Nutrition Chapter 5 Flashcards Quizlet

  • corn germ oil at room temperature primary
  • corn germ oil at room temperature primary
  • corn germ oil at room temperature primary
  • corn germ oil at room temperature primary

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  • How to extract oil from corn germ during flour processing?
  • This work aimed the recovery of oil and protein fractions from corn germ (CG) generated as a by-product during flour processing. Several oil extraction techniques were investigated: hexane at room temperature, hexane at 45 °C, supercritical carbon dioxide (Sc-CO 2) and Soxhlet with hexane and ethanol.
  • Does Tempering degerming reduce endosperm fractions in corn germ-bran mixture?
  • The tempering-degerming process implemented to achieve the corn germ-bran mixture may let more endosperm fractions attached to the germ than the dry mechanical degerming and bran separation implemented by Castelmais. 3.2. Oil recovery and characterization Table 1 summarizes data of yields and oil composition for the different extraction methods.
  • Can oil and protein extracts be recovered from corn germ?
  • Oil and proteins were successfully recovered from corn germ by a biorefinery scheme. Oil extraction yield and TPC of oils were influenced by the polarity of solvents. The protein content of recovered extracts ranged from 20 to 48%. The functionality of protein extracts depended on the defatting pretreatment.
  • Does corn oil oxidate linoleic acyl groups?
  • The oil liquid matrix of several corn oil samples that have been stored at room temperature in closed receptacles for different periods of time is studied by means of 1 H nuclear magnetic resonance ( 1 H NMR), in order to further knowledge about this type of edible oil oxidation. As expected, the degradation of linoleic acyl groups predominates.
  • Does dry milling separate endosperm from corn germ?
  • Although the CG of these three studies were obtained by dry milling, they were not separated from endosperm in the same way. The tempering-degerming process implemented to achieve the corn germ-bran mixture may let more endosperm fractions attached to the germ than the dry mechanical degerming and bran separation implemented by Castelmais.
  • Why does corn oil oxidize during storage?
  • Corn oil can oxidize during storage and this provokes a decrease mainly in the concentration of unsaturated acyl groups, which are either fragmented to give compounds of lower molecular weight, or react with other acyl groups forming dimers, oligomers or polymers with different level of modifications in their chains.