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Quantification and Characterization of Volatiles Evolved During Extrusion of Rice and Soy FloursNASA Johnson Space Center is designing and building a habitat (Bioregenerative Planetary Life Support Systems Test Complex, BIO-Plex) intended for evaluating advanced life support systems developed for long duration missions to the Moon or Mars where all consumables will be recycled and reused. A food system based on raw products obtained from higher plants (such as soybeans, rice and wheat) may be a central feature of a biological ly-based Advanced Life Support System (ALSS). In order to convert raw crops to edible ingredients or food items, multipurpose processing equipment such as an extruder is ideal. Volatile compounds evolved during the manufacturing of these food products may accumulate reaching toxic levels. Additionally, off-odors often dissipated in open-air environments without consequence, may cause significant discomfort in the BIO-Plex. Rice and defatted soy flours were adjusted to 16% moisture and triplicate samples were extruded using a table top single-screw extruder. The extrudate was collected in specially designed Tedlar bags from which air samples could be extracted. The samples were analyzed by GC-MS with special emphasis on compounds with Spacecraft Maximum Allowable Concentrations (SMAC). Results showed a combination of alcohols, aldehydes, ketones and carbonyl compounds in the different flours. Each compound and its SMAC value as well as its impact on the air revitalization system was discussed.
Document ID
20000101072
Acquisition Source
Johnson Space Center
Document Type
Preprint (Draft being sent to journal)
Authors
Zasypkin, D.
(NASA Johnson Space Center Houston, TX United States)
Lertsiriyothin, W.
(NASA Johnson Space Center Houston, TX United States)
Lee, T. C.
(NASA Johnson Space Center Houston, TX United States)
Bourland, C. T.
(NASA Johnson Space Center Houston, TX United States)
Bond, Robert L.
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Subject Category
Man/System Technology And Life Support
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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