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Journal articles on the topic 'Dioxane'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Lee, Kang Hoon, Young Min Wie, Deokjin Jahng, and Ick Tae Yeom. "Effects of Additional Carbon Sources in the Biodegradation of 1,4-Dioxane by a Mixed Culture." Water 12, no. 6 (2020): 1718. http://dx.doi.org/10.3390/w12061718.

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A mixed culture utilizing 1,4-dioxane as a sole carbon and energy source was obtained from the activated sludge at a textile wastewater treatment plant. The biodegradation of 1,4-dioxane was characterized by a model based on the Monod equation. The effects of the presence of easily degradable carbon sources other than 1,4-dioxane were investigated using dextrose. Structural analogs commonly found in 1,4-dioxane-containing wastewater such as tetrahydrofuran (THF), 2-methyl-1,3-dioxolane, and 1,4-dioxene were also evaluated for their potential effects on 1,4-dioxane biodegradation. The presence

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2

Šafář, Peter, František Považanec, Naďa Prónayová, et al. "Dichotomy in the Ring Opening Reaction of 5-[(2-Furyl)methylidene]-2,2-dimethyl-1,3-dioxane-4,6-dione with Cyclic Secondary Amines." Collection of Czechoslovak Chemical Communications 65, no. 12 (2000): 1911–38. http://dx.doi.org/10.1135/cccc20001911.

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5-[(2-Furyl)methylidene]-2,2-dimethyl-1,3-dioxane-4,6-dione (1a) treated with equimolar amount of pyrrolidine or hexahydroazepine afforded 5-(pyrrolidine)- (2a) or 5-[(hexahydro- azepine-1-yl)-2-hydroxypenta-2,4-dien-1-ylidene]-2,2-dimethyl-1,3-dioxane-4,6-dione (2d). Their treatment with hydrobromic acid led to cyclization and formation of stable 5-cyclopentenyl-4H-1,3-dioxine hydrobromides (3a, 3d). Under the same conditions 1a treated with morpholine or piperidine yielded a mixture of 2b, 3b and 2c, 3c, respectively. The corresponding 3-substituted furans 1b-1e gave only substituted 5-cyclo

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3

Griesbaum, Karl, Gilbert Kiesel, Henri Mertens, Petra Krieger-Beck, and Henning Henke. "Acid-catalyzed reactions of six- and seven-membered cyclic hemiperacetals and peracetals and of related bicyclic ozonides." Canadian Journal of Chemistry 72, no. 11 (1994): 2198–204. http://dx.doi.org/10.1139/v94-280.

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HCl-catalyzed reactions of the hemiperacetals 3-methoxy-3-methyl-7-hydroxy-1,2-dioxepane (1a) and 3-methoxy-3-methyl-6-hydroxy-1,2-dioxane (1b) and of the related ozonides 1-methyl-6,7,8-trioxabicyclo[3.2.1]octane (2a) and 1-methyl-5,6,7-trioxabicyclo[2.2.1]heptane (2b) gave peroxidic monocyclic (11—13), bicyclic (14), and (or) tricyclic (15) products. By contrast, reactions of the peracetals corresponding to 1a and 1b, viz., 3-methyl-3,7-dimethoxy-1,2-dioxepane (13a) and 3-methyl-3,6-dimethoxy-1,2-dioxane (13b) gave only non-peroxidic products. Reactions of the persubstituted peracetals 3,6-d

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4

Malkapuram, Surya Teja, Shirish Hari Sonawane, Manoj P. Rayaroth, et al. "The Sonocatalytic Activation of Persulfates on Iron Nanoparticle Decorated Zeolite for the Degradation of 1,4-Dioxane in Aquatic Environments." Catalysts 13, no. 7 (2023): 1065. http://dx.doi.org/10.3390/catal13071065.

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In the chemical industry, 1,4-diethylene dioxide, commonly called dioxane, is widely used as a solvent as well as a stabilizing agent for chlorinated solvents. Due to its high miscibility, dioxane is a ubiquitous water contaminant. This study investigates the effectiveness of catalyst- and ultrasound (US)-assisted persulfate (PS) activation with regard to degrading dioxane. As a first step, a composite catalyst was prepared using zeolite. A sonochemical dispersion and reduction method was used to dope zeolite with iron nanoparticles (FeNP/Z). In the subsequent study, the reaction kinetics of d

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Borisova, Yu G., A. K. Bulgakov, N. S. Khusnutdinova, et al. "Synthesis and antimicrobial activity of functionally substituted 1,3-dioxacycloalkanes." Proceedings of Universities. Applied Chemistry and Biotechnology 14, no. 4 (2025): 453–61. https://doi.org/10.21285/achb.954.

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One of the directions in the development of organic chemistry is the synthesis of biologically active compounds, including those with bactericidal activity, based on available petrochemical raw materials. In order to expand the library of bioactive compounds containing a 1,3-dioxacyclane fragment, the synthesis of derivatives of 5-acyl-5-isopropyl-1,3-dioxane – 1-(5-isopropyl-1,3-dioxane-5-yl)ethanol and (5-isopropyl-1,3-dioxane-5-yl)ethyl phenyl carbamate was carried out. The effect of synthesized compounds containing a 1,3-dioxacyclane fragment on the growth of strains of gram-negative and g

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6

Vainberg, Simon, Kevin McClay, Hisako Masuda, et al. "Biodegradation of Ether Pollutants by Pseudonocardia sp. Strain ENV478." Applied and Environmental Microbiology 72, no. 8 (2006): 5218–24. http://dx.doi.org/10.1128/aem.00160-06.

