1
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Chen X, Chen Z, Duan R, Yan S, Li J. Formation mechanism of blue pigment in boiled lotus rhizome discs: Insight into the chelation of polyphenols and iron. Food Res Int 2024; 192:114818. [PMID: 39147513 DOI: 10.1016/j.foodres.2024.114818] [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: 05/05/2024] [Revised: 07/16/2024] [Accepted: 07/21/2024] [Indexed: 08/17/2024]
Abstract
Boiled lotus rhizome discs (BLRDs), as common processed products of lotus rhizome, have gained increasing attention from consumers and food manufacturers. However, the blue pigment formed during boiling affects its appearance and reduces the appetite of BLRDs. In this study, the effects of polyphenols and iron contents on blue pigment formation in BLRDs in different regions and months were investigated. Results revealed that blue variation was more serious in March and April of the second year in Wuhan, and polyphenols and iron contents in these two months were significantly higher than those in other months. Then, UPLC and UV-Vis analysis showed that polyphenols causing the formation of blue pigment in BLRDs were L-dopa, gallocatechin, catechin, epigallocatechin, chlorogenic acid and epicatechin, among which L-dopa (52.450 mg/100 g in fresh lotus rhizome (FLR)) and gallocatechin (36.210 mg/100 g in FLR) possessed the greatest effect. Moreover, the ESI-Q-TOF-MS analysis of L-dopa-iron chelate and gallocatechin-iron chelate suggested that the blue pigment of BLRDs was mainly in the form of bis-complexes under boiling conditions. The study on formation mechanism of blue pigment in BLRDs can provide a reference for lotus rhizome processing.
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Affiliation(s)
- Xianqiang Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Zhong Chen
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Ruibing Duan
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China
| | - Shoulei Yan
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Aquatic Vegetable Preservation and Processing Technology Engineering Center of Hubei Province, Wuhan 430070, China; Hubei Honghu Lotus Rhizome Industry Research Institute, Jingzhou 433299, China.
| | - Jie Li
- College of Food Science and Technology, Huazhong Agricultural University, Wuhan 430070, China; Aquatic Vegetable Preservation and Processing Technology Engineering Center of Hubei Province, Wuhan 430070, China
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2
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Jeong S, Kim SY, Myeong H, Lim EK, An SM, Liang H, Shrestha KK, Uddin MS, Kim Y, Yi PI, An BS, Seo S. Microbead-Based Colorimetric and Portable Sensors for Polyphenol Detection. ACS OMEGA 2024; 9:36531-36539. [PMID: 39220521 PMCID: PMC11359619 DOI: 10.1021/acsomega.4c04523] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 07/30/2024] [Accepted: 08/07/2024] [Indexed: 09/04/2024]
Abstract
Natural polyphenols found in health supplements and drinks have antioxidant and anti-inflammatory properties. In particular, to determine the beneficial qualities of antioxidant drinks and beverages, consumers demand precise quantification of the total amount of polyphenols as on-site detection. Herein, we developed a new concept of portable beads suitable for the field detection available: colorimetric quantification of polyphenols equipped with color converting software applications in a smartphone or tablet PC. The yellowish beads contain ferric ions to react with polyphenol to produce blackish metal-phenolic complexes. It is simple to perform the detection procedure: dipping the beads in the analytical sample and out-taking a photo-converting into RGB color values and quantification of the existed polyphenol. The overall process was completed within 5 min. Compared with the Folin-Ciocalteu assay, which is a representative optical sensor kit for total phenolic content, the bead-based sensor showed a better limit of detection of 0.0415 mM for tannic acid and comparable sensing capability for a polyphenol-containing plant extract and brewed tea. The beads conserved the shape and sensitivity after months of storage or under environmental interference such as a change in the temperature.
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Affiliation(s)
- Suhui Jeong
- Department
of Biomaterials Science (BK21 FOUR Program), College of Natural Resources
and Life Science/Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Republic of Korea
| | - So Young Kim
- Department
of Biomaterials Science (BK21 FOUR Program), College of Natural Resources
and Life Science/Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Republic of Korea
| | - Hwain Myeong
- Department
of Biomaterials Science (BK21 FOUR Program), College of Natural Resources
and Life Science/Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Republic of Korea
| | - Eun-Kyung Lim
- BioNanotechnology
Research Center, KRIBB, 125 Gwahak-ro, Yuseong-gu, Daejeon 34141, Republic of Korea
- Department
of Nanobiotechnology, KRIBB School of Biotechnology,
UST, 217 Gajeong-ro, Yuseong-gu, Daejeon 34113, Republic of Korea
- School
of Pharmacy, Sungkyunkwan University, Suwon, Gyeonggi-do 16419, Republic
of Korea
| | - Sung-Min An
- Division
of Endocrinology, Department of Internal Medicine, University of California Davis School of Medicine, Davis, California 95817, United States
| | - Huiling Liang
- Zhejiang
A&F University, Hangzhou 311300, Zhejiang, China
| | | | - Md Salah Uddin
- Ethnobotanical
Database of Bangladesh, Tejgaon, Dhaka 1208, Bangladesh
| | - Youngsuk Kim
- Department
of International Tea Industry and Culture, the Graduate School, Pusan National University, Miryang 50463, Republic of Korea
| | - Pyong-In Yi
- Department
of International Tea Industry and Culture, the Graduate School, Pusan National University, Miryang 50463, Republic of Korea
- Department
of Bioenvironmental Energy, College of Natural Resource and Life Science, Pusan National University, Miryang 50463, Republic of Korea
| | - Beum-Soo An
- Department
of Biomaterials Science (BK21 FOUR Program), College of Natural Resources
and Life Science/Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Republic of Korea
- Department
of International Tea Industry and Culture, the Graduate School, Pusan National University, Miryang 50463, Republic of Korea
| | - Sungbaek Seo
- Department
of Biomaterials Science (BK21 FOUR Program), College of Natural Resources
and Life Science/Life and Industry Convergence Research Institute, Pusan National University, Miryang 50463, Republic of Korea
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3
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Moslehi N, van Eekelen M, Velikov KP, Kegel WK. Ferrous Pyrophosphate and Mixed Divalent Pyrophosphates as Delivery Systems for Essential Minerals. ACS FOOD SCIENCE & TECHNOLOGY 2024; 4:1388-1401. [PMID: 38934009 PMCID: PMC11197097 DOI: 10.1021/acsfoodscitech.4c00050] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Revised: 05/19/2024] [Accepted: 05/28/2024] [Indexed: 06/28/2024]
Abstract
Poorly water-soluble iron-containing compounds are promising iron fortificants. However, ensuring high bioaccessibility and low reactivity of iron is challenging. We present the potential application of ferrous pyrophosphate (Fe(II)PP) and Fe(II)-containing M2(1-x)Fe2x P2O7 salts (0 < x < 1, M = Ca, Zn, or Mn) for delivery of iron and a second essential mineral (M). After preparation by a facile and environment-friendly coprecipitation method, the salts were investigated for their composition, pH-dependent dissolution, iron-mediated discoloration of a black tea solution, and oxidation of vitamin C. Our results suggest that these salts are possible dual-fortificants with tunable composition that compared to Fe(II)PP (i) show lower (<0.5 mM) and enhanced (to 5 mM) iron dissolution in moderate and gastric pH, respectively, (ii) exhibit less discoloration and dissolved iron in tea when x = 0.470 for M = Ca or Zn and x = 0.086 for M = Mn, and (iii) do not increase the oxidation extent of vitamin C over 48 h when x = 0.06, 0.086, or 0.053 for M = Ca, Zn, or Mn, respectively.
