Solubilities of some polycyclic aromatic hydrocarbons (PAHs) in supercritical carbon dioxide were measured with a procedure based on a direct on-line combination of a saturation cell to a flame ionization detector. Acenaphthene, anthrance and chrysene were selected as the test solutes. A method was developed and evaluated which enables the measurement of the contribution of solute vapor pressur...

A Rhodococcus sp. isolated from contaminated river sediment was investigated to determine if the isolate could degrade high molecular mass polycyclic aromatic hydrocarbons. The Rhodococcus sp. was able to utilize anthracene (53%), phenanthrene (31%), pyrene (13%), and fluoranthene (5%) as sole source of carbon and energy, but not naphthalene or chrysene. In a study of the degradation of anthrac...

Several naphthalene and anthracene degrading bacteria were isolated from rhizosphere of Populus deltoides, which were growing in non-contaminated soil. Among these, four isolates, i.e. Kurthia sp., Micrococcus varians, Deinococcus radiodurans and Bacillus circulans utilized chrysene, benzene, toluene and xylene, in addition to anthracene and naphthalene. Kurthia sp and B. circulans showed posit...

K-region epoxides of benz[a] anthracene, dibenz[a,h] anthracene, and 3-methylcholanthrene have been found to be toxic and more active in producing malignant transformation of cells derived from mouse prostate than their respective parent hydrocarbons and K-region dihydrodiols and phenols. The data support the view that metabolism of these polycyclic hydrocarbons is a prerequisite for their biol...

HE yeast Saccharomyces cerevisiae normally alternates between haploT phase and diplophase, propagating vegetatively primarily as a diploid (WINCE 1935). SUBRAMANIAM and coworkers ( SUBRAMANIAM and KRISHNA MURTHY 1949; MITRA and SUBRAMANIAM 1949 ; SUBRAMANIAM 1951) have reported the production of tetraploids by the exposure of diploid yeast to acenaphthene and chrysene. Their data lack any genet...

Triphenylamine (TPA)-functionalized magnetic microspheres (Fe(3)O(4)/SiO(2)/TPA) were prepared and applied as solid phase extraction (SPE) adsorbents for the analysis of polycyclic aromatic hydrocarbons (PAHs) in environmental samples in combination with high-performance liquid chromatography (HPLC). The magnetic solid-phase extraction (MSPE) conditions affecting the extraction efficiency were ...

The ability of Lactobacillus acidophilus LA-5, Bifidobacterium lactis BB-12, delbrueckii subsp. bulgaricus PTCC 1737 and Streptococcus thermophilus 1738 in removing Benzo(a)pyrene (BaP), Benz(a)anthracene (BaA), Chrysene (Chr) Benzo(b)fluoranthene (BbF) from contaminated aqueous solution with respect to strain types, time temperature incubation was studied. results showed that BaA, Chr, BbF BaP...

Two subvalent, redox-active diborane(4) anions, [3]4? and [3]2?, carrying exceptionally high negative charge densities are reported: Reduction of 9-methoxy-9-borafluorene with Li granules without stirring leads to the crystallization B(sp3)?B(sp2) diborane(5) anion salt Li[5]. [5]? contains a 2,2?-biphenyldiyl-bridged B?B core, chelating 2,2?-biphenyldiyl moiety, MeO substituent. Li[5] Na metal...