Fig. 5
From: Comparative analysis of microbial contamination in diesel fuels using MALDI-TOF MS
Correlation analysis of the presence (a) and occurrence of specific bacterial species (b) with the physicochemical parameters of fuels. (a) Pearson correlation coefficient values for the presence of bacteria with various physicochemical parameters, with positive correlations shown by red bars and negative correlations by blue bars. The significance level was set at 0.05 and is indicated on the graph: as ** (p-values < 0.01), * (p-values < 0.05). (b) Statistically significant Pearson correlation coefficient values for specific bacterial species with physicochemical parameters. The colour gradient correlates with the value of the correlation coefficient. (CI) Cetane Index, (FP) Flash Point, (CFPP) Cold Filter Plugging Point, FAME (Fatty Acid Methyl Esters), (Cont) Contaminants, (S) sulfur content.
