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Bains A, Sridhar K, Singh BN, Kuhad RC, Chawla P, Sharma M. Valorization of onion peel waste: From trash to treasure. CHEMOSPHERE 2023; 343:140178. [PMID: 37714483 DOI: 10.1016/j.chemosphere.2023.140178] [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: 03/19/2023] [Revised: 08/22/2023] [Accepted: 09/12/2023] [Indexed: 09/17/2023]
Abstract
Globally, fruits and vegetables are consumed as raw, processed, or as an additive, accounting for approximately 50% of total food wastage. Among the fruits and vegetables, onion is well known for its potential bioactive components; however, peels of onion are a major concern for the environmental health and food industries. Effective utilization methods for valorizing the onion peel should be needed to develop value-added products, which are more eco-friendly, cost-effective, and sustainable. Therefore, this review attempts to emphasize the conventional and emerging valorization techniques for onion peel waste to generate value-added products. Several vital applications including anticancerous, antiobesity, antimicrobial, and anti-inflammatory activities are thoroughly discussed. The findings showed that the use of advanced technologies like ultrasound-assisted extraction, microwave-assisted extraction, and enzymatic extraction, demonstrated improved extraction efficiency and higher yield of bioactive compounds, which showed the anticancerous, antiobesity, antimicrobial, and anti-inflammatory properties. However, in-depth studies are recommended to elucidate the mechanisms of action and potential synergistic effects of the bioactive compounds derived from onion peel waste, and to promote the sustainable utilization of onion peel waste in the long-term.
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Affiliation(s)
- Aarti Bains
- Department of Microbiology, Lovely Professional University, Phagwara, 144411, Punjab, India
| | - Kandi Sridhar
- Department of Food Technology, Karpagam Academy of Higher Education (Deemed to be University), Coimbatore, 641021, India
| | - Brahma Nand Singh
- Pharmacology Division, CSIR-National Botanical Research Institute, Lucknow, 226001, Uttar Pradesh, India
| | - Ramesh Chander Kuhad
- Sharda School of Basic Sciences and Research, Sharda University, Greater Noida - 201310, Uttar Pradesh, India; DPG Institute of Management and Technology, Sector-34, Gurugram - 122004, Haryana, India
| | - Prince Chawla
- Department of Food Technology and Nutrition, Lovely Professional University, Phagwara, 144411, Punjab, India.
| | - Minaxi Sharma
- CARAH ASBL, Rue Paul Pastur, 11, Ath, 7800, Belgium.
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Puišo J, Paškevičius A, Žvirgždas J, Dimitrova TL, Litvakas A, Adliene D. Application of Red Onion Peel Extract for Green Synthesis of Silver Nanoparticles in Hydrogels Exhibiting Antimicrobial Properties. Gels 2023; 9:498. [PMID: 37367169 DOI: 10.3390/gels9060498] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/13/2023] [Accepted: 06/14/2023] [Indexed: 06/28/2023] Open
Abstract
UV-initiated green synthesis of metal nanoparticles by using plant extracts as photoreducing agents is of particular interest since it is an environmentally friendly, easy-to-maintain, and cost-effective method. Plant molecules that act as reducing agents are assembled in a highly controlled way which makes them suitable for metal nanoparticle synthesis. Depending on the plant species, their application for green synthesis of metal nanoparticles for diverse applications may contribute to the mediation/reduction in organic waste amounts, thus enabling the implementation of the circular economy concept. In this work, UV-initiated green synthesis of Ag nanoparticles in hydrogels and hydrogel's thin films containing gelatin (matrix), red onion peel extract of different concentrations, water, and a small amount of 1 M AgNO3 have been investigated and characterized using UV-Vis spectroscopy, SEM and EDS analysis, XRD technique, performing swelling experiments and antimicrobial tests using bacteria (Staphylococcus aureus, Acinetobacter baumannii, Pseudomonas aeruginosa), yeasts (Candida parapsilosis, Candida albicans) and microscopic fungi (Aspergillus flavus, Aspergillus fumigatus). It was found that the antimicrobial effectiveness of the silver-enriched red onion peel extract-gelatin films was higher at lower AgNO3 concentrations as compared to those usually used in the commercially available antimicrobial products. The enhancement of the antimicrobial effectiveness was analyzed and discussed, assuming the synergy between photoreducing agent (red onion peel extract) and silver nitrate (AgNO3) in the initial gel solutions leading to the intensification of Ag nanoparticles production.
