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Jermjun K, Khumho R, Thongoiam M, Yousatit S, Yokoi T, Ngamcharussrivichai C, Nuntang S. Natural Rubber/Hexagonal Mesoporous Silica Nanocomposites as Efficient Adsorbents for the Selective Adsorption of (-)-Epigallocatechin Gallate and Caffeine from Green Tea. Molecules 2023; 28:6019. [PMID: 37630270 PMCID: PMC10458317 DOI: 10.3390/molecules28166019] [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: 06/27/2023] [Revised: 08/02/2023] [Accepted: 08/09/2023] [Indexed: 08/27/2023] Open
Abstract
(-)-Epigallocatechin gallate (EGCG) is a bioactive component of green tea that provides many health benefits. However, excessive intake of green tea may cause adverse effects of caffeine (CAF) since green tea (30-50 mg) has half the CAF content of coffee (80-100 mg). In this work, for enhancing the health benefits of green tea, natural rubber/hexagonal mesoporous silica (NR/HMS) nanocomposites with tunable textural properties were synthesized using different amine template sizes and applied as selective adsorbents to separate EGCG and CAF from green tea. The resulting adsorbents exhibited a wormhole-like silica framework, high specific surface area (528-578 m2 g-1), large pore volume (0.76-1.45 cm3 g-1), and hydrophobicity. The NR/HMS materials adsorbed EGCG more than CAF; the selectivity coefficient of EGCG adsorption was 3.6 times that of CAF adsorption. The EGCG adsorption capacity of the NR/HMS series was correlated with their pore size and surface hydrophobicity. Adsorption behavior was well described by a pseudo-second-order kinetic model, indicating that adsorption involved H-bonding interactions between the silanol groups of the mesoporous silica surfaces and the hydroxyl groups of EGCG and the carbonyl group of CAF. As for desorption, EGCG was more easily removed than CAF from the NR/HMS surface using an aqueous solution of ethanol. Moreover, the NR/HMS materials could be reused for EGCG adsorption at least three times. The results suggest the potential use of NR/HMS nanocomposites as selective adsorbents for the enrichment of EGCG in green tea. In addition, it could be applied as an adsorbent in the filter to reduce the CAF content in green tea by up to 81.92%.
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Affiliation(s)
- Kamolwan Jermjun
- Industrial Chemistry Innovation Program, Faculty of Science, Maejo University, Chiang Mai 50290, Thailand;
| | - Rujeeluk Khumho
- Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; (R.K.); (M.T.); (S.Y.); (C.N.)
| | - Mookarin Thongoiam
- Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; (R.K.); (M.T.); (S.Y.); (C.N.)
| | - Satit Yousatit
- Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; (R.K.); (M.T.); (S.Y.); (C.N.)
| | - Toshiyuki Yokoi
- Chemical Resources Laboratory, Tokyo Institute of Technology, Yokohama 226-8503, Japan;
| | - Chawalit Ngamcharussrivichai
- Department of Chemical Technology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand; (R.K.); (M.T.); (S.Y.); (C.N.)
- Center of Excellence on Petrochemical and Materials Technology (PETROMAT), Chulalongkorn University, Bangkok 10330, Thailand
- Center of Excellence in Catalysis for Bioenergy and Renewable Chemicals (CBRC), Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
| | - Sakdinun Nuntang
- Industrial Chemistry Innovation Program, Faculty of Science, Maejo University, Chiang Mai 50290, Thailand;
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Li Q, Ye Y, Li W, Pan F, Xia D, Li A. The efficient adsorption of tetracycline from aqueous solutions onto polymers with different N-vinylpyrrolidone contents: equilibrium, kinetic and dynamic adsorption. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:15158-15169. [PMID: 36166122 DOI: 10.1007/s11356-022-23243-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2022] [Accepted: 09/20/2022] [Indexed: 06/16/2023]
Abstract
Extensive use of antibiotics in the world will cause potential risks to human health and ecosystems. The removal of these antibiotics has attracted much attention. Composite materials are growing attention for diverse pollutants separation and removal based on their specific functionality and surface area. In this study, a series of N-vinylpyrrolidone-divinylbenzene polymers (NVPD) with different N-vinylpyrrolidone (NVP) contents were facilely prepared for the adsorption of tetracycline (TC). The effect of polymer surface properties and aqueous solution chemistry (pH, ionic strength, humic acid) on TC adsorption was further studied. The dynamic adsorption and regeneration experiments were also assessed. The results showed that only 25% of NVP was involved in the reaction. When NVP dosage (%) was 75%, polymer (NVPD-g) owned the largest BET surface area (613.23 m2/g) and obtained the maximum TC adsorption capacities (258.76 mg/g). In the kinetic, the adsorption between TC and polymers with NVP was controlled by chemical adsorption and intra-particle diffusion. The TC adsorption process of NVPD-g depended on the contribution of the hydrophobic effect, electrostatic interactions, H-bonding, π-π electron donor-acceptor (EDA) interactions, and cation-π bonding. Moreover, the removal efficiency of TC by NVPD-g was enhanced in the presence of humic acid (HA) in the dynamic adsorption and 1197 BV (2394 mL) of TC simulated wastewater can be treated. These findings suggest that NVPD-g has a potential application in the purification of TC.
