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Kadsanit N, Worsawat P, Sakonsinsiri C, McElroy CR, Macquarrie D, Noppawan P, Hunt AJ. Sustainable methods for the carboxymethylation and methylation of ursolic acid with dimethyl carbonate under mild and acidic conditions. RSC Adv 2024; 14:16921-16934. [PMID: 38799212 PMCID: PMC11124730 DOI: 10.1039/d4ra02122c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Accepted: 05/07/2024] [Indexed: 05/29/2024] Open
Abstract
Ursolic acid is a triterpene plant extract that exhibits significant potential as an anti-cancer, anti-tumour, and anti-inflammatory agent. Its direct use in the pharmaceutical industry is hampered by poor uptake of ursolic acid in the human body coupled with rapid metabolism causing a decrease in bioactivity. Modification of ursolic acid can overcome such issues, however, use of toxic reagents, unsustainable synthetic routes and poor reaction metrics have limited its potential. Herein, we demonstrate the first reported carboxymethylation and/or methylation of ursolic acid with dimethyl carbonate (DMC) as a green solvent and sustainable reagent under acidic conditions. The reaction of DMC with ursolic acid, in the presence of PTSA, ZnCl2, or H2SO4-SiO2 yielded the carboxymethylation product 3β-[[methoxy]carbonyl]oxyurs-12-en-28-oic acid, the methylation product 3β-methoxyurs-12-en-28-oic acid and the dehydration product urs-2,12-dien-28-oic acid. PTSA demonstrated high conversion and selectivity towards the previously unreported carboxymethylation of ursolic acid, while the application of formic acid in the system led to formylation of ursolic acid (3β-formylurs-12-en-28-oic acid) in quantitative yields via esterification, with DMC acting solely as a solvent. Meanwhile, the methylation product of ursolic acid, 3β-methoxyurs-12-en-28-oic acid, was successfully synthesised with FeCl3, demonstrating exceptional conversion and selectivity, >99% and 99%, respectively. Confirmed with the use of qualitative and quantitative green metrics, this result represents a significant improvement in conversion, selectivity, safety, and sustainability over previously reported methods of ursolic acid modification. It was demonstrated that these methods could be applied to other triterpenoids, including corosolic acid. The study also explored the potential pharmaceutical applications of ursolic acid, corosolic acid, and their derivatives, particularly in anti-inflammatory, anti-cancer, and anti-tumour treatments, using molecular ADMET and docking methods. The methods developed in this work have led to the synthesis of novel molecules, thus creating opportunities for the future investigation of biological activity and the modification of a wide range of triterpenoids applying acidic DMC systems to deliver novel active pharmaceutical intermediates.
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Affiliation(s)
- Nuttapong Kadsanit
- Materials Chemistry Research Center (MCRC), Department of Chemistry and Centre of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University Khon Kaen 40002 Thailand
| | - Pattamabhorn Worsawat
- Materials Chemistry Research Center (MCRC), Department of Chemistry and Centre of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University Khon Kaen 40002 Thailand
| | - Chadamas Sakonsinsiri
- Department of Biochemistry, Faculty of Medicine, Khon Kaen University Khon Kaen 40002 Thailand
| | - Con R McElroy
- School of Chemistry, University of Lincoln Brayford Pool Campus Lincoln LN6 7TS UK
- Green Chemistry Centre of Excellence, Department of Chemistry, University of York Heslington York YO10 5DD UK
| | - Duncan Macquarrie
- Green Chemistry Centre of Excellence, Department of Chemistry, University of York Heslington York YO10 5DD UK
| | - Pakin Noppawan
- Department of Chemistry, Faculty of Science, Mahasarakham University Maha Sarakham 44150 Thailand
| | - Andrew J Hunt
- Materials Chemistry Research Center (MCRC), Department of Chemistry and Centre of Excellence for Innovation in Chemistry, Faculty of Science, Khon Kaen University Khon Kaen 40002 Thailand
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Saleem I, Sheikh A, Khan AY, Ahmed S, Abbas M. Physicochemical properties of ammonium acetate / propionic acid as a novel deep eutectic solvent and its binary mixtures with water in (298.15-353.15) K range. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2024; 313:124144. [PMID: 38508073 DOI: 10.1016/j.saa.2024.124144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 02/13/2024] [Accepted: 03/09/2024] [Indexed: 03/22/2024]
Abstract
Emergence of deep eutectic solvents as potential replacements for volatile organic solvents has attracted interest of the scientific community in diverse fields of applications. Compared to ionic liquids, which exhibit similarity in many respects with this new class of green solvents, deep eutectic solvents (DESs) show low toxicity, and are easy to prepare from cheap and abundantly available starting materials. Knowledge of physicochemical properties of DESs is a prerequisite for their safe applications in technological fields and to understand the nature of interactions present in these systems. Although physicochemical properties of choline chloride based DESs are widely investigated, similar information on ammonium acetate based DESs is scant. In this work, a novel ammonium acetate/propionic acid deep eutectic solvent (AA/PA DES) is reported which is prepared by mixing ammonium acetate (AA) and propionic acid (PA) in the 1:3 mol ratio and characterized by FTIR, 1H and 13C NMR, TGA and DSC techniques. The density (ρ), sound velocity (u), viscosity (η) and conductivity (κ) of the pure DES and its binary mixtures with water are investigated over the entire composition range and temperatures (298.15-353.15) K. The excess properties, VmE, KSE, Δη, and ΔG*E are calculated and corelated using Redlich-Kister equation (RKE). Temperature dependence of conductivity and viscosity is satisfactorily described by the Vogel - Fulcher - Tamman (VFT) equation rather than Arrhenius equation. The pure DES shows a wide electrochemical potential window ranging from - 1000 mV to + 1000 mV, which coupled with its better solubilizing characteristics, could be exploited for electrochemical work.
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Affiliation(s)
- Iqra Saleem
- Department of Chemistry, Forman Christian College (A Chartered University), Lahore, Pakistan
| | - Aafia Sheikh
- Department of Chemistry, Forman Christian College (A Chartered University), Lahore, Pakistan; Department of Chemistry, Government College Women University, Sialkot, Pakistan
| | - Athar Yaseen Khan
- Department of Chemistry, Forman Christian College (A Chartered University), Lahore, Pakistan.
| | - Safeer Ahmed
- Department of Chemistry, Quid-i-Azam University, Islamabad, Pakistan
| | - Muhammad Abbas
- Department of Chemistry, Forman Christian College (A Chartered University), Lahore, Pakistan
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3
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Weissinger H, Knetzger N, Cleve C, Lotz C. Impedance-based in vitro eye irritation testing enables the categorization of diluted chemicals. Sci Rep 2024; 14:6216. [PMID: 38486034 PMCID: PMC10940615 DOI: 10.1038/s41598-024-56191-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 03/04/2024] [Indexed: 03/18/2024] Open
Abstract
Products containing chemicals with eye irritation potential need to be labeled with the respective hazard symbol. To avoid the testing of numerous dilutions of chemicals on animals, their labeling is directed by a theoretical approach. In this report, a previously described in vitro tissue model of the cornea based on human epithelial cells was used for eye irritation testing of dilutions. As a sensitive and non-destructive method to analyze the barrier function of the epithelium, impedance spectroscopy was applied. Moreover, the morphology and viability of the epithelial models were assessed. We tested four chemicals that, neatly, cause severe damage to the eye: tetrahydrofuran, acetic acid, diethylethanolamine, and benzalkonium chloride. With our test method, we were able to determine the concentrations of the chemicals which are critical for the integrity of the cornea. The threshold was < 0.1% for the most and > 5% for the least toxic substance. The described test system is not only an alternative for animal models but also for the theoretical examination of the hazard potential of diluted chemicals. By using the advantages of tissue engineering and non-destructive analysis tools, we can achieve more precise and safer labeling of the eye irritation potential of products.
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Affiliation(s)
- H Weissinger
- Translational Center Regenerative Therapies (TLC-RT), Fraunhofer Institute for Silicate Research (ISC), Würzburg, Germany
- Tissue Engineering and Regenerative Medicine (TERM), University Hospital Würzburg, Würzburg, Germany
| | - N Knetzger
- Translational Center Regenerative Therapies (TLC-RT), Fraunhofer Institute for Silicate Research (ISC), Würzburg, Germany
| | - C Cleve
- Translational Center Regenerative Therapies (TLC-RT), Fraunhofer Institute for Silicate Research (ISC), Würzburg, Germany
| | - C Lotz
- Translational Center Regenerative Therapies (TLC-RT), Fraunhofer Institute for Silicate Research (ISC), Würzburg, Germany.
- Tissue Engineering and Regenerative Medicine (TERM), University Hospital Würzburg, Würzburg, Germany.
