The benzene ring of the title compound, C(13)H(12)N(2)O(6), is twisted away from the planes of the amino-methyl-ene unit and the dioxane ring by 30.13 (4) and 35.89 (4)°, respectively. The dioxane ring exhibits a half-boat conformation, in which the C atom between the dioxane O atoms is 0.553 (8) Å out-of-plane. An intra-molecular N-H⋯O hydrogen bond stabilizes the conformation of the dioxane r...

The downstream separation of 1,3-propanediol from dilute aqueous solution was studied. A process combining reversible reaction of 1, 3-propanediol with acetaldehyde to 2-methyl-1,3-dioxane and a simultaneous extraction of the product by organic solvent appears to be technically feasible and attractive. The dioxane yield was 91-92%, the overall conversion of 1,3-propanediol was ca. 98%, and reco...

Microbes capable of degrading pollutant such as 1,4-dioxane were selected from the seawater samples of four coastal areas of Okinawa located in the most southern islands of Japan using the developed method and a seawater-charcoal perfusion apparatus. Specifically, aerobic culture in the apparatus led to the selection of candidate 1,4-dioxane degraders. Among these, strain RM-31 and KY-3 exhibit...

In the title compound, C(22)H(14)O(2)S(3), the dioxane ring is disordered over two sites [site occupancies = 0.623 (3) and 0.377 (3)]; both components adopt half-chair conformations. The two benzothio-phene ring systems are asymmetrically twisted away from the attached thio-phene ring [dihedral angles = 20.57 (3) and 6.70 (3)°] and are oriented at an angle of 26.83 (3)°. No significant hydrogen...

Graphene-based materials have emerged as new potential adsorbents for the adsorption and removal of persistent pollutants, and they could play a key role in the remediation of 1,4-dioxane. In this framework, a quantum chemistry study was carried out to rationalize the sorption properties of oxidized graphene (GO) and Si-doped graphene (SiG) nanosheets for use in 1,4-dioxane removal, taking into...

From e.m.f measurements of cells (C-1) and (C-2) it has been established that modified Davies equation is valid in dioxane-water media at least upto 30% dioxane by weight. E0m values Hg | Hg2Cl2(s), Cl- electrode having 10, 20 weight the corresponding thermodynamic parameters have determined 288.15, 298.15, 308.15 318.15 0K. (Pt),H2 ( l atm ) HCl(m1) x% Dioxane (100-x)% H2O, Hg2Cl2(s) … BaCl2(m...

The title compound, C(14)H(14)O(2), crystallizes in the chiral monoclinic space group P2(1). This acetal is composed of a planar naphthalene ring with a 1,3-dioxane ring substituent, which has a chair conformation. In the crystal structure, symmetry-related mol-ecules are connected via a weak C-H⋯O inter-action to form a helical chain propagating in [010]. While there are no π-π stacking inter-...

The bacterium Pseudonocardia dioxanivorans CB1190 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 ...

Three-step extraction of lignin fractions from ball-milled sugarcane bagasse (SCB) was studied with 96% dioxane, 50% dioxane, and 80% dioxane containing 1% NaOH at boiling temperature followed by purification to remove hemicelluloses. The total yields of hemicelluloses and lignin were 15.8% and 7.2% based on dried SCB, respectively. In the first step, 5.1% lignin (70.8% of the total extracted l...

This study used integrated omics technologies to investigate the potential novel pathways and enzymes for 1,4-dioxane degradation by a consortium enriched from activated sludge of domestic wastewater treatment plant. An unclassified genus belonging Xanthobacteraceae increased significantly after magnetic nanoparticle-mediated isolation degraders. Species with relatively higher abundance (> 0.3%...