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Affiliation(s)
- Qiang Li
- School of Environmental Engineering, Wuhan Textile University, Wuhan, 430073, People's Republic of China.
- Engineering Research Center for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan, 430073, People's Republic of China.
| | - Yuxuan Ye
- School of Environmental Engineering, Wuhan Textile University, Wuhan, 430073, People's Republic of China
- Engineering Research Center for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan, 430073, People's Republic of China
| | - Wentao Li
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu, 210023, People's Republic of China
| | - Fei Pan
- School of Environmental Engineering, Wuhan Textile University, Wuhan, 430073, People's Republic of China.
- Engineering Research Center for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan, 430073, People's Republic of China.
| | - Dongsheng Xia
- School of Environmental Engineering, Wuhan Textile University, Wuhan, 430073, People's Republic of China
- Engineering Research Center for Clean Production of Textile Dyeing and Printing, Ministry of Education, Wuhan, 430073, People's Republic of China
| | - Aimin Li
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Nanjing, Jiangsu, 210023, People's Republic of China
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Separation and Purification of Two Saponins from Paris polyphylla var. yunnanensis by a Macroporous Resin. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27196626. [PMID: 36235164 PMCID: PMC9570678 DOI: 10.3390/molecules27196626] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 10/03/2022] [Accepted: 10/04/2022] [Indexed: 11/07/2022]
Abstract
An effective method for separating and purifying critical saponins (polyphyllin II and polyphyllin VII) from a Paris polyphylla var. yunnanensis extract was developed in this study which was environmentally friendly and economical. Static adsorption kinetics, thermodynamics, and the dynamic adsorption-desorption of macroporous resins were investigated, and then the conditions of purification and separation were optimized by fitting with an adsorption thermodynamics equation and a kinetic equation. Effective NKA-9 resin from seven macroporous resins was screened out to separate and purify the two saponins. The static adsorption and dynamic adsorption were chemical and physical adsorption dual-processes on the NKA-9 resin. Under the optimum parameters, the contents of polyphyllin II and polyphyllin VII in the product were 17.3-fold and 28.6-fold those in plant extracts, respectively. The total yields of the two saponins were 93.16%. This research thus provides a theoretical foundation for the large-scale industrial production of the natural drugs polyphyllin II and polyphyllin VII.
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Rheological properties of fish (Sparus aurata) skin gelatin modified by agricultural wastes extracts. Food Chem 2022; 393:133348. [PMID: 35661603 DOI: 10.1016/j.foodchem.2022.133348] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 05/24/2022] [Accepted: 05/28/2022] [Indexed: 11/20/2022]
Abstract
In this study, fish skin gelatin (FG) obtained from sea bream (Sparus aurata) was evaluated as an alternative to mammalian gelatin. Improvement in rheological properties of FG was attempted with addition of grape pomace (GP), pomegranate peel (PP), and green tea (GT) extracts, all of which are agricultural wastes rich in phenolic components. These additives were added at ratios of 20%, 13.3%, 10%, and 6.7% to determine the best formulation. Melting and gelling temperatures, kgel, gel strength, and tmodel values of samples were measured. 20% GP added fish gelatin (OG) had optimum rheological properties. Melting temperatures of BG, OG, and FG were 31.64 ± 0.28, 33.80 ± 0.54, 25.78 ± 0.24 °C, respectively. The addition of GP caused a 14% increase in Tg by increasing the intermolecular interactions of FG. GP is important in that it provides functional properties and structural improvement of FG, making it an alternative to BG and facilitating its use in confectionery industry.
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dos Santos FKF, de Rezende CM, da Veiga Júnior VF. Macroporous polymeric resins as a tool to obtain bioactive compounds in food and food-waste: a review. J Food Compost Anal 2022. [DOI: 10.1016/j.jfca.2022.104703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Li H, Guo H, Luo Q, Wu DT, Zou L, Liu Y, Li HB, Gan RY. Current extraction, purification, and identification techniques of tea polyphenols: An updated review. Crit Rev Food Sci Nutr 2021:1-19. [PMID: 34702110 DOI: 10.1080/10408398.2021.1995843] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Tea, as a beverage, has been reputed for its health benefits and gained worldwide popularity. Tea polyphenols, especially catechins, as the main bioactive compounds in tea, exhibit diverse health benefits and have wide applications in the food industry. The development of tea polyphenol-incorporated products is dependent on the extraction, purification, and identification of tea polyphenols. Recent years, many green and novel extraction, purification, and identification techniques have been developed for the preparation of tea polyphenols. This review, therefore, introduces the classification of tea and summarizes the main conventional and novel techniques for the extraction of polyphenols from various tea products. The advantages and disadvantages of these techniques are also intensively discussed and compared. In addition, the purification and identification techniques are summarized. It is hoped that this updated review can provide a research basis for the green and efficient extraction, purification, and identification of tea polyphenols, which can facilitate their utilization in the production of various functional food products and nutraceuticals.