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Affiliation(s)
- Neshat Moslehi
- Van’t
Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute
for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Michiel van Eekelen
- Van’t
Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute
for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
| | - Krassimir P. Velikov
- Unilever
Innovation Centre Wageningen, Bronland 14, 6708 WH Wageningen, The Netherlands
- Soft
Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands
- Institute
of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
| | - Willem K. Kegel
- Van’t
Hoff Laboratory for Physical and Colloid Chemistry, Debye Institute
for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, The Netherlands
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4
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Cavalca LB, Atlason ÚÁ, Trofin A, Ribeiro CM, Pavan FR, Deuss PJ, Scheffers DJ. Selectivity and Activity of Benzene-1,2,4-triol and its Dimers as Antimicrobial Compounds Against Xanthomonas citri subsp. citri. Chempluschem 2024; 89:e202300616. [PMID: 38305754 DOI: 10.1002/cplu.202300616] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 02/02/2024] [Accepted: 02/02/2024] [Indexed: 02/03/2024]
Abstract
Citrus canker, caused by the bacterium Xanthomonas citri subsp. citri, is one of the main threats to citrus fruit production. Several phenolic compounds active against X. citri have been described in recent years. Benzene-1,2,4-triol is a bio-based phenolic compound that has shown high potential as a scaffold for the synthesis of new anti-X. citri compounds. However, benzene-1,2,4-triol is prone to oxidative dimerization. We evaluated the antibacterial activity of benzene-1,2,4-triol, its oxidized dimers, and analogous compounds. Benzene-1,2,4-triol has a low inhibitory concentration against X. citri (0.05 mM) and is also active against other bacterial species. Spontaneous formation of benzenetriol dimers (e. g. by contact with oxygen in aqueous solution) reduced the antimicrobial activity of benzenetriol solutions. Dimers themselves displayed lower antibacterial activity and where shown to be more stable in solution. Unlike many other phenolic compounds with anti-X. citri activity, benzene-1,2,4-triol does not act by membrane permeabilization, but seems to limit the availability of iron to cells. Benzene-1,2,4-triol is widely recognized as toxic - our results indicate that the toxicity of benzene-1,2,4-triol is largely due to spontaneously formed dimers. Stabilization of benzene-1,2,4-triol will be required to allow the safe use of this compound.
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Affiliation(s)
- Lúcia B Cavalca
- Department of Molecular Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, 9747 AG, Groningen, The Netherlands
- Department of Chemical Engineering, Engineering and Technology Institute Groningen, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Úlfur Á Atlason
- Department of Molecular Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, 9747 AG, Groningen, The Netherlands
| | - Alexandru Trofin
- Department of Chemical Engineering, Engineering and Technology Institute Groningen, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Camila M Ribeiro
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, 14800-903, Brazil
| | - Fernando R Pavan
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), Araraquara, 14800-903, Brazil
| | - Peter J Deuss
- Department of Chemical Engineering, Engineering and Technology Institute Groningen, University of Groningen, Nijenborgh 4, 9747 AG, Groningen, The Netherlands
| | - Dirk-Jan Scheffers
- Department of Molecular Microbiology, Groningen Biomolecular Sciences and Biotechnology Institute, University of Groningen, 9747 AG, Groningen, The Netherlands
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5
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Schröter C, Bangert LD, Börner HG. Enhancing Adhesion Properties of Commodity Polymers through Thiol-Catechol Connectivities: A Case Study on Polymerizing Polystyrene-Telechelics via Thiol-Quinone Michael-Polyaddition. ACS Macro Lett 2024; 13:440-445. [PMID: 38547376 PMCID: PMC11025132 DOI: 10.1021/acsmacrolett.4c00069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2024] [Revised: 03/13/2024] [Accepted: 03/14/2024] [Indexed: 04/17/2024]
Abstract
Segmented block copolymers with adhesive functionality bridges in between are synthesized through the combination of controlled radical polymerization (CRP) and thiol-quinone Michael-polyaddition. CRP provides a set of α,ω-dithiol polystyrenes (PS), which react as telechelics with a low molecular weight bisquinone, resulting in thiol-catechol connectivities (TCCs). By introducing as little as 3 mol % of TCC functionalities, the bonding of the polymer on dry and wet aluminum surfaces is significantly improved while keeping the integrity of the PS segments undisturbed to constitute favorable bulk properties. This improvement is evidenced by reaching up to 3.8 MPa adhesive strength, representing a 600% increase compared to nonfunctional PS.
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Affiliation(s)
- Carolin
M. Schröter
- Department
of Chemistry, Laboratory
for Organic Synthesis of Functional Systems, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany
| | - Lukas D. Bangert
- Department
of Chemistry, Laboratory
for Organic Synthesis of Functional Systems, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany
| | - Hans G. Börner
- Department
of Chemistry, Laboratory
for Organic Synthesis of Functional Systems, Humboldt-Universität zu Berlin, Unter den Linden 6, 10099 Berlin, Germany
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6
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Bui VKH, Nguyen XC, Truong HB, Hur J. Using CuMgFe layered double oxide to replace laccase as a catalyst for abiotic humification. CHEMOSPHERE 2024; 353:141647. [PMID: 38460843 DOI: 10.1016/j.chemosphere.2024.141647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 03/03/2024] [Accepted: 03/03/2024] [Indexed: 03/11/2024]
Abstract
Humification offers a promising avenue for sequestering dissolved organic carbon while facilitating environmental cleanup. In this study, CuMgFe layered double oxides (LDO) were applied as a catalyst to replace conventional enzymes, such as laccase, thereby enhancing the in vitro polyphenol-Maillard humification reaction. CuMgFe LDO was synthesized through calcination of CuMgFe layered double hydroxides (LDH) at 500 °C for 5 h. A suite of characterization methods confirmed the successful formation into mixed oxides (Cu2O, CuO, MgO, FeO, and Fe2O3) after thermal treatment. A rapid humification reaction was observed with CuMgFe LDO, occurring within a two-week span, likely due to a distinct synergy between copper and iron elements. Subsequent analyses identified that MgO in CuMgFe LDO also played a pivotal role in humification by stabilizing the pH of the reaction. In the absence of magnesium, LDO's humification activity was more pronounced in the early stages of the reaction, but it rapidly diminished as the reaction progressed. The efficiency of CuMgFe LDO was heightened at elevated temperatures (35 °C), while light conditions manifested a discernible effect, with a modest decrease in humification efficacy under indoor light exposure. CuMgFe LDO surpassed both laccase and MgFe LDH in performance, boasting a superior humification efficiency relative to its precursor, CuMgFe LDH. The catalysts' humification activity was modulated by their crystallinity and valence dynamics. Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) results suggested that introducing the amino acid, glycine, expedited the CuMgFe LDO-fueled humification, enhancing the formation of C-N and C-C bonds in the resultant products. The humic-like substances derived from the catalyst-enhanced reaction displayed an elevated presence of aromatic configurations and a richer array of oxygen functional groups in comparison to a typical commercial humic material.
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Affiliation(s)
- Vu Khac Hoang Bui
- Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea
| | - Xuan Cuong Nguyen
- Institute of Research and Development, Duy Tan University, Da Nang, 550000, Viet Nam; Faculty of Environmental Chemical Engineering, Duy Tan University, Da Nang, 550000, Viet Nam
| | - Hai Bang Truong
- Optical Materials Research Group, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City, Viet Nam; Faculty of Applied Technology, School of Technology, Van Lang University, Ho Chi Minh City, Viet Nam
| | - Jin Hur
- Department of Environment and Energy, Sejong University, Seoul, 05006, South Korea.
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7
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Pola L, Collado S, Wörner M, Hornung U, Díaz M. Valorisation of the residual aqueous phase from hydrothermally liquefied black liquor by persulphate-based advanced oxidation. CHEMOSPHERE 2023; 339:139737. [PMID: 37544524 DOI: 10.1016/j.chemosphere.2023.139737] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2023] [Revised: 07/18/2023] [Accepted: 08/03/2023] [Indexed: 08/08/2023]
Abstract
Hydrothermal liquefaction of Kraft black liquor is a promising method for the production of valuable organic chemicals. However, the separation of the biochar and biocrude leaves a residual aqueous phase in large volumes, which needs to be properly managed to make the process profitable. In this work, the persulphate-based advanced oxidation was assessed, for the first time ever, as a pretreatment of this aqueous phase to reduce its content of phenolic compounds and alcohols, which hinder further valorisation strategies. Results revealed that the phenolic compounds and the alcohols were oxidised in presence of low persulphate anion concentrations (<50 mM), mainly to quinone-like compounds and organic acids. At higher oxidant concentrations, these intermediates were subsequently oxidised to valuable acetic acid. When Fe (II) was added as the catalyst, low concentrations (<9 mM) enhanced the degradation of both phenolic compounds and alcohols due to the increase of the sulphate radicals, consequently reducing persulphate requirements for their removal. Nevertheless, higher Fe (II) doses produced the sequestration of sulphate radicals, thus decreasing the oxidation performance and generating undesired parallel reactions.
