Search results for "Gels"

HYDROGELS OF HYALURONIC ACID AND alpha, beta-POLYASPARTYLHYDRAZIDE AND THEIR BIOMEDICAL AND PHARMACEUTICAL USES

2005

Compositions and products based on the chemical crosslinking of hyaluronic acid with a polyfunctional polymer having a protein-like structure, bearing hydrazido pendent groups along the polymeric chain. The polymer is preferably, alpha-beta-polyaspartylhydrazide, a biocompatible macromolecule. The materials obtained after crosslinking, specifically hydrogels, undergo a reduced chemical and enzymatic degradation, unlike the starting hyaluronic acid, and they can be used to prepare systems for applications in the biomedical and pharmaceutical field.

Spectroscopic and microscopic characterization of BSA hydrogels: towards new biomaterials

2014

Development and characterization of xyloglucan-poly(vinyl alcohol) hydrogel membrane for wireless smart wound dressings

2018

Research which addresses advanced wound management can contribute to the needs of modern healthcare, especially in situations that require continuous monitoring, analysis, responsive therapeutic treatments and data recording. The development of “smart” bandages and dressings that can remotely monitor relevant parameters for the wound healing process without a hospital intervention can be very useful tools for patients and physicians and for advancing the understanding of the healing process. In the present work, biocompatible xyloglucan/poly(vinyl alcohol) hydrogels are being developed as smart wound dressings that, in addition to the traditional favorable properties of hydrogels as skin ca…

Hydrogel scaffolds based on k-Carrageenan/xyloglucan blends to host spheroids from human adipose stem cells

2019

Hydrogels are water-swollen networks of hydrophilic polymer. They can be fabricated in various shapes and swell in water or aqueous solutions maintaining their original shape or undergo progressive erosion; can exibit large volume phase transitions with the change of one environmental parameter (stimuli-responsivness), shock absorption and low sliding friction properties (1). The morphology and mechanical properties of hydrogels are strongly affected by the network composition, the nature and degree of crosslinking and the degree of swelling. Indeed, when hydrogels are designed as scaffolds for human tissues remodeling, they must have sufficient mechanical integrity to provide support to th…

POLYSACCHARIDE-BASED HYDROGELS FOR MYOCARDIUM REMODELING

2014

Hydration dependent dynamics in sol-gel encapsulated myoglobin.

2008

In this work we study the effect of hydration on the dynamics of a protein in confined geometry, i.e. encapsulated in a porous silica matrix. Using elastic neutron scattering we investigate the temperature dependence of the mean square displacements of non-exchangeable hydrogen atoms of sol-gel encapsulated met-myoglobin. The study is extended to samples at 0.2, 0.3 and 0.5 g water/g protein fractions and comparison is made with met-myoglobin powders at the same average hydration and with a dry powder sample. Elastic data are analysed using a model of dynamical heterogeneity to take into account deviations of elastic intensity from gaussian behaviour in a large momentum transfer range and r…

Funksjonell leddstabilitet i skulder: EMG-aktivering under stabile og ustabile forhold

2007

Masteroppgave i idrettsvitenskap, Høgskolen i Agder, Kristiansand Mål: Sammenlikning av EMG-aktivering i kraftutviklende og stabiliserende muskulatur i skulderleddet under stabile og ustabile forhold hos trente og utrente i en lukket kjede push-up. Metode: 12 godt trente menn (T), 22+/-5 år, med erfaring fra idretter som kampsport, turn, stuping, håndball, styrkeløft og andre idretter som stiller store krav til funksjonell styrke i skulderleddet, ble sammenliknet med 8 utrente menn(UT)23±5 år. Forsøkspersonene utførte fire tester i push-upstilling under både stabile forhold (S,på push-upsbøyler) og ustabile forhold(US,i to 2,5 m lange slynger hengende fra taket). Følgende tester ble gjennom…

PREPARATION AND IN VITRO CHARACTERIZATION OF NEW HYDROGELS BASED ON INULIN AND ALPHA,BETA-POLYASPARTYLHYDRAZIDE FOR COLONIC DRUG DELIVERY

2008

Exemples de QSAR sur des coefficients de partage

2005

National audience

Designed biodegradable hydrogel structures prepared by stereolithography using poly(ethylene glycol)/poly(D,L-lactide)-based resins

2010

Designed three-dimensional biodegradable poly(ethylene glycol)/poly(D,L-lactide) hydrogel structures were prepared for the first time by stereolithography at high resolutions. A photo-polymerisable aqueous resin comprising PDLLA-PEG-PDLLA-based macromer, visible light photo-initiator, dye and inhibitor in DMSO/water was used to build the structures. Porous and non-porous hydrogels with well-defined architectures and good mechanical properties were prepared. Porous hydrogel structures with a gyroid pore network architecture showed narrow pore size distributions, excellent pore interconnectivity and good mechanical properties. The structures showed good cell seeding characteristics, and human…