Showing papers in "Carbohydrate Research in 1987"

TL;DR: In this paper, the Raman microprobe was used to study the vibrational spectra of celluloses and to identify hydrogen motions in deuterated celluloses, which aided in the interpretation of vibrational spectrum of cellulose.

TL;DR: In this paper, the multigram preparation of malto-oligosaccharides of average d.p. ∼11, by the debranching of glycogen using Cytophaga isoamylase is described.

TL;DR: In this paper, a methode de stabilisation de la couleur du complexe amylose-iode, prealable au dosage colorimetrique (635 nm), is presented.

TL;DR: A range of physical and chemical techniques, including viscometry, rheological measurements, dilatometry, turbidity measurements, X-ray diffraction, and differential scanning calorimetry, has been used to study the gelation of amylopectin this article.

TL;DR: The amylopectins from the apparent low (japonica) and high-amylose (indica) varieties of rice showed, respectively, low (0.39-0.87 g/100 g) affinities for iodine, average chain-lengths ( c.l.

TL;DR: The regioselectivity of glycosidase-catalysed formation of disaccharides can be changed by using alpha- or beta-glycosyl acceptors with various aglycons, and an alpha-D-galactosidase can be induced to catalyse the formation mainly of alpha-(1----2)-, alpha-3, or alpha-1----6)-linked digalactosides.

TL;DR: Experimental data suggest that the most likely model for gels consists of a galactomannan solution contained within a carrageenan or furcellaran network, and Gelation has been taken to involve an interaction of the cellulosic backbone of xanthan and the mannan backbone of the galactOMannan.

TL;DR: In this article, the results of potato phosphorylase-based synthesis of linear, star-, and comb-shaped polymers carrying amylose chains of uniform length were reported.

TL;DR: The synthesis of the methyl α-glycoside of the pentasaccharide which represents the sequence in heparin responsible for binding and activation of the anticoagulant protein Antithrombin II was obtained in a yield much better than that of the previously synthesised pentasACcharide and exhibited the same biological properties.

TL;DR: These data showed three chemically different dermatan sulfates (two of which were preponderant) and N-deacetylation of HA and DS35 of the oldest group of women's skin and a new band at 1560 cm-1 of the youngest group.

TL;DR: The neopentylamine adducts were already detectable after one week of incubation, but rapid acid and alkaline degradation explains the lack of detection in body proteins.

TL;DR: Described are total syntheses of O-[sodium (5-acetamido-3,5-dideoxy-D -glycero-alpha-D-galactopyranosyl) onate, and O-benzoyl-2-N-tetracosanoylsphingenine as a key glycosyl acceptor.

TL;DR: In this article, the retrogradation kinetics for waxy-corn starch-water and potato starchwater systems were monitored by rapid-scanning, Raman spectroscopy, and the spectra showed that bands in the 480-cm −1 skeletal-mode region and the 2900-cm−1 C-H stretching-mode regions are sensitive to the retro degradation process.

TL;DR: In this article, the authors used dilute aqueous solutions of the extracellular polysaccharides from Pseudomonas elodea (S-60), Alcaligenes (ATCC 31555), S-130, and Alcaligens (atCC 31961), and S-194 over a range of ionic strength (Me4NCl concentrations) and temperature.

TL;DR: The total synthesis of O-β-d -galactopyranosyl-(1→4)-O-[α- l -fucopyranoyl]-(1→3)]-O-(2-acetamido-2-deoxy)-β- d -gucopyranosylon)-( 1→3)-O-β -d -Galacto-polygonal-polymorphic-polycyclic-cyclohexyl-( 1→1)-2-N-tetracosanoyl-(2S,3

TL;DR: The covalently bound, highly immunogenic arabinogalactan of mycobacteria, and presumably of other actinomycetes, is highly unusual, in that all of the glycosyl residues are in the furanoid form.

TL;DR: In this article, the cell-wall material from beeswing wheat bran was sequentially extracted with 0.05 m NaOH at 2° and 4 m KOH at 20° to leave the α-cellulose residue which contained a significant amount of arabinoxylan.

TL;DR: Re-methylation of methylated and LiAlH4-reduced gangliosides gave a new derivative that was useful for the analysis of gangliosisides by mass spectrometry.

TL;DR: Four n.m.r.s. methods that are especially useful for characterization of oligosaccharides are applied to the trisaccharide alpha-Neu5Ac-(2----3)-beta-Gal-(1----4)-Glc (1), providing chemical-shift correlation maps having much higher sensitivity than was previously possible.

TL;DR: In this article, the chemical shifts and multiplicities of the resonances in high-resolution, 13C-c.m.a.s. spectra of cyclomalto-oligosaccharide inclusion complexes are characteristic of the crystalline structure of different complexes.

TL;DR: In this paper, a heteroxylan isolated from the pericarp (beeswing bran) of wheat kernel and purified is shown to be a highly substituted glucuronoarabinoxylan in which 80% of the β-d-xylosyl residues carry one or two substituents.

TL;DR: The results obtained with model derivatives of d -galactopyranuronic acid bring deeper insight into the formation of chelates of Cu2+ and Pb2+ ions with mono-and oligo-d-galactosyluronates.

TL;DR: Stereoselective, total synthesis of O-alpha-D-galactopyranosyl-(1----4) -O-beta-D (and beta)-D-glucopyranusyl(1----1)-N-tetracosanoyl-(2S,3R,4E)-sphin gen ine was achieved by using O.

TL;DR: In this article, light-scattering and viscosity measurements were made on five sonicated samples of sodium xanthan in 0.01M aqueous NaCl at 25 and 80°, temperatures at which the polysaccharide is known to take on certain ordered and disordered conformations, respectively.

TL;DR: Laser light-scattering spectrometry was used to study the molecular weights of several chitosans, N -(carboxymethyl)chitosan, glycol N -carboxy-methyl)chitsan, and N -Carboxyethylchitosa 6-sulfate.

TL;DR: The side-chain structures suggest that there are four or more distinct families of side chains attached to the backbone of rhamnogalacturonan I.

TL;DR: In this paper, the spectra of water-dimethyl sulfoxide mixtures were analyzed for a variety of starches, ranging in composition from high-amylopectin to highamylose types, and the relative intensities of these signals, and of the resonances due to the corresponding nuclei of main-chain residues, were evaluated in terms of the incidence of end groups or branches, in the starches.