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Nikolaou G, Neocleous D, Manes A, Kitta E. Calibration and validation of solar radiation-based equations to estimate crop evapotranspiration in a semi-arid climate. Int J Biometeorol 2024; 68:1-15. [PMID: 38010417 PMCID: PMC10752917 DOI: 10.1007/s00484-023-02566-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/20/2023] [Revised: 09/19/2023] [Accepted: 10/08/2023] [Indexed: 11/29/2023]
Abstract
The Abtew and Jensen-Haise solar radiation-based equations were used to estimate evapotranspiration, considering the limited climatic data in many locations. Both equations were proven to successfully predict the potential evapotranspiration (ETO) compared with the standard Penman-Monteith (PM) method in two Mediterranean countries. Calibration of the constant coefficient k of the Abtew equation showed substantial differences compared to recommended values (1.22 vs. 0.53), with the highest values observed during September (1.46). Validation of ETO measurements using calibrated Abtew equation against the PM method indicated a high correlation coefficient (r2 = 0.97, RMSE = 0.61). Further, evapotranspiration requirements, using the calibrated empirical equation, were calculated for olives (449 mm) and citrus (807 mm) showing a good agreement with recommended values for dry climate regions. Therefore, the tested equations could be safely used to predict frequencies and doses of irrigation in semi-arid climates, considering limited climatic data availability.
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Affiliation(s)
- Georgios Nikolaou
- Department of Agriculture Crop Production and Rural Environment, School of Agricultural Sciences, University of Thessaly, Fytokou Str., 38446, Volos, Greece.
| | - Damianos Neocleous
- Department of Natural Resources and Environment, Ministry of Agriculture, Agricultural Research Institute, 1516, Nicosia, Cyprus
| | | | - Evangelini Kitta
- Department of Agriculture Crop Production and Rural Environment, School of Agricultural Sciences, University of Thessaly, Fytokou Str., 38446, Volos, Greece
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NAUREEN ZAKIRA, DHULI KRISTJANA, DONATO KEVIN, AQUILANTI BARBARA, VELLUTI VALERIA, MATERA GIUSEPPINA, IACONELLI AMERIGO, BERTELLI MATTEO. Foods of the Mediterranean diet: tomato, olives, chili pepper, wheat flour and wheat germ. J Prev Med Hyg 2022; 63:E4-E11. [PMID: 36479499 PMCID: PMC9710402 DOI: 10.15167/2421-4248/jpmh2022.63.2s3.2740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Mediterranean people, which follows a diet rich in minimally-processed plant-based foods, are believed to live longer and healthier lives than many other populations in the Western world. Epidemiological and clinical data suggest that the Mediterranean diet has beneficial effects for several chronic diseases, such as cardiovascular diseases, obesity, cancer and diabetes. Although the mechanisms of action of the Mediterranean diet are not completely clear, the synergistic effects of a number of its components and their bioactive phytochemicals exert antioxidant, anti-inflammatory, anti-microbial and anti-cancer effects. The Mediterranean diet includes daily consumption of whole cereals, fruit, vegetables and legumes in moderate proportions, weekly consumption of white meat in low to moderate proportions and occasionally sweets and chocolates in small amounts. Since olive oil is the main lipids source, it has special significance for health. Healthy fruit and vegetables, rich in phytochemicals, are a major proportion of this diet and contribute to the overall nutritional value and bioactivity of its components. Here we review the nutritional and health benefits of wheat germ, tomatoes, olives and chili pepper, items at the base of Mediterranean diet food pyramid that provides beneficial molecules, such as polyphenols, vitamins and flavonoids, and exert anti-inflammatory, anti-microbial and anti-oxidative actions.