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Affiliation(s)
- Hang Li
- Research Center for Plants and Human Health, Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu, China
| | - Huan Guo
- Research Center for Plants and Human Health, Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu, China
| | - Qiong Luo
- Department of Food Science & Technology, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai, China
| | - Ding-Tao Wu
- Key Laboratory of Coarse Cereal Processing (Ministry of Agriculture and Rural Affairs), Sichuan Engineering & Technology Research Center of Coarse Cereal Industralization, Chengdu University, Chengdu, China
| | - Liang Zou
- Key Laboratory of Coarse Cereal Processing (Ministry of Agriculture and Rural Affairs), Sichuan Engineering & Technology Research Center of Coarse Cereal Industralization, Chengdu University, Chengdu, China
| | - Yi Liu
- Research Center for Plants and Human Health, Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu, China
| | - Hua-Bin Li
- Guangdong Provincial Key Laboratory of Food, Nutrition and Health, Department of Nutrition, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Ren-You Gan
- Research Center for Plants and Human Health, Institute of Urban Agriculture, Chinese Academy of Agricultural Sciences, Chengdu, China.,Key Laboratory of Coarse Cereal Processing (Ministry of Agriculture and Rural Affairs), Sichuan Engineering & Technology Research Center of Coarse Cereal Industralization, Chengdu University, Chengdu, China
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Quintero-Jaramillo JA, Carrero-Mantilla JI, Sanabria-González NR. A Review of Caffeine Adsorption Studies onto Various Types of Adsorbents. ScientificWorldJournal 2021; 2021:9998924. [PMID: 34335116 PMCID: PMC8315881 DOI: 10.1155/2021/9998924] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 06/26/2021] [Accepted: 06/30/2021] [Indexed: 12/03/2022] Open
Abstract
A systematic literature review of publications from 2000 to 2020 was carried out to identify research trends on adsorbent materials for the removal of caffeine from aqueous solutions. Publications were retrieved from three databases (Scopus, Web of Science, and Google Scholar). Words "adsorption AND caffeine" were examined into titles, abstracts, and keywords. A brief bibliometric analysis was performed with emphasis on the type of publication and of most cited articles. Materials for the removal of caffeine were classified according to the type of material into three main groups: organic, inorganic, and composites, each of them subdivided into different subgroups consistent with their origin or production. Tables resume for each subgroup of adsorbents the key information: specific surface area, dose, pH, maximum adsorption capacity, and isotherm models for the removal of caffeine. The highest adsorption capacities were achieved by organic adsorbents, specifically those with granular activated carbon (1961.3 mg/g) and grape stalk activated carbon (916.7 mg/g). Phenyl-phosphate-based porous organic polymer (301 mg/g), natural sandy loam sediment (221.2 mg/g), composites of MCM-48 encapsulated graphene oxide (153.8 mg/g), and organically modified clay (143.7 mg/g) showed adsorption capacities lower than those of activated carbons. In some activated carbons, a relation between the specific surface area (SSA) and the maximum adsorption capacity (Q max) was found.
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Affiliation(s)
- Javier Andrés Quintero-Jaramillo
- Departamento de Ingeniería Química, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 7 vía al Aeropuerto, AA 127, Manizales, Colombia
| | - Javier Ignacio Carrero-Mantilla
- Departamento de Ingeniería Química, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 7 vía al Aeropuerto, AA 127, Manizales, Colombia
| | - Nancy Rocío Sanabria-González
- Departamento de Ingeniería Química, Universidad Nacional de Colombia Sede Manizales, Campus La Nubia, km 7 vía al Aeropuerto, AA 127, Manizales, Colombia
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Chen W, Yang Z, Fu X, Du L, Tian Y, Wang J, Cai W, Guo P, Wu C. Synthesis of a Removable Cytoprotective Exoskeleton by Tea Polyphenol Complexes for Living Cell Encapsulation. ACS Biomater Sci Eng 2021; 7:764-771. [PMID: 33438418 DOI: 10.1021/acsbiomaterials.0c01617] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Cell encapsulation is a chemical tool for endowing living cells with exogenous properties and enhancing their in vitro tolerance against lethal factors, which has shown promising prospects and potential applications in many fields such as cell transplantation, drug delivery, and tissue engineering. One-pot precipitation of a polyphenol-metal complex on cells protects cells from UV irradiation and lytic enzymes. However, the involvement of metal ions brings side effects on cell viability and growth. Moreover, an external removal agent is needed for cell division and growth. Herein, a polymer shell composed of hydrogen bonded constituents without affecting cell viability and growth by the precipitation of tea polyphenol and polyvinyl pyrrolidone is reported. The formation of the polymer shell was verified by the Au nanoparticle's laser scanning confocal reflectance and quartz crystal microbalance measurement. The thickness of the shell was managed by the concentration of the complex. When exposed to UV irradiation for 15 or 30 min, polymer-coating-protected Saccharomyces cerevisiae (yeast) had much higher cell viability than the native one. Exposed to a high temperature environment (60 °C), most of the coated yeasts survived in contrast to uncoated ones. For the cell division and growth curve, the polymer coating with various thicknesses had no difference to the native one, which indicated no suppression of cell growth and no external side effects involved. As applied to mammalian HeLa cells under UV irradiation for 15 min, the coated cells had an obvious higher cell viability than that of untreated ones. Therefore, the tea polyphenol-poly(vinylpyrrolidone) shell is a versatile tool for chemically controlling the external properties of cells without side effects on cell viability and growth.
