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Matulewicz, M.C.; Cerezo, A.S.; Jarret, R.M.; Syn, N. "High resolution 13C-n.m.r. spectroscopy of 'mixed linkage' xylans" (1992) International Journal of Biological Macromolecules. 14(1):29-32
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Abstract:

Three xylan fractions, obtained by stepwise precipitation with ethanol, were analysed by 75-MHz 13C-n.m.r. spectroscopy. Diad frequencies, determined from the C-2 resonances, show that the (1 → 3)-linkages are interspersed throughout the chain rather than grouped contiguously. This type of distribution is in agreement with a random coil conformation and with the constancy of the optical rotation in solvents of different ionic strength and chaotropic power. These diad frequencies were compared with the theoretical values calculated for a random distribution from the ratio of (1 → 4)-:(1 → 3)-linkages in the 1H-n.m.r. spectra, and from the methylation analysis for one of the fractions. © 1992 Butterworth-Heinemann Limited.

Registro:

Documento: Artículo
Título:High resolution 13C-n.m.r. spectroscopy of 'mixed linkage' xylans
Autor:Matulewicz, M.C.; Cerezo, A.S.; Jarret, R.M.; Syn, N.
Filiación:Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Pabellon 2, Ciudad Universitaria, 1428 Buenos Aires, Argentina
College of the Holy Cross, Department of Chemistry, Worcester, MA 01610, United States
Palabras clave:13C-n.m.r.; diad frequencies; Xylans; carbon; xylan; xylan; article; chemistry; comparative study; conformation; isolation and purification; methodology; nuclear magnetic resonance spectroscopy; optical rotation; seaweed; carbon nuclear magnetic resonance; chemical bond; chemical structure; nonhuman; Carbohydrate Conformation; Carbon Isotopes; Comparative Study; Magnetic Resonance Spectroscopy; Optical Rotation; Seaweed; Support, Non-U.S. Gov't; Xylans
Año:1992
Volumen:14
Número:1
Página de inicio:29
Página de fin:32
DOI: http://dx.doi.org/10.1016/S0141-8130(05)80016-9
Título revista:International Journal of Biological Macromolecules
Título revista abreviado:Int. J. Biol. Macromol.
ISSN:01418130
CODEN:IJBMD
CAS:carbon, 7440-44-0; xylan, 9014-63-5; Carbon Isotopes; Xylans
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01418130_v14_n1_p29_Matulewicz

Referencias:

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Citas:

---------- APA ----------
Matulewicz, M.C., Cerezo, A.S., Jarret, R.M. & Syn, N. (1992) . High resolution 13C-n.m.r. spectroscopy of 'mixed linkage' xylans. International Journal of Biological Macromolecules, 14(1), 29-32.
http://dx.doi.org/10.1016/S0141-8130(05)80016-9
---------- CHICAGO ----------
Matulewicz, M.C., Cerezo, A.S., Jarret, R.M., Syn, N. "High resolution 13C-n.m.r. spectroscopy of 'mixed linkage' xylans" . International Journal of Biological Macromolecules 14, no. 1 (1992) : 29-32.
http://dx.doi.org/10.1016/S0141-8130(05)80016-9
---------- MLA ----------
Matulewicz, M.C., Cerezo, A.S., Jarret, R.M., Syn, N. "High resolution 13C-n.m.r. spectroscopy of 'mixed linkage' xylans" . International Journal of Biological Macromolecules, vol. 14, no. 1, 1992, pp. 29-32.
http://dx.doi.org/10.1016/S0141-8130(05)80016-9
---------- VANCOUVER ----------
Matulewicz, M.C., Cerezo, A.S., Jarret, R.M., Syn, N. High resolution 13C-n.m.r. spectroscopy of 'mixed linkage' xylans. Int. J. Biol. Macromol. 1992;14(1):29-32.
http://dx.doi.org/10.1016/S0141-8130(05)80016-9