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Affiliation(s)
- Lucía Pola
- Department of Chemical and Environmental Engineering, University of Oviedo, 33071, Oviedo, Spain
| | - Sergio Collado
- Department of Chemical and Environmental Engineering, University of Oviedo, 33071, Oviedo, Spain
| | - Maximilian Wörner
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology (KIT), 76344, Eggestein-Leopoldshafen, Germany
| | - Ursel Hornung
- Institute of Catalysis Research and Technology (IKFT), Karlsruhe Institute of Technology (KIT), 76344, Eggestein-Leopoldshafen, Germany
| | - Mario Díaz
- Department of Chemical and Environmental Engineering, University of Oviedo, 33071, Oviedo, Spain.
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8
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Bideplán-Moyano C, Lo Fiego MJ, Calmels JJ, Alonso B, Radivoy G, Ruiz-Molina D, Mancebo-Aracil J, Nador F. Design and synthesis of unnatural coordination glycopolymer particles (CGPs): unleashing the potential of catechol-saccharide derivatives. RSC Adv 2023; 13:27491-27500. [PMID: 37711379 PMCID: PMC10499112 DOI: 10.1039/d3ra05316d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2023] [Accepted: 09/07/2023] [Indexed: 09/16/2023] Open
Abstract
Our study unveils an innovative methodology that merges catechols with mono- and disaccharides, yielding a diverse array of compounds. This strategic fusion achieves robust yields and introduces ligands with a dual nature: encompassing both the chelating attributes of catechols and the recognition capabilities of carbohydrates. This synergistic design led us to couple one of the novel ligands with an Fe(iii) salt, resulting in the creation of Coordination Glycopolymer Particles (CGPs). These CGPs demonstrate remarkable qualities, boasting outstanding dispersion in both aqueous media and Phosphate Buffered Saline (PBS) solution (pH ∼7.4) at higher concentrations (0.26 mg μL-1). Displaying an average Z-size of approximately 55 nm and favourable polydispersity indices (<0.25), these particles exhibit exceptional stability, maintaining their integrity over prolonged periods and temperature variations. Notably, they retain their superior dispersion and stability even when subjected to freezing or heating to 40 °C, making them exceptionally viable for driving biological assays. In contrast to established methods for synthesizing grafted glycopolymers, where typically a glycopolymer is doped with catechol derivatives to create synergy between chelating properties and those inherent to the saccharide, our approach provides a more efficient and versatile pathway for generating CGPs. This involves combining catechols and carbohydrates within a single molecule, enabling the fine-tuning of organic structure from a monomer design step and subsequently transferring these properties to the polymer.
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Affiliation(s)
- Celina Bideplán-Moyano
- Instituto de Química del Sur (INQUISUR-CONICET) - NANOSYN, Departamento de Química, Universidad Nacional del Sur (UNS) Av. Alem 1253, 8000 Bahía Blanca Buenos Aires Argentina
| | - Marcos J Lo Fiego
- Instituto de Química del Sur (INQUISUR-CONICET) - GIQOS. Departamento de Química, Universidad Nacional del Sur (UNS) Av. Alem 1253, 8000 Bahía Blanca Buenos Aires Argentina
| | - Juan José Calmels
- Instituto de Química del Sur (INQUISUR-CONICET) - NANOSYN, Departamento de Química, Universidad Nacional del Sur (UNS) Av. Alem 1253, 8000 Bahía Blanca Buenos Aires Argentina
| | - Belén Alonso
- Instituto de Química del Sur (INQUISUR-CONICET) - NANOSYN, Departamento de Química, Universidad Nacional del Sur (UNS) Av. Alem 1253, 8000 Bahía Blanca Buenos Aires Argentina
| | - Gabriel Radivoy
- Instituto de Química del Sur (INQUISUR-CONICET) - NANOSYN, Departamento de Química, Universidad Nacional del Sur (UNS) Av. Alem 1253, 8000 Bahía Blanca Buenos Aires Argentina
| | - Daniel Ruiz-Molina
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology (BIST) Campus UAB Bellaterra 08193 Barcelona Spain
| | - Juan Mancebo-Aracil
- Instituto de Química del Sur (INQUISUR-CONICET) - NANOSYN, Departamento de Química, Universidad Nacional del Sur (UNS) Av. Alem 1253, 8000 Bahía Blanca Buenos Aires Argentina
| | - Fabiana Nador
- Instituto de Química del Sur (INQUISUR-CONICET) - NANOSYN, Departamento de Química, Universidad Nacional del Sur (UNS) Av. Alem 1253, 8000 Bahía Blanca Buenos Aires Argentina
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9
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Mondal AK, Uddin MT, Sujan SMA, Tang Z, Alemu D, Begum HA, Li J, Huang F, Ni Y. Preparation of lignin-based hydrogels, their properties and applications. Int J Biol Macromol 2023; 245:125580. [PMID: 37379941 DOI: 10.1016/j.ijbiomac.2023.125580] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 06/12/2023] [Accepted: 06/24/2023] [Indexed: 06/30/2023]
Abstract
Polymers obtained from biomass are a concerning alternative to petro-based polymers because of their low cost of manufacturing, biocompatibility, ecofriendly and biodegradability. Lignin as the second richest and the only polyaromatics bio-polymer in plant which has been most studied for the numerous applications in different fields. But, in the past decade, the exploitation of lignin for the preparation of new smart materials with improved properties has been broadly sought, because lignin valorization plays one of the primary challenging issues of the pulp and paper industry and lignocellulosic biorefinery. Although, well suited chemical structure of lignin comprises of many functional hydrophilic and active groups, such as phenolic hydroxyls, carboxyls and methoxyls, which provides a great potential to be applied in the preparation of biodegradable hydrogels. In this review, lignin hydrogel is covered with preparation strategies, properties and applications. This review reports some important properties, such as mechanical, adhesive, self-healing, conductive, antibacterial and antifreezing properties were then discussed. Furthermore, herein also reviewed the current applications of lignin hydrogel, including dye adsorption, smart materials for stimuli sensitive, wearable electronics for biomedical applications and flexible supercapacitors. Overall, this review covers recent progresses regarding lignin-based hydrogel and constitutes a timely review of this promising material.
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Affiliation(s)
- Ajoy Kanti Mondal
- Leather Research Institute, Bangladesh Council of Scientific and Industrial Research, Savar, Dhaka 1350, Bangladesh.
| | - Md Tushar Uddin
- Leather Research Institute, Bangladesh Council of Scientific and Industrial Research, Savar, Dhaka 1350, Bangladesh
| | - S M A Sujan
- Leather Research Institute, Bangladesh Council of Scientific and Industrial Research, Savar, Dhaka 1350, Bangladesh
| | - Zuwu Tang
- School of Materials and Environmental Engineering, Fujian Polytechnic Normal University, No.1, Campus New Village, Longjiang Street, Fuzhou 350300, China
| | - Digafe Alemu
- College of Biological and Chemical Engineering, Department of Biotechnology, Addis Ababa Science and Technology University, Addis Ababa 16417, Ethiopia
| | - Hosne Ara Begum
- Department of Chemistry, University of Dhaka, Dhaka 1000, Bangladesh
| | - Jianguo Li
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, Fujian, China
| | - Fang Huang
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, Fujian, China
| | - Yonghao Ni
- Department of Chemical and Biomedical Engineering, University of Maine, Orono, ME 04469, USA
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10
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Bijlsma J, de Bruijn WJC, Koppelaar J, Sanders MG, Velikov KP, Vincken JP. Interactions of Natural Flavones with Iron Are Affected by 7- O-Glycosylation, but Not by Additional 6″- O-Acylation. ACS FOOD SCIENCE & TECHNOLOGY 2023; 3:1111-1121. [PMID: 37342238 PMCID: PMC10278068 DOI: 10.1021/acsfoodscitech.3c00112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/27/2023] [Revised: 04/04/2023] [Accepted: 04/17/2023] [Indexed: 06/22/2023]
Abstract
In iron-fortified bouillon, reactivity of the iron ion with (acylated) flavone glycosides from herbs can affect product color and bioavailability of iron. This study investigates the influence of 7-O-glycosylation and additional 6″-O-acetylation or 6″-O-malonylation of flavones on their interaction with iron. Nine (6″-O-acylated) flavone 7-O-apiosylglucosides were purified from celery (Apium graveolens), and their structures were elucidated by mass spectrometry (MS) and nuclear magnetic resonance (NMR). In the presence of iron, a bathochromic shift and darker color were observed for the 7-O-apiosylglucosides compared to the aglycon of flavones that only possess the 4-5 site. Thus, the ability of iron to coordinate to the flavone 4-5 site is increased by 7-O-glycosylation. For flavones with an additional 3'-4' site, less discoloration was observed for the 7-O-apiosylglucoside compared to the aglycon. Additional 6″-O-acylation did not affect the color. These findings indicate that model systems used to study discoloration in iron-fortified foods should also comprise (acylated) glycosides of flavonoids.
