Journal Article Purification of Four Esterases from Aspergillus niger NRRL 337 Get access Mieko Iwai, Mieko Iwai Osaka Municipal Technical Research Institute, Osaka 536, Japan Search for other works by this author on: Oxford Academic Google Scholar Susumu Okumura, Susumu Okumura Osaka Municipal Technical Research Institute, Osaka 536, Japan Search for other works by this author on: Oxford Academic Google Scholar Elizabeth L De Leal, Elizabeth L De Leal National University of Colombia, Bogotá, Colombia Search for other works by this author on: Oxford Academic Google Scholar Yoshio Tsujisaka Yoshio Tsujisaka Osaka Municipal Technical Research Institute, Osaka 536, Japan Search for other works by this author on: Oxford Academic Google Scholar Agricultural and Biological Chemistry, Volume 47, Issue 8, 1 August 1983, Pages 1865–1868, https://doi.org/10.1080/00021369.1983.10865862 Published: 01 August 1983 Article history Received: 09 February 1983 Published: 01 August 1983