This paper undertakes a parallel analysis of the gelation mechanisms, structure and rheological properties of gelatin and collagen gels. Although the molecular compositions of collagen and gelatin are almost identical, gelation proceeds from distinct mechanisms and leads to different types of molecular assemblies. First are presented the properties of the solutions, based on their structural an...

Introduction Gels are particularly suitable to study ion-polymer interactions. Monovalent-divalent cation-exchange plays central role in various physiological processes such as nerve excitation and muscle contraction It is natural to use synthetic polyelectrolyte gels as model systems to demonstrate principles, develop and verify new experimental approaches. They are relatively easy to make, th...

Introduction Stimuli-responsive gels that exhibit swelling/shrinking changes in response to environmental changes such as pH and temperature have many future opportunities as suitable materials for mimicking biomolecules and designing smart systems in the biochemical and biomedical fields [1]. For example, self-regulated drug delivery can be achieved by loading a drug within pHand temperature-r...

We investigate the linear and nonlinear viscoelastic properties as well as the reversibility of strain-stiffening behavior of silk fibroin gels. The gels are prepared from 4.2w/v% fibroin solution in the presence of butanediol diglycidyl ether and N,N,N',N'-tetramethylethylenediamine (TEMED) as a cross-linker and catalyst, respectively. By changing the concentration of TEMED in the gelation sys...

This study involves the preparation, microstructural, physical, mechanical and biological characterization of novel gelatine and gelatine/elastin gels for their use in the tissue engineering of vascular grafts. Gelatine and gelatin/elastin nanocomposite gels were prepared via a sol-gel process, using soluble gelatine. Gelatine was subsequently crosslinked by leaving the gels in 1% glutaraldehyd...

This article gives an overview of uncommon replaceable matrices (gels) for capillary gel electrophoresis. This electrophoretic technique is useful mainly for the separation and analysis of biopolymers-nucleic acids and their fragments, and proteins/peptides. Commonly used gels are not reviewed. Those mentioned and discussed here are gels containing saccharides, newly developed acrylamide-based ...

This paper describes convenient preparations of heterogeneous multisectional polyacrylamide slab gels and the protocols that use these gels to measure protein-ligand binding constants [using bovine carbonic anhydrase B (CAB) as a model system]. Unlike procedures for affinity electrophoresis using tube gels, all binding information concerning protein-ligand interactions was encoded in a single m...

Calcium-enhanced protein recovered from black bullhead catfish was used to develop gels containing increasing amounts of potato starch (0-20 g/kg protein paste) and the effects of starch on functional, textural, and color properties were tested. Energy required to unfold protein groups was greater with the addition of 5 g starch/kg protein paste. Gels containing starch were harder, chewier, and...

The aim of our study was to identify factors affecting the in vitro release diclofenac sodium (DS) from hypromellose-based gels (HPMC).
 Materials and methods. Gels with HPMC liquids without were studied by viscosity-rotating viscometer method spin probe electron paramagnetic resonance spectroscopy. Rheograms used determine flow behavior apparent viscosity, EPR spectra rotational correlati...