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Abstract:

The rate of alkaline cyclization of porphyran is of the same order as those of carrageenan model compounds containing non-sulfated beta-D-galactose units. These units show that the cyclization of the alpha-galactosyl units does not depend on the beta-D-adjacent sugar residues when they carry no sulfate groups. These suggest that there is no influence of the alpha-D-galactose 2-sulfate on the cyclization rate, in spite of its change from the equatorial to the axial position during the conversion of the 4C1 to 1C4 chair conformation.

Registro:

Documento: Artículo
Título:Alkali modification of carrageenans. Part IV. Porphyrans as model compounds
Autor:Noseda, M.D.; Viana, A.G.; Duarte, M.E.R.; Cerezo, A.S.
Ciudad:Exeter
Filiación:Departamento de Bioquímica, Univ. Fed. Do Parana, P.O. B., Parana, Brazil
Depto. Quim. Organ. (CIHIDECAR-C., Fac. Cie. Exact. Y Nat., P., Buenos Aires, Argentina
Palabras clave:Alkalinity; Conformations; Nuclear magnetic resonance spectroscopy; Seaweed; Sugars; Alkaline cyclization; Carrageenans; Porphyran; Polysaccharides; algae
Año:2000
Volumen:42
Número:3
Página de inicio:301
Página de fin:305
DOI: http://dx.doi.org/10.1016/S0144-8617(99)00176-9
Título revista:Carbohydrate Polymers
Título revista abreviado:Carbohydr Polym
ISSN:01448617
CODEN:CAPOD
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_01448617_v42_n3_p301_Noseda

Referencias:

  • Brasch, D.J., Chang, H.M., Chuah, C.T., Melton, L.D., The galactan sulfate from the edible, red alga Porphyra columbina (1981) Carbohydrate Research, 97, pp. 113-125
  • Ciancia, M., Noseda, M.D., Matulewicz, M.C., Cerezo, A.S., Alkali-modification of carrageenans: Mechanism and kinetics in the kappa/iota, mu/nu- And lambda-series (1993) Carbohydrate Polymers, 20, pp. 95-98
  • Ciucanu, I., Kerek, F., A simple and rapid method for the permethylation of carbohydrates (1984) Carbohydrate Research, 131, pp. 209-217
  • Eliel, E.L., Allinger, N.L., Angyal, S.J., Morrison, G.A., (1981) Conformational Analysis, , Washington, DC: American Chemical Society
  • Morrice, L.M., McLean, M.W., Long, W.F., Williamson, F.B., Porphyran primary structure. An investigation using β-agarase I from Pseudomonas atlantica and 13C-NMR spectroscopy (1983) European Journal of Biochemistry, 133, pp. 673-684
  • Noseda, M.D., Cerezo, A.S., Alkali modification of carrageenans-II. The cyclization of model compounds containing non-sulfated β-D-galactose units (1995) Carbohydrate Polymers, 26, pp. 1-3
  • Peat, S., Turvey, J.R., Rees, D.A., Carbohydrates of the red alga, Porphyra umbilicalis (1961) Journal of the Chemical Society, pp. 1590-1595
  • Stevenson, T.T., Furneaux, R.H., Chemical methods for the analysis of sulfated galactans from red algae (1991) Carbohydrate Research, 210, pp. 277-298
  • Stortz, C.A., Cerezo, A.S., The systems of carrageenans from the cystocarpic and tetrasporic stages from Iridaea undulosa: Fractionation with potassium chloride and methylation analysis of the fractions (1993) Carbohydrate Research, 242, pp. 217-227
  • Villarroel, L.H., Zanlungo, A.B., Structural studies on the porphyran from Porphyra columbina (Montagne) (1981) Carbohydrate Research, 88, pp. 139-145
  • Yaphe, W., Colorimetric determination of 3,6-anhydrogalactose and galactose in marine algal polysaccharides (1960) Analytical Chemistry, 32, pp. 1327-1330

Citas:

---------- APA ----------
Noseda, M.D., Viana, A.G., Duarte, M.E.R. & Cerezo, A.S. (2000) . Alkali modification of carrageenans. Part IV. Porphyrans as model compounds. Carbohydrate Polymers, 42(3), 301-305.
http://dx.doi.org/10.1016/S0144-8617(99)00176-9
---------- CHICAGO ----------
Noseda, M.D., Viana, A.G., Duarte, M.E.R., Cerezo, A.S. "Alkali modification of carrageenans. Part IV. Porphyrans as model compounds" . Carbohydrate Polymers 42, no. 3 (2000) : 301-305.
http://dx.doi.org/10.1016/S0144-8617(99)00176-9
---------- MLA ----------
Noseda, M.D., Viana, A.G., Duarte, M.E.R., Cerezo, A.S. "Alkali modification of carrageenans. Part IV. Porphyrans as model compounds" . Carbohydrate Polymers, vol. 42, no. 3, 2000, pp. 301-305.
http://dx.doi.org/10.1016/S0144-8617(99)00176-9
---------- VANCOUVER ----------
Noseda, M.D., Viana, A.G., Duarte, M.E.R., Cerezo, A.S. Alkali modification of carrageenans. Part IV. Porphyrans as model compounds. Carbohydr Polym. 2000;42(3):301-305.
http://dx.doi.org/10.1016/S0144-8617(99)00176-9