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Tanzin T, Arabi II, Mohinuddin M, Hossain MI. Ammonium-based ionic liquids: synthesis, characterization, computational approach, molecular docking study and phytotoxicity assessment. J Mol Struct 2023. [DOI: 10.1016/j.molstruc.2022.134337] [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]
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2
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Liu XL, Chen MQ, Jiang YL, Gao RY, Wang ZJ, Wang P. Rhodobacter sphaeroides as a model to study the ecotoxicity of 1-alkyl-3-methylimidazolium bromide. Front Mol Biosci 2023; 10:1106832. [PMID: 36793784 PMCID: PMC9923006 DOI: 10.3389/fmolb.2023.1106832] [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: 11/24/2022] [Accepted: 01/19/2023] [Indexed: 01/31/2023] Open
Abstract
The purple non-sulfur bacterium Rhodobacter sphaeroides was selected as a biological model to investigate its response to the toxicity of 1-alkyl-3-methylimidazolium bromide ([Cnmim]Br), a type of ionic liquid (IL), with different alkyl chain lengths (n describes the number of carbon atoms in the alkyl chain). The inhibition of bacterial growth by [Cnmim]Br was positively correlated with n. Morphological characterization revealed that [Cnmim]Br caused cell membrane perforation. The signal amplitude of the electrochromic absorption band shift of endogenous carotenoids showed a negatively linear correlation with n, and the amplitude of the blue-shift of the B850 band in light-harvesting complex 2 showed a positively linear correlation with n. Furthermore, an increase in blocked ATP synthesis and increase in antioxidant enzyme activity were observed in chromatophores treated with ILs containing longer alkyl chains. In summary, the purple bacterium can be developed as a model to monitor ecotoxicity and examine the mechanism of IL toxicity.
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Nashed O, Talib NK, Lal B, Ghanem OB, Mohshim DF, Sabil KM, Shariff AM. Measurement of physicochemical properties of green aqueous amino acid‐based ionic liquids and their correlation with temperature and concentration. ASIA-PAC J CHEM ENG 2022. [DOI: 10.1002/apj.2860] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
- Omar Nashed
- Department of Chemical Engineering, Faculty of Technical Engineering Bright Star University El‐Brega Libya
| | - Nur Khairunnisa Talib
- Chemical Engineering Department Universiti Teknologi PETRONAS Bandar Seri Iskandar Perak 32610 Malaysia
| | - Bhajan Lal
- Chemical Engineering Department Universiti Teknologi PETRONAS Bandar Seri Iskandar Perak 32610 Malaysia
- CO2 Research Centre (CO2RES) Universiti Teknologi PETRONAS Bandar Seri Iskandar Perak 32610 Malaysia
| | | | - Dzeti Farhah Mohshim
- Petroleum Engineering Department Universiti Teknologi PETRONAS Seri Iskandar Perak 32610 Malaysia
| | - Khalik M. Sabil
- PETRONAS Research Sdn Bhd Kawasan Institusi Bangi Lot 3288 3289 Off Jalan Ayer Itam Kajang Selangor 43000 Malaysia
| | - Azmi Mohd Shariff
- Chemical Engineering Department Universiti Teknologi PETRONAS Bandar Seri Iskandar Perak 32610 Malaysia
- CO2 Research Centre (CO2RES) Universiti Teknologi PETRONAS Bandar Seri Iskandar Perak 32610 Malaysia
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4
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Makarov D, Fadeeva Y, Safonova E, Shmukler L. Predictive modeling of antibacterial activity of ionic liquids by machine learning methods. Comput Biol Chem 2022; 101:107775. [DOI: 10.1016/j.compbiolchem.2022.107775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Revised: 09/24/2022] [Accepted: 10/03/2022] [Indexed: 11/03/2022]
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5
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Veríssismo NV, Nakamura CN, Oliveira FD, Kuhn BL, Frizzo CP, Pereira JF, Santos-Ebinuma VC. Effect of amphiphilic ionic liquids on the colorimetric properties of polyketides colorants. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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6
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An YM, Zhuang J, Li Y, Dai JY, Xiu ZL. Pretreatment of Jerusalem artichoke stalk using hydroxylammonium ionic liquids and their influences on 2,3-butanediol fermentation by Bacillus subtilis. BIORESOURCE TECHNOLOGY 2022; 354:127219. [PMID: 35470003 DOI: 10.1016/j.biortech.2022.127219] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/15/2022] [Revised: 04/19/2022] [Accepted: 04/20/2022] [Indexed: 06/14/2023]
Abstract
Pretreatment of lignocellulose is a vital step for biological production of bio-chemicals and bio-fuels. In this work, the pretreatment of Jerusalem artichoke stalk (JAS) by hydroxylammonium ionic liquids was evaluated based on pretreatment efficiency including polysaccharide recovery and enzymatic digestibility, and influence of ionic liquids on 2,3-butanediol fermentation using Bacillus subtilis. The results showed ethanolammonium acetate (EOAA) was efficient in JAS pretreatment, and maximum cell density was increased 25% when EOAA concentration was not greater than 0.3 mol/L in medium, while the total concentration of acetoin and 2,3-butanediol was 15% greater than the control at 0.1 mol/L EOAA. After the pretreatment under optimized conditions of 170 °C for 5-h and liquid-solid ratio of 18, about 87% cellulose and 75% hemicellulose were recovered, and glucose yield of 64% and xylose of 66% were obtained after 24-h hydrolysis of JAS residue by cellulase (15 FPU/g) with solid loading of 10 wt%.
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Affiliation(s)
- Yu-Meng An
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China
| | - Jing Zhuang
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China
| | - Yan Li
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China
| | - Jian-Ying Dai
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China.
| | - Zhi-Long Xiu
- School of Bioengineering, Dalian University of Technology, Dalian 116024, PR China
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7
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Chen X, Sun H, Zhang T, Shang H, Han Z, Li Y. Effects of pyridinium-based ionic liquids with different alkyl chain lengths on the growth of maize seedlings. JOURNAL OF HAZARDOUS MATERIALS 2022; 427:127868. [PMID: 34865901 DOI: 10.1016/j.jhazmat.2021.127868] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 11/05/2021] [Accepted: 11/18/2021] [Indexed: 06/13/2023]
Abstract
The effects of four water-soluble pyridinium-based ionic liquids (ILs) differing in alkyl side chain length, namely, N-ethyl pyridinium bromide ([EPy]Br), N-butyl pyridinium bromide ([BPy]Br), N-hexyl pyridinium bromide ([HPy]Br), and N-octyl pyridinium bromide ([OPy]Br), on the growth of maize seedlings were investigated for the first time. The results revealed that the phytotoxicity of these ILs was significantly correlated with their concentration and alkyl side chain length. The 8-day 50% inhibition values indicated that the toxicity increased as the length of the alkyl chain increased: [EPy]Br < [BPy]Br < [HPy]Br < [OPy]Br. In addition, root growth was found to be more sensitive to ILs than stem growth. In response to exposure to ILs of increasing concentration, we observed different trends in the pigment contents and specific antioxidant enzyme activities in maize seedlings, whereas the contents of malondialdehyde were significantly increased. In addition, RNA sequencing analysis, performed to examine the gene expression profiles of maize leaves under [HPy]Br and [OPy]Br treatments, revealed that a larger number of genes were differentially expressed in response to [OPy]Br treatment. Furthermore, pathway enrichment analysis revealed that both [HPy]Br and [OPy]Br treatments, and particularly the latter, caused a down-regulation of genes involved in photosynthesis and carbohydrate and nitrogen metabolism. Our findings thus indicate that pyridinium-based IL toxicity might be associated with oxidative stress and changes in gene expression profiles.
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Affiliation(s)
- Xiaohong Chen
- College of Life Science, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Huanxuan Sun
- College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Tianyue Zhang
- College of Life Science, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Hongyue Shang
- College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Zhaoxue Han
- College of Life Science, Northwest A&F University, Yangling, Shaanxi 712100, China
| | - Yajun Li
- College of Agronomy, Northwest A&F University, Yangling, Shaanxi 712100, China.
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8
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Beil S, Markiewicz M, Pereira CS, Stepnowski P, Thöming J, Stolte S. Toward the Proactive Design of Sustainable Chemicals: Ionic Liquids as a Prime Example. Chem Rev 2021; 121:13132-13173. [PMID: 34523909 DOI: 10.1021/acs.chemrev.0c01265] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
The tailorable and often unique properties of ionic liquids (ILs) drive their implementation into a broad variety of seminal technologies. The modular design of ILs allows in this context a proactive selection of structures that favor environmental sustainability─ideally without compromising their technological performance. To achieve this objective, the whole life cycle must be taken into account and various aspects considered simultaneously. In this review, we discuss how the structural design of ILs affects their environmental impacts throughout all stages of their life cycles and scrutinize the available data in order to point out knowledge gaps that need further research activities. The design of more sustainable ILs starts with the selection of the most beneficial precursors and synthesis routes, takes their technical properties and application specific performance into due account, and considers its environmental fate particularly in terms of their (eco)toxicity, biotic and abiotic degradability, mobility, and bioaccumulation potential. Special emphasis is placed on reported structure-activity relationships and suggested mechanisms on a molecular level that might rationalize the empirically found design criteria.
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Affiliation(s)
- Stephan Beil
- Institute of Water Chemistry, TU Dresden, 01062 Dresden, Germany
| | - Marta Markiewicz
- Institute of Water Chemistry, TU Dresden, 01062 Dresden, Germany
| | - Cristina Silva Pereira
- Instituto de Tecnologia Química e Biológica António Xavier, Universidade Nova de Lisboa (ITQB NOVA), Av. da República, 2780-157 Oeiras, Portugal
| | - Piotr Stepnowski
- Department of Environmental Analysis, Faculty of Chemistry, University of Gdańsk, ul. Wita Stwosza 63, 80-308 Gdańsk, Poland
| | - Jorg Thöming
- Chemical Process Engineering, University of Bremen, Leobener Straße 6, 28359 Bremen, Germany
| | - Stefan Stolte
- Institute of Water Chemistry, TU Dresden, 01062 Dresden, Germany
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9
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Yan J, Yan X, Hu S, Zhu H, Yan B. Comprehensive Interrogation on Acetylcholinesterase Inhibition by Ionic Liquids Using Machine Learning and Molecular Modeling. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2021; 55:14720-14731. [PMID: 34636548 DOI: 10.1021/acs.est.1c02960] [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] [Indexed: 06/13/2023]
Abstract
Quantitative structure-activity relationship (QSAR) modeling can be used to predict the toxicity of ionic liquids (ILs), but most QSAR models have been constructed by arbitrarily selecting one machine learning method and ignored the overall interactions between ILs and biological systems, such as proteins. In order to obtain more reliable and interpretable QSAR models and reveal the related molecular mechanism, we performed a systematic analysis of acetylcholinesterase (AChE) inhibition by 153 ILs using machine learning and molecular modeling. Our results showed that more reliable and stable QSAR models (R2 > 0.85 for both cross-validation and external validation) were obtained by combining the results from multiple machine learning approaches. In addition, molecular docking results revealed that the cations and organic anions of ILs bound to specific amino acid residues of AChE through noncovalent interactions such as π interactions and hydrogen bonds. The calculation results of binding free energy showed that an electrostatic interaction (ΔEele < -285 kJ/mol) was the main driving force for the binding of ILs to AChE. The overall findings from this investigation demonstrate that a systematic approach is much more convincing. Future research in this direction will help design the next generation of biosafe ILs.
