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Abstract:

The "intermediate" fractions of the carrageenan of Iridaea undulosa, with are precipitated at 1.20-1.25m, 1.35-1.40m, and 1.55-1.65m concentrations of potassium chloride, are mixtures of μ/ν-carrageenans and λ-carrageenans. The λ-carrageenans contain mainly 3-linked, 2-sulfated (33.5-39.0%) and 2,6-disulfated (5.6-11.8%) galactose units, together with 4-linked, 2-sulfated (1.8-5.9%), 6-sulfated and/or 2,6-disulfated (39.0-40.1%), and other 2,6-disubstituted (3.7-4.3%) galactose residues. The presence of this last unit suggests that some C-6 atoms must be either branching points or blocked by glycosidic linkages. When the compositions of these gel-forming λ-carrageenans are compared with those of the "soluble" λ-carrageenans from the same seaweed, it is clear that in the latter ones there is a higher diversification of the structural units and more "solubility-promoting" residues. © 1988.

Registro:

Documento: Artículo
Título:The λ-components of the "intermediate" fractions of the carrageenan form Iridaea undulosa
Autor:Stortz, C.A.; Cerezo, A.S.
Filiación:Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales (UBA), Pabellon 2, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Año:1988
Volumen:172
Número:1
Página de inicio:139
Página de fin:146
DOI: http://dx.doi.org/10.1016/S0008-6215(00)90847-4
Título revista:Carbohydrate Research
Título revista abreviado:Carbohydr. Res.
ISSN:00086215
CODEN:CRBRA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00086215_v172_n1_p139_Stortz

Referencias:

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Citas:

---------- APA ----------
Stortz, C.A. & Cerezo, A.S. (1988) . The λ-components of the "intermediate" fractions of the carrageenan form Iridaea undulosa. Carbohydrate Research, 172(1), 139-146.
http://dx.doi.org/10.1016/S0008-6215(00)90847-4
---------- CHICAGO ----------
Stortz, C.A., Cerezo, A.S. "The λ-components of the "intermediate" fractions of the carrageenan form Iridaea undulosa" . Carbohydrate Research 172, no. 1 (1988) : 139-146.
http://dx.doi.org/10.1016/S0008-6215(00)90847-4
---------- MLA ----------
Stortz, C.A., Cerezo, A.S. "The λ-components of the "intermediate" fractions of the carrageenan form Iridaea undulosa" . Carbohydrate Research, vol. 172, no. 1, 1988, pp. 139-146.
http://dx.doi.org/10.1016/S0008-6215(00)90847-4
---------- VANCOUVER ----------
Stortz, C.A., Cerezo, A.S. The λ-components of the "intermediate" fractions of the carrageenan form Iridaea undulosa. Carbohydr. Res. 1988;172(1):139-146.
http://dx.doi.org/10.1016/S0008-6215(00)90847-4