Mar. Drugs 2011, 9(7), 1176-1186; doi:10.3390/md9071176
Article

Thermal Transition Properties of Hoki (Macruronus novaezelandiae) and Ling (Genypterus blacodes) Skin Collagens: Implications for Processing

1,* email and 2email
Received: 6 May 2011; in revised form: 21 June 2011 / Accepted: 22 June 2011 / Published: 28 June 2011
(This article belongs to the Special Issue Marine Functional Food)
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Abstract: Hoki (Macruronus novaezelandiae) and ling (Genypterus blacodes) are cold-water fish caught in New Zealand waters. Their skins are a major component of the post-processing waste stream. Valuable products could be developed from the skins, as they are primarily composed of collagen, which has many commercial applications. We prepared acid soluble collagens (ASC) from hoki and ling skins, and analyzed their thermal denaturation properties using a Rapid Visco™ Analyzer. At slower heating rates the denaturation temperature (TD) of hoki and ling collagens decreased. This result is consistent with the model of irreversible rate kinetics for the denaturation of collagen. We determined the effects of solvents that disrupt hydrogen bonding on ASC stability. Increasing concentrations of urea from 0.1 M to 1.0 M and acetic acid from 0.1 M to 0.5 M decreased TD. This resulted from the effects of these reagents on the hydrogen bonds that stabilize the collagen triple helix.
Keywords: collagen; cold water fish; processing waste; thermal denaturation temperature; Rapid Visco™ Analyzer
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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MDPI and ACS Style

Hofman, K.A.; Newberry, M. Thermal Transition Properties of Hoki (Macruronus novaezelandiae) and Ling (Genypterus blacodes) Skin Collagens: Implications for Processing. Mar. Drugs 2011, 9, 1176-1186.

AMA Style

Hofman KA, Newberry M. Thermal Transition Properties of Hoki (Macruronus novaezelandiae) and Ling (Genypterus blacodes) Skin Collagens: Implications for Processing. Marine Drugs. 2011; 9(7):1176-1186.

Chicago/Turabian Style

Hofman, Kathleen Anne; Newberry, Marcus. 2011. "Thermal Transition Properties of Hoki (Macruronus novaezelandiae) and Ling (Genypterus blacodes) Skin Collagens: Implications for Processing." Mar. Drugs 9, no. 7: 1176-1186.


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