β-D-(1→4), β-D-(1→3) 'mixed linkage' xylans from red seaweeds of the order Nemaliales and Palmariales

Xylans from five seaweeds belonging to the order Nemaliales (Galaxaura marginata, Galaxaura obtusata, Tricleocarpa cylindrica, Tricleocarpa fragilis, and Scinaia halliae) and one of the order Palmariales (Palmaria palmata) collected on the Brazilian coasts were extracted with hot water and purified...

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Publicado:	2011
Materias:	β-d-(1→4), β-d-(1→3) 'mixed linkage' structures Algal polysaccharides Nemaliales Palmariales Red seaweeds Xylans Nuclear magnetic resonance spectroscopy Optical rotation Seaweed Solvent extraction Polysaccharides polysaccharide xylan alga article Brazil chemical structure coastal waters extraction methylation nonhuman nuclear magnetic resonance spectroscopy precipitation priority journal red seaweed seaweed Carbohydrate Conformation Magnetic Resonance Spectroscopy Methylation Optical Processes Rhodophyta Stereoisomerism algae Galaxaura marginata Galaxaura obtusata Palmaria palmata Scinaia Tricleocarpa cylindrica Tricleocarpa fragilis
Acceso en línea:	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00086215_v346_n8_p1023_Viana http://hdl.handle.net/20.500.12110/paper_00086215_v346_n8_p1023_Viana
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	paper:paper_00086215_v346_n8_p1023_Viana
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spelling	paper:paper_00086215_v346_n8_p1023_Viana2025-07-30T17:16:03Z β-D-(1→4), β-D-(1→3) 'mixed linkage' xylans from red seaweeds of the order Nemaliales and Palmariales β-d-(1→4), β-d-(1→3) 'mixed linkage' structures Algal polysaccharides Nemaliales Palmariales Red seaweeds Xylans Algal polysaccharides Nemaliales Palmariales Red seaweeds Xylans Nuclear magnetic resonance spectroscopy Optical rotation Seaweed Solvent extraction Polysaccharides polysaccharide xylan alga article Brazil chemical structure coastal waters extraction methylation Nemaliales nonhuman nuclear magnetic resonance spectroscopy Palmariales precipitation priority journal red seaweed seaweed Carbohydrate Conformation Magnetic Resonance Spectroscopy Methylation Optical Processes Rhodophyta Stereoisomerism Xylans algae Galaxaura marginata Galaxaura obtusata Nemaliales Palmaria palmata Palmariales Scinaia Tricleocarpa cylindrica Tricleocarpa fragilis Xylans from five seaweeds belonging to the order Nemaliales (Galaxaura marginata, Galaxaura obtusata, Tricleocarpa cylindrica, Tricleocarpa fragilis, and Scinaia halliae) and one of the order Palmariales (Palmaria palmata) collected on the Brazilian coasts were extracted with hot water and purified from acid xylomannans and/or xylogalactans through Cetavlon precipitation of the acid polysaccharides. The β-d-(1→4), β-d-(1→3) 'mixed linkage' structures were determined using methylation analysis and 1D and 2D NMR spectroscopy. The presence of large sequences of β-(1→4)-linked units suggests transient aggregates of ribbon- or helical-ordered structures that would explain the low optical rotations. © 2011 Elsevier Ltd. All rights reserved. 2011 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00086215_v346_n8_p1023_Viana http://hdl.handle.net/20.500.12110/paper_00086215_v346_n8_p1023_Viana
institution	Universidad de Buenos Aires
institution_str	I-28
repository_str	R-134
collection	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic	β-d-(1→4), β-d-(1→3) 'mixed linkage' structures Algal polysaccharides Nemaliales Palmariales Red seaweeds Xylans Algal polysaccharides Nemaliales Palmariales Red seaweeds Xylans Nuclear magnetic resonance spectroscopy Optical rotation Seaweed Solvent extraction Polysaccharides polysaccharide xylan alga article Brazil chemical structure coastal waters extraction methylation Nemaliales nonhuman nuclear magnetic resonance spectroscopy Palmariales precipitation priority journal red seaweed seaweed Carbohydrate Conformation Magnetic Resonance Spectroscopy Methylation Optical Processes Rhodophyta Stereoisomerism Xylans algae Galaxaura marginata Galaxaura obtusata Nemaliales Palmaria palmata Palmariales Scinaia Tricleocarpa cylindrica Tricleocarpa fragilis
