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Statistical analysis of the joint inhibitory action of similar compounds
Authors:Thomas M. Gerig  Udo Blum  Kristen Meier
Affiliation:(1) Department of Statistics, North Carolina State University, 27695 Raleigh, North Carolina;(2) Department of Botany, North Carolina State University, 27695 Raleigh, North Carolina
Abstract:A statistical model is presented that characterizes the joint action of similar compounds when the response variable is continuous. The model allows for antagonistic and synergistic as well as similar joint (additive) action of compounds. It also allows for differential potencies in the compounds. A method of statistical analysis using nonlinear regression analysis is presented along with sample SAS code for carrying it out. An efficient experimental design is given in the form of a set of mixture combinations. Two generalizations of the model are discussed. An example is presented relating the joint action of ferulic and vanillic acids to the growth of cucumber seedlings.Paper No. 11878 of the Journal Series of the North Carolina Agricultural Research Service, Raleigh, North Carolina 27695-7601. The use of trade names in this publication does not imply endorsement by the North Carolina Agricultural Research Service of the product named, nor criticism of similar ones not mentioned. This research was partially supported by US-Spain Joint Committee for Scientific and Technological Cooperation project CCA-8309/166.
Keywords:Synergy  antagonism  similar joint action  mixture
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