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Abstract:

A desulfation method using chlorotrimethylsilane for treatment of pyridinium salts of sulfated galactans was developed. It proved to be appropriate for desulfation of polysaccharides of both agar and carrageenan families. In order to evaluate its efficiency in presence of the maximum content of 3,6-anhydrogalactose, it was applied to commercial κ-carrageenan, leading to obtention of a product mainly composed by β-carrageenan. Best experimental conditions for achieving desulfation of κ-carrageenan - in terms of low sulfate content, high recovery and low degradation of the product - were found. In addition, the complete assignment of the 1H NMR spectrum of β-carrageenan was achieved by means of 1D and 2D NMR techniques. © 2004 Elsevier Ltd. All rights reserved.

Registro:

Documento: Artículo
Título:Desulfation of sulfated galactans with chlorotrimethylsilane. Characterization of β-carrageenan by 1H NMR spectroscopy
Autor:Kolender, A.A.; Matulewicz, M.C.
Filiación:Depto. de Quím. Orgán., CIHIDECAR-CONICET, Pabellón 2 - Cd. Univ., 1428 Buenos Aires, Argentina
Natl. Research Council of Argentina, Argentina
Palabras clave:β-Carrageenan; κ-Carrageenan; Agarans; Desulfation method; Sulfated galactans; Desulfation method; High recovery; Degradation; Nuclear magnetic resonance spectroscopy; Organic compounds; Polysaccharides; Reaction kinetics; Sulfur; agar; carrageenan; chlorotrimethylsilane; galactan; galactose; polysaccharide; pyridinium derivative; sulfate; article; carbon nuclear magnetic resonance; degradation; nonhuman; priority journal; proton nuclear magnetic resonance; sulfation; Carrageenan; Galactans; Molecular Weight; Nuclear Magnetic Resonance, Biomolecular; Sulfuric Acid Esters; Temperature; Time Factors; Trimethylsilyl Compounds
Año:2004
Volumen:339
Número:9
Página de inicio:1619
Página de fin:1629
DOI: http://dx.doi.org/10.1016/j.carres.2004.03.029
Título revista:Carbohydrate Research
Título revista abreviado:Carbohydr. Res.
ISSN:00086215
CODEN:CRBRA
CAS:agar, 9002-18-0; carrageenan, 9000-07-1, 9049-05-2, 9061-82-9, 9064-57-7; chlorotrimethylsilane, 127290-36-2, 36642-33-8, 75-77-4; galactan, 39300-87-3, 9037-55-2; galactose, 26566-61-0, 50855-33-9, 59-23-4; sulfate, 14808-79-8; Carrageenan, 9000-07-1; Galactans; Sulfuric Acid Esters; Trimethylsilyl Compounds; trimethylchlorosilane, 75-77-4
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00086215_v339_n9_p1619_Kolender

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Citas:

---------- APA ----------
Kolender, A.A. & Matulewicz, M.C. (2004) . Desulfation of sulfated galactans with chlorotrimethylsilane. Characterization of β-carrageenan by 1H NMR spectroscopy. Carbohydrate Research, 339(9), 1619-1629.
http://dx.doi.org/10.1016/j.carres.2004.03.029
---------- CHICAGO ----------
Kolender, A.A., Matulewicz, M.C. "Desulfation of sulfated galactans with chlorotrimethylsilane. Characterization of β-carrageenan by 1H NMR spectroscopy" . Carbohydrate Research 339, no. 9 (2004) : 1619-1629.
http://dx.doi.org/10.1016/j.carres.2004.03.029
---------- MLA ----------
Kolender, A.A., Matulewicz, M.C. "Desulfation of sulfated galactans with chlorotrimethylsilane. Characterization of β-carrageenan by 1H NMR spectroscopy" . Carbohydrate Research, vol. 339, no. 9, 2004, pp. 1619-1629.
http://dx.doi.org/10.1016/j.carres.2004.03.029
---------- VANCOUVER ----------
Kolender, A.A., Matulewicz, M.C. Desulfation of sulfated galactans with chlorotrimethylsilane. Characterization of β-carrageenan by 1H NMR spectroscopy. Carbohydr. Res. 2004;339(9):1619-1629.
http://dx.doi.org/10.1016/j.carres.2004.03.029