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Affiliation(s)
- Wei Chen
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Zhao Yang
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Xingchuang Fu
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Liping Du
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China.,Biosensor National Special Laboratory, Key Laboratory for Biomedical Engineering of Ministry of Education, Department of Biomedical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yulan Tian
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Jian Wang
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Wen Cai
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Ping Guo
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Chunsheng Wu
- Institute of Medical Engineering, Department of Biophysics, School of Basic Medical Sciences, Health Science Center, Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
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Pires BC, Dutra FVA, Borges KB. Synthesis of mesoporous magnetic polypyrrole and its application in studies of removal of acidic, neutral, and basic pharmaceuticals from aqueous medium. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:6488-6504. [PMID: 31873881 DOI: 10.1007/s11356-019-07207-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Accepted: 11/28/2019] [Indexed: 06/10/2023]
Abstract
As an alternative to traditional adsorbents, mesoporous magnetic polypyrrole (MMPPy) was first used as an adsorbent for the removal of acid, neutral, and basic pharmaceutical compounds considered aqueous pollutants. Ibuprofen (IBU, acid), caffeine (CAF, neutral), and bupropion (BUP, basic) were chosen as adsorbates and applied in adsorption studies. They proved to be pH dependent of the aqueous solution and the best results were found at pH 4 for IBU and CAF and pH 7 for BUP and 60 mg was the optimal amount of adsorbent to be used in the studies. Adsorption was extremely fast and the equilibrium was reached up to 180 s. The adsorption data of all analytes could be well interpreted by the pseudo second-order kinetic model and the dual-site Langmuir-Freundlich isotherm model. The adsorption capacities obtained by the dual-site Langmuir-Freundlich model were 53.67 mg g-1, 16.74 mg g-1, and 24.72 mg g-1 for IBU, CAF, and BUP, respectively. Thermodynamic parameters revealed that IBU adsorption becomes spontaneous as temperature increases and CAF and BUP adsorption occurs through a non-spontaneous process. In addition, this study shows endothermic nature of the adsorption process. Analytes were desorbed using an aqueous solution at pH 10 for IBU, pH 7 for CAF, and pH 4 for BUP and then the material was regenerated successfully. The results suggest that MMPPy can be efficiently used in the removal of different organic analytes found in contaminated water.
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Affiliation(s)
- Bruna Carneiro Pires
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, São João del-Rei, Minas Gerais, 36301-160, Brazil
| | - Flávia Viana Avelar Dutra
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, São João del-Rei, Minas Gerais, 36301-160, Brazil
| | - Keyller Bastos Borges
- Departamento de Ciências Naturais, Universidade Federal de São João del-Rei, Campus Dom Bosco, Praça Dom Helvécio 74, Fábricas, São João del-Rei, Minas Gerais, 36301-160, Brazil.
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Cao Y, Qi X, Yan H. Selective adsorption of tannins over small polyphenols on cross-linked polyacrylamide hydrogel beads and their regeneration with hot water. REACT FUNCT POLYM 2020. [DOI: 10.1016/j.reactfunctpolym.2019.104398] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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12
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Adsorption of vanillic and syringic acids onto a macroporous polymeric resin and recovery with ethanol:water (90:10 %V/V) solution. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.02.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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13
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Estimation of quality parameters in virgin olive oil treated with olive leaf extract: application of artificial neural networks. CHEMICAL PAPERS 2018. [DOI: 10.1007/s11696-018-0669-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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14
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Carrasco-Sánchez V, Marican A, Vergara-Jaque A, Folch-Cano C, Comer J, Laurie VF. Polymeric substances for the removal of ochratoxin A from red wine followed by computational modeling of the complexes formed. Food Chem 2018; 265:159-164. [DOI: 10.1016/j.foodchem.2018.05.089] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 04/25/2018] [Accepted: 05/20/2018] [Indexed: 11/25/2022]
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15
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Nikoo M, Regenstein JM, Ahmadi Gavlighi H. Antioxidant and Antimicrobial Activities of (-)-Epigallocatechin-3-gallate (EGCG) and its Potential to Preserve the Quality and Safety of Foods. Compr Rev Food Sci Food Saf 2018; 17:732-753. [PMID: 33350134 DOI: 10.1111/1541-4337.12346] [Citation(s) in RCA: 85] [Impact Index Per Article: 14.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Revised: 02/26/2018] [Accepted: 02/26/2018] [Indexed: 12/19/2022]
Abstract
Quality deterioration of fresh or processed foods is a major challenge for the food industry not only due to economic losses but also due to the risks associated with spoiled foods resulting, for example, from toxic compounds. On the other hand, there are increasing limitations on the application of synthetic preservatives such as antioxidants in foods because of their potential links to human health risks. With the new concept of functional ingredients and the development of the functional foods market, and the desire for a "clean" label, recent research has focused on finding safe additives with multifunctional effects to ensure food safety and quality. (-)-Epigallocatechin-3-gallate (EGCG), a biologically active compound in green tea, has received considerable attention in recent years and is considered a potential alternative to synthetic food additives. EGCG has been shown to prevent the growth of different Gram-positive and Gram-negative bacteria responsible for food spoilage while showing antioxidant activity in food systems. This review focuses on recent findings related to EGCG separation techniques, modification of its structure, mechanisms of antioxidant and antimicrobial activities, and applications in preserving the quality and safety of foods.