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Affiliation(s)
| | - KRISTJANA DHULI
- MAGI’s Lab, Rovereto (TN), Italy
- Correspondence: Kristjana Dhuli, MAGI’s Lab, Rovereto (TN), 38068, Italy. E-mail:
| | | | - BARBARA AQUILANTI
- UOSD Medicina Bariatrica, Fondazione Policlinico Agostino Gemelli IRCCS, Rome, Italy
| | - VALERIA VELLUTI
- UOSD Medicina Bariatrica, Fondazione Policlinico Agostino Gemelli IRCCS, Rome, Italy
| | - GIUSEPPINA MATERA
- UOSD Medicina Bariatrica, Fondazione Policlinico Agostino Gemelli IRCCS, Rome, Italy
| | - AMERIGO IACONELLI
- UOSD Medicina Bariatrica, Fondazione Policlinico Agostino Gemelli IRCCS, Rome, Italy
| | - MATTEO BERTELLI
- MAGI Euregio, Bolzano, Italy
- MAGI’s Lab, Rovereto (TN), Italy
- MAGISNAT, Peachtree Corners (GA), USA
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Tariq U, Butt MS, Pasha I, Faisal MN. Prophylactic role of olive fruit extract against cigarette smoke-induced oxidative stress in Sprague-Dawley rats. Cell Stress Chaperones 2022; 27:545-560. [PMID: 35951259 PMCID: PMC9485526 DOI: 10.1007/s12192-022-01291-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Revised: 07/19/2022] [Accepted: 08/01/2022] [Indexed: 11/03/2022] Open
Abstract
Cigarette smoke exposure increases the production of free radicals leading to initiation of several pathological conditions by triggering the oxidative stress and inflammatory cascade. Olive fruit owing to its unique phytochemical composition possesses antioxidant, immune modulatory, and anti-inflammatory potential. Considering the compositional alterations in olive fruits during ripening, the current experimental trail was designed to investigate the prophylactic role of green and black olives against the oxidative stress induced by cigarette smoke exposure in rats. Purposely, rats were divided into five different groups: NC (negative control; normal diet), PC [positive control; normal diet + smoke exposure (SE)], drug (normal diet + SE + citalopram), GO (normal diet + SE + green olive extract), and BO (normal diet + SE + black olive extract). Rats of all groups were exposed to cigarette smoke except "NC" and were sacrificed for collection of blood and organs after 28 days of experimental trial. The percent reduction in total oxidative stress by citalopram and green and black olive extracts in serum was 29.72, 58.69, and 57.97%, respectively, while the total antioxidant capacity increased by 30.78, 53.94, and 43.98%, accordingly in comparison to PC. Moreover, malondialdehyde (MDA) was reduced by 29.63, 42.59, and 45.70% in drug, GO, and BO groups, respectively. Likewise, green and black olive extracts reduced the leakage of hepatic enzymes in sera, alkaline phosphatase (ALP) by 23.44 and 25.80% and 35.62 and 37.61%, alanine transaminase (ALT) by 42.68 and 24.39% and 51.04 and 35.41%, and aspartate transaminase (AST) by 31.51 and 16.07% and 40.50 and 27.09% from PC and drug group, respectively. Additionally, olive extracts also maintained the antioxidant pool, i.e., superoxide dismutase, catalase, and glutathione in serum. Furthermore, histological examination revealed that olive extracts prevented the cigarette smoke-induced necrosis, pyknotic alterations, and congestion in the lung, hepatic, and renal parenchyma. Besides, gene expression analysis revealed that olive extracts and citalopram decreased the brain and lung damage caused by stress-induced upregulation of NRF-2 and MAPK signaling pathways. Hence, it can be concluded that olives (both green and black) can act as promising antioxidant in alleviating the cigarette smoke-induced oxidative stress.
