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Kinetics of drosopterin release as indicator pigment for heat-induced color changes of brown shrimp (Crangon crangon)
Verhaeghe, T.; Van Poucke, C.; Vlaemynck, G.; De Block, J.; Hendrickx, M.E. (2018). Kinetics of drosopterin release as indicator pigment for heat-induced color changes of brown shrimp (Crangon crangon). Food Chemistry 254: 359-366. https://hdl.handle.net/10.1016/j.foodchem.2018.01.195
In: Food Chemistry. Elsevier: London. ISSN 0308-8146; e-ISSN 1873-7072, more
Peer reviewed article  

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Keywords
    Crangon crangon (Linnaeus, 1758) [WoRMS]
    Marine
Author keywords
    Crangon crangon; Color change; Drosopterin; Astaxanthin; Kinetics;Cooking

Authors  Top 
  • Verhaeghe, T.
  • Van Poucke, C., more
  • Vlaemynck, G., more
  • De Block, J., more
  • Hendrickx, M.E., more

Abstract
    Heat-induced color changes of crustaceans are commonly described as the release of astaxanthin. In this study on Crangon crangon, it was found that astaxanthin plays a minor role in the (dis)coloration. By LC-HRMS, two polar, process dependent pigments were found. One pigment was identified as riboflavin and one as drosopterin (level-2 certainty). Thermal treatments had highest effect on drosopterin concentration changes and were chosen as indicator for a kinetic study of heat-induced color changes. The kinetic data fitted a consecutive step model (r2 = 0.971), including a first step in which drosopterin was released (kd,85°C = 0.95 ± 0.09 min−1; Ead = 105 ± 4 kJ/mol) and a second step where drosopterin is degraded (kb,85°C = 0.02 ± 0.002 min−1; Eab = 190 ± 15 kJ/mol). The kinetic model shows that shrimp should be heated at lower temperatures (<80 °C) than the heating temperatures used by fishermen (86–101 °C), creating opportunities for quality optimization. Therefore, this study delivers essential information needed in a comprehensive quality optimization study of the cooked brown shrimp.

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