Abstract The dielectric paper of power transformers is subjected to ageing caused by high temperatures and chemical reactions in the oil. electromagnetic forces that affect conductor can cause breakage even end useful life transformer. To improve understanding those phenomena, a continuously transposed with four layers (plain Kraft crepe papers) was impregnated naphthenic oil aged during differ...

The recent study by O’Reilly et al. [1] describing the identification of 197 esters likely related to the biodegradation of petroleum hydrocarbons in 61 groundwater samples from 10 fuel release sites in California lacks evidence that these compounds have a “low toxicological profile,” which is the argument used by the authors to promote the routine use of silica gel cleanup. The detection ofmor...

Recent analytical advances have provided evidence that groundwater affected by oil sands process-affected water (OSPW) is reaching the Athabasca River at one location. To understand and discriminate toxicological risks posed OSPW-influenced relative to groundwaters associated with natural deposits, these highly complex mixtures of soluble organics were subjected characterization through effects...

Mineral oils (also known as base oils, mineral base oils or lubricant base oils) are chemical substances prepared from naturally occurring crude petroleum oil. Crude oil is distilled first at atmospheric pressure and then under high vacuum to yield vacuum distillates and residual fractions that can be further refined to mineral oils. Mineral oils refined from petroleum crude oils are complex an...