Several methods are known for the detection of traces of solvents in oil or paraffin. A gravimetric method (3) and a rapid colorimetrie method for the determination of residual solvents (4) are not sensitive enough. The same is true for the method developed by Eisdorf er &,Mehlenbacher (5) for the detenninatipn of trichloroethylene in plant oils after extraction with xylene. Rather sensitive de...

The induction of paraffin oxidation in intact cells of Pseudomonas aeruginosa was investigated. Oxidation of (14)C-heptane by cell-free extracts of adapted cells showed that the activity of whole cells is a reliable reflection of the synthesis of the first enzyme in the degradation of n-alkanes. Induction was significantly affected by glucose and could be completely repressed by malate. The ami...

The influence of heat transfer characteristics fluids filled with paraffin core-metallic shell nanoencapsulated phase change material (PCM) on photothermal conversion and storage in a volumetrically heated solar system is numerically analysed. results show that paraffin/Al, paraffin/Au, paraffin/Ag, paraffin/Cu enhance the energy by 68, 73, 92 86 %, respectively as compared water-based Al, Au, ...

The approach of mechanism generation is the accepted one of assigning generic rates to reactions in the same class. The procedure has been successfully applied to higher paraffins that include detailed sub-models of n-hexane, cyclohexane, n-heptane, n-decane, n-dodecane, and n-hexadecane and semi-detailed submodels of iso-octane and methyl cyclohexane, in addition to reactions of aromatic forma...

Liquid paraYn or mineral oil is a transparent, colourless, odourless, or almost odourless, oily liquid composed of saturated hydrocarbons obtained from petroleum. Petroleum was used as a medicine at least 400 years before Christ. The earliest internal use of refined petroleum appears to date back to 1872, when Robert A. Chesebrough was granted a patent for the manufacture of “a new and useful p...

in this study, the hepatoprotective effect of the methanol extract of aerial parts (shoot) from otostegia persica boiss (golder) was investigated against the carbon tetrachloride (ccl4)-induced acute hepatotoxicity in male rats. liver damage was induced through the oral administration of 50% ccl4 in liquid paraffin (2.5 ml/kg bw, per os) 60 min after the administration of the methanol extract o...