Examples of devices that accept both 802.3af and Cisco power: Examples of devices that only accept 802.3af power: The presence of a gigabit Ethernet port on a powered device is a clear indicator that the device is 802.3af only. Because of the relative newness of PoE+, few devices require this level of power.
BHT or butyl hydroxytoluene is a fat soluble synthetic compound which is commonly used to preserve foods and cosmetics to slow down the autoxidation rate of ingredients in a product that can cause changes in the taste or colour.
A substance is matter which has a specific composition and specific properties. Every pure element is a substance. Every pure compound is a substance. Examples of substances: Iron is an element and hence is also a substance. Methane is a compound and hence is also a substance.Examples of non-substances: Salt water is not a substance.It is a mixture of two substances-sodium chloride and water. Its composition and therefore its properties are not fixed.Gasoline is not a substance.xamples of non-substances: Salt water is not a substance. It is a mixture of two substances-sodium chloride and water. Its composition and therefore its properties are not fixed. Gasoline is not a substance.