1H NMR spectroscopy Anti-fungal activity 1 Anti-microbial activity 1 Aspergillus 1 Aspergillus flavus 1 Fermentation 1 Fermentation process 1 Food preservatives 1 Food products 1 Fungi 1 Low-molecular-weight peptides 1 Microorganisms 1 Mixtures 1 Molecular weight 1 Natural preservatives 1 Nuclear magnetic resonance spectroscopy 1 Optimum conditions 1 PKC 1 Palm oil 1 Peptides 1 Sustainable 1