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Glinski JA, Gleńsk M, Silverman B, Glinski VB, Dudek MK. Conformational preferences of cocoa oligomeric proanthocyanidins and their influence on polarity. J Chromatogr A 2024; 1734:465294. [PMID: 39216283 DOI: 10.1016/j.chroma.2024.465294] [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: 05/08/2024] [Revised: 08/19/2024] [Accepted: 08/20/2024] [Indexed: 09/04/2024]
Abstract
Proanthocyanidins (OPACs) are the second largest class of plant metabolites after lignans. Although knowledge of their 3D conformations would add greatly to our understanding of their biological properties, very little has been published on the conformations of OPACs with a degree of polymerization (DP) above 4. We investigated the conformations of the linear epicatechin oligomers, prominent representatives of OPACs prevalent in apples and cocoa, where the epicatechin units are interconnected through the 4β-8 bonds. For DP-2 to DP-10 oligomers, conformational preferences reflected in the arrangement of consecutive flavan-3-ol units, are characterized by the φ torsion. For dimers, there are two energy wells corresponding to two preferred φ torsions, designated as compact and extended form. This behaviour is preserved in OPACs with higher DPs, but the most energetically favoured conformations are a combination of both, with compact-only or extended-only conformations being very unlikely. Thus, oligomers with DP ≥ 7 tend to assume an overall conformation approximating a spherical shape. This shape has a significant influence on the polarity of the OPAC oligomers expressed as 3D polar surface area, calculated using Spartan software for geometry-optimized 3D models, and possibly on other physicochemical properties. The results of polarity calculations provide a molecular-level rationale for the polarity-based chromatographic separation of the cocoa B-type procyanidins with DP range 4 to 10. In our experiments, using centrifugal partition chromatography (CPC) (a solvent system consisting of EtOAc-EtOH-water (6:1:5) v/v/v with aqueous phase stationary and upper phase mobile) we found that an enriched mixture of proanthocyanidins eluted first DP-1 (epicatechin) followed by consecutive elution of the DP-2 to DP-10 in the linear 4β-8 form. We demonstrated that such separation would not be possible if compact-only or extended-only conformations were present in solution. However, for the energy-favoured, spherically shaped conformations, the observed CPC elution order is fully justified.
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Affiliation(s)
- Jan A Glinski
- Planta Analytica LLC, New Milford, CT 06776, United States
| | - Michał Gleńsk
- Department of Pharmacognosy and Herbal Medicines, Wroclaw Medical University, Borowska 211A, 50-556 Wrocław, Poland
| | | | | | - Marta K Dudek
- Centre of Molecular and Macromolecular Studies, Polish Academy of Sciences, Sienkiewicza 112, 90-363 Łódź, Poland.
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2
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Abdulsalam RA, Ijabadeniyi OA, Sabiu S. Fatty acid-modified chitosan and nanoencapsulation of essential oils: A snapshot of applications. Carbohydr Res 2024; 542:109196. [PMID: 38936268 DOI: 10.1016/j.carres.2024.109196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 06/14/2024] [Accepted: 06/18/2024] [Indexed: 06/29/2024]
Abstract
Chitosan (CS) and its modification with fatty acid (FA) in addition to the nanoencapsulation with essential oils (EOs) have emerged as promising approaches with diverse applications, particularly in food and fruit preservation. This review aims to curate data on the prospects of CS modified with FA as nanostructures, serving as carriers for EOs and its application in the preservation of fruits. A narrative review with no restricted period was used for the general overview of CS and strategies for its modification with FA. Report on CS modified with FA and nanoencapsulation with EO and their applications were appraised. The prospects of CS modified with FA and EO nanoencapsulation in food and fruit preservation were outlined. Most chitosan-fatty acid (CS-FA) studies have found relevance in water, medical and pharmaceutical industries, with few studies on food preservation. CS-FA formulation with EOs shows substantial potential in preserving fruits and will significantly impact the food industry in the future by extending the shelf life of fruits and reducing food waste.
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Affiliation(s)
- Rukayat Abiola Abdulsalam
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, P.O. Box 1334, Durban, 4000, South Africa
| | - Oluwatosin Ademola Ijabadeniyi
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, P.O. Box 1334, Durban, 4000, South Africa
| | - Saheed Sabiu
- Department of Biotechnology and Food Science, Faculty of Applied Sciences, Durban University of Technology, P.O. Box 1334, Durban, 4000, South Africa.
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3
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Wang M, Chen Y, Zhang Y, Zhao K, Feng X. Selective removal of Cr(VI) by tannic acid and polyethyleneimine modified zero-valent iron particles with air stability. JOURNAL OF HAZARDOUS MATERIALS 2023; 458:132018. [PMID: 37441863 DOI: 10.1016/j.jhazmat.2023.132018] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/26/2023] [Revised: 06/23/2023] [Accepted: 07/06/2023] [Indexed: 07/15/2023]
Abstract
In this study, a new composite adsorbent for Cr(VI) removal was developed by immobilizing polyethyleneimine (PEI) on the surface of zero-valent iron (ZVI) particles with tannic acid (TA) as a stabilizer. The adsorbent (denoted as Fe-TA-PEI-10) was easy to prepare and regenerate, requiring no conditions for storage. It was found to be particularly effective for Cr(VI) removal from wastewater via reduction and adsorption. Electrochemical analysis revealed that TA significantly reduced the electron transfer resistance of Fe-TA-PEI-10 and reduced the highly toxic Cr(VI)to the less toxic Cr(III). In addition, PEI endowed amino groups to Fe-TA-PEI-10, raising the zero charge point (pHpzc) of Fe-TA-PEI-10 (pHpzc= 7.80), allowing it to adsorb Cr(VI) from the solution rapidly under electrostatic forces and chelating effects. The adsorption process was consistent with the pseudo-first-order model (R2 >0.99) and the Langmuir isotherm model (R2 >0.99), and the maximum adsorption capacity could reach 161.6 mg/g. In particular, this study presented for the first time that TA-modified Fe(0) had excellent stability in the air, and the adsorbent showed no decrease in performance for Cr(VI) removal even after exposure to the air for 30 days. When tested with a simulated electroplating rinsing wastewater, the Fe-TA-PEI-10 showed very high selectivity for Cr(VI) removal. The mechanism of Cr(VI) removal with Fe-TA-PEI-10 was found to be based on adsorption and reduction. This work provided a new scheme for developing efficient and long-lasting reactive adsorbent for Cr(VI) removal.
