Columbia Encyclopedia

Search results

500 results found

indicators, acid-base

(Encyclopedia)indicators, acid-base, organic compounds that, in aqueous solution, exhibit color changes indicative of the acidity or basicity of the solution. Common indicators include p-nitrophenol, which is color...

cis-butenedioic acid

(Encyclopedia)cis-butenedioic acid sĭs-byo͞oˌtēndīˈōĭk [key], IUPAC name for maleic acid; see fumaric acid. ...

para-aminobenzoic acid

(Encyclopedia)para-aminobenzoic acid pârˈə-əmēˈnōbĕnzōĭk [key]: see vitamin. ...

methotrexate

(Encyclopedia)methotrexate, drug used in halting the growth of actively proliferating tissues. Introduced in the 1950s, it is used in the treatment of leukemia, psoriasis, and non-Hodgkin's lymphoma. By binding to ...

pyrimidine

(Encyclopedia)CE5 Pyrimidines found in deoxyribonucleic acid (DNA) pyrimidine pīrĭmˈĭdēnˌ [key], type of organic base found in certain coenzymes and in the nucleic acids of plant and animal tissue. The th...

Browse by Subject