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Tetrahydropyridine

339 bytes added, 15:41, 27 April 2018
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# Does the release of lysine from yeast autolysis when aging on trub increase THP potential (some say it does in wine and cider <ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/1852891514739054/ Tariq Ahmed of Revel Cider. Milk The Funk Facebook thread on THP in wines/ciders aged on lees. 10/16/2017.]</ref>)?
# Are other species of yeast such as wild ''S. cerevisiae'' capable of producing THP <ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/2069944559700414/ Zach Taggart. Milk The Funk Facebook group thread on other yeast species producing THP. 04/24/2018.]</ref>?
# Do sulfites bind to THP molecules, rendering them unperceivable <ref>[https://www.facebook.com/groups/MilkTheFunk/permalink/2069944559700414/?comment_id=2070023539692516&reply_comment_id=2074259392602264&comment_tracking=%7B%22tn%22%3A%22R%22%7D Otto Forsberg. Milk The Funk Post discussion on THP and sulfites. 04/27/2018.]</ref>?
 
<nowiki>*</nowiki> Due to the specialized GC/MS equipment needed for measuring forms of THP that most labs do not have, certain answers will be difficult to obtain. Some studies have used alkaline strips as a way to smell the aroma of THP, and while not as precise as the specialized GC/MS lab equipment, could still help further the understanding of THP. These strips were prepared in the following way: knowing that mousy off-flavour has a lingering sensory impact, the technique of alkaline paper strip assessment was adapted from Heresztyn (1986a). Paper strips (Whatman No. 1, 4–5 mm × 50 mm) were prepared by soaking in NaOH (0.1M) and drying overnight at room temperature. The alkaline paper strips were then briefly dipped into cell-free samples (centrifuged) and immediately assessed for the mouse-like odour by sniffing <ref>Private correspondence with Dr.
Paul Grbin by Dan Pixley. 11/2/2017.</ref>.

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