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Affiliation(s)
- Meng Wang
- School of Materials Science and Engineering, State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, PR China
| | - Yingbo Chen
- School of Materials Science and Engineering, State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, PR China.
| | - Yuanyuan Zhang
- School of Materials Science and Engineering, State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, PR China
| | - Ke Zhao
- School of Materials Science and Engineering, State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, Tianjin 300387, PR China
| | - Xianshe Feng
- Department of Chemical Engineering, University of Waterloo, Waterloo N2L 3G1, Ontario, Canada
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4
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Imran IB, Engström MT, Karonen M, Williams AR, Salminen JP. Alkaline oxidization can increase the in vitro antiparasitic activity of proanthocyanidin-rich plant extracts against Ascarissuum. Exp Parasitol 2023; 248:108493. [PMID: 36889503 DOI: 10.1016/j.exppara.2023.108493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 02/07/2023] [Accepted: 02/21/2023] [Indexed: 03/08/2023]
Abstract
Proanthocyanidins (PAs) are a class of plant specialized metabolites with well-documented bioactivities such as antiparasitic effects. However, little is known about how the modification of PAs influences their bioactivity. The objective of this study was to investigate a wide range of PA-containing plant samples to determine if extracts containing PAs modified by oxidation had altered antiparasitic activities, compared to the original extracts that had not been modified in alkaline conditions. We extracted and analyzed samples from 61 proanthocyanidin-rich plants. The extracts were then oxidized under alkaline conditions. We used these non-oxidized and oxidized proanthocyanidin-rich extracts to conduct a detailed analysis of direct antiparasitic effects against the intestinal parasite Ascaris suum in vitro. These tests showed that the proanthocyanidin-rich extracts had antiparasitic activity. Modification of these extracts significantly increased the antiparasitic activity for the majority the extracts, suggesting that the oxidation procedure enhanced the bioactivity of the samples. Some samples that showed no antiparasitic activity before oxidation showed very high activity after the oxidation. High levels of other polyphenols in the extracts, such as flavonoids, was found to be associated with increased antiparasitic activity following oxidation. Thus, our in vitro screening opens up the opportunity for future research to better understand the mechanism of action how alkaline treatment of PA-rich plant extracts increases their biological activity and potential as novel anthelmintics.
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Affiliation(s)
- Iqbal Bin Imran
- Natural Chemistry Research Group, Department of Chemistry, University of Turku, FI-20014, Turku, Finland; Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark.
| | - Marica T Engström
- Natural Chemistry Research Group, Department of Chemistry, University of Turku, FI-20014, Turku, Finland
| | - Maarit Karonen
- Natural Chemistry Research Group, Department of Chemistry, University of Turku, FI-20014, Turku, Finland
| | - Andrew R Williams
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg, Denmark
| | - Juha-Pekka Salminen
- Natural Chemistry Research Group, Department of Chemistry, University of Turku, FI-20014, Turku, Finland
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5
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Mattos BD, Zhu Y, Tardy BL, Beaumont M, Ribeiro ACR, Missio AL, Otoni CG, Rojas OJ. Versatile Assembly of Metal-Phenolic Network Foams Enabled by Tannin-Cellulose Nanofibers. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2023; 35:e2209685. [PMID: 36734159 DOI: 10.1002/adma.202209685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2022] [Revised: 01/31/2023] [Indexed: 06/18/2023]
Abstract
Metal-phenolic network (MPN) foams are prepared using colloidal suspensions of tannin-containing cellulose nanofibers (CNFs) that are ice-templated and thawed in ethanolic media in the presence of metal nitrates. The MPN facilitates the formation of solid foams by air drying, given the strength and self-supporting nature of the obtained tannin-cellulose nanohybrid structures. The porous characteristics and (dry and wet) compression strength of the foams are rationalized by the development of secondary, cohesive metal-phenolic layers combined with a hydrogen bonding network involving the CNF. The shrinkage of the MPN foams is as low as 6% for samples prepared with 2.5-10% tannic acid (or condensed tannin at 2.5%) with respect to CNF content. The strength of the MPN foams reaches a maximum at 10% tannic acid (using Fe(III) ions), equivalent to a compressive strength 70% higher than that produced with tannin-free CNF foams. Overall, a straightforward framework is introduced to synthesize MPN foams whose physical and mechanical properties are tailored by the presence of tannins as well as the metal ion species that enable the metal-phenolic networking. Depending on the metal ion, the foams are amenable to modification according to the desired application.
