Authors: Shu Wen Situ, Edward PC Lai.
Lactic acid bacteria (LAB) are commonly used in food preservation due to their ability to produce lactic acid around which pathogenic bacteria do not thrive. With cost-efficient production of LAB, new research on their agricultural applications is reported at an increasing rate. Transition metal oxide nanoparticles are demonstrated to display antimicrobial activity in this report. However, LAB is able to proliferate in the presence of magnesium oxide nanoparticles at concentrations from 0.25 to 1.0 mg/ml. In comparison, Lactobacillus acidophilus probiotic (LAP) displayed significantly less colony growth when exposed to TMONPs. Furthermore, 4-chlorophenol is a harmful environmental contaminant and priority pollutant and LAB growth decreased slightly with increasing concentration of 4-chlorophenol. Interestingly, the toxicity of 4-chlorophenol to LAB growth was ameliorated in the presence of MgO nanoparticles.
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