SACs are those genes with expression up-regulated during leaf senescence. Class I SACs are expressed only during senescence (senescence-specific). Class II SAGs have a basal level of expression during early leaf development, but this level increases during senescence.
Which Sample Rate to use. 44.1 kHz. 44.1 kHz (44100 Hz) is the sampling rate of audio CDs giving a 20 kHz maximum frequency. 20 kHz is the highest frequency generally audible by humans, so making 44.1 kHz the logical choice for most audio material.
60 X 245 X 3 = 44.1 KHz. In 50 Hz video, there are 37 lines of blanking, leaving 588 active lines per frame, or 294 per field, so the same sampling rate is given by. 50 X 294 X3 = 44.1 Khz. The sampling rate of 44.1 KHz came to be that of the Compact Disc.Even though CD has no video circuitry, the equipment used to make CD masters is video based and determines the sampling rate.0 X 245 X 3 = 44.1 KHz. In 50 Hz video, there are 37 lines of blanking, leaving 588 active lines per frame, or 294 per field, so the same sampling rate is given by. 50 X 294 X3 = 44.1 Khz. The sampling rate of 44.1 KHz came to be that of the Compact Disc.