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Affiliation(s)
- Bruno D Mattos
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, Vuorimiehentie 1, FI-00076, Espoo, Finland
- Technological Development Center, Materials Science and Engineering (PPGCEM), Federal University of Pelotas (UFPel), Gomes Carneiro 1, Pelotas, RS, 96010-610, Brazil
| | - Ya Zhu
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, Vuorimiehentie 1, FI-00076, Espoo, Finland
| | - Blaise L Tardy
- Department of Chemical Engineering, Research and Innovation Center on CO2 and Hydrogen, Center for Membrane and Advanced Water Technology, Khalifa University of Science and Technology, P.O. Box 127788, Abu Dhabi, United Arab Emirates
| | - Marco Beaumont
- Department of Chemistry, Institute of Chemistry of Renewable Resources, University of Natural Resources and Life Sciences, Konrad-Lorenz-Str. 24, 3430, Tulln, Austria
| | - Ana Carolina R Ribeiro
- Technological Development Center, Materials Science and Engineering (PPGCEM), Federal University of Pelotas (UFPel), Gomes Carneiro 1, Pelotas, RS, 96010-610, Brazil
| | - André L Missio
- Technological Development Center, Materials Science and Engineering (PPGCEM), Federal University of Pelotas (UFPel), Gomes Carneiro 1, Pelotas, RS, 96010-610, Brazil
| | - Caio G Otoni
- Department of Materials Engineering (DEMa), Federal University of São Carlos (UFSCar), Rod. Washington Luís km 235, São Carlos, SP, 13565-905, Brazil
| | - Orlando J Rojas
- Department of Bioproducts and Biosystems, School of Chemical Engineering, Aalto University, Vuorimiehentie 1, FI-00076, Espoo, Finland
- Bioproducts Institute, Department of Chemical and Biological Engineering, Department of Chemistry and Department of Wood Science, University of British Columbia, Vancouver, British Columbia, V6T 1Z4, Canada
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6
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Sun X, Li S, Xiong Y, You Y. Flocculation performance and evaluation of a sulfur-containing tannin flocculant for Cu2+ removal. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.122277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/07/2022]
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7
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Osipov DO, Matys VY, Nemashkalov VA, Rozhkova AM, Shashkov IA, Satrutdinov AD, Kondratyeva EG, Sinitsyn AP. Cloning, Isolation, and Properties of a New Recombinant Tannase from the Aspergillus niger Fungus. APPL BIOCHEM MICRO+ 2022. [DOI: 10.1134/s000368382209006x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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8
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Yang Z, Hou J, Pan Z, Wu M, Zhang M, Wu J, Miao L. A innovative stepwise strategy using magnetic Fe 3O 4-co-graft tannin/polyethyleneimine composites in a coupled process of sulfate radical-advanced oxidation processes to control harmful algal blooms. JOURNAL OF HAZARDOUS MATERIALS 2022; 439:129485. [PMID: 35868085 DOI: 10.1016/j.jhazmat.2022.129485] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/01/2022] [Revised: 06/15/2022] [Accepted: 06/26/2022] [Indexed: 06/15/2023]
Abstract
A novel co-graft tannin and polyethyleneimine co-coating magnetic composite (TP@Fe3O4) was prepared in the study. On this premise, an unique stepwise efficient strategy based on magnetic flocculation and Sulfate radical (SO4•-)-advanced oxidation processes (S-AOPs) for eliminating Microcystis aeruginosa (M. aeruginosa) and algal organic matters (AOMs) was presented. Due to the high positive charge of TP@Fe3O4, a > 99 % high algae removal rate was obtained at a modest TP@Fe3O4 dosage of 100 mg/L at pH = 8.0 with a short separation time of 5 min. Further, peroxymonosulfate (PMS) treatment was employed as a pre-oxidation method to lower cell stability and promote M. aeruginosa removal by subsequent TP@Fe3O4 flocculation. The PMS/TP@Fe3O4 system successfully cuts the optimum dose of TP@Fe3O4 in half (50 mg/L) without causing obvious cell damage. Following algal fast magnetic separation, ultraviolet (UV) was introduced to activate PMS to totally degrade AOM and microcystin. Response surface methodology (RSM) demonstrated that UV/PMS oxidation removed > 80 % of DOC and > 94 % of microcystin under optimal conditions. SO4•- was the main radical species that aided in the elimination of AOM. This is the first study to use magnetic flocculation in conjunction with AOPs to mitigate harmful algal blooms, which can enable the non-destructive eradication of M. aeruginosa while also efficiently degrading AOMs.
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Affiliation(s)
- Zijun Yang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Jun Hou
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China.
| | - Zhengguo Pan
- Wuxi Delinhai Environmental Protection Technology Co., Ltd, China
| | - Miao Wu
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Mingzhi Zhang
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Jun Wu
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
| | - Lingzhan Miao
- Key Laboratory of Integrated Regulation and Resources Development on Shallow Lakes of Ministry of Education, College of Environment, Hohai University, Nanjing 210098, China
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9
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Uushona T, Chikwanha O, Katiyatiya C, Tayengwa T, Strydom P, Mapiye C. Ruminant meat production and quality enhancement, nematode suppression and greenhouse gas emission mitigation: A sustainable paradigm for valorisation of Acacia leaves. Anim Feed Sci Technol 2022. [DOI: 10.1016/j.anifeedsci.2021.115187] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
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10
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Panzella L, Napolitano A. Condensed Tannins, a Viable Solution To Meet the Need for Sustainable and Effective Multifunctionality in Food Packaging: Structure, Sources, and Properties. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:751-758. [PMID: 35029982 PMCID: PMC8796238 DOI: 10.1021/acs.jafc.1c07229] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Revised: 12/29/2021] [Accepted: 01/05/2022] [Indexed: 05/21/2023]
Abstract
Condensed tannins (CT) have been the focus of increasing interest in the last years as a result of their potent biological properties, which have prompted their use in the food and feed sector as functional ingredients. The possible exploitation of these compounds as multifunctional additives for the implementation of active food packaging has also been recently appreciated. In this perspective, an overview of the structural features, accessible sources, methods of analysis, and functional properties of CT is provided, with the aim of critically emphasizing the opportunities offered by this widespread class of natural phenolic compounds for the rational design of multifunctional and sustainable food packaging materials.
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11
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Koopmann AK, Torres-Rodríguez J, Salihovic M, Schoiber J, Musso M, Fritz-Popovski G, Huesing N, Elsaesser MS. Tannin-Based Nanoscale Carbon Spherogels as Electrodes for Electrochemical Applications. ACS APPLIED NANO MATERIALS 2021; 4:14115-14125. [PMID: 34977479 PMCID: PMC8713360 DOI: 10.1021/acsanm.1c03431] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Accepted: 11/19/2021] [Indexed: 05/04/2023]
Abstract
A promising route to monolithic, hollow sphere carbon assemblies based on sustainable precursors with a tailored nanostructure is presented. These carbon assemblies, recently termed carbon spherogels, are generated via a polystyrene sphere template-based sol-gel process of mimosa tannin and biomass-derived 5-(hydroxymethyl)furfural. By completely replacing petroleum-based precursors (especially toxic formaldehyde) highly porous, nanoscale carbon monoliths are obtained, which are investigated as state-of-the-art, sustainable electrode materials for energy storage. This study defines the required synthesis parameters, in particular the highly acidic initial pH and a tannin/water ratio of at least 0.05 or lower, for a successful and homogeneous generation of these biobased carbon spherogels.
