title: Storage stability of screwpress-extracted oils and residual meals from CELSS candidate oilseed crops.
abstract: The efficacy of using screwpress extraction for oil was studied with three Controlled Ecological Life-Support System (CELSS) candidate oilseed crops (soybean, peanut, and canola), since use of volatile organic solvents for oil extraction likely would be impractical in a closed system. Low oil yields from initial work indicated that a modification of the process is necessary to increase extraction efficiency. The extracted oil from each crop was tested for stability and sensory characteristics. When stored at 23 degrees C, canola oil and meal were least stable to oxidative rancidity, whereas peanut oil and meal were least stable to hydrolytic rancidity. When stored at 65 degrees C, soybean oil and canola meal were least stable to oxidative rancidity, whereas peanut oil and meal were least stable to hydrolytic rancidity. Sensory evaluation of the extracted oils used in bread and salad dressing indicated that flavor, odor intensity, acceptability, and overall preference may be of concern for screwpress-extracted canola oil when it is used in an unrefined form. Overall results with screwpress-extracted crude oils indicated that soybean oil may be more stable and acceptable than canola or peanut under typical storage conditions.
authors.affiliation: Department of Food Science, Purdue University, West Lafayette, IN 47907-1160, USA.
authors.forename: S D
authors.initials: SD
authors.lastname: Stephens
authors.forename: B A
authors.initials: BA
authors.lastname: Watkins
authors.forename: S S
authors.initials: SS
authors.lastname: Nielsen
mesh_terms: D010367:Arachis / Q000737:chemistry; D001937:Brassica / Q000737:chemistry; D018504:Ecological Systems, Closed; D005230:Fatty Acids, Nonesterified / Q000032:analysis; D005511:Food Handling / Q000379:methods*; D005518:Food Preferences; D005519:Food Preservation; D008021:Life Support Systems; D008054:Lipid Peroxides / Q000032:analysis; D010938:Plant Oils / Q000032:analysis / Q000737:chemistry* / Q000302:isolation & purification*; D012903:Smell; D013024:Soybean Oil / Q000032:analysis / Q000737:chemistry / Q000302:isolation & purification; D013649:Taste; D013696:Temperature; D014810:Vitamin E / Q000032:analysis
chemical_list: D005230:Fatty Acids, Nonesterified; D008054:Lipid Peroxides; D010938:Plant Oils; D014810:Vitamin E; D013024:Soybean Oil