1
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Dinić A, Nikolić V, Nikolić L, Ilić-Stojanović S, Najman S, Urošević M, Gajić I. Modified Sulfanilamide Release from Intelligent Poly( N-isopropylacrylamide) Hydrogels. Pharmaceutics 2023; 15:1749. [PMID: 37376197 DOI: 10.3390/pharmaceutics15061749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Revised: 06/01/2023] [Accepted: 06/13/2023] [Indexed: 06/29/2023] Open
Abstract
The aim of this study was to examine homopolymeric poly(N-isopropylacrylamide), p(NIPAM), hydrogels cross-linked with ethylene glycol dimethacrylate as carriers for sulfanilamide. Using FTIR, XRD and SEM methods, structural characterization of synthesized hydrogels before and after sulfanilamide incorporation was performed. The residual reactants content was analyzed using the HPLC method. The swelling behavior of p(NIPAM) hydrogels of different crosslinking degrees was monitored in relation to the temperature and pH values of the surrounding medium. The effect of temperature, pH, and crosslinker content on the sulfanilamide release from hydrogels was also examined. The results of the FTIR, XRD, and SEM analysis showed that sulfanilamide is incorporated into the p(NIPAM) hydrogels. The swelling of p(NIPAM) hydrogels depended on the temperature and crosslinker content while pH had no significant effect. The sulfanilamide loading efficiency increased with increasing hydrogel crosslinking degree, ranging from 87.36% to 95.29%. The sulfanilamide release from hydrogels was consistent with the swelling results-the increase of crosslinker content reduced the amount of released sulfanilamide. After 24 h, 73.3-93.5% of incorporated sulfanilamide was released from the hydrogels. Considering the thermosensitivity of hydrogels, volume phase transition temperature close to the physiological temperature, and the satisfactory results achieved for sulfanilamide incorporation and release, it can be concluded that p(NIPAM) based hydrogels are promising carriers for sulfanilamide.
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Affiliation(s)
- Ana Dinić
- Faculty of Technology, University of Niš, Bulevar Oslobođenja 124, 16000 Leskovac, Serbia
| | - Vesna Nikolić
- Faculty of Technology, University of Niš, Bulevar Oslobođenja 124, 16000 Leskovac, Serbia
| | - Ljubiša Nikolić
- Faculty of Technology, University of Niš, Bulevar Oslobođenja 124, 16000 Leskovac, Serbia
| | | | - Stevo Najman
- Department of Biology and Human Genetics, Faculty of Medicine, University of Niš, Blvd. Dr Zorana Djindjica 81, 18108 Niš, Serbia
- Department for Cell and Tissue Engineering, Faculty of Medicine, University of Niš, Blvd. Dr Zorana Djindjica 81, 18108 Niš, Serbia
| | - Maja Urošević
- Faculty of Technology, University of Niš, Bulevar Oslobođenja 124, 16000 Leskovac, Serbia
| | - Ivana Gajić
- Faculty of Technology, University of Niš, Bulevar Oslobođenja 124, 16000 Leskovac, Serbia
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2
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Badria A, Hutchinson DJ, Sanz del Olmo N, Malkoch M. Acrylate‐free tough
3D
printable thiol‐ene thermosets and composites for biomedical applications. J Appl Polym Sci 2022. [DOI: 10.1002/app.53046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Adel Badria
- Department of Fibre and Polymer Technology KTH Royal Institute of Technology Stockholm Sweden
| | - Daniel J. Hutchinson
- Department of Fibre and Polymer Technology KTH Royal Institute of Technology Stockholm Sweden
| | - Natalia Sanz del Olmo
- Department of Fibre and Polymer Technology KTH Royal Institute of Technology Stockholm Sweden
| | - Michael Malkoch
- Department of Fibre and Polymer Technology KTH Royal Institute of Technology Stockholm Sweden
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3
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Czyżewski W, Jachimczyk J, Hoffman Z, Szymoniuk M, Litak J, Maciejewski M, Kura K, Rola R, Torres K. Low-Cost Cranioplasty—A Systematic Review of 3D Printing in Medicine. MATERIALS 2022; 15:ma15144731. [PMID: 35888198 PMCID: PMC9315853 DOI: 10.3390/ma15144731] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Revised: 06/20/2022] [Accepted: 07/02/2022] [Indexed: 11/22/2022]
Abstract
