The galactomannan system from the endosperm of the seed of Gleditsia triacanthos
The galactomannan system from the endosperm of the seed of Gleditsia triacanthos is composed of four water-soluble galactomannans having a narrow range of distribution of sugar compositions. Nevertheless, molecular-weight and possible chain-distribution heterodispersion were observed. All of the gal...
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1984
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100 | 1 | |a Manzi, A.E. | |
245 | 1 | 4 | |a The galactomannan system from the endosperm of the seed of Gleditsia triacanthos |
260 | |c 1984 | ||
270 | 1 | 0 | |m Cerezo, A.S.; Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon 2, 1428 Buenos Aires, Argentina |
506 | |2 openaire |e Política editorial | ||
504 | |a Dea, Morrison, (1975) Adv. Carbohydr. Chem. Biochem., 31, pp. 241-312. , and references cited therein | ||
504 | |a Mazzini, Cerezo, (1982) An. Asoc. Quím. Argent., 70, pp. 289-294 | ||
504 | |a Leschziner, Cerezo, (1970) Carbohydr. Res., 15, pp. 291-299 | ||
504 | |a Mazzini, (1977) Ph. D. Thesis, p. 58. , Universidad de Buenos Aires, Facultad de Ciencias Exactas y Naturales | ||
504 | |a Mazzini, Cerezo, The carbohydrate and protein composition of the endosperm, embryo and testa of the seed ofGleditsia triacanthos (1979) Journal of the Science of Food and Agriculture, 30, pp. 881-891 | ||
504 | |a Mazzini, Cerezo, (1979) Rev. Latinoam. Quím., 10, pp. 157-160 | ||
504 | |a Mazzini, Cerezo, (1982) Rev. Latinoam. Quím., 13, pp. 52-56 | ||
504 | |a Reinhold, (1972) Methods Enzymol., 25, pp. 244-249 | ||
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504 | |a A.S. Cerezo, unpublished results; Kapoor, Mukherjee, Galactomannan fromCassiaabsusseed. I. Nature of sugars present, methylation, and periodate oxidation studies (1969) Canadian Journal of Chemistry, 47, pp. 2883-2887 | ||
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520 | 3 | |a The galactomannan system from the endosperm of the seed of Gleditsia triacanthos is composed of four water-soluble galactomannans having a narrow range of distribution of sugar compositions. Nevertheless, molecular-weight and possible chain-distribution heterodispersion were observed. All of the galactomannan fractions obtained by fractional extraction and further stepwise precipitation with ethanol contained small proportions of xylose and arabinose, and their methylation analysis suggests that minor amounts of lateral chains are ended by arabinofuranose or xylopyranose residues. The variation of the rotations of the galactomannan fractions in solvents of increasing chaotropic power agrees with the suggestion that, in aqueous solution, these molecules exist in an extended, ribbon-like conformation. These entropically unfavorable conformations would be promoted by the spontaneous, noncovalent, and ordered binding of the molecules, producing lower free-energy aggregates; further interactions between these aggregates form gel networks that are maintained in solution by the galactose lateral chains. Methylation analysis shows that the galactomannans have the structure accepted for these polysaccharides. Only minor deviations from this structure were found, but even if they have minor importance as far as the primary structure of the polysaccharide is concerned, they could be important in determining the secondary and tertiary structures and, consequently, in the formation of aggregates and gel networks. © 1984. |l eng | |
536 | |a Detalles de la financiación: This work was supportedb y a grant from the Consejo National de Inves-tigacionesC ientificasy Ttcnicas. The authorsa re indebtedt o Dr. J. Kavka for recordings omeo f the g.l.c.-masss pectraa, nd to UMYh4FOR (FCEyh’-CONICET) for technicaal ssistance. | ||
593 | |a Departamento de Química Orgánica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Ciudad Universitaria, Pabellon 2, 1428 Buenos Aires, Argentina | ||
700 | 1 | |a Mazzini, M.N. | |
700 | 1 | |a Cerezo, A.S. | |
773 | 0 | |d 1984 |g v. 125 |h pp. 127-143 |k n. 1 |p Carbohydr. Res. |x 00086215 |w (AR-BaUEN)CENRE-301 |t Carbohydrate Research | |
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