Ricerc@Sapienza

The 2016-2018 ongoing revision of the lEC 60156 'Insulating liquids - Determination of the breakdown voltage at power frequency' was just approved and the revised standard will be published by the end of 2018. This document will include the recommended use of a stirring system with the main purpose to reduce the scatter in the ac breakdown voltage results.

A comprehensive study on essential oils (EOs) extracted from different Calamintha nepeta
(L.) Savi subsp. glandulosa (Req.) Ball (CG) samples from Tarquinia (Italy) is reported. In this study,
the 24-hour steam distillation procedure for EO preparation, in terms of different harvesting and
extraction times, was applied. The GC/MS analysis showed that CG essential oils from Tarquinia
(TEOCG) belong to pulegone-rich chemotype. The analysis of 44 samples revealed that along