Showing papers in "Carbohydrate Research in 2004"

TL;DR: Results show that chitosan nanoparticles and copper-loaded nanoparticles could inhibit the growth of various bacteria tested and exposed to S. choleraesuis led to the disruption of cell membranes and the leakage of cytoplasm.

TL;DR: The results illustrated the formation of gold and silver nanoparticles inside the nanoscopic polysaccharide templates as well as the morphology and size distribution of prepared gold andSilver nanoparticles varied with the concentration of both thepolysaccharides and the precursor metal salts.

TL;DR: The fiber-reactive chitosan derivative, O-acrylamidomethyl- HTCC (NMA-HTCC), showed complete bacterial reduction within 20 min at the concentration of 10ppm, when contacted with Staphylococcus aureus and Escherichia coli.

TL;DR: In this work, dynamic FT-IR spectroscopy has been further explored as a method sensitive to cellulose structure variations and had the potential to indicate possible correlation field splitting peaks of cellulose Ibeta.

TL;DR: Important pathways leading to a decrease of the O-content of the liquid reaction products start from the intermediate glyceraldehyde, which forms pyruvaldehyde, which in its turn is converted into formic acid and acetaldehyde.

TL;DR: The physiologically active, gel-forming fraction of the alkali-extractable polysaccharides of Plantago ovata Forsk seed husk and some derived partial hydrolysis products were studied by compositional and methylation analysis and NMR spectroscopy and found to be a neutral arabinoxylan.

TL;DR: A direct relationship was found between the moisture weight gain and the increase in the absorbance peaks for humidities up to 50% relative humidity after which the moisture gain increased faster, a fact that still remains to be explained.

TL;DR: An overview of the latest advances in investigations of the biosynthesis, molecular properties, and associated biological activity of pullulan is presented and future prospects in designing new biologically active derivatives are delineated.

TL;DR: Interestingly, WTC(g) and delta C(p) showed a negative linear correlation, indicating that the change in heat capacity during the glass transition is associated with the strength of the hydrogen-bonding network in the glassy state.

TL;DR: In this paper, the inhibitory effect on carbohydrate hydrolysis of ethanol extracts from more than 1400 species of plants with the aim of identifying a potential antihyperglycemic drug was reported.

TL;DR: A fucoidan fraction consisting of L-fucose, sulfate, and acetate in a molar proportion of 1:1.21:0.08 was isolated from the brown seaweed Fucus distichus collected from the Barents Sea and the 13C NMR spectrum of the fraction was typical of regular polysaccharide repeating units.

TL;DR: F1 treatment increased the total antioxidant capacity and the activity of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px) in aging mice and had significant in vivo antioxidant activity.

TL;DR: The results showed that the water-soluble fraction WSP3 and the EDTA soluble fraction CSP3, consisted of a disaccharide repeating unit, with side chains attached to O-4 of the rhamnosyl residues, which contained highly branched alpha-(1-->5)-linked arabinan and short linear beta-(1 -->4)-linked galactan.

TL;DR: The melting point determination is a sensitive method for the characterization of crystal quality but it cannot be used alone for the identification of sugar samples in all cases, therefore, the melting point method should be validated for different sugars.

TL;DR: The average values of the semi-crystalline growth rings thickness in starches have been determined and the relationship between structural characteristics and thermodynamic melting parameters is discussed.

TL;DR: The results of a comparative study of two thermostable (1-->4)-beta-xylan endoxylanases using a multi-technical approach indicate that a GH11 xylanase is more useful than a GH10 xylan enzyme for the upgrading of wheat bran into soluble oligosaccharides.

TL;DR: Water-soluble O-acetylated galactoglucomannan (GGM) isolated from spruce thermomechanical pulp by hot-water extraction was characterized by 1D and 2D NMR analysis and showed that the distribution of glycosyl residues is random.

TL;DR: It was shown that good water solubility, relatively high chain stiffness, and moderate molecular mass of the derivatives in aqueous solution contribute beneficial to enhancement of antitumor activity.

TL;DR: A heteropolysaccharide obtained from an aqueous extract of dried stem of Dendrobium officinale Kimura and Migo was investigated by chemical techniques and NMR spectroscopy, and is demonstrated to be a 2-O-acetylglucomannan, composed of mannose, glucose, and arabinose in 40.2:8.4:1 molar ratios.

TL;DR: Starch isolated from a hybrid maize was chemically modified by succinylation and acetylation and gave the characteristic A pattern of cereal starches, and modifications reduced starch retrogradation.

TL;DR: A new set of (13)C and (1)H NMR chemical shifts of most common carrageenan types is given relative to DSS as the internal standard according to the IUPAC recommendations.

TL;DR: The results showed that the ultrasonic treatment and sequential extractions with alkali and alkaline peroxide under the conditions given led to a release of over 90% of the original hemicelluloses and lignin.

TL;DR: Results suggest that types A and B fucan sulfate from sea cucumber are potent inhibitors of osteoclastogenesis.

TL;DR: Six polysaccharides were extracted sequentially from the fresh sclerotium of Poria cocos cultivated in China using 0.9% NaCl aqueous solution, and the results indicated that the poly Saccharides PCS1, PCS2, and PCS3-I were heteropolysaccharide containing D-glucose, D-galactose, d-mannose,D-fucOSE, and D-xylose.

TL;DR: In this paper, the B3LYP/6-311++G** level of theory was carried out on 4C1 and 1C4 chairs, (3,O)B and B(3, O) boats, and skew-boat conformations of alpha- and beta-D-glucopyranose.

TL;DR: Observations suggest that the bulk of the spine fibers consists of an intimate composite of cellulose microfibrils embedded in an arabinan matrix.

TL;DR: Alginate that was purified from the fermentation solution of marine bacteria Vibro sp.

TL;DR: The description of occurrence of potential glycosylation sites in pre pro sequences and in mature enzymes as well as important amino acid residues, such as aspartates, cysteines, histidines and other aromatic residues (Tyr, Phe and Trp), are described with discussion of their possible function in the activity of PMEs.

TL;DR: The automatic assignment of carbohydrate structures in PDB entries will improve the cross-linking of glycobiology resources with genomic and proteomic data collections, which will be an important issue of the upcoming glycomics projects.

TL;DR: D-Alanyl acylation of a sugar hydroxyl group seems to be a novel structural feature of teichoic acids from staphylococci.