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Affiliation(s)
- Urwa Tariq
- Faculty of Food, Nutrition and Home Sciences, National Institute of Food Science and Technology, University of Agriculture, Faisalabad, Pakistan
- Department of Human Nutrition and Dietetics, Riphah International University, Faisalabad, 38000, Pakistan
| | - Masood Sadiq Butt
- Faculty of Food, Nutrition and Home Sciences, National Institute of Food Science and Technology, University of Agriculture, Faisalabad, Pakistan.
| | - Imran Pasha
- Faculty of Food, Nutrition and Home Sciences, National Institute of Food Science and Technology, University of Agriculture, Faisalabad, Pakistan
| | - Muhammad Naeem Faisal
- Institute of Pharmacy, Physiology and Pharmacology, Faculty of Veterinary Science, University of Agriculture, Faisalabad, Pakistan
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Michailidou S, Petrovits GE, Kyritsi M, Argiriou A. Amplicon metabarcoding data of prokaryotes and eukaryotes present in 'Kalamata' table olives packaged under modified atmosphere. Data Brief 2021; 38:107314. [PMID: 34485644 PMCID: PMC8397911 DOI: 10.1016/j.dib.2021.107314] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 08/18/2021] [Indexed: 11/16/2022] Open
Abstract
Evaluation of food microbiome is of major importance since it accounts for the product's organoleptic characteristics and their nutritional value. In this dataset, microbes present in olive samples (‘Kalamata’ variety) stored under modified atmosphere and throughout different time-points of the shelf life of the product are presented, originated after 16S and 18S rRNA sequencing. The different time-points analyzed were: T0 (immediately after packaging), T6 (six months of storage), T12 (12 months of storage) and T18 (six months after the end of shelf life). Sequencing was performed on a MiSeq platform with the MiSeq Reagent Kit v3 (600 cycles). The raw sequence data used for analysis are available in NCBI under the Sequence Read Archive (SRA), with BioProject ID PRJNA688686. Raw reads were analyzed using the QIIME2 pipeline, clustered into Operational Taxonomic Units (OTU) and aligned against SILVA 132 reference database. OTUs are presented in different taxonomic levels for each time-point. These data present valuable information on the microbial communities of table olives, a dynamic niche that affect the final product quality. The data presented are related to the research article “Insights into the evolution of Greek style table olives microbiome stored under modified atmosphere: biochemical implications on the product quality” [1].
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Affiliation(s)
- Sofia Michailidou
- Institute of Applied Biosciences / CERTH, P.O. Box 60361, Thermi, Thessaloniki 57001, Greece
| | - George Economou Petrovits
- Pelopac S.A., Block 38, NB1A Street, P.O. Box 1298, Thessaloniki Industrial Area, Sindos 57022, Greece
| | - Mary Kyritsi
- Department of Food Science and Nutrition, University of the Aegean, Lemnos 81400, Greece
| | - Anagnostis Argiriou
- Institute of Applied Biosciences / CERTH, P.O. Box 60361, Thermi, Thessaloniki 57001, Greece.,Department of Food Science and Nutrition, University of the Aegean, Lemnos 81400, Greece
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Abstract
BACKGROUND Olive-trees (Olea europaea L.) are the dominant rustic trees cultivated in the Mediterranean agricultural zones. Major and micronutrients play an indispensable role in their plant physiological functions although; the effect of trace elements on metabolic processes has not been sufficiently investigated, especially in olive-trees. METHODS In the current study, we have used X-ray fluorescence (XRF) spectrometry to determine selected major and trace elements (Br, Cu, Fe, K, Mn, P, Rb and Zn) in the main olive cultivar cultivated in Algeria, cv.'Sigoise'. Certified reference materials viz. IAEA-336 (Lichen) and NIST-1646a (Estuarine sediment) were evaluated simultaneously with the soil and plant samples for quality control of the analytical method. RESULTS The results show that Fe and Mn concentrations were superior in leaves than fruits. However large amounts of K, Cu and Rb were accumulated in the olive-fruits. The contents of all chemical elements were above the threshold limits for possible plant nutrient deficiencies, except for P whose concentration was in borderline requirement of olive trees. High values of a translocation factor index were found for K, Cu and Rb (TFs > 4). Principal component analysis (PCA) indicated that K was highly related with olives-fruits, suggesting that the fruit was the principal organ of K storage. Furthermore, dietary element intake through consuming olives was also estimated and compared to recommended daily intakes (RDIs) and daily permissible limits (DPLs). The estimations of chemical element intakes were below the DPLs set by WHO/FAO guidelines for human nutrition. CONCLUSION The present work indicates that the concentrations of macro- and microelements (Cu, Fe, K, Mn and Zn) were above the threshold limits for possible plant deficiencies except for P, and this cultivar can easily accumulate high amount of K in their organs (predominance in olives). These findings will be used to achieve efficient fertilization for O. europaea orchards.