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Affiliation(s)
- Judith Bijlsma
- Laboratory
of Food Chemistry, Wageningen University
& Research, Bornse Weilanden 9, P.O. Box 17, 6700
AA Wageningen, The
Netherlands
| | - Wouter J. C. de Bruijn
- Laboratory
of Food Chemistry, Wageningen University
& Research, Bornse Weilanden 9, P.O. Box 17, 6700
AA Wageningen, The
Netherlands
| | - Jamie Koppelaar
- Laboratory
of Food Chemistry, Wageningen University
& Research, Bornse Weilanden 9, P.O. Box 17, 6700
AA Wageningen, The
Netherlands
| | - Mark G. Sanders
- Laboratory
of Food Chemistry, Wageningen University
& Research, Bornse Weilanden 9, P.O. Box 17, 6700
AA Wageningen, The
Netherlands
| | - Krassimir P. Velikov
- Unilever
Innovation Centre, Wageningen
B.V. Bronland 14, 6708 WH Wageningen, The Netherlands
- Institute
of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands
- Soft
Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands
| | - Jean-Paul Vincken
- Laboratory
of Food Chemistry, Wageningen University
& Research, Bornse Weilanden 9, P.O. Box 17, 6700
AA Wageningen, The
Netherlands
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11
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Bijlsma J, Moslehi N, Velikov KP, Kegel WK, Vincken JP, de Bruijn WJC. Reactivity of Fe(III)-containing pyrophosphate salts with phenolics: complexation, oxidation, and surface interaction. Food Chem 2023; 407:135156. [PMID: 36525808 DOI: 10.1016/j.foodchem.2022.135156] [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: 07/15/2022] [Revised: 11/16/2022] [Accepted: 12/03/2022] [Indexed: 12/12/2022]
Abstract
Mixed pyrophosphate salts with the general formula Ca2(1-x)Fe4x(P2O7)(1+2x) potentially possess less iron-phenolic reactivity compared to ferric pyrophosphate (FePP), due to decreased soluble Fe in the food-relevant pH range 3-7. We investigated reactivity (i.e., complexation, oxidation, and surface interaction) of FePP and mixed salts (with x = 0.14, 0.15, 0.18, and 0.35) in presence of structurally diverse phenolics. At pH 5-7, increased soluble iron from all salts was observed in presence of water-soluble phenolics. XPS confirmed that water-soluble phenolics solubilize iron after coordination at the salt surface, resulting in increased discoloration. However, color changes for mixed salts with x ≤ 0.18 remained acceptable for slightly water-soluble and insoluble phenolics. Furthermore, phenolic oxidation in presence of mixed salts was significantly reduced compared to FePP at pH 6. In conclusion, these mixed Ca-Fe(III) pyrophosphate salts with x ≤ 0.18 can potentially be used in designing iron-fortified foods containing slightly water-soluble and/or insoluble phenolics.
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Affiliation(s)
- Judith Bijlsma
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, P.O. Box 17, 6700 AA, Wageningen, the Netherlands.
| | - Neshat Moslehi
- Van 't Hoff Laboratory for Physical and Colloidal Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands.
| | - Krassimir P Velikov
- Unilever Innovation Centre Wageningen, Bronland 14, 6708 WH Wageningen, the Netherlands; Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, the Netherlands; Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, the Netherlands.
| | - Willem K Kegel
- Van 't Hoff Laboratory for Physical and Colloidal Chemistry, Debye Institute for Nanomaterials Science, Utrecht University, Padualaan 8, 3584 CH Utrecht, the Netherlands.
| | - Jean-Paul Vincken
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, P.O. Box 17, 6700 AA, Wageningen, the Netherlands.
| | - Wouter J C de Bruijn
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, P.O. Box 17, 6700 AA, Wageningen, the Netherlands.
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12
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Brudzynski K. Unexpected Value of Honey Color for Prediction of a Non-Enzymatic H 2O 2 Production and Honey Antibacterial Activity: A Perspective. Metabolites 2023; 13:metabo13040526. [PMID: 37110183 PMCID: PMC10141347 DOI: 10.3390/metabo13040526] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/28/2023] [Accepted: 03/30/2023] [Indexed: 04/29/2023] Open
Abstract
Hydrogen peroxide is the principal antibacterial compound of honey and its concentration determines honey bacteriostatic (MIC) and bactericidal (MBC) potencies. Levels of H2O2 produced are highly relevant to honey therapeutic potential, but they vary extensively among honey with reasons not immediately apparent. According to a traditional view, H2O2 is produced as a by-product of glucose oxidation by the honey bee enzyme, glucose oxidase; however, significant levels of H2O2 could be produced in a non-enzymatic way via polyphenol autooxidation. The aim of this study was to evaluate the potential for such an alternative pathway by re-examining evidence from many experimental and correlative studies in order to identify factors and compounds required for pro-oxidant activity. Unexpectedly, the color intensity was found to be the main indicator separating honey varieties based on the quantitative differences in the polyphenolic content, antioxidant activity and the content of transition metals, Fe, Cu and Mn, the main factors required for pro-oxidant effects. The color-impeding polyphenolics and their oxidation products (semiquinones and quinones) further contributed to color development through multiple chemical conjugations with proteins, phenolic oxidative polymerization, chelation or the reduction of metal ions. Moreover, quinones, as an intrinsic part of polyphenol redox activity, play an active role in the formation of higher-order structures, melanoidins and colloids in honey. The latter structures are also known to chelate metal ions, potentially contributing to H2O2 production. Thus, the color intensity appears as a major parameter that integrates polyphenol-dependent pro-oxidant reactions resulting in H2O2 generation.
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Affiliation(s)
- Katrina Brudzynski
- Department of Drug Discovery, Bee-Biomedicals Inc., St. Catharines, ON L2T 3T4, Canada
- Department of Biological Sciences, Formerly, Brock University, St. Catharines, ON L2S 3A1, Canada
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13
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Khongkliang P, Khemkhao M, Mahathanabodee S, O-Thong S, Kadier A, Phalakornkule C. Efficient removal of tannins from anaerobically-treated palm oil mill effluent using protein-tannin complexation in conjunction with electrocoagulation. CHEMOSPHERE 2023; 321:138086. [PMID: 36754310 DOI: 10.1016/j.chemosphere.2023.138086] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/26/2022] [Revised: 01/09/2023] [Accepted: 02/05/2023] [Indexed: 06/18/2023]
Abstract
Despite the significant removal of chemical oxygen demand (COD) by anaerobic digestion, anaerobically-treated palm oil mill effluent (POME) still contains tannins and other phenolic compounds, resulting in residual COD and a brownish color. In this study, we investigated the removal of tannins from anaerobically treated POME using protein-tannin complexation in conjunction with electrocoagulation. The amino acid composition of the protein, aqueous pH, and protein: tannin ratios were found to be important parameters affecting the tannin removal efficiency. Pig blood protein was superior to casein protein in removing tannins, possibly because it had aspartic acid as the major amino acid component. At an optimal condition with a pig blood protein: tannin ratio of 0.33 (w/w), a current density of 30 mA/cm2, pH 5, and an electrolysis time of 10 min, the removals of tannins, COD, and color were 93%, 96%, and 97%, respectively.
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Affiliation(s)
- Peerawat Khongkliang
- The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand; Research Center for Circular Products and Energy, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, Thailand
| | - Maneerat Khemkhao
- Rattanakosin College for Sustainable Energy and Environment, Rajamangala University of Technology Rattanakosin, Nakhon Pathom, 73170, Thailand; Microbial Informatics and Industrial Product of Microbe Research Center, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, Thailand
| | - Sithipong Mahathanabodee
- Department of Production Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, Thailand
| | - Sompong O-Thong
- International College, Thaksin University, Songkhla, 90000, Thailand
| | - Abudukeremu Kadier
- Laboratory of Environmental Science and Technology, The Xinjiang Technical Institute of Physics and Chemistry, Key Laboratory of Functional Materials and Devices for Special Environments, Chinese Academy of Sciences (CAS), Urumqi, 830011, Xinjiang, China; Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Chantaraporn Phalakornkule
- The Joint Graduate School of Energy and Environment, King Mongkut's University of Technology Thonburi, Bangkok, 10140, Thailand; Department of Chemical Engineering, Faculty of Engineering, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, Thailand; Research Center for Circular Products and Energy, King Mongkut's University of Technology North Bangkok, Bangkok, 10800, Thailand.