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Kim HB, Yoo JI, Kang SC, Song JK. Green Solvent Selection for All Solution-Processed Inverted Quantum Dot Light Emitting Diode. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2304051. [PMID: 37612793 DOI: 10.1002/smll.202304051] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Revised: 07/17/2023] [Indexed: 08/25/2023]
Abstract
Quantum-dot light-emitting diodes (QD-LEDs) have gained attention as potential display technologies. However, the solvents used to dissolve a polymeric hole transport layer (HTL) are hazardous to both humans and the environment. Additionally, intermixing the HTL and QD layers presents a significant challenge when fabricating inverted QD-LEDs. Here, a green solvent selection procedure to achieve good device performance and environmental safety in QD-LEDs is established. This procedure utilizes Hansen solubility parameters and surface roughness to identify a set of solvents that do not lower the device performance by avoiding interlayer mixing or a rough interface. The CHEM21 solvent selection guide is used to screen for environmentally hazardous solvents. Finally, cyclopentanone (CPO) is selected as the optimal HTL solvent from among 16 candidates. Using CPO improves the maximum luminescence by ≈1.6 times and the maximum current efficiency by ≈12.6 times, compared to that of conventional devices using hazardous chlorobenzene. Solvent selection is critical for the fabrication of green and high-performance inverted QD-LEDs, particularly for large display panels that require n-type oxide thin-film transistors.
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Affiliation(s)
- Hyo-Bin Kim
- Department of Display Convergence Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Jae-In Yoo
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Sung-Cheon Kang
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea
| | - Jang-Kun Song
- Department of Display Convergence Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea
- Department of Electrical and Computer Engineering, Sungkyunkwan University, Suwon, 16419, Republic of Korea
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Masrura SU, Abbas T, Jones-Lepp TL, Kaewlom P, Khan E. Combining environmental, health, and safety features with a conductor like Screening Model for selecting green solvents for antibiotic analyses. ENVIRONMENTAL RESEARCH 2023; 218:114962. [PMID: 36460072 DOI: 10.1016/j.envres.2022.114962] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 11/14/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
Extraction and chromatographic techniques for analyzing pharmaceutically active compounds necessitate large quantities of organic solvents, resulting in a high volume of hazardous waste. The concept of green solvents focuses on protecting the environment by reducing or even eliminating the use of toxic solvents. The main objective of this critical review article is to build a framework for choosing green solvents for antibiotic analyses. The article briefly discusses the chemical properties of ciprofloxacin, sulfamethoxazole, tetracycline, and trimethoprim, and the current state of methodologies for their analyses in water and wastewater. It evaluates the greenness of solvents used for antibiotic analyses and includes insights on the comparison between conventional and green solvents for the analyses. An economic and environmental health and safety analysis combined with a Conductor-like Screening Model for Real Solvent (COSMO-RS) molecular simulation technique for predicting extraction efficiency was used in the evaluation. Methyl acetate and propylene carbonate tied for the greenest solvents from an environmental and economic perspective, whereas the COSMO-RS approach suggests dimethyl sulfoxide (DMSO) as the most suitable candidate. Although DMSO ranked third environmentally and economically, after methyl acetate and propylene carbonate, it would be an ideal replacement of hazardous solvents if it could be manufactured at a lower cost. DMSO showed the highest extraction capacity, as it can interact with antibiotics through hydrophobic interaction and hydrogen bonding. This article can be used as a green solvent selection guide for developing sustainable processes for antibiotic analyses.
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Affiliation(s)
- Sayeda Ummeh Masrura
- Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, Las Vegas, NV, 89154, USA.
| | - Tauqeer Abbas
- Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, Las Vegas, NV, 89154, USA; Department of Chemistry and Chemical Engineering, Lahore University of Management Sciences, Lahore, Pakistan.
| | - Tammy L Jones-Lepp
- Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, Las Vegas, NV, 89154, USA.
| | - Puangrat Kaewlom
- Department of Environmental Engineering, Faculty of Engineering, Chiang Mai University, Chiang Mai, 50200, Thailand.
| | - Eakalak Khan
- Department of Civil and Environmental Engineering and Construction, University of Nevada, Las Vegas, Las Vegas, NV, 89154, USA.
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6
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Catalyst-free crosslinked sustainable functional silicones by supramolecular interactions. REACT FUNCT POLYM 2022. [DOI: 10.1016/j.reactfunctpolym.2022.105419] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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7
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Inoue D, Hisada K, Ike M. Effectiveness of tetrahydrofuran at enhancing the 1,4-dioxane degradation ability of activated sludge lacking prior exposure to 1,4-dioxane. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2022; 86:1707-1718. [PMID: 36240306 DOI: 10.2166/wst.2022.296] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
1,4-dioxane (DX) is a contaminant of emerging concern in water environments. The enrichment of DX-degrading bacteria indigenous to activated sludge is key for the efficient biological removal of DX in wastewater. To identify an effective substrate, which enables the selective enrichment of DX-degrading bacteria and has lower toxicity and persistence than DX, this study explored the effectiveness of tetrahydrofuran (THF) at enhancing the DX degradation ability of activated sludge without historical exposure to DX. Although the activated sludge initially exhibited negligible ability to degrade DX (100 mg-C/L) as the sole carbon source, the repeated batch cultivation on THF could enrich bacterial populations capable of degrading DX, inducing the DX degradation ability in activated sludge as effectively as DX did. The THF-enrichment culture after 4 weeks degraded 100 mg-C/L DX almost completely within 21 d. Sequencing analyses revealed that soluble di-iron monooxygenase group 5C, including THF/DX monooxygenase, would play a dominant role in the initial oxidation of DX in THF-enrichment culture, which completely differed from the enrichment culture cultivated on DX. The results indicate that THF can be applied as an effective substrate to enhance the DX degradation ability of microbial consortia, irrespective of the intrinsic ability.
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Affiliation(s)
- Daisuke Inoue
- Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan E-mail:
| | - Kazuki Hisada
- Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan E-mail:
| | - Michihiko Ike
- Division of Sustainable Energy and Environmental Engineering, Osaka University, 2-1 Yamadaoka, Suita, Osaka 565-0871, Japan E-mail:
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Zhang C, Wang Y, Yang W, Zheng J. Biobased 2,5-Dimethyltetrahydrofuran as a Green Aprotic Ether Solvent. Org Process Res Dev 2022. [DOI: 10.1021/acs.oprd.2c00136] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Chen Zhang
- School of Resources and Environment, Nanchang University, 999 XuFu Road, Nanchang 330031, China
| | - Yufen Wang
- School of Resources and Environment, Nanchang University, 999 XuFu Road, Nanchang 330031, China
| | - Weiran Yang
- School of Chemistry and Chemical Engineering, Nanchang University, 999 XuFu Road, Nanchang 330031, China
| | - Jing Zheng
- School of Chemistry and Chemical Engineering, Nanchang University, 999 XuFu Road, Nanchang 330031, China
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Xie R, Zhou L, Smith AE, Almquist CB, Berberich JA, Danielson ND. A dual grafted fluorinated hydrocarbon amine weak anion exchange resin polymer for adsorption of perfluorooctanoic acid from water. JOURNAL OF HAZARDOUS MATERIALS 2022; 431:128521. [PMID: 35231815 DOI: 10.1016/j.jhazmat.2022.128521] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 02/12/2022] [Accepted: 02/17/2022] [Indexed: 06/14/2023]
Abstract
Perfluorooctanoic acid (PFOA) is a persistent and recalcitrant organic contaminant of exceptional environmental concern, and its removal from water has increasingly attracted global attention due to its wide distribution and strong bioaccumulation. Adsorption is considered an effective technique for PFOA removal and more efficient PFOA sorbents are still of interest. This study developed a dual grafted fluorinated hydrocarbon amine weak anion exchange (WAX) polymeric resin (Sepra-WAX-KelF-PEI) for PFOA removal from water. This polymer was synthesized by a two-step amine grafting reaction procedure involving first the reaction of the Sepra-WAX hydrocarbon polymer with poly(vinylidinefluoride-chlorotrifluoroethylene) (Kel-F 800) and then a second reaction with polyethyleneimine (PEI). Characterization of the synthesized polymers was performed using scanning electron microscopy and elemental analysis (F and Cl) by energy dispersive X-ray spectroscopy. The PFOA adsorption performance evaluations were conducted by packed column flow analyses with on-line detection. The results show the breakthrough of the Sepra-WAX-KelF-PEI synthesized with optimum stoichiometry was two times better than the starting anion exchange polymer Sepra-WAX, and six times better than powdered activated carbon, when using the same column size. The adsorption mechanisms of this novel adsorbent including hydrophobic interaction and electrostatic interaction were also clarified in this study. The adsorption kinetic parameters of the two optimum synthesized sorbents were determined using the Thomas model, the Yoon-Nelson model, and batch isotherm studies, and compared with those found with activated carbon and the starting WAX resin. Good agreement of the batch isotherm and column studies with respect to adsorption capacities trends between all three polymers (Sepra-WAX, Sepra-WAX-KelF, and Sepra-WAX-KelF-PEI) were noted.