spellingShingle	β-d-(1→4), β-d-(1→3) 'mixed linkage' structures Algal polysaccharides Nemaliales Palmariales Red seaweeds Xylans Algal polysaccharides Nemaliales Palmariales Red seaweeds Xylans Nuclear magnetic resonance spectroscopy Optical rotation Seaweed Solvent extraction Polysaccharides polysaccharide xylan alga article Brazil chemical structure coastal waters extraction methylation Nemaliales nonhuman nuclear magnetic resonance spectroscopy Palmariales precipitation priority journal red seaweed seaweed Carbohydrate Conformation Magnetic Resonance Spectroscopy Methylation Optical Processes Rhodophyta Stereoisomerism Xylans algae Galaxaura marginata Galaxaura obtusata Nemaliales Palmaria palmata Palmariales Scinaia Tricleocarpa cylindrica Tricleocarpa fragilis β-D-(1→4), β-D-(1→3) 'mixed linkage' xylans from red seaweeds of the order Nemaliales and Palmariales
topic_facet	β-d-(1→4), β-d-(1→3) 'mixed linkage' structures Algal polysaccharides Nemaliales Palmariales Red seaweeds Xylans Algal polysaccharides Nemaliales Palmariales Red seaweeds Xylans Nuclear magnetic resonance spectroscopy Optical rotation Seaweed Solvent extraction Polysaccharides polysaccharide xylan alga article Brazil chemical structure coastal waters extraction methylation Nemaliales nonhuman nuclear magnetic resonance spectroscopy Palmariales precipitation priority journal red seaweed seaweed Carbohydrate Conformation Magnetic Resonance Spectroscopy Methylation Optical Processes Rhodophyta Stereoisomerism Xylans algae Galaxaura marginata Galaxaura obtusata Nemaliales Palmaria palmata Palmariales Scinaia Tricleocarpa cylindrica Tricleocarpa fragilis
description	Xylans from five seaweeds belonging to the order Nemaliales (Galaxaura marginata, Galaxaura obtusata, Tricleocarpa cylindrica, Tricleocarpa fragilis, and Scinaia halliae) and one of the order Palmariales (Palmaria palmata) collected on the Brazilian coasts were extracted with hot water and purified from acid xylomannans and/or xylogalactans through Cetavlon precipitation of the acid polysaccharides. The β-d-(1→4), β-d-(1→3) 'mixed linkage' structures were determined using methylation analysis and 1D and 2D NMR spectroscopy. The presence of large sequences of β-(1→4)-linked units suggests transient aggregates of ribbon- or helical-ordered structures that would explain the low optical rotations. © 2011 Elsevier Ltd. All rights reserved.
title	β-D-(1→4), β-D-(1→3) 'mixed linkage' xylans from red seaweeds of the order Nemaliales and Palmariales
title_short	β-D-(1→4), β-D-(1→3) 'mixed linkage' xylans from red seaweeds of the order Nemaliales and Palmariales
title_full	β-D-(1→4), β-D-(1→3) 'mixed linkage' xylans from red seaweeds of the order Nemaliales and Palmariales
title_fullStr	β-D-(1→4), β-D-(1→3) 'mixed linkage' xylans from red seaweeds of the order Nemaliales and Palmariales
title_full_unstemmed	β-D-(1→4), β-D-(1→3) 'mixed linkage' xylans from red seaweeds of the order Nemaliales and Palmariales
title_sort	β-d-(1→4), β-d-(1→3) 'mixed linkage' xylans from red seaweeds of the order nemaliales and palmariales
publishDate	2011
url	https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00086215_v346_n8_p1023_Viana http://hdl.handle.net/20.500.12110/paper_00086215_v346_n8_p1023_Viana
_version_	1840323189087928320

β-D-(1→4), β-D-(1→3) 'mixed linkage' xylans from red seaweeds of the order Nemaliales and Palmariales

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