A university student in Northern England is the first to fall prey to the Student Slasher in this intricately constructed, stand-alone novel of suspense and revenge, originally published in the U.K. as Caedmon's Song.
Nitrogen is essential to life on Earth. It is a component of all proteins and it can be found in all living systems. Nitrogen compounds are present in organic materials, foods, fertilizers, explosives and poisons. Nitrogen is crucial to life, but in excess it can also be harmful to the environment.
Nitrogen is an essential part of amino acids and nucleic acids both of which are essential to all life. Specific bacteria (e.g. Rhizobium trifolium) possess nitrogenase enzymes which can fix atmospheric nitrogen (see nitrogen fixation) into a form (ammonium ion) which is chemically useful to higher organisms.