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Affiliation(s)
- Ruichao Xie
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH 45056, USA
| | - Ling Zhou
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH 45056, USA
| | - Abigail E Smith
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH 45056, USA
| | | | - Jason A Berberich
- Department of Chemical Engineering, Miami University, Oxford, OH 45056, USA
| | - Neil D Danielson
- Department of Chemistry and Biochemistry, Miami University, Oxford, OH 45056, USA.
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10
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Lanthanum oxycarbonate with nanosheet-like network structure for cataluminescence sensing of tetrahydrofuran. Microchem J 2022. [DOI: 10.1016/j.microc.2022.107710] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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11
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Lambré C, Barat Baviera JM, Bolognesi C, Chesson A, Cocconcelli PS, Crebelli R, Gott DM, Grob K, Lampi E, Mengelers M, Mortensen A, Steffensen I, Tlustos C, Van Loveren H, Vernis L, Zorn H, Bignami M, Fürst P, Tard A, Van Haver E. Safety assessment of 2‐methyloxolane as a food extraction solvent. EFSA J 2022; 20:e07138. [PMID: 35317123 PMCID: PMC8923129 DOI: 10.2903/j.efsa.2022.7138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The EFSA Panel on Food Contact Materials, Enzymes and Processing Aids (CEP) assessed the safety of 2‐methyloxolane as an extraction solvent under the intended conditions of use and the maximum residue limits (MRLs) proposed by the applicant. 2‐Methyloxolane is intended to be used in processes currently applying hexane for oil and protein extraction from plant sources or for extraction of food additives. The proposed MRLs for the following uses are: (i) 1 mg/kg in fat, oil or butter; (ii) 10 mg/kg in defatted protein products, defatted flour and other defatted solid ingredients; (iii) 1 mg/kg in food category 13 (foods intended for particular nutritional uses as defined by Directive 2009/39/EC); and (iv) 1 mg/kg for the extraction of food additives. The Panel calculated the dietary exposure with the highest potential maximum (95th percentile) for toddlers as 0.32 mg/kg body weight (bw) per day. Based on the available toxicological data, the Panel concluded that 2‐methyloxolane was rapidly metabolised with a low bioaccumulation potential and does not raise a concern for genotoxicity. The Panel identified different no observed adverse effect levels (NOAELs) in a subchronic oral toxicity study in rats, an oral developmental toxicity study and an extended one‐generation reproductive toxicity study, and a TDI of 1 mg/kg bw per day for 2‐methyloxolane was derived based on the lowest identified NOAEL (100 mg/kg bw per day) for reproductive and developmental toxicity. This TDI was not exceeded in any of the population groups at the mean and 95th percentile exposure. The Panel concluded that the extraction solvent 2‐methyloxolane does not raise a safety concern when used according to the intended conditions and at the proposed MRLs in the extracted foods or food ingredients.
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Moon J, Kang C, Kang H. Vertical Alignment of Liquid Crystals on Phenylphenoxymethyl-Substituted Polystyrene—PS Derivatives Structurally Similar to LC Molecules. Polymers (Basel) 2022; 14:polym14050934. [PMID: 35267756 PMCID: PMC8912853 DOI: 10.3390/polym14050934] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2022] [Revised: 02/24/2022] [Accepted: 02/24/2022] [Indexed: 11/16/2022] Open
Abstract
A series of polystyrene derivatives containing precursors of liquid crystal (LC) molecules, phenylphenoxymethyl-substituted polystyrene (PPHE#; # = 5, 15, 25, 50, 75, and 100)—where # is the molar content of 4-phenylphenol using polymer modification reactions—were prepared in order to examine the effect of the polymer film, which possess similar LC molecular structure on the LC alignment properties. It was found that the Tg values of the PPHE# were higher than 100 °C due to their aromatic structure in the biphenyl-based PHE moiety. The LC cells fabricated with PPHE5 and PPHE15 films exhibited planar LC alignment. Conversely, LC molecules showed a vertical alignment in LC cells made using the polymer films with phenylphenoxymethyl side groups in the range of 25–100 mol %. The polar surface energies on the PPHE# films can be associated with the vertical LC alignment on the PPHE# films. For example, vertical LC alignment was exhibited when the polar surface energy of the polymer films was less than approximately 4.2 mJ/m2. Aligning stability was observed at 200 °C and UV irradiation of 20 J/cm2 for LC cells made using the PPHE100 film. Therefore, it was found that biphenyl, one of the LC precursors, modified polystyrene derivatives and can produce a next-generation vertical LC alignment system.
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Affiliation(s)
| | | | - Hyo Kang
- Correspondence: ; Tel.: +82-51-200-7720; Fax: +82-51-200-7728
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Khadijeh Pourkhanali, Gholam Khayati. Phase Diagram, Equilibrium Data, and Correlation for Aqueous Two-Phase System Formed by Tetrahydrofuran and Sorbitol. THEORETICAL FOUNDATIONS OF CHEMICAL ENGINEERING 2021. [DOI: 10.1134/s0040579521060099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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14
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Zhu J, Chen L, Cai C. Acid Hydrotropic Fractionation of Lignocelluloses for Sustainable Biorefinery: Advantages, Opportunities, and Research Needs. CHEMSUSCHEM 2021; 14:3031-3046. [PMID: 34033701 DOI: 10.1002/cssc.202100915] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 05/24/2021] [Indexed: 06/12/2023]
Abstract
This Minireview provides a comprehensive discussion on the potential of using acid hydrotropes for sustainably fractionating lignocelluloses for biorefinery applications. Acid hydrotropes are a class of acids that have hydrotrope properties toward lignin, which helps to solubilize lignin in aqueous systems. With the capability of cleaving ether and ester bonds and even lignin-carbohydrate complex (LCC) linkages, these acid hydrotropes can therefore isolate lignin embedded in the plant biomass cell wall and subsequently solubilize the isolated lignin in aqueous systems. Performances of two acid hydrotropes, that is, an aromatic sulfonic acid [p-toluenesulfonic acid (p-TsOH)] and a dicarboxylic acid [maleic acid (MA)], in terms of delignification and dissolution of hemicelluloses, and reducing lignin condensation, were evaluated and compared. The advantages of lignin esterification by MA for producing cellulosic sugars through enzymatic hydrolysis and lignin-containing cellulose nanofibrils (LCNFs) through mechanical fibrillation from the fractionated water insoluble solids (WIS), and for obtaining less condensed lignin with light color, were demonstrated. The excellent enzymatic digestibility of maleic acid hydrotropic fractionation WISs was also demonstrated by comparing with WISs from other fractionation processes. The recyclability and reusability of acid hydrotropes were also reviewed. Finally, perspectives on future research needs to address key technical issues for commercialization were also provided.
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Affiliation(s)
- Junyong Zhu
- USDA Forest Service, Forest Products Laboratory, Madison, WI, USA
| | - Liheng Chen
- Department of Biomedical Engineering, Jinan University, Guangzhou, P. R. China
| | - Cheng Cai
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, P. R. China
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15
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Seo K, Kang H. Vertical Orientation of Liquid Crystal on Polystyrene Substituted with n-alkylbenzoate- p-oxymethyl Pendant Group as a Liquid Crystal Precursor. Polymers (Basel) 2021; 13:2058. [PMID: 34201714 PMCID: PMC8271889 DOI: 10.3390/polym13132058] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 06/18/2021] [Accepted: 06/20/2021] [Indexed: 11/16/2022] Open
Abstract
We synthesized a series of polystyrene derivatives modified with precursors of liquid crystal (LC) molecules via polymer modification reactions. Thereafter, the orientation of the LC molecules on the polymer films, which possess part of the corresponding LC molecular structure, was investigated systematically. The precursors and the corresponding derivatives used in this study include ethyl-p-hydroxybenzoate (homopolymer P2BO and copolymer P2BO#, where # indicates the molar fraction of ethylbenzoate-p-oxymethyl in the side chain (# = 20, 40, 60, and 80)), n-butyl-p-hydroxybenzoate (P4BO), n-hexyl-p-hydroxybenzoate (P6BO), and n-octyl-p-hydroxybenzoate (P8BO). A stable and uniform vertical orientation of LC molecules was observed in LC cells fabricated with P2BO#, with 40 mol% or more ethylbenzoate-p-oxymethyl side groups. In addition, the LC molecules were oriented vertically in LC cells fabricated with homopolymers of P2BO, P4BO, P6BO, and P8BO. The water contact angle on the polymer films can be associated with the vertical orientation of the LC molecules in the LC cells fabricated with the polymer films. For example, vertical LC orientation was observed when the water contact angle of the polymer films was greater than ~86°. Good orientation stability was observed at 150 °C and with 20 J/cm2 of UV irradiation for LC cells fabricated with the P2BO film.
