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Pathways of aerobic petroleum oil hydrocarbons biodegradation

100%

Kwapisz E.

2006

nr 2

166-188

The paper reviews the aspects of physiology and biochemistry of microbial biodegradation of the main components of petroleum oil: alkanes (larger than methane), alkenes, alkines, cyclic, polycyclic, aromatic and polyaromatic hydrocarbons. It focuses on aerobic degradation pathways. The review provides key information prepared on the basis of more than 30 years of research on microbial degradation of hydrocarbons. The areas discussed include new pathways of biodegradation of branched-chain alkanes, cyclic and polyaromatic hydrocarbons which have been discovered during the past few years. Special attention was paid to oxygenases ? enzymes initiating aerobic metabolism of hydrocarbons and phenomenon of co-oxidation which enables assimilation of most recalcitrant components of crude oil.

Porphyrins and phthalocyanines. Part. II. Porphyrins as biomimetic catalysts in organic compounds transformation

75%

Trytek M. , Fiedurek J. , Polska K. , Makarska M. , Radzki S.

nr 4

128-141

The interest in the use of metal porphyrins in biomimetic catalysis has been constantly increasing during the last twenty years, as the enzymology studies were showing the role of this complexes as prosthetic groups of cytochromes P-450, peroxidases and catalases. In particular, a number of research groups have focused their interest on the ability of metal porphyrins to catalyze redox processes on organic compounds under mild conditions, both for converting these compounds into more usuful products and for purifying industrial effluents. The aim of this review is to highlight the efforts of researchers in utilising metalloporphyrins for economically attractive processes. Interesting reactions are allylic hydroxylations of cheap and readily available precursor monoterpenes (like limonene, pinene) for potential production of valuable natural flavour and fragrance compounds, selective oxidation of alkyl chains of the alkanes, regioselective oxidation of cyclic hydrocarbons (eg. cycloheksan), steroids, as well as reduction of the halogenated alkanes.

Fatty acids, hydrocarbons and sterols in three plant species collected from Burullus Lake

63%

Haroon A. M. , El-Habibi A. M. , Szaniawska A.

Oceanological Studies

1995

nr 69/10

67-76

Three plant species belonging to Compositae, Chenopodiceae and Potamogetonaceae were collected from Burullus Lake.Hydrocarbon, sterol and fatty acid composition of each species were investigated and identified quantitatively using GLC technique.The result demonstrated that, the unasaponifiable matter of Inula erithmoides Halimione portulacoides and Potamogeton pectinatus was composed of, respectively 74.7% hydrocarbons and 25.3% sterol compounds; 73.6% hydrocarbons and 26.5% sterol compounds;100% hydrocarbons.Two sterols, namely cholesterol and stigmasterol, were detected in extracts of Inula erithmoides and Halimione portulacoides but at different concentrations.The analysis of saturated and unsaturated fatty acids indicated that the species studied differed in the number and concentration of fatty acids.