title: Critical micelle concentrations of allelopathic substances produced by Nannochloris oculata which affect a red tide organism, Gymnodinium breve.
abstract: Laboratory cultures of the green algae Nannochloris oculata and Nannochloris eucaryotum are known to cause lysis of Gymnodinium breve, which is Florida's red tide organism. Two cytolytic agents were previously identified as methyl palmitate and methyl stearate. In this study, the critical micelle concentrations of these substances were determined by ultraviolet light and turbidimetric methods to be 3.5 +/- 0.3 ppm (methyl stearate) and 4.3 +/- 0.6 (methyl palmitate). There were no significant differences in results obtained using the two methods.
authors.affiliation: Institute for Environmental Studies, Department of Chemistry, University of South Florida, Tampa 33620, USA.
authors.forename: E
authors.initials: E
authors.lastname: Pérez
authors.forename: D F
authors.initials: DF
authors.lastname: Martin
mesh_terms: D000818:Animals; D000460:Chlorophyta / Q000378:metabolism*; D003603:Cytotoxins / Q000737:chemistry*; D004141:Dinoflagellida / Q000187:drug effects*; D008823:Micelles; D009391:Nephelometry and Turbidimetry; D010168:Palmitates / Q000737:chemistry*; D013057:Spectrum Analysis; D013228:Stearates / Q000737:chemistry*; D013501:Surface-Active Agents / Q000737:chemistry*
chemical_list: D003603:Cytotoxins; D008823:Micelles; D010168:Palmitates; D013228:Stearates; D013501:Surface-Active Agents