Showing papers in "Biomacromolecules in 2008"

TL;DR: Wood nanofibrils are used to prepare porous cellulose nanopaper of remarkably high toughness and the large strain-to-failure means that mechanisms, such as interfibril slippage, also contributes to inelastic deformation in addition to deformation of the nan ofibrils themselves.

TL;DR: The shape and size distribution of crystalline nanoparticles resulting from the sulfuric acid hydrolysis of cellulose from cotton, Avicel, and tunicate were investigated using transmission electron microscopy and atomic force microscopy as well as small- and wide-angle X-ray scattering.

TL;DR: The zwitterionic polymer surface based on carboxybetaine methacrylate (CBMA) also incorporates functional groups for protein immobilization in the nonfouling background, making it a strong candidate for many applications such as in diagnostics and drug delivery.

TL;DR: It is demonstrated that electrostatic attraction forces between chitosan and gastric mucin can be suppressed in the presence of 0.2 mol/L sodium chloride; however, this does not prevent the aggregation of mucin particles in the absence of this biopolymer.

TL;DR: Fluorescence quenching showed that curcumin molecules quench the intrinsic fluorescence of caseins upon binding, and the utility of CMs as carriers ofCurcumin was evaluated by using in vitro cultured HeLa cells.

TL;DR: Hemicelluloses act as inhibitors of the coalescence of microfibrils during drying and facilitate the nanofibrillation of once-dried pulp, contributing to reduction of thermal expansion and enhancement of mechanical properties in the composites.

TL;DR: This review summarizes the results of past research on films and coatings from hemicelluloses, biopolymers that are as yet relatively unexploited commercially and fundamental studies of films from modified hemiceLLuloses have identified other potential applications, including selective membranes.

TL;DR: The potential use of the CECS/PVA electrospun fiber mats as scaffolding materials for skin regeneration was evaluated in vitro using mouse fibroblasts (L929) as reference cell lines and results showed that fibrous mats were good in promoting the cell attachment and proliferation.

TL;DR: In this article, the interaction of resveratrol with beta-lactoglobulin was investigated using circular dichroism, fluorescence and UV-vis absorbance, and the binding constant for the 2-way interaction was found to be between 10(4 and 10(6) M (-1), as determined by protein or polyphenol fluorescence.

TL;DR: Observations indicate that cationic nanoparticles, in addition to their potential for drug delivery to epithelia, may be promising carriers for transcytosing drugs to the blood stream.

TL;DR: It is supposed that highly porous electrospun fibrous scaffolds could be constructed by this elaboration and may be used for skin tissue engineering.

TL;DR: These new surface nanopatterned, bioactive silk protein-based material systems offer a unique combination of features potentially useful for a range of biosensor needs, particularly when considered in concert with the remarkable mechanical properties of these proteins, their biocompatibility, and controllable biodegradation.

TL;DR: Compared to unmodified nanoparticles, the grafting of PCL chains on the surface results in lower modulus values but significantly higher strain at break, which clearly reflects the originality of the reinforcing phenomenon of polysaccharide nanocrystals resulting from the formation of a percolating network thanks to chain entanglements and cocrystallization.

TL;DR: In this article, a review of potential bioresponsive molecular components that can be incorporated into (and/or released from) biomaterial surfaces to obtain accelerated in situ endothelialization of vascular grafts is presented.

TL;DR: Novel environmentally friendly biobased SPU materials with promising applications as decorative and protective coatings are reported, addressing concerns regarding gelation and higher cross-linking caused by the high functionality of vegetable-oil-based polyols.

TL;DR: Chitin nanocrystals dispersed in water were successfully prepared by 2,2,6,6-tetramethylpiperidine-1-oxyl radical (TEMPO) mediated oxidation of alpha-chitin in water at pH 10 under specific conditions, followed by ultrasonic treatment.

TL;DR: The nonlinear trend of the different parameters obtained from FTIR analysis and DSC curves of both SF/keratin systems indicate that when proteins are mixed they do not follow additives rules but are able to establish intermolecular interactions.

TL;DR: The PDMAEMA-grafted cellulose fiber with the highest degree of quaternization and quaternized with the shortest alkyl chains was found to exhibit particularly high activity against E. coli.

TL;DR: The comprehensive application of green chemistry principles were demonstrated in the preparation of CASN and CASN/GPS composites and it was revealed that CASN was dispersed evenly in the GPS matrix.

TL;DR: New highly porous pure cellulose aerogel-like material called "aerocellulose" was prepared from aqueous cellulose/NaOH solutions, then cellulose was regenerated and dried in supercritical conditions using CO2 to obtain shaped three-dimensional objects.

TL;DR: A procedure for preparing individualized chitin nanofibers 3-4 nm in cross-sectional width and at least a few microns in length was developed and the original crystal structure of beta-chitin is maintained, although crystallinity index decreases from 0.51 to 0.37 as a result of the nanofiber conversion.

TL;DR: The formation of complexes between SDS and the various protein aggregates at pH 3.0 was shown to occur by two main mechanisms: at low concentration of SDS, the complex formation occurs essentially by ionic binding between the positive residues of the protein and the negative sulfate heads of the surfactant.

TL;DR: Results show that most of these surfaces exhibit high protein resistance in a wide range of ionic strengths and are more effective than zwitterionic self-assembled monolayers.

TL;DR: The results showed the drug-loaded nanoparticles exhibited enhanced cell inhibition because folate targeting increased the cytotoxicity of drug- loaded nanoparticles against folate receptor expressing tumor cells.

TL;DR: This biodegradable and electroactive PLAAP copolymer possessed the properties in favor of the long-time application in vivo as nerve repair scaffold materials in tissue engineering.

TL;DR: Sponges' intrinsic properties and biological results suggest that CSG sponges may be potential candidates for cartilage tissue engineering strategies, and the cytotoxicity of CSG sponge extracts is investigated.

TL;DR: Electrospinning of pure chitosan was hindered by its limited solubility in aqueous acids and high degree of inter- and intrachain hydrogen bonding, and surface properties of fiber mats were determined by measuring the binding efficiency of toxic heavy metal ions like chromium, and they were found to be related with fiber composition and structure.

TL;DR: The proteinaceous material present in beta-lactoglobulin fibrils formed after heating (20 h at 85 degrees C) at pH 2 was identified and explained for the hydrophobicity, low charge, charge distribution, and capacity to form beta-sheets.

TL;DR: The biological results showed that the hydrogel coating exhibited excellent antifouling properties with respect to settlement and removal, with the degradation process was slow under the test conditions chosen and the coating thickness and composition changing only marginally over the period.

TL;DR: The quaternized cellulose derivatives prepared in NaOH/urea aqueous solutions could be considered as promising nonviral gene carriers and the results of gel retardation assay suggested that QCs could condense DNA efficiently.