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Abstract:

Five galactomannans obtained by aqueous extraction at different temperatures from the endosperm of the seed of Gleditsia triacanthos, and having different Gal:Man ratios, were submitted to a preliminary degradation, and the products analyzed by high resolution 13C-n.m.r. spectroscopy. In these spectra all carbon atoms yield several lines. C-6 (substituted Man) shows, for the first time, a clear splitting, which is explained by considering that this carbon atom is sensitive to whether or not its neighbors are branched; this provides a basis for determining the next-nearest-neighbor probabilities in the galactomannans ("triad frequencies"). Although diad frequencies are roughly consistent with a random arrangement, the values obtained for the triad frequencies indicate a more complex kind of arrangement of the lateral chains. © 1986.

Registro:

Documento: Artículo
Título:High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans
Autor:Manzi, A.E.; Cerezo, A.S.; Shoolery, J.N.
Filiación:Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon 2, 1428 Buenos Aires, Argentina
N.m.r. Applications Laboratory, VARIAN Instrument Group, Palo Alto Division, 611 Hansen Way, Palo Alto, CA 94303-0883, United States
Año:1986
Volumen:148
Número:2
Página de inicio:189
Página de fin:197
DOI: http://dx.doi.org/10.1016/S0008-6215(00)90387-2
Título revista:Carbohydrate Research
Título revista abreviado:Carbohydr. Res.
ISSN:00086215
CODEN:CRBRA
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00086215_v148_n2_p189_Manzi

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Citas:

---------- APA ----------
Manzi, A.E., Cerezo, A.S. & Shoolery, J.N. (1986) . High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans. Carbohydrate Research, 148(2), 189-197.
http://dx.doi.org/10.1016/S0008-6215(00)90387-2
---------- CHICAGO ----------
Manzi, A.E., Cerezo, A.S., Shoolery, J.N. "High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans" . Carbohydrate Research 148, no. 2 (1986) : 189-197.
http://dx.doi.org/10.1016/S0008-6215(00)90387-2
---------- MLA ----------
Manzi, A.E., Cerezo, A.S., Shoolery, J.N. "High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans" . Carbohydrate Research, vol. 148, no. 2, 1986, pp. 189-197.
http://dx.doi.org/10.1016/S0008-6215(00)90387-2
---------- VANCOUVER ----------
Manzi, A.E., Cerezo, A.S., Shoolery, J.N. High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans. Carbohydr. Res. 1986;148(2):189-197.
http://dx.doi.org/10.1016/S0008-6215(00)90387-2