Showing papers in "Biomacromolecules in 2002"

TL;DR: The experiments demonstrate that it is possible to tailor subtle mechanical properties into a matrix by controlling fiber orientation, and suggest that electrospun collagen may represent a nearly ideal tissue engineering scaffold.

TL;DR: Aqueous-based electrospining of silk and silk/PEO blends provides potentially useful options for the fabrication of biomaterial scaffolds based on this unique fibrous protein.

TL;DR: The rapid gelation of the HA-DTPH solution under physiological conditions was achieved, which demonstrated the capacity for in situ cell encapsulation, and release of blue dextran from cross-linked films was used as a model for drug release.

TL;DR: In this paper, the authors reported the preparation of linear and branched DOPA-modified poly(ethylene glycol)s (PEG-DOPAs) containing one to four DOPA endgroups.

TL;DR: A new strategy for the synthesis of genes encoding repetitive, protein-based polymers of specified sequence, chain length, and architecture is reported, which is modular and can be used to combine genes encoding different polypeptide sequences.

TL;DR: The endothelial cell culture proved that the cytocompatibility of the aminolyzed PCL was improved slightly regardless of the NH(2) amount on the surface, and the cell attachment and proliferation ratios were obviously improved and the cells showed a similar morphology to those on tissue culture polystyrene.

TL;DR: It was found that the glass-rubber transition temperature of the plasticized amylopectin matrix first increases up a whiskers content around 10-15 wt % and then decreases, and a significant increase in crystallinity was observed in the composites by increasing either moisture content or whisker content.

TL;DR: Protein-graft-poly(ethylene glycol) hydrogels represent a new and versatile class of biomimetic hybrid materials that hold clinical promise in serving as implants to promote wound healing and tissue regeneration.

TL;DR: The plasticizing effect of different polyols such as glycerol, xylitol, sorbitol, and maltitol on waxy maize starch was investigated and good mechanical properties of the moist material were obtained in terms of both stiffness and elongation at break.

TL;DR: Investigation of the rheological behavior of an un-cross-linked ELP, below and above its T(t), and the ability of ELP to promote chondrogenesis in vitro suggest that ELPs demonstrate great potential for use as in situ forming scaffolds for cartilaginous tissue repair.

TL;DR: Results show how cell interactions with polyelectrolyte films can be tuned by the type of the outermost layer, the presence of proteins, and the number of layers in the film.

TL;DR: The evaluation of the platelet compatibility of poly(MEA-co-HEMA) revealed that the adhesion number and the morphological change of platelet on the copolymer surface were least when the HEMA content was 0-20 mol %, which strongly suggest that the freezing bound water relates to the platelets compatibility of the polymers.

TL;DR: A simple and convenient procedure for chemoselectively protecting the amino groups of chitosan has been developed to provide N-phthaloyl-chitOSan that is indispensable as a soluble N-protected precursor for further controlled modification reactions of ch itosan.

TL;DR: These novel water-soluble lipopolymers provided good transfection efficiency with other desirable characteristics such as water solubility, free primary amino groups for efficient DNA condensation and high buffer capacity that indicated the possibility of efficient endosomal release.

TL;DR: Oscillatory rheometry demonstrated that above a block copolymer concentration of approximately 20 wt %, solutions of DOPA-modified PEO-PPO-PEO blockCopolymers exhibited sol-gel transitions upon heating.

TL;DR: Observations of the morphological dependency on blend composition indicate that PLA/PCL blends are immiscible but compatible to some extent and that synergism of compatibilizing may be maximized in the compositional blend ratio before apparent phase separation and coarsening.

TL;DR: A new molecular engineering approach in which a polymer-supported phospholipid bilayer is vertically stabilized by controlled covalent tethering at both the polymer-substrate and polymer-bilayer interfaces leading to a deeper understanding of the complex problem of interlayer coupling.

TL;DR: Structural information essential for understanding the diverse physical properties of heat-induced whey protein gels is provided, including the first direct evidence for the anisotropic shape of these primary particles.

TL;DR: The sol-to-gel transition temperature of polymer mixture aqueous solutions was well described by an empirical equation of miscible blends, indicating miscibility of the two polymer systems in water on the molecular level.

TL;DR: Films of potato starch, amylose, and amylopectin and blends thereof were prepared by solution casting and examined using X-ray diffraction, light microscopy, transmission electron microscope, and differential scanning calorimetry.

TL;DR: It is suggested that the polymer species and/or the assembly conditions are key factors for realizing the alternating bioactivities of films prepared by the layer-by-layer assembly.

TL;DR: The results confirm that electrosorption is the driving force for the adsorption of pectin onto casein micelles.

TL;DR: Nano-organized shells of platelets were demonstrated by transmission electron microscopy and fluorescence microscope images and can have applications in cardiovascular research and targeted drug delivery.

TL;DR: Changes in wheat gluten network structure upon mixing were studied from the biochemical analyses of gluten/glycerol blends mixed at 100 rpm with increasing times and temperatures of regulation to postulated that during mixing, the disulfide interchange reactions are mediated by thiyl radicals in place of free thiol groups.

TL;DR: Polyelectrolyte complex formation of chitosans of varying average molecular weight and degree of acetylation with Chitosan sulfate or poly(styrene sulfonate) was studied by static light scattering in dilute solution at various ionic strengths.

TL;DR: A novel method to accurately determine the carbonyl content in cellulosic materials by fluorescence labeling with carbazole-9-carboxylic acid [2-(2-aminooxyethoxy)ethoxy]amide has been developed and offers the additional advantages of higher efficiency, shortened analysis times, increased simplicity, and widest applicability.

TL;DR: The heterogeneous carbonyl group determination, offering shorter reaction times and increased simplicity as compared to the homogeneous approach, was comprehensively validated and thecarbonyl content in numerous dissolving pulps of different provenience has been determined.

TL;DR: The cross-linking density in both networks was found to be close to theoretical, and the triolein-based model network displayed modulus, tensile strength, and elongation at break, characteristic of hard rubbers.

TL;DR: Yields were increased by increasing inter- and intramolecular attractive forces between the PSS chains in the capsules through electrostatic, hydrophobic, and a combination of these interactions, and the yields were practically unaffected by enhancing such effects between dendrimer molecules.

TL;DR: The influence of polymer concentration and temperature on the rheological behavior of chitosan solution was studied and the activation energy was determined as a function of the polymer concentration, and its evolution was compared with theoretical predictions.