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Affiliation(s)
- Bouzid Nedjimi
- Laboratory of Exploration and Valorization of Steppe Ecosystem, Faculty of Science of Nature and Life, Ziane Achour University of Djelfa, Cité Aîn Chih, P.O. Box 3117, Djelfa, 17000, Algeria.
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Hamdi M, Bejaoui H, Sá-Morais J, Rodrigues P. Ecophysiology of Penicillium expansum and patulin production in synthetic and olive-based media. Fungal Biol 2019; 125:95-102. [PMID: 33518210 DOI: 10.1016/j.funbio.2019.08.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 07/18/2019] [Accepted: 08/13/2019] [Indexed: 10/26/2022]
Abstract
Olives and their derivatives, in particular olive oil, represent one of the most significant agricultural products in the Mediterranean basin. Storage under inadequate conditions poses serious problems concerning fungal contamination, with consequent defects and potential mycotoxin production in olives and olive oils. Penicillium expansum represents one of the most significant postharvest pathogens in several fruits, including olives. Not only it causes blue mold but also is one of the most relevant patulin producing species of the genus Penicillium. The aim of this research was to evaluate the ecophysiological conditions governing growth and PAT production by P. expansum strains previously isolated from Tunisian olives. For this purpose, four P. expansum isolates were tested in a synthetic medium (Czapek Yeast Autolysate, CYA) and in olive-based medium (OM) for their ability to grow and produce PAT under different temperatures (4 °C, 15 °C and 25 °C) for 10 and 20 d. The mycotoxin was analysed by HPLC-UV. Results showed that all isolates were able to grow on tested media at different temperatures. Different PAT production profiles were found, showing that at 25 °C P. expansum isolates were able to produce PAT on CYA and OM medium. At 15 °C the production of PAT was only detected on CYA medium, while no PAT production was detected at 4 °C for the two media.
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Affiliation(s)
- Mohamed Hamdi
- Centro de Investigação de Montanha (CIMO), ESA, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal; Institute Supérieur de Biotechnologie de Monastir, Université de Monastir, Tunisia
| | - Hend Bejaoui
- Institute Supérieur de Biotechnologie de Monastir, Université de Monastir, Tunisia
| | - Jorge Sá-Morais
- Centro de Investigação de Montanha (CIMO), ESA, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
| | - Paula Rodrigues
- Centro de Investigação de Montanha (CIMO), ESA, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal.
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Britton J, Davis R, O'Connor KE. Chemical, physical and biotechnological approaches to the production of the potent antioxidant hydroxytyrosol. Appl Microbiol Biotechnol 2019; 103:5957-5974. [PMID: 31177312 DOI: 10.1007/s00253-019-09914-9] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2019] [Revised: 05/13/2019] [Accepted: 05/15/2019] [Indexed: 12/12/2022]
Abstract
Hydroxytyrosol (HT) is a polyphenol of interest to the food, feed, supplements and pharmaceutical sectors. It is one of the strongest known natural antioxidants and has been shown to confer other benefits such as anti-inflammatory and anti-carcinogenic properties, and it has the potential to act as a cardio- and neuroprotectant. It is known to be one of the compounds responsible for the health benefits of the Mediterranean diet. In nature, HT is found in the olive plant (Olea europaea) as part of the secoiridoid compound oleuropein, in its leaves, fruit, oil and oil production waste products. HT can be extracted from these olive sources, but it can also be produced by chemical synthesis or through the use of microorganisms. This review looks at the production of HT using plant extraction, chemical synthesis and biotechnological approaches.
