strains were found in the range reported for similar strains produced in Italy and optimal growth conditions were found to be 6.0–8.0 pH, 15–30°C temperature, and less than 6% NaCl. Moreover, all strains showed very good tolerance to common olive phenol content (0.3% total phenol) and high oleuropein-degrading capability. It was found that medium composition affected the bacterial oleuropein degradation. B11 strain grown in a nutrient-rich medium showed a lower oleuropein-degrading action than when it was cultivated in nutrient-poor medium. Furthermore, enzymatic activity assays revealed that oleuropein depletion did not correspond to an increase of hydroxytyrosol, evidencing that bacterial strains could efficiently degrade oleuropein via a mechanism different from hydrolysis.
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Ramírez E, García P, Brenes M, Romero C. Evaluation of chemical components of debittered olives undergone preservation and polyphenol oxidation. Int J Food Sci Technol 2016. [DOI: 10.1111/ijfs.13139] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Eva Ramírez
- Food Biotechnology Department; Instituto de la Grasa (IG-CSIC); Campus University Pablo de Olavide; Ctra. Utrera km 1 Seville 41013 Spain
| | - Pedro García
- Food Biotechnology Department; Instituto de la Grasa (IG-CSIC); Campus University Pablo de Olavide; Ctra. Utrera km 1 Seville 41013 Spain
| | - Manuel Brenes
- Food Biotechnology Department; Instituto de la Grasa (IG-CSIC); Campus University Pablo de Olavide; Ctra. Utrera km 1 Seville 41013 Spain
| | - Concepción Romero
- Food Biotechnology Department; Instituto de la Grasa (IG-CSIC); Campus University Pablo de Olavide; Ctra. Utrera km 1 Seville 41013 Spain
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De Leonardis A, Testa B, Macciola V, Lombardi SJ, Iorizzo M. Exploring enzyme and microbial technology for the preparation of green table olives. Eur Food Res Technol 2015. [DOI: 10.1007/s00217-015-2546-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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