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Abstract:

Cystocarpic and tetrasporangial plants of Gigartina skottsbergii produced different systems of carrageenans. These carrageenans were fractionated with potassium chloride and analysed. The ranges of precipitation, the molar ratios Gal:3,6-AnGal: sulphate and the IR spectra of the fractions indicated that the cystocarpic system was composed of similar amounts of gelling and soluble carrageenans of the K/1- and μ/ν-type, respectively. The tetrasporic system was composed of a major fraction of the λ- type precipitated at 0.60-1.00 M KCl and two minor fractions, one of the λ-type precipitated at 1.10-1.30 M KCl and the other soluble in 2.00 M KCl with a λ- like IR spectrum but μ/ν- like analytical data (ω-carrageenan). The major cystocarpic and tetrasporic carrageenan fractions were submitted to alkaline treatment and further fractionation with potassium chloride. The modified cystocarpic polysaccharide fractions gave products comprising mainly gelling carrageenans while the modified tetrasporic polysaccharide fractions yielded soluble carrageenans in agreement with previously assigned structures. © 1983.

Registro:

Documento: Artículo
Título:Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii
Autor:Matulewicz, M.C.; Ciancia, M.; Noseda, M.D.; Cerezo, A.S.
Filiación:Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellon 2, Ciudad Universitaria, 1428 Buenos Aires, Argentina
Palabras clave:carrageenans.; Gigartina skottsbergii; Gigartinaceae; nuclear phases; Rhodophyta; seaweed
Año:1989
Volumen:28
Número:11
Página de inicio:2937
Página de fin:2941
DOI: http://dx.doi.org/10.1016/0031-9422(89)80257-2
Título revista:Phytochemistry
Título revista abreviado:Phytochemistry
ISSN:00319422
CODEN:PYTCA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00319422_v28_n11_p2937_Matulewicz

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Citas:

---------- APA ----------
Matulewicz, M.C., Ciancia, M., Noseda, M.D. & Cerezo, A.S. (1989) . Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii. Phytochemistry, 28(11), 2937-2941.
http://dx.doi.org/10.1016/0031-9422(89)80257-2
---------- CHICAGO ----------
Matulewicz, M.C., Ciancia, M., Noseda, M.D., Cerezo, A.S. "Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii" . Phytochemistry 28, no. 11 (1989) : 2937-2941.
http://dx.doi.org/10.1016/0031-9422(89)80257-2
---------- MLA ----------
Matulewicz, M.C., Ciancia, M., Noseda, M.D., Cerezo, A.S. "Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii" . Phytochemistry, vol. 28, no. 11, 1989, pp. 2937-2941.
http://dx.doi.org/10.1016/0031-9422(89)80257-2
---------- VANCOUVER ----------
Matulewicz, M.C., Ciancia, M., Noseda, M.D., Cerezo, A.S. Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii. Phytochemistry. 1989;28(11):2937-2941.
http://dx.doi.org/10.1016/0031-9422(89)80257-2