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Hupatz H, Rahu I, Wang WC, Peets P, Palm EH, Kruve A. Critical review on in silico methods for structural annotation of chemicals detected with LC/HRMS non-targeted screening. Anal Bioanal Chem 2024:10.1007/s00216-024-05471-x. [PMID: 39138659 DOI: 10.1007/s00216-024-05471-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2024] [Revised: 07/22/2024] [Accepted: 07/24/2024] [Indexed: 08/15/2024]
Abstract
Non-targeted screening with liquid chromatography coupled to high-resolution mass spectrometry (LC/HRMS) is increasingly leveraging in silico methods, including machine learning, to obtain candidate structures for structural annotation of LC/HRMS features and their further prioritization. Candidate structures are commonly retrieved based on the tandem mass spectral information either from spectral or structural databases; however, the vast majority of the detected LC/HRMS features remain unannotated, constituting what we refer to as a part of the unknown chemical space. Recently, the exploration of this chemical space has become accessible through generative models. Furthermore, the evaluation of the candidate structures benefits from the complementary empirical analytical information such as retention time, collision cross section values, and ionization type. In this critical review, we provide an overview of the current approaches for retrieving and prioritizing candidate structures. These approaches come with their own set of advantages and limitations, as we showcase in the example of structural annotation of ten known and ten unknown LC/HRMS features. We emphasize that these limitations stem from both experimental and computational considerations. Finally, we highlight three key considerations for the future development of in silico methods.
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Affiliation(s)
- Henrik Hupatz
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius Väg 16, 114 18, Stockholm, Sweden
- Stockholm University Center for Circular and Sustainable Systems (SUCCeSS), Stockholm University, 106 91, Stockholm, Sweden
| | - Ida Rahu
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius Väg 16, 114 18, Stockholm, Sweden.
| | - Wei-Chieh Wang
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius Väg 16, 114 18, Stockholm, Sweden
| | - Pilleriin Peets
- Institute of Biodiversity, Faculty of Biological Science, Cluster of Excellence Balance of the Microverse, Friedrich Schiller University Jena, 07743, Jena, Germany
| | - Emma H Palm
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, 6 Avenue du Swing, 4367, Belvaux, Luxembourg
| | - Anneli Kruve
- Department of Materials and Environmental Chemistry, Stockholm University, Svante Arrhenius Väg 16, 114 18, Stockholm, Sweden.
- Stockholm University Center for Circular and Sustainable Systems (SUCCeSS), Stockholm University, 106 91, Stockholm, Sweden.
- Department of Environmental Science, Stockholm University, Svante Arrhenius Väg 8, 114 18, Stockholm, Sweden.
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Abaie E, Kumar M, Kumar N, Sun Y, Guelfo J, Shen Y, Reible D. Application of β-Cyclodextrin Adsorbents in the Removal of Mixed Per- and Polyfluoroalkyl Substances. TOXICS 2024; 12:264. [PMID: 38668487 PMCID: PMC11054934 DOI: 10.3390/toxics12040264] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 03/28/2024] [Accepted: 03/28/2024] [Indexed: 04/29/2024]
Abstract
The extensive use of per- and polyfluoroalkyl substances (PFASs) in industrial consumer products has led to groundwater contamination, raising concerns for human health and the environment. These persistent chemicals exist in different forms with varying properties, which makes their removal challenging. In this study, we assessed the effectiveness of three different β-cyclodextrin (β-CD) adsorbents at removing a mixture of PFASs, including anionic, neutral, and zwitterionic compounds, at neutral pH. We calculated linear partition coefficient (Kd) values to quantify the adsorption affinity of each PFAS. β-CD polymers crosslinked with hexamethylene diisocyanate (β-CD-HDI) and epichlorohydrin (β-CD-EPI) displayed some adsorption of PFASs. Benzyl chloride β-CD (β-CD-Cl), an adsorbent that had not been previously reported, was also synthesized and tested for PFAS adsorption. β-CD-Cl exhibited higher PFAS adsorption than β-CD-HDI and β-CD-EPI, with log Kd values ranging from 1.9 L·g-1 to 3.3 L·g-1. β-CD-Cl displayed no affinity for zwitterionic compounds, as opposed to β-CD-HDI and β-CD-EPI, which removed N-dimethyl ammonio propyl perfluorohexane sulfonamide (AmPr-FHxSA). A comparison between Kd values and the log Kow of PFAS confirmed the significant role of hydrophobic interactions in thee adsorption mechanism. This effect was stronger in β-CD-Cl, compared to β-CD-HDI and β-CD-EPI. While no effect of PFAS charge was observed in β-CD-Cl, some influence of charge was observed in β-CD-HDI and β-CD-EPI, with less negative compounds being more adsorbed. The adsorption of PFASs by β-CD-Cl was similar in magnitude to that of other adsorbents proposed in literature. However, it offers the advantage of not containing fluorine, unlike many commonly proposed adsorbents.