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Affiliation(s)
- Ann-Kathrin Koopmann
- Department
of Chemistry and Physics of Materials, Paris-Lodron-University
of Salzburg, 5020 Salzburg, Austria
- Salzburg
Center for Smart Materials, 5020 Salzburg, Austria
| | - Jorge Torres-Rodríguez
- Department
of Chemistry and Physics of Materials, Paris-Lodron-University
of Salzburg, 5020 Salzburg, Austria
- Salzburg
Center for Smart Materials, 5020 Salzburg, Austria
| | - Miralem Salihovic
- Department
of Chemistry and Physics of Materials, Paris-Lodron-University
of Salzburg, 5020 Salzburg, Austria
| | - Juergen Schoiber
- Department
of Chemistry and Physics of Materials, Paris-Lodron-University
of Salzburg, 5020 Salzburg, Austria
| | - Maurizio Musso
- Department
of Chemistry and Physics of Materials, Paris-Lodron-University
of Salzburg, 5020 Salzburg, Austria
| | | | - Nicola Huesing
- Department
of Chemistry and Physics of Materials, Paris-Lodron-University
of Salzburg, 5020 Salzburg, Austria
- Salzburg
Center for Smart Materials, 5020 Salzburg, Austria
| | - Michael S. Elsaesser
- Department
of Chemistry and Physics of Materials, Paris-Lodron-University
of Salzburg, 5020 Salzburg, Austria
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12
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Xiao G, Yin Y, Zheng W, Dai M, Afewerki S, Chen A, Zhang J, Zhang Y, Zhang W, Zhang YS. Bi/Ti-phenolic network induced biomimetic synthesis of mesoporous hierarchical bimetallic hybrid nanocatalysts with enhanced visible-light photocatalytic performance. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2021.127518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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13
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Cerqueni G, Scalzone A, Licini C, Gentile P, Mattioli-Belmonte M. Insights into oxidative stress in bone tissue and novel challenges for biomaterials. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 130:112433. [PMID: 34702518 DOI: 10.1016/j.msec.2021.112433] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2021] [Revised: 09/08/2021] [Accepted: 09/11/2021] [Indexed: 12/28/2022]
Abstract
The presence of Reactive Oxygen Species (ROS) in bone can influence resident cells behaviour as well as the extra-cellular matrix composition and the tissue architecture. Aging, in addition to excessive overloads, unbalanced diet, smoking, predisposing genetic factors, lead to an increase of ROS and, if it is accompanied with an inappropriate production of scavengers, promotes the generation of oxidative stress that encourages bone catabolism. Furthermore, bone injuries can be triggered by numerous events such as road and sports accidents or tumour resection. Although bone tissue possesses a well-known repair and regeneration capacity, these mechanisms are inefficient in repairing large size defects and bone grafts are often necessary. ROS play a fundamental role in response after the implant introduction and can influence its success. This review provides insights on the mechanisms of oxidative stress generated by an implant in vivo and suitable ways for its modulation. The local delivery of active molecules, such as polyphenols, enhanced bone biomaterial integration evidencing that the management of the oxidative stress is a target for the effectiveness of an implant. Polyphenols have been widely used in medicine for cardiovascular, neurodegenerative, bone disorders and cancer, thanks to their antioxidant and anti-inflammatory properties. In addition, the perspective of new smart biomaterials and molecular medicine for the oxidative stress modulation in a programmable way, by the use of ROS responsive materials or by the targeting of selective molecular pathways involved in ROS generation, will be analysed and discussed critically.
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Affiliation(s)
- Giorgia Cerqueni
- Department of Clinical and Molecular Sciences (DISCLIMO), Università Politecnica delle Marche, Via Tronto 10/a, Ancona 60126, Italy
| | - Annachiara Scalzone
- School of Engineering, Newcastle University, Stephenson Building, Claremont Road, Newcastle upon Tyne NE1 7RU, UK
| | - Caterina Licini
- Department of Clinical and Molecular Sciences (DISCLIMO), Università Politecnica delle Marche, Via Tronto 10/a, Ancona 60126, Italy; Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi 204, 10129 Torino, Italy
| | - Piergiorgio Gentile
- School of Engineering, Newcastle University, Stephenson Building, Claremont Road, Newcastle upon Tyne NE1 7RU, UK
| | - Monica Mattioli-Belmonte
- Department of Clinical and Molecular Sciences (DISCLIMO), Università Politecnica delle Marche, Via Tronto 10/a, Ancona 60126, Italy.
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14
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Koopmann AK, Malfait WJ, Sepperer T, Huesing N. A Systematic Study on Bio-Based Hybrid Aerogels Made of Tannin and Silica. MATERIALS 2021; 14:ma14185231. [PMID: 34576455 PMCID: PMC8468457 DOI: 10.3390/ma14185231] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Revised: 09/07/2021] [Accepted: 09/09/2021] [Indexed: 11/18/2022]
Abstract
Tannin-silica hybrid materials are expected to feature excellent mechanic-chemical stability, large surface areas, high porosity and possess, after carbothermal reduction, high thermal stability as well as high thermal conductivity. Typically, a commercially available tetraethoxysilane is used, but in this study, a more sustainable route was developed by using a glycol-based silica precursor, tetrakis(2-hydroxyethyl)orthosilicate (EGMS), which is highly water-soluble. In order to produce highly porous, homogeneous hybrid tannin-silica aerogels in a one-pot approach, a suitable crosslinker has to be used. It was found that an aldehyde-functionalized silane (triethoxysilylbutyraldehyde) enables the covalent bonding of tannin and silica. Solely by altering the processing parameters, distinctly different tannin-silica hybrid material properties could be achieved. In particular, the amount of crosslinker is a significant factor with respect to altering the materials’ properties, e.g., the specific surface area. Notably, 5 wt% of crosslinker presents an optimal percentage to obtain a sustainable tannin-silica hybrid system with high specific surface areas of roughly 800–900 m2 g−1 as well as a high mesopore volume. The synthesized tannin-silica hybrid aerogels permit the usage as green precursor for silicon carbide materials.
