heterocyclic compound — Any of a class of organic compounds whose molecules contain one or more rings of atoms with at least one atom (the heteroatom) being an element other than carbon, most frequently oxygen, nitrogen, or sulfur. As in regular cyclic hydrocarbons,… … Universalium
Organic base — Acids and Bases Acid dissociation constant Acid base extraction Acid–base reaction Acid–base titration Dissociation constant Acidity function Buffer sol … Wikipedia
imidazole — A five membered heterocyclic compound occurring in l histidine and other biologically important compounds. i. alkaloids alkaloids containing one or more i. moieties as part of its structure ( E.G., pilocarpine). * * * im·id·az·ole .im ə daz .ōl n … Medical dictionary
Biochemistry — For the journal, see Biochemistry (journal). Biological Chemistry redirects here. For the journal formerly named Biological Chemistry Hoppe Seyler, see Biological Chemistry (journal). Biochemistry, sometimes called biological chemistry, is the… … Wikipedia
LSm — s.The Sm proteins were first discovered as antigens in a patient with a form of systemic lupus erythematosus (SLE), a debilitating autoimmune disease. They were named Sm proteins in honor of this patient, Stephanie Smith. Other proteins with very … Wikipedia
C4H5N — pyrrol pyr rol, pyrrole pyr role, n. [Gr. ? flame colored (from ? fire) + L. oleum oil.] (Chem.) A nitrogenous heterocyclic base found in coal tar, bone oil, and other distillates of organic substances, and also produced synthetically as a… … The Collaborative International Dictionary of English
pyrrol — pyr rol, pyrrole pyr role, n. [Gr. ? flame colored (from ? fire) + L. oleum oil.] (Chem.) A nitrogenous heterocyclic base found in coal tar, bone oil, and other distillates of organic substances, and also produced synthetically as a colorless… … The Collaborative International Dictionary of English
pyrrole — pyrrol pyr rol, pyrrole pyr role, n. [Gr. ? flame colored (from ? fire) + L. oleum oil.] (Chem.) A nitrogenous heterocyclic base found in coal tar, bone oil, and other distillates of organic substances, and also produced synthetically as a… … The Collaborative International Dictionary of English
imidazole — noun Etymology: International Scientific Vocabulary Date: 1892 a white crystalline heterocyclic base C3H4N2 that is an antimetabolite related to histidine; broadly any of various derivatives of this … New Collegiate Dictionary
piperazine — noun Etymology: International Scientific Vocabulary piperidine + azine Date: 1889 a crystalline heterocyclic base C4H10N2 used especially as an anthelmintic … New Collegiate Dictionary