Effects of Storage Conditions on Consumer and Chemical Assessments of Raw ‘Nonpareil’ Almonds Over a Two-Year Period

Emily A. Pleasance, William L. Kerr, Ronald B. Pegg, Ruthann B. Swanson, Anna N. Cheely, Guangwei Huang, Daniel R. Parrish, Adrian Kerrihard

Research output: Contribution to journalArticleResearchpeer-review

2 Citations (Scopus)

Abstract

Abstract: Raw almonds are a major commodity, yet much is unknown about how storage conditions determine their shelf life. The storage stability, as measured by consumer assessments and chemical measures, of raw almonds was determined for samples stored in cardboard boxes and polypropylene packaging for 2 years at 4, 15, 25, and 35 °C, and at 50% and 65% relative humidity (RH). Samples stored in unlined cartons always failed (>25% rejection) before their counterparts stored in polypropylene bags under identical environmental conditions. Models determined that polypropylene packaging (as opposed to unlined cardboard cartons) extended the time until sample rejection by more than 7 months. Temperature and RH were both negatively associated with storage time until failure. Flavor was a greater contributor to consumer acceptability than texture or odor, while peroxide values and free fatty acids were of greater importance in predicting raw almond consumer quality than measures of conjugated dienes or 2-thiobarbituric acid-reactive substances. Practical Application: The results of this study will allow almond producers to determine packaging types and environmental storage conditions that provide shelf life of a specified time.

Original languageEnglish
Pages (from-to)822-830
Number of pages9
JournalJournal of Food Science
Volume83
Issue number3
DOIs
StatePublished - 1 Mar 2018

Fingerprint

almonds
storage conditions
Polypropylenes
polypropylenes
Product Packaging
packaging
cardboard
Humidity
shelf life
relative humidity
boxes (containers)
Thiobarbituric Acid Reactive Substances
thiobarbituric acid
Peroxides
peroxide value
Nonesterified Fatty Acids
products and commodities
thiobarbituric acid-reactive substances
sampling
bags

Keywords

  • almonds
  • consumer acceptability
  • oxidation
  • sensory analysis

Cite this

Pleasance, Emily A. ; Kerr, William L. ; Pegg, Ronald B. ; Swanson, Ruthann B. ; Cheely, Anna N. ; Huang, Guangwei ; Parrish, Daniel R. ; Kerrihard, Adrian. / Effects of Storage Conditions on Consumer and Chemical Assessments of Raw ‘Nonpareil’ Almonds Over a Two-Year Period. In: Journal of Food Science. 2018 ; Vol. 83, No. 3. pp. 822-830.
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Effects of Storage Conditions on Consumer and Chemical Assessments of Raw ‘Nonpareil’ Almonds Over a Two-Year Period. / Pleasance, Emily A.; Kerr, William L.; Pegg, Ronald B.; Swanson, Ruthann B.; Cheely, Anna N.; Huang, Guangwei; Parrish, Daniel R.; Kerrihard, Adrian.

In: Journal of Food Science, Vol. 83, No. 3, 01.03.2018, p. 822-830.

Research output: Contribution to journalArticleResearchpeer-review

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N2 - Abstract: Raw almonds are a major commodity, yet much is unknown about how storage conditions determine their shelf life. The storage stability, as measured by consumer assessments and chemical measures, of raw almonds was determined for samples stored in cardboard boxes and polypropylene packaging for 2 years at 4, 15, 25, and 35 °C, and at 50% and 65% relative humidity (RH). Samples stored in unlined cartons always failed (>25% rejection) before their counterparts stored in polypropylene bags under identical environmental conditions. Models determined that polypropylene packaging (as opposed to unlined cardboard cartons) extended the time until sample rejection by more than 7 months. Temperature and RH were both negatively associated with storage time until failure. Flavor was a greater contributor to consumer acceptability than texture or odor, while peroxide values and free fatty acids were of greater importance in predicting raw almond consumer quality than measures of conjugated dienes or 2-thiobarbituric acid-reactive substances. Practical Application: The results of this study will allow almond producers to determine packaging types and environmental storage conditions that provide shelf life of a specified time.

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