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ABSTRACT A bacterium designated Pseudonocardia sp. strain ENV478 was isolated by enrichment culturing on tetrahydrofuran (THF) and was screened to determine its ability to degrade a range of ether pollutants. After growth on THF, strain ENV478 degraded THF (63 mg/h/g total suspended solids [TSS]), 1,4-dioxane (21 mg/h/g TSS), 1,3-dioxolane (19 mg/h/g TSS), bis-2-chloroethylether (BCEE) (12 mg/h/g TSS), and methyl tert-butyl ether (MTBE) (9.1 mg/h/g TSS). Although the highest rates of 1,4-dioxane degradation occurred after growth on THF, strain ENV478 also degraded 1,4-dioxane after growth on s

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7

Lu, Yaobin, Hualei Shi, Jialiang Yao, Guangli Liu, Haiping Luo, and Renduo Zhang. "1,4-dioxane degradation using a pulsed switching peroxi-coagulation process." Journal of Water Reuse and Desalination 11, no. 2 (2021): 268–78. http://dx.doi.org/10.2166/wrd.2021.092.

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Abstract Widely used in chemical product manufacture, 1,4-dioxane is one of the emerging contaminants, and it poses great risk to human health and the ecosystem. The aim of this study was to degrade 1,4-dioxiane using a pulsed switching peroxi-coagulation (PSPC) process. The electrosynthesis of H2O2 on cathode and Fe2+ production on iron sacrifice anode were optimized to enhance the 1,4-dioxane degradation. Under current densities of 5 mA/cm2 (H2O2) and 1 mA/cm2 (Fe2+), 95.3 ± 2.2% of 200 mg/L 1,4-dioxane was removed at the end of 120 min operation with the optimal pulsed switching frequency o

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8

Zhong, Guo Lun, Yu Jiao Jiang, Rong Li, Fei Chen, Hong Lei Mao, and Yong Hong Wang. "Preparation and Optical Properties of Poly[3,4-Bis-(1,3-Dioxane-2-Ylethyl)] Thiophene." Advanced Materials Research 391-392 (December 2011): 1423–26. http://dx.doi.org/10.4028/www.scientific.net/amr.391-392.1423.

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A new polythiophene derivative, poly[3,4-bis-(1,3-dioxane-2-ylethyl) thiophene] (PBDT) with two 1,3-dioxane groups was synthesized via two-step strategy. Firstly, a precursor polymer poly(3,4-dibromothiophene) (PDBrT) was prepared, and secondly the bromo-atoms were substituted by 1,3-dioxan-2-ylethyl groups to get the target polymer. The later reaction was monitored by FTIR spectroscopy. Molecular weights of PBDT were measured by GPC. In addition, the optical absorption and photoluminescence (PL) of PBDT and PDBrT were investigated and demonstrated that the maximum emission wavelength of PBDT

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9

McClelland, Robert A., and Claude Moreau. "Reversible ring opening in the hydrolysis of spiro ortho esters." Canadian Journal of Chemistry 63, no. 10 (1985): 2673–78. http://dx.doi.org/10.1139/v85-444.

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Hydrolysis kinetics are reported for four spiro ortho esters: 3,4-dihydro-6-methoxy-1H-2-benzopyran-1-spiro-2′-1′,3′-dioxolane (13), its 1′,3′-dioxane analog (14), and the 6-unsubstituted versions of each (11 and 12). For comparison, also included are the diethoxy analogs: 1,1-diethoxy-3,4-dihydro-6-methoxy-1H-2-benzopyran (10) and the 6-unsubstituted compound (9). Product analysis implicates an initial opening of the dioxolane or dioxane ring in the spiro ortho esters, as expected on the basis of stereoelectronic considerations. The intermediate dialkoxycarbocations can be observed in HCl sol

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10

Gärtner, Martin, Helmar Görls та Matthias Westerhausen. "Poly[[μ-dioxane-κ2O:O′-dioxane-κO-μ-diphenylamido-κ2N:N-potassium] dioxane solvate]". Acta Crystallographica Section E Structure Reports Online 63, № 9 (2007): m2287—m2288. http://dx.doi.org/10.1107/s1600536807037427.

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Raskil’dina, Gul’nara Z., Evgeniya A. Yakovenko, Luisa M. M. Mryasova, and Simon S. Zlotskii. "SYNTHESIS AND HERBICID ACTIVITY OF ARYLOXYACETIC ACIDS AND AMIDES OF ARYLOXY ACETIC ACIDS CONTAINING CYCLOACETAL FRAGMENT." IZVESTIYA VYSSHIKH UCHEBNYKH ZAVEDENIY KHIMIYA KHIMICHESKAYA TEKHNOLOGIYA 62, no. 1 (2018): 91–97. http://dx.doi.org/10.6060/ivkkt.20196201.5753.

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The herbicidal activity of esters and amides based on commercially available phenoxy chlorides and 2,4-dichlorophenoxyacetic acids was studied. Esters of 2,2-methyl-4-hydroxymethyl-1,3-dioxolane, 5-ethyl-5-hydroxymethyl-1,3-dioxane and 1,3-dioxolan-4-ylmethanol and 1,3-dioxane-5 -ol (glycerin formulas), as well as amides containing gem-dichlorocyclopropane and 1,3-dioxolane fragments were obtained. The acid chlorides, 1,3-dioxacycloalkanes and secondary amines were prepared according to standard basic methods. Esters and amides were synthesized from these starting compounds in a short time and

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12

Grostern, Ariel, Christopher M. Sales, Wei-Qin Zhuang, Onur Erbilgin, and Lisa Alvarez-Cohen. "Glyoxylate Metabolism Is a Key Feature of the Metabolic Degradation of 1,4-Dioxane by Pseudonocardia dioxanivorans Strain CB1190." Applied and Environmental Microbiology 78, no. 9 (2012): 3298–308. http://dx.doi.org/10.1128/aem.00067-12.