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Affiliation(s)
- Mehdi Nikoo
- the Dept. of Pathobiology and Quality Control, Artemia and Aquaculture Research Inst., Urmia Univ., Urmia, West Azerbaijan, 57561-51818, Iran
| | - Joe M Regenstein
- Dept. of Food Science, Cornell Univ., Ithaca, N.Y., 14853-7201, U.S.A
| | - Hassan Ahmadi Gavlighi
- Dept. of Food Science and Technology, Faculty of Agriculture, Tarbiat Modares Univ., Tehran, 14115-336, Iran
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Methotrexate-loaded porous polymeric adsorbents as oral sustained release formulations. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 78:598-602. [DOI: 10.1016/j.msec.2017.04.136] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 04/21/2017] [Indexed: 12/25/2022]
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17
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Yammine S, Brianceau S, Manteau S, Turk M, Ghidossi R, Vorobiev E, Mietton-Peuchot M. Extraction and purification of high added value compounds from by-products of the winemaking chain using alternative/nonconventional processes/technologies. Crit Rev Food Sci Nutr 2017; 58:1375-1390. [DOI: 10.1080/10408398.2016.1259982] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Sami Yammine
- Université de Bordeaux, Institut des Sciences de la Vigne et du Vin, EA 4577, Unité de recherche œnologie, Villenave d'Ornon, France
- INRA, ISVV, USC 1366 Œnologie, Villenave d'Ornon, France
| | - Sylène Brianceau
- Sorbonne Universités, Université de technologie de Compiègne, EA 4297 TIMR, Centre de recherche Royallieu, Compiègne, France
| | | | - Mohammad Turk
- Sorbonne Universités, Université de technologie de Compiègne, EA 4297 TIMR, Centre de recherche Royallieu, Compiègne, France
- Ecole Supérieure de Chimie Organique et Minérale, EA 4297 TIMR, Compiègne, France
| | - Rémy Ghidossi
- Université de Bordeaux, Institut des Sciences de la Vigne et du Vin, EA 4577, Unité de recherche œnologie, Villenave d'Ornon, France
- INRA, ISVV, USC 1366 Œnologie, Villenave d'Ornon, France
| | - Eugène Vorobiev
- Sorbonne Universités, Université de technologie de Compiègne, EA 4297 TIMR, Centre de recherche Royallieu, Compiègne, France
| | - Martine Mietton-Peuchot
- Université de Bordeaux, Institut des Sciences de la Vigne et du Vin, EA 4577, Unité de recherche œnologie, Villenave d'Ornon, France
- INRA, ISVV, USC 1366 Œnologie, Villenave d'Ornon, France
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18
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Removal of fumonisin B1 and B2 from model solutions and red wine using polymeric substances. Food Chem 2017; 224:207-211. [DOI: 10.1016/j.foodchem.2016.12.081] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2016] [Revised: 12/20/2016] [Accepted: 12/21/2016] [Indexed: 11/21/2022]
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19
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Liu C, Ge S, Yang J, Xu Y, Zhao M, Xiong L, Sun Q. Adsorption mechanism of polyphenols onto starch nanoparticles and enhanced antioxidant activity under adverse conditions. J Funct Foods 2016. [DOI: 10.1016/j.jff.2016.08.036] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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20
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Zhang X, Xu Y, Zhang Q, Cao K, Mu X. Simultaneous separation and purification of (−)-epigallocatechin gallate and caffeine from tea extract by size exclusion effect on modified porous adsorption material. J Chromatogr B Analyt Technol Biomed Life Sci 2016; 1031:29-36. [DOI: 10.1016/j.jchromb.2016.06.052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 06/28/2016] [Accepted: 06/29/2016] [Indexed: 10/21/2022]
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21
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Monsanto M, Radhakrishnan AT, Zondervan E. Modelling of packed bed adsorption columns for the separation of green tea catechins. SEP SCI TECHNOL 2016. [DOI: 10.1080/01496395.2016.1211146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Miguel Monsanto
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Adithya Thota Radhakrishnan
- Department of Chemical Engineering and Chemistry, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Edwin Zondervan
- Department of Production Engineering, Bremen University, Bremen, Germany
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22
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Banerjee S, Chatterjee J. Efficient extraction strategies of tea (Camellia sinensis) biomolecules. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2015; 52:3158-68. [PMID: 26028699 PMCID: PMC4444893 DOI: 10.1007/s13197-014-1487-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 05/27/2014] [Accepted: 07/15/2014] [Indexed: 12/16/2022]
Abstract
Tea is a popular daily beverage worldwide. Modulation and modifications of its basic components like catechins, alkaloids, proteins and carbohydrate during fermentation or extraction process changes organoleptic, gustatory and medicinal properties of tea. Through these processes increase or decrease in yield of desired components are evident. Considering the varied impacts of parameters in tea production, storage and processes that affect the yield, extraction of tea biomolecules at optimized condition is thought to be challenging. Implementation of technological advancements in green chemistry approaches can minimize the deviation retaining maximum qualitative properties in environment friendly way. Existed extraction processes with optimization parameters of tea have been discussed in this paper including its prospects and limitations. This exhaustive review of various extraction parameters, decaffeination process of tea and large scale cost effective isolation of tea components with aid of modern technology can assist people to choose extraction condition of tea according to necessity.
