Showing papers in "Carbohydrate Polymers in 2006"

TL;DR: In this paper, the antimicrobial mechanism of dissolved water-insoluble chitosan was hypothesized as forming an impervious layer around the cell, and the results suggest that optimum chitusan as food preservative should be water-incoverage from mild depolymerization.

TL;DR: In this paper, it was found that polymer nanofibers containing Ag nanoparticles on their surface could be produced by UV irradiation of polymer nanopibers electrospun with small amounts of silver nitrate (AgNO3).

TL;DR: The influence of the pH and stoichiometry relationship between polyelectrolytes providing individual particles with a nano-scale size was assessed by photon correlation spectroscopy (PCS) and scanning electron microscopy (SEM) as discussed by the authors.

TL;DR: In this article, the effect of antimicrobial activities of chitosan and acetic acid against Escherichia coli was investigated by the method of Acetic acid hydrolysis, and the mechanism of antibacterial activity was that E. coli was flocculated.

TL;DR: Chitin and chitosan were extracted from silkworm chrysalides and used for the production of a high purity and porous chiton, as observed by scanning electron microscopy (SEM) as discussed by the authors.

TL;DR: In this paper, a graft copolymerization of acrylamide (AM)/itaconic acid (IA) onto cassava starch via a redox initiator system of ammonium persulfate (APS) and N,N,N 0,N 0 -tetramethylethylenediamine (TEMED), in the presence of N, N 0 -methylenebisacrylamides (N-MBA) crosslinking agent, sodium bicarbonate foaming agent, a triblock copolymers of polyoxyethyl

TL;DR: Sago pulp (57% w/w) isolated from sago waste was converted to carboxymethyl cellulose (CMC) by etherification using sodium monochloroacetate and sodium hydroxide as mentioned in this paper.

TL;DR: In this article, the protonation constants of chitosans with different molecular weight (Mw) and degree of deacetylation were demonstrated by the modified Henderson-Hasselbalch model and Hogfeldt's three-parameter model.

TL;DR: In this article, a semi-interpenetrating polymer network (IPN) microspheres of natural polymers, viz., gelatin and sodium carboxymethyl cellulose (NaCMC), were prepared by using glutaraldehyde (GA) as a crosslinker.

TL;DR: The chitosans show high activities against all bacteria, yeast and filamentous fungus and suppressed fungal colony growth and inhibited fungal spore germination at 0.01% (w/v) concentration.

TL;DR: The role of non-carbohydrate surface components of granular starch in determining gelatinization behavior has been tested by treatment of native starches with a range of extractants as discussed by the authors.

TL;DR: In this paper, the authors found that starch and zein protein are soluble at 80°C in ionic liquids such as 1-butyl-3-methylimidazolium chloride (BMIMCl) and BMIMdca in concentrations up to 10% (w/w).

TL;DR: A series of environmentally friendly glycerol plasticized starch (PS) biocomposites were successfully prepared, using ramie cellulose nanocrystalites (RN) of 0-40% as fillers as mentioned in this paper.

TL;DR: Gelatinization behaviours of cornstarch with different amylose/amylopectin content (waxy: 0/100, maize: 23/77, Gelose 50: 50/50 and Gelose 80: 80/20) were systematically studied by DSC using stainless steel high pressure pan as functions of water content (9-75%) and temperature (0-200 °C) as discussed by the authors.

TL;DR: In this paper, chitosan-coated cassava starch films were prepared and X-ray patterns of the coated dry film showed that the reflection of B-type starch crystalline shifted to slightly higher degrees at about 17.2° (2θ).

TL;DR: In this article, the effect of type and amount of plasticizer on the mechanical, thermal and water-absorption properties of melt-processed thermoplastic starch was investigated.

TL;DR: In this article, the structural effects of various hydrothermal treatments were examined with differential scanning calorimetry (DSC), wide-angle X-ray diffraction (WAXD), and small-angle x-ray scattering (SAXS).

TL;DR: In this article, the authors developed pH-sensitive interpenetrating polymeric network (IPN) microgels (MGs) based on chitosan, acrylamide-grafted-poly(vinyl alcohol) and hydrolyzed acryl-glutaraldehyde grafted polymer (GGP) that are crosslinked with glutaraldehyde and used in the controlled release of cefadroxil, an antibiotic drug.

TL;DR: In this paper, the analysis of the thermal and mechanical behavior of processed biocomposites (biodegradable composites) has been focused on the analysis and characterization of the matrix matrix, a polybutylene adipate-co-terephthalate (POCT) copolyester matrix.

TL;DR: In this paper, the effect of process conditions on the extent of modification of starches by using n -octenyl succinic anhydride (n -OSA) is evaluated on the basis of degree of substitution (DS).

TL;DR: In this article, the interaction between urea/ethanolamine and starch was investigated using Fourier Transform Infrared (FT-IR) and Differential scanning calorimetry (DSC).

TL;DR: In this article, the pore size distribution during the drying of cellulose fibers was determined using differential scanning calorimetry (DSC) with an isothermal step melting procedure.

TL;DR: In this paper, a superabsorbent hydrogel composed of carboxymethylcellulose (CMC) and sodium alginate (Na-Alg) was prepared by using methylenebisacrylamide (MBA) as a crosslinking agent.

TL;DR: In this paper, the 2,2,6,6-tetramethylpiperidine-1-oxy radial (TEMPO)-mediated oxidation was applied to aqueous suspensions of cotton linters, ramie and spruce holocellulose at pH 10.5, and water-insoluble fractions of the TEMPO-oxidized celluloses collected by filtration with water were analyzed by optical and transmission electron microscopy.

TL;DR: E. cava was the most potent anticoagulant inhibitor of the seven species and strongly interferes with coagulation cascade by inhibiting biological activity of serine proteases II, X and VII.

TL;DR: In this article, different methods of CD grafting onto chitosan are discussed, and the inclusion ability and the controlled release properties of CD grafted CHS derivatives and their mechanisms of host-guest complexation with organic molecules are reviewed.

TL;DR: The interaction of polyphenolic compounds (PPCs) present in olive leaf extract (OLE) in chitosan micropsheres was carried out by a spray-drying process as discussed by the authors.

TL;DR: External gelation is the preferred method in producing cross-linked alginate for coating and encapsulation purposes and it produced thinner films with smoother surface, greater matrix strength, stiffness and permeability than internally cross- linked films.

TL;DR: In this article, a high purity wheat β-d -glucan (91.58%) was obtained from white wheat bran after alkali extraction and multi-precipitation with ammonium sulphate compared to previous reported purity of only 70%.

TL;DR: In this paper, composite films from chitosan and poly(lactic acid) (PLA) were prepared by solution mixing and a film casting procedure, and the main objectives of this study were the elaboration and the characterization of CHITOSAN/PLA based bio-packaging for potential food applications and the study of antifungal activity of coatings and films on three mycotoxinogen fungal strains.