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Affiliation(s)
- Elham Abaie
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
| | - Manish Kumar
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
| | - Naveen Kumar
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
| | - Yilang Sun
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
| | - Jennifer Guelfo
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
| | - Yuexiao Shen
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
| | - Danny Reible
- Civil, Environmental, and Construction Engineering Department, Texas Tech University, Lubbock, TX 79409, USA; (E.A.); (M.K.); (N.K.); (Y.S.); (J.G.)
- Chemical Engineering Department, Texas Tech University, Lubbock, TX 79409, USA
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Antle JP, LaRock MA, Falls Z, Ng C, Atilla-Gokcumen GE, Aga DS, Simpson SM. Building Chemical Intuition about Physicochemical Properties of C8-Per-/Polyfluoroalkyl Carboxylic Acids through Computational Means. ACS ES&T ENGINEERING 2023; 4:196-208. [PMID: 38860110 PMCID: PMC11164130 DOI: 10.1021/acsestengg.3c00267] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2024]
Abstract
We have predicted acid dissociation constants (pK a), octanol-water partition coefficients (K OW), and DMPC lipid membrane-water partition coefficients (K lipid-w) of 150 different eight-carbon-containing poly-/perfluoroalkyl carboxylic acids (C8-PFCAs) utilizing the COnductor-like Screening MOdel for Realistic Solvents (COSMO-RS) theory. Different trends associated with functionalization, degree of fluorination, degree of saturation, degree of chlorination, and branching are discussed on the basis of the predicted values for the partition coefficients. In general, functionalization closest to the carboxylic headgroup had the greatest impact on the value of the predicted physicochemical properties.
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Affiliation(s)
- Jonathan P Antle
- Department of Chemistry, University at Buffalo, the State University of New York (SUNY), Buffalo, New York 14260, United States
| | - Michael A LaRock
- Department of Chemistry, St. Bonaventure University, St. Bonaventure, New York 14778, United States
| | - Zackary Falls
- Department of Biomedical Informatics, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, New York 14203, United States
| | - Carla Ng
- Department of Civil & Environmental Engineering, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - G Ekin Atilla-Gokcumen
- Department of Chemistry, University at Buffalo, the State University of New York (SUNY), Buffalo, New York 14260, United States
| | - Diana S Aga
- Department of Chemistry, University at Buffalo, the State University of New York (SUNY), Buffalo, New York 14260, United States
| | - Scott M Simpson
- Department of Chemistry, St. Bonaventure University, St. Bonaventure, New York 14778, United States
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Sosnowska A, Mudlaff M, Gorb L, Bulawska N, Zdybel S, Bakker M, Peijnenburg W, Puzyn T. Expanding the applicability domain of QSPRs for predicting water solubility and vapor pressure of PFAS. CHEMOSPHERE 2023; 340:139965. [PMID: 37633602 DOI: 10.1016/j.chemosphere.2023.139965] [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: 05/10/2023] [Revised: 08/22/2023] [Accepted: 08/23/2023] [Indexed: 08/28/2023]
Abstract
This work aimed to verify whether it is possible to extend the applicability domain (AD) of existing QSPR (Quantitative Structure-Property Relationship) models by employing a strategy involving additional quantum-chemical calculations. We selected two published QSPR models: for water solubility, logSW, and vapor pressure, logVP of PFAS as case studies. We aimed to enlarge set of compounds used to build the model by applying factorial planning to plan the augmentation of the set of these compounds based on their structural features (descriptors). Next, we used the COSMO-RS model to calculate the logSW and logVP for selected chemicals. This allowed filling gaps in the experimental data for further training QSPR models. We improved the published models by significantly extending number of compounds for which theoretical predictions are reliable (i.e., extending the AD). Additionally, we performed external validation that had not been carried out in original models. To test effectiveness of the AD extension, we screened 4519 PFAS from NORMAN Database. The number of compounds outside the domain was reduced comparing the original model for both properties. Our work shows that combining physics-based methods with data-driven models can significantly improve the performance of predictions of phys-chem properties relevant for the chemical risk assessment.