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Affiliation(s)
- Satarupa Banerjee
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, 721302 West Bengal India
| | - Jyotirmoy Chatterjee
- School of Medical Science and Technology, Indian Institute of Technology, Kharagpur, 721302 West Bengal India
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23
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Recovery of (−)-epigallocatechingallate (EGCG) from aqueous solution by selective adsorption onto spent coffee grounds. Eur Food Res Technol 2015. [DOI: 10.1007/s00217-015-2472-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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24
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Yao L, Zhang N, Wang C, Wang C. Highly selective separation and purification of anthocyanins from bilberry based on a macroporous polymeric adsorbent. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:3543-3550. [PMID: 25786117 DOI: 10.1021/jf506107m] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
Powdered bilberry extract (United States Pharmacopoeia, USP35-NF30), which is prepared from ripe bilberry fruits (Vaccinium myrtillus L.), is the main ingredient of drugs alleviating visual fatigue and diabetic retinopathy because of the rich anthocyanins (purity of 36%). In this study, a method based on a macroporous polymeric adsorbent was established to obtain anthocyanin compounds from bilberry, in which the purity of the anthocyanins was improved to 96%, conducive to further pharmacological research and improvement of the efficiency of the drug. On the basis of the structure of anthocyanins, we designed a series of macroporous polymeric adsorbents based on the copolymerization of divinylbenzene (DVB) and ethylene glycol dimethyl acrylate (EGDMA). In this situation, EGDMA not only regulated the polarity of the adsorbent but also acted as the cross-linking agent to ensure the matrix structure of the adsorbent, which had a high specific surface area and could provide more interaction sites during adsorption with anthocyanins. Among the synthesized polymeric adsorbents with different contents of EGDMA, the one with 20% EGDMA content (DE-20) was demonstrated to exhibit optimal adsorption capacity and selectivity to anthocyanins compared to various commercial adsorbents through static adsorption and desorption experiments. In addition, the optimum condition of the dynamic adsorption-desorption experiment was further explored. The results indicated that the purity of anthocyanins after rinsing with 20% ethanol was determined to be approximately 96% at a desorption ratio of 83%, which was clearly higher than that in powdered bilberry extract. The established separation and purification method of anthocyanins with high purity is expected to be applied in industrial production.
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Affiliation(s)
- Lijuan Yao
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People's Republic of China
| | - Na Zhang
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People's Republic of China
| | - Chenbiao Wang
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People's Republic of China
| | - Chunhong Wang
- Key Laboratory of Functional Polymer Materials, Ministry of Education, Institute of Polymer Chemistry, Collaborative Innovation Center of Chemical Science and Engineering, Nankai University, Tianjin 300071, People's Republic of China
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25
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Monsanto M, Mestrom R, Zondervan E, Bongers P, Meuldijk J. Solvent Swing Adsorption for the Recovery of Polyphenols from Black Tea. Ind Eng Chem Res 2014. [DOI: 10.1021/ie503590m] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Miguel Monsanto
- Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Rik Mestrom
- Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Edwin Zondervan
- Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
| | - Peter Bongers
- Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
- Unilever, 3133 AT Vlaardingen, The Netherlands
| | - Jan Meuldijk
- Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands
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26
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KITAMURA A, KITAYAMA Y, OOYA T, TAKEUCHI T. Molecularly Imprinted Polymers for Catechin Recognition Prepared Using Dummy-Template Molecules. CHROMATOGRAPHY 2014. [DOI: 10.15583/jpchrom.2014.023] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
| | | | - Tooru OOYA
- Graduate School of Engineering, Kobe University
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27
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Fan FY, Gan Q, Dong ZB, Song KJ, Zheng XQ, Liang YR, Lu JL. Selective elution of tea catechins and caffeine from polyvinylpolypyrrolidone. Int J Food Sci Technol 2013. [DOI: 10.1111/ijfs.12461] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Fang-Yuan Fan
- Zhejiang University Tea Research Institute; Hangzhou 310058 China
| | - Quan Gan
- Zhejiang University Tea Research Institute; Hangzhou 310058 China
| | - Zhan-Bo Dong
- Zhejiang University Tea Research Institute; Hangzhou 310058 China
- Wenzhou Vocational College of Science and Technology; Wenzhou 325006 China
| | - Kwan-Jeong Song
- Faculty of Bioscience and Industry; Jeju National University; Jeju 690756 Korea
