Preparation and characterization of some cellulose