The high cost of biofabricated titanium mesh plates can make them out of reach for hospitals in low-income countries. To increase the availability of cranioplasty, the authors of this work investigated the production of polymer-based endoprostheses. Recently, cheap, popular desktop 3D printers have generated sufficient opportunities to provide patients with on-demand and on-site help. This study also examines the technologies of 3D printing, including SLM, SLS, FFF, DLP, and SLA. The authors focused their interest on the materials in fabrication, which include PLA, ABS, PET-G, PEEK, and PMMA. Three-dimensional printed prostheses are modeled using widely available CAD software with the help of patient-specific DICOM files. Even though the topic is insufficiently researched, it can be perceived as a relatively safe procedure with a minimal complication rate. There have also been some initial studies on the costs and legal regulations. Early case studies provide information on dozens of patients living with self-made prostheses and who are experiencing significant improvements in their quality of life. Budget 3D-printed endoprostheses are reliable and are reported to be significantly cheaper than the popular counterparts manufactured from polypropylene polyester.
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Affiliation(s)
- Wojciech Czyżewski
- Department of Didactics and Medical Simulation, Medical University of Lublin, 20-093 Lublin, Poland; (W.C.); (K.T.)
- Department of Neurosurgery and Pediatric Neurosurgery in Lublin, 20-090 Lublin, Poland; (J.L.); (K.K.); (R.R.)
| | - Jakub Jachimczyk
- Student Scientific Society, Medical University of Lublin, 20-059 Lublin, Poland;
| | - Zofia Hoffman
- Student Scientific Society, Medical University of Lublin, 20-059 Lublin, Poland;
- Correspondence:
| | - Michał Szymoniuk
- Student Scientific Association of Neurosurgery, Department of Neurosurgery and Pediatric Neurosurgery, Medical University of Lublin, 20-090 Lublin, Poland;
| | - Jakub Litak
- Department of Neurosurgery and Pediatric Neurosurgery in Lublin, 20-090 Lublin, Poland; (J.L.); (K.K.); (R.R.)
- Department of Clinical Immunology, Medical University of Lublin, 20-093 Lublin, Poland
| | - Marcin Maciejewski
- Department of Electronics and Information Technology, Faculty of Electrical Engineering and Computer Science, Lublin University of Technology, 20-618 Lublin, Poland;
| | - Krzysztof Kura
- Department of Neurosurgery and Pediatric Neurosurgery in Lublin, 20-090 Lublin, Poland; (J.L.); (K.K.); (R.R.)
| | - Radosław Rola
- Department of Neurosurgery and Pediatric Neurosurgery in Lublin, 20-090 Lublin, Poland; (J.L.); (K.K.); (R.R.)
| | - Kamil Torres
- Department of Didactics and Medical Simulation, Medical University of Lublin, 20-093 Lublin, Poland; (W.C.); (K.T.)
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4
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Zaidi SFA, Kim YA, Saeed A, Sarwar N, Lee NE, Yoon DH, Lim B, Lee JH. Tannic acid modified antifreezing gelatin organohydrogel for low modulus, high toughness, and sensitive flexible strain sensor. Int J Biol Macromol 2022; 209:1665-1675. [PMID: 35487373 DOI: 10.1016/j.ijbiomac.2022.04.099] [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: 02/03/2022] [Revised: 03/26/2022] [Accepted: 04/14/2022] [Indexed: 12/17/2022]
Abstract
Current hydrogel strain sensors have met assorted essential requirements of wearing comfort, mechanical toughness, and strain sensitivity. However, an increment in the toughness of a hydrogel usually leads to an increase in elastic moduli that could be unfavorable for wearing comfort. In addition, traits of biofriendly and sustainability require synthesis of the hydrogels from natural polymer-based networks. We propose a novel strategy to fabricate an ionic conductive organohydrogel from natural biological macromolecule "gelatin" and polyacid "tannic acid" to resolve these challenges. Tannic acid modified the structure of the gelatin network in the ionic conductive organohydrogels, that not only led to an increase in toughness accompanying a decrease in elastic moduli but also headed to higher strain sensitivity and tunability. The proposed methodology exhibited tunable tensile modulus from 27 to 13 kPa, tensile strength from 287 to 325 kPa, elongation at fracture from 510 to 620%, toughness from 500 to 550 kJ/m3, conductivity from 0.29 to 0.8 S/m, and strain sensitivity (GF = 1.4-6.5). Moreover, the proposed organohydrogel exhibited excellent freezing tolerance. This study provides a facile yet powerful strategy to tune the mechanical and electrical properties of organohydrogels which can be adapted to various wearable sensors.