| | - Xin-Qiang Zheng
- Zhejiang University Tea Research Institute; Hangzhou 310058 China
| | - Yue-Rong Liang
- Zhejiang University Tea Research Institute; Hangzhou 310058 China
| | - Jian-Liang Lu
- Zhejiang University Tea Research Institute; Hangzhou 310058 China
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28
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Galván D’Alessandro L, Vauchel P, Przybylski R, Chataigné G, Nikov I, Dimitrov K. Integrated process extraction–adsorption for selective recovery of antioxidant phenolics from Aronia melanocarpa berries. Sep Purif Technol 2013. [DOI: 10.1016/j.seppur.2013.09.027] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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29
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Impact of structural and textural membrane properties on lemon juice clarification. FOOD AND BIOPRODUCTS PROCESSING 2013. [DOI: 10.1016/j.fbp.2012.12.001] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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30
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Folch-Cano C, Olea-Azar C, Speisky H. Structural and thermodynamic factors on the adsorption process of phenolic compounds onto polyvinylpolypyrrolidone. Colloids Surf A Physicochem Eng Asp 2013. [DOI: 10.1016/j.colsurfa.2012.11.017] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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31
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Production of caffeinated and decaffeinated green tea catechin powders from underutilised old tea leaves. J FOOD ENG 2012. [DOI: 10.1016/j.jfoodeng.2011.12.026] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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32
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Ma N, Wang P, Kong X, Shi R, Yuan Z, Wang C. Selective removal of caffeine from tea extracts using macroporous crosslinked polyvinyl alcohol adsorbents. J Sep Sci 2011; 35:36-44. [PMID: 22102370 DOI: 10.1002/jssc.201100598] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2011] [Revised: 09/27/2011] [Accepted: 09/27/2011] [Indexed: 11/06/2022]
Abstract
The hydrolysis reaction of ester groups in vinyl acetate (VAc) was used to introduce hydroxyl groups into the matrix of a macroporous adsorbent, which was itself prepared by free radical suspension copolymerization of triallyl isocyanurate (TAIC) and VAc. Therefore, the copolymerization incompatibility between the hydrophilic and the hydrophobic monomer was overcome successfully and the hydrophobic matrix of the polymeric adsorbent containing a polyvinyl alcohol (PVA) segment was obtained. Introduction of the PVA segment decreased the hydrophobic adsorption affinity of the adsorbent while producing the hydrogen-bonding interaction. When isolating the two active components, polyphenols (TPh) and caffeine (CAF), from green tea extracts, this polymeric adsorbent, namely poly(TAIC-co-VA), exhibited good adsorption selectivity towards TPh over CAF. The adsorption mechanism leading to this selectivity involved a hydrophobic interaction mechanism for CAF and multiple weak hydrophobic and hydrogen-bonding interactions for TPh. The adsorption thermodynamics for TPh on poly(TAIC-co-VA) were studied. The effects of adsorbent structure and gradient desorption conditions on isolation were investigated. The result showed that adsorbent, with 20% TAIC content, was able to efficiently remove CAF from different tea extracts with different ratios of TPh and CAF. Finally, almost no CAF was detected in the TPh fraction and the recovery of TPh was greater than 95%.
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Affiliation(s)
- Ning Ma
- Key Laboratory of Functional Polymer Materials of the Ministry of Education, Institute of Polymer Chemistry, Nankai University, Tianjin, P. R. China
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33
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Vuong QV, Bowyer MC, Roach PD. L-Theanine: properties, synthesis and isolation from tea. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2011; 91:1931-9. [PMID: 21735448 DOI: 10.1002/jsfa.4373] [Citation(s) in RCA: 131] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/15/2010] [Revised: 02/07/2011] [Accepted: 02/09/2011] [Indexed: 05/22/2023]
Abstract
Theanine is a non-protein amino acid that occurs naturally in the tea plant (Camellia sinensis) and contributes to the favourable taste of tea. It is also associated with effects such as the enhancement of relaxation and the improvement of concentration and learning ability. It is also linked with health benefits including the prevention of certain cancers and cardiovascular disease, the promotion of weight loss and enhanced performance of the immune system. Thus, there has been a significant rise in the demand for theanine. While theanine has been chemically and biologically synthesised, techniques to isolate theanine from natural sources remain an important area of research. In this review article, the properties and health benefits of theanine are summarised and the synthesis and isolation of theanine are reviewed and discussed. Future perspectives for the isolation of theanine from natural sources are also outlined.
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Affiliation(s)
- Quan V Vuong
- School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW 2258, Australia.
