... ethylisovalerate and ethylhexenoate The yeasts such as Hansenula anomala, Candida utilis and Pichia anomala also produce esters during fermentation Since these esters are very volatile their aroma can ... fruity flavoured aromas and are formed by the condensation of an alcohol with an acid Bacteria such as Lactobacillus, Lactococcus and Pseudomonas produce esters such as ethylacetate, ethylbutyrate, ... the claim and evaluate it's potency © National Centre for Biotechnology Education / Society for General Microbiology Practical Fermentation 1999 Student Guide: Practical Fermentation Investigation...