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Affiliation(s)
- Syed Farrukh Alam Zaidi
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Department of Metallurgical and Materials Engineering, University of Engineering and Technology, Lahore 39161, Pakistan
| | - Yun Ah Kim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Aiman Saeed
- Department of Biomedical Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Nasir Sarwar
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Department of Textile Engineering, University of Engineering and Technology, Lahore (Faisalabad Campus) 38000, Pakistan
| | - Nae-Eung Lee
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Research Center for Advanced Materials Technology, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Dae Ho Yoon
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Byungkwon Lim
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea.
| | - Jung Heon Lee
- School of Advanced Materials Science and Engineering, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; SKKU Advanced Institute of Nanotechnology (SAINT), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Biomedical Institute for Convergence at SKKU (BICS), Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea; Research Center for Advanced Materials Technology, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea.
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5
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Constant E, King O, Weems AC. Bioderived 4D Printable Terpene Photopolymers from Limonene and β-Myrcene. Biomacromolecules 2022; 23:2342-2352. [PMID: 35608477 DOI: 10.1021/acs.biomac.2c00085] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Green manufacturing and reducing our cultural dependency on petrochemicals have been topics of growing interest in the past decade, particularly for three-dimensional (3D) printable photopolymers where often toxic solvents and reagents have been required. Here, a simple solvent-free, free-radical polymerization is utilized to homo- and copolymerize limonene and β-myrcene monomers to produce oligomeric photopolymers (Mn < 11 kDa) displaying Newtonian, low viscosities (∼10 Pa × s) suitable for thiol-ene photo-cross-linking, yielding photoset materials in a digital light processing (DLP)-type 3D printer. The resulting photosets display tunable thermomechanical properties (poly(limonene) displays elastic moduli exceeding 1 GPa) compared with previous works focusing on monomeric terpenes as well as four-dimensional (4D) shape memory behavior. The utility of such photopolymers for biomedical applications is briefly considered on the premise of the hydrophilic nature (measured by contact angle) as well as their cytocompatibility upon seeding films with macrophages. These terpene-derived, green 4D photopolymers are shown to have promising physical behaviors suitable for an array of manufacturing and 3D printing applications.
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Affiliation(s)
- Eric Constant
- Biomedical Engineering, Russ College of Engineering, Ohio University, Athens, Ohio 45701, United States
| | - Olivia King
- Molecular and Chemical Biology, Ohio University, Athens, Ohio 45701, United States
| | - Andrew C Weems
- Biomedical Engineering, Russ College of Engineering, Ohio University, Athens, Ohio 45701, United States.,Molecular and Chemical Biology, Ohio University, Athens, Ohio 45701, United States.,Department of Mechanical Engineering, Translational Biosciences, Orthopedic and Musculoskeletal Neurological Institute, Ohio University, Athens, Ohio 45701, United States
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6
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Brooks S, Constant E, King O, Weems AC. Stereochemistry and Stoichiometry in Aliphatic Polyester Photopolymers for 3D Printing Tailored Biomaterial Scaffolds. Polym Chem 2022. [DOI: 10.1039/d1py01405f] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Stereoselective aliphatic polyesters were synthesized through the ring opening copolymerization of cyclic anhydrides and epoxides using a tin catalyst to yield Mn ~ 10-13 kDa macromolecules (Đ < 1.6). Isomerization...