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ABSTRACTThe groundwater contaminant 1,4-dioxane (dioxane) is transformed by several monooxygenase-expressing microorganisms, but only a few of these, includingPseudonocardia dioxanivoransstrain CB1190, can metabolize the compound as a sole carbon and energy source. However, nothing is yet known about the genetic basis of dioxane metabolism. In this study, we used a microarray to study differential expression of genes in strain CB1190 grown on dioxane, glycolate (a previously identified intermediate of dioxane degradation), or pyruvate. Of eight multicomponent monooxygenase gene clusters carrie

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13

Sima, Sergiu, and Catinca Secuianu. "The Effect of Functional Groups on the Phase Behavior of Carbon Dioxide Binaries and Their Role in CCS." Molecules 26, no. 12 (2021): 3733. http://dx.doi.org/10.3390/molecules26123733.

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In recent years we have focused our efforts on investigating various binary mixtures containing carbon dioxide to find the best candidate for CO2 capture and, therefore, for applications in the field of CCS and CCUS technologies. Continuing this project, the present study investigates the phase behavior of three binary systems containing carbon dioxide and different oxygenated compounds. Two thermodynamic models are examined for their ability to predict the phase behavior of these systems. The selected models are the well-known Peng–Robinson (PR) equation of state and the General Equation of S

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14

Wang, Yingning, Fang Ma, Jixian Yang, Haijuan Guo, Delin Su, and Lan Yu. "Adaption and Degradation Strategies of Methylotrophic 1,4-Dioxane Degrading Strain Xanthobacter sp. YN2 Revealed by Transcriptome-Scale Analysis." International Journal of Molecular Sciences 22, no. 19 (2021): 10435. http://dx.doi.org/10.3390/ijms221910435.

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Biodegradation of 1,4-dioxane (dioxane) contamination has gained much attention for decades. In our previous work, we isolated a highly efficient dioxane degrader, Xanthobacter sp. YN2, but the underlying mechanisms of its extraordinary degradation performance remained unresolved. In this study, we performed a comparative transcriptome analysis of YN2 grown on dioxane and citrate to elucidate its genetic degradation mechanism and investigated the transcriptomes of different dioxane degradation stages (T0, T24, T48). We also analyzed the transcriptional response of YN2 over time during which th

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15

Guan, Xiangyu, Fei Liu, Jing Wang, Caoxiang Li, and Xiaoxuan Zheng. "Mechanism of 1,4-dioxane microbial degradation revealed by 16S rRNA and metatranscriptomic analyses." Water Science and Technology 77, no. 1 (2017): 123–33. http://dx.doi.org/10.2166/wst.2017.498.

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Abstract 1,4-Dioxane (dioxane), a probable human carcinogen, often exists in industrial wastewater and domestic sewage. In this study, we applied 16S rRNA and metatranscriptomic methods to analyze the dioxane biodegradation mechanism by activated sludge. Tetrahydrofuran (THF) was added as an essential co-metabolite to promote the degradation of dioxane. We found the dioxane removal ratio increased with increasing THF concentrations. When the THF concentration increased from 60.0 to 200.0 mg/L, the dioxane degradation rate was stable. Three additions of ∼60.0 mg/L THF resulted in better dioxane

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Lee, Kang Hoon, Young Min Wie, and Yong-Soo Lee. "Characterization of 1,4-Dioxane Biodegradation by a Microbial Community." Water 12, no. 12 (2020): 3372. http://dx.doi.org/10.3390/w12123372.

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In this study, a microbial community of bacteria was investigated for 1,4-dioxane(1,4-D) biodegradation. The enriched culture was investigated for 1,4-dioxane mineralization, co-metabolism of 1,4-dioxane and extra carbon sources, and characterized 1,4-dioxane biodegradation kinetics. The mineralization test indicates that the enriched culture was able to degrade 1,4-dioxane as the sole carbon and energy source. Interestingly, the distribution of 1,4-dioxane into the final biodegrading products were 36.9% into biomass, 58.3% completely mineralized to CO2, and about 4% escaped as VOC. The enrich

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Tang, Yuyin, and Xinwei Mao. "Recent Advances in 1,4-Dioxane Removal Technologies for Water and Wastewater Treatment." Water 15, no. 8 (2023): 1535. http://dx.doi.org/10.3390/w15081535.

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1,4-Dioxane is a contaminant of emerging concern and a probable human carcinogen that has been widely detected in aqueous environments. However, the removal of 1,4-dioxane by conventional water and wastewater treatment plants had proven to be ineffective due to its unique physicochemical properties. The development of innovative technologies for both in-situ and ex-situ treatment of 1,4-dioxane to meet increasingly strict standards is in urgent need. This review summarizes the current available physicochemical and biological treatment technologies for the removal of 1,4-dioxane from both water

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Páv, Ondřej, Ivan Barvík, Radek Liboska, et al. "Tuning the hybridization properties of modified oligonucleotides: from flexible to conformationally constrained phosphonate internucleotide linkages." Organic & Biomolecular Chemistry 15, no. 3 (2017): 701–7. http://dx.doi.org/10.1039/c6ob02571d.

