title: [Construction of Three-Dimensional Isobologram for Ternary Pollutant Mixtures].
abstract: Tongji University, Shanghai 200092, China) Isobolographic analysis was widely used in the interaction assessment of binary mixtures. However, how to construct a three-dimensional (3D) isobologram for the assessment of toxicity interaction within ternary mixtures is still not reported up to date. The main purpose of this paper is to develop a 3D isobologram where the relative concentrations of three components are acted as three coordinate axes in 3D space to examine the toxicity interaction within ternary mixtures. Taking six commonly used pesticides in China, including three herbicides (2, 4-D, desmetryne and simetryn) and three insecticides ( dimethoate, imidacloprid and propoxur) as the mixture components, the uniform design ray procedure (UD-Ray) was used to rationally design the concentration composition of various components in the ternary mixtures so that effectively and comprehensively reflected the variety of actual environmental concentrations. The luminescent inhibition toxicities of single pesticides and their ternary mixtures to Vibrio fischeri at various concentration levels were determined by the microplate toxicity analysis. Selecting concentration addition (CA) as the addition reference, 3D isobolograms were constructed to study the toxicity interactions of various ternary mixtures. The results showed that the 3D isobologram could clearly and directly exhibit the toxicity interactions of ternary mixtures, and extend the use of isobolographic analysis into the ternary mixtures.
mesh_terms: D015084:2,4-Dichlorophenoxyacetic Acid; D002681:China; D004117:Dimethoate; D004785:Environmental Pollutants / Q000633:toxicity*; D015386:Hazardous Substances; D006540:Herbicides / Q000633:toxicity*; D007093:Imidazoles; D007306:Insecticides; D000073943:Neonicotinoids; D009574:Nitro Compounds; D010575:Pesticides / Q000633:toxicity*; D001074:Propoxur; D018675:Toxicity Tests / Q000379:methods*; D014227:Triazines
chemical_list: D004785:Environmental Pollutants; D015386:Hazardous Substances; D006540:Herbicides; D007093:Imidazoles; D007306:Insecticides; D000073943:Neonicotinoids; D009574:Nitro Compounds; D010575:Pesticides; D014227:Triazines; C033807:simetryn; D015084:2,4-Dichlorophenoxyacetic Acid; C009232:semeron; C082359:imidacloprid; D001074:Propoxur; D004117:Dimethoate