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7
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Merckle D, Constant E, Cartwright Z, Weems AC. Ring Opening Copolymerization of Four-Dimensional Printed Shape Memory Polyester Photopolymers Using Digital Light Processing. Macromolecules 2021. [DOI: 10.1021/acs.macromol.0c02401] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- David Merckle
- Translational Biosciences Program, Ohio University, Athens, Ohio 45701, United States
| | - Eric Constant
- Biomedical Engineering Program, Russ College of Engineering, Ohio University, Athens, Ohio 45701, United States
| | - Zachary Cartwright
- Department of Mechanical Engineering, Russ College of Engineering, Ohio University, Athens, Ohio 45701, United States
| | - Andrew C Weems
- Translational Biosciences Program, Ohio University, Athens, Ohio 45701, United States
- Biomedical Engineering Program, Russ College of Engineering, Ohio University, Athens, Ohio 45701, United States
- Department of Mechanical Engineering, Russ College of Engineering, Ohio University, Athens, Ohio 45701, United States
- Ohio Musculoskeletal and Neurological Institute, Health College of Medicine, Ohio University, Athens, Ohio 45701, United States
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8
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Gaytán I, Burelo M, Loza-Tavera H. Current status on the biodegradability of acrylic polymers: microorganisms, enzymes and metabolic pathways involved. Appl Microbiol Biotechnol 2021; 105:991-1006. [PMID: 33427930 PMCID: PMC7798386 DOI: 10.1007/s00253-020-11073-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2020] [Revised: 12/14/2020] [Accepted: 12/23/2020] [Indexed: 12/18/2022]
Abstract
Abstract Acrylic polymers (AP) are a diverse group of materials with broad applications, frequent use, and increasing demand. Some of the most used AP are polyacrylamide, polyacrylic acid, polymethyl methacrylates, and polyacrylonitrile. Although no information for the production of all AP types is published, data for the most used AP is around 9 MT/year, which gives an idea of the amount of waste that can be generated after products’ lifecycles. After its lifecycle ends, the fate of an AP product will depend on its chemical structure, the environmental setting where it was used, and the regulations for plastic waste management existing in the different countries. Even though recycling is the best fate for plastic polymer wastes, few AP can be recycled, and most of them end up in landfills. Because of the pollution crisis the planet is immersed, setting regulations and developing technological strategies for plastic waste management are urgent. In this regard, biotechnological approaches, where microbial activity is involved, could be attractive eco-friendly strategies. This mini-review describes the broad AP diversity, their properties and uses, and the factors affecting their biodegradability, underlining the importance of standardizing biodegradation quantification techniques. We also describe the enzymes and metabolic pathways that microorganisms display to attack AP chemical structure and predict some biochemical reactions that could account for quaternary carbon-containing AP biodegradation. Finally, we analyze strategies to increase AP biodegradability and stress the need for more studies on AP biodegradation and developing stricter legislation for AP use and waste control. Key points • Acrylic polymers (AP) are a diverse and extensively used group of compounds. • The environmental fates and health effects of AP waste are not completely known. • Microorganisms and enzymes involved in AP degradation have been identified. • More biodegradation studies are needed to develop AP biotechnological treatments. Supplementary Information The online version contains supplementary material available at 10.1007/s00253-020-11073-1.
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Affiliation(s)
- Itzel Gaytán
- Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de México, Ave. Universidad 3000. Col. UNAM., 04510, Mexico City, México
| | - Manuel Burelo
- Laboratorio de Química Sostenible, Departamento de Química Analítica, Facultad de Química, Universidad Nacional Autónoma de México, Ave. Universidad 3000. Col. UNAM., 04510, Mexico City, México
| | - Herminia Loza-Tavera
- Departamento de Bioquímica, Facultad de Química, Universidad Nacional Autónoma de México, Ave. Universidad 3000. Col. UNAM., 04510, Mexico City, México.
