1.Premium gas is pricier than regular gas. 2.Premium gas has higher octane ratings than regular gas. 3.Premium gas is ideal for the high-performance class and high-compression cars while regular gas is already good for most of the other regular to mid-class cars.4.Premium gas is believed by some to have more detergents (that serve to clean the engine) than regular gas.astly, some believe that premium gas has more detergent properties than regular gas. This means fewer residues left for premium gas users. However, it has also been discovered that most governments already regulate the required detergents in gasoline.
Lignin, a natural polymer found in wood, is a polyaromatic polyol that is readily available and relatively inexpensive. Lignin structure is dependent on wood species and processing conditions [2] . Commercially, lignin is obtained as a by-product of âwood freeâ papermaking.
Tunica media is broad and elastic with concentric fenestrated sheets of elastin, and collagen and only relatively few smooth muscle fibres. Tunica intima is made up of an epithelium, which is a single layer of flattened epithelial cells, together with a supporting layer of elastin rich collagen.hese arteries that receive blood directly from the heart-the aorta and the pulmonary artery.: These need to be elastic because: They are relatively thin compared to their diameter. When the heart contracts, and ejects blood into these arteries, the walls need to stretch to accommodate the blood surge, storing energy.