Please use this identifier to cite or link to this item: http://dx.doi.org/10.25673/118159
Title: Ice recrystallization inhibition activity of chemically defined carrageenans
Author(s): Hale, Julia
Furch, Alisa
Gerhäuser, Julian
Gaukel, VolkerLook up in the Integrated Authority File of the German National Library
Wefers, DanielLook up in the Integrated Authority File of the German National Library
Issue Date: 2024
Type: Article
Language: English
Abstract: Carrageenans are sulfated galactans from algae which are commonly used as thickeners, gelling agents, or stabilizers. It has been demonstrated that they also have significant ice recrystallization inhibition (IRI) activity. Previous studies mainly focused on κ-carrageenan, but recent studies suggested that other carrageenans such as ι-carrageenans or carrageenans with multiple structural elements also have this functionality. Therefore, the aim of our study was to analyze and compare the IRI activity of carrageenans with defined chemical structures and associated cations. For this purpose, κ- and ι-carrageenans as well as several hybrid carrageenans showing broad heterogeneity with regards to the molecular structure and the cations present were investigated. The selected commercial samples were subsequently converted into their potassium, calcium and (in part) sodium forms. Chemical characterization of the modified carrageenans demonstrated that the molecular structure was unaltered by the applied procedures and that the carrageenans were successfully converted into the different cation forms. The analysis of the IRI activity demonstrated that both molecular structure and associated cations had an influence on carrageenan functionality. The κ-carrageenan and hybrid carrageenans with consecutive κ-units showed a high IRI activity, whereas ι-carrageenan was less active. For κ-carrageenan, the potassium form showed a clearly higher activity than the calcium form, whereas the calcium form was more active for hybrid carrageenans and ι-carrageenans. Our results significantly expand the knowledge on the relationship between the molecular composition and the IRI activity of carrageenans. Furthermore, they can be used to optimize carrageenan production to obtain an enhanced IRI activity.
URI: https://opendata.uni-halle.de//handle/1981185920/120118
http://dx.doi.org/10.25673/118159
Open Access: Open access publication
License: (CC BY 4.0) Creative Commons Attribution 4.0(CC BY 4.0) Creative Commons Attribution 4.0
Journal Title: Food hydrocolloids
Publisher: Elsevier
Publisher Place: Amsterdam
Volume: 157
Original Publication: 10.1016/j.foodhyd.2024.110423
Page Start: 1
Page End: 8
Appears in Collections:Open Access Publikationen der MLU

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