Color Change of the Snapper (Pagrus auratus) and Gurnard (Chelidonichthys kumu) Skin and Eyes during Storage: Effect of Light Polarization and Contact with Ice

Ten gurnard and 10 snapper were stored on ice. One side always contacted the ice; the other side was always exposed to air. At different intervals for up to 12 d, the fish were placed in a light box, and the images of both sides were taken using polarized and nonpolarized illumination. Image analysi...

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Veröffentlicht in:Journal of food science 2014-12, Vol.79 (12), p.E2456-E2462
Hauptverfasser: Balaban, Murat O, Stewart, Kelsie, Fletcher, Graham C, Alçiçek, Zayde
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container_issue 12
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container_title Journal of food science
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creator Balaban, Murat O
Stewart, Kelsie
Fletcher, Graham C
Alçiçek, Zayde
description Ten gurnard and 10 snapper were stored on ice. One side always contacted the ice; the other side was always exposed to air. At different intervals for up to 12 d, the fish were placed in a light box, and the images of both sides were taken using polarized and nonpolarized illumination. Image analysis resulted in average L*, a*, and b* values of skin, and average L* values of the eyes. The skin L* value of gurnard changed significantly over time while that of snapper was substantially constant. The a* and b* values of both fish decreased over time. The L* values of eyes were significantly lower for polarized images, and significantly lower for the side of fish exposed to air only. This may be a concern in quality evaluation methods such as QIM. The difference of colors between the polarized and nonpolarized images was calculated to quantify the reflection off the surface of fish. For accurate measurement of surface color and eye color, use of polarized light is recommended.
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source MEDLINE; Wiley Online Library Journals Frontfile Complete
subjects Animals
Chelidonichthys
Chelidonichthys kumu
Color
Contact
contact with ice
Exposure
Eye
eye color
Eyes
Eyes & eyesight
Fish
Food science
Food Storage - methods
gurnard
Ice
image analysis
Light
lighting
Pagrus
Pagrus auratus
Perciformes
Polarized light
Seafood
Skin
snapper
Snappers
Storage
storage time
title Color Change of the Snapper (Pagrus auratus) and Gurnard (Chelidonichthys kumu) Skin and Eyes during Storage: Effect of Light Polarization and Contact with Ice
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