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We utilized the concept of conformational restriction to prepare a set of constrained oligonucleotides derived from 1,4-dioxane and 1,3-dioxolane-locked nucleoside phosphonates and evaluated their hybridization abilities.

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Gedalanga, Phillip B., Peerapong Pornwongthong, Rebecca Mora, et al. "Identification of Biomarker Genes To Predict Biodegradation of 1,4-Dioxane." Applied and Environmental Microbiology 80, no. 10 (2014): 3209–18. http://dx.doi.org/10.1128/aem.04162-13.

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ABSTRACTBacterial multicomponent monooxygenase gene targets inPseudonocardia dioxanivoransCB1190 were evaluated for their use as biomarkers to identify the potential for 1,4-dioxane biodegradation in pure cultures and environmental samples. Our studies using laboratory pure cultures and industrial activated sludge samples suggest that the presence of genes associated with dioxane monooxygenase, propane monooxygenase, alcohol dehydrogenase, and aldehyde dehydrogenase are promising indicators of 1,4-dioxane biotransformation; however, gene abundance was insufficient to predict actual biodegradat

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Y. K. Meshram, Y. K. Meshram, K. N. Sonune K.N.Sonune, and Rohinee R. Dharamkar. "Studies of Acoustic Properties of Substituted Heterocyclic Drugs in Dioxane & Dioxane-Water Mixture At 290C." Indian Journal of Applied Research 4, no. 7 (2011): 75–78. http://dx.doi.org/10.15373/2249555x/july2014/20.

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Choi, Moon-Seop, Ki-Seung Choi, and Kye-Heon Oh. "Effects of Several Physicochemical Factors on the Biodegradation of 1,4-Dioxane by Microbial Consortium CDIK-3 Enriched from Industrial Wastewater." Journal of Korean Society of Environmental Engineers 42, no. 8 (2020): 381–92. http://dx.doi.org/10.4491/ksee.2020.42.8.381.

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Objective : With the ultimate aim of application for effluent treatment, the relationships between 1,4-dioxane degradation by microbial consortium CDIK-3 and several relevant physicochemical environmental parameters were investigated.Methods : Microbial consortium CDIK-3 enriched from an industrial wastewater sample developed to grow aerobically with 1,4-dioxane as the sole carbon substrate was used to evaluate the degradation of 1,4-dioxane depending on the various environmental parameters and HPLC methodology was used to measure residual 1,4-dioxane in the test consortium.Results and Discuss

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22

Polacki, Zenon, and Janusz Rak. "Theoretical Approach in Explanation of Energy Donor Properties of 1,4-Dioxane and 1,4-Dioxane-Water Complexes." Zeitschrift für Naturforschung A 43, no. 7 (1988): 621–26. http://dx.doi.org/10.1515/zna-1988-0702.

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Abstract The CNDO/2 CI method was used for the examination of 1,4-dioxane and 1,4-dioxane-water complexes (2:1), taking into account various conformations of the dioxane molecule. The energies of the molecules in the ground and excited states, the energies of hydrogen bond formation, the dipole moments, the transition moments, and the oscillator strengths for both the complexed and isolated 1,4-dioxane molecules were evaluated. The results of these studies are used to reveal the influence of water on the features of energy transfer from excited, by y-radiation, 1,4-dioxane or dioxane-water com

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Tusher, Tanmoy Roy, Takuya Shimizu, Chihiro Inoue, and Mei-Fang Chien. "Enrichment and Analysis of Stable 1,4-dioxane-Degrading Microbial Consortia Consisting of Novel Dioxane-Degraders." Microorganisms 8, no. 1 (2019): 50. http://dx.doi.org/10.3390/microorganisms8010050.

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Biodegradation of 1,4-dioxane, a water contaminant of emerging concern, has drawn substantial attention over the last two decades. A number of dioxane-degraders have been identified, though many of them are unable to metabolically utilize 1,4-dioxane. Moreover, it is considered more preferable to use microbial consortia rather than the pure strains, especially in conventional bioreactors for industrial wastewater treatment. In the present study, a stable 1,4-dioxane-degrading microbial consortium was enriched, namely 112, from industrial wastewater by nitrate mineral salt medium (NMSM). The co

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Tian, Gui-Peng, Qian-Yuan Wu, Ang Li, Wen-Long Wang, and Hong-Ying Hu. "Enhanced decomposition of 1,4-dioxane in water by ozonation under alkaline condition." Water Science and Technology 70, no. 12 (2014): 1934–40. http://dx.doi.org/10.2166/wst.2014.414.

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1,4-Dioxane is a probable human carcinogenic and refractory substance that is widely detected in aquatic environments. Traditional wastewater treatment processes, including activated sludge, cannot remove 1,4-dioxane. Removing 1,4-dioxane with a reaction kinetic constant of 0.32 L/(mol·s) by using ozone, a strong oxidant, is difficult. However, under alkaline environment, ozone generates a hydroxyl radical (•OH) that exhibits strong oxidative potential. Thus, the ozonation of 1,4-dioxane in water under different pH conditions was investigated in this study. In neutral solution, with an inlet o

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Venkatesha, N. J., Y. S. Bhat, and B. S. Jai Prakash. "Dealuminated BEA zeolite for selective synthesis of five-membered cyclic acetal from glycerol under ambient conditions." RSC Advances 6, no. 23 (2016): 18824–33. http://dx.doi.org/10.1039/c6ra01437b.

