Journal
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
Volume 13, Issue 4, Pages 5207-5229Publisher
MDPI
DOI: 10.3390/ijms13045207
Keywords
oils compounds; antimicrobial effect; bacteria and fungi species; probability distribution function; quantitative structure-activity relationship (QSAR); multiple linear regression (MLR)
Funding
- European Social Fund, Human Resources Development Operational Program [89/1.5/62371]
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A contingency of observed antimicrobial activities measured for several compounds vs. a series of bacteria was analyzed. A factor analysis revealed the existence of a certain probability distribution function of the antimicrobial activity. A quantitative structure-activity relationship analysis for the overall antimicrobial ability was conducted using the population statistics associated with identified probability distribution function. The antimicrobial activity proved to follow the Poisson distribution if just one factor varies (such as chemical compound or bacteria). The Poisson parameter estimating antimicrobial effect, giving both mean and variance of the antimicrobial activity, was used to develop structure-activity models describing the effect of compounds on bacteria and fungi species. Two approaches were employed to obtain the models, and for every approach, a model was selected, further investigated and found to be statistically significant. The best predictive model for antimicrobial effect on bacteria and fungi species was identified using graphical representation of observed vs. calculated values as well as several predictive power parameters.
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