Hybrid Effect on the Properties of Dent Corn Starch Acetates
2002
Genetic diversity in corn (maize) has contributed to variability in corn processing
characteristics. Differences in acetylated dent corn starch pasting properties and reaction
efficiencies due to hybrid were assessed. Nine dent corn hybrids grown during 1998 and eight dent
corn hybrids grown during 1999 were wet milled in the laboratory. Starch from each hybrid was
modified using a laboratory scale acetylation procedure. NaOH consumed and reaction time were
recorded for each reaction. A Rapid Visco Analyzer (RVA) was used to measure starch pasting
properties. Acetyl content was measured by a spectrophotometric method, from which reaction
efficiency was calculated. Differences in peak, trough, final and setback viscosities and pasting
temperature were found among 1998 hybrids. Differences in trough, breakdown and final viscosities
were found among 1999 hybrids.
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