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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Manzi, Adriana Elba, Cerezo, Alberto Saúl
Publicado: 1986
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00086215_v148_n2_p189_Manzi
http://hdl.handle.net/20.500.12110/paper_00086215_v148_n2_p189_Manzi
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_00086215_v148_n2_p189_Manzi
record_format dspace
spelling paper:paper_00086215_v148_n2_p189_Manzi2023-06-08T14:32:15Z High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans Manzi, Adriana Elba Cerezo, Alberto Saúl 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. 1986 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00086215_v148_n2_p189_Manzi 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.
author Manzi, Adriana Elba
Cerezo, Alberto Saúl
spellingShingle Manzi, Adriana Elba
Cerezo, Alberto Saúl
High resolution 13C-N.M.R. spectroscopy of legume-seed galactomannans
author_facet Manzi, Adriana Elba
Cerezo, Alberto Saúl
author_sort Manzi, Adriana Elba
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
publishDate 1986
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00086215_v148_n2_p189_Manzi
http://hdl.handle.net/20.500.12110/paper_00086215_v148_n2_p189_Manzi
work_keys_str_mv AT manziadrianaelba highresolution13cnmrspectroscopyoflegumeseedgalactomannans
AT cerezoalbertosaul highresolution13cnmrspectroscopyoflegumeseedgalactomannans
_version_ 1768542719334940672

Ejemplares similares