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Affiliation(s)
| | | | - Leonid Gorb
- QSAR Lab, Trzy Lipy 3, 80-172, Gdańsk, Poland; Institute of Molecular Biology and Genetics, National Academy of Sciences of Ukraine, 150 Zabolotnogo Str., 03680, Kyiv, Ukraine
| | | | | | - Martine Bakker
- National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands
| | - Willie Peijnenburg
- National Institute for Public Health and the Environment (RIVM), Bilthoven, the Netherlands; Institute of Environmental Sciences (CML), Leiden University, RA Leiden, 2300, the Netherlands
| | - Tomasz Puzyn
- QSAR Lab, Trzy Lipy 3, 80-172, Gdańsk, Poland; University of Gdansk, Faculty of Chemistry, Wita Stwosza 63, 80-308, Gdansk, Poland.
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Cheng H, Jin H, Lu B, Lv C, Ji Y, Zhang H, Fan R, Zhao N. Emerging poly- and perfluoroalkyl substances in water and sediment from Qiantang River-Hangzhou Bay. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 875:162687. [PMID: 36906013 DOI: 10.1016/j.scitotenv.2023.162687] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 03/01/2023] [Accepted: 03/03/2023] [Indexed: 06/18/2023]
Abstract
Many emerging poly- and perfluoroalkyl substances (PFASs) are being used in China, due to the gradual phase out of legacy PFASs. Occurrence and environmental behaviors of emerging PFASs in Chinese fresh water environment are still not well known. In this study, 31 PFASs, including 14 emerging PFASs, were measured in 29 pairs of water and sediment samples from Qiantang River-Hangzhou Bay, an important drinking water resource for cities in Yangtze River basin. Perfluorooctanoate was consistently the predominant legacy PFAS in water (8.8-130 ng/L) and sediment (3.7-49 ng/g dw). Twelve emerging PFASs were detected in water, with the dominance of 6:2 chlorinated polyfluoroalkyl ether sulfonates (6:2 Cl-PFAES; mean 11 ng/L, 0.79-57 ng/L) and 6:2 fluorotelomer sulfonate (6:2 FTS; 5.6 ng/L, < LOD-29 ng/L). Eleven emerging PFASs were found in sediment, and were also dominated by 6:2 Cl-PFAES (mean 4.3 ng/g dw, 0.19-16 ng/g dw) and 6:2 FTS (2.6 ng/g dw, < LOD-9.4 ng/g dw). Spatially, sampling sites closed to the surrounding cities had comparatively higher water concentrations of PFASs. Among emerging PFASs, 8:2 Cl-PFAES (3.0 ± 0.34) had the highest mean field-based log-transformed organic‑carbon normalized sediment-water partition coefficient (log Koc), followed by 6:2 Cl-PFAES (2.9 ± 0.35) and hexafluoropropylene oxide trimer acid (2.8 ± 0.32). p-perfluorous nonenoxybenzene sulfonate (2.3 ± 0.60) and 6:2 FTS (1.9 ± 0.54) had relatively lower mean log Koc values. To our knowledge, this is the most comprehensive study investigating the occurrence and partitioning behaviors of emerging PFASs in Qiantang River.
