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Nonconventional Yeasts and Bacteria

183 bytes added, 01:01, 7 February 2018
update to Debaryomyces and hops
[[File:D hansenii.jpg|thumb|Debaryomyces hansenii; photo by [http://www.gettyimages.co.uk/detail/photo/debaryomyces-hanseni-yeast-high-res-stock-photography/128615807].]]
''Debaryomyces'' is a genus of yeast commonly referred to as a spoilage yeast <ref>[https://en.wikipedia.org/wiki/Debaryomyces Wikipedia. Debaryomyces. Retrieved 09/03/2015.]</ref>. The non-pathogenic species ''D. hansenii'' is commonly found in cheese and is an osmotolerant, halotolerant, and xerotolerant (tolerant high amounts of salt and sugar, and low amounts of water) <ref>[https://en.wikipedia.org/wiki/Debaryomyces_hansenii Wikipedia. Debaryomyces hansenii. Retrieved 09/03/2015.]</ref>. Debaryomyces are associated with natural fermentation, and tend to develop during the maturation of beer <ref name="Brewlab_debaryomyces">[https://www.brewlab.co.uk/news/the-original-flag-porter-story "The Original Flag Porter Story". Brewlab website. 01/20/2017. Retrieved 12/08/2017.]</ref>. Many species of ''Debaryomyces'' have been to biotransform monoterpenes found in hop oils (see [[Hops#Hop_Derived_Compounds_In_Beer_and_Biotransformations|Hop Biotransformations]]).
Recently it was found living cells of a ''Debaryomyces'' species in a [https://www.brewlab.co.uk/news/the-original-flag-porter-story bottle of porter] found in a shipwreck under the English Channel that was dated to 1825. It is currently unknown how this yeast might have affected the flavor of the historical porter, but the characterization of this yeast is underway by Brewlab in the UK <ref name="Brewlab_debaryomyces" />.

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