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BEA zeolite is modified using phenoldisulfonic acid to change catalyst characteristics, which helps to form a single cyclic product. A new term called volume space acidity (VSA) provides volume space available for dioxane to dioxalane rearrangement.

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Ji, Yangyuan, Matthew J. Tao, Lamar O. Mair, et al. "Degradation of 1,4-Dioxane by Au/TiO2 Janus Nanoparticles Under Ultraviolet Light: Experiments and Modeling." Water 17, no. 11 (2025): 1708. https://doi.org/10.3390/w17111708.

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Advanced oxidation processes (AOPs) show significant promise to degrade recalcitrant water contaminants, such as 1,4-dioxane, but slow degradation kinetics limit the energy efficiency of this technology. We realized substantial enhancements in the degradation of 1,4-dioxane (a suspected carcinogen) using gold-coated titanium dioxide (Au/TiO2) Janus nanoparticles (JNPs) irradiated with above-bandgap ultraviolet (UV) light (peak wavelength, 254 nm). To explain this result, we combined experimental measurements quantifying 1,4-dioxane degradation at varying UV wavelengths with finite-element simu

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Kuhn, Norbert, Ahmed Al Sheikh, and Manfred Steimann. "Synthesis and Structure of a Zwitterionic Imidazolium 1,3-Dioxanide." Zeitschrift für Naturforschung B 58, no. 8 (2003): 817–19. http://dx.doi.org/10.1515/znb-2003-0818.

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{Bis(methylthio)methylene}-2,2-dimethyl-4,6-dioxo-1,3- dioxane (7) reacts with cis-1,2-diamino-1,2-dicyanoethene to give 2,2-dimethyl-4,6-dioxo-5-{2-(4,5-dicyano)} imidazolio-1,3-dioxan-5-yl-imidazolium ylide (8) as a stable crystalline solid in good yield. The crystal structure of 8 × C3H6OS is discussed.

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Han, J. S., M. H. So, and C. G. Kim. "Optimization of biological wastewater treatment conditions for 1,4-dioxane decomposition in polyester manufacturing processes." Water Science and Technology 59, no. 5 (2009): 995–1002. http://dx.doi.org/10.2166/wst.2009.079.

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The solvent stabilizer 1,4-dioxane could have harmful effects on an ecosystem. The discharge limit of 1,4-dioxane in a body of water will be regulated at 5 mg/L in Republic of Korea. Thus, the currently operating activated sludge used in the manufacture of polyester should be properly treated to meet the regulations. Accordingly, the removal rate of 1,4-dioxane and its microbial properties was assessed at K, H and T corporations. The highest removal efficiencies were recorded at H. However, the concentration of 1,4-dioxane in the effluent of T exceeded the criterion. In addition, a microbial d

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Wang, Quyuan, Runtian He, Jing Xu, and Fangming Jin. "Removal of 1,4-Dioxane from Wastewater by Copper Oxide Catalyzed WAO with Mild Condition." E3S Web of Conferences 233 (2021): 01131. http://dx.doi.org/10.1051/e3sconf/202123301131.

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1,4-Dioxane is a contaminant of emerging concern that is classified by the U.S. Environmental Protection Agency as a likely human carcinogen. Moreover, 1,4-dioxane easily migrates to groundwater due to its high solubility in water and hard to be biodegraded or removed by traditional water treatment technology. Therefore, it is indispensable to develop new methods and technologies to dispose of 1,4-dioxane in the wastewater. Herein, this study presented catalytic wet air oxidation (CWAO) with CuO as a catalyst and O2 as an oxidant to treat 1,4-dioxane and investigated the influence of reaction

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Black, Roderick E., Fred J. Hurley, and Donald C. Havery. "Occurrence of 1,4-Dioxane in Cosmetic Raw Materials and Finished Cosmetic Products." Journal of AOAC INTERNATIONAL 84, no. 3 (2001): 666–70. http://dx.doi.org/10.1093/jaoac/84.3.666.

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Abstract Surveys of cosmetic raw materials and finished products for the presence of the carcinogen 1,4-dioxane have been conducted by the U.S. Food and Drug Administration since 1979. Analytical methods are described for the determination of 1,4-dioxane in ethoxylated cosmetic raw materials and cosmetic finished products. 1,4-Dioxane was isolated by azeotropic atmospheric distillation and determined by gas chromatography using n-butanol as an internal standard. A solid-phase extraction procedure based on a previously published method for the determination of 1,4-dioxane in cosmetic finished p

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Nakamiya, Kunichika, Syunji Hashimoto, Hiroyasu Ito, John S. Edmonds, and Masatoshi Morita. "Degradation of 1,4-Dioxane and Cyclic Ethers by an Isolated Fungus." Applied and Environmental Microbiology 71, no. 3 (2005): 1254–58. http://dx.doi.org/10.1128/aem.71.3.1254-1258.2005.

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ABSTRACT By using 1,4-dioxane as the sole source of carbon, a 1,4-dioxane-degrading microorganism was isolated from soil. The fungus, termed strain A, was able to utilize 1,4-dioxane and many kinds of cyclic ethers as the sole source of carbon and was identified as Cordyceps sinensis from its 18S rRNA gene sequence. Ethylene glycol was identified as a degradation product of 1,4-dioxane by the use of deuterated 1,4-dioxane-d 8 and gas chromatography-mass spectrometry analysis. A degradation pathway involving ethylene glycol, glycolic acid, and oxalic acid was proposed, followed by incorporation

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N., K. Soni, K. Singh Arvind, Srivastava Tanu, Chandra Prakash, and Pandey Niti. "Group-contribution method for the estimation of surface tension of binary liquid mixtures." Journal of Indian Chemical Society Vol. 86, Jan 2009 (2009): 28–31. https://doi.org/10.5281/zenodo.5807053.