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9
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Wang L, Cavaco-Paulo A, Xu B, Martins M. Polymeric Hydrogel Coating for Modulating the Shape of Keratin Fiber. Front Chem 2019; 7:749. [PMID: 31824915 PMCID: PMC6879650 DOI: 10.3389/fchem.2019.00749] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Accepted: 10/21/2019] [Indexed: 01/26/2023] Open
Abstract
Hydrogel coating was explored to modulate the shape of keratin hair fiber. The motivation was the development of an eco-friendly methodology with non-toxic chemicals to modulate keratin fiber. Polymeric hydrogel of acrylic acid and N-N-dimethylacrylamide was prepared by free-radical polymerization in aqueous solution, using nano-alumina particles as crosslinker and potassium persulfate as an initiator. Physico-chemical properties of the hydrogel was investigated by Fourier transformer infrared spectrum (FTIR), thermal analysis and swelling ratio behavior. After hydrogel coating, morphological modification was observed from straight to curly hair effect. The influence of hydrogel coating on hair fiber was evaluated by perming efficiency supported by X-ray diffraction and morphological characterization (SEM and AFM). The durability of hydrogel coating was tested until four wash processes maintaining around 65% the new configuration of the hair fiber.
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Affiliation(s)
- Lanlan Wang
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi, China
| | - Artur Cavaco-Paulo
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi, China.,Centre of Biological Engineering (CEB), University of Minho, Braga, Portugal
| | - Bo Xu
- International Joint Research Laboratory for Textile and Fiber Bioprocesses, Jiangnan University, Wuxi, China.,Key Laboratory of Eco-Textiles, Ministry of Education, Jiangnan University, Wuxi, China
| | - Madalena Martins
- Centre of Biological Engineering (CEB), University of Minho, Braga, Portugal
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10
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Otoukesh M, Nerín C, Aznar M, Kabir A, Furton KG, Es'haghi Z. Determination of adhesive acrylates in recycled polyethylene terephthalate by fabric phase sorptive extraction coupled to ultra performance liquid chromatography - mass spectrometry. J Chromatogr A 2019; 1602:56-63. [PMID: 31155144 DOI: 10.1016/j.chroma.2019.05.044] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 05/22/2019] [Accepted: 05/23/2019] [Indexed: 12/24/2022]
Abstract
This article presents fabric phase sorptive extraction (FPSE) as a simple and effective pre-concentration method for the enrichment of acrylate compounds in different food simulants and subsequent analysis of the extracts by ultra-high-performance liquid chromatography with mass spectrometric detection (UPLC-MS). Acrylate compounds come from acrylic adhesives used commonly for sticking the paper labels on polyethylene terephthalate (PET) bottles and therefore, they may exist in recycled polyethylene terephthalate (rPET). Four acrylates were studied: ethylene glycol dimethacrylate (EGDM), pentaerythritol triacrylate (PETA), triethylene glycol diacrylate (TEGDA) and trimethylolpropane triacrylate (TMPTA). Five different types of FPSE media coated with different sol-gel sorbents were studied and finally sol-gel polyethylene glycol- polypropylene glycol-polyethylene glycol triblock copolymer (PEG-PPG-PEG) coated FPSE media was chosen for its satisfactory results. The optimal conditions affecting the extraction efficiency of compounds were determined in three different food simulants. Statistical evaluation of this method reveals good linearity and precision. Under the optimized conditions, the method provided limits of detection of the compounds in the range of (0.1-1.9 ng g-1, 0.1-1.2 ng g-1, 0.2-2.3 ng g-1) in EtOH 10%, HAc 3% and EtOH 20% and the enrichment factor values (EFs) after applying N2 were in the range of 11.1-25.0, 13.8-26.3, 8.3-21.9, in simulants A, B and C respectively. The optimized method was applied successfully to analyze thirteen types of recycled PET samples. Acrylates were found in some of the samples at ng g-1 levels.
