INTRODUCTION Understanding ion diffusion phenomena in biological tissues is important for the study of signal transduction in tissue and cells. However, knowledge on ion diffusion in biological tissues is limited in literature [1-3]. In this paper, we report a new approach to investigating ion diffusion in non-charged porous materials using an electrical conductivity method. The objective of th...

BACKGROUND Following the production of Syrian gel, the scientists from Atomic Energy Commission of Syria, researchers in Yazd Atomic Energy Commission Radiation Processing Center in Iran, have manufactured a hydrogel wound dressing. This study was conducted to evaluate and compare the efficacy of these two hydrogels. METHODS In this study, 32 male Wistar rats underwent a full thickness circul...

We have investigated the thermodynamic and dynamic behavior of multistranded β-lactoglobulin protein fibrils in water, by combining static, dynamic, and depolarized dynamic light scattering (SLS, DLS, DDLS), small angle neutron scattering (SANS), rheology, and cryogenic transmission electron microscopy (cryo-TEM). We focus on the region of the phase diagram at which ionic strength and concentra...

An acid buffering bioadhesive vaginal (ABBV) gel was developed for the treatment of mixed vaginal infections. Different bioadhesive polymers were evaluated on the basis of their bioadhesive strength, stability and drug release properties. Bioadhesion and release studies showed that guar gum, xanthan gum and hydroxypropyl methylcelullose K4M formed a good combination of bioadhesive polymers to d...

In a nematic gel, the appearance of nematic order is accompanied by a spontaneous elongation of the gel parallel to the nematic director. If such a gel is made chiral, it has a tendency to form a cholesteric helical texture, in which local elongation of the gel parallel to the nematic director is suppressed due to the requirement of elastic compatibility. We show that a conical helix in which t...

The effect of high electric fields on the gel-electrophoretic mobility of open-circular DNA in agarose differs dramatically from that on linear molecules of the same molecular weight. At high fields, sufficiently large circular forms are prevented from migrating into the gel whereas linear molecules and smaller circular DNAs migrate normally. This effect is strongly field dependent, affecting c...

A general understanding of interactions between DNA and oppositely charged compounds forms the basis for developing novel DNA-based materials, including gel particles. The association strength, which is altered by varying the chemical structure of the cationic cosolute, determines the spatial homogeneity of the gelation process, creating DNA reservoir devices and DNA matrix devices that can be ...

Two forms of rabbit factor VIII procoagulant activity, distinguishable by size on gel filtration and ultracentrifugation, have been identified in normal rabbit plasma. These studies have been carried out with citrate-anticoagulated rabbit plasma obtained by cardiac puncture. Two peaks of factor VIII activity were obtained on agarose gel chromatography, using physiologic ionic strength buffers: ...

Adhesive strength is of critical importance for cryogenic laser-fusion targets when bonding the plasma-polymerized polystyrene copolymer plastic target shell to the support stalk (a narrow-diameter fiber of silicon carbide or Zylon PBO). Norland 68 and Dymax 921 gel, two rapid-curing, low-to-medium viscosity UV curable adhesives, are currently used for target fabrication depending on which fibe...

This study assessed the cross-sectional Knoop microhardness and flexural strength of root dentin exposed to different surface treatments with chemical agents after biomechanical preparation. Root canals from human canines were biomechanically treated and divided into eight groups (n=10) to receive one of the following dentin treatments: I. Deionized water (control); II. 5.25% Sodium hypochlorit...