The Prehistory of Jazz. The Africanization of American Music. An elderly black man sits astride a large cylindrical drum. Using his fingers and the edge of his hand, he jabs repeatedly at the drum head--which is around a foot in diameter and probably made from an animal skin--evoking a throbbing pulsation with rapid, sharp strokes.
nope, efficiency o fa machine cannot be greater than 100%...theoretically it shows sometime that efficiency of a machine can be 100%, but practically it cannot be possible as â¦ there is some loss of energy is always involved in different ways. Answer   In order for a machine to be 100% efficient, the amount of energy going into it has to be precisely equal to the energy the machine is putting out-with nothing lost.
and 3. high amplification efficiency (90-105%) you can calculate the amplification efficiency (E) from the slope of your standard curve using the following formula: E = 10^(-1/slope) or E is converted to percentage by E = (10^(-1/slope)-1)*100, in your case (10^(-1/-3.81)-1)*100 = 83%. this is the amount of pcr product increase after each cycle. an ideal reaction reaches an efficiency close to 100%. you should strive for an reaction efficiency of 90-105%.