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Affiliation(s)
- Mahdiyeh Otoukesh
- Analytical Chemistry Department, GUIA Group, I3A, EINA, University of Zaragoza, Made Luna 3, 50018, Zaragoza, Spain; Department of Chemistry, Faculty of Sciences, Ferdowsi University of Mashhad, Iran
| | - Cristina Nerín
- Analytical Chemistry Department, GUIA Group, I3A, EINA, University of Zaragoza, Made Luna 3, 50018, Zaragoza, Spain.
| | - Margarita Aznar
- Analytical Chemistry Department, GUIA Group, I3A, EINA, University of Zaragoza, Made Luna 3, 50018, Zaragoza, Spain
| | - Abuzar Kabir
- International Forensic Research Institute, Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th Street, Miami, FL, 33199, USA
| | - Kenneth G Furton
- International Forensic Research Institute, Department of Chemistry and Biochemistry, Florida International University, 11200 SW 8th Street, Miami, FL, 33199, USA
| | - Zarrin Es'haghi
- Department of Chemistry, Payame Noor University, 19395-4697 Tehran, Iran
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11
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Ronco LI, Feuser PE, da Cas Viegas A, Minari RJ, Gugliotta LM, Sayer C, Araújo PHH. Incorporation of Magnetic Nanoparticles in Poly(Methyl Methacrylate) Nanocapsules. MACROMOL CHEM PHYS 2018. [DOI: 10.1002/macp.201700424] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Ludmila I. Ronco
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC UNL-CONICET); Güemes 3450 Santa Fe 3000 Argentina
| | - Paulo E. Feuser
- Department of Chemical Engineering and Food Engineering; Federal University of Santa Catarina; Florianopolis SC 88040-900 Brazil
| | - Alexandre da Cas Viegas
- Department of Physic; Federal University of Santa Catarina; Florianopolis SC 88040-900 Brazil
| | - Roque J. Minari
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC UNL-CONICET); Güemes 3450 Santa Fe 3000 Argentina
| | - Luis M. Gugliotta
- Instituto de Desarrollo Tecnológico para la Industria Química (INTEC UNL-CONICET); Güemes 3450 Santa Fe 3000 Argentina
| | - Claudia Sayer
- Department of Chemical Engineering and Food Engineering; Federal University of Santa Catarina; Florianopolis SC 88040-900 Brazil
| | - Pedro H. H. Araújo
- Department of Chemical Engineering and Food Engineering; Federal University of Santa Catarina; Florianopolis SC 88040-900 Brazil
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12
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Spencer A, Gazzani P, Thompson DA. Acrylate and methacrylate contact allergy and allergic contact disease: a 13-year review. Contact Dermatitis 2016; 75:157-64. [PMID: 27402324 DOI: 10.1111/cod.12647] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2016] [Revised: 05/27/2016] [Accepted: 05/30/2016] [Indexed: 11/28/2022]
Affiliation(s)
- Ashley Spencer
- Birmingham Skin Centre; Sandwell and West Birmingham Hospitals NHS Trust; Birmingham B18 7QH UK
| | - Paul Gazzani
- Birmingham Skin Centre; Sandwell and West Birmingham Hospitals NHS Trust; Birmingham B18 7QH UK
| | - Donna A. Thompson
- Birmingham Skin Centre; Sandwell and West Birmingham Hospitals NHS Trust; Birmingham B18 7QH UK
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13
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Quist SR, Papakonstantinou E, Ambach A, Quist J, Göppner D, Reinhold A, Vlanti V, Franke I, Gollnick HP. Verrucous lichen planus following contact sensitivity to implanted gentamicin-polymethylmethacrylate bead chains. J Eur Acad Dermatol Venereol 2016; 31:e35-e36. [PMID: 26927599 DOI: 10.1111/jdv.13623] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2015] [Accepted: 01/06/2016] [Indexed: 11/28/2022]
Affiliation(s)
- S R Quist
- Department of Dermatology and Venereology, Otto-von-Guericke University, Magdeburg, Germany
| | - E Papakonstantinou
- Department of Dermatology and Venereology, Otto-von-Guericke University, Magdeburg, Germany
| | - A Ambach
- Department of Dermatology and Venereology, Otto-von-Guericke University, Magdeburg, Germany
| | - J Quist
- Department of Dermatology and Venereology, Otto-von-Guericke University, Magdeburg, Germany
| | - D Göppner
- Department of Dermatology and Venereology, Otto-von-Guericke University, Magdeburg, Germany
| | - A Reinhold
- Institute of Molecular and Clinical Immunology, Otto-von-Guericke University, Magdeburg, Germany
| | - V Vlanti
