Mineral oil derived from petroleum is the most preferred liquid insulation and coolant in power and Oven Door Switch distribution transformers because of its stability at high temperatures, as well as its excellent electrical insulating properties.Since it is non-biodegradable and inflammable, an alternative insulating liquid should be developed, o

The Tanjero Formation is the Upper Cretaceous (Campanian-Maastrichtian) crops out in northeastern Iraq at the High-Folded and Imbricate Zones.To study heavy minerals, twenty sandstone samples were obtained from selected sites of the Tanjero Formation exposed at the southwestern limb of the Surdash anticline in the northeast part of Sulaimanyia city