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Fresh apple slice preservation driven by molecular hydrogen.

Shanshan Jin1, Guanjie Zhu1, Hao Wang1

  • 1College of Life Sciences, Laboratory Center of Life Sciences, Nanjing Agricultural University, Nanjing 210095, China.

Food Chemistry
|May 30, 2025
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Summary
This summary is machine-generated.

Hydrogen gas (H2) modified atmosphere packing (MAP) can preserve fresh-cut apples. A 0.1% H2 MAP treatment significantly reduced browning and water loss, enhancing overall produce quality and shelf life.

Keywords:
BrowningFlavonoid biosynthesisFresh apple sliceHydrogen gasModified atmosphere packagingNon-targeted metabolomics

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Area of Science:

  • Food Science
  • Plant Physiology
  • Biochemistry

Background:

  • Fresh-cut apple slices degrade rapidly during storage, exhibiting browning and physiological damage.
  • Decreased hydrogen gas (H2) content correlates with this degradation.
  • Modified atmosphere packing (MAP) is a common preservation technique for fresh produce.

Purpose of the Study:

  • To investigate the role of hydrogen gas (H2) in the preservation of fresh-cut apple slices.
  • To determine the optimal H2 concentration for mitigating degradation during storage.
  • To explore the molecular mechanisms underlying H2-mediated preservation.

Main Methods:

  • Fresh-cut apple slices were stored for 8 days at 4°C and 85% relative humidity.
  • Hydrogen gas (H2) modified atmosphere packing (MAP) was applied with varying H2 concentrations (0.01%, 0.1%, and 1%).
  • Quality attributes (browning, water loss, sensory quality, nutritional value, antioxidant capacity) were assessed.
  • Non-targeted metabolomics and molecular analyses were performed.

Main Results:

  • A 0.1% H2 MAP treatment significantly retarded browning and water loss in apple slices.
  • This concentration partially restored H2 homeostasis and slowed the reduction in sensory quality, nutritional value, and antioxidant capacity.
  • Non-targeted metabolomics revealed upregulation of flavonoid biosynthesis via the phenylpropane metabolic pathway.

Conclusions:

  • Hydrogen gas (H2) modified atmosphere packing (MAP) shows significant potential for preserving fresh-cut apple slices.
  • The 0.1% H2 concentration is effective in maintaining quality attributes and extending shelf life.
  • H2 MAP may offer a novel approach for the preservation and processing of fresh-cut produce by influencing key metabolic pathways.