Alkali modification of carrageenans. Part IV. Porphyrans as model compounds

The rate of alkaline cyclization of porphyran is of the same order as those of carrageenan model compounds containing non-sulfated beta-D-galactose units. These units show that the cyclization of the alpha-galactosyl units does not depend on the beta-D-adjacent sugar residues when they carry no sulf...

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Detalles Bibliográficos
Publicado: 2000
Materias:
Alkalinity
Conformations
Nuclear magnetic resonance spectroscopy
Seaweed
Sugars
Alkaline cyclization
Carrageenans
Porphyran
Polysaccharides
algae
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01448617_v42_n3_p301_Noseda
http://hdl.handle.net/20.500.12110/paper_01448617_v42_n3_p301_Noseda
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_01448617_v42_n3_p301_Noseda
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spelling paper:paper_01448617_v42_n3_p301_Noseda2023-06-08T15:12:08Z Alkali modification of carrageenans. Part IV. Porphyrans as model compounds Alkalinity Conformations Nuclear magnetic resonance spectroscopy Seaweed Sugars Alkaline cyclization Carrageenans Porphyran Polysaccharides algae The rate of alkaline cyclization of porphyran is of the same order as those of carrageenan model compounds containing non-sulfated beta-D-galactose units. These units show that the cyclization of the alpha-galactosyl units does not depend on the beta-D-adjacent sugar residues when they carry no sulfate groups. These suggest that there is no influence of the alpha-D-galactose 2-sulfate on the cyclization rate, in spite of its change from the equatorial to the axial position during the conversion of the 4C1 to 1C4 chair conformation. 2000 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01448617_v42_n3_p301_Noseda http://hdl.handle.net/20.500.12110/paper_01448617_v42_n3_p301_Noseda
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Alkalinity
Conformations
Nuclear magnetic resonance spectroscopy
Seaweed
Sugars
Alkaline cyclization
Carrageenans
Porphyran
Polysaccharides
algae
spellingShingle Alkalinity
Conformations
Nuclear magnetic resonance spectroscopy
Seaweed
Sugars
Alkaline cyclization
Carrageenans
Porphyran
Polysaccharides
algae
Alkali modification of carrageenans. Part IV. Porphyrans as model compounds
topic_facet Alkalinity
Conformations
Nuclear magnetic resonance spectroscopy
Seaweed
Sugars
Alkaline cyclization
Carrageenans
Porphyran
Polysaccharides
algae
description The rate of alkaline cyclization of porphyran is of the same order as those of carrageenan model compounds containing non-sulfated beta-D-galactose units. These units show that the cyclization of the alpha-galactosyl units does not depend on the beta-D-adjacent sugar residues when they carry no sulfate groups. These suggest that there is no influence of the alpha-D-galactose 2-sulfate on the cyclization rate, in spite of its change from the equatorial to the axial position during the conversion of the 4C1 to 1C4 chair conformation.
title Alkali modification of carrageenans. Part IV. Porphyrans as model compounds
title_short Alkali modification of carrageenans. Part IV. Porphyrans as model compounds
title_full Alkali modification of carrageenans. Part IV. Porphyrans as model compounds
title_fullStr Alkali modification of carrageenans. Part IV. Porphyrans as model compounds
title_full_unstemmed Alkali modification of carrageenans. Part IV. Porphyrans as model compounds
title_sort alkali modification of carrageenans. part iv. porphyrans as model compounds
publishDate 2000
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01448617_v42_n3_p301_Noseda
http://hdl.handle.net/20.500.12110/paper_01448617_v42_n3_p301_Noseda
_version_ 1768543509040594944

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