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Department of Chemistry, University of Allahabad, Allahabad-211 002, Uttar Pradesh, India <em>E-mail </em>: drsoni_nk@rediffmail.com Department of Chemistry, Kamala Nehru Institute of Science (Awadh University, Faizabad), Sultanpur-228 118, Uttar Pradesh, India <em>Manuscript received 10 May 2007, revised 8 October 2007, accepted 28 May 2008</em> Corresponding-states group-contributions method (CSGC), for the first time, has been extended to estimate surface tension of five binary liquid mixtures namely, 1,4-dioxane + hexane, 1,4-dioxane + heptane, 1,4-dioxane + octane, 1,4-dioxane + nonane, 1

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Wahyuningsih, Tutik Dwi, and Yehezkiel Steven Kurniawan. "Synthesis of Dioxo-Dioxane and Dioxo-Dioxepane Ethyl Oleate Derivatives as Bio-Lubricant Base Stocks." Indonesian Journal of Chemistry 20, no. 3 (2020): 503. http://dx.doi.org/10.22146/ijc.42317.

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In this study, two novel compounds, i.e., ethyl 8-(3-octyl-5,6-dioxo-1,4-dioxan-2-yl)octanoate and ethyl 8-(3-octyl-5,7-dioxo-1,4-dioxepan-2-yl)octanoate were prepared from oleic acid as the starting material. Both compounds were obtained from the esterification of the ethyl 9,10-dihydroxyoctadecanoate with dicarboxylic acids in the presence of p-toluenesulfonic acid as a catalyst. The chemical structures of the synthesized products were confirmed by FTIR, 1H-NMR, and MS spectrometers. The bio-lubricant properties of the products, such as density, total acid number, total base number, and iodi

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Tian, Gui-Peng, Qian-Yuan Wu, Ang Li, Wen-Long Wang, and Hong-Ying Hu. "Promoted ozonation for the decomposition of 1,4-dioxane by activated carbon." Water Supply 17, no. 2 (2016): 613–20. http://dx.doi.org/10.2166/ws.2016.071.

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Worldwide attention has been attracted to 1,4-dioxane because of its probable human carcinogenicity and frequent occurrence in surface waters and wastewaters. Thus, many countries and organizations have set limits for the amount of this material in drinking water and wastewater effluent. However, the removal of 1,4-dioxane during traditional treatment processes, even ozonation (pH &lt; 7), has been limited. Therefore, 1,4-dioxane removal during catalytic ozonation was investigated in this study, and activated carbon was selected as the ideal catalyst. The removal efficiency of 1,4-dioxane

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Sales, Christopher M., Ariel Grostern, Juanito V. Parales, Rebecca E. Parales, and Lisa Alvarez-Cohen. "Oxidation of the Cyclic Ethers 1,4-Dioxane and Tetrahydrofuran by a Monooxygenase in Two Pseudonocardia Species." Applied and Environmental Microbiology 79, no. 24 (2013): 7702–8. http://dx.doi.org/10.1128/aem.02418-13.

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ABSTRACTThe bacteriumPseudonocardia dioxanivoransCB1190 grows on the cyclic ethers 1,4-dioxane (dioxane) and tetrahydrofuran (THF) as sole carbon and energy sources. Prior transcriptional studies indicated that an annotated THF monooxygenase (THF MO) gene cluster,thmADBC, located on a plasmid in CB1190 is upregulated during growth on dioxane. In this work, transcriptional analysis demonstrates that upregulation ofthmADBCoccurs during growth on the dioxane metabolite β-hydroxyethoxyacetic acid (HEAA) and on THF. Comparison of the transcriptomes of CB1190 grown on THF and succinate (an intermedi

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Rattanit, Mantiya, Ladawan Kusanthia, Pavin Sethbhakdi, and Peerapong Pornwongthong. "Occurrence of 1,4-dioxane in domestic wastewater and processed water: A case study of Thailand’s central plain." E3S Web of Conferences 610 (2025): 04005. https://doi.org/10.1051/e3sconf/202561004005.

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1,4-Dioxane is an emerging water contaminant and probable human carcinogen. Its use in various applications and improper waste management can lead to water contamination. This study surveyed 1,4-dioxane contamination in domestic wastewater and water from Thailand’s central plain. Samples of influent, effluent, and activated sludge from seven domestic wastewater treatment plants, as well as tap water from 28 public water systems, were collected and analyzed for 1,4-dioxane. The results showed 1,4-dioxane presence in all wastewater samples, with concentrations ranging from 4.34 to 1285.44 μg/L a

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M.S., METWALLY, ABDEL RAZIK A., F. EL-HADI M., and A. EL-WARDANY M. "Resin-catalysed Hydrolysis of Ethyl Formate Dioxane-Water Medium." Journal of Indian Chemical Society Vol. 71, Sep 1994 (1994): 557–60. https://doi.org/10.5281/zenodo.5896248.