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Affiliation(s)
- Ann-Kathrin Koopmann
- Department of Chemistry and Physics of Materials, Paris-Lodron University of Salzburg, 5020 Salzburg, Austria;
- Salzburg Center for Smart Materials, 5020 Salzburg, Austria;
| | - Wim J. Malfait
- Swiss Federal Laboratories for Materials Science and Technology, Empa, 8600 Dübendorf, Switzerland;
| | - Thomas Sepperer
- Salzburg Center for Smart Materials, 5020 Salzburg, Austria;
- Forest Products Technology and Timber Constructions, Salzburg University of Applied Sciences, 5431 Kuchl, Austria
| | - Nicola Huesing
- Department of Chemistry and Physics of Materials, Paris-Lodron University of Salzburg, 5020 Salzburg, Austria;
- Salzburg Center for Smart Materials, 5020 Salzburg, Austria;
- Correspondence: ; Tel.: +43-662-8044-6265
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15
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Zongo L, Lange H, Crestini C. Sulfited Tannin Capsules: Novel Stimuli-Responsive Delivery Systems. ACS OMEGA 2021; 6:13192-13203. [PMID: 34056469 PMCID: PMC8158821 DOI: 10.1021/acsomega.1c01065] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Accepted: 04/29/2021] [Indexed: 06/12/2023]
Abstract
Microcapsules of sulfited Acacia mearnsii tannin (AmST-MCs) were generated for the first time via the sonochemical method. Their stability profile was assessed and set in the general context of tannin microcapsules (TMCs) generated under the same experimental conditions. The analytical data gathered in this work indicate an excellent stability of TMCs over time as well as under high temperature and pressure, which is a major milestone toward the meaningful applications of TMCs in industrial, pharmaceutical, and biomedical applications in which sterilization of TMCs might be a prerequisite. Active release is shown to be efficiently triggered by varying pH and/or salinity, with different profiles for TMCs from sulfited and nonsulfited species. Surfactants also affect the stability of TMCs significantly, with effects eventually amplifiable by pH and the inherent kosmotropic and chaotropic characteristics of salt components in solutions.
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Affiliation(s)
- Luc Zongo
- Department
of Chemical Science and Technologies, University
of Rome “Tor Vergata”, Via della Ricerca Scientifica, Rome 00133, Italy
| | - Heiko Lange
- Department
of Earth and Environmental Sciences, University
of Milano-Bicocca, Piazza della Scienza 1, Milan 20126, Italy
- CSGI
− Center for Colloid and Surface Science, Via della Lastruccia 3, Sesto Fiorentino, Florence 50019, Italy
| | - Claudia Crestini
- CSGI
− Center for Colloid and Surface Science, Via della Lastruccia 3, Sesto Fiorentino, Florence 50019, Italy
- Department
of Molecular Science and Nanosystems, University
of Venice “Ca’ Foscari”, Via Torino 155, Venice Mestre 30170, Italy
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16
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Karonen M, Imran IB, Engström MT, Salminen JP. Characterization of Natural and Alkaline-Oxidized Proanthocyanidins in Plant Extracts by Ultrahigh-Resolution UHPLC-MS/MS. Molecules 2021; 26:molecules26071873. [PMID: 33810382 PMCID: PMC8037856 DOI: 10.3390/molecules26071873] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2021] [Revised: 03/19/2021] [Accepted: 03/22/2021] [Indexed: 11/16/2022] Open
Abstract
In this study, we analyzed the proanthocyanidin (PA) composition of 55 plant extracts before and after alkaline oxidation by ultrahigh-resolution UHPLC-MS/MS. We characterized the natural PA structures in detail and studied the sophisticated changes in the modified PA structures and the typical patterns and models of reactions within different PA classes due to the oxidation. The natural PAs were A- and B-type PCs, PDs and PC/PD mixtures. In addition, we detected galloylated PAs. B-type PCs in different plant extracts were rather stable and showed no or minor modification due to the alkaline oxidation. For some samples, we detected the intramolecular reactions of PCs producing A-type ether linkages. A-type PCs were also rather stable with no or minor modification, but in some plants, the formation of additional ether linkages was detected. PAs containing PD units were more reactive. After alkaline oxidation, these PAs or their oxidation products were no longer detected by MS even though a different type and/or delayed PA hump was still detected by UV at 280 nm. Galloylated PAs were rather stable under alkaline oxidation if they were PC-based, but we detected the intramolecular conversion from B-type to A-type. Galloylated PDs were more reactive and reacted similarly to nongalloylated PDs.
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17
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New network polymer functionalized magnetic-mesoporous nanoparticle for rapid adsorption of Hg(II) and sequential efficient reutilization as a catalyst. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2020.118112] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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18
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Sun X, Zhang J, You Y. Enhancement of Cu(II) removal by carbon disulfide modified black wattle tannin gel. Colloids Surf A Physicochem Eng Asp 2021. [DOI: 10.1016/j.colsurfa.2020.125594] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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19
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Abstract
This review critically addresses the most relevant and innovative techniques for obtaining polymers from tannins.