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Affiliation(s)
- James Britton
- School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - Reeta Davis
- School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin 4, Ireland
| | - Kevin E O'Connor
- School of Biomolecular and Biomedical Science, University College Dublin, Belfield, Dublin 4, Ireland. .,Beacon Bioeconomy Research Centre, University College Dublin, Belfield, Dublin 4, Ireland.
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Kafkaletou M, Tsantili E. The paradox of oleuropein increase in harvested olives (Olea europea L.). J Plant Physiol 2018; 224-225:132-136. [PMID: 29635211 DOI: 10.1016/j.jplph.2018.03.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Revised: 03/27/2018] [Accepted: 03/28/2018] [Indexed: 06/08/2023]
Abstract
Olives are non-climacteric fruit. In a previous article, oleuropein (OE) increased substantially in fresh green olives exposed to 20 °C for 7 d, but the increases were lower in preharvest treated fruit with an ethylene synthesis inhibitor. The present aim was to investigate whether phenolic compounds, including OE, were affected by ethylene treatment in green harvested olives. Postharvest treatments with the ethylene perception inhibitor, 1 -methylcyclopropene (1-MCP) at 1.5 μL L-1 for 12 h, and/or ethylene at 1000 μL L-1 at 20 °C for up to 10 d were applied to fruits of 'Konservolia' cultivar. The results showed that ethylene and/or 1-MCP had similar effects on total phenolics (TP), total antioxidant capacity (TAC) and OE and these results are revealed for the first time in olives. Ethylene had no effect on green loss, but 1-MCP prevented it slightly. In all treated fruit, but not in controls, TP and TAC were increased soon after harvest and remained almost stable throughout exposure, whereas OE increased in controls and all treated at later stages (as confirmed by HPLC-DAD-ESI-MS) independently of degreening. The present experiments could be applied to studies of ethylene perception and transcription related responses in these non- climacteric fruit. In practice, harvested olives do not lose their antioxidant capacity, but the OE elevation in short-stored olives at ambient temperature might have an impact on olive products quality.
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Affiliation(s)
- Mina Kafkaletou
- Laboratory of Pomology, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, Botanikos 118 55, Athens, Greece.
| | - Eleni Tsantili
- Laboratory of Pomology, Department of Crop Science, Agricultural University of Athens, Iera Odos 75, Botanikos 118 55, Athens, Greece.
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Kerimi A, Nyambe-Silavwe H, Pyner A, Oladele E, Gauer JS, Stevens Y, Williamson G. Nutritional implications of olives and sugar: attenuation of post-prandial glucose spikes in healthy volunteers by inhibition of sucrose hydrolysis and glucose transport by oleuropein. Eur J Nutr 2018. [PMID: 29524000 PMCID: PMC6499752 DOI: 10.1007/s00394-018-1662-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Purpose The secoiridoid oleuropein, as found in olives and olive leaves, modulates some biomarkers of diabetes risk in vivo. A possible mechanism may be to attenuate sugar digestion and absorption. Methods We explored the potential of oleuropein, prepared from olive leaves in a water soluble form (OLE), to inhibit digestive enzymes (α-amylase, maltase, sucrase), and lower [14C(U)]-glucose uptake in Xenopus oocytes expressing human GLUT2 and [14C(U)]-glucose transport across differentiated Caco-2 cell monolayers. We conducted 7 separate crossover, controlled, randomised intervention studies on healthy volunteers (double-blinded and placebo-controlled for the OLE supplement) to assess the effect of OLE on post-prandial blood glucose after consumption of bread, glucose or sucrose. Results OLE inhibited intestinal maltase, human sucrase, glucose transport across Caco-2 monolayers, and uptake of glucose by GLUT2 in Xenopus oocytes, but was a weak inhibitor of human α-amylase. OLE, in capsules, in solution or as naturally present in olives, did not affect post-prandial glucose derived from bread, while OLE in solution attenuated post-prandial blood glucose after consumption of 25 g sucrose, but had no effect when consumed with 50 g of sucrose or glucose. Conclusion The combined inhibition of sucrase activity and of glucose transport observed in vitro was sufficient to modify digestion of low doses of sucrose in healthy volunteers. In comparison, the weak inhibition of α-amylase by OLE was not enough to modify blood sugar when consumed with a starch-rich food, suggesting that a threshold potency is required for inhibition of digestive enzymes in order to translate into in vivo effects.
