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.
1 File size â WAV files are large. 2  A stereo, CD quality recording (44.1khz, 16-bit), works out at 10.09 MB per minute. 3  Moving up to 48kHz 24-bit stereo (which will improve both the frequency range and the available dynamic range) will increase file size to 16.48 MB per minute.