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Affiliation(s)
| | - Hyo Kang
- BK-21 Four Graduate Program, Department of Chemical Engineering, Dong-A University, 37 Nakdong-Daero 550 Beon-gil, Saha-gu, Busan 49315, Korea;
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Seo K, Kang H. Vertical Orientation of Liquid Crystal on Comb-Like 4-( trans-4-alkylcyclohexyl)phenoxymethyl-substituted Polystyrene Containing Liquid Crystal Precursor. Polymers (Basel) 2021; 13:1404. [PMID: 33926053 PMCID: PMC8123660 DOI: 10.3390/polym13091404] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2021] [Revised: 04/21/2021] [Accepted: 04/22/2021] [Indexed: 11/18/2022] Open
Abstract
We synthesized a series of polystyrene derivatives modified with precursors of liquid crystal (LC) molecules, including 4-(trans-4-ethylcyclohexyl)phenol (homopolymer PECH and copolymer PECH#; # = 5, 10, 15, 20, 40, 60, and 80, where # indicates the molar fraction of 4-(trans-4-ethylcyclohexyl)phenoxymethyl in the side chain), 4-(trans-4-propylcyclohexyl)phenol (PPCH), 4-(trans-4-butylcyclohexyl)phenol (PBCH), and 4-(trans-4-amylcyclohexyl)phenol (PAmCH) via polymer modification reactions in order to investigate the orientation of LC molecules on polymer films exhibiting part of the LC molecular structure. A stable and uniform vertical orientation of LC molecules was observed in LC cells fabricated with PECH#, having 15 mol% or more of 4-(trans-4-ethylcyclohexyl)phenoxymethyl side groups. In addition, the vertical orientation of LC molecules was observed in LC cells fabricated with homopolymers of PECH, PPCH, PBCH, and PAmCH. The water contact angle on the polymer films could be associated with the vertical orientation of the LC molecules in the LC cells fabricated with polymer films. For example, a vertical LC orientation was observed when the water contact angle of the polymer films was higher than ~81°. Good orientation stability was observed at 200 °C and 15 mW/cm2 of UV irradiation for LC cells fabricated with PECH films.
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Affiliation(s)
| | - Hyo Kang
- BK-21 Four Graduate Program, Department of Chemical Engineering, Dong-A University, 37 Nakdong-Daero 550 Beon-gil, Saha-gu, Busan 604-714, Korea;
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Extraction strategies of PAHs from grilled meat for their determination by HPLC–DAD. CHEMICAL PAPERS 2021. [DOI: 10.1007/s11696-021-01623-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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18
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Vertical Orientation of Liquid Crystal on 4- n-Alkyloxyphenoxymethyl-Substituted Polystyrene Containing Liquid Crystal Precursor. Polymers (Basel) 2021; 13:polym13050736. [PMID: 33673579 PMCID: PMC7956854 DOI: 10.3390/polym13050736] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 02/21/2021] [Accepted: 02/23/2021] [Indexed: 01/19/2023] Open
Abstract
We synthesized a series of polystyrene derivatives that were modified with precursors of liquid crystal (LC) molecules, such as 4-ethyloxyphenol (homopolymer PEOP and copolymer PEOP#; # = 20, 40, 60, and 80, where # indicates the molar fraction of 4-ethyloxyphenoxymethyl in the side chain), 4-n-butyloxyphenol (PBOP), 4-n-hexyloxyphenol (PHOP), and 4-n-octyloxyphenol (POOP), via polymer modification reaction to investigate the orientation of LC molecules on polymer films, exhibiting part of the LC molecular structure. LC molecules showed a stable and uniform vertical orientation in LC cells fabricated with polymers that have 4-ethyloxyphenoxymethyl in the range of 40–100 mol%. In addition, similar results were obtained in LC cells fabricated with homopolymers of PEOP, PBOP, PHOP, and POOP. The vertical orientation of LC molecules in LC cells fabricated with polymer films correlated to the surface energy of polymer films. For example, vertical LC orientation was observed when the total surface energies of the polymer films were lower than approximately 43.2 mJ/m2. Good alignment stabilities were observed at 150 °C and 20 J/cm2 of ultraviolet irradiation for LC cells fabricated with PEOP film.
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Chen J, Ruan JW, Ye JX, Cheng ZW, Chen DZ. Removal of gaseous tetrahydrofuran via a three-phase airlift bioreactor loaded with immobilized cells of GFP-tagged Pseudomonas oleovorans GDT4. CHEMOSPHERE 2020; 258:127148. [PMID: 32535434 DOI: 10.1016/j.chemosphere.2020.127148] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 05/01/2020] [Accepted: 05/18/2020] [Indexed: 06/11/2023]
Abstract
Tetrahydrofuran (THF) is a common highly toxic cyclic aliphatic ether that frequently exists in waste gases. Removal of gaseous THF is a serious issue with important environmental ramifications. A novel three-phase airlift bioreactor (TPAB) loaded with immobilized cells was developed for efficient THF removal from gas streams. An effective THF-degrading transformant, Pseudomonas oleovorans GDT4, which contains the pTn-Mod-OTc-gfp plasmid and was tagged with a green fluorescent protein (GFP), was constructed. Continuous treatment of THF-containing waste gases was succeeded by the GFP-labelled cells immobilized with calcium alginate and activated carbon fiber in the TPAB for 60 days with >90% removal efficiency. The number of fluorescent cells in the beads reached 1.7 × 1011 cells·g-1 of bead on day 10, accounting for 83.3% of the total number of cells. The amount further increased to 3.0 × 1011 cells·g-1 of bead on day 40. However, it decreased to 2.5 × 1011 cells·g-1 of bead with a substantial increase in biomass in the liquid because of cell leakage and hydraulic shock. PCR-DGGE revealed that P. oleovorans was the dominant microorganism throughout the entire operation. The maximum elimination capacity was affected by empty bed residence time (EBRT). The capacity was only 25.9 g m-3·h-1 at EBRT of 80 s, whereas it reached 37.8 g m-3·h-1 at EBRT of 140 s. This work provides an alternative method for full-scale removal of gaseous THF and presents a useful tool for determining the biomass of a specific degrader in immobilized beads.
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Affiliation(s)
- Jing Chen
- College of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, 316004, China
| | - Jing-Wen Ruan
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Jie-Xu Ye
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Zhuo-Wei Cheng
- College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China
| | - Dong-Zhi Chen
- College of Petrochemical and Environment, Zhejiang Ocean University, Zhoushan, 316004, China; College of Environment, Zhejiang University of Technology, Hangzhou, 310032, China.
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Abstract
Currently, apart from the widely known lithium-ion batteries, there are competitive solutions in the form of, for example, Li-S batteries. While the results of studies on the toxicity of Li-ion battery components are published, such studies on the components of Li-S cells are just beginning. The purpose of the current review was to identify materials used in the production of Li-S batteries and their toxicity, especially for humans. The review showed many kinds of materials with different levels of toxicity utilized for manufacturing of these cells. Some materials are of low toxicity, while some others are of the high one. A lot of materials have assigned different hazard statements. For some of the materials, no hazard statements were assigned, although such materials are toxic. No data related to the toxicity of some materials were found in the literature. This points out the need to further studies on their toxicity and legal actions to assign appropriate hazard statements.
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Li J, Zhang W, Xu S, Hu C. The Roles of H 2O/Tetrahydrofuran System in Lignocellulose Valorization. Front Chem 2020; 8:70. [PMID: 32117893 PMCID: PMC7020750 DOI: 10.3389/fchem.2020.00070] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Accepted: 01/22/2020] [Indexed: 12/18/2022] Open
Abstract
Lignocellulosic biomass as a potential alternative to fossil resource for the production of valuable chemicals and fuels has attracted substantial attention, while reducing the recalcitrance of lignocellulosic biomass is still challenging due to the complex and cross-linking structure of biomass. Solvent system plays important roles in the pretreatment of lignocellulose, enabling the transformation of solid biomass to liquid fluid with better mass and heat transfer, as well as in the selective formation of target products. In particular, H2O/tetrahydrofuran (H2O/THF) system has recently been widely applied in lignocellulose valorization, which has been proved to exhibit outstanding efficiency for the conversion of lignocellulose, solubilization of the intermediates and products, and shifting reaction equilibrium, thereby significantly improving the yield and selectivity of target products, as well as the full utilization of lignocellulose. In addition, THF shows low toxicity, and is known as a renewable solvent which can be produced from bio-derived chemicals. Herein, this review concentrates on the advances of H2O/THF system in lignocellulose valorization in recent years. Several aspects relative to the roles of H2O/THF system are discussed as follows: the pretreatment of lignin, conversion of hemicellulose and cellulose components in lignocelluloses, and the promoting formation of valuable chemicals like furfural, 5-hydroxymethyl furfural (HMF), levulinic acid, and so on, as well as the inhibiting role in humins formation. This review might provide useful information for the design of effective solvent system in full utilization of lignocellulosic biomass.
