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Chemical and rheological characterization of the carrageenans from Hypnea musciformis (Wulfen) Lamoroux.
Carbohydr Polym. 2014 Feb 15; 102:780-9.CP

Abstract

This work reports a chemical and rheological study of the carrageenans from Hypnea musciformis, a red seaweed commercially known for its production of κ-carrageenan. The polysaccharides were extracted with water both at room temperature and at 90 °C: the yield of the latter was about six times larger than the former. Fractionation with KCl yielded a large proportion (50-67%) of a precipitate with 0.125 M of this salt for both extracts, with characteristics of a nearly pure κ-carrageenan, as determined by methylation analysis and NMR spectroscopy. Smaller amounts of fractions precipitating at higher concentrations showed a basic κ-carrageenan structure, but included some ι-carrageenan diads. The KCl-soluble polysaccharides showed a larger complexity, containing d- and l-galactans or d/l-hybrids. Some differences in the rheological properties of these carrageenans have been found. Although all KCl-precipitating polysaccharides form true gels at 10 °C in presence of KCl, those extracted with hot water form stronger gels than those extracted at room temperature. Both purified κ-carrageenans show lower gelling and melting temperature than the whole polysaccharides from which they were originated.

Authors+Show Affiliations

Departamento de Química Orgánica-CIHIDECAR, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina.Departamento de Química Orgánica-CIHIDECAR, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina.Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina.Departamento de Industrias, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina.Departamento de Química Orgánica-CIHIDECAR, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, 1428 Buenos Aires, Argentina. Electronic address: stortz@qo.fcen.uba.ar.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

24507347

Citation

Cosenza, Vanina A., et al. "Chemical and Rheological Characterization of the Carrageenans From Hypnea Musciformis (Wulfen) Lamoroux." Carbohydrate Polymers, vol. 102, 2014, pp. 780-9.
Cosenza VA, Navarro DA, Fissore EN, et al. Chemical and rheological characterization of the carrageenans from Hypnea musciformis (Wulfen) Lamoroux. Carbohydr Polym. 2014;102:780-9.
Cosenza, V. A., Navarro, D. A., Fissore, E. N., Rojas, A. M., & Stortz, C. A. (2014). Chemical and rheological characterization of the carrageenans from Hypnea musciformis (Wulfen) Lamoroux. Carbohydrate Polymers, 102, 780-9. https://doi.org/10.1016/j.carbpol.2013.10.090
Cosenza VA, et al. Chemical and Rheological Characterization of the Carrageenans From Hypnea Musciformis (Wulfen) Lamoroux. Carbohydr Polym. 2014 Feb 15;102:780-9. PubMed PMID: 24507347.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Chemical and rheological characterization of the carrageenans from Hypnea musciformis (Wulfen) Lamoroux. AU - Cosenza,Vanina A, AU - Navarro,Diego A, AU - Fissore,Eliana N, AU - Rojas,Ana M, AU - Stortz,Carlos A, Y1 - 2013/11/06/ PY - 2013/07/01/received PY - 2013/09/24/revised PY - 2013/10/29/accepted PY - 2014/2/11/entrez PY - 2014/2/11/pubmed PY - 2014/10/18/medline KW - Carrageenans KW - Dynamic oscillatory KW - Rheology KW - κ-Carrageenan SP - 780 EP - 9 JF - Carbohydrate polymers JO - Carbohydr Polym VL - 102 N2 - This work reports a chemical and rheological study of the carrageenans from Hypnea musciformis, a red seaweed commercially known for its production of κ-carrageenan. The polysaccharides were extracted with water both at room temperature and at 90 °C: the yield of the latter was about six times larger than the former. Fractionation with KCl yielded a large proportion (50-67%) of a precipitate with 0.125 M of this salt for both extracts, with characteristics of a nearly pure κ-carrageenan, as determined by methylation analysis and NMR spectroscopy. Smaller amounts of fractions precipitating at higher concentrations showed a basic κ-carrageenan structure, but included some ι-carrageenan diads. The KCl-soluble polysaccharides showed a larger complexity, containing d- and l-galactans or d/l-hybrids. Some differences in the rheological properties of these carrageenans have been found. Although all KCl-precipitating polysaccharides form true gels at 10 °C in presence of KCl, those extracted with hot water form stronger gels than those extracted at room temperature. Both purified κ-carrageenans show lower gelling and melting temperature than the whole polysaccharides from which they were originated. SN - 1879-1344 UR - https://www.unboundmedicine.com/medline/citation/24507347/Chemical_and_rheological_characterization_of_the_carrageenans_from_Hypnea_musciformis__Wulfen__Lamoroux_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0144-8617(13)01119-3 DB - PRIME DP - Unbound Medicine ER -