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Affiliation(s)
- Judita Puišo
- Department of Physics, Kaunas University of Technology, Studentų Str. 50, LT-51368 Kaunas, Lithuania
| | - Algimantas Paškevičius
- Laboratory of Biodeterioration Research, Institute of Botany, Nature Research Centre, Akademijos Str. 2, LT-08412 Vilnius, Lithuania
| | - Jonas Žvirgždas
- Laboratory of Biodeterioration Research, Institute of Botany, Nature Research Centre, Akademijos Str. 2, LT-08412 Vilnius, Lithuania
| | - Todorka L Dimitrova
- Faculty of Physics and Technology, University of Plovdiv "Paisii Hilendarski", Tzar Assen Str. 24, 4000 Plovdiv, Bulgaria
| | - Andrejus Litvakas
- Department of Physics, Kaunas University of Technology, Studentų Str. 50, LT-51368 Kaunas, Lithuania
| | - Diana Adliene
- Department of Physics, Kaunas University of Technology, Studentų Str. 50, LT-51368 Kaunas, Lithuania
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KARAMAN ERSOY Ş, TÜTEM E, SÖZGEN BAŞKAN K, APAK R. Preparation and application of caffeic acid imprinted polymer. Turk J Chem 2023; 47:699-714. [PMID: 38174067 PMCID: PMC10760595 DOI: 10.55730/1300-0527.3572] [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: 01/31/2023] [Revised: 08/25/2023] [Accepted: 05/22/2023] [Indexed: 01/05/2024] Open
Abstract
In the present study, molecularly imprinted polymers were synthesized using caffeic acid (CA) as a template molecule and then used for the extraction of CA and chlorogenic acid (CLA) from complex matrices. Syntheses were carried out in tetrahydrofuran as porogenic solvent using 4-vinyl pyridine, methacrylic acid, acrylamide, and 1-vinyl imidazole as monomers, ethylene glycol dimethacrylate as crosslinker and 2,2'-azobisisobutyronitrile as initiator. In polymerization processes, different ratios of the template:monomer:crosslinker (T:M:CrL) were used to obtain the most suitable polymer. Caffeic acid:4-vinylpiridine:ethylene glycol dimethacrylate's 1:4:16 mole ratio of MIP was determined as the most convenient polymer for CA recognition. In addition, nonimprinted polymers (NIPs) without templates were prepared. Dynamic and static adsorption tests were applied to determine the absorption features of the NIPs and CA-MIPs. Separation and purification studies of CA and CLA were performed with molecular imprinted solid phase extraction (MISPE) application. All steps of MISPE (loading, washing, elution) were optimized by HPLC analysis.
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Affiliation(s)
- Şeyda KARAMAN ERSOY
- Division of Analytical Chemistry, Faculty of Pharmacy, Fenerbahçe University, İstanbul,
Turkiye
| | - Esma TÜTEM
- Department of Chemistry, Faculty of Engineering, İstanbul University-Cerrahpaşa, İstanbul,
Turkiye
| | - Kevser SÖZGEN BAŞKAN
- Department of Chemistry, Faculty of Engineering, İstanbul University-Cerrahpaşa, İstanbul,
Turkiye
| | - Reşat APAK
- Department of Chemistry, Faculty of Engineering, İstanbul University-Cerrahpaşa, İstanbul,
Turkiye
- Turkish Academy of Sciences (TÜBA), Ankara,
Turkiye
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Yang Y, Shen X. Preparation and Application of Molecularly Imprinted Polymers for Flavonoids: Review and Perspective. Molecules 2022; 27:7355. [PMID: 36364181 PMCID: PMC9653670 DOI: 10.3390/molecules27217355] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 10/16/2022] [Accepted: 10/19/2022] [Indexed: 08/24/2023] Open
Abstract
The separation and detection of flavonoids from various natural products have attracted increasing attention in the field of natural product research and development. Depending on the high specificity of molecularly imprinted polymers (MIPs), MIPs are proposed as efficient adsorbents for the selective extraction and separation of flavonoids from complex samples. At present, a comprehensive review article to summarize the separation and purification of flavonoids using molecular imprinting, and the employment of MIP-based sensors for the detection of flavonoids is still lacking. Here, we reviewed the general preparation methods of MIPs towards flavonoids, including bulk polymerization, precipitation polymerization, surface imprinting and emulsion polymerization. Additionally, a variety of applications of MIPs towards flavonoids are summarized, such as the different forms of MIP-based solid phase extraction (SPE) for the separation of flavonoids, and the MIP-based sensors for the detection of flavonoids. Finally, we discussed the advantages and disadvantages of the current synthetic methods for preparing MIPs of flavonoids and prospected the approaches for detecting flavonoids in the future. The purpose of this review is to provide helpful suggestions for the novel preparation methods of MIPs for the extraction of flavonoids and emerging applications of MIPs for the detection of flavonoids from natural products and biological samples.
