A GC-MS with electron impact ionization was used for the development of a speciation method for the simultaneous determination of monobutyl-, dibutyl-, and tributyltin in environmental samples (waters, sediments, and biota). The method is based on the use of a mixed spike containing Sn-enriched monobutyltin (MBT), dibutyltin (DBT), and tributyltin (TBT) for isotope dilution analysis. The mixed ...

The presence of phthalate esters (PAEs) in the environment has gained a considerable attention due to their potential impacts on public health. This study reports the first data on the occurrence of 15 PAEs in the water near the Mopanshan Reservoir-the new and important water source of Harbin city in Northeast China. As drinking water is a major source for human exposure to PAEs, the fate of ta...

High free-volume copolymers were prepared via polycondensation with 2,3,5,6,-tetrafluoroterephthalonitrile (TFTPN) in which a portion of the 3,3,3',3'-tetramethyl-1,1'-spirobisindane (TTSBI) of PIM-1 was replaced with dibutyl anthracene maleimide (4bIII). An investigation of free volume using positron annihilation lifetime spectroscopy (PALS), and gas permeation measurements was carried out for...

Hunter syndrome (mucopolysaccharidosis-II) is caused by deficiency of the lysosomal enzyme iduronate-2-sulfatase. The assay of this sulfatase requires the use of alpha-L-iduronate glycosides containing a sulfate at the 2-position. We report a simple, three-step procedure for the introduction of sulfate at the 2-position starting with the methyl ester of alpha-L-iduronate glycosides. The procedu...

In the title compound, C22H28N2, the dihedral angle between the planes of the phenyl ring and the di-hydro-quinazoline ring system (r.m.s. deviation = 0.030 Å) is 24.95 (7)° and both n-butane chains assume all-trans conformations. In the crystal, N-H⋯N hydrogen bonds link the mol-ecules into C(4) chains propagating in the [001] direction.

activity in liver homogenate from di-2-ethylhexyl phthalate (DEHP)-treated rats. Ohyama9) showed in vitro that PAEs inhibited mitochondrial respiration, with di-n-butyl phthalte (DBP) showing the strongest effect, and he concluded that PAEs were inhibitors of electron and energy transfer systems but not uncouplers. Takahashi10) also found inhibitory effects of PAEs on respiration in vitro and a...

We evaluated, by confocal laser scanning microscopy, the actin cytoskeleton of immortalized rat Py1a osteoblasts treated with phthalate esters (butyl benzyl phthalate, BBP and dibutyl phthalate, DBP), endocrine disruptors with estrogenic activity. We observed some peculiar modifications of actin cytoskeleton and cells changing from a spindle shape to a rounded form. In particular, F-actin forme...

Experimental vapor pressures, vaporization, fusion and sublimation enthalpies of a number of dialkyl benzenedicarboxylates have been examined by correlation gas chromatography (CGC) experiments in order to identify a series of experimental measurements that appear to be internally self-consistent. The compounds studied in this regard include dimethyl phthalate dimethyl terephthalate, dimethyl i...