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Affiliation(s)
- Jiachen Yan
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, People's Republic of China
| | - Xiliang Yan
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, People's Republic of China
| | - Song Hu
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, People's Republic of China
| | - Hao Zhu
- The Rutgers Center for Computational and Integrative Biology, Camden, New Jersey 08102, United States
| | - Bing Yan
- Institute of Environmental Research at Greater Bay Area, Key Laboratory for Water Quality and Conservation of the Pearl River Delta, Ministry of Education, Guangzhou University, Guangzhou 510006, People's Republic of China
- School of Environmental Science and Engineering, Shandong University, Qingdao 266237, People's Republic of China
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10
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Shi S, Wu Y, Zhang M, Zhang Z, Oderinde O, Gao L, Xiao G. Direct conversion of cellulose to levulinic acid using SO3H-functionalized ionic liquids containing halogen-anions. J Mol Liq 2021. [DOI: 10.1016/j.molliq.2021.117278] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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11
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Cho CW, Pham TPT, Zhao Y, Stolte S, Yun YS. Review of the toxic effects of ionic liquids. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 786:147309. [PMID: 33975102 DOI: 10.1016/j.scitotenv.2021.147309] [Citation(s) in RCA: 84] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/15/2021] [Accepted: 04/18/2021] [Indexed: 05/11/2023]
Abstract
Interest in ionic liquids (ILs), called green or designer solvents, has been increasing because of their excellent properties such as thermal stability and low vapor pressure; thus, they can replace harmful organic chemicals and help several industrial fields e.g., energy-storage materials production and biomaterial pretreatment. However, the claim that ILs are green solvents should be carefully considered from an environmental perspective. ILs, given their minimal vapor pressure, may not directly cause atmospheric pollution. However, they have the potential to cause adverse effects if leaked into the environment, for instance if they are spilled due to human mistakes or technical errors. To estimate the risks of ILs, numerous ILs have had their toxicity assessed toward several micro- and macro-organisms over the past few decades. Since the toxic effects of ILs depend on the method of estimating toxicity, it is necessary to briefly summarize and comprehensively discuss the biological effects of ILs according to their structure and toxicity testing levels. This can help simplify our understanding of the toxicity of ILs. Therefore, in this review, we discuss the key findings of toxicological information of ILs, collect some toxicity data of ILs to different species, and explain the influence of IL structure on their toxic properties. In the discussion, we estimated two different sensitivity values of toxicity testing levels depending on the experiment condition, which are theoretical magnitudes of the inherent sensitivity of toxicity testing levels in various conditions and their changes in biological response according to the change in IL structure. Finally, some perspectives, future research directions, and limitations to toxicological research of ILs, presented so far, are discussed.
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Affiliation(s)
- Chul-Woong Cho
- Department of Bioenergy Science and Technology, Chonnam National University, Gwangju, South Korea.
| | - Thi Phuong Thuy Pham
- Faculty of Biotechnology, HoChiMihn University of Food Industry, Ho Chi Minh City, Viet Nam
| | - Yufeng Zhao
- College of Resource and Environmental Science, South-Central University for Nationalities, Wuhan 430074, Hubei Province, China
| | - Stefan Stolte
- Technische Universität Dresden, Faculty of Environmental Sciences, Department of Hydrosciences, Institute of Water Chemistry, Bergstraße 66, 01062 Dresden, Germany
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea.
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12
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Mur R, Pardo JI, Pino-Otín MR, Urieta JS, Mainar AM. Supercritical Antisolvent Fractionation of Antioxidant Compounds from Salvia officinalis. Int J Mol Sci 2021; 22:9351. [PMID: 34502255 PMCID: PMC8431610 DOI: 10.3390/ijms22179351] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 08/25/2021] [Indexed: 11/29/2022] Open
Abstract
The increasing interest towards greener antioxidants obtained via natural sources and more sustainable processes encourages the development of new theoretical and experimental methods in the field of those compounds. Two advanced separation methods using supercritical CO2 are applied to obtain valuable antioxidants from Salvia officinalis, and a first approximation to a QSAR model relating molecular structure with antioxidant activity is explored in order to be used, in the future, as a guide for the preselection of compounds of interest in these processes. Separation experiments through antisolvent fractionation with supercritical CO2 were designed using a Response Surface Methodology to study the effect of pressure and CO2 flow rate on both mass yields and capability to obtain fractions enriched in three antioxidant compounds: chlorogenic acid, caffeic acid and rosmarinic acid which were tracked using HPLC PDA. Rosmarinic acid was completely retained in the precipitation vessel while chlorogenic and caffeic acids, though distributed between the two separated fractions, had a major presence in the precipitation vessel too. The conditions predicted for an optimal overall yield and enrichment were 148 bar and 10 g/min. Although a training dataset including much more compounds than those now considered can be recommended, descriptors calculated from the σ-profiles provided by COSMO-RS model seem to be adequate for estimating the antioxidant activity of pure compounds through QSAR.
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Affiliation(s)
- Raquel Mur
- GATHERS Group, Aragón Institute of Engineering Research (I3A), Universidad de Zaragoza, C/Mariano Esquillor s/n, 50018 Zaragoza, Spain; (R.M.); (J.I.P.); (J.S.U.)
| | - Juan I. Pardo
- GATHERS Group, Aragón Institute of Engineering Research (I3A), Universidad de Zaragoza, C/Mariano Esquillor s/n, 50018 Zaragoza, Spain; (R.M.); (J.I.P.); (J.S.U.)
| | - M. Rosa Pino-Otín
- Campus Universitario Villanueva de Gállego, Universidad San Jorge, Autovía A-23 Zaragoza-Huesca Km. 299, 50830 Villanueva de Gállego, Spain;
| | - José S. Urieta
- GATHERS Group, Aragón Institute of Engineering Research (I3A), Universidad de Zaragoza, C/Mariano Esquillor s/n, 50018 Zaragoza, Spain; (R.M.); (J.I.P.); (J.S.U.)
| | - Ana M. Mainar
- GATHERS Group, Aragón Institute of Engineering Research (I3A), Universidad de Zaragoza, C/Mariano Esquillor s/n, 50018 Zaragoza, Spain; (R.M.); (J.I.P.); (J.S.U.)
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Khan MI, Mubashir M, Zaini D, Mahnashi MH, Alyami BA, Alqarni AO, Show PL. Cumulative impact assessment of hazardous ionic liquids towards aquatic species using risk assessment methods. JOURNAL OF HAZARDOUS MATERIALS 2021; 415:125364. [PMID: 33740721 DOI: 10.1016/j.jhazmat.2021.125364] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 01/18/2021] [Accepted: 02/05/2021] [Indexed: 06/12/2023]
Abstract
In the present research work, a comprehensive tool for cumulative ecotoxicological impact assessment of ionic liquids (ILs) to aquatic life has been constructed. Using the probabilistic tool, impact of individual ILs to a group of aquatic species is assessed by chemical toxicity distributions (CTDs). The impact of group of ILs to individual aquatic species is assessed by species sensitivity distributions (SSDs). Acute toxicity data of imidazolium ILs with chloride (Cl-), bromide (Br-), tetrafluoroborate (BF4-), and hexafluorophosphate (PF6-) anions are used in CTD and SSD. Allowable concentrations for a group of Imidazolium ILs with the same mode of action (SMOA) to five aquatic species; Daphnia magna, Vibrio fischeri, Algae, Zebrafish, and Escherichia coli are estimated by CTDs. It has been concluded that 1-Butyl-3-methylimidazolium chloride (BMIMCl) possess the lowest risk at an acceptable risk value of 750 × 10-5 mmol/L which is 12% less than that of OMIMCl. Furthermore, the sensitivities towards the aquatic species reveal that from the studied ILs, BMIMBF4 with an acceptable risk value of 3200 × 10-5 mmol/L is the most suitable IL towards the selected aquatic species. Hence, current work provides cumulative allowable concentrations and acceptable risk values for ILs which release to aquatic compartment of ecosystem.
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Affiliation(s)
- Muhammad Ishaq Khan
- Centre of Advanced Process Safety (CAPS), Department of Chemical Engineering, Universiti Teknologi PETRONAS (UTP), 32610 Seri Iskandar, Perak, Malaysia
| | - Muhammad Mubashir
- Department of Petroleum Engineering, School of Engineering, Asia Pacific University of Technology and Innovation, 57000 Kuala Lumpur, Malaysia
| | - Dzulkarnain Zaini
- Centre of Advanced Process Safety (CAPS), Department of Chemical Engineering, Universiti Teknologi PETRONAS (UTP), 32610 Seri Iskandar, Perak, Malaysia
| | - Mater H Mahnashi
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Bandar A Alyami
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Ali O Alqarni
- Department of Pharmaceutical Chemistry, College of Pharmacy, Najran University, Najran, Saudi Arabia
| | - Pau Loke Show
- Department of Chemical and Environmental Engineering, University of Nottingham, Malaysia, 43500 Semenyih, Selangor Darul Ehsan, Malaysia.
