Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii

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...

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Detalles Bibliográficos
Autores principales:	Matulewicz, M.C., Ciancia, M., Noseda, M.D., Cerezo, A.S.
Formato:	JOUR
Materias:	carrageenans. Gigartina skottsbergii Gigartinaceae nuclear phases Rhodophyta seaweed
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_00319422_v28_n11_p2937_Matulewicz
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_00319422_v28_n11_p2937_Matulewicz
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spelling	todo:paper_00319422_v28_n11_p2937_Matulewicz2023-10-03T14:44:07Z Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii Matulewicz, M.C. Ciancia, M. Noseda, M.D. Cerezo, A.S. carrageenans. Gigartina skottsbergii Gigartinaceae nuclear phases Rhodophyta seaweed 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. Fil:Matulewicz, M.C. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Ciancia, M. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Noseda, M.D. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cerezo, A.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00319422_v28_n11_p2937_Matulewicz
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	carrageenans. Gigartina skottsbergii Gigartinaceae nuclear phases Rhodophyta seaweed
spellingShingle	carrageenans. Gigartina skottsbergii Gigartinaceae nuclear phases Rhodophyta seaweed Matulewicz, M.C. Ciancia, M. Noseda, M.D. Cerezo, A.S. Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii
topic_facet	carrageenans. Gigartina skottsbergii Gigartinaceae nuclear phases Rhodophyta seaweed
description	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.
format	JOUR
author	Matulewicz, M.C. Ciancia, M. Noseda, M.D. Cerezo, A.S.
author_facet	Matulewicz, M.C. Ciancia, M. Noseda, M.D. Cerezo, A.S.
author_sort	Matulewicz, M.C.
title	Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii
title_short	Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii
title_full	Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii
title_fullStr	Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii
title_full_unstemmed	Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii
title_sort	carrageenan systems from tetrasporic and cystocarpic stages of gigartina skottsbergii
url	http://hdl.handle.net/20.500.12110/paper_00319422_v28_n11_p2937_Matulewicz
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Carrageenan systems from tetrasporic and cystocarpic stages of Gigartina skottsbergii

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