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Affiliation(s)
| | | | | | - Changwei Hu
- Key Laboratory of Green Chemistry and Technology, Ministry of Education, College of Chemistry, Sichuan University, Chengdu, China
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Dekant W. Tetrahydrofuran-induced tumors in rodents are not relevant to humans: Quantitative weight of evidence analysis of mode of action information does not support classification of tetrahydrofuran as a possible human carcinogen. Regul Toxicol Pharmacol 2019; 109:104499. [DOI: 10.1016/j.yrtph.2019.104499] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 10/11/2019] [Accepted: 10/12/2019] [Indexed: 02/05/2023]
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Effects of an Acetic Acid and Acetone Mixture on the Characteristics and Scaffold–Cell Interaction of Electrospun Polycaprolactone Membranes. APPLIED SCIENCES-BASEL 2019. [DOI: 10.3390/app9204350] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Green electrospinning has attracted great interest since non-toxic solvents were shown to be applicable in the fabrication of fibrous materials while ensuring health safety and environmental protection. Less harmful reagents such as acetone (AC) and acetic acid (AA) have been employed in this field in recent years. However, research in this area is still rare, yielding only preliminary results. In this study, two different types of solvents (pure AC and an AA/AC mixture) were used to fabricate electrospun polycaprolactone (PCL) membranes. Sample morphology, wettability, tensile strength, and chemical composition were compared between two types of membranes. Cell–scaffold interaction was also examined by cell adhesion and proliferation assays. The results demonstrate that the two types of solvents had significant effects on membrane morphology, physical strength, and cell adherence behaviors, which should be considered for different application purposes.
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Qi M, Huang H, Zhang Y, Wang H, Li H, Lu Z. Novel tetrahydrofuran (THF) degradation-associated genes and cooperation patterns of a THF-degrading microbial community as revealed by metagenomic. CHEMOSPHERE 2019; 231:173-183. [PMID: 31129398 DOI: 10.1016/j.chemosphere.2019.05.137] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 04/29/2019] [Accepted: 05/17/2019] [Indexed: 06/09/2023]
Abstract
Our understanding of the tetrahydrofuran (THF) degradation in complex environment is limited. The majority of THF degrading genes reported are group V soluble diiron monooxygenases and share greater than 95% homology with one another. In this study, we used sole-carbon-source incubation combined with high-throughput metagenomic sequencing to investigate this contaminant's degradation in environmental samples. We identified as-yet-uncultivated microbe from the genera Pseudonocardia and fungi Scedosporium sp. (Scedosporium sp. was successfully isolated) as THF degraders as containing THF degradation genes, while microbes from the genera Bordetella, Pandoraea and Rhodanobacter functioned as main cooperators by utilizing acidic intermediates and providing anti-acid mechanisms. Furthermore, a 9387-bp THF degradation cluster designated thmX from the as-yet-uncultivated Pseudonocardia (with 6 main ORFs and with 79-93% amino acid sequence identity with previously reported clusters) was discovered. We also found a THF-degrading related cytochrome P450 monooxygenase from the genus Scedosporium and predicted its cognate reductase for the first time. All the genes and clusters mentioned above were successfully amplified from samples and cloned into the suitable expression vectors. This study will provide novel insights for understanding of THF degradation mechanisms under acid stress conditions and mining new THF degradation genes.
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Affiliation(s)
- Minbo Qi
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Hui Huang
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Ying Zhang
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Haixia Wang
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Hanbo Li
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, Hangzhou, 310058, PR China
| | - Zhenmei Lu
- MOE Laboratory of Biosystem Homeostasis and Protection, College of Life Sciences, Zhejiang University, Hangzhou, 310058, PR China. http://
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Khezerloo E, Mousavi-khoshdel S, Safarifard V. Sensitive and selective detection of metal ions and small molecules in aqueous media using a hydrolytically stable amide-functionalized metal–organic framework. Polyhedron 2019. [DOI: 10.1016/j.poly.2019.03.049] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Microbial Community Analysis Provides Insights into the Effects of Tetrahydrofuran on 1,4-Dioxane Biodegradation. Appl Environ Microbiol 2019; 85:AEM.00244-19. [PMID: 30926731 DOI: 10.1128/aem.00244-19] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 03/20/2019] [Indexed: 11/20/2022] Open
Abstract
Tetrahydrofuran (THF) is known to induce the biodegradation of 1,4-dioxane (dioxane), an emerging contaminant, but the mechanisms by which THF affects dioxane biodegradation in microbial communities are not well understood. To fill this knowledge gap, changes in the microbial community structure in microcosm experiments with synthetic medium and landfill leachate were examined over time using 16S rRNA gene amplicon sequencing and functional gene quantitative PCR assays. The overarching hypothesis being tested was that THF promoted dioxane biodegradation by increasing the abundance of dioxane-degrading bacteria in the consortium. The data revealed that in experiments with synthetic medium, the addition of THF significantly increased the abundance of Pseudonocardia, a genus with several representatives that can grow on both dioxane and THF, and of Rhodococ cus ruber, a species that can use THF as the primary growth substrate while cometabolizing dioxane. However, in similar experiments with landfill leachate, only R. ruber was significantly enriched. When the THF concentration was higher than the dioxane concentration, THF competitively inhibited dioxane degradation since dioxane degradation was negligible, while the dioxane-degrading bacteria and the corresponding THF/dioxane monooxygenase gene copies increased by a few orders of magnitude.IMPORTANCE Widespread in groundwater and carcinogenic to humans, 1,4-dioxane (dioxane) is attracting significant attention in recent years. Advanced oxidation processes can effectively remove dioxane but require high energy consumption and operation costs. Biological removal of dioxane is of particular interest due to the ability of some bacteria to mineralize dioxane at a low energy cost. Although dioxane is generally considered recalcitrant to biodegradation, more than 20 types of bacteria can degrade dioxane as the sole electron donor substrate or the secondary electron donor substrate. In the latter case, tetrahydrofuran (THF) is commonly studied as the primary electron donor substrate. Previous work has shown that THF promotes dioxane degradation at a low THF concentration but inhibits dioxane degradation at a high THF concentration. Our work expanded on the previous work by mechanically examining the effects of THF on dioxane degradation in a microbial community context.
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Lee EC, Kim HJ, Park SY. Reversible Shape-Morphing and Fluorescence-Switching in Supramolecular Nanomaterials Consisting of Amphiphilic Cyanostilbene and Cucurbit[7]uril. Chem Asian J 2019; 14:1457-1461. [PMID: 30883032 DOI: 10.1002/asia.201900204] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Indexed: 02/06/2023]
Abstract
We demonstrate a reversible shape-morphing with concurrent fluorescence switching in the nanomaterials which are complexed with cucurbit[7]uril (CB[7]) in water. The cyanostilbene derivative alone forms ribbon-like two-dimensional (2D) nanocrystals with bright yellow excimeric emission in water (λem =540 nm, ΦF =42 %). Upon CB[7] addition, however, the ribbon-like 2D nanocrystals immediately transform to spherical nanoparticles with significant fluorescence quenching and blue-shifting (λem =490 nm, ΦF =1 %) through the supramolecular complexation of the cyanostilbene and CB[7]. Based on this reversible fluorescence switching and shape morphing, we could demonstrate a novel strategy of turn-on fluorescence sensing of spermine and also monitoring of lysine decarboxylase activity.
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Affiliation(s)
- Eung-Chang Lee
- Laboratory for Supramolecular Optoelectronic Materials, Department of Materials Science and Engineering, Seoul National University, ENG 445, Seoul, 08826, Korea
| | - Hyeong-Ju Kim
- Laboratory for Supramolecular Optoelectronic Materials, Department of Materials Science and Engineering, Seoul National University, ENG 445, Seoul, 08826, Korea
| | - Soo Young Park
- Laboratory for Supramolecular Optoelectronic Materials, Department of Materials Science and Engineering, Seoul National University, ENG 445, Seoul, 08826, Korea
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Novel Composite Membranes Based on Chitosan Copolymers with Polyacrylonitrile and Polystyrene: Physicochemical Properties and Application for Pervaporation Dehydration of Tetrahydrofuran. MEMBRANES 2019; 9:membranes9030038. [PMID: 30866529 PMCID: PMC6468362 DOI: 10.3390/membranes9030038] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 02/27/2019] [Accepted: 03/02/2019] [Indexed: 11/16/2022]
Abstract
Pervaporation has been applied for tetrahydrofuran (THF) dehydration with novel composite membranes advanced by a thin selective layer composed of chitosan (CS) modified by copolymerization with vinyl monomers, acrylonitrile (AN) and styrene, in order to improve the chemical and mechanical stability of CS-based membranes. Composite membranes were developed by depositing a thin selective layer composed of CS copolymers onto a commercially-available porous support based on aromatic polysulfonamide (UPM-20®). The topography and morphology of the obtained materials were studied by atomic force microscopy (AFM), scanning electron microscopy (SEM) and X-ray diffraction analysis (XRD). Thermal properties and stability were determined by coupled evolved gas analysis (EGA-MS). Transport properties were estimated in pervaporation dehydration of THF. The effect of operating parameters for the pervaporation dehydration of THF such as feed compositions and temperatures (295, 308 and 323 K) was evaluated. It was shown that CS modification with different vinyl monomers led to a difference in physical and transport properties. The composite membrane with the thin selective layer based on CS-PAN copolymer demonstrated optimal transport properties and exhibited the highest water content in the permeate with a reasonably high permeation flux.