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14
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Nguyen DT, Han SY, Yun G, Lee H, Choi IS. Vortex-assisted, nanoarchitectonic manipulation of microparticles with flavonoid-Fe 3+ complex in biphasic water-oil systems. Chem Commun (Camb) 2023; 59:4612-4615. [PMID: 36987576 DOI: 10.1039/d3cc00812f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/30/2023]
Abstract
Coordination-driven self-assembly of metal-ligand complexes is a powerful nanoarchitectonic tool for particle engineering, but its usability is limited when using two immiscible coating components. This paper reports that simple vortexing of a biphasic system of Fe3+ ions in water and flavonoids in oil forms nanoshells on individual particles, thereby enabling the utilization of water-insoluble ligands as coating materials. Mechanistic studies suggest that the biphasic mass-transfer equilibrium of flavonoid-Fe3+ species controls the shell formation, with the oil phase acting as a reservoir of coating precursors for continuous coating. The versatility and convenience of our method expand the chemical toolbox for modulating particle-material interfaces.
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Affiliation(s)
| | | | - Gyeongwon Yun
- Department of Chemistry, KAIST, Daejeon 34141, Korea.
| | - Hojae Lee
- Department of Chemistry, Hallym University, Chuncheon 24252, Korea.
| | - Insung S Choi
- Department of Chemistry, KAIST, Daejeon 34141, Korea.
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15
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Shannon DP, Moon JD, Barney CW, Sinha NJ, Yang KC, Jones SD, Garcia RV, Helgeson ME, Segalman RA, Valentine MT, Hawker CJ. Modular Synthesis and Patterning of High-Stiffness Networks by Postpolymerization Functionalization with Iron–Catechol Complexes. Macromolecules 2023; 56:2268-2276. [PMID: 37013083 PMCID: PMC10064740 DOI: 10.1021/acs.macromol.2c02561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Revised: 02/15/2023] [Indexed: 03/17/2023]
Abstract
Bioinspired iron-catechol cross-links have shown remarkable success in increasing the mechanical properties of polymer networks, in part due to clustering of Fe3+-catechol domains which act as secondary network reinforcing sites. We report a versatile synthetic procedure to prepare modular PEG-acrylate networks with independently tunable covalent bis(acrylate) and supramolecular Fe3+-catechol cross-linking. Initial control of network structure is achieved through radical polymerization and cross-linking, followed by postpolymerization incorporation of catechol units via quantitative active ester chemistry and subsequent complexation with iron salts. By tuning the ratio of each building block, dual cross-linked networks reinforced by clustered iron-catechol domains are prepared and exhibit a wide range of properties (Young's moduli up to ∼245 MPa), well beyond the values achieved through purely covalent cross-linking. This stepwise approach to mixed covalent and metal-ligand cross-linked networks also permits local patterning of PEG-based films through masking techniques forming distinct hard, soft, and gradient regions.
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Affiliation(s)
- Declan P. Shannon
- Materials Department, University of California Santa Barbara, Santa Barbara, California 93106-5050, United States
- Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, California 93106-5121, United States
| | - Joshua D. Moon
- Materials Department, University of California Santa Barbara, Santa Barbara, California 93106-5050, United States
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106-5080, United States
| | - Christopher W. Barney
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106-5080, United States
- Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106-5070, United States
- Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, California 93106-5121, United States
| | - Nairiti J. Sinha
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106-5080, United States
- Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, California 93106-5121, United States
| | - Kai-Chieh Yang
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106-5080, United States
| | - Seamus D. Jones
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106-5080, United States
| | - Ronnie V. Garcia
- Department of Chemistry & Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106-9510, United States
| | - Matthew E. Helgeson
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106-5080, United States
- Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, California 93106-5121, United States
| | - Rachel A. Segalman
- Materials Department, University of California Santa Barbara, Santa Barbara, California 93106-5050, United States
- Department of Chemical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106-5080, United States
- Department of Chemistry & Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106-9510, United States
- Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, California 93106-5121, United States
| | - Megan T. Valentine
- Department of Mechanical Engineering, University of California, Santa Barbara, Santa Barbara, California 93106-5070, United States
- Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, California 93106-5121, United States
| | - Craig J. Hawker
- Materials Department, University of California Santa Barbara, Santa Barbara, California 93106-5050, United States
- Department of Chemistry & Biochemistry, University of California Santa Barbara, Santa Barbara, California 93106-9510, United States
- Materials Research Laboratory, University of California Santa Barbara, Santa Barbara, California 93106-5121, United States
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16
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Messersmith RE, Sage FC, Johnson JK, Langevin SA, Forsyth ER, Hart MT, Hoffman CM. Iron Sequestration by Galloyl-Silane Nano Coatings Inhibits Biofilm Formation of Sulfitobacter sp. Biomimetics (Basel) 2023; 8:biomimetics8010079. [PMID: 36810410 PMCID: PMC9944052 DOI: 10.3390/biomimetics8010079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2022] [Revised: 02/08/2023] [Accepted: 02/10/2023] [Indexed: 02/15/2023] Open
Abstract
Microbially-induced corrosion is the acceleration of corrosion induced by bacterial biofilms. The bacteria in the biofilms oxidize metals on the surface, especially evident with iron, to drive metabolic activity and reduce inorganic species such as nitrates and sulfates. Coatings that prevent the formation of these corrosion-inducing biofilms significantly increase the service life of submerged materials and significantly decrease maintenance costs. One species in particular, a member of the Roseobacter clade, Sulfitobacter sp., has demonstrated iron-dependent biofilm formation in marine environments. We have found that compounds that contain the galloyl moiety can prevent Sulfitobacter sp. biofilm formation by sequestering iron, thus making a surface unappealing for bacteria. Herein, we have fabricated surfaces with exposed galloyl groups to test the effectiveness of nutrient reduction in iron-rich media as a non-toxic method to reduce biofilm formation.
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Affiliation(s)
- Reid E. Messersmith
- Research and Exploratory Development Department, The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, USA
| | - F. Connor Sage
- Asymmetric Operations Sector, The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, USA
| | - James K. Johnson
- Asymmetric Operations Sector, The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, USA
| | - Spencer A. Langevin
- Research and Exploratory Development Department, The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, USA
| | - Ellen R. Forsyth
- Asymmetric Operations Sector, The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, USA
| | - Meaghan T. Hart
- Research and Exploratory Development Department, The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, USA
| | - Christopher M. Hoffman
- Research and Exploratory Development Department, The Johns Hopkins University Applied Physics Laboratory, 11100 Johns Hopkins Road, Laurel, MD 20723, USA
- Correspondence:
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17
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Caterino S, Pajer N, Crestini C. Iron-galls inks: preparation, structure and characterisation. Microchem J 2023. [DOI: 10.1016/j.microc.2022.108258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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18
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Li D, Xiong Q, Liu W, Liang L, Duan H. Nanozymatic magnetic nanomixers for enzyme immobilization and multiplexed detection of metabolic disease biomarkers. Biosens Bioelectron 2023; 219:114795. [PMID: 36272348 DOI: 10.1016/j.bios.2022.114795] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Revised: 10/01/2022] [Accepted: 10/07/2022] [Indexed: 11/07/2022]
Abstract
Nanozymes with enzyme-mimicking catalytic activity and unique functions have stimulated increasing interest in the biosensing field. Herein, we report a magnetic nanozyme (MNE) with integrated superior peroxidase-like activity and efficient mixing ability. This nanozymatic magnetic nanomixer is synthesized by depositing a Fe2+-doped polydopamine coating on the surface of well-aligned magnetic nanoparticles to form a rigid chain-like nanostructure. Polydopamine coating of the nanozymatic MNE allows for efficient immobilization of natural enzymes such as glucose oxidase, cholesterol oxidase or urate oxidase to produce a series of enzymes-immobilized MNE (MNE@enzymes) with intrinsic multienzyme cascade properties. These MNE@enzymes show synchronously rotating capability in spinning magnetic fields, which leads to an 80∼100% improvement in their overall catalytic efficiencies. In the on-chip detection of small molecular metabolites (i.e., glucose, cholesterol, and uric acid), the rotating MNE@enzymes lead to detection sensitivities 2.1∼4.3 times higher than those of the static ones. Importantly, the consistent performance of the rotating MNE@enzymes offers the possibility of integrating the detection of glucose, free cholesterol and uric acid into a single multiplexing microchip assay with smartphone readout, affording an improved sensitivity, good selectivity and reliability. The designed enzymes-loaded MNEs holds great promise in developing rapid and ultrasensitive measurements of diverse targets of healthcare concerns using portable devices.