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Affiliation(s)
- Myleidi Vera
- Department of Polymer
- Faculty of Chemistry Science
- University of Concepción
- Concepción
- Chile
| | - Bruno F. Urbano
- Department of Polymer
- Faculty of Chemistry Science
- University of Concepción
- Concepción
- Chile
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20
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Kuzmin P, Bukharina I, Kuzmina A. Biochemical characteristics of urban maple trees. Saudi J Biol Sci 2020; 27:2912-2916. [PMID: 33100846 PMCID: PMC7569143 DOI: 10.1016/j.sjbs.2020.09.010] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Revised: 09/01/2020] [Accepted: 09/06/2020] [Indexed: 11/24/2022] Open
Abstract
The study, which covers the period between 2014 and 2018, was carried out in the city of Naberezhnye Chelny, Republic of Tatarstan, Russia. The aim of the study was to examine the biochemical response of maple trees growing in the anthropogenic environments. Leaf samples from 600 trees (Acer platanoides L. and Acer negundo L.) were collected at monthly intervals from June through August. Sampling was performed early in the morning (11 a.m.) in the middle of the month. The study offers statistical data on the tannin content, determined via permanganometry; the ascorbic acid concentration, found via titration with 2.6-dichlorophenolindophenol; the ascorbate oxidase activity determined by absorbance at 265 nm; and the polyphenol oxidase activity, found by the spectrophotometric method. Relatively higher ascorbate oxidase activity was detected in August among ash-leaved Acer platanoides L. and Acer negundo L. in areas with strong anthropogenic impact. Due to increased air pollution, maple trees were found to exhibit an increase of polyphenol oxidase activities. The condensed tannin content in Norway maple trees dropped over time: by 1.24 in July (avenue); by 0.94 (buffer area) and 0.76 (avenue) in August. The condensed tannin content in the ash-leaved maple trees also decreased: by 0.69 (buffer area) and 0.22 (avenue) in July; by 0.37 (buffer area) and 0.61(avenue) in August.
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Affiliation(s)
- Petr Kuzmin
- Department of Biology and Chemistry, Yelabuga Institute of Kazan Federal University, Kazan str., 89, Yelabuga 423600, Russian Federation
- Corresponding author: Kazan str., 89, Yelabuga 423600, Russian Federation.
| | - Irina Bukharina
- Institute of Civil Protection, Udmurt State University, Universitetskaya str., 1, Izhevsk 426069, Russian Federation
| | - Ajgul Kuzmina
- Department of Forest Management and Ecology, Izhevsk State Agricultural Academy, Student str., 11, Izhevsk 426069, Russian Federation
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21
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Technological Application of Tannin-Based Extracts. Molecules 2020; 25:molecules25030614. [PMID: 32019231 PMCID: PMC7037717 DOI: 10.3390/molecules25030614] [Citation(s) in RCA: 67] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2019] [Revised: 01/27/2020] [Accepted: 01/29/2020] [Indexed: 02/07/2023] Open
Abstract
Tannins are polyphenolic compounds naturally found in vegetables. Their presence in nature has prompted their historical use in many different ways. The revision of their traditional utilization has allowed their further modification aiming for an industrial application. Sometimes these modifications have implied the addition of harmful substances such as formaldehyde, classified as a carcinogen of category B1. In other cases, these natural tannins have been replaced by synthetic compounds that threaten human and animal health and damage the environment. Therefore, currently, both academy and industry are searching for the substitution of these unsafe complexes by the increasing inclusion of tannins, natural molecules that can be obtained from several and diverse renewable resources, modified using harmless additives. To achieve promising results, cost-efficient and eco-friendly extraction methods have been designed. Once these green alternatives have been isolated, they have been successfully applied to many fields with very assorted aims of utilization such as coagulants, adhesives, floatation agents, tannings, dyes, additives, or biomolecules. Therefore, this review offers a global vision of the full process that involves the tannin’s technological application including an overview of the most relevant tannin sources, effective extraction methods, and their utilization in very diverse fields.
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22
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Chen Z, Ye SY, Yang Y, Li ZY. A review on charred traditional Chinese herbs: carbonization to yield a haemostatic effect. PHARMACEUTICAL BIOLOGY 2019; 57:498-506. [PMID: 31401925 PMCID: PMC6713113 DOI: 10.1080/13880209.2019.1645700] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 07/09/2019] [Accepted: 07/15/2019] [Indexed: 05/23/2023]
Abstract
Context: Charcoal of Chinese drugs is a kind of special processing product in Chinese medicine and used for treatment of haemoptysis, hematemesis and haemorrhage in the clinic during ancient times. During carbonizing, significant changes occur in chemical constituents and the efficacy of haemostasis will be enhanced. But the quality control standard of 'carbonizing retains characteristics' should be followed. Objective: This review introduces the typical methods of carbonizing, which highlight current research progress on haemostatic substances of charcoal drugs so as to provide a reasonable explanation for the theory of haemostasis treated by charcoal medicine. Methods: English and Chinese literature from 2004 to 2019 was collected from databases including Web of Science, PubMed, Elsevier and CNKI (Chinese). Charcoal drug, chemical constituents, processing, haemostasis and carbon dots were used as the key words. Results: Charcoal drugs mainly play a haemostatic role and the effect can be classified into four types to stop bleeding: removing blood stasis, cooling blood, warming meridians and astringing. Changes in composition lead to changes in pharmacodynamics. Carbonizing methods and basic research on haemostasis material in charcoal drugs have also been summarized. Conclusions: This review summarizes the classification of charcoal drugs and highlights the possible material bases for the haemostatic effect of charcoal drugs in recent years, providing new insights to future research.
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Affiliation(s)
- Zhi Chen
- College of Pharmacy, Shandong University of TCM, Jinan, China
| | - Si-Yong Ye
- Department of Pharmacy, Jinan Second People's Hospital, Jinan, China
| | - Ying Yang
- College of Pharmacy, Shandong University of TCM, Jinan, China
| | - Zhong-Yuan Li
- College of Pharmacy, Shandong University of TCM, Jinan, China
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23
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Latos-Brozio M, Masek A. Structure-Activity Relationships Analysis of Monomeric and Polymeric Polyphenols (Quercetin, Rutin and Catechin) Obtained by Various Polymerization Methods. Chem Biodivers 2019; 16:e1900426. [PMID: 31657102 DOI: 10.1002/cbdv.201900426] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 10/25/2019] [Indexed: 01/07/2023]
Abstract
Plant polyphenols, especially flavonoids, are active and pro-health substances found in fruits and vegetables. Quercetin and its glycoside rutin are representatives of flavonoids, commonly found in plant products. Catechins found in large quantities in tea are also a well-known group of natural polyphenols. These compounds are based on the structure of flavan-3-ol, which is why the number, positions and types of substitutions affect the scavenging of radicals and other properties. Despite some inconsistent evidence, several structure-activity relationships of monomeric flavonoids are well established in vitro. However, the relationships between the activity and other properties of the polymeric forms of flavonoids and their structures are poorly understood so far. The aim of this article is to compare the data on polymerization of quercetin, rutin and catechin, as well as to systematize knowledge about the structure-activity relationship of the polymeric forms of these compounds.
