Fractions can be collected automatically by means of fraction collectors. We can also write negative fractions, which represent the opposite of a positive fraction. The numerator and denominator of a reduced fraction are coprime. These materials represent a significant fraction of petroleum. Quinolines are present in small amounts in crude oil within the virgin diesel fraction. It is used to treat heart failure with reduced ejection fraction. Measures of relative difference are unitless numbers expressed as a fraction. Only an exponentially small fraction of the residues survive. Other tests measure the antioxidant capacity of a fraction. Pyrolysis oil is another type of fuel derived from the lignocellulosic fraction of biomass. Perennial crops have larger below ground biomass fraction, which increases the SOC content. There is no limit on the number of decimal places for the decimal fraction. They constitute most of the gamma globulin fraction of the blood proteins. Together these parties represented only a small fraction of the population. In neighborhoods with the smallest fraction white, the premium is about 0.6%.