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Affiliation(s)
- Di Li
- State Key Lab of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China; School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 70 Nanyang Drive, Singapore, 637457, Singapore; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China
| | - Qirong Xiong
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 70 Nanyang Drive, Singapore, 637457, Singapore
| | - Wylie Liu
- Raffles Institution, 1 Raffles Institution Lane, Singapore, 575954, Singapore
| | - Li Liang
- State Key Lab of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China; School of Food Science and Technology, Jiangnan University, Wuxi, Jiangsu, 214122, China.
| | - Hongwei Duan
- School of Chemistry, Chemical Engineering and Biotechnology, Nanyang Technological University, 70 Nanyang Drive, Singapore, 637457, Singapore.
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19
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Insights into the complexation and oxidation of quercetin and luteolin in aqueous solutions in presence of selected metal cations. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.120840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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20
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Lepinay SG, Nijveld R, Velikov KP, Shahidzadeh N. NaCl Crystals as Carriers for Micronutrient Delivery. ACS OMEGA 2022; 7:28955-28961. [PMID: 36033721 PMCID: PMC9404490 DOI: 10.1021/acsomega.2c02572] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 07/01/2022] [Indexed: 06/15/2023]
Abstract
Iron deficiency leading to anemia is one of the most severe and important nutritional deficiencies in the world today. To combat this deficiency, the fortification of food products with iron is a natural way to increase the global iron uptake. Here, we report a novel strategy for iron encapsulation in NaCl crystals via microscopic inclusions containing dissolved iron salt. The liquid inclusions embedded in the crystal insulate the reactive iron salts from their environment while assuring that iron is in a soluble and bioavailable form. While the size distribution of inclusions remains independent of the evaporation conditions, their density increases during crystallization at lower relative humidity. Using Raman confocal microspectroscopy, we have been able to analyze the morphology, length/thickness ratio, of inclusions and show that inclusions evolve toward a plate-like structure with the increase in size. By growing a pure NaCl shell around the iron-containing NaCl crystals, the stability of the composite crystals can be even further enhanced. The role of halite crystals as a carrier for iron fortification opens the way for the delivery of other types of micronutrients by including them in table salt.
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Affiliation(s)
- Simon
E. G. Lepinay
- Van
der Waals-Zeeman Institute (WZI), Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands
| | - Raymond Nijveld
- Nouryon
Specialty Chemicals, Zutphenseweg 10, 7418 AJ Deventer, The Netherlands
| | - Krassimir P. Velikov
- Van
der Waals-Zeeman Institute (WZI), Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands
- Unilever
Innovation Centre Wageningen, Bronland 14, 6708 WH Wageningen, The Netherlands
- Soft
Condensed Matter, Debye Institute of Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, The Netherlands
| | - Noushine Shahidzadeh
- Van
der Waals-Zeeman Institute (WZI), Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, Netherlands
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21
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Espina A, Cañamares MV, Jurašeková Z, Sanchez-Cortes S. Analysis of Iron Complexes of Tannic Acid and Other Related Polyphenols as Revealed by Spectroscopic Techniques: Implications in the Identification and Characterization of Iron Gall Inks in Historical Manuscripts. ACS OMEGA 2022; 7:27937-27949. [PMID: 35990485 PMCID: PMC9386834 DOI: 10.1021/acsomega.2c01679] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2022] [Accepted: 07/22/2022] [Indexed: 06/15/2023]
Abstract
In this work, a structural analysis of the polyphenol complexes with iron and copper at several conditions is reported. The investigated polyphenols were tannic acid, gallic acid, pyrogallol, and syringic acid, being components and molecular models of the gallnuts usually employed in the past in fabrication of iron gall inks (IGIs). Commercial tannic acid extracted from gallnuts, which is a complex mixture of different gallotannins and simpler galloylglucoses, was also employed in this analysis. This analysis comprised the use of Raman, Fourier-transform infrared (FTIR), UV-vis absorption, and fluorescence spectroscopy. The complexation of iron with these molecules leads to a strong change in color due to the deep restructuring of the polyphenol that can be clearly seen by Raman and FTIR spectra. Three main Raman bands appeared at 1450-1490 cm-1 (ν1), 1320-1345 cm-1 (ν2), and 400-650 cm-1 (ν3), which are characteristic of the metal complexes. The structural changes of the polyphenol complexes with iron were also investigated at different pHs and different polyphenol/iron stoichiometries. Other effects of the interaction of polyphenols with iron are the pH decrease of the mixture upon metal complexation and fluorescence quenching induced by the interaction of iron. This quenching is important since it facilitates the Raman inspection of manuscripts since polyphenols show a strong fluorescence emission that overlaps the Raman spectrum. Furthermore, DFT calculations were performed for the first time on the gallic acid complex with iron in order to elaborate a detailed assignment of the vibrational modes of polyphenols and their metal complexes, something that was missed in previous applications of Raman to IGIs.
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Affiliation(s)
- Alba Espina
- Department of Biophysics, Faculty of Science, P. J. Safarik University, Kosice 04154, Slovakia
| | | | - Zuzana Jurašeková
- Department of Biophysics, Faculty of Science, P. J. Safarik University, Kosice 04154, Slovakia
| | - Santiago Sanchez-Cortes
- Instituto de Estructura de la Materia (CSIC), Serrano, 121. Madrid 28006, Spain
- Center for Interdisciplinary Biosciences, Technology and Innovation Park, P. J. Safarik University, Kosice 04154, Slovakia
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22
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Bailly C. Anti-inflammatory and anticancer p-terphenyl derivatives from fungi of the genus Thelephora. Bioorg Med Chem 2022; 70:116935. [PMID: 35901638 DOI: 10.1016/j.bmc.2022.116935] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Revised: 06/22/2022] [Accepted: 07/11/2022] [Indexed: 02/08/2023]
Abstract
Fungi from the genus Thelephora have been exploited to identify bioactive compounds. The main natural products characterized are para-terphenyl derivatives, chiefly represented by the lead anti-inflammatory compound vialinin A isolated from species T. vialis and T. terrestris. Different series of p-terphenyls have been identified, including vialinins, ganbajunins, terrestrins, telephantins and other products. Their mechanism of action is not always clearly identified, and different potential molecule targets have been proposed. The lead vialinin A functions as a protease inhibitor, efficiently targeting ubiquitin-specific peptidases USP4/5 and sentrin-specific protease SENP1 which are prominent anti-inflammatory and anticancer targets. Protease inhibition is coupled with a powerful inhibition of the cellular production of tumor necrosis factor TNFα. Other mechanisms contributing to the anti-inflammatory or anti-proliferative action of these p-terphenyl compounds have been invoked, including the formation of cytotoxic copper complexes for derivatives bearing a catechol central unit such vialinin A, terrestrin B and telephantin O. These p-terphenyl compounds could be further exploited to design novel anticancer agents, as evidenced with the parent compound terphenyllin (essentially found in Aspergillus species) which has revealed marked antitumor and anti-metastatic effects in xenograft models of gastric and pancreatic cancer. This review shed light on the structural and functional diversity of p-terphenyls compounds isolated from Thelephora species, their molecular targets and pharmacological properties.
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Affiliation(s)
- Christian Bailly
- OncoWitan, Scientific Consulting Office, Lille (Wasquehal) 59290, France.
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23
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Non-Covalent Interaction on the Self-Healing of Mechanical Properties in Supramolecular Polymers. Int J Mol Sci 2022; 23:ijms23136902. [PMID: 35805906 PMCID: PMC9266855 DOI: 10.3390/ijms23136902] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 06/10/2022] [Accepted: 06/14/2022] [Indexed: 01/27/2023] Open
Abstract
Supramolecular polymers are widely utilized and applied in self-assembly or self-healing materials, which can be repaired when damaged. Normally, the healing process is classified into two types, including extrinsic and intrinsic self-healable materials. Therefore, the aim of this work is to review the intrinsic self-healing strategy based on supramolecular interaction or non-covalent interaction and molecular recognition to obtain the improvement of mechanical properties. In this review, we introduce the main background of non-covalent interaction, which consists of the metal–ligand coordination, hydrogen bonding, π–π interaction, electrostatic interaction, dipole–dipole interaction, and host–guest interactions, respectively. From the perspective of mechanical properties, these interactions act as transient crosslinking points to both prevent and repair the broken polymer chains. For material utilization in terms of self-healing products, this knowledge can be applied and developed to increase the lifetime of the products, causing rapid healing and reducing accidents and maintenance costs. Therefore, the self-healing materials using supramolecular polymers or non-covalent interaction provides a novel strategy to enhance the mechanical properties of materials causing the extended cycling lifetime of products before replacement with a new one.