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Affiliation(s)
- Asimina Kerimi
- School of Food Science and Nutrition, University of Leeds, Leeds, LS2 9JT, UK
| | | | - Alison Pyner
- School of Food Science and Nutrition, University of Leeds, Leeds, LS2 9JT, UK
| | - Ebun Oladele
- School of Food Science and Nutrition, University of Leeds, Leeds, LS2 9JT, UK
| | - Julia S Gauer
- School of Food Science and Nutrition, University of Leeds, Leeds, LS2 9JT, UK
| | - Yala Stevens
- BioActor, Oxfordlaan 70, 6229 EV, Maastricht, The Netherlands
| | - Gary Williamson
- School of Food Science and Nutrition, University of Leeds, Leeds, LS2 9JT, UK.
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López-Blanco R, Moreno-González D, Nortes-Méndez R, García-Reyes JF, Molina-Díaz A, Gilbert-López B. Experimental and theoretical determination of pesticide processing factors to model their behavior during virgin olive oil production. Food Chem 2017; 239:9-16. [PMID: 28873651 DOI: 10.1016/j.foodchem.2017.06.086] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2017] [Revised: 05/25/2017] [Accepted: 06/14/2017] [Indexed: 10/19/2022]
Abstract
The purpose of the present work was the experimental evaluation of pesticides transfer to virgin olive oil during the production step and prediction of their processing factors, which could be eventually used for the calculation of maximum residue limits (MRLs) in olive oil from the MRLs set in olives. A laboratory-scale Abencor system was used for the production of olive oil from olives spiked with the 104 pesticides studied, three different chromatographic methods being used for the analysis of raw olives and the obtained olive oil: (i) gas chromatography-tandem mass spectrometry (GC-MS/MS) for GC-amenable pesticides; (ii) hydrophilic interaction liquid chromatography-tandem mass spectrometry (HILIC-MS/MS) for polar pesticides, and; (iii) reversed-phase liquid chromatography-tandem mass spectrometry (UHPLC-MS/MS) for low to medium polarity pesticides. Processing factors experimentally calculated were correlated to their octanol-water partitioning coefficient (logKow), enabling the calculation of the equivalent MRLs in olive oil from the MRLs in olives, considering the percentage of oil extracted (oil yield) and the log Kow of each pesticide.
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Affiliation(s)
- Rafael López-Blanco
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Edif. B-3, 23071 Jaén, Spain
| | - David Moreno-González
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Edif. B-3, 23071 Jaén, Spain
| | - Rocío Nortes-Méndez
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Edif. B-3, 23071 Jaén, Spain
| | - Juan F García-Reyes
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Edif. B-3, 23071 Jaén, Spain
| | - Antonio Molina-Díaz
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Edif. B-3, 23071 Jaén, Spain; Center for Advanced Studies in Olives Grove and Olive Oils (CEAOAO), Science and Technology Park GEOLIT, E-23620 Mengíbar, Jaén, Spain
| | - Bienvenida Gilbert-López
- Analytical Chemistry Research Group, Department of Physical and Analytical Chemistry, University of Jaén, Campus Las Lagunillas, Edif. B-3, 23071 Jaén, Spain.
