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Giotopoulou I, Fotiadou R, Stamatis H, Barkoula NM. Development of Low-Density Polyethylene Films Coated with Phenolic Substances for Prolonged Bioactivity. Polymers (Basel) 2023; 15:4580. [PMID: 38232018 PMCID: PMC10707956 DOI: 10.3390/polym15234580] [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: 10/24/2023] [Revised: 11/23/2023] [Accepted: 11/28/2023] [Indexed: 01/19/2024] Open
Abstract
The current study proposes an efficient coating methodology for the development of low-density polyethylene (LDPE) films with prolonged bioactivity for food packaging applications. Three natural phenolic-based substances were incorporated at optimized concentrations in methyl-cellulose-based solutions and used as coatings on LDPE films. The amount of surfactant/emulsifier was optimized to control the entrapment of the bioactive substances, minimizing the loss of the substances during processing, and offering prolonged bioactivity. As a result, the growth of Escherichia coli was substantially inhibited after interaction with the coated films, while coated films presented excellent antioxidant activities and maintained their mechanical performance after coating. Considerable bioactivity was observed after up to 7 days of storage in sealed bags in the case of carvacrol- and thymol-coated films. Interestingly, films coated with olive-leaf extract maintained a high level of antimicrobial and antioxidant properties, at least for 40 days of storage.
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Affiliation(s)
- Iro Giotopoulou
- Department of Materials Science and Engineering, University of Ioannina, 45110 Ioannina, Greece;
| | - Renia Fotiadou
- Department of Biological Applications and Technology, University of Ioannina, 45110 Ioannina, Greece; (R.F.); (H.S.)
| | - Haralambos Stamatis
- Department of Biological Applications and Technology, University of Ioannina, 45110 Ioannina, Greece; (R.F.); (H.S.)
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Fang R, Jiang H, Lin C, Xia T, Xu S, Chen Q, Xiao G. Characterization and shelf stability of sweetened condensed milk formulated with different sucrose substitutes during storage. Food Chem 2022; 404:134402. [DOI: 10.1016/j.foodchem.2022.134402] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 09/01/2022] [Accepted: 09/22/2022] [Indexed: 10/14/2022]
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3
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Pourghorban S, Yadegarian L, Jalili M, Rashidi L. Comparative Physicochemical, Microbiological, Antioxidant, and Sensory properties of pre- and post-fermented yoghurt enriched with olive leaf and its extract. Food Sci Nutr 2022; 10:751-762. [PMID: 35311175 PMCID: PMC8907753 DOI: 10.1002/fsn3.2704] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Revised: 07/03/2021] [Accepted: 12/07/2021] [Indexed: 11/18/2022] Open
Abstract
This study investigated the comparative effect of yoghurt samples enriched with different concentrations of olive leaf powder (OLP) (0.1, 0.5, 1, and 1.5 mg/ml) and its extract (OLE) (0.5, 1, 3, and 5 mg/ml) on the microbiological, sensory, physicochemical, and antioxidant properties of pre‐ and post‐fermented samples during 21 days of storage. Sensory evaluation showed that concentrations lower than 1.5 and 5 mg/ml of OLP and OLE, respectively, were acceptable. Adding OLP or OLE did not have an influence on yoghurt starter culture bacteria (p > .05). All enriched samples significantly showed higher acidity and lower pH compared with control samples (p < .05). The most important polyphenols were oleuropein (from 0.132 to 0.224 and 0.373 to 0.413 mg/g for 0.5 and 3 mg/ml of OLE, from 0.194 to 0.321 mg/g and 0.413 to 1.280 mg/g for 0.5 and 1 mg/ml of OLP, respectively) and catechin (from 0.369 to 0.382 and 0.461 to 0.477 mg/g for 0.5 and 3 mg/ml of OLE, from 0.386 to 0.405 mg/g and 0.310 to 0.710 mg/g for 0.5 and 1 mg/ml of OLP, respectively) in enriched yoghurts. Adding OLP or OLE increased shelf life, antioxidant activity percentage (AA%), and total phenol content (TPC) of enriched samples (p < .05). During 21 days of storage of all samples, TPC, AA%, and pH decreased and TTA increased.
