High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans

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 spect...

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Autores principales: Manzi, A.E., Cerezo, A.S., Shoolery, J.N.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_00086215_v148_n2_p189_Manzi
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_00086215_v148_n2_p189_Manzi2023-10-03T14:06:21Z High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans Manzi, A.E. Cerezo, A.S. Shoolery, J.N. 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. Fil:Manzi, A.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Cerezo, A.S. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_00086215_v148_n2_p189_Manzi
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description 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.
format JOUR
author Manzi, A.E.
Cerezo, A.S.
Shoolery, J.N.
spellingShingle Manzi, A.E.
Cerezo, A.S.
Shoolery, J.N.
High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans
author_facet Manzi, A.E.
Cerezo, A.S.
Shoolery, J.N.
author_sort Manzi, A.E.
title High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans
title_short High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans
title_full High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans
title_fullStr High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans
title_full_unstemmed High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans
title_sort high resolution 13c-n.m.r. spectroscopy of legume-seed galactomannans
url http://hdl.handle.net/20.500.12110/paper_00086215_v148_n2_p189_Manzi
work_keys_str_mv AT manziae highresolution13cnmrspectroscopyoflegumeseedgalactomannans
AT cerezoas highresolution13cnmrspectroscopyoflegumeseedgalactomannans
AT shooleryjn highresolution13cnmrspectroscopyoflegumeseedgalactomannans
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