Definition of "nitrogen"

All life depends on nitrogen; it is the building block from which nature assembles amino acids, proteins, and nucleic acids; the genetic information that orders and perpetuates life is written in nitrogen ink.

2006, Michael Pollan, The Omnivore's Dilemma, The Penguin Press, page 42

Volatiles of kecap manis and its raw materials were extracted using Likens-Nickerson apparatus with diethyl ether as the extraction solvent. The extracts were then dried with anhydrous sodium sulfate, concentrated using a rotary evaporator followed by flushing using nitrogen until the volume was about 0.5 ml.

1997, A. J. Taylor, D. S. Mothram, editors, Flavour Science: Recent Developments‎, Elsevier, page 63