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Affiliation(s)
- Samira Pourghorban
- Faculty of Marine Science and Technology, Islamic Azad University, Northern Tehran Branch Tehran Iran
| | - Linda Yadegarian
- Faculty of Marine Science and Technology, Islamic Azad University, Northern Tehran Branch Tehran Iran
| | - Maryam Jalili
- Food Technology and Agricultural Products Research Center Standard Research Institute Iranian National Standards Organization (INSO) Karaj Iran
| | - Ladan Rashidi
- Food Technology and Agricultural Products Research Center Standard Research Institute Iranian National Standards Organization (INSO) Karaj Iran
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Jouki M, Jafari S, Jouki A, Khazaei N. Characterization of functional sweetened condensed milk formulated with flavoring and sugar substitute. Food Sci Nutr 2021; 9:5119-5130. [PMID: 34532021 PMCID: PMC8441384 DOI: 10.1002/fsn3.2477] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 06/12/2021] [Accepted: 07/06/2021] [Indexed: 11/11/2022] Open
Abstract
In the present study, the effect of sugar replacement and enrichment with cinnamon extract (CE) on the physicochemical, functional, and organoleptic properties of sweetened condensed milk (SCM) and the production of flavored functional dairy dessert was investigated. The results demonstrated that by adding CE (0.5 and 1%) and fructose sugar (50 and 100% replacement) in the formulation containing maltodextrin, the physicochemical, functional, and organoleptic properties of SCM samples were improved. However, adding fructose and CE at the maximum concentration increased the acidity, particle size, redness (a), yellowness (b) and decreased the lightness (L), viscosity, and sensory scores of the SCM samples (p < .05). Scanning electron microscopy images demonstrated that as the fructose level increased, the number of cavities increased, while the size of the cavities decreased (p < .05). Microstructure analysis also showed that the application of CE increased the density of the structure in the SCM samples. However, the SCM samples formulated with maltodextrin, 0.5% CE, and 50% fructose substitution were identified as optimal samples. Evaluation of the functional properties of SCM formulated with 0.5% CE revealed that the total phenolic content (TPC) and DPPH radical scavenging activity were in the range of 139.21-143.24 mg GAE / g and 50.12%-52.01%, respectively.
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Affiliation(s)
- Mohammad Jouki
- Department of Food Science and TechnologyFaculty of Biological SciencesNorth Tehran BranchIslamic Azad UniversityTehranIran
| | - Somayeh Jafari
- Department of Food Science and TechnologyFaculty of Biological SciencesNorth Tehran BranchIslamic Azad UniversityTehranIran
| | - Ali Jouki
- Department of ChemistryFaculty of ScienceShahid Chamran University of AhvazAhvazIran
| | - Naimeh Khazaei
- Department of Food Science and TechnologyFaculty of Biological SciencesNorth Tehran BranchIslamic Azad UniversityTehranIran
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Difonzo G, Squeo G, Pasqualone A, Summo C, Paradiso VM, Caponio F. The challenge of exploiting polyphenols from olive leaves: addition to foods to improve their shelf-life and nutritional value. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2021; 101:3099-3116. [PMID: 33275783 DOI: 10.1002/jsfa.10986] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 10/18/2020] [Accepted: 12/04/2020] [Indexed: 06/12/2023]
Abstract
Olive leaves represent a waste from the olive oil industry which can be reused as source of polyphenols. The most representative phenolic compound of olive leaves is the secoiridoid oleuropein, followed by verbascoside, apigenin-7-O-glucoside, luteolin-7-O-glucoside, and simple phenols. The attention towards these compounds derives above all from the large number of studies demonstrating their beneficial effect on health, in fact olive leaves have been widely used in folk medicine in the Mediterranean regions. Moreover, the growing demand from consumers to replace the synthetic antioxidants, led researchers to conduct studies on the addition of plant bioactives in foods to improve their shelf-life and/or to obtain functional products. The current study overviews the findings on the addition of polyphenol-rich olive leaf extract (OLE) to foods. In particular, the effect of OLE addition on the antioxidant, microbiological and nutritional properties of different foods is examined. Most studies have highlighted the antioxidant effect of OLE in different food matrices, such as oils, meat, baked goods, vegetables, and dairy products. Furthermore, the antimicrobial activity of OLE has been observed in meat and vegetable foods, highlighting the potential of OLE as a replacer of synthetic preservatives. Finally, several authors studied the effect of OLE addition with the aim of improving the nutritional properties of vegetable products, tea, milk, meat and biscuits. Advantages and drawbacks of the different use of OLE were reported and discussed. © 2020 Society of Chemical Industry.
