{"id":"https://openalex.org/keywords/optimal-ph","display_name":"pH optimum","description":"The pH optimum is the acidity or alkalinity at which an enzyme or other biological activity reaches its greatest measured rate.","display_name_alternatives":["optimum pH","optimal pH","pH optima"],"ids":{"openalex":"https://openalex.org/keywords/optimal-ph","wikidata":null},"primary_topic":{"id":"https://openalex.org/T11617","display_name":"Enzyme Production and Characterization","score":0.2061,"subfield":{"id":"https://openalex.org/subfields/1305","display_name":"Biotechnology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}},"topics":[{"id":"https://openalex.org/T11617","display_name":"Enzyme Production and Characterization","score":0.2061,"subfield":{"id":"https://openalex.org/subfields/1305","display_name":"Biotechnology"},"field":{"id":"https://openalex.org/fields/13","display_name":"Biochemistry, Genetics and Molecular Biology"},"domain":{"id":"https://openalex.org/domains/1","display_name":"Life Sciences"}}],"works_count":17960,"cited_by_count":389374,"works_api_url":"https://api.openalex.org/works?filter=keywords.id:keywords/optimal-ph","updated_date":"2026-10-22T04:07:25","created_date":"2026-09-30T00:00:00"}
