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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 biologically based Advanced Life Support System. 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 and reach 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 tabletop 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 (SMACs). 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
Document Type
Reprint (Version printed in journal)
External Source(s)
Vodovotz, Y. (NASA Johnson Space Center Houston TX United States)
Zasypkin, D.
Lertsiriyothin, W.
Lee, T. C.
Bourland, C. T.
Date Acquired
August 22, 2013
Publication Date
March 1, 2000
Publication Information
Publication: Biotechnology progress
Volume: 16
Issue: 2
ISSN: 8756-7938
Subject Category
Life Sciences (General)
Distribution Limits
Non-NASA Center
NASA Program Advanced Human Support Technology
NASA Discipline Life Support Systems