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Sampedro A, Ramos‐Torres Á, Schwöppe C, Mück‐Lichtenfeld C, Helmers I, Bort A, Díaz‐Laviada I, Fernández G. Hierarchical Self‐Assembly of BODIPY Dyes as a Tool to Improve the Antitumor Activity of Capsaicin in Prostate Cancer. Angew Chem Int Ed Engl 2018; 57:17235-17239. [DOI: 10.1002/anie.201804783] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2018] [Indexed: 12/21/2022]
Affiliation(s)
- Angel Sampedro
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Correnstrasse 40 48149 Münster Germany
| | - Ágata Ramos‐Torres
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Correnstrasse 40 48149 Münster Germany
- Department of System Biology Biochemistry and Molecular Biology Unit School of Medicine and Chemical Research Institute “Andrés M. del Río” Alcalá University Alcalá de Henares 28871 Madrid Spain
| | - Christian Schwöppe
- Universitätsklinikum Münster Medizinische Klinik A Albert-Schweitzer-Campus 1/A15 48149 Münster Germany
| | - Christian Mück‐Lichtenfeld
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Correnstrasse 40 48149 Münster Germany
| | - Ingo Helmers
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Correnstrasse 40 48149 Münster Germany
| | - Alicia Bort
- Department of System Biology Biochemistry and Molecular Biology Unit School of Medicine and Chemical Research Institute “Andrés M. del Río” Alcalá University Alcalá de Henares 28871 Madrid Spain
| | - Inés Díaz‐Laviada
- Department of System Biology Biochemistry and Molecular Biology Unit School of Medicine and Chemical Research Institute “Andrés M. del Río” Alcalá University Alcalá de Henares 28871 Madrid Spain
| | - Gustavo Fernández
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Correnstrasse 40 48149 Münster Germany
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30
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Sampedro A, Ramos‐Torres Á, Schwöppe C, Mück‐Lichtenfeld C, Helmers I, Bort A, Díaz‐Laviada I, Fernández G. Selbstanordnung von BODIPY‐Farbstoffen als Werkzeug, um die Antitumoraktivität von Capsaicin bei Prostatakrebs zu erhöhen. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201804783] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Angel Sampedro
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Correnstraße 40 48149 Münster Deutschland
| | - Ágata Ramos‐Torres
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Correnstraße 40 48149 Münster Deutschland
- Department of System Biology, Biochemistry and Molecular Biology Unit School of Medicine and Chemical Research Institute “Andrés M. del Río” Alcalá University Alcalá de Henares 28871 Madrid Spanien
| | - Christian Schwöppe
- Universitätsklinikum Münster Medizinische Klinik A Albert-Schweitzer-Campus 1/A15 48149 Münster Deutschland
| | - Christian Mück‐Lichtenfeld
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Correnstraße 40 48149 Münster Deutschland
| | - Ingo Helmers
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Correnstraße 40 48149 Münster Deutschland
| | - Alicia Bort
- Department of System Biology, Biochemistry and Molecular Biology Unit School of Medicine and Chemical Research Institute “Andrés M. del Río” Alcalá University Alcalá de Henares 28871 Madrid Spanien
| | - Inés Díaz‐Laviada
- Department of System Biology, Biochemistry and Molecular Biology Unit School of Medicine and Chemical Research Institute “Andrés M. del Río” Alcalá University Alcalá de Henares 28871 Madrid Spanien
| | - Gustavo Fernández
- Organisch-Chemisches Institut Westfälische Wilhelms-Universität Münster Correnstraße 40 48149 Münster Deutschland
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Lin WH, Lin CY, Tsai CC, Yu J, Tsai WB. Spheroid Formation of Human Adipose-Derived Stem Cells on Environmentally Friendly BMA/SBMA/HEMA Copolymer-Coated Anti-Adhesive Surface. BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN 2018. [DOI: 10.1246/bcsj.20180100] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Wei-Han Lin
- Department of Chemical Engineering, National Taiwan University, No. 1, Roosevelt Rd., Sec. 4, Taipei 106, Taiwan
| | - Che-Yu Lin
- Department of Chemical Engineering, National Taiwan University, No. 1, Roosevelt Rd., Sec. 4, Taipei 106, Taiwan
| | - Ching-Cheng Tsai
- Department of Chemical Engineering, National Taiwan University, No. 1, Roosevelt Rd., Sec. 4, Taipei 106, Taiwan
| | - Jiashing Yu
- Department of Chemical Engineering, National Taiwan University, No. 1, Roosevelt Rd., Sec. 4, Taipei 106, Taiwan
| | - Wei-Bor Tsai
- Department of Chemical Engineering, National Taiwan University, No. 1, Roosevelt Rd., Sec. 4, Taipei 106, Taiwan
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Comparative Life Cycle Assessment of End-of-Life Silicon Solar Photovoltaic Modules. APPLIED SCIENCES-BASEL 2018. [DOI: 10.3390/app8081396] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The cumulative global photovoltaic (PV) waste reached 250,000 metric tonnes by the end of 2016 and is expected to increase considerably in the future. Hence, adequate end-of-life (EoL) management for PV modules must be developed. Today, most of the EoL modules go to landfill, mainly because recycling processes for PV modules are not yet economically feasible and regulation in most countries is not yet well established. Nevertheless, several methods for recycling PV modules are under development. Life cycle assessment (LCA) is a methodology that quantifies the environmental impacts of a process or a product. An attributional LCA was undertaken to compare landfill, incineration, reuse and recycling (mechanical, thermal and chemical routes) of EoL crystalline silicon (c-Si) solar modules, based on a combination of real process data and assumptions. The results show that recovery of materials from solar modules results in lower environmental impacts compared to other EoL scenarios, considering our assumptions. The impacts could be even lower with the adoption of more complex processes that can reclaim more materials. Although recycling processes can achieve good recycling rates and recover almost all materials from solar modules, attention must be paid to the use of toxic substances during the chemical routes of recycling and to the distance to recycling centres due to the impacts of transportation.
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Barul C, Carton M, Radoï L, Menvielle G, Pilorget C, Bara S, Stücker I, Luce D. Occupational exposure to petroleum-based and oxygenated solvents and hypopharyngeal and laryngeal cancer in France: the ICARE study. BMC Cancer 2018; 18:388. [PMID: 29621977 PMCID: PMC5887173 DOI: 10.1186/s12885-018-4324-7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2017] [Accepted: 03/29/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND To examine associations between occupational exposure to petroleum-based and oxygenated solvents and the risk of hypopharyngeal and laryngeal cancer. METHODS ICARE is a large, frequency-matched population-based case-control study conducted in France. Lifetime occupational history, tobacco smoking and alcohol consumption were collected. Analyses were restricted to men and included 383 cases of hypopharyngeal cancer, 454 cases of laryngeal cancer, and 2780 controls. Job-exposure matrices were used to assess exposure to five petroleum-based solvents (benzene; gasoline; white spirits; diesel, fuels and kerosene; special petroleum products) and to five oxygenated solvents (alcohols; ketones and esters; ethylene glycol; diethyl ether; tetrahydrofuran). Odds ratios (ORs) adjusted for smoking, alcohol drinking and other potential confounders and 95% confidence intervals (CI) were estimated with unconditional logistic models. RESULTS No significant association was found between hypopharyngeal or laryngeal cancer risk and exposure to the solvents under study. Non-significantly elevated risks of hypopharyngeal cancer were found in men exposed to high cumulative levels of white spirits (OR = 1.46; 95% CI: 0.88-2.43) and tetrahydrofuran (OR = 2.63; 95CI%: 0.55-12.65), with some indication of a dose-response relationship (p for trend: 0.09 and 0.07 respectively). CONCLUSION This study provides weak evidence for an association between hypopharyngeal cancer and exposure to white spirits and tetrahydrofuran, and overall does not suggest a substantial role of exposure to petroleum-based or oxygenated solvents in hypopharyngeal or laryngeal cancer risk.