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Moslehi N, Bijlsma J, de Bruijn WJ, Velikov KP, Vincken JP, Kegel WK. Design and characterization of Ca-Fe(III) pyrophosphate salts with tunable pH-dependent solubility for dual-fortification of foods. J Funct Foods 2022. [DOI: 10.1016/j.jff.2022.105066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
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Mishra AK, Hwang JH, Min JH, Park J, Lee E. Metal scavenging resin tethered with catechol or gallol binders via reversible addition–fragmentation chain transfer polymerisation. POLYMER 2022. [DOI: 10.1016/j.polymer.2022.124794] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Bijlsma J, de Bruijn WJC, Velikov KP, Vincken JP. Unravelling discolouration caused by iron-flavonoid interactions: Complexation, oxidation, and formation of networks. Food Chem 2022; 370:131292. [PMID: 34788954 DOI: 10.1016/j.foodchem.2021.131292] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 09/27/2021] [Accepted: 09/29/2021] [Indexed: 12/15/2022]
Abstract
Iron-flavonoid interactions in iron-fortified foods lead to undesirable discolouration. This study aimed to investigate iron-mediated complexation, oxidation, and resulting discolouration of flavonoids by spectrophotometric and mass spectrometric techniques. At pH 6.5, iron complexation to the 3-4 or 4-5 site instantly resulted in bathochromic shifting of the π → π* transition bands, and complexation to the 3'-4' site (i.e. catechol moiety) induced a π → dπ transition band. Over time, iron-mediated oxidative degradation and coupling reactions led to the formation of hydroxybenzoic acid derivatives and dehydrodimers, respectively resulting in a decrease or increase in discolouration. Additionally, we employed XRD, SEM, and TEM to reveal the formation of insoluble black metal-phenolic networks (MPNs). This integrated study on iron-mediated complexation and oxidation of flavonoids showed that the presence of the C2-C3 double bond in combination with the catechol moiety and either the 4-carbonyl or 3-hydroxyl increased the intensity of discolouration, extent of oxidation, and formation of MPNs.
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Affiliation(s)
- Judith Bijlsma
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, P.O. Box 17, 6700 AA Wageningen, the Netherlands
| | - Wouter J C de Bruijn
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, P.O. Box 17, 6700 AA Wageningen, the Netherlands
| | - Krassimir P Velikov
- Unilever Innovation Centre B.V. Bronland 14, 6708 WH Wageningen, the Netherlands; Institute of Physics, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, the Netherlands; Soft Condensed Matter, Debye Institute for Nanomaterials Science, Utrecht University, Princetonplein 5, 3584 CC Utrecht, the Netherlands
| | - Jean-Paul Vincken
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, P.O. Box 17, 6700 AA Wageningen, the Netherlands.
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Dabić D, Hanževački M, Škorić I, Žegura B, Ivanković K, Biošić M, Tolić K, Babić S. Photodegradation, toxicity and density functional theory study of pharmaceutical metoclopramide and its photoproducts. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 807:150694. [PMID: 34600991 DOI: 10.1016/j.scitotenv.2021.150694] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/06/2021] [Accepted: 09/26/2021] [Indexed: 06/13/2023]
Abstract
Pharmaceuticals as ubiquitous organic pollutants in the aquatic environment represent substances whose knowledge of environmental fate is still limited. One such compound is metoclopramide, whose direct and indirect photolysis and toxicological assessment have been studied for the first time in this study. Experiments were performed under solar radiation, showing metoclopramide as a compound that can easily degrade in different water matrices. The effect of pH-values showed the faster degradation at pH = 7, while the highly alkaline conditions at pH = 11 slowed photolysis. The highest value of quantum yield of metoclopramide photodegradation (ϕ = 43.55·10-4) was obtained at pH = 7. Various organic and inorganic substances (NO3-, Fe(III), HA, Cl-, Br-, HCO3-, SO42-), commonly present in natural water, inhibited the degradation by absorbing light. In all experiments, kinetics followed pseudo-first-order reaction with r2 greater than 0.98. The structures of the photolytic degradation products were tentatively identified, and degradation photoproducts were proposed. The hydroxylation of the aromatic ring and the amino group's dealkylation were two major photoproduct formation mechanisms. Calculated thermochemical quantities are in agreement with the experimentally observed stability of different photoproducts. Reactive sites in metoclopramide were studied with conceptual density functional theory and regions most susceptible to •OH attack were characterized. Metoclopramide and its degradation products were neither genotoxic for bacteria Salmonella typhimurium in the SOS/umuC assay nor acutely toxic for bacteria Vibrio fischeri.
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Affiliation(s)
- Dario Dabić
- Department of Analytical Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev Trg 19, Zagreb, Croatia.
| | - Marko Hanževački
- Department of Chemical and Environmental Engineering, University of Nottingham, Nottingham NG7 2RD, United Kingdom
| | - Irena Škorić
- Department of Organic Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev Trg 19, Zagreb, Croatia
| | - Bojana Žegura
- Department of Genetic Toxicology and Cancer Biology, National Institute of Biology, Večna pot 111, Ljubljana, Slovenia
| | - Klaudija Ivanković
- Division for Marine and Environmental Research, Ruđer Bošković Institute, Bijenička c. 54, 10000 Zagreb, Croatia
| | - Martina Biošić
- Department of Analytical Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev Trg 19, Zagreb, Croatia
| | - Kristina Tolić
- Department of Analytical Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev Trg 19, Zagreb, Croatia
| | - Sandra Babić
- Department of Analytical Chemistry, Faculty of Chemical Engineering and Technology, University of Zagreb, Marulićev Trg 19, Zagreb, Croatia
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Mondal AK, Xu D, Wu S, Zou Q, Huang F, Ni Y. Design of Fe 3+-Rich, High-Conductivity Lignin Hydrogels for Supercapacitor and Sensor Applications. Biomacromolecules 2022; 23:766-778. [PMID: 35049296 DOI: 10.1021/acs.biomac.1c01194] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Preparation of natural polymer-based highly conductive hydrogels with tunable mechanical properties for applications in flexible electronics is still challenging. Herein, we report a facile method to prepare lignin-based Fe3+-rich, high-conductivity hydrogels via the following two-step process: (1) lignin hydrogels are prepared by cross-linking sulfonated lignin with poly(ethylene glycol) diglycidyl ether (PEGDGE) and (2) Fe3+ ions are impregnated into the lignin hydrogel by simply soaking in FeCl3. Benefiting from Fe3+ ion complexation with catechol groups and other functional groups in lignin, the resultant hydrogels exhibit unique properties, such as high conductivity (as high as 6.69 S·m-1) and excellent mechanical and hydrophobic properties. As a strain sensor, the as-prepared lignin hydrogel shows high sensitivity when detecting various human motions. With the flow of moist air, the Fe3+-rich lignin hydrogel generates an output voltage of 162.8 mV. The assembled supercapacitor of the hydrogel electrolyte demonstrates a high specific capacitance of 301.8 F·g-1, with a maximum energy density of 26.73 Wh·kg-1, a power density of 2.38 kW·kg-1, and a capacitance retention of 94.1% after 10 000 consecutive charge-discharge cycles. These results support the conclusion that lignin-based Fe3+-rich, high-conductivity hydrogels have promising applications in different fields, including sensors and supercapacitors, rendering a new platform for the value-added utilization of lignin.