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Affiliation(s)
- Haixiang Cheng
- College of Chemical and Material Engineering, Quzhou University, Quzhou, Zhejiang 324000, PR China.
| | - Hangbiao Jin
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, PR China
| | - Bin Lu
- Zhejiang Yilong Environmental Protection Technology Co., Taiyue Digital Port, Xiaoshan District, Hangzhou 311202, PR China
| | - Chenhan Lv
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, PR China
| | - Yinghui Ji
- College of Chemical Engineering, Zhejiang University of Technology, Hangzhou, Zhejiang 310014, PR China
| | - Hui Zhang
- Zhongyuan Energy Company Limited, Beijing 100084, PR China
| | - Rui Fan
- College of Chemical and Material Engineering, Quzhou University, Quzhou, Zhejiang 324000, PR China
| | - Nan Zhao
- Key Laboratory of Microbial Technology for Industrial Pollution Control of Zhejiang Province, College of Environment, Zhejiang University of Technology, Hangzhou, Zhejiang 310032, PR China
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Zhang M, Suuberg EM. Estimation of vapor pressures of perfluoroalkyl substances (PFAS) using COSMOtherm. JOURNAL OF HAZARDOUS MATERIALS 2023; 443:130185. [PMID: 36274547 DOI: 10.1016/j.jhazmat.2022.130185] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 09/17/2022] [Accepted: 10/11/2022] [Indexed: 06/16/2023]
Abstract
The widespread presence of per- and polyfluoroalkyl substances (PFAS) in the environment and a recognition of their possible health effects has, over the past decade, raised public concerns and led to much new research on these materials. In this field, with so many compounds of potential interest or concern, measuring the physical properties of even a small fraction of these compounds is a formidable task. The research community has turned to use of computational methods to begin to predict many useful properties, based just upon the structure of the compound. In this work, a quantum chemistry computational method (COSMO-RS) has been applied for exploring the possibility and accuracy of PFAS compound property estimation. The vapor pressures and boiling points of eleven PFAS are calculated with COSMOtherm and compared with available experimental data and literature calculation data using other packages. In the meantime, these measured results have permitted evaluation of this popular property estimation technique, which has not yet been fully validated for this class of compounds.
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Affiliation(s)
- Mengke Zhang
- School of Engineering, Brown University, Providence, RI 02912, United States.
| | - Eric M Suuberg
- School of Engineering, Brown University, Providence, RI 02912, United States.
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Dickman RA, Aga DS. A review of recent studies on toxicity, sequestration, and degradation of per- and polyfluoroalkyl substances (PFAS). JOURNAL OF HAZARDOUS MATERIALS 2022; 436:129120. [PMID: 35643010 DOI: 10.1016/j.jhazmat.2022.129120] [Citation(s) in RCA: 61] [Impact Index Per Article: 30.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 05/04/2022] [Accepted: 05/07/2022] [Indexed: 05/27/2023]
Abstract
The fate, effects, and treatment of per- and polyfluoroalkyl substances (PFAS), an anthropogenic class of chemicals used in industrial and commercial production, are topics of great interest in recent research and news cycles. This interest stems from the ubiquity of PFAS in the global environment as well as their significant toxicological effects in humans and wildlife. Research on toxicity, sequestration, removal, and degradation of PFAS has grown rapidly, leading to a flood of valuable knowledge that can get swamped out in the perpetual rise in the number of publications. Selected papers from the Journal of Hazardous Materials between January 2018 and May 2022 on the toxicity, sequestration, and degradation of PFAS are reviewed in this article and made available as open-access publications for one year, in order to facilitate the distribution of critical knowledge surrounding PFAS. This review discusses routes of toxicity as observed in mammalian and cellular models, and the observed human health effects in exposed communities. Studies that evaluate of toxicity through in-silico approaches are highlighted in this paper. Removal of PFAS through modified carbon sorbents, nanoparticles, and anion exchange materials are discussed while comparing treatment efficiencies for different classes of PFAS. Finally, various biotic and abiotic degradation techniques, and the pathways and mechanisms involved are reviewed to provide a better understanding on the removal efficiencies and cost effectiveness of existing treatment strategies.