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34
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Soto ML, Moure A, Domínguez H, Parajó JC. Recovery, concentration and purification of phenolic compounds by adsorption: A review. J FOOD ENG 2011. [DOI: 10.1016/j.jfoodeng.2011.02.010] [Citation(s) in RCA: 331] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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35
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Vuong QV, Stathopoulos CE, Nguyen MH, Golding JB, Roach PD. Isolation of Green Tea Catechins and Their Utilization in the Food Industry. FOOD REVIEWS INTERNATIONAL 2011. [DOI: 10.1080/87559129.2011.563397] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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36
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Araya JJ, Zhang H, Prisinzano TE, Mitscher LA, Timmermann BN. Identification of unprecedented purine-containing compounds, the zingerines, from ginger rhizomes (Zingiber officinale Roscoe) using a phase-trafficking approach. PHYTOCHEMISTRY 2011; 72:935-41. [PMID: 21497863 PMCID: PMC3142310 DOI: 10.1016/j.phytochem.2011.03.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2010] [Revised: 01/22/2011] [Accepted: 03/02/2011] [Indexed: 05/30/2023]
Abstract
Three unprecedented purine-containing compounds, named [6]-, [8]-, and [10]-zingerines as they are 5-(6-amino-9H-purin-9-yl) analogs of [6]-, [8]-, and [10]-gingerols, respectively, were isolated from a methanolic extract of ginger rhizomes using a phase trafficking-based method that utilizes solid phase reagents allowing for fast and selective simultaneous separation of basic, acidic, and neutral components of natural products extracts.
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Affiliation(s)
- Juan J. Araya
- Department of Medicinal Chemistry, University of Kansas, Lawrence, KS 66045
| | - Huaping Zhang
- Department of Medicinal Chemistry, University of Kansas, Lawrence, KS 66045
| | | | - Lester A. Mitscher
- Department of Medicinal Chemistry, University of Kansas, Lawrence, KS 66045
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37
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Vuong QV, Golding JB, Nguyen M, Roach PD. Extraction and isolation of catechins from tea. J Sep Sci 2011; 33:3415-28. [PMID: 21049524 DOI: 10.1002/jssc.201000438] [Citation(s) in RCA: 101] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Tea is a major source of catechins, which have become well known for their antioxidant potential. Numerous human, animal, and in vitro studies have linked tea catechins with prevention of certain types of cancers, reduction of the risks for obesity, diabetes, and cardiovascular disease, and improvement of the immune system. Tea catechins are widely used in various neutraceuticals, pharmaceuticals, and cosmetics for either enhancing product shelf-life or for enhancing human health. Thus, the demand for catechins has increased considerably. Catechins have been extracted and isolated from tea leaves by numerous methods through several steps including: treatment of the tea leaves, extraction of catechins from teas into solvents, isolation of catechins from other extracted components, and drying the preparations to obtain catechin extracts in a powder form. This paper outlines the physical and chemical properties of the tea catechins and reviews the extraction steps of the various extraction methods, as a basis to improve and further develop the extraction and isolation of the tea catechins.
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Affiliation(s)
- Quan V Vuong
- School of Environmental and Life Sciences, University of Newcastle, Ourimbah, NSW, Australia.
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38
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Araya JJ, Montenegro G, Mitscher LA, Timmermann BN. Application of phase-trafficking methods to natural products research. JOURNAL OF NATURAL PRODUCTS 2010; 73:1568-1572. [PMID: 20704309 PMCID: PMC2945427 DOI: 10.1021/np100465h] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
A novel simultaneous phase-trafficking approach using spatially separated solid-supported reagents for rapid separation of neutral, basic, and acidic compounds from organic plant extracts with minimum labor is reported. Acidic and basic ion-exchange resins were physically separated into individual sacks ("tea bags") for trapping basic and acidic compounds, respectively, leaving behind in solution neutral components of the natural mixtures. Trapped compounds were then recovered from solid phase by appropriate suspension in acidic or basic solutions. The feasibility of the proposed separation protocol was demonstrated and optimized with an "artificial mixture" of model compounds. In addition, the utility of this methodology was illustrated with the successful separation of the alkaloid skytanthine from Skytanthus acutus Meyen and the main catechins and caffeine from Camellia sinensis L. (Kuntze). This novel approach offers multiple advantages over traditional extraction methods, as it is not labor intensive, makes use of only small quantities of solvents, produces fractions in adequate quantities for biological assays, and can be easily adapted to field conditions for bioprospecting activities.
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Affiliation(s)
| | | | - Lester A. Mitscher
- Corresponding authors. Tel: (785)864-4844. Fax: (785)864-5326. ; Tel: (785)864-4495. Fax: (785)864-5326.
| | - Barbara N. Timmermann
- Corresponding authors. Tel: (785)864-4844. Fax: (785)864-5326. ; Tel: (785)864-4495. Fax: (785)864-5326.
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39
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Li R, Zhao R, Zhang H, Li C, Feng D, Qin P, Tan T. A Novel Medium Poly(vinyl acetate-triallyl isocyanurate-divinylbenzene) Coupled with Oligo-β-Cyclodextrin for the Isolation of Puerarin from Pueraria Flavones. Chromatographia 2010. [DOI: 10.1365/s10337-010-1625-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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