Title page for ETD etd-08312004-151935

Type of Document Master's Thesis
Author Hodson, Emily
URN etd-08312004-151935
Title Effects of Capture and Return on Chardonnay (Vitis vinifera L.) Fermentation Volatiles.
Degree Master of Science
Department Food Science and Technology
Advisory Committee
Advisor Name Title
Zoecklein, Bruce W. Committee Chair
Duncan, Susan E. Committee Member
O'Keefe, Sean F. Committee Member
  • aroma/flavor trapping
  • white wine
  • capture and return
  • fermentation volatiles
Date of Defense 2004-02-24
Availability unrestricted
Effectiveness of a capture and return system for the partial retention of fermentation volatiles, as a means of improving white wine quality, was evaluated. Twenty-three aroma-active volatiles including ethyl esters, acetate esters, fusel alcohols, and fatty acids, were quantified using head-space solid phase microextraction with GC/MS. Volatile analysis of fermentations maintained at 15°C demonstrated a trend of increased concentrations of ethanol, esters and ethyl esters of fatty acids and decreased concentrations of fusel alcohol acetates, fatty acids and higher alcohols in treatment wines. When fermentation temperature was maintained at 30°C there was increased concentration and retention of fusel alcohols, fatty acids and higher alcohols compared to 15°C. Sensory analysis of wines fermented at 15°C, using triangle difference testing, indicated variable differences in aroma among treatments.

  Filename       Size       Approximate Download Time (Hours:Minutes:Seconds) 
 28.8 Modem   56K Modem   ISDN (64 Kb)   ISDN (128 Kb)   Higher-speed Access 
  CaptureandReturnBackMatter.pdf 218.56 Kb 00:01:00 00:00:31 00:00:27 00:00:13 00:00:01
  CaptureandReturnBodyMatter.pdf 240.07 Kb 00:01:06 00:00:34 00:00:30 00:00:15 00:00:01
  CaptureandReturnFrontMatter.pdf 102.81 Kb 00:00:28 00:00:14 00:00:12 00:00:06 < 00:00:01

Browse All Available ETDs by ( Author | Department )

dla home
etds imagebase journals news ereserve special collections
virgnia tech home contact dla university libraries

If you have questions or technical problems, please Contact DLA.