Webster Dictionary(0.00 / 0 votes)Rate this definition: a black pigment found in the pigment-bearing cells of the skin (particularly in the skin of the negro), in the epithelial cells of the external layer of the retina (then called fuscin), in the outer layer of the choroid, and elsewhere. Origin: [Gr.
The best oil for the wok is rice oil (because of its high smoke point, 490Â°F, 254Â°C). Peanut oil is not bad either and more commonly used. It is not healthy to heat any oil too far, so it's best to add the oil very shortly before adding products to the wok so the products can cool the oil during the stir frying.
The Viscosity Index (VI) is an indication of the oilâs change in viscosity with a change in temperature. Most gas and steam turbine OEMs require a turbine oil with a VI of at least 90, which is met by most turbine oil suppliers.The VI for turbine oils should not vary in-service, because turbine oils typically do not contain VI improvers and therefore do not need to be tested routinely.he Viscosity Index (VI) is an indication of the oilâs change in viscosity with a change in temperature. Most gas and steam turbine OEMs require a turbine oil with a VI of at least 90, which is met by most turbine oil suppliers.