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Gonçalves AR, Paredes X, Cristino AF, Santos FJ, Queirós CS. Ionic Liquids-A Review of Their Toxicity to Living Organisms. Int J Mol Sci 2021; 22:5612. [PMID: 34070636 PMCID: PMC8198260 DOI: 10.3390/ijms22115612] [Citation(s) in RCA: 63] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2021] [Revised: 05/21/2021] [Accepted: 05/21/2021] [Indexed: 12/19/2022] Open
Abstract
Ionic liquids (ILs) were initially hailed as a green alternative to traditional solvents because of their almost non-existent vapor pressure as ecological replacement of most common volatile solvents in industrial processes for their damaging effects on the environment. It is common knowledge that they are not as green as desired, and more thought must be put into the biological consequences of their industrial use. Still, compared to the amount of research studying their physicochemical properties and potential applications in different areas, there is a scarcity of scientific papers regarding how these substances interact with different organisms. The intent of this review was to compile the information published in this area since 2015 to allow the reader to better understand how, for example, bacteria, plants, fish, etc., react to the presence of this family of liquids. In general, lipophilicity is one of the main drivers of toxicity and thus the type of cation. The anion tends to play a minor (but not negligible) role, but more research is needed since, owing to the very nature of ILs, except for the most common ones (imidazolium and ammonium-based), many of them are subject to only one or two articles.
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Affiliation(s)
| | | | | | | | - Carla S.G.P. Queirós
- Centro de Química Estrutural, Faculdade de Ciências, Universidade de Lisboa, 1749-016 Lisbon, Portugal; (A.R.P.G.); (X.P.); (A.F.C.); (F.J.V.S.)
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15
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Kaur N, Kumar S, Shiksha, Gahlay GK, Mithu VS. Cytotoxicity and Membrane Permeability of Double-Chained 1,3-Dialkylimidazolium Cations in Ionic Liquids. J Phys Chem B 2021; 125:3613-3621. [PMID: 33818103 DOI: 10.1021/acs.jpcb.1c00592] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have evaluated ionic liquids based on double-chained 1-alkyl-3-octylimidazolium cations ([CnC8IM]+, n = 2, 4, 6, 8, 10, 12) for their cytotoxicity toward various cell lines. The toxicity of ionic liquids was correlated to their ability to partition into and permeabilize phosphocholine (POPC)- or phosphoglycerol (POPG)-based large unilamellar vesicles. Membrane partitioning of ionic liquids was assessed using the ζ-potential measurements, and membrane permeability was determined using fluorescence-based dye leakage assays. Both cytotoxicity and membrane permeability of these ILs were found to increase in a sigmoidal fashion with increasing chain length on the N1 atom (n in [CnC8IM]+) cations. These results were compared with those for ionic liquids based on single-chained 1-alkyl-3-methylimidazolium cations ([Cn+8C1IM]+), carrying a similar number of carbon atoms but as a single alkyl chain. Our studies show that ionic liquids containing double-chained cations are relatively less cytotoxic and membrane-permeabilizing than the cations bearing a single long alkyl chain.
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Affiliation(s)
- Navleen Kaur
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Sandeep Kumar
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Shiksha
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Gagandeep Kaur Gahlay
- Department of Molecular Biology and Biochemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Venus Singh Mithu
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India.,Department of NMR Based Structural Biology, Max Planck Institute for Biophysical Chemistry, 37077 Göttingen, Germany
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16
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Khan AS, Ibrahim TH, Jabbar NA, Khamis MI, Nancarrow P, Mjalli FS. Ionic liquids and deep eutectic solvents for the recovery of phenolic compounds: effect of ionic liquids structure and process parameters. RSC Adv 2021; 11:12398-12422. [PMID: 35423754 PMCID: PMC8697206 DOI: 10.1039/d0ra10560k] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 03/15/2021] [Indexed: 11/21/2022] Open
Abstract
Water pollution is a severe and challenging issue threatening the sustainable development of human civilization. Besides other pollutants, waste fluid streams contain phenolic compounds. These have an adverse effect on the human health and marine ecosystem due to their toxic, mutagenic, and carcinogenic nature. Therefore, it is necessary to remove such phenolic pollutants from waste stream fluids prior to discharging to the environment. Different methods have been proposed to remove phenolic compounds from wastewater, including extraction using ionic liquids (ILs) and deep eutectic solvent (DES), a class of organic salts having melting point below 100 °C and tunable physicochemical properties. The purpose of this review is to present the progress in utilizing ILs and DES for phenolic compound extraction from waste fluid streams. The effects of IL structural characteristics, such as anion type, cation type, alkyl chain length, and functional groups will be discussed. In addition, the impact of key process parameters such as pH, phenol concentration, phase ratio, and temperature will be also described. More importantly, several ideas for addressing the limitations of the treatment process and improving its efficiency and industrial viability will be presented. These ideas may form the basis for future studies on developing more effective IL-based processes for treating wastewaters contaminated with phenolic pollutants, to address a growing worldwide environmental problem.
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Affiliation(s)
- Amir Sada Khan
- Department of Chemical Engineering, College of Engineering, American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates .,Department of Chemistry, University of Science & Technolgy Banuu-28100 Khyber Pakhthunkhwa Pakistan
| | - Taleb H Ibrahim
- Department of Chemical Engineering, College of Engineering, American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates
| | - Nabil Abdel Jabbar
- Department of Chemical Engineering, College of Engineering, American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates
| | - Mustafa I Khamis
- Department of Biology, Chemistry and Environmental Sciences, American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates
| | - Paul Nancarrow
- Department of Chemical Engineering, College of Engineering, American University of Sharjah P.O. Box 26666 Sharjah United Arab Emirates
| | - Farouq Sabri Mjalli
- Petroleum & Chemical Engineering Department, Sultan Qaboos University Muscat 123 Oman
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17
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Yang DD, Paterna NJ, Senetra AS, Casey KR, Trieu PD, Caputo GA, Vaden TD, Carone BR. Synergistic interactions of ionic liquids and antimicrobials improve drug efficacy. iScience 2021; 24:101853. [PMID: 33364575 PMCID: PMC7753145 DOI: 10.1016/j.isci.2020.101853] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2020] [Revised: 10/08/2020] [Accepted: 11/18/2020] [Indexed: 01/16/2023] Open
Abstract
Combinations of ionic liquids (ILs) with antimicrobial compounds have been shown to produce synergistic activities in model liposomes. In this study, imidazolium chloride-based ILs with alkyl tail length variations are combined with commercially available, small-molecule antimicrobials to examine the potential for combinatorial and synergistic antimicrobial effects on P. aeruginosa, E. coli, S. aureus, and S. cerevisiae. The effects of these treatments in a human cell culture model indicate the cytotoxic limits of ILs paired with antimicrobials. The analysis of these ILs demonstrates that the length of the alkyl chain on the IL molecule is proportional to both antimicrobial activity and cytotoxicity. Moreover, the ILs which exhibit synergy with small-molecule antibiotics appear to be acting in a membrane permeabilizing manner. Collectively, results from these experiments demonstrate an increase in antimicrobial efficacy with specific IL + antimicrobial combinations on microbial cultures while maintaining low cytotoxicity in a mammalian cell culture model.
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Affiliation(s)
- Daniel D. Yang
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA
| | - Nicholas J. Paterna
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA
| | - Alexandria S. Senetra
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA
| | - Kaitlyn R. Casey
- Department of Molecular and Cellular Biosciences, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA
| | - Phillip D. Trieu
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA
| | - Gregory A. Caputo
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA
- Department of Molecular and Cellular Biosciences, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA
| | - Timothy D. Vaden
- Department of Chemistry and Biochemistry, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA
| | - Benjamin R. Carone
- Department of Molecular and Cellular Biosciences, Rowan University, 201 Mullica Hill Road, Glassboro, NJ 08028, USA
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18
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Semenyuta IV, Trush MM, Kovalishyn VV, Rogalsky SP, Hodyna DM, Karpov P, Xia Z, Tetko IV, Metelytsia LO. Structure-Activity Relationship Modeling and Experimental Validation of the Imidazolium and Pyridinium Based Ionic Liquids as Potential Antibacterials of MDR Acinetobacter Baumannii and Staphylococcus Aureus. Int J Mol Sci 2021; 22:ijms22020563. [PMID: 33429999 PMCID: PMC7827895 DOI: 10.3390/ijms22020563] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 12/29/2020] [Accepted: 01/05/2021] [Indexed: 12/31/2022] Open
Abstract
Online Chemical Modeling Environment (OCHEM) was used for QSAR analysis of a set of ionic liquids (ILs) tested against multi-drug resistant (MDR) clinical isolate Acinetobacter baumannii and Staphylococcus aureus strains. The predictive accuracy of regression models has coefficient of determination q2 = 0.66 - 0.79 with cross-validation and independent test sets. The models were used to screen a virtual chemical library of ILs, which was designed with targeted activity against MDR Acinetobacter baumannii and Staphylococcus aureus strains. Seven most promising ILs were selected, synthesized, and tested. Three ILs showed high activity against both these MDR clinical isolates.
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Affiliation(s)
- Ivan V. Semenyuta
- V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, 1 Murmanska Street, 02660 Kyiv, Ukraine; (I.V.S.); (M.M.T.); (V.V.K.); (S.P.R.); (D.M.H.); (L.O.M.)
| | - Maria M. Trush
- V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, 1 Murmanska Street, 02660 Kyiv, Ukraine; (I.V.S.); (M.M.T.); (V.V.K.); (S.P.R.); (D.M.H.); (L.O.M.)
| | - Vasyl V. Kovalishyn
- V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, 1 Murmanska Street, 02660 Kyiv, Ukraine; (I.V.S.); (M.M.T.); (V.V.K.); (S.P.R.); (D.M.H.); (L.O.M.)
| | - Sergiy P. Rogalsky
- V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, 1 Murmanska Street, 02660 Kyiv, Ukraine; (I.V.S.); (M.M.T.); (V.V.K.); (S.P.R.); (D.M.H.); (L.O.M.)
| | - Diana M. Hodyna
- V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, 1 Murmanska Street, 02660 Kyiv, Ukraine; (I.V.S.); (M.M.T.); (V.V.K.); (S.P.R.); (D.M.H.); (L.O.M.)
| | - Pavel Karpov
- Institute of Structural Biology, Helmholtz Zentrum München—German Research Center for Environmental Health (GmbH), Ingolstädter Landstraße 1, D-85764 Neuherberg, Germany; (P.K.); (Z.X.)
| | - Zhonghua Xia
- Institute of Structural Biology, Helmholtz Zentrum München—German Research Center for Environmental Health (GmbH), Ingolstädter Landstraße 1, D-85764 Neuherberg, Germany; (P.K.); (Z.X.)
| | - Igor V. Tetko
- Institute of Structural Biology, Helmholtz Zentrum München—German Research Center for Environmental Health (GmbH), Ingolstädter Landstraße 1, D-85764 Neuherberg, Germany; (P.K.); (Z.X.)