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Affiliation(s)
- Malgorzata Latos-Brozio
- Lodz University of Technology, Faculty of Chemistry, Institute of Polymer and Dye Technology, 90-924, Lodz, Stefanowskiego 12/16, Poland
| | - Anna Masek
- Lodz University of Technology, Faculty of Chemistry, Institute of Polymer and Dye Technology, 90-924, Lodz, Stefanowskiego 12/16, Poland
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24
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Weiler FH, dos Santos Grasel F, Vescia Lourega R, da Silva Ramos A, Flôres Ferrão M. Simultaneous determination of sulfur, nitrogen and ash for vegetable tannins using ATR-FTIR spectroscopy and multivariate regression. Microchem J 2019. [DOI: 10.1016/j.microc.2019.103994] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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25
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Liao J, Brosse N, Pizzi A, Hoppe S, Xi X, Zhou X. Polypropylene Blend with Polyphenols through Dynamic Vulcanization: Mechanical, Rheological, Crystalline, Thermal, and UV Protective Property. Polymers (Basel) 2019; 11:polym11071108. [PMID: 31266153 PMCID: PMC6681417 DOI: 10.3390/polym11071108] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2019] [Revised: 05/29/2019] [Accepted: 06/03/2019] [Indexed: 12/04/2022] Open
Abstract
Tannin and lignin were blended with polypropylene (PP) through dynamic vulcanization technique. Their influence of mechanical property, crystallinity, thermal stability, as well as ultraviolet (UV) protection property on the PP matrix was investigated and compared with native tannin and lignin. According to our experimental results, tannin and lignin undergo dynamic vulcanization and were more compatible with the PP matrix. Besides, tannin and vulcanized tannin can perform as nucleating agents of PP because of their relatively small particle size. Moreover, vulcanized tannin/lignin have a better performance on the thermal stability of PP compared with native tannin/lignin, especially PP/vulcanized lignin blend. Furthermore, vulcanized tannin/lignin present better UV protective performance, concluded from fewer changes on surface morphology, carbonyl index, crystallinity, viscosity, and tensile property.
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Affiliation(s)
- Jingjing Liao
- LERMAB, University of Lorraine, Boulevard des Aiguillettes BP 70239, 54506 Vandœuvre-lès-Nancy, France
- Key Laboratory for Forest Resources Conservation and Utilisation in the Southwest Mountains of China (Southwest Forestry University), Ministry of Education, Kunming 650224, China
- LRGP, University of Lorraine, 1, Rue Grandville, BP 451, 54001 Nancy Cedex, France
| | - Nicolas Brosse
- LERMAB, University of Lorraine, Boulevard des Aiguillettes BP 70239, 54506 Vandœuvre-lès-Nancy, France.
| | - Antonio Pizzi
- LERMAB, University of Lorraine, Boulevard des Aiguillettes BP 70239, 54506 Vandœuvre-lès-Nancy, France
| | - Sandrine Hoppe
- LRGP, University of Lorraine, 1, Rue Grandville, BP 451, 54001 Nancy Cedex, France
| | - Xuedong Xi
- LERMAB, University of Lorraine, Boulevard des Aiguillettes BP 70239, 54506 Vandœuvre-lès-Nancy, France
| | - Xiaojian Zhou
- Key Laboratory for Forest Resources Conservation and Utilisation in the Southwest Mountains of China (Southwest Forestry University), Ministry of Education, Kunming 650224, China
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26
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Grasel FDS, Behrens MC, Strassburger D, Einloft S, Diz FM, Morrone FB, Wolf CR, Ligabue RA. SYNTHESIS, CHARACTERIZATION AND in vitro CYTOTOXICITY OF Acacia mearnsii PROANTHOCYANIDIN LOADED PLGA MICROPARTICLES. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2019. [DOI: 10.1590/0104-6632.20190361s20170154] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Fábio dos S. Grasel
- Pontifícia Universidade Católica do Rio Grande do Sul, Brasil; TANAC S/A, Brasil
| | | | | | - Sandra Einloft
- Pontifícia Universidade Católica do Rio Grande do Sul, Brasil; Pontifícia Universidade Católica do Rio Grande do Sul, Brasil
| | - Fernando M. Diz
- Pontifícia Universidade Católica do Rio Grande do Sul, Brasil
| | | | | | - Rosane A. Ligabue
- Pontifícia Universidade Católica do Rio Grande do Sul, Brasil; Pontifícia Universidade Católica do Rio Grande do Sul, Brasil
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27
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Liao J, Brosse N, Pizzi A, Hoppe S. Dynamically Cross-Linked Tannin as a Reinforcement of Polypropylene and UV Protection Properties. Polymers (Basel) 2019; 11:polym11010102. [PMID: 30960086 PMCID: PMC6401781 DOI: 10.3390/polym11010102] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 01/02/2019] [Accepted: 01/03/2019] [Indexed: 11/16/2022] Open
Abstract
Tannins were used as reinforcing components for polypropylene with anti-UV properties via dynamic curing extrusion. The influence of cross-linked tannins in different weight fraction and their anti-UV capacity on morphological, mechanical, rheological, crystallize and thermal properties were studied. The experimental results indicated that the cross-linked tannins improve Young's modulus, crystallinity, and thermal stability and reinforce the internal network of polypropylene. After UV accelerated weathering, polypropylene had fewer surface cracks, lower carbonyl index, fewer crystallinity decreases and less mechanical properties loss with increasing tannin content.