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Departmcnt of Chemistry, Faculty of Science, Al-Azhar University, Cairo, Egypt Department of Chemistry, Faculty of Science, Cairo University, Giza, Egypt <em>Manuscript received 25 June 1991, accepted 29 July 1993</em> Kinetics of the reaction between a newly synthesised sulphonated cation exchange resin and ethyl formate solution have been studied in dioxane-water mixtures of varying compositions of dioxane (0-45%, v/v) at different temperatures (20-40°). The order of the reaction in the heterogeneous catalysis by the resin was found to be the same as in the homogeneous catalysis by a dis

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Kim, Myung-Chan, Su-Yeon Park, Hyo-Rim Kim, et al. "Application of Response Surface Method for Determination of Optimized Conditions for Quantification of 1,4-Dioxane in Model System of Polyethylene Glycol 200." Separations 10, no. 9 (2023): 495. http://dx.doi.org/10.3390/separations10090495.

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The release of 1,4-dioxane probably contributes to the deterioration of marine habitats, animal health, and human liver and kidneys. The formulation of 1,4-dioxane in glycols, which has been applied for dehumidifying agents in refineries, may need to be replaced to ensurepublic health. Further, it is necessary to identify and precisely determine the levels of 1,4-dioxane in glycols for food quality control and environmental safety regulation. The objectives of this study were to validate a liquid–liquid extraction (LLE) method for 1,4-dioxane analysis and to optimize the LLE conditions using a

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Al-Sheikh, Ahmad, Kamal Sweidan, Cäcilia Maichle-Mößmer, Manfred Steimann, and Norbert Kuhn. "Synthesis and Reactions of 5-[Amino(thiomethyl)methylene]- 2,2-dimethyl-1,3-dioxane-4,6-dione." Zeitschrift für Naturforschung B 64, no. 1 (2009): 101–5. http://dx.doi.org/10.1515/znb-2009-0113.

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5-[Amino(thiomethyl)methylene]-2,2-dimethyl-1,3-dioxane-4,6-dione (4) is obtained from 5-[bis- (thiomethyl)methylene]-2,2-dimethyl-1,3-dioxane-4,6-dione (1) and aqueous ammonia in excellent yield. Its reaction with m-chloroperbenzoic acid gives the sulfoxide derivative 5-[amino(sulfinylmethyl) methylene]-2,2-dimethyl-1,3-dioxane-4,6-dione (5). With triphenylphosphine, 5 reacts to give triphenyl( thiomethyl)phosphonium 5-cyano-2,2-dimethyl-1,3-dioxane-4,6-dionate (6) from which the methyltriphenylphosphonium salt 6a is obtained with excess triphenylphosphine. The crystal structures of 4, 5 and

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So, M. H., J. S. Han, T. H. Han, J. W. Seo, and C. G. Kim. "Decomposition of 1,4-dioxane by photo-Fenton oxidation coupled with activated sludge in a polyester manufacturing process." Water Science and Technology 59, no. 5 (2009): 1003–9. http://dx.doi.org/10.2166/wst.2009.056.

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The cyclic ether 1,4-dioxane is a synthetic industrial chemical that is used as a solvent in producing paints and lacquers. The EPA and the International Agency for Research on Cancer(IARC) classified 1,4-dioxane as a GROUP B2(probable human) carcinogen. 1,4-dioxane is also produced as a by-product during the manufacture of polyester. In this research, a polyester manufacturing company (i.e. K Co.) in Gumi, Korea was investigated regarding the release of high concentrations of 1,4-dioxane (about 600 mg/L) and whether treatment prior to release should occur to meet with the level of the regulat

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Lee, Kang Hoon, Imtiaz Afzal Khan, Muhammad Ali Inam, Rizwan Khan, Young Min Wie, and Ick Tae Yeom. "Efficacy of Continuous Flow Reactors for Biological Treatment of 1,4-Dioxane Contaminated Textile Wastewater Using a Mixed Culture." Fermentation 8, no. 4 (2022): 143. http://dx.doi.org/10.3390/fermentation8040143.

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The goal of this study was to evaluate the biodegradation of 1,4–dioxane using a mixed biological culture grown in textile wastewater sludge with 1,4–dioxane as the sole carbon source. The conditions for the long-term evaluation of 1,4–dioxane degradation were determined and optimized by batch scale analysis. Moreover, Monod’s model was used to determine the biomass decay rate and unknown parameters. The soluble chemical oxygen demand (sCOD) was used to determine the concentration of 1,4–dioxane in the batch test, and gas chromatography/mass spectrometry (GC/MS) was used to measure the concent

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42

Aizawa, Hideki. "Morphology of polysorbate 80 (Tween 80) micelles in aqueous 1,4-dioxane solutions." Journal of Applied Crystallography 42, no. 4 (2009): 592–96. http://dx.doi.org/10.1107/s002188980902295x.

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The structures of micelles of the surfactant polysorbate 80 (Tween 80) in 0–50% aqueous 1,4-dioxane solutions (pH 7.2, ionic strength 2.44 mM) were investigated by means of small-angle X-ray scattering. At 1,4-dioxane concentrations of 0–20%, core–shell cylindrical micelles formed because the crown-shaped polysorbate 80 molecules aggregated into a cylindrical layer of four chains entangled with one another through intra- and intermolecular interactions. At 30–40% 1,4-dioxane, core–shell discus micelles formed, and at 50% 1,4-dioxane, core–shell elliptic discus micelles formed by the same mecha

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Reháková, Mária, and Anna Sopková. "Clathrates of tetracyanonickelates containing 1,4-dioxane." Collection of Czechoslovak Chemical Communications 52, no. 12 (1987): 2890–99. http://dx.doi.org/10.1135/cccc19872890.

