While Curing in the Stack Pole ... Hull Scrape black pods increased - - PowerPoint PPT Presentation

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While Curing in the Stack Pole ... Hull Scrape black pods increased - - PowerPoint PPT Presentation

Oct 20, 2022 300 likes •671 views

. A-APRES 2015 Post Harvest Quality Symposium Roasted Peanut Flavor A Limited Characteristic OR Broad Opportunity ? Dr. Tim Sanders Consultant USDA, ARS Retired Professor Emeritus NC State University . A-APRES 2015 Post Harvest Quality

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. A-APRES 2015 Post Harvest Quality Symposium

Roasted Peanut Flavor

A Limited Characteristic

OR

Broad Opportunity ?

  • Dr. Tim Sanders

Consultant USDA, ARS Retired Professor Emeritus NC State University

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. A-APRES 2015 Post Harvest Quality Symposium

While Curing in the Stack Pole ... Hull Scrape black pods increased from ca. 18% to ca. 52% in 30 days Medium grade size contained 30-40 % more seed from black pods in 30 days

Sanders et al. Peanut Science (1997) 24:25-31

Higher RP flavor is found in mature peanuts.

Sanders et al. J Food

  • Sci. (1989) 54:475-477
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. A-APRES 2015 Post Harvest Quality Symposium

Weights and Calculated Weight Percent of Medium Size Peanuts

Color Class Weight(g) Percent Yellow 2 498.4 8.2 Orange A 492.5 8.1

OrangeB

1238.2 20.3 Brown 1758.4 28.8 Black 2118.7 34.7

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TC-2 TC-4 TC-5 TC-6 TC-8 TC-10 TC-11 TC-12 TC-14

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36

Time on belt (minutes)*

0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 80-90 90-100 100-110 110-120 120-130 130-140 140-150 150-160 160-170

Contours (°C)

Hopper Gap Heating Zone 1 Heating Zone 2 Cooling Zone Unload

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. A-APRES 2015 Post Harvest Quality Symposium

Main Volatile Contributors to Roasted Peanut Flavor

Neta, E. Ph.D. NCSU 2010 methional non anal

  • ctanal

carbon disulfide 1-octen-3-one hexanal 2-acetyl-1-pyrroline phenylacetaldehyde Chetschik et al, J. Agric. Food Chem. 2010, 58:11018 methional methanethiol 2-methylbutanal 2,3-pentanedione 3-methylbutanal 2-acetyl-1-pyrroline

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Precursors and pathways?

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Genomic Map

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PHYSIOLOGICAL

Hormonal, metabolic

ENYIROIDvIENT __,,

Physical, chemical, biological stress Development.

4" Differe.ltintion

hlf(>('tion or hrumnuty? ' Stress Req>01\se

Plt ysio lo

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· 1 Patholo~ ·
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