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Affiliation(s)
- Jingjing Liao
- LERMAB, University of Lorraine, Boulevard des Aiguillettes BP 70239, 54506 Vandœuvre-lès-Nancy, France.
- LRGP, University of Lorraine, 1, Rue Grandville, BP 451, 54001 Nancy CEDEX, France.
| | - Nicolas Brosse
- LERMAB, University of Lorraine, Boulevard des Aiguillettes BP 70239, 54506 Vandœuvre-lès-Nancy, France.
| | - Antonio Pizzi
- LERMAB, University of Lorraine, Boulevard des Aiguillettes BP 70239, 54506 Vandœuvre-lès-Nancy, France.
| | - Sandrine Hoppe
- LRGP, University of Lorraine, 1, Rue Grandville, BP 451, 54001 Nancy CEDEX, France.
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28
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Duval A, Avérous L. Solvent- and Halogen-Free Modification of Biobased Polyphenols to Introduce Vinyl Groups: Versatile Aromatic Building Blocks for Polymer Synthesis. CHEMSUSCHEM 2017; 10:1813-1822. [PMID: 28195674 DOI: 10.1002/cssc.201700066] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/13/2017] [Revised: 02/14/2017] [Indexed: 06/06/2023]
Abstract
Various biobased polyphenols (lignins and condensed tannins) were derivatized with vinyl ethylene carbonate, a functional cyclic carbonate, to obtain multifunctional aromatic polymers bearing vinyl groups. The reaction was optimized on a condensed tannin and soda lignin. In both cases, full conversion of the phenol groups was achieved in only 1 h at 150 °C without solvent and with K2 CO3 as a cheap and safe catalyst. This reaction was later applied to other condensed tannins and technical lignins (Kraft and organosolv), showing only little dependence on the chemical structure of the polyphenols. The obtained derivatives were thoroughly characterized by 1 H and 31 P NMR spectroscopy, FTIR spectroscopy, and size-exclusion chromatography. The developed method was compared with previously published protocols for the introduction of vinyl groups on lignin, and shows promising advances toward the modification of biobased polyphenols according to green chemistry principles. The obtained macromolecules show great potential as highly versatile biobased aromatic building blocks for the synthesis of polymers through, for example, radical, metathesis, or thiol-ene reactions.
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Affiliation(s)
- Antoine Duval
- BioTeam/ICPEES-ECPM, UMR 7515, Université de Strasbourg, 25 rue Becquerel, 67087, Strasbourg Cedex 2, France
| | - Luc Avérous
- BioTeam/ICPEES-ECPM, UMR 7515, Université de Strasbourg, 25 rue Becquerel, 67087, Strasbourg Cedex 2, France
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29
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García DE, Gavino J, Escobar D, Cancino RA. Maleinated polyflavonoids and lignin as functional additives for three kinds of thermoplastics. IRANIAN POLYMER JOURNAL 2017. [DOI: 10.1007/s13726-017-0519-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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30
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Oliver S, Hook JM, Boyer C. Versatile oligomers and polymers from flavonoids – a new approach to synthesis. Polym Chem 2017. [DOI: 10.1039/c7py00325k] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Antioxidant oligomers and polymers have been prepared from two flavonoids, catechin and quercetin, using a new facile technique.
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Affiliation(s)
- Susan Oliver
- Australian Centre for NanoMedicine (ACN)
- School of Chemical Engineering
- University of New South Wales
- Sydney
- Australia 2052
| | - James M. Hook
- NMR Facility
- Mark Wainwright Analytical Centre
- University of New South Wales
- Sydney
- Australia 2052
| | - Cyrille Boyer
- Australian Centre for NanoMedicine (ACN)
- School of Chemical Engineering
- University of New South Wales
- Sydney
- Australia 2052
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31
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Grasel FS, Marcelo MCA, Ferrão MF. A non-destructive, rapid and inexpensive methodology based on digital images for the classification of natural tannin extracts. RSC Adv 2016. [DOI: 10.1039/c6ra00900j] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In this study a methodology was developed for the identification and classification, by type of plant, of six commercial tannin extracts using multivariate analysis of digital images acquired through a commercial scanner.
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Affiliation(s)
- F. S. Grasel
- TANAC S/A
- Montenegro – RS
- Brazil
- Programa de Pós-graduação em Engenharia e Tecnologia de Materiais
- Pontifícia Universidade Católica do Rio Grande do Sul
| | - M. C. A. Marcelo
- Instituto de Química
- Universidade Federal do Rio Grande do Sul
- Porto Alegre – RS
- Brazil
| | - M. F. Ferrão
- Instituto de Química
- Universidade Federal do Rio Grande do Sul
- Porto Alegre – RS
- Brazil
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32
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Oliver S, Thomas DS, Kavallaris M, Vittorio O, Boyer C. Efficient functionalisation of dextran-aldehyde with catechin: potential applications in the treatment of cancer. Polym Chem 2016. [DOI: 10.1039/c6py00228e] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Dextran aldehyde was functionalised with up to 38 wt% catechin and the resulting conjugate demonstrated cytotoxic efficacy against neuroblastoma cells.
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Affiliation(s)
- Susan Oliver
- Australian Centre for NanoMedicine (ACN)
- School of Chemical Engineering
- University of New South Wales
- Sydney
- Australia 2052
| | - Donald S. Thomas
- Nuclear Magnetic Resonance Facility
- Mark Wainwright Analytical Centre
- University of New South Wales
- Sydney
- Australia 2052
| | - Maria Kavallaris
- Children's Cancer Institute Australia
- Lowy Cancer Research Centre
- University of New South Wales
- Sydney
- Australia 2052
| | - Orazio Vittorio
- Children's Cancer Institute Australia
- Lowy Cancer Research Centre
- University of New South Wales
- Sydney
- Australia 2052
| | - Cyrille Boyer
- Australian Centre for NanoMedicine (ACN)
- School of Chemical Engineering
- University of New South Wales
- Sydney
- Australia 2052
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