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Affiliation(s)
| | - Xiantao Shen
- State Key Laboratory of Environment Health (Incubation), Key Laboratory of Environment and Health, Ministry of Education, Key Laboratory of Environment and Health (Wuhan), Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Hangkong Road #13, Wuhan 430030, China
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Stoica F, Condurache NN, Aprodu I, Andronoiu DG, Enachi E, Stănciuc N, Bahrim GE, Croitoru C, Râpeanu G. Value-added salad dressing enriched with red onion skin anthocyanins entrapped in different biopolymers. Food Chem X 2022; 15:100374. [PMID: 35782960 PMCID: PMC9240365 DOI: 10.1016/j.fochx.2022.100374] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 06/17/2022] [Accepted: 06/18/2022] [Indexed: 11/30/2022] Open
Abstract
The microencapsulation of ROS extract was performed by gelation and freeze-drying. The powders were rich in valuable antioxidants, with over 80% EE for anthocyanins. Good stability of phytochemicals over storage and digestion was noticed. V2 powder’s functionality was tested by its addition to salad dressing. Our results are promising in developing multifunctional ingredients for foods.
In this study, red onion skin extract was used to obtain food ingredients. Complex biopolymeric matrices were dissolved in the anthocyanin-rich aqueous extract, followed by gelation and freeze-drying. Powders were characterized regarding encapsulation efficiency (EE), phytochemical content, color, antioxidant activity, and microstructure. Storage and simulated digestion stability were also assessed. Two powders with high contents of bioactives and antioxidant activity were obtained. The highest EE was acquired for the powder with a higher polysaccharides concentration (V2). In addition, V2 exhibited the best storage stability. The in vitro studies demonstrated that increased carbohydrate concentration delivers the best anthocyanins protection. To prove its functionality, V2 was added to a salad dressing. The addition of powder has improved the concentration of biologically active compounds and the antioxidant activity of the salad dressings. These results support the assumption that microencapsulation may deliver bioactives from red onion skin as functional ingredients for value-added foods.
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Affiliation(s)
- Florina Stoica
- Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, 800201 Galați, Romania
| | - Nina Nicoleta Condurache
- Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, 800201 Galați, Romania
| | - Iuliana Aprodu
- Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, 800201 Galați, Romania
| | - Doina Georgeta Andronoiu
- Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, 800201 Galați, Romania
| | - Elena Enachi
- Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, 800201 Galați, Romania
| | - Nicoleta Stănciuc
- Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, 800201 Galați, Romania
| | - Gabriela Elena Bahrim
- Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, 800201 Galați, Romania
| | - Constantin Croitoru
- Academy of Agricultural and Forestry Sciences, 61 Marasti Blvd, 011464 Bucharest, Romania
| | - Gabriela Râpeanu
- Department of Food Science, Food Engineering, Biotechnology and Aquaculture, Faculty of Food Science and Engineering, Dunărea de Jos University of Galati, 800201 Galați, Romania
- Corresponding author at: Dunărea de Jos University of Galati, Faculty of Food Science and Engineering, Domnească Street 111, Building E, Room 202, 800201 Galati, Romania.
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