Short interspersed nuclear elements (SINEs), such as Alu, spread by retrotransposition, which requires their transcripts to be copied into DNA and then inserted into new chromosomal sites. This can ...

The test and calibration of audio-frequency circuits and systems often require a sine wave with an accurate amplitude and frequency and a low total harmonic distortion (THD). Some test applications ...

LONDON, Dec 5 (Reuters) - Portuguese oil company Galp Energia began testing a new diesel producing unit this week at its 220,000 barrel per day Sines refinery near Lisbon and aims to start production ...