Showing papers in "Carbohydrate Polymers in 2003"

TL;DR: In this paper, the antimicrobial activity of chitosan of different molecular weights (MW) was investigated, and the effect of the concentration and MW on E. coli and Staphylococcus aureus was investigated.

TL;DR: In this article, the water insolubility of carboxymethyl chitosans at various pHs varied with the degree of the carboxyethylation and the reaction temperature, and the ratio of water/isopropanol in the reaction solvent.

TL;DR: The FT-Raman and FT-IR spectra of polygalacturonic (pectic) acid, potassium pectate and its derivatives, as well as commercial citrus and sugar beet pectins were measured and interpreted as discussed by the authors.

TL;DR: A review of the important area of cellulose degradation under alkaline conditions is presented in this paper, focusing on its relevance to the possible disposal of radioactive wastes in an underground repository in which cement-based waste encapsulation grouts and backfill may be employed.

TL;DR: In this paper, a mineral clay was used as filler in order to improve the mechanical properties of glycerol-plasticized Cara starch films, and the results were characterized by mechanical and dynamic analyses, X-ray diffraction (XRD), thermogravimetry, infrared spectroscopy, and scanning electron microscopy.

TL;DR: In this article, the branching point of konjac glucomannan was determined by methylation analysis and 13C NMR spectroscopy, showing that β-C-1-linked C-6 carbon of glucosyl units were the branching units.

TL;DR: Chitin and chitosan enhanced the release of the platelet derived growth factor-AB (PDGF-AB) and the transforming growth factor -β1(TGF-β1) from the platelets, particularly, more with chitOSan.

TL;DR: This review summarizes the current knowledge on the extent of in vitro hydrolysis of native legumes starches by α-amylases of different origin, the structural and morphological changes that occur in legume starches as a result of α- amylolysis, and the reactivity of amylases towards gelatinized, retrograded and modified legumes.

TL;DR: In this paper, the physicochemical properties of oxidized common and waxy corn starches by different levels of sodium hypochlorite (0.25-3.0% active chlorine based on dry starch weight) were studied.

TL;DR: In this article, a detailed study was carried out on banana, Musa var. valery native and modified starches (gelatinized, phosphorylated, cross-linked, crosslinked phosphorylation and hydroxypropylated).

TL;DR: In this article, the authors used the information of the principal components of the FT-IR spectra in the 1200-800 cm −1 wavenumber region for food additive polysaccharides.

TL;DR: In this article, a series of excellent hydrogels were prepared from polyvinyl alcohol (PVA) and carboxymethylated chitosan with electron beam irradiation (EB) at room temperature.

TL;DR: In this paper, a rotational viscometer for carboxymethyl cellulose (CMC) from sugar beet pulp cellulose was determined using a Turian approach to predict the consistency coefficient, the flow behaviour index and the apparent viscosity as a function of temperature and concentration.

TL;DR: In this paper, a chitosan-polyvinyl alcohol (PVA) blend films were prepared and characterized for mechanical and optical properties using FTIR, and the moisture content increased with increase in PVA concentration.

TL;DR: In this paper, the fine structures, crystallinity and thermal properties were characterized and the rheological properties were evaluated using both compression and dynamic oscillatory tests, showing that acid hydrolysis had little effect on amylopectin branch chain-length distribution, gelatinization and retrogradation properties.

TL;DR: In this article, a collection of wine polysaccharides were fractionated by a combination of anion-exchange, size-exclusion and affinity chromatography steps, which allowed the determination of their intrinsic properties.

TL;DR: In this paper, the effects of heat treatment and dehydration on acemannan, a storage polysaccharide from aloe vera parenchyma, were evaluated and significant changes occurred in related functional properties, such as swelling, water retention capacity, and fat adsorption capacity.

TL;DR: A sensitive and reproducible 96-well assay of uronic acid permitting a rapid processing of a number of samples with a very low consumption of reagents is described for the determination of complex uronic Acid-bearing polyanions such as hyaluronic acid, chondroitin sulfate, dermatan sulfate and heparin.

TL;DR: In this paper, the selectivity coefficients for binding of negative and positive ions to chitosans of different chemical composition have been determined by equilibrium dialysis, and they showed a strong selectivity towards copper (Cu 2+ ) compared to the metal ions zinc (Zn 2+ ), cadmium (Cd 2+ ).

TL;DR: In this paper, a number of highly swelling hydrogels have been prepared by grafting crosslinked polyacrylamide chains onto carboxymethylcellulose (CMC) via a free radical polymerization method.

TL;DR: In this article, two potentiometric titration functions are derived for the determination of deacetylation (DD) of chitosan, and two universal pH regions are proposed for the accurate plotting of different DD chitoan samples.

TL;DR: In this paper, different fractions of water-soluble polysaccharides, all composed mainly of acetyl-galactoglucomannans, from native Norway spruce wood and thermomechanical pulp were isolated and characterised.

TL;DR: In this paper, a procedure was developed for the production of resistant starch type III (RSIII) polymorphs from the same plant source, and applied to three different native starches (high amylose corn starch, wheat starch, cornflour).

TL;DR: In this article, the physicochemical properties of starch during potato growth were characterized by different analytical techniques. And the physicochemic properties of starches were evaluated by X-ray diffraction.

TL;DR: In this article, thermoplastic starch/natural rubber polymer blends were prepared using directly natural latex and cornstarch, with natural rubber content varying from 2.5 to 20%.

TL;DR: Extracellular polymeric substances (EPS) from four filamentous cyanobacteria Microcoleus vaginatus, Scytonema javanicum, Phormidium tenue and Nostoc sp. were investigated for their chemical composition, structure and physical properties.

TL;DR: It was observed that the tensile modulus decreases as the moisture content increases and the mechanical properties of these natural spines were investigated by tensile tests at various conditioning relative humidities.

TL;DR: Graft copolymerization of acrylonitrile and methylmethacrylate onto chitosan using potassium persulfate as an initiator was studied in this article.

TL;DR: A new non-degrading process for the isolation of glucan from yeast cell walls comprising gentle extraction steps and enzymatic treatments without any extreme pH values is developed.

TL;DR: In this paper, the basidio spores of Phanerochaete chryosporium were immobilized in alginate gel beads, and the immobilized spore containing alginates beads were incubated for the growth of fungus.