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Affiliation(s)
- Ajoy Kanti Mondal
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China.,Institute of Fuel Research and Development, Bangladesh Council of Scientific and Industrial Research, Dhaka 1205, Bangladesh
| | - Dezhong Xu
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China
| | - Shuai Wu
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China
| | - Qiuxia Zou
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China
| | - Fang Huang
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China
| | - Yonghao Ni
- College of Material Engineering, Fujian Agriculture and Forestry University, Fuzhou 350108, China.,Department of Chemical Engineering, University of New Brunswick, Fredericton E3B 5A3, Canada
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Hilgers R, Bijlsma J, Malacaria L, Vincken JP, Furia E, de Bruijn WJC. Transition metal cations catalyze 16O/ 18O exchange of catechol motifs with H 218O. Org Biomol Chem 2022; 20:9093-9097. [DOI: 10.1039/d2ob01884e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In the presence of Fe(iii) and several other cations, catechol motifs undergo rapid 16O/18O exchange with H218O under mild conditions. This opens up synthetic possibilities and may have implications for studies using H218O as a mechanistic probe.
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Affiliation(s)
- Roelant Hilgers
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands
| | - Judith Bijlsma
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands
| | - Luana Malacaria
- Dipartimento di Chimica e Tecnologie Chimiche, Via P. Bucci, Cubo 12/D, Università della Calabria, I-87030 Arcavacata di Rende (CS), Italy
| | - Jean-Paul Vincken
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands
| | - Emilia Furia
- Dipartimento di Chimica e Tecnologie Chimiche, Via P. Bucci, Cubo 12/D, Università della Calabria, I-87030 Arcavacata di Rende (CS), Italy
| | - Wouter J. C. de Bruijn
- Laboratory of Food Chemistry, Wageningen University & Research, Bornse Weilanden 9, 6708 WG Wageningen, The Netherlands
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Insights into the antibacterial mechanism of action of chelating agents by selective deprivation of iron, manganese and zinc. Appl Environ Microbiol 2021; 88:e0164121. [PMID: 34788072 PMCID: PMC8788741 DOI: 10.1128/aem.01641-21] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Bacterial growth and proliferation can be restricted by limiting the availability of metal ions in their environment. Humans sequester iron, manganese, and zinc to help prevent infection by pathogens, a system termed nutritional immunity. Commercially used chelants have high binding affinities with a variety of metal ions, which may lead to antibacterial properties that mimic these innate immune processes. However, the modes of action of many of these chelating agents in bacterial growth inhibition and their selectivity in metal deprivation in cellulo remain ill-defined. We address this shortcoming by examining the effect of 11 chelators on Escherichia coli growth and their impact on the cellular concentration of five metals. The following four distinct effects were uncovered: (i) no apparent alteration in metal composition, (ii) depletion of manganese alongside reductions in iron and zinc levels, (iii) reduced zinc levels with a modest reduction in manganese, and (iv) reduced iron levels coupled with elevated manganese. These effects do not correlate with the absolute known chelant metal ion affinities in solution; however, for at least five chelators for which key data are available, they can be explained by differences in the relative affinity of chelants for each metal ion. The results reveal significant insights into the mechanism of growth inhibition by chelants, highlighting their potential as antibacterials and as tools to probe how bacteria tolerate selective metal deprivation. IMPORTANCE Chelating agents are widely used in industry and consumer goods to control metal availability, with bacterial growth restriction as a secondary benefit for preservation. However, the antibacterial mechanism of action of chelants is largely unknown, particularly with respect to the impact on cellular metal concentrations. The work presented here uncovers distinct metal starvation effects imposed by different chelants on the model Gram-negative bacterium Escherichia coli. The chelators were studied both individually and in pairs, with the majority producing synergistic effects in combinations that maximize antibacterial hostility. The judicious selection of chelants based on contrasting cellular effects should enable reductions in the quantities of chelant required in numerous commercial products and presents opportunities to replace problematic chemistries with biodegradable alternatives.
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Phenol-Hyaluronic Acid Conjugates: Correlation of Oxidative Crosslinking Pathway and Adhesiveness. Polymers (Basel) 2021; 13:polym13183130. [PMID: 34578030 PMCID: PMC8470095 DOI: 10.3390/polym13183130] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/13/2021] [Accepted: 09/14/2021] [Indexed: 12/15/2022] Open
Abstract
Hyaluronic acid (HA) is a natural polysaccharide with great biocompatibility for a variety of biomedical applications, such as tissue scaffolds, dermal fillers, and drug-delivery carriers. Despite the medical impact of HA, its poor adhesiveness and short-term in vivo stability limit its therapeutic efficacy. To overcome these shortcomings, a versatile modification strategy for the HA backbone has been developed. This strategy involves tethering phenol moieties on HA to provide both robust adhesiveness and intermolecular cohesion and can be used for oxidative crosslinking of the polymeric chain. However, a lack of knowledge still exists regarding the interchangeable phenolic adhesion and cohesion depending on the type of oxidizing agent used. Here, we reveal the correlation between phenolic adhesion and cohesion upon gelation of two different HA–phenol conjugates, HA–tyramine and HA–catechol, depending on the oxidant. For covalent/non-covalent crosslinking of HA, oxidizing agents, horseradish peroxidase/hydrogen peroxide, chemical oxidants (e.g., base, sodium periodate), and metal ions, were utilized. As a result, HA–catechol showed stronger adhesion properties, whereas HA–tyramine showed higher cohesion properties. In addition, covalent bonds allowed better adhesion compared to that of non-covalent bonds. Our findings are promising for designing adhesive and mechanically robust biomaterials based on phenol chemistry.
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Ganguly R, Saha P, Banerjee SL, Pich A, Singha NK. Stimuli-Responsive Block Copolymer Micelles Based on Mussel-Inspired Metal-Coordinated Supramolecular Networks. Macromol Rapid Commun 2021; 42:e2100312. [PMID: 34347312 DOI: 10.1002/marc.202100312] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Revised: 07/16/2021] [Indexed: 12/21/2022]
Abstract
Amphiphilic diblock copolymers containing dopamine and zwitterions are synthesized via the RAFT polymerization method, which undergo temperature-mediated micellization in aqueous media. The presence of catechol moiety in dopamine is exploited to form pH-responsive cross-links with ferric ions (Fe3+ ) at different pH value. Herein, a comprehensive study of the effect of pH as well as temperature on the size and solution behavior of these cross-linked micelles is presented. These micelles cross-linked via metal-catechol coordination bonds can have several important biomedical applications such as degradable scaffolds for payload delivery.
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Affiliation(s)
- Ritabrata Ganguly
- Rubber Technology Centre, Indian Institute of Technology Kharagpur, 721302, India
| | - Pabitra Saha
- DWI - Leibniz-Institute for Interactive Materials, Aachen, 52074, Germany.,Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, 52074, Germany
| | - Sovan Lal Banerjee
- Rubber Technology Centre, Indian Institute of Technology Kharagpur, 721302, India
| | - Andrij Pich
- DWI - Leibniz-Institute for Interactive Materials, Aachen, 52074, Germany.,Institute of Technical and Macromolecular Chemistry, RWTH Aachen University, 52074, Germany.,Aachen Maastricht Institute for Biobased Materials (AMIBM), Maastricht University, 6167, The Netherlands
| | - Nikhil K Singha
- Rubber Technology Centre, Indian Institute of Technology Kharagpur, 721302, India.,School of Nanosciences and Technology, Indian Institute of Technology Kharagpur, 721302, India
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NAKAMURA Y, SATO Y, SHIDA N, ATOBE M. Electrochemical Trimerization of Catechol to 2,3,6,7,10,11-Hexahydroxytriphenylene Using a Flow Microreactor. ELECTROCHEMISTRY 2021. [DOI: 10.5796/electrochemistry.21-00053] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Yuto NAKAMURA
- Graduate School of Science and Engineering, Yokohama National University
| | | | - Naoki SHIDA
- Graduate School of Science and Engineering, Yokohama National University
| | - Mahito ATOBE
- Graduate School of Science and Engineering, Yokohama National University
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Moon JD, Sujanani R, Geng Z, Freeman BD, Segalman RA, Hawker CJ. Versatile Synthetic Platform for Polymer Membrane Libraries Using Functional Networks. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02414] [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]
Affiliation(s)
- Joshua D. Moon
- Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Rahul Sujanani
- John J. McKetta Jr. Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Zhishuai Geng
- Materials Department, University of California, Santa Barbara, California 93106, United States
| | - Benny D. Freeman
- John J. McKetta Jr. Department of Chemical Engineering, The University of Texas at Austin, Austin, Texas 78712, United States
| | - Rachel A. Segalman
- Materials Department, University of California, Santa Barbara, California 93106, United States
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, United States
| | - Craig J. Hawker
- Materials Department, University of California, Santa Barbara, California 93106, United States
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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