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Nonconventional Yeasts and Bacteria

748 bytes added, 07:32, 3 August 2017
Pichia Apotheca
====''Pichia Apotheca''====
''Pichia Apoteca'' is a new genus of ''Pichia'' which was identified in 2017. <ref name="pichia a">[http://www.biorxiv.org/content/biorxiv/early/2017/06/15/150722.full.pdf . Identification of Pichia Apotheca. Authors: Caiti Smukowski Heil, Joshua N. Burton, Ivan Liachko, Anne Friedrich, Noah A. Hanson, Cody L. Morris, Joseph Schacherer, Jay Shendure, James H. Thomas, Maitreya J. Dunham. 2017.]</ref> ''Pichia A'' was identified as a hybrid of ''Pichia Membranifaciens'' and another unidentified species of ''Pichia''.  =====Characterization===== During the identification a fermentation using solely ''Pichia A'' was conducted. The test wort used was at 13.75 Plato and after 5 weeks at 13.61 Plato. The alcohol by weight was found to be 0.02% after fermentation. In addition to this, percentages based on the entire contents of the wort showed that over five weeks, glucose levels dropped from 1.62% to 1.22%. The hybrid may incrementally breakdown maltotriose and fructose, dropping from 1.46% to 1.05% and 0.57% to 0.22% respectively, but did not appear to be able to reduce the levels of maltose. These results indicate that the ''Pichia'' hybrid did not significantly metabolize much of the available carbohydrates into alcohol within this wort environment.
===''Debaryomyces ''===
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