The reason hard boiled eggs dont last as long as raw eggs is that in cooking the eggs, a natural protective chemical layer (produced by the mother hen) is washed off the porous eggshell, allowing germs to enter. Source(s): http://cookery.newarchaeology.com/how_lo... sugarice82 Â· 9 years ago.
Freebase(0.00 / 0 votes)Rate this definition: Song cycle. A song cycle is a group of songs designed to be performed in a sequence as a single entity. As a rule, all of the songs are by the same composer and often use words from the same poet or lyricist.
The cardiac cycle refers to a complete heartbeat from its generation to the beginning of the next beat, and so includes the diastole, the systole, and the intervening pause. The frequency of the cardiac cycle is described by the heart rate, which is typically expressed as beats per minute. Each beat of the heart involves five major stages. The first two stages, often considered together as the ventricular filling stage, involve the movement of blood from the atria into the ventricles.