- Department of Dermatology and Venereology, Otto-von-Guericke University, Magdeburg, Germany
| | - I Franke
- Department of Dermatology and Venereology, Otto-von-Guericke University, Magdeburg, Germany
| | - H P Gollnick
- Department of Dermatology and Venereology, Otto-von-Guericke University, Magdeburg, Germany
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14
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New Ti-Alloys and Surface Modifications to Improve the Mechanical Properties and the Biological Response to Orthopedic and Dental Implants: A Review. BIOMED RESEARCH INTERNATIONAL 2016; 2016:2908570. [PMID: 26885506 PMCID: PMC4738729 DOI: 10.1155/2016/2908570] [Citation(s) in RCA: 94] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Accepted: 11/30/2015] [Indexed: 12/14/2022]
Abstract
Titanium implants are widely used in the orthopedic and dentistry fields for many decades, for joint arthroplasties, spinal and maxillofacial reconstructions, and dental prostheses. However, despite the quite satisfactory survival rates failures still exist. New Ti-alloys and surface treatments have been developed, in an attempt to overcome those failures. This review provides information about new Ti-alloys that provide better mechanical properties to the implants, such as superelasticity, mechanical strength, and corrosion resistance. Furthermore, in vitro and in vivo studies, which investigate the biocompatibility and cytotoxicity of these new biomaterials, are introduced. In addition, data regarding the bioactivity of new surface treatments and surface topographies on Ti-implants is provided. The aim of this paper is to discuss the current trends, advantages, and disadvantages of new titanium-based biomaterials, fabricated to enhance the quality of life of many patients around the world.
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Kimber I, Pemberton MA. Assessment of the skin sensitising potency of the lower alkyl methacrylate esters. Regul Toxicol Pharmacol 2014; 70:24-36. [PMID: 24956587 DOI: 10.1016/j.yrtph.2014.06.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2014] [Revised: 06/11/2014] [Accepted: 06/15/2014] [Indexed: 01/08/2023]
Abstract
There is continued interest in, and imperatives for, the classification of contact allergens according to their relative skin sensitising potency. However, achieving that end can prove problematic, not least when there is an apparent lack of concordance between experimental assessments of potency and the prevalence allergic contact dermatitis as judged by clinical experience. For the purpose of exploring this issue, and illustrating the important considerations that are required to reach sound judgements about potency categorisation, the lower alkyl methacrylate esters (LAM) have been employed here as a case study. Although the sensitising potential of methyl methacrylate (MMA) has been reviewed previously, there is available new information that is relevant for assessment of skin sensitising potency. Moreover, for the purposes of this article, analyses have been extended to include also other LAM for which relevant data are available: ethyl methacrylate (EMA), n-butyl methacrylate (nBMA), isobutyl methacrylate (iBMA), and 2-ethylhexyl methacrylate (EHMA). In addressing the skin sensitising activity of these chemicals and in drawing conclusions regarding relative potency, a number of sources of information has been considered, including estimates of potency derived from local lymph node assay (LLNA) data, the results of guinea pig assays, and data derived from in silico methods and from recently developed in vitro approaches. Moreover, clinical experience of skin sensitisation of humans by LAM has also been evaluated. The conclusion drawn is that MMA and other LAM are contact allergens, but that none of these chemicals has any more than weak skin sensitising potency. We have also explored here the possible bases for this modest sensitising activity. Finally, the nature of exposure to LAM has been reviewed briefly and on the basis of that information, together with an understanding of skin sensitising potency, a risk assessment has been prepared.
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Affiliation(s)
- Ian Kimber
- Faculty of Life Sciences, University of Manchester, Manchester, UK
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