Showing 1-30 of 34 results for "551368"
Direct functionalization of tetrahydrofuran and 1,4-dioxane: nickel-catalyzed oxidative C(sp3)-H arylation.
Dong Liu et al.
Angewandte Chemie (International ed. in English), 52(16), 4453-4456 (2013-03-21)
Carlos E Agudelo-Morales et al.
Chemphyschem : a European journal of chemical physics and physical chemistry, 13(18), 4195-4201 (2012-10-24)
The quenching of pyrene and 1-methylpyrene fluorescence by nitroanilines (NAs), such as 2-, 3-, and 4-nitroaniline (2-NA, 3-NA, and 4-NA, respectively), 4-methyl-3-nitroaniline (4-M-3-NA), 2-methyl-4-nitroaniline (2-M-4-NA), and 4-methyl-3,5-dinitroaniline (4-M-3,5-DNA), are studied in toluene and 1,4-dioxane. Steady-state fluorescence data show the higher...
Health evaluation of 1,4-dioxane.
C T DeRosa et al.
Toxicology and industrial health, 12(1), 1-43 (1996-01-01)
Rodrigo Abonia et al.
European journal of medicinal chemistry, 57, 29-40 (2012-10-10)
Novel quinoline-2-one based chalcones were synthesized from a Claisen-Schmidt condensation by using the couple KOH/1,4-dioxane as reaction medium. A relatively stable aldol was isolated and identified as the intermediate species in the formation of the target chalcones. Nine of the...
Anita Toulmin et al.
Journal of medicinal chemistry, 51(13), 3720-3730 (2008-06-19)
Partition coefficients were measured for 47 compounds in the hexadecane/water ( P hxd) and 1-octanol/water ( P oct) systems. Some types of hydrogen bond acceptor presented by these compounds to the partitioning systems are not well represented in the literature...
Kiyoaki Ishimoto et al.
Biomacromolecules, 13(11), 3757-3768 (2012-09-19)
For developing broader application of biobased polymers, graft copolymers and comb polymers having poly(lactic acid) (PLA) side chains have been synthesized by using a macromonomer technique. PLA macromonomers (MMm) having a methacryloyl polymerizable group with different PLA chain length with...
Ia I Korenman et al.
Sudebno-meditsinskaia ekspertiza, 55(6), 38-41 (2013-02-15)
The results of extraction of 6-mercaptopurine and azathioprine from aqueous saline solutions with organic solvents of different chemical nature and their mixtures are presented. Synergism between the distribution coefficients was demonstrated during the extraction of the above compounds with 1,4-dioxane...
R Dario Arrua et al.
Journal of chromatography. A, 1273, 26-33 (2013-01-01)
Rigid monolithic cryostructures were prepared in capillary format at sub-zero temperatures and used successfully in the separation of proteins by hydrophobic interaction chromatography (HIC). The polymerization mixture consisted of poly(ethyleneglycol) diacrylate (PEGDA) M(n)∼258 as the single monomer, a mixture of...
Abdullah M Asiri et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 95, 679-684 (2012-05-18)
The absorption and fluorescence characteristics of 4-(p-N,N-dimethyl-aminophenylmethylene)-2-phenyl-5-oxazolone (DPO) have been investigated in different solvents. DPO dye exhibits a large red shift in both absorption and emission spectra as solvent polarity increases, indicating a large change in the dipole moment of...
Iñaki Galve et al.
Molecular diversity, 16(4), 639-649 (2012-10-12)
A practical protocol was developed for the synthesis of 2-arylamino substituted 4-amino-5,6-dihydropyrido[2,3-d]pyrimidin-7(8H)-ones from α,β-unsaturated esters, malononitrile, and an aryl substituted guanidine via the corresponding 3-aryl-3,4,5,6- tetrahydropyrido[2,3-d]pyrimidin-7(8H)-ones. Such compounds are formed upon treatment of 2-methoxy-6-oxo-1,4,5,6-tetrahydropyridine-3-carbonitriles with an aryl substituted guanidine in...
B Thanuja et al.
Ultrasonics sonochemistry, 19(6), 1213-1220 (2012-04-14)
Density (ρ), ultrasonic velocity (U), for the binary mixtures of 4-methoxy benzoin (4MB) with ethanol, chloroform, acetonitrile, benzene, and di-oxane were measured at 298K. The solute-solvent interactions and the effect of the polarity of the solvent on the type of...
V K Shormanov et al.
Sudebno-meditsinskaia ekspertiza, 55(3), 37-41 (2012-08-11)
The optimal conditions for the isolation of esfenvalerate from the biological specimens have been determined. It was shown that this compound can be separated from the endogenous component of a biological material by means of liquid-liquid extraction and chromatography on...
1,4-Dioxane.
IARC monographs on the evaluation of carcinogenic risks to humans, 71 Pt 2, 589-602 (1999-09-07)
Elisabeth Eckert et al.
Journal of chromatography. B, Analytical technologies in the biomedical and life sciences, 935, 80-84 (2013-08-21)
An analytical method for the determination of β-hydroxyethoxyacetic acid (HEAA), the main urinary metabolite of 1,4-dioxane was developed and validated. The presented method involves liquid-liquid extraction of HEAA from the urine samples, followed by silylation and subsequent analytical separation and...
Sobhi M Gomha et al.
Molecules (Basel, Switzerland), 17(8), 9335-9347 (2012-08-07)
Successful implementation of ultrasound irradiation for the rapid synthesis of a novel series of 3-[1-(4-substituted-5-(aryldiazenyl)thiazol-2-yl)hydrazono)ethyl]-2H-chromen-2-ones 5a-h, via reactions of 2-(1-(2-oxo-2H-chromen-3-yl)ethylidene) thiosemicarbazide (2) and the hydrazonoyl halides 3(4), was demonstrated. Also, a new series of 5-arylidene-2-(2-(1-(2-oxo-2H-chromen-3-yl)ethylidene)hydrazinyl)thiazol-4(5H)-ones 10a-d were synthesized from reaction...