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11
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Lozano-Mena G, Sánchez-González M, Parra A, Juan ME, Planas JM. Identification of gut-derived metabolites of maslinic acid, a bioactive compound from Olea europaea L. Mol Nutr Food Res 2016; 60:2053-64. [PMID: 27144997 DOI: 10.1002/mnfr.201501060] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2015] [Revised: 02/27/2016] [Accepted: 03/25/2016] [Indexed: 11/11/2022]
Abstract
SCOPE Maslinic acid has been described to exert a chemopreventive activity in colon cancer. Hereby, we determined maslinic acid and its metabolites in the rat intestine previous oral administration as a first step in elucidating whether this triterpene might be used as a nutraceutical. METHODS AND RESULTS Maslinic acid was orally administered at 1, 2, and 5 mg/kg to male Sprague-Dawley for 2 days. At 24 h after the last administration, the content of the duodenum and jejunum, ileum, cecum, and colon was collected and extracted with methanol 80% prior to LC-APCI-MS analysis. The developed method was validated providing suitable sensitivity (LOQ of 5 nM), good recovery (97.8 ± 3.6%), linear correlation, and appropriate precision (< 9%). Maslinic acid was detected in all the segments with higher concentrations in the distal part of the intestine. LC-APCI-LTQ-ORBITRAP-MS allowed the identification of 11 gut-derived metabolites that were formed by mono-, dihydroxylation, and dehydrogenation reactions. CONCLUSION Maslinic acid undergoes phase I reactions resulting in a majority of monohydroxylated metabolites without the presence of phase II derivatives. The high concentration of maslinic acid achieved in the intestine suggests that it could exert a beneficial effect in the prevention of colon cancer.
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Affiliation(s)
- Glòria Lozano-Mena
- Departament de Bioquímica i Fisiologia and Institut de Recerca en Nutrició i Seguretat Alimentària (INSA-UB), Universitat de Barcelona (UB), Barcelona, Spain
| | - Marta Sánchez-González
- Departament de Bioquímica i Fisiologia and Institut de Recerca en Nutrició i Seguretat Alimentària (INSA-UB), Universitat de Barcelona (UB), Barcelona, Spain
| | - Andrés Parra
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Granada, Campus Fuentenueva s/n, Granada, Spain
| | - M Emília Juan
- Departament de Bioquímica i Fisiologia and Institut de Recerca en Nutrició i Seguretat Alimentària (INSA-UB), Universitat de Barcelona (UB), Barcelona, Spain.
| | - Joana M Planas
- Departament de Bioquímica i Fisiologia and Institut de Recerca en Nutrició i Seguretat Alimentària (INSA-UB), Universitat de Barcelona (UB), Barcelona, Spain
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12
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Mínguez-Mosquera MI, Gallardo-Guerrero L. Anomalous Transformation of Chloroplastic Pigments in Gordal Variety Olives during Processing for Table Olives. J Food Prot 1995; 58:1241-1248. [PMID: 31137318 DOI: 10.4315/0362-028x-58.11.1241] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
The results of a qualitative and quantitative study of pigments, carried out during the processing of Gordal variety olives for table use, has provided valuable information on the type, extent, and mechanism of degradation of the chlorophylls and carotenoids present in the fresh fruit. Unexpected results were obtained, since the initial treatment of the fruits with NaOH did not provoke chlorophyllase activity. However, the alkaline pH brought about the oxidation of chlorophylls, giving rise to Mg-phytyl-chlorin e6 and Mg-phytyl-rhodin g7. Subsequently, as a consequence of the acid pH generated in the fermentation medium, these compounds were transformed into the corresponding Mg-free derivatives, phytyl-ch1orin e6 and phytyl-rhodin g7. At the same time, those chlorophylls which initially escaped transformation were converted into their corresponding pheophytins. In addition, small amounts of pyropheophytin a, pheophorbides a and b, and pyropheophorbide a were detected, As far as the carotenoid fraction is concerned, β-carotene and lutein remained unaltered throughout processing, and only those components with molecular structures sensitive to the acid medium were affected. The total balance of pigment material indicated that there was a slow but progressive decrease in the concentration of the chlorophyllic and carotenoid fractions, which indicates that a certain amount of these pigments is degraded into colorless products.
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