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Affiliation(s)
- Rebecca A Dickman
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, NY 14260, United States
| | - Diana S Aga
- Department of Chemistry, The State University of New York at Buffalo, Buffalo, NY 14260, United States.
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Fabregat-Safont D, Ibáñez M, Bijlsma L, Hernández F, Waichman AV, de Oliveira R, Rico A. Wide-scope screening of pharmaceuticals, illicit drugs and their metabolites in the Amazon River. WATER RESEARCH 2021; 200:117251. [PMID: 34087513 DOI: 10.1016/j.watres.2021.117251] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 04/29/2021] [Accepted: 05/11/2021] [Indexed: 05/24/2023]
Abstract
Only a limited number of households in the Amazon are served by sewage collection or treatment facilities, suggesting that there might be a significant emission of pharmaceuticals and other wastewater contaminants into freshwater ecosystems. In this work, we performed a wide-scope screening to assess the occurrence of pharmaceuticals, illicit drugs and their metabolites in freshwater ecosystems of the Brazilian Amazon. Our study included 40 samples taken along the Amazon River, in three of its major tributaries, and in small tributaries crossing four important urban areas (Manaus, Santarém, Macapá, Belém). More than 900 compounds were investigated making use of target and suspect screening approaches, based on liquid chromatography coupled to high-resolution mass spectrometry with ion mobility separation. Empirical collision-cross section (CCS) values were used to help and confirm identifications in target screening, while in the suspect screening approach CCS values were predicted using Artificial Neural Networks to increase the confidence of the tentative identification. In this way, 51 compounds and metabolites were identified. The highest prevalence was found in streams crossing the urban areas of Manaus, Macapá and Belém, with some samples containing up to 30 - 40 compounds, while samples taken in Santarém showed a lower number (8 - 11), and the samples taken in the main course of the Amazon River and its tributaries contained between 1 and 7 compounds. Most compounds identified in areas with significant urban impact belonged to the analgesics and antihypertensive categories, followed by stimulants and antibiotics. Compounds such as caffeine, cocaine and its metabolite benzoylecgonine, and cotinine (the metabolite of nicotine), were also detected in areas with relatively low anthropogenic impact and showed the highest total prevalence. This study supports the need to improve the sanitation system of urban areas in the Brazilian Amazon and the development of follow-up studies aimed at quantifying exposure levels and risks for Amazonian freshwater biodiversity.
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Affiliation(s)
- David Fabregat-Safont
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water (IUPA), University Jaume I, Avda. Sos Baynat s/n, 12071, Castellón, Spain
| | - María Ibáñez
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water (IUPA), University Jaume I, Avda. Sos Baynat s/n, 12071, Castellón, Spain
| | - Lubertus Bijlsma
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water (IUPA), University Jaume I, Avda. Sos Baynat s/n, 12071, Castellón, Spain
| | - Félix Hernández
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water (IUPA), University Jaume I, Avda. Sos Baynat s/n, 12071, Castellón, Spain
| | - Andrea V Waichman
- Federal University of the Amazon, Institute of Biological Sciences, Av. Rodrigo Otávio Jordão Ramos 3000, Manaus 69077-000, Brazil
| | - Rhaul de Oliveira
- University of Campinas, School of Technology, Rua Paschoal Marmo 1888 - Jd. Nova Itália, Limeira 13484-332, Brazil
| | - Andreu Rico
- IMDEA Water Institute, Science and Technology Campus of the University of Alcalá, Av. Punto Com 2, Alcalá de Henares 28805, Madrid, Spain; Cavanilles Institute of Biodiversity and Evolutionary Biology, University of Valencia, c/ Catedrático José Beltrán 2, 46980, Paterna, Valencia, Spain.
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