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 Change Import Using to WAV Encoder. 2  Then click to change Setting to Custom and a new window will open. 3  In the Custom window, change the Sample Rate to 44.1 kHz and Sample Size to 16 bit. 4  Make sure Channels says Stereo and Stereo Mode says Normal. 5  Then continue clicking OK until you are back to your iTunes library.