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Affiliation(s)
- Christine Barul
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail)-UMR_S 1085, Pointe-à-Pitre, F-97110, France.,Univ Paris Sud, Paris Saclay University, Orsay, France
| | - Matthieu Carton
- Département de Biométrie, Institut Curie, DRCI, PSL Research University, Paris, France
| | - Loredana Radoï
- CESP, Cancer and Environment Team, INSERM U1018, Université Paris-Sud, Université Paris-Saclay, Villejuif, France.,Faculty of Dental Surgery, University Paris Descartes, Paris, France
| | - Gwenn Menvielle
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, Institut Pierre Louis d'épidémiologie et de Santé Publique (IPLESP UMRS 1136), Paris, France
| | - Corinne Pilorget
- The French Public Health Agency, Saint Maurice, France.,Ifsttar, UMRESTTE, UMR T_9405, Univ Lyon, Claude Bernard Lyon1 University, Lyon, France
| | - Simona Bara
- Manche Cancer Registry, Cotentin Hospital, Cherbourg-Octeville, France
| | - Isabelle Stücker
- CESP, Cancer and Environment Team, INSERM U1018, Université Paris-Sud, Université Paris-Saclay, Villejuif, France
| | - Danièle Luce
- Univ Rennes, Inserm, EHESP, Irset (Institut de recherche en santé, environnement et travail)-UMR_S 1085, Pointe-à-Pitre, F-97110, France.
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Qian W, Hu X, He W, Zhan R, Liu M, Zhou D, Huang Y, Hu X, Wang Z, Fei G, Wu J, Xing M, Xia H, Luo G. Polydimethylsiloxane incorporated with reduced graphene oxide (rGO) sheets for wound dressing application: Preparation and characterization. Colloids Surf B Biointerfaces 2018; 166:61-71. [PMID: 29544129 DOI: 10.1016/j.colsurfb.2018.03.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 02/27/2018] [Accepted: 03/06/2018] [Indexed: 11/18/2022]
Abstract
Toward fabricating a novel multifunctional wound dressing material, we incorporated a series of contents of reduced graphene oxide (rGO) sheets into polydimethylsiloxane (PDMS) matrix to prepare the rGO-PDMS composite membrane and be used for wound dressing. The pore structure, dispersion of rGO, physical properties, water vapor transmission rate (WVTR), cytotoxicity and antibacterial activity were studied. Finally, the effect of the rGO-PDMS composite membrane on wound healing was investigated on a murine full-thickness skin wound model. The rGO-PDMS composite membrane exhibited bionic performance (ordered pore structure and suitable WVTR), improved mechanical properties, good compatibility and effective antibacterial activity. In vivo experiment indicated that the rGO-PDMS composite membrane could accelerate wound healing via enhancement of the re-epithelialization and granulation tissue formation. These findings suggest that rGO doping PDMS uniquely resulted in a multifunctional material for potential use in wound dressing.
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Affiliation(s)
- Wei Qian
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Xiaodong Hu
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, China
| | - Weifeng He
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Rixing Zhan
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Menglong Liu
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Daijun Zhou
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Yong Huang
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Xiaohong Hu
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China
| | - Zhanhua Wang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, China
| | - Guoxia Fei
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, China
| | - Jun Wu
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China; Department of Burns, The First Affiliated Hospital of Sun Yat-sen University, Guangzhou, China
| | - Malcolm Xing
- Departments of Mechanical Engineering, Biochemistry and Medical Genetics, University of Manitoba, and Manitoba Institute of Child Health, Winnipeg, MB R3T 2N2, Canada
| | - Hesheng Xia
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Chengdu, China.
| | - Gaoxing Luo
- Institute of Burn Research, State Key Laboratory of Trauma, Burn and Combined Injury, Key Laboratory of Disease Proteomics of Chongqing, Southwest Hospital, Third Military Medical University (Army Medical University), Chongqing, China.
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Zhang Y, Cattrall RW, Kolev SD. Fast and Environmentally Friendly Microfluidic Technique for the Fabrication of Polymer Microspheres. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:14691-14698. [PMID: 29227109 DOI: 10.1021/acs.langmuir.7b03574] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
This paper reports on a novel microfluidic technique for the fabrication of microspheres of synthetic polymers including poly(vinyl chloride) (PVC), poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), poly(lactic acid) (PLA), and polystyrene (PS). The polymers are dissolved in tetrahydrofuran (THF) and the method is based on the diminished solubility of THF in a 20% (w/v) NaCl solution which allows the formation of droplets of the polymer solution. These polymer solution droplets are generated in a microfluidic system and their desolvation is accomplished within seconds by allowing the droplets to rise by buoyancy through a NaCl solution with a concentration lower than 15%. The size and morphology of the resultant polymer microspheres have been investigated by optical and scanning electron microscopy. Apart from the elimination of the use of highly toxic solvents as in conventional methods for manufacturing of polymer microspheres, the newly developed technique has the advantages of providing faster desolvation of the polymer solution droplets and a higher yield of microspheres compared to emulsification-based techniques.
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Affiliation(s)
- Yanlin Zhang
- School of Chemistry, The University of Melbourne , Victoria 3010, Australia
| | - Robert W Cattrall
- School of Chemistry, The University of Melbourne , Victoria 3010, Australia
| | - Spas D Kolev
- School of Chemistry, The University of Melbourne , Victoria 3010, Australia
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Santos RP, Souza LM, Balieiro AL, Soares CMF, Lima ÁS, Souza RL. Integrated process of extraction and purification of betanin from Opuntia ficus-indica using aqueous two-phase systems based on THF and sodium salts. SEP SCI TECHNOL 2017. [DOI: 10.1080/01496395.2017.1397022] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | - Luana M. Souza
- Universidade Tiradentes, Process Engineering, Aracaju SE, Brazil
| | | | - Cleide M. F. Soares
- Universidade Tiradentes, Process Engineering, Aracaju SE, Brazil
- Instituto de Tecnologia e Pesquisa - ITP/LPA, Aracaju SE, Brazil
| | - Álvaro S. Lima
- Universidade Tiradentes, Process Engineering, Aracaju SE, Brazil
- Instituto de Tecnologia e Pesquisa - ITP/LPA, Aracaju SE, Brazil
| | - Ranyere L. Souza
- Universidade Tiradentes, Process Engineering, Aracaju SE, Brazil
- Instituto de Tecnologia e Pesquisa - ITP/LPA, Aracaju SE, Brazil
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Gurkov A, Sadovoy A, Shchapova E, Teh C, Meglinski I, Timofeyev M. Microencapsulated fluorescent pH probe as implantable sensor for monitoring the physiological state of fish embryos. PLoS One 2017; 12:e0186548. [PMID: 29045437 PMCID: PMC5646854 DOI: 10.1371/journal.pone.0186548] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 10/03/2017] [Indexed: 11/29/2022] Open
Abstract
In vivo physiological measurement is a major challenge in modern science and technology, as is environment conservation at the global scale. Proper toxicological testing of widely produced mixtures of chemicals is a necessary step in the development of new products, allowing us to minimize the human impact on aquatic ecosystems. However, currently available bioassay-based techniques utilizing small aquatic organisms such as fish embryos for toxicity testing do not allow assessing in time the changes in physiological parameters in the same individual. In this study, we introduce microencapsulated fluorescent probes as a promising tool for in vivo monitoring of internal pH variation in zebrafish embryos. The pH alteration identified under stress conditions demonstrates the applicability of the microencapsulated fluorescent probes for the repeated analysis of the embryo’s physiological state. The proposed approach has strong potential to simultaneously measure a range of physiological characteristics using a set of specific fluorescent probes and to finally bring toxicological bioassays and related research fields to a new level of effectiveness and sensitivity.