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Affiliation(s)
- Graziana Difonzo
- Department of Soil, Plant and Food Science (DISSPA), University of Bari Aldo Moro, Bari, Italy
| | - Giacomo Squeo
- Department of Soil, Plant and Food Science (DISSPA), University of Bari Aldo Moro, Bari, Italy
| | - Antonella Pasqualone
- Department of Soil, Plant and Food Science (DISSPA), University of Bari Aldo Moro, Bari, Italy
| | - Carmine Summo
- Department of Soil, Plant and Food Science (DISSPA), University of Bari Aldo Moro, Bari, Italy
| | - Vito M Paradiso
- Department of Biological and Environmental Sciences and Technologies, University of Salento, Lecce, Italy
| | - Francesco Caponio
- Department of Soil, Plant and Food Science (DISSPA), University of Bari Aldo Moro, Bari, Italy
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Ribeiro TB, Bonifácio-Lopes T, Morais P, Miranda A, Nunes J, Vicente AA, Pintado M. Incorporation of olive pomace ingredients into yoghurts as a source of fibre and hydroxytyrosol: Antioxidant activity and stability throughout gastrointestinal digestion. J FOOD ENG 2021. [DOI: 10.1016/j.jfoodeng.2021.110476] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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Quality Characteristics and Antioxidant Activity of Yogurt Containing Raw Omija and Sugared Omija during Storage. J CHEM-NY 2020. [DOI: 10.1155/2020/1274591] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
This study was conducted to determine the quality characteristics and antioxidant properties of yogurt containing omija extract (control, raw omija, and sugared omija) stored at 4°C for 14 days. The pH of all groups decreased, while the titratable acidity increased as the storage period increased. The viscosity of the sugared omija sample was high, while in the syneresis test, the sugared omija sample showed a low value. The total polyphenol content was the highest in the raw omija sample on day 0. DPPH activity was the highest in the raw omija sample for all storage periods; this sample also showed high Fe2+ chelating activity, which did not significantly differ from the sugared omija sample. In sensory evaluation, the sugared omija sample showed the highest overall score. Based on these results, it can be concluded that yogurt containing sugared omija shows improved quality and antioxidant activity.
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Evolution of VOC and Sensory Characteristics of Stracciatella Cheese as Affected by Different Preservatives. Foods 2020; 9:foods9101446. [PMID: 33053809 PMCID: PMC7601598 DOI: 10.3390/foods9101446] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 10/05/2020] [Accepted: 10/09/2020] [Indexed: 01/21/2023] Open
Abstract
Undesired volatile organic compounds (VOCs) can negatively affect the flavor of fresh food products; especially those characterized by a mild and delicate aroma. Finding connections between chemical and sensory analyses is a useful way to better understand the arising of off-flavors. A study was conducted on stracciatella; a traditional Italian cream cheese that is emerging on international markets. Samples were prepared by adding two different preservatives (alone or combined): sorbic acid and an olive leaf extract. Their influence on flavor preservation during refrigerated storage was investigated by chemical, microbiological and sensory analyses. A strong change of the VOC profile was ascertained after 8 days in the control cheese and in the sample added with leaf extract alone. The samples containing sorbic acid, alone or in combination with leaf extract, gave the best chemical and sensory results, demonstrating a significant shelf-life extension. In particular, these samples had lower concentrations of undesired metabolites, such as organic acids and volatiles responsible for off-flavor, and received better scores for odor and taste. Ex and Ex-So samples had significantly higher antioxidant activity than Ctr and So throughout the entire storage period, and the color parameter shows no differences among samples taken on the same day. The use of the olive leaf extract, at the concentration tested, seemed to be interesting only in the presence of sorbic acid due to possible synergic effect that mainly acted against Enterobacteriaceae.
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Akkoyun Y, Arslan S. The impact of quinoa flour on some properties of ayran. Food Sci Nutr 2020; 8:5410-5418. [PMID: 33133543 PMCID: PMC7590309 DOI: 10.1002/fsn3.1832] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Revised: 07/26/2020] [Accepted: 07/28/2020] [Indexed: 11/21/2022] Open
Abstract
In this study, some physical, chemical, microbiological, and sensory properties of ayran produced from quinoa flour addition at different ratios (0.1, 0.2, 0.3, and 0.4%, w/v) were investigated. The effect of quinoa addition and storage time on pH, titration acidity, serum separation, L values and microorganism counts were statistically significant (p < .05). The counts of Streptococcus salivarus subsp. thermophilus and Lactobacillus delbruecki subps. bulgaricus had a wide range between 7.13 and 7.52 log CFU/mL and 3.62 and 3.98 log CFU/mlL At the end of the storage, the general appreciation score of the sample containing 0.2% quinoa flour was found to be higher than the other samples.
