Showing papers in "Carbohydrate Research in 1997"

TL;DR: In this paper, the A-type and B-type X-ray diffraction patterns of Naegeli dextrins were compared and the results indicated that the Atype starches had branch points scattered in both amorphous and crystalline regions, making them more susceptible to acid hydrolysis.

TL;DR: The spectral behavior of this cellulose form indicates it is a less-ordered or a para-crystalline ‘in core’ structure with a somewhat larger mobility than the crystalline cellulose Iα and Iβ allomorphs.

TL;DR: The results suggest that chitosans are actually mainly depolymerized by lysozyme in human serum, and not by other enzymes or otherdepolymerization mechanisms.

TL;DR: The exopolysaccharide produced by a ropy strain of Pediococcus damnosus in a semi-defined medium was found to be an homopolymer composed of D-glucose.

TL;DR: All glucans investigated, regardless of molar mass and solution structure, stimulate the investigated immunological measures more than a commercially available biomedical drug used for comparison.

TL;DR: In this article, the influence of alkaline concentration, temperature and solution-to-chitin ratio on the N-deacetylation of shrimp chitin was investigated.

TL;DR: The kappa number of chemical pulps is widely used both in mill operation and in laboratory work as a measure of the degree of delignification in pulping, oxygen deformation, and prebleaching as discussed by the authors.

TL;DR: In this article, the formation of chitosan gels in acetic acid-water-propanediol solution was studied by FTIR and 1 H NMR spectroscopy.

TL;DR: Both ionic strength and pH had an effect on their solubility properties, and also on interactions that they exhibited with O-(carboxymethyl)cellulose, xanthan gum, and heparin, and the chitosan derivatives may be useful in some aqueous formulations.

TL;DR: In this paper, the effects of ultrasonic conditions and storage in acidic solution on changes in the molecular weight and polydispersity (molecular weight distribution) of treated chitosan were explored.

TL;DR: Cultivation of Escherichia coli harbouring heterologous genes of oligosaccharide synthesis is presented as a new method for preparing large quantities of high-value oligosACcharides and its utilisation as a precursor for the preparation of synthetic nodulation factors by chemical acylation is tested.

TL;DR: The good correlation between ulvan degradation monitored by reducing-power, UV absorbance and viscosimetry, indicated that the crude enzymatic extract contains essentially an endo-ulvan lyase activity.

TL;DR: Analysis of the oligosaccharides generated by endo-(1-->4)-beta-mannanase digestion confirmed that the GGM comprises a backbone of predominantly alternating 4- and 4,6-Manp, 4-Glcp, terminal Galp and 2-Galp, small amounts and terminal Arap and terminal Xylp, and approximately 0.03 mol acetyl per mol of glucosyl residue.

TL;DR: In this article, the final rate of hydrolysis after 30 h was less than 10% for high-amylose starch lintners, between 20 and 37% for potato and C-type lintner, and greater than 62% for pure A-type Lintners.

TL;DR: In this paper, potato starch was hydrothermally treated at moisture levels ranging from 20 to 40% and at temperatures 3% below the gelatinization peak temperatures (in K), which had a great impact on rheological behavior as studied with a rapid visco analyzer (RVA) and dynamic viscoelastic measurements.

TL;DR: In this paper, the effectiveness of water as a diluent in depressing the melting temperature of amylose crystals was investigated by using the Flory-Huggins theory of polymer solutions.

TL;DR: In this article, the 8-8 and 8-O-4 dehydrodimers were found to reduce the amount of ferulic acid by 78% and 4.9% respectively.

TL;DR: In this article, the state diagram of sucrose-water solutions was constructed by the use of model calculations; the activity coefficient from the UNIQUAC model allowed determination of the solution-ice equilibrium curve and the glass transition temperature as a function of the composition was evaluated from the Gordon-Taylor equation.

TL;DR: In this paper, the atomic force microscope (AFMEM) was used to identify individual macromolecules within a heterogeneous population of tomato pectins from unripe tomato cell walls.

TL;DR: Most of the compounds synthesized have been tested with respect to biological activity (cytostatic, cytotoxic, antimitotic, neurotoxic, antiplatelet, aggregation activity).

TL;DR: In this article, cell-wall polysaccharides from six species of red algae of the genus Callophycus were mainly galactose (Gal) and 3,6-anhydrogalactose(AnGal), and were rich in pyruvate and sulfate.

TL;DR: In this article, the exocyclic oxygen atom at C-1 is oriented gauche to C-O-5, and the effect of the OR group on the C 1-O 5 bond is investigated.

TL;DR: Fucose-branched chondroitin sulfate E was prepared from the body wall of sea cucumber Stichopus japonicus and GC-MS analyses of the resultant partially methylated alditol acetates demonstrated that the fucose branch is formed by two fucopyranosyl residues linked glycosidically through position (1-->3).

TL;DR: The glycosylated Peptide T is synthesized which blocks infection of human T cells by human immunodeficiency virus and was highly stable against proteolysis in comparison to native Peptid T and N-acetylglucosaminyl Peptides T.

TL;DR: The results indicate that the enzyme of Alteromonas sp.

TL;DR: The exocellular polysaccharide of Streptococcus thermophilus OR 901, isolated from partially deproteinised whey, is a heteropolymer of D-galactopyranose and L-rhamnopyrAnose residues in the molar ratio 5:2.

TL;DR: When pectinolytic enzyme preparations are used to process fruits and vegetables, RG-II is released as a main soluble polysaccharide fraction while other pecticpolysaccharides are heavily degraded.

TL;DR: The glucooligosaccharides (GOS), produced by Leuconostoc mesenteroides NRRL B-1299 dextransucrase through an acceptor reaction with maltose and sucrose, were purified by reverse phase chromatography suggesting the existence of at least three families of homologous molecules.

TL;DR: Fibrillation was observed in the residual Halocynthia CC and repeatedly hydrolyzed Cladophora CC that richly contained cellulose Iβ, which may suggest the supermolecular structure of CCs.