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Affiliation(s)
- Anton Gurkov
- Institute of Biology, Irkutsk State University, Irkutsk, Russia
- Baikal Research Centre, Irkutsk, Russia
| | - Anton Sadovoy
- Institute of Materials Research and Engineering, Agency for Science, Technology and Research, Singapore
- * E-mail: (MT); (IM); (AS)
| | | | - Cathleen Teh
- Institute of Molecular and Cell Biology, Agency for Science, Technology and Research, Singapore
| | - Igor Meglinski
- Institute of Biology, Irkutsk State University, Irkutsk, Russia
- Optoelectronics and Measurement Techniques Laboratory, University of Oulu, Oulu, Finland
- * E-mail: (MT); (IM); (AS)
| | - Maxim Timofeyev
- Institute of Biology, Irkutsk State University, Irkutsk, Russia
- * E-mail: (MT); (IM); (AS)
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Parris P, Duncan JN, Fleetwood A, Beierschmitt WP. Calculation of a permitted daily exposure value for the solvent 2-methyltetrahydrofuran. Regul Toxicol Pharmacol 2017; 87:54-63. [DOI: 10.1016/j.yrtph.2017.04.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Revised: 04/24/2017] [Accepted: 04/26/2017] [Indexed: 10/19/2022]
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39
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Li M, Liu Y, He Y, Mathieu J, Hatton J, DiGuiseppi W, Alvarez PJJ. Hindrance of 1,4-dioxane biodegradation in microcosms biostimulated with inducing or non-inducing auxiliary substrates. WATER RESEARCH 2017; 112:217-225. [PMID: 28161562 DOI: 10.1016/j.watres.2017.01.047] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 01/20/2017] [Accepted: 01/23/2017] [Indexed: 06/06/2023]
Abstract
A microcosm study was conducted to assess two biostimulation strategies (relative to natural attenuation) to bioremediate 1,4-dioxane contamination at a site in west Texas. Dioxane concentrations were relatively low (<300 μg/L), which represents a potential challenge to sustain and induce specific degraders. Thus, biostimulation was attempted with an auxiliary substrate known to induce dioxane-degrading monooxygenases (i.e., tetrahydrohyran [THF]) or with a non-inducing growth substrate (1-butanol [1-BuOH]). Amendment of 1-BuOH (100 mg/L) to microcosms that were not oxygen-limited temporarily enhanced dioxane biodegradation by the indigenous microorganisms. However, this stimulatory effect was not sustained by repeated amendments, which might be attributed to i) the inability of 1-BuOH to induce dioxane-degrading enzymes, ii) curing of catabolic plasmids, iii) metabolic flux dilution and catabolite repression, and iv) increased competition by commensal bacteria that do not degrade dioxane. Experiments with the archetype dioxane degrader Pseudonocardia dioxanivorans CB1190 repeatedly amended with 1-BuOH (500 mg/L added weekly for 4 weeks) corroborated the partial curing of catabolic plasmids (9.5 ± 7.4% was the plasmid retention ratio) and proliferation of derivative segregants that lost their ability to degrade dioxane. Addition of THF (300 μg/L) also had limited benefit due to competitive inhibition; significant dioxane degradation occurred only when the THF concentration decreased below approximately 160 μg/L. Overall, these results illustrate the importance of considering the possibility of unintentional hindrance of catabolism associated with the addition of auxiliary carbon sources to bioremediate aquifers impacted with trace concentrations of dioxane.
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Affiliation(s)
- Mengyan Li
- Department of Chemistry and Environmental Science, New Jersey Institute of Technology, Newark, NJ, USA; Department of Civil and Environmental Engineering, Rice University, Houston, TX, USA.
| | - Yuanyuan Liu
- Research Center of Resource Environment and Urban Planning, Changsha University of Science and Technology, Changsha, Hunan, China
| | - Ya He
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, USA
| | - Jacques Mathieu
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, USA
| | | | | | - Pedro J J Alvarez
- Department of Civil and Environmental Engineering, Rice University, Houston, TX, USA
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40
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Ju C, Kim T, Kang H. Liquid crystal alignment behaviors on capsaicin substituted polystyrene films. RSC Adv 2017. [DOI: 10.1039/c7ra08321a] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
The liquid crystal (LC) alignment behavior on plant-based capsaicin substituted polystyrene film was investigated. This can give the basic idea for the design of eco-friendly LC alignment layer based on renewable resource containing polymer film.
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Affiliation(s)
- Changha Ju
- Department of Chemical Engineering
- Dong-A University
- Busan 604-714
- Korea
| | - Taehyung Kim
- Department of Chemical Engineering
- Dong-A University
- Busan 604-714
- Korea
| | - Hyo Kang
- Department of Chemical Engineering
- Dong-A University
- Busan 604-714
- Korea
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Bixner O, Reimhult E. Controlled magnetosomes: Embedding of magnetic nanoparticles into membranes of monodisperse lipid vesicles. J Colloid Interface Sci 2016; 466:62-71. [DOI: 10.1016/j.jcis.2015.11.071] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Revised: 11/27/2015] [Accepted: 11/30/2015] [Indexed: 11/16/2022]
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Kubovičová L, Bürglová K, Hlaváč J. New (green) methodology for efficient hydrazine cleavage. Org Biomol Chem 2016; 14:4824-8. [DOI: 10.1039/c6ob00737f] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An efficient method for removal of the hydrazine group from (hetero)aromatic substrates has been developed.
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Affiliation(s)
- Lenka Kubovičová
- Department of Organic Chemistry
- Faculty of Science
- Palacký University
- 771 46 Olomouc
- Czech Republic
| | - Kristýna Bürglová
- Institute of Molecular and Translation Medicine
- Faculty of Medicine and Dentistry
- 779 00 Olomouc
- Czech Republic
| | - Jan Hlaváč
- Department of Organic Chemistry
- Faculty of Science
- Palacký University
- 771 46 Olomouc
- Czech Republic
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Li X, Woodman M, Wang SC. High-performance liquid chromatography with fluorescence detection for the rapid analysis of pheophytins and pyropheophytins in virgin olive oil. J Sep Sci 2015; 38:2813-8. [DOI: 10.1002/jssc.201401240] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 05/16/2015] [Accepted: 05/22/2015] [Indexed: 11/05/2022]
Affiliation(s)
- Xueqi Li
- University of California Davis Olive Center; Davis CA USA
| | | | - Selina C. Wang
- University of California Davis Olive Center; Davis CA USA
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Chen DZ, Ding YF, Zhou YY, Ye JX, Chen JM. Biodegradation kinetics of tetrahydrofuran, benzene, toluene, and ethylbenzene as multi-substrate by Pseudomonas oleovorans DT4. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2014; 12:371-84. [PMID: 25561017 PMCID: PMC4306867 DOI: 10.3390/ijerph120100371] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/02/2014] [Accepted: 12/22/2014] [Indexed: 11/16/2022]
Abstract
The biodegradation kinetics of tetrahydrofuran, benzene (B), toluene (T), and ethylbenzene (E) were systematically investigated individually and as mixtures by a series of aerobic batch degradation experiments initiated by Pseudomonas oleovorans DT4. The Andrews model parameters, e.g., maximum specific growth rates (μmax), half saturation, and substrate inhibition constant, were obtained from single-substrate experiments. The interaction parameters in the sum kinetics model (SKIP) were obtained from the dual substrates. The μmax value of 1.01 for tetrahydrofuran indicated that cell growth using tetrahydrofuran as carbon source was faster than the growth on B (μmax, B = 0.39) or T (μmax, T = 0.39). The interactions in the dual-substrate experiments, including genhancement, inhibition, and co-metabolism, in the mixtures of tetrahydrofuran with B or T or E were identified. The degradation of the four compounds existing simultaneously could be predicted by the combination of SKIP and co-metabolism models. This study is the first to quantify the interactions between tetrahydrofuran and BTE.
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Affiliation(s)
- Dong-Zhi Chen
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Yun-Feng Ding
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Yu-Yang Zhou
- School of Environmental Science and Engineering, Zhejiang Gongshang University, Hangzhou 310012, China.
| | - Jie-Xu Ye
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
| | - Jian-Meng Chen
- College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou 310032, China.
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Hu H, Xin JH, Hu H, Wang X, Lu X. Organic liquids-responsive β-cyclodextrin-functionalized graphene-based fluorescence probe: label-free selective detection of tetrahydrofuran. Molecules 2014; 19:7459-79. [PMID: 24914894 PMCID: PMC6270893 DOI: 10.3390/molecules19067459] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2014] [Revised: 06/03/2014] [Accepted: 06/04/2014] [Indexed: 01/19/2023] Open
Abstract
In this study, a label-free graphene-based fluorescence probe used for detection of volatile organic liquids was fabricated by a simple, efficient and low-cost method. To fabricate the probe, a bio-based β-cyclodextrin (β-CD) was firstly grafted on reduced graphene surfaces effectively and uniformly, as evidenced by various characterization techniques such as Ultraviolet/Visible spectroscopy, Fourier transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, scanning electron microscopy and transmission electron microscopy. The subsequent inclusion of Rhodamine B (RhB) into the inner cavities of the β-CD grafted on the graphene surfaces was achieved easily by a solution mixing method, which yielded the graphene-based fluorescent switch-on probe. In addition, the gradual and controllable quenching of RhB by Fluorescence Resonance Energy Transfer from RhB to graphene during the process of stepwise accommodation of the RhB molecules into the β-CD-functionalized graphene was investigated in depth. A wide range of organic solvents was examined using the as-fabricated fluorescence probe, which revealed the highest sensitivity to tetrahydrofuran with the detection limit of about 1.7 μg/mL. Some insight into the mechanism of the different responsive behaviors of the fluorescence sensor to the examined targets was also described.
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Affiliation(s)
- Huawen Hu
- The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - John H Xin
- The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Hong Hu
- The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Xiaowen Wang
- The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Xinkun Lu
- The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
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