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Affiliation(s)
- Yüsra Akkoyun
- Engineering FacultyFood Engineering DepartmentPamukkale UniversityDenizliTurkey
| | - Seher Arslan
- Engineering FacultyFood Engineering DepartmentPamukkale UniversityDenizliTurkey
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Kim DH, Cho WY, Yeon SJ, Choi SH, Lee CH. Effects of Lotus ( Nelumbo nucifera) Leaf on Quality and Antioxidant Activity of Yogurt during Refrigerated Storage. Food Sci Anim Resour 2019; 39:792-803. [PMID: 31728448 PMCID: PMC6837900 DOI: 10.5851/kosfa.2019.e69] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 08/28/2019] [Accepted: 10/04/2019] [Indexed: 12/19/2022] Open
Abstract
The supplementation with natural ingredients that are rich in polyphenols could improve the quality and functionality of yogurt. Lotus leaf (LL) are abundant in phenolic compounds. We aimed to investigate the effects of LL powder on the quality properties, total phenolic content (TPC), and antioxidant activity of yogurt. Yogurt was supplemented with four different concentrations (0%, 0.2%, 0.5%, and 1%) of LL powder and evaluated for 14 d refrigerated storage. During storage, the titratable acidity (TA) of all LL yogurt groups was higher than that of the control (p<0.05). The L* and a* values decreased by LL addition to the yogurts, while the b* values increased. All LL yogurt groups indicated better viscosity than that of control, and among them, 0.2% LL yogurts had the highest viscosity without significant decrease until the end of the storage duration. The addition of LL into yogurt enhanced the water-holding capacity (WHC) by at least 1.5-fold than that of control for the entire storage duration. The TPC of yogurts gradually increased with the addition of LL (p<0.05) and continued to increase during storage; the 1% LL yogurt at 14 d showed the highest value of 61.94±1.68 μg GAE/g. The DPPH (2,2-diphenyl-1-picrylhydrazyl) radical scavenging activity and reducing power of the yogurts were also significantly enhanced with increasing LL concentrations (p<0.05). These results suggest that lotus leaf may be useful as a natural ingredient for improving the quality and antioxidant activity of yogurt.
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Affiliation(s)
- Da-Hee Kim
- Department of Food Science and
Biotechnology of Animal Resources, Konkuk University,
Seoul 05029, Korea
| | - Won-Young Cho
- Department of Food Science and
Biotechnology of Animal Resources, Konkuk University,
Seoul 05029, Korea
| | - Su-Jung Yeon
- Department of Food Science and
Biotechnology of Animal Resources, Konkuk University,
Seoul 05029, Korea
| | - Sung-Hee Choi
- Division of Food Technology and Aquatic
Life Medical Sciences, Sunmoon University, Chungnam
31460, Korea
| | - Chi-Ho Lee
- Department of Food Science and
Biotechnology of Animal Resources, Konkuk University,
Seoul 05029, Korea
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Establishing the Phenolic Composition of Olea europaea L. Leaves from Cultivars Grown in Morocco as a Crucial Step Towards Their Subsequent Exploitation. Molecules 2018; 23:molecules23102524. [PMID: 30279368 PMCID: PMC6222472 DOI: 10.3390/molecules23102524] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 09/25/2018] [Accepted: 09/27/2018] [Indexed: 11/29/2022] Open
Abstract
In Morocco, the recovery of olive agro-industrial by-products as potential sources of high-added value substances has been underestimated so far. A comprehensive quantitative characterization of olive leaves’ bioactive compounds is crucial for any attempt to change this situation and to implement the valorization concept in emerging countries. Thus, the phenolic fraction of olive leaves of 11 varieties (‘Arbequina’, ‘Hojiblanca’, ‘Frantoio’, ‘Koroneiki’, ‘Lechín’, ‘Lucque’, ‘Manzanilla’, ‘Picholine de Languedoc’, ‘Picholine Marocaine’, ‘Picual’ and ‘Verdal’), cultivated in the Moroccan Meknès region, was investigated. Thirty eight phenolic or related compounds (including 16 secoiridoids, nine flavonoids in their aglycone form, seven flavonoids in glycosylated form, four simple phenols, one phenolic acid and one lignan) were determined in a total of 55 samples by using ultrasonic-assisted extraction and liquid chromatography coupled to electrospray ionization-ion trap mass spectrometry (LC-ESI-IT MS). Very remarkable quantitative differences were observed among the profiles of the studied cultivars. ‘Picholine Marocaine’ variety exhibited the highest total phenolic content (around 44 g/kg dry weight (DW)), and logically showed the highest concentration in terms of various individual compounds. In addition, chemometrics (principal components analysis (PCA) and stepwise-linear discriminant analysis (s-LDA)) were applied to the quantitative phenolic compound data, allowing good discrimination of the selected samples according to their varietal origin.
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