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It was found after study of modifications of tetracyano complexes with 1,4-dioxane that a similar product is formed also by direct addition of 1,4-dioxane to a solution of [Ni(NH3)m][Ni(CN)4] or to solid NiNi(CN)4.nH2O; and 1,4-dioxane is initially bonded as a guest molecule and then as a ligand. The amount of guest component or ligand in the compounds Ni(NH3)m(C4H8O2)aNi(CN)4.(y-a)C4H8O2.nH2O and Ni(C4H8O2)aNi(CN)4.(n-a)C4H8O2 depends on the preparation conditions and on the conditions of storage of the solid product after isolation. The results of TA, IR, and GC analysis confirmed the presen

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Otulakowski, Lukasz, Andrzej Dworak, Aleksander Forys, et al. "Micellization of Polystyrene-b-Polyglycidol in Dioxane and Water/Dioxane Solutions." Polymers 12, no. 1 (2020): 200. http://dx.doi.org/10.3390/polym12010200.

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In this work, the self-assembly of a series of amphiphilic polystyrene-b-polyglycidol (PS-b-PGL) diblock copolymers in dioxane and dioxane/water mixtures is presented. The PS-b-PGL have an average degree of polymerization (DP) of PS block equal to 29 units and varied degrees of polymerization for the glycidol segments with DPs of 13, 42, 69 and 117. In dioxane, amphiphilic diblock copolymers form micelles with the hydrophilic PGL placed in the core. Critical micelle concentration (CMC) was determined based on the intensity of scattered light vs. concentration. The micelle size was measured by

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Eaborn, C., A. Farook, P. B. Hitchcock та J. D. Smith. "catena-Poly[[(1,4-dioxane-O1)iodolithium]-μ-(1,4-dioxane-O1:O4)]". Acta Crystallographica Section C Crystal Structure Communications 53, № 10 (1997): 1387–88. http://dx.doi.org/10.1107/s0108270197008482.

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Wormald, C. J., and P. W. Johnson. "Quadrupole coupling in (carbon dioxide+dioxane)(g). The excess molar enthalpy and second virial cross-coefficient of (dioxane+carbon dioxide or propane)(g)." Journal of Chemical Thermodynamics 31, no. 8 (1999): 1085–91. http://dx.doi.org/10.1006/jcht.1999.0521.

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Protas, A. V., O. V. Mikolaichuk, E. A. Popova, et al. "Functionalized 1,3,5-triazine-derivatives as promising anticancer agents: synthesis and cytotoxic activity in vitro." Scientific Notes of the Pavlov University 31, no. 1 (2024): 55–61. http://dx.doi.org/10.24884/1607-4181-2024-31-1-55-61.

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Introduction. A promising area of application of 1,3,5-triazines in medical chemistry is the development of highly effective anticancer agents. It is noteworthy that a significant cytotoxic effect may occur with 2,4,6-substituted 1,3,5-triazine derivatives containing aziridine rings as substituents. These compounds interact with DNA molecules of tumor cells and they are alkylating agents.The objective was to synthesize and investigate the cytotoxic activity in vitro of new aziridine–containing 1,3,5-triazine derivatives against tumor cell lines of human lung adenocarcinoma A549 and human hepat

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Tanabe, Akiko, and Kuniaki Kawata. "Determination of 1,4-Dioxane in Household Detergents and Cleaners." Journal of AOAC INTERNATIONAL 91, no. 2 (2008): 439–44. http://dx.doi.org/10.1093/jaoac/91.2.439.

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Abstract A possible human carcinogen, 1,4-dioxane, was investigated as to its concentration levels in household detergents and cleaners currently sold in Japan. A solid-phase extraction combined with stable isotope dilution and gas chromatographic/ mass spectrometric determination was evaluated for the determination of 1,4-dioxane in household products. The evaluation of the method was performed using a recovery study of 1,4-dioxane-d8 from detergent and cleaner samples. The mean overall recovery and relative standard deviation were 78 and 15, respectively. The limit of quantitation was 0.05 m

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Zhang, Chang, Libin Zhang, and Yuanming Guo. "Transient Simulation of 1, 4-Dioxane Fate and Transport During Enhanced Soil Vapor Extraction Treatment." E3S Web of Conferences 350 (2022): 03011. http://dx.doi.org/10.1051/e3sconf/202235003011.

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1, 4-Dioxane is an emerging contaminant a that is fully miscible in water and resistant to biodegradation. The presence of 1, 4-Dioxane in vadose zone creates prolonged environmental issues and risk human health. To date, treatment technologies for 1, 4-Dioxane vadose zone remediation are still being developed. In this work, a numeric simulation tool was developed to investigate the fate and transport of 1, 4-Dioxane in the treatment zone of enhanced soil vapor extraction (XSVE) which utilizes heated air injection to improve contaminant removal efficacy. The results suggested identify source z

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Amber, S. Gad. "The effectiveness of cyclic ether biodegradation in groundwater and in soil." Chemistry Research Journal 4, no. 2 (2019): 40–45. https://doi.org/10.5281/zenodo.13369081.

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1,4-Dioxane was released into the air, water, and soil at production sites and was classified as a probable pollutant carcinogen. Its throwing limit could be controlled by low cost bioremediation substitutes to photocatalytic oxidation, volatilization and sorption.  1,4 dioxane cometabolic biodegradation process depends on using primary substrates as methane. Degradation of 1,4-dioxane and accompanied metabolites were demonstrated by GC-MS analysis.

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