- BIGCHEM GmbH, Unterschleißheim, Valerystr. 49, D-85716 Neuherberg, Germany
- Correspondence: ; Tel.: +49-89-3187-3575
| | - Larisa O. Metelytsia
- V.P. Kukhar Institute of Bioorganic Chemistry and Petrochemistry, National Academy of Science of Ukraine, 1 Murmanska Street, 02660 Kyiv, Ukraine; (I.V.S.); (M.M.T.); (V.V.K.); (S.P.R.); (D.M.H.); (L.O.M.)
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19
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Imidazole and Imidazolium Antibacterial Drugs Derived from Amino Acids. Pharmaceuticals (Basel) 2020; 13:ph13120482. [PMID: 33371256 PMCID: PMC7767166 DOI: 10.3390/ph13120482] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 12/17/2020] [Accepted: 12/17/2020] [Indexed: 11/17/2022] Open
Abstract
The antibacterial activity of imidazole and imidazolium salts is highly dependent upon their lipophilicity, which can be tuned through the introduction of different hydrophobic substituents on the nitrogen atoms of the imidazole or imidazolium ring of the molecule. Taking this into consideration, we have synthesized and characterized a series of imidazole and imidazolium salts derived from L-valine and L-phenylalanine containing different hydrophobic groups and tested their antibacterial activity against two model bacterial strains, Gram-negative E. coli and Gram-positive B. subtilis. Importantly, the results demonstrate that the minimum bactericidal concentration (MBC) of these derivatives can be tuned to fall close to the cytotoxicity values in eukaryotic cell lines. The MBC value of one of these compounds toward B. subtilis was found to be lower than the IC50 cytotoxicity value for the control cell line, HEK-293. Furthermore, the aggregation behavior of these compounds has been studied in pure water, in cell culture media, and in mixtures thereof, in order to determine if the compounds formed self-assembled aggregates at their bioactive concentrations with the aim of determining whether the monomeric species were in fact responsible for the observed antibacterial activity. Overall, these results indicate that imidazole and imidazolium compounds derived from L-valine and L-phenylalanine—with different alkyl lengths in the amide substitution—can serve as potent antibacterial agents with low cytotoxicity to human cell lines.
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20
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Representation of the Structure-A Key Point of Building QSAR/QSPR Models for Ionic Liquids. MATERIALS 2020; 13:ma13112500. [PMID: 32486309 PMCID: PMC7321456 DOI: 10.3390/ma13112500] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/30/2020] [Revised: 05/22/2020] [Accepted: 05/27/2020] [Indexed: 11/28/2022]
Abstract
The process of encoding the structure of chemicals by molecular descriptors is a crucial step in quantitative structure-activity/property relationships (QSAR/QSPR) modeling. Since ionic liquids (ILs) are disconnected structures, various ways of representing their structure are used in the QSAR studies: the models can be based on descriptors either derived for particular ions or for the whole ionic pair. We have examined the influence of the type of IL representation (separate ions vs. ionic pairs) on the model’s quality, the process of the automated descriptors selection and reliability of the applicability domain (AD) assessment. The result of the benchmark study showed that a less precise description of ionic liquid, based on the 2D descriptors calculated for ionic pairs, is sufficient to develop a reliable QSAR/QSPR model with the highest accuracy in terms of calibration as well as validation. Moreover, the process of a descriptors’ selection is more effective when the possible number of variables can be decreased at the beginning of model development. Additionally, 2D descriptors usually demand less effort in mechanistic interpretation and are more convenient for virtual screening studies.
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21
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Chen H, Shen C, Chen Z, Hu J, Wen Y. Disturbance of chiral ionic liquids to phototaxis of Chlamydomonas reinhardtii: regular analysis and mechanism attempt. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:15011-15019. [PMID: 32067170 DOI: 10.1007/s11356-020-07882-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2019] [Accepted: 01/27/2020] [Indexed: 06/10/2023]
Abstract
Given the recent extensive synthesis and application of ionic liquids (ILs), finding a sensitive and visual indicator to provide a fast-initial risk assessment of IL use has become a pressing issue. In this study, we verified that the phototaxis of Chlamydomonas reinhardtii is a valid indicator of the environmental risk associated with chiral ILs L-(+)- and D-(-)-1-butyl-3-methylimidazolium lactate (BMIM L). Briefly, C. reinhardtii was exposed to a 4000-lx side light source for varying lengths of time. Following the allotted exposure time, the algae aggregation was photographed, and then quantitative analysis was conducted using Image-J software to obtain the corresponding relationship between IL stimulation and C. reinhardtii phototaxis. The gray areas from each treatment were measured and the percentage was calculated. After 16 h of side lighting, for control, the percentage of gray areas was - 22%, while for L-(+)- and D-(-)- BMIM L were 17% and 33%, respectively. Then, after 8 h of darkness, where D-(-)-BMIM L and the control showed the positive phototaxis, but the L-(+)-BMIM L-treated group showed virtually no change. This phenomenon is consistent with excessive production of reactive oxygen species (ROS). Moreover, atomic force microscope (AFM) results indicated distinct aggregation between D-(-)- and L-(+)-BMIM L, which caused changes in cell permeability that induced a change in ROS transfer. Furthermore, relationship between phototaxis and changes in cell ultrastructure and photosynthetic efficiency was also investigated. This work demonstrates the potential of phototaxis to serve as a sensitive, convenient, and cost effective qualitative assessment of ILs' toxic impact, with the understanding that quantitative evaluation requires further improvement.
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Affiliation(s)
- Hui Chen
- College of Science and Technology, Ningbo University, Ningbo, 315212, China
| | - Chensi Shen
- College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China
| | - Zunwei Chen
- Department of Veterinary Integrative Biosciences, Texas A&M University, College Station, TX, 77843, USA
| | - Jinxing Hu
- College of Science and Technology, Ningbo University, Ningbo, 315212, China
| | - Yuezhong Wen
- MOE Key Laboratory of Environmental Remediation & Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, 310058, China.
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22
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Development of quantitative structure-property relationship (QSPR) models for predicting the thermal hazard of ionic liquids: A review of methods and models. J Mol Liq 2020. [DOI: 10.1016/j.molliq.2020.112471] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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23
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Abramenko N, Kustov L, Metelytsia L, Kovalishyn V, Tetko I, Peijnenburg W. A review of recent advances towards the development of QSAR models for toxicity assessment of ionic liquids. JOURNAL OF HAZARDOUS MATERIALS 2020; 384:121429. [PMID: 31732345 DOI: 10.1016/j.jhazmat.2019.121429] [Citation(s) in RCA: 46] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2019] [Revised: 09/27/2019] [Accepted: 10/07/2019] [Indexed: 06/10/2023]
Affiliation(s)
- Natalia Abramenko
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Leninsky prospect 47, 119991, Russia; N. Severtsov Institute of Ecology and Evolution, RAS, Moscow, Russia
| | - Leonid Kustov
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Leninsky prospect 47, 119991, Russia; National University of Science and Technology MISiS, Leninsky prosp. 4, Moscow, Russia
| | - Larysa Metelytsia
- Institute of Bioorganic Chemistry & Petrochemistry, National Academy of Science of Ukraine, 1 Murmanska Street, 02660, Kyiv, Ukraine
| | - Vasyl Kovalishyn
- Institute of Bioorganic Chemistry & Petrochemistry, National Academy of Science of Ukraine, 1 Murmanska Street, 02660, Kyiv, Ukraine
| | - Igor Tetko
- Helmholtz Zentrum München - German Research Center for Environmental Health (GmbH), Institute of Structural Biology, BIGCHEM GmbH, Ingolstädter Landstraße 1, b. 60w, D-85764 Neuherberg, Germany
| | - Willie Peijnenburg
- Institute of Environmental Sciences (CML), Leiden University, PO Box 9518, 2300 RA, Leiden, the Netherlands; National Institute of Public Health and the Environment, Center for Safety of Substances and Products, PO Box 1, 3720 BA, Bilthoven, the Netherlands.
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24
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Sardar S, Wilfred CD, Mumtaz A, Leveque JM, Kalsoom S, Gonfa G. Cytoxicity, Hammett acidity and CO2 solubility of AMPS-based organic salts: A comparative analysis of experimental and computational tools. J Mol Struct 2020. [DOI: 10.1016/j.molstruc.2019.127255] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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25
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Sivapragasam M, Moniruzzaman M, Goto M. An Overview on the Toxicological Properties of Ionic Liquids toward Microorganisms. Biotechnol J 2020; 15:e1900073. [PMID: 31864234 DOI: 10.1002/biot.201900073] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2019] [Revised: 11/21/2019] [Indexed: 12/27/2022]
Abstract
Ionic liquids (ILs), a class of materials with unique physicochemical properties, have been used extensively in the fields of chemical engineering, biotechnology, material sciences, pharmaceutics, and many others. Because ILs are very polar by nature, they can migrate into the environment with the possibility of inclusion in the food chain and bioaccumulation in living organisms. However, the chemical natures of ILs are not quintessentially biocompatible. Therefore, the practical uses of ILs must be preceded by suitable toxicological assessments. Among different methods, the use of microorganisms to evaluate IL toxicity provides many advantages including short generation time, rapid growth, and environmental and industrial relevance. This article reviews the recent research progress on the toxicological properties of ILs toward microorganisms and highlights the computational prediction of various toxicity models.