Kyle T Greenway et al.
The Journal of organic chemistry, 77(20), 9221-9226 (2012-10-03)
Hyperconjugation underlies many chemical phenomena of fundamental and practical importance. Owing to a great deal of interest in the anomeric effect, anomeric-like hyperconjugative effects have been thoroughly investigated in oxygen-containing systems. However, such interactions in the second- and third-row chalcogens...
Daniel Gerrity et al.
Water research, 46(19), 6257-6272 (2012-10-16)
The performance of ozonation in wastewater depends on water quality and the ability to form hydroxyl radicals (·OH) to meet disinfection or contaminant transformation objectives. Since there are no on-line methods to assess ozone and ·OH exposure in wastewater, many...
Ilaria Massarelli et al.
European journal of medicinal chemistry, 44(9), 3658-3664 (2009-03-11)
A dataset comprising 55 chemicals with hepatocarcinogenic potency indices was collected from the Carcinogenic Potency Database with the aim of developing QSAR models enabling prediction of the above unwanted property for New Chemical Entities. The dataset was rationally split into...
Kathrin Dennerlein et al.
Toxicology in vitro : an international journal published in association with BIBRA, 27(2), 708-713 (2012-12-12)
According to international guidelines skin penetration experiments can be carried out using freshly excised or frozen stored skin. However, this recommendation refers to data obtained in experiments with human cadaver skin. In our study, the percutaneous penetration of the occupationally...
Alkene trifluoromethylation coupled with C-C bond formation: construction of trifluoromethylated carbocycles and heterocycles.
Hiromichi Egami et al.
Angewandte Chemie (International ed. in English), 52(14), 4000-4003 (2013-02-27)
Hisako Masuda et al.
Journal of molecular microbiology and biotechnology, 22(5), 312-316 (2012-11-14)
1,4-Dioxane is an important groundwater contaminant. Pseudonocardia sp. strain ENV478 degrades 1,4-dioxane via cometabolism after the growth on tetrahydrofuran (THF) and other carbon sources. Here, we have identified a THF monooxygenase (thm) in ENV478. The thm genes are transcribed constitutively...
O N Makshakova et al.
Bioorganicheskaia khimiia, 38(3), 300-305 (2012-09-25)
Our interest in modifying influence of the low-molecular organic compounds on the hydration shell of biopolymers is due to a well-known fact that the former can act as regulators of the enzymatic activity changed the hydration shell of the latter....
Naoyuki Kishimoto et al.
Water research, 47(5), 1919-1927 (2013-02-09)
This paper reports on the reusability and the optimal reuse of iron-rich sludge for an electrochemical Fenton-type process using sequencing batch mode and separation batch mode reuse models. In the sequencing batch mode, processes of electrochemical treatment, neutralization, sedimentation, and...
Megha Aggarwal et al.
PloS one, 7(12), e51288-e51288 (2012-12-20)
The nucleocapsid core interaction with endodomains of glycoproteins plays a critical role in the alphavirus life cycle that is essential to virus budding. Recent cryo-electron microscopy (cryo-EM) studies provide structural insights into key interactions between capsid protein (CP) and trans-membrane...
Christof Aellig et al.
ChemSusChem, 5(9), 1737-1742 (2012-07-05)
The dehydration of D-fructose to 5-hydroxymethylfurfural was studied under single-phase conditions in the low boiling solvent 1,4-dioxane at moderate temperatures in the presence of the solid acid-catalyst Amberlyst-15. The reaction was first examined and optimized under batch conditions, where it...
Sheau-Yun Dora Chiang et al.
Journal of environmental monitoring : JEM, 14(9), 2317-2326 (2012-07-25)
An intrinsic biodegradation study involving the design and implementation of innovative environmental diagnostic tools was conducted to evaluate whether monitored natural attenuation (MNA) could be considered as part of the remedial strategy to treat an aerobic aquifer contaminated with 1,4-dioxane...
Shaily Mahendra et al.
Chemosphere, 91(1), 88-92 (2012-12-15)
1,4-Dioxane (dioxane), a probable human carcinogen, is used as a solvent stabilizer for 1,1,1-trichloroethane (TCA) and other chlorinated solvents. Consequently, TCA and its abiotic breakdown product 1,1-dichloroethene (DCE) are common co-contaminants of dioxane in groundwater. The aerobic degradation of dioxane...
Richard H Anderson et al.
Integrated environmental assessment and management, 8(4), 731-737 (2012-04-12)
Increasing regulatory attention to 1,4-dioxane has prompted the United States Air Force (USAF) to evaluate potential environmental liabilities, primarily associated with legacy contamination, at an enterprise scale. Although accurately quantifying environmental liability is operationally difficult given limited historic environmental monitoring...
Imran Ali et al.
Methods in molecular biology (Clifton, N.J.), 970, 127-135 (2013-01-04)
Immobilized polysaccharide chiral stationary phases (CSPs) are a new development in chiral chromatography with increasing importance for the resolution of racemic compounds. These CSPs can be used with solvents traditionally applied for the classical coated polysaccharide CSPs as well as...
Javier Fernández-Lodeiro et al.
Inorganic chemistry, 52(1), 121-129 (2012-12-13)
Two novel fluorescent probes bearing a single (P) and two (a podand-like structure, L) pyrene units derived from 1,5-bis(2-aminophenoxy)-3-oxopentane have been synthesized and investigated in dioxane using UV-vis absorption, and steady-state and time-resolved (in a picosecond time scale) emission spectroscopy;...

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