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Affiliation(s)
- Magaret Sivapragasam
- Biotechnology Department, QUEST International University Perak, 30250, Ipoh, Perak, Malaysia
| | - Muhammad Moniruzzaman
- Chemical Engineering Department, Universiti Teknologi PETRONAS, 32610, Seri Iskandar, Perak, Malaysia.,Center of Researches in Ionic Liquids (CORIL), Universiti Teknologi PETRONAS, 32610, Seri Iskandar, Perak, Malaysia
| | - Masahiro Goto
- Department of Applied Chemistry, Graduate School of Engineering, Kyushu University, 744 Moto-oka, Fukuoka, 819-0395, Japan.,Center for Future Chemistry, Kyushu University, Fukuoka, 819-0395, Japan
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26
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Cho CW, Yun YS. Application of general toxic effects of ionic liquids to predict toxicities of ionic liquids to Spodoptera frugiperda 9, Eisenia fetida, Caenorhabditis elegans, and Danio rerio. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2019; 255:113185. [PMID: 31522005 DOI: 10.1016/j.envpol.2019.113185] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 08/19/2019] [Accepted: 09/04/2019] [Indexed: 06/10/2023]
Abstract
Modeling for the toxicity of ionic liquids (ILs) is necessary to fill data gaps for untested chemicals and to understand the relevant mechanisms at the molecular level. In order for many researchers to easily predict toxicity and/or develop some prediction model, simple method(s) based on a single parameter should be proposed. Therefore, previously our group developed a comprehensive toxicity prediction model with unified linear free-energy relationship descriptors to address the single parameter for predicting the toxicities, as follows (Cho et al., 2016b). Log 1/toxicity in the unit of mM= (2.254 Ec - 2.545 Sc + 0.646 Ac - 1.471 Bc + 1.650 Vc + 2.917 J+ - 0.201 Ea + 0.418 Va + 0.131 J-) - 0.709. It is considered that the model can calculate the general toxicological effect of ILs in parenthesis, as it was developed on the basis of numerous toxic effects i.e., 58 toxicity testing methods and about 1600 data points. In order to check the hypothesis, the values calculated by the model were correlated with four different datasets from insect cell line (Spodoptera frugiperda 9), earthworm (Eisenia fetida), nematode (Caenorhabditis elegans), and fish (Danio rerio). The results clearly showed that the calculated values are in good agreement with each dataset. In the case of S. frugiperda 9 cells, the calculated parameters were correlated with log1/LC50 values, measured after 24 h and 48 h incubation, in R2 of 0.67 and 0.88, respectively. The R2 values for the earthworm, nematode, and fish were 0.88, 0.96, and 0.94-0.95, respectively. This study confirmed that the comprehensive model can be simply and accurately used to predict toxicity of ILs.
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Affiliation(s)
- Chul-Woong Cho
- Department of Bioenergy Science and Technology, Chonnam National University, Yongbong-ro 77, Buk-gu, 61186, Gwangju, Republic of Korea; School of Chemical Engineering, Chonbuk National University, 567 Baekje-dearo, Deokjin-gu, Jeonju, 54896, Chonbuk, South Korea
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Chonbuk National University, 567 Baekje-dearo, Deokjin-gu, Jeonju, 54896, Chonbuk, South Korea.
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27
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Chua FJD, Yan W, Zhou Y. The interaction between ionic liquids (ILs) and an enriched ammonia oxidising bacteria (AOB) culture. CHEMOSPHERE 2019; 235:842-848. [PMID: 31284132 DOI: 10.1016/j.chemosphere.2019.07.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2019] [Revised: 06/13/2019] [Accepted: 07/01/2019] [Indexed: 06/09/2023]
Abstract
Ionic liquids (ILs) have attracted attention in recent years due to their "greener" properties compared to conventional organic solvents. However, they may still pose a risk to the environment as their toxicity is not fully understood. Bioremediation of such ILs can be an economically and environmentally friendly approach. Therefore, this study aims to examine the interaction of three ILs (1-dodecylpyridnium chloride [DPy]+Cl, 1-Butyl-3-methylimidazolium chloride [BMIm]+Cl, and 1-Carbamoylmethyl pyridinium chloride [CMPy]+Cl) at different concentrations with an enriched ammonia oxidising bacteria (AOB) culture, and investigate their effects on the ammonia oxidation rate (AOR) as well as their removal and transformation. The results indicated that the longer chain IL [DPy]+Cl had a negative effect on the AOR while [BMIm]+Cl and [CMPy]+Cl enhanced the AOR. However, the IL removal rates displayed the opposite results as [DPy]+Cl was observed with the highest removal. It was found that biosorption played a major role in [DPy]+Cl removal. Biotransformation products for each IL were identified and their pathways were proposed. This study demonstrated that although longer chain ILs have a greater degree of removal, and they are also more toxic to AOB at higher concentration.
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Affiliation(s)
- Feng Jun Desmond Chua
- School of Civil and Environmental Engineering, Nanyang Technological University, 639798, Singapore; Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 637141, Singapore
| | - Wangwang Yan
- Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 637141, Singapore
| | - Yan Zhou
- School of Civil and Environmental Engineering, Nanyang Technological University, 639798, Singapore; Advanced Environmental Biotechnology Centre, Nanyang Environment and Water Research Institute, Nanyang Technological University, 637141, Singapore.
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28
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Sui N, Zhang Z, Zhang J. Alteration between inhibition and stimulation in individual and mixture effects of [amim]Br and [apyr]Br on Aliivibrio fischeri: Time and side-chain dependence. CHEMOSPHERE 2019; 233:292-299. [PMID: 31176130 DOI: 10.1016/j.chemosphere.2019.05.279] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 05/29/2019] [Accepted: 05/29/2019] [Indexed: 06/09/2023]
Abstract
The exposure reality of chemicals is usually in mixtures, the effects of which are usually extrapolated from individual results. Yet, such extrapolation is challenged by the alteration between monotonic concentration-response curves (CRCs) and non-monotonic hormetic CRCs in individual and mixture effects. In the present study, we aimed to investigate the occurrence of such alterations using 1-alkylimidazolium bromide ([amim]Br) and 1-alkylpyridinium bromide ([apyr]Br) ionic liquids (ILs) as model chemicals. Effects of four [amim]Br, four [apyr]Br, and their quaternary mixtures designed by uniform design were measured on Aliivibrio fischeri in a time-dependent fashion. Results showed that the individual [amim]Br showed monotonic CRCs. Their inhibition increased over the length of the side-chain and decreased over the exposure time. The [amim]Br mixtures showed non-monotonic hormetic CRCs, where the stimulations increased over exposure time. The individual [apyr]Br had non-monotonic hormetic CRCs, and their stimulation increased over the length of the side-chain. Meanwhile, the [apyr]Br mixtures had monotonic CRCs without any stimulation. Notably, the positive contributors to the mixture effects were [emim]Br or [epyr]Br which had the shortest side-chain among the components. The findings can facilitate accurate prediction on the environmental effects of ILs with specific considerations on hormetic and mixture effects.
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Affiliation(s)
- Ning Sui
- Ecological Technique and Engineering College, Shanghai Institute of Technology, Shanghai, 201418, PR China
| | - Zhiguo Zhang
- Ecological Technique and Engineering College, Shanghai Institute of Technology, Shanghai, 201418, PR China
| | - Jing Zhang
- Ecological Technique and Engineering College, Shanghai Institute of Technology, Shanghai, 201418, PR China; Guangxi Key Laboratory of Electrochemical and Magnetochemical Functional Materials, Guilin, 541004, PR China.
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29
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Relationship between structure and biodegradability of gemini imidazolium surface active ionic liquids. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2018.12.066] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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30
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Sasaki Y, Eng T, Herbert RA, Trinh J, Chen Y, Rodriguez A, Gladden J, Simmons BA, Petzold CJ, Mukhopadhyay A. Engineering Corynebacterium glutamicum to produce the biogasoline isopentenol from plant biomass hydrolysates. BIOTECHNOLOGY FOR BIOFUELS 2019; 12:41. [PMID: 30858878 PMCID: PMC6391826 DOI: 10.1186/s13068-019-1381-3] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/20/2018] [Accepted: 02/18/2019] [Indexed: 05/10/2023]
Abstract
BACKGROUND Many microbes used for the rapid discovery and development of metabolic pathways have sensitivities to final products and process reagents. Isopentenol (3-methyl-3-buten-1-ol), a biogasoline candidate, has an established heterologous gene pathway but is toxic to several microbial hosts. Reagents used in the pretreatment of plant biomass, such as ionic liquids, also inhibit growth of many host strains. We explored the use of Corynebacterium glutamicum as an alternative host to address these constraints. RESULTS We found C. glutamicum ATCC 13032 to be tolerant to both the final product, isopentenol, as well to three classes of ionic liquids. A heterologous mevalonate-based isopentenol pathway was engineered in C. glutamicum. Targeted proteomics for the heterologous pathway proteins indicated that the 3-hydroxy-3-methylglutaryl-coenzyme A reductase protein, HmgR, is a potential rate-limiting enzyme in this synthetic pathway. Isopentenol titers were improved from undetectable to 1.25 g/L by combining three approaches: media optimization; substitution of an NADH-dependent HmgR homolog from Silicibacter pomeroyi; and development of a C. glutamicum ∆poxB ∆ldhA host chassis. CONCLUSIONS We describe the successful expression of a heterologous mevalonate-based pathway in the Gram-positive industrial microorganism, C. glutamicum, for the production of the biogasoline candidate, isopentenol. We identified critical genetic factors to harness the isopentenol pathway in C. glutamicum. Further media and cultivation optimization enabled isopentenol production from sorghum biomass hydrolysates.
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Affiliation(s)
- Yusuke Sasaki
- Graduate School of Advanced Integrated Studies in Human Survivability, Kyoto University, Sakyo-ku, Kyoto, Japan
- Japan Society for the Promotion of Science, Sakyo-ku, Kyoto, Japan
- Joint BioEnergy Institute, Emeryville, CA USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Thomas Eng
- Joint BioEnergy Institute, Emeryville, CA USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Robin A. Herbert
- Joint BioEnergy Institute, Emeryville, CA USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Jessica Trinh
- Joint BioEnergy Institute, Emeryville, CA USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Yan Chen
- Joint BioEnergy Institute, Emeryville, CA USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Alberto Rodriguez
- Joint BioEnergy Institute, Emeryville, CA USA
- Biomass Science and Conversion Technology Department, Sandia National Laboratories, 7011 East Avenue, Livermore, CA 94550 USA
| | - John Gladden
- Joint BioEnergy Institute, Emeryville, CA USA
- Biomass Science and Conversion Technology Department, Sandia National Laboratories, 7011 East Avenue, Livermore, CA 94550 USA
| | - Blake A. Simmons
- Joint BioEnergy Institute, Emeryville, CA USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Christopher J. Petzold
- Joint BioEnergy Institute, Emeryville, CA USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
| | - Aindrila Mukhopadhyay
- Joint BioEnergy Institute, Emeryville, CA USA
- Biological Systems and Engineering Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
- Environmental Genomics and Systems Biology Division, Lawrence Berkeley National Laboratory, Berkeley, CA USA
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Cao L, Zhu P, Zhao Y, Zhao J. Using machine learning and quantum chemistry descriptors to predict the toxicity of ionic liquids. JOURNAL OF HAZARDOUS MATERIALS 2018; 352:17-26. [PMID: 29567407 DOI: 10.1016/j.jhazmat.2018.03.025] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Revised: 03/02/2018] [Accepted: 03/14/2018] [Indexed: 06/08/2023]
Abstract
Large-scale application of ionic liquids (ILs) hinges on the advancement of designable and eco-friendly nature. Research of the potential toxicity of ILs towards different organisms and trophic levels is insufficient. Quantitative structure-activity relationships (QSAR) model is applied to evaluate the toxicity of ILs towards the leukemia rat cell line (ICP-81). The structures of 57 cations and 21 anions were optimized by quantum chemistry. The electrostatic potential surface area (SEP) and charge distribution area (Sσ-profile) descriptors are calculated and used to predict the toxicity of ILs. The performance and predictive aptitude of extreme learning machine (ELM) model are analyzed and compared with those of multiple linear regression (MLR) and support vector machine (SVM) models. The highest R2 and the lowest AARD% and RMSE of the training set, test set and total set for the ELM are observed, which validates the superior performance of the ELM than that of obtained by the MLR and SVM. The applicability domain of the model is assessed by the Williams plot.
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Affiliation(s)
- Lingdi Cao
- Forschungszentrum Jülich GmbH, Helmholtz Institute Erlangen-Nürnberg for Renewable Energy (IEK-11), Egerlandstr. 3, 91058, Erlangen, Germany
| | - Peng Zhu
- Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano-electronics, Shanghai Jiao Tong University, Shanghai, 200240, China; Department of Chemical Engineering, University of California, Santa Barbara, CA, 93106-5080, USA
| | - Yongsheng Zhao
- Key Laboratory for Thin Film and Microfabrication of Ministry of Education, Department of Micro/Nano-electronics, Shanghai Jiao Tong University, Shanghai, 200240, China; Department of Chemical Engineering, University of California, Santa Barbara, CA, 93106-5080, USA.
| | - Jihong Zhao
- Collaborative Innovation Center of Environmental Pollution Control and Ecological Restoration, Zhengzhou, Henan, 450001, China; Xuchang University, Xuchang, Henan, 461001, China.
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Kumar S, Scheidt HA, Kaur N, Kaur A, Kang TS, Huster D, Mithu VS. Amphiphilic Ionic Liquid-Induced Membrane Permeabilization: Binding Is Not Enough. J Phys Chem B 2018; 122:6763-6770. [DOI: 10.1021/acs.jpcb.8b03733] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Affiliation(s)
- Sandeep Kumar
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Holger A. Scheidt
- Institute for Medical Physics and Biophysics, Leipzig University, Leipzig 04109, Germany
| | - Navleen Kaur
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Anupreet Kaur
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Tejwant S. Kang
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
| | - Daniel Huster
- Institute for Medical Physics and Biophysics, Leipzig University, Leipzig 04109, Germany
| | - Venus S. Mithu
- Department of Chemistry, Guru Nanak Dev University, Amritsar 143005, India
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Zhang M, Wang Y, Zhang H, Cao J, Fei Z, Wang Y. Impact of the alkyl chain length on binding of imidazolium-based ionic liquids to bovine serum albumin. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 196:323-333. [PMID: 29475181 DOI: 10.1016/j.saa.2018.02.040] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/05/2017] [Revised: 02/08/2018] [Accepted: 02/12/2018] [Indexed: 06/08/2023]
Abstract
The effects of six imidazolium-based ionic liquids (ILs) with different alkyl chain length ([CnMim]Cl, n=2, 4, 6, 8, 10, 12) on the structure and functions of bovine serum albumin (BSA) were studied by multi-spectral methods and molecular docking. ILs with the longer alkyl chain length have the stronger binding interaction with BSA and the greater conformational damage to protein. The effects of ILs on the functional properties of BSA were further studied by the determination of non-enzyme esterase activity, β-fibrosis and other properties of BSA. The thermal stability of BSA was reduced, the rate of the formation of beta sheet structures of BSA was lowered, and the esterase-like activity of BSA were decreased with the increase of ILs concentration. Simultaneous molecular modeling technique revealed the favorable binding sites of ILs on protein. The hydrophobic force and polar interactions were the mainly binding forces of them. The calculated results are in a good agreement with the spectroscopic experiments. These studies on the impact of the alkyl chain length on binding of imidazolium-based ionic liquids to BSA are of great significance for understanding and developing the application of ionic liquid in life and physiological system.
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Affiliation(s)
- Mengyue Zhang
- Institute of Environmental Toxicology and Environmental Ecology, Yancheng Teachers University, Yancheng City, Jiangsu Province 224051, People's Republic of China
| | - Ying Wang
- Institute of Environmental Toxicology and Environmental Ecology, Yancheng Teachers University, Yancheng City, Jiangsu Province 224051, People's Republic of China
| | - Hongmei Zhang
- Institute of Environmental Toxicology and Environmental Ecology, Yancheng Teachers University, Yancheng City, Jiangsu Province 224051, People's Republic of China
| | - Jian Cao
- Institute of Environmental Toxicology and Environmental Ecology, Yancheng Teachers University, Yancheng City, Jiangsu Province 224051, People's Republic of China
| | - Zhenghao Fei
- Institute of Environmental Toxicology and Environmental Ecology, Yancheng Teachers University, Yancheng City, Jiangsu Province 224051, People's Republic of China; Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng Teachers University, Yancheng City, Jiangsu Province 224051, People's Republic of China
| | - Yanqing Wang
- Institute of Environmental Toxicology and Environmental Ecology, Yancheng Teachers University, Yancheng City, Jiangsu Province 224051, People's Republic of China; Jiangsu Provincial Key Laboratory of Coastal Wetland Bioresources and Environmental Protection, Yancheng Teachers University, Yancheng City, Jiangsu Province 224051, People's Republic of China.
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He W, Yan F, Jia Q, Xia S, Wang Q. QSAR models for describing the toxicological effects of ILs against Staphylococcus aureus based on norm indexes. CHEMOSPHERE 2018; 195:831-838. [PMID: 29289911 DOI: 10.1016/j.chemosphere.2017.12.091] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2017] [Revised: 12/12/2017] [Accepted: 12/13/2017] [Indexed: 06/07/2023]
Abstract
The hazardous potential of ionic liquids (ILs) is becoming an issue of great concern due to their important role in many industrial fields as green agents. The mathematical model for the toxicological effects of ILs is useful for the risk assessment and design of environmentally benign ILs. The objective of this work is to develop QSAR models to describe the minimal inhibitory concentration (MIC) and minimal bactericidal concentration (MBC) of ILs against Staphylococcus aureus (S. aureus). A total of 169 and 101 ILs with MICs and MBCs, respectively, are used to obtain multiple linear regression models based on matrix norm indexes. The norm indexes used in this work are proposed by our research group and they are first applied to estimate the antibacterial toxicity of these ILs against S. aureus. These two models precisely and reliably calculated the IL toxicities with a square of correlation coefficient (R2) of 0.919 and a standard error of estimate (SE) of 0.341 (in log unit of mM) for pMIC, and an R2 of 0.913 and SE of 0.282 for pMBC.
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Affiliation(s)
- Wensi He
- School of Chemical Engineering and Material Science, Tianjin University of Science and Technology, 13St. 29, TEDA, 300457 Tianjin, PR China
| | - Fangyou Yan
- School of Chemical Engineering and Material Science, Tianjin University of Science and Technology, 13St. 29, TEDA, 300457 Tianjin, PR China.
| | - Qingzhu Jia
- School of Marine and Environmental Science, Tianjin University of Science and Technology, 13St. 29, TEDA, 300457 Tianjin, PR China
| | - Shuqian Xia
- Key Laboratory for Green Chemical Technology of the State Education Ministry, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), School of Chemical Engineering and Technology, Tianjin University, 300072 Tianjin, PR China
| | - Qiang Wang
- School of Chemical Engineering and Material Science, Tianjin University of Science and Technology, 13St. 29, TEDA, 300457 Tianjin, PR China
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Ghanem OB, Shah SN, Lévêque JM, Mutalib MIA, El-Harbawi M, Khan AS, Alnarabiji MS, Al-Absi HRH, Ullah Z. Study of the antimicrobial activity of cyclic cation-based ionic liquids via experimental and group contribution QSAR model. CHEMOSPHERE 2018; 195:21-28. [PMID: 29248749 DOI: 10.1016/j.chemosphere.2017.12.018] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2017] [Revised: 11/29/2017] [Accepted: 12/04/2017] [Indexed: 06/07/2023]
Abstract
Over the past decades, Ionic liquids (ILs) have gained considerable attention from the scientific community in reason of their versatility and performance in many fields. However, they nowadays remain mainly for laboratory scale use. The main barrier hampering their use in a larger scale is their questionable ecological toxicity. This study investigated the effect of hydrophobic and hydrophilic cyclic cation-based ILs against four pathogenic bacteria that infect humans. For that, cations, either of aromatic character (imidazolium or pyridinium) or of non-aromatic nature, (pyrrolidinium or piperidinium), were selected with different alkyl chain lengths and combined with both hydrophilic and hydrophobic anionic moieties. The results clearly demonstrated that introducing of hydrophobic anion namely bis((trifluoromethyl)sulfonyl)amide, [NTF2] and the elongation of the cations substitutions dramatically affect ILs toxicity behaviour. The established toxicity data [50% effective concentration (EC50)] along with similar endpoint collected from previous work against Aeromonas hydrophila were combined to developed quantitative structure-activity relationship (QSAR) model for toxicity prediction. The model was developed and validated in the light of Organization for Economic Co-operation and Development (OECD) guidelines strategy, producing good correlation coefficient R2 of 0.904 and small mean square error (MSE) of 0.095. The reliability of the QSAR model was further determined using k-fold cross validation.
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Affiliation(s)
- Ouahid Ben Ghanem
- Faculty of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak Malaysia.
| | - Syed Nasir Shah
- Department of Chemical Engineering, COMSATS Institute of Information Technology, Lahore, Pakistan
| | | | - M I Abdul Mutalib
- Faculty of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak Malaysia
| | - Mohanad El-Harbawi
- Chemical Engineering Department, King Saud University, Riyadh 11421, Saudi Arabia
| | - Amir Sada Khan
- Centre of Research in Ionic Liquids (CORIL), Department of Chemical Engineering, Universiti Teknologi PETRONAS, 31750 Tronoh, Perak, Malaysia; Department of Chemistry, University of Science and Technology, Bannu 28100, Khyber Pakhtunkhwa, Pakistan
| | - Mohamad Sahban Alnarabiji
- Faculty of Chemical Engineering, Universiti Teknologi PETRONAS, Bandar Seri Iskandar, 31750 Tronoh, Perak Malaysia
| | - Hamada R H Al-Absi
- Faculty of Engineering, Computing and Science, Swinburne University of Technology Sarawak Campus, Jalan Simpang Tiga, 93350 Kuching, Sarawak, Malaysia
| | - Zahoor Ullah
- Department for Management of Science and Technology Development, Ton Duc Thang University, Ho Chi Minh City, Vietnam; Faculty of Applied Sciences, Ton Duc Thang University, Ho Chi Minh City, Vietnam
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37
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Hodyna D, Kovalishyn V, Semenyuta I, Blagodatnyi V, Rogalsky S, Metelytsia L. Imidazolium ionic liquids as effective antiseptics and disinfectants against drug resistant S. aureus: In silico and in vitro studies. Comput Biol Chem 2018; 73:127-138. [PMID: 29494924 DOI: 10.1016/j.compbiolchem.2018.01.012] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2017] [Revised: 01/29/2018] [Accepted: 01/30/2018] [Indexed: 11/26/2022]
Abstract
This paper describes Quantitative Structure-Activity Relationships (QSAR) studies, molecular docking and in vitro antibacterial activity of several potent imidazolium-based ionic liquids (ILs) against S. aureus ATCC 25923 and its clinical isolate. Small set of 131 ILs was collected from the literature and uploaded in the OCHEM database. QSAR methodologies used Associative Neural Networks and Random Forests (WEKA-RF) methods. The predictive ability of the models was tested through cross-validation, giving cross-validated coefficients q2 = 0.82-0.87 for regression models and overall prediction accuracies of 80-82.1% for classification models. The proposed QSAR models are freely available online on OCHEM server at https://ochem.eu/article/107364 and can be used for estimation of antibacterial activity of new imidazolium-based ILs. A series of synthesized 1,3-dialkylimidazolium ILs with predicted activity were evaluated in vitro. The high activity of 7 ILs against S. aureus strain and its clinical isolate was measured and thereafter analyzed by the molecular docking to prokaryotic homologue of a eukaryotic tubulin FtsZ.
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Affiliation(s)
- Diana Hodyna
- Department of Medical and Biological Researches, Institute of Bioorganic Chemistry and Petrochemistry, NAS of Ukraine, Kyiv-94, 02160, Ukraine.
| | - Vasyl Kovalishyn
- Department of Medical and Biological Researches, Institute of Bioorganic Chemistry and Petrochemistry, NAS of Ukraine, Kyiv-94, 02160, Ukraine
| | - Ivan Semenyuta
- Department of Medical and Biological Researches, Institute of Bioorganic Chemistry and Petrochemistry, NAS of Ukraine, Kyiv-94, 02160, Ukraine
| | - Volodymyr Blagodatnyi
- Department of Microbiology and Epidemiology, Shupyk National Medical Academy of Postgraduate Education, Kyiv 04112, Ukraine
| | - Sergiy Rogalsky
- Laboratory of Modification of Polymers, Institute of Bioorganic Chemistry and Petrochemistry, NAS of Ukraine, Kyiv 02160, Ukraine
| | - Larisa Metelytsia
- Department of Medical and Biological Researches, Institute of Bioorganic Chemistry and Petrochemistry, NAS of Ukraine, Kyiv-94, 02160, Ukraine
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Environmental Concerns Regarding Ionic Liquids in Biotechnological Applications. ADVANCES IN BIOCHEMICAL ENGINEERING/BIOTECHNOLOGY 2018; 168:241-328. [DOI: 10.1007/10_2018_79] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Zhu G, Gao X, Wang X, Wang J, Fan J. Influence of hydrogen bond accepting ability of anions on the adsorption performance of ionic liquid surface molecularly imprinted polymers. J Chromatogr A 2017; 1532:40-49. [PMID: 29221868 DOI: 10.1016/j.chroma.2017.11.057] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2017] [Revised: 11/21/2017] [Accepted: 11/24/2017] [Indexed: 11/28/2022]
Abstract
To illuminate the influence mechanism of anionic structure of ionic liquids (ILs) on the adsorption performance of surface molecularly imprinted polymers (MIPs), in this work, six newly designed MIPs were prepared on the surface of amino-poly(styrene-divinylbenzene) particles by using imidazolium ILs with the same cation [C4mim]+ but different anions (Cl, CH3SO3, PF6, BF4, C4F7O2, C4F9SO3) as template molecules, methacrylic acid as functional monomer, and ethylene dimethacrylate as cross-linker. The resulting MIP materials were characterized by IR and SEM, and the influence of hydrogen bond accepting ability of anions on the adsorption performance of the MIPs for the ILs was investigated in acetonitrile. It was found that adsorption capacity of the MIPs towards the ILs decreased in the order MIP[C4mim][Cl] > MIP[C4mim][C4F7O2] ≥ MIP[C4mim][BF4] and MIP[C4mim][CH3SO3] > MIP[C4mim][C4F9SO3] > MIP[C4mim][PF6], which is in good agreement with the ability of anions of the ILs to form hydrogen bonds. Ultraviolet, 1H-NMR and 35Cl-NMR spectroscopy was then used to study the interactions of anions of the ILs with the functional monomer. It was found that the hydrogen bond interaction between anions of the ILs and acidic proton of the functional monomer was the main driving force for the high adsorption selectivity of the imprinted polymers, and the stronger hydrogen bond interaction indicates higher binding capacity and higher selectivity of the polymers towards the ILs. It was also verified that the ILs with stronger hydrogen bond accepting ability of anions could be selectively extracted by the corresponding IL-MIPs. These results may provide new insight into the recognition mechanism of MIPs for ILs, and are also useful for the rational design of this new class of imprinting materials.
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Affiliation(s)
- Guifen Zhu
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China
| | - Xia Gao
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China; School of Public Health, Xinxiang Medical University, Xinxiang, Henan 453003, PR China
| | - Xiaolong Wang
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China
| | - Jianji Wang
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China
| | - Jing Fan
- School of Environment, Henan Key Laboratory for Environmental Pollution Control, Key Laboratory for Yellow River and Huai River Water Environmental Pollution Control, Ministry of Education, Henan Normal University, Xinxiang, Henan 453007, PR China.
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Li W, Xu G. Enhancement of anaerobic digestion of grass by pretreatment with imidazolium-based ionic liquids. ENVIRONMENTAL TECHNOLOGY 2017; 38:1843-1851. [PMID: 27654512 DOI: 10.1080/09593330.2016.1238963] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 08/25/2016] [Indexed: 06/06/2023]
Abstract
In this work, the toxicity of imidazolium-based ionic liquids (ILs) and the enhancement of high-solid anaerobic digestion by pretreatment were studied. Compared with [Bmim]Cl, [Bmim]OAc and [Bmim]BF4, [Bmim]PF6 had the highest toxicity. When the mass ratio of [Bmim]PF6 to grass was higher than 1:10, biogas was not produced within 30 days. The ability to remove lignin and hemicellulose followed the sequence of [Bmim]OAc, [Bmim]Cl, [Bmim]BF4 and [Bmim]PF6. The crystallinity index of grass pretreated with [Bmim]OAc, [Bmim]Cl, [Bmim]BF4 and [Bmim]PF6 reduced by 73.83%, 54.44%, 17.52% and 7.47%, respectively. The pretreatment with ILs enhanced the methane yield of grass by reducing crystallinity and particle size. The grass pretreated with [Bmim]OAc had the highest methane yield, about 221 mL/g volatile solids, due to its good lignin removal ability and relative low toxicity. After 10 times recycling, the cumulative methane yield of grass pretreated by recycled [Bmim]OAc decreased by 11.95%.
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Affiliation(s)
- W Li
- a NUS Environment Research Institute , National University of Singapore , Singapore , Singapore
- b State Key Laboratory of Multi-Phase Complex Systems , Institute of Process Engineering, Chinese Academy of Sciences , Beijing , People's Republic of China
| | - G Xu
- b State Key Laboratory of Multi-Phase Complex Systems , Institute of Process Engineering, Chinese Academy of Sciences , Beijing , People's Republic of China
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Costa SPF, Azevedo AMO, Pinto PCAG, Saraiva MLMFS. Environmental Impact of Ionic Liquids: Recent Advances in (Eco)toxicology and (Bio)degradability. CHEMSUSCHEM 2017; 10:2321-2347. [PMID: 28394478 DOI: 10.1002/cssc.201700261] [Citation(s) in RCA: 130] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/12/2017] [Revised: 04/04/2017] [Indexed: 05/05/2023]
Abstract
This Review aims to integrate the most recent and pertinent data available on the (bio)degradability and toxicity of ionic liquids for global and critical analysis and on the conscious use of these compounds on a large scale thereafter. The integrated data will enable focus on the recognition of toxicophores and on the way the community has been dealing with them, with the aim to obtain greener and safer ionic liquids. Also, an update of the most recent biotic and abiotic methods developed to overcome some of these challenging issues will be presented. The review structure aims to present a potential sequence of events that can occur upon discharging ionic liquids into the environment and the potential long-term consequences.
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Affiliation(s)
- Susana P F Costa
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
| | - Ana M O Azevedo
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
| | - Paula C A G Pinto
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
- A3D-Association for Drug Discovery and Development, Rua do Baixeiro n° 38, Aveiro, Portugal
| | - M Lúcia M F S Saraiva
- LAQV, Requimte, Departamento de Ciências Químicas, Laboratório de Química Aplicada, Faculdade de Farmácia, Universidade do Porto, Rua Jorge Viterbo Ferreira 228, 4050-313, Porto, Portugal
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Weyhing-Zerrer N, Gundolf T, Kalb R, Oßmer R, Rossmanith P, Mester P. Predictability of ionic liquid toxicity from a SAR study on different systematic levels of pathogenic bacteria. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2017; 139:394-403. [PMID: 28189781 DOI: 10.1016/j.ecoenv.2017.01.055] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 01/24/2017] [Accepted: 01/31/2017] [Indexed: 06/06/2023]
Abstract
Ionic liquids (ILs), a new class of solvents with unique and tunable physicochemical properties, were initially envisioned as working alternatives to traditional organic solvents. However, they have now proven to have a wide range of alternative chemical and biochemical applications. Due to their increasing use, environmental and toxicity concerns are growing, but resolutions are hindered by the sheer number of possible variants. In order to assess and possibly predict IL-toxicity, a structure-activity relationship (SAR) approach was adopted using defined structural motifs. These included varied cationic alkyl side-chain lengths, cation lipophilicity and diverse anion effects. The predictive powers of such SARs in respect of antibacterial effects were compared using a total of 28 ILs on six Gram-negative and six Gram-positive pathogenic bacteria. Endpoints were minimum inhibitory (MIC) and minimum bactericidal concentrations (MBC). Results indicate that while certain limited IL-toxicity responses in bacteria can be predicted from SARs, they caution that predictions cannot be generalized across species. This study demonstrates the complex species-specific nature of IL-toxicity and the current limitations of SAR predictability.
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Affiliation(s)
| | - Tobias Gundolf
- Christian Doppler Laboratory for Monitoring of Microbial Contaminants, Department of Veterinary Public Health and Food Science, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria
| | - Roland Kalb
- Proionic GmbH, Parkring 18, 8074 Grambach, Austria
| | - Rolf Oßmer
- Merck KGaA, Life Science, Frankfurter Str. 250, 64293 Darmstadt, Germany
| | - Peter Rossmanith
- Christian Doppler Laboratory for Monitoring of Microbial Contaminants, Department of Veterinary Public Health and Food Science, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria; Institute of Milk Hygiene, Milk Technology and Food Science, Department of Veterinary Public Health and Food Science, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria
| | - Patrick Mester
- Christian Doppler Laboratory for Monitoring of Microbial Contaminants, Department of Veterinary Public Health and Food Science, University of Veterinary Medicine, Veterinaerplatz 1, 1210 Vienna, Austria.
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44
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Zhao X, Pan Y, Jiang J, Xu S, Jiang J, Ding L. Thermal Hazard of Ionic Liquids: Modeling Thermal Decomposition Temperatures of Imidazolium Ionic Liquids via QSPR Method. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.6b04762] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Xinyue Zhao
- Jiangsu Key Laboratory of
Hazardous Chemicals Safety and Control, College of Safety Science
and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Yong Pan
- Jiangsu Key Laboratory of
Hazardous Chemicals Safety and Control, College of Safety Science
and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Juncheng Jiang
- Jiangsu Key Laboratory of
Hazardous Chemicals Safety and Control, College of Safety Science
and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Shuangyan Xu
- Jiangsu Key Laboratory of
Hazardous Chemicals Safety and Control, College of Safety Science
and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Jiajia Jiang
- Jiangsu Key Laboratory of
Hazardous Chemicals Safety and Control, College of Safety Science
and Engineering, Nanjing Tech University, Nanjing 210009, China
| | - Li Ding
- Jiangsu Key Laboratory of
Hazardous Chemicals Safety and Control, College of Safety Science
and Engineering, Nanjing Tech University, Nanjing 210009, China
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45
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Ghanem OB, Mutalib MIA, Lévêque JM, El-Harbawi M. Development of QSAR model to predict the ecotoxicity of Vibrio fischeri using COSMO-RS descriptors. CHEMOSPHERE 2017; 170:242-250. [PMID: 28006757 DOI: 10.1016/j.chemosphere.2016.12.003] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2016] [Revised: 11/16/2016] [Accepted: 12/01/2016] [Indexed: 06/06/2023]
Abstract
Ionic liquids (ILs) are class of solvent whose properties can be modified and tuned to meet industrial requirements. However, a high number of potentially available cations and anions leads to an even increasing members of newly-synthesized ionic liquids, adding to the complexity of understanding on their impact on aquatic organisms. Quantitative structure activity∖property relationship (QSAR∖QSPR) technique has been proven to be a useful method for toxicity prediction. In this work,σ-profile descriptors were used to build linear and non-linear QSAR models to predict the ecotoxicities of a wide variety of ILs towards bioluminescent bacterium Vibrio fischeri. Linear model was constructed using five descriptors resulting in high accuracy prediction of 0.906. The model performance and stability were ascertained using k-fold cross validation method. The selected descriptors set from the linear model was then used in multilayer perceptron (MLP) technique to develop the non-linear model, the accuracy of the model was further enhanced achieving high correlation coefficient with the lowest value being 0.961 with the highest mean square error of 0.157.
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Affiliation(s)
- Ouahid Ben Ghanem
- Faculty of Chemical Engineering, Universiti Teknologi Petronas, Bandar Seri Iskandar, 31750, Tronoh, Perak, Malaysia.
| | - M I Abdul Mutalib
- Faculty of Chemical Engineering, Universiti Teknologi Petronas, Bandar Seri Iskandar, 31750, Tronoh, Perak, Malaysia
| | - Jean-Marc Lévêque
- Fundamental & Applied Sciences Department, Universiti Teknologi Petronas, 31750, Bandar Seri Iskandar, Tronoh, Perak, Malaysia
| | - Mohanad El-Harbawi
- Chemical Engineering Department, King Saud University, Riyadh, 11421, Saudi Arabia
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46
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Cho CW, Stolte S, Yun YS. Comprehensive approach for predicting toxicological effects of ionic liquids on several biological systems using unified descriptors. Sci Rep 2016; 6:33403. [PMID: 27624396 PMCID: PMC5022054 DOI: 10.1038/srep33403] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 08/24/2016] [Indexed: 01/08/2023] Open
Abstract
The challenge and opportunity for design of environmentally-benign ionic liquids (ILs) would start from prediction of their toxicological effects on several endpoints solely based on the structural formulas. Especially, a comprehensive yet simple equation able to predict several biological responses to IL toxicity is of much advantage. Therefore, based on 50 toxicity testing systems on ILs a comprehensively approachable prediction method was developed. For the modelling, approximately 1600 toxicity values measured by several biological systems and an amended linear free energy relationship (LFER) model were used. Since the toxicological activities of an IL could be differently described according to sensitivity of toxicity testing systems, the sensitivity of each of toxicity testing systems was also estimated in the modelling. By statistical analysis with the calculated descriptors, a LFER model was built. Also the sensitivity value of each system on the basis of the comprehensively approachable model was numerically estimated. In results, it was observed that the combination of single model and sensitivity terms was able to predict each of 50 toxicological effects of ILs with R(2) of 0.593~0.978, and SE of 0.098~0.699 log unit, and the total data set with R(2) of 0.901 and SE of 0.426 log unit.
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Affiliation(s)
- Chul-Woong Cho
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea
| | - Stefan Stolte
- Centre for Environmental Research and Sustainable Technology (UFT), University of Bremen, Leobener Straße, 28359, Bremen, Germany
- Department of Environmental Analysis, Faculty of Chemistry, University of Gdaňsk sk ul, Wita Stwosza 63, 80-308, Gdaňsk, Poland
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, South Korea
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47
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Gonfa G, Bustam MA, Shariff AM, Muhammad N, Ullah S. Quantitative structure–activity relationships (QSARs) for estimation of activity coefficient at infinite dilution of water in ionic liquids for natural gas dehydration. J Taiwan Inst Chem Eng 2016. [DOI: 10.1016/j.jtice.2016.06.027] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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48
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Understanding the physical properties, toxicities and anti-microbial activities of choline-amino acid-based salts: Low-toxic variants of ionic liquids. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.05.046] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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49
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Cho CW, Park JS, Stolte S, Yun YS. Modelling for antimicrobial activities of ionic liquids towards Escherichia coli, Staphylococcus aureus and Candida albicans using linear free energy relationship descriptors. JOURNAL OF HAZARDOUS MATERIALS 2016; 311:168-175. [PMID: 26974242 DOI: 10.1016/j.jhazmat.2016.03.006] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 02/26/2016] [Accepted: 03/03/2016] [Indexed: 06/05/2023]
Abstract
To predict antimicrobial activities i.e., minimal inhibitory concentration (MIC) and minimal biocidal concentration (MBC) for ionic liquids (ILs) against Escherichia coli, Staphylococcus aureus and Candida albicans, six quantitative structure-activity relationship (QSAR) models were developed using linear free energy relationship (LFER) descriptors calculated by density functional theory and conductor screening model. The LFER descriptors are excess molar refraction, dipolarity/polarizability, H-bonding acidity, H-bonding basicity, McGowan volume, cationic interaction, and anionic interaction. By excluding some descriptors with ignorable contributions to training set, components of the QSAR models were simplified. Their estimated predictabilities were in R(2)=0.900, standard error (SE; in log unit of μM)=0.430 for log 1/MIC of E. coli, R(2)=0.934, SE=0.370 for log 1/MBC of E. coli, R(2)=0.910, SE=0.470 for log 1/MIC of S. aureus, R(2)=0.947, SE=0.350 for log 1/MBC of S. aureus, R(2)=0.892, SE=0.362 for log 1/MIC of C. albicans and R(2)=0.803, SE=0.233 for log 1/MBC of C. albicans. Then, except for log 1/MBC of C. albicans due to lack of data points, the models were validated by comparing between observed and calculated values of test set; its checked correlations were all within R(2) of 0.921.
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Affiliation(s)
- Chul-Woong Cho
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea, Republic of Korea
| | - Jeong-Soo Park
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea, Republic of Korea
| | - Stefan Stolte
- Centre for Environmental Research and Sustainable Technology (UFT), University of Bremen, Leobener Straße, 28359 Bremen, Germany; Department of Environmental Analysis, Faculty of Chemistry, University of Gdańsk, ul.Wita Stwosza 63, 80-308 Gdańsk, Poland.
| | - Yeoung-Sang Yun
- School of Chemical Engineering, Chonbuk National University, 567 Beakje-dearo, Deokjin-gu, Jeonju, Jeonbuk 561-756, Republic of Korea, Republic of Korea.
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50
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Das RN, Roy K. Computation of chromatographic lipophilicity parameter logk0 of ionic liquid cations from “ETA” descriptors: Application in modeling of toxicity of ionic liquids to pathogenic bacteria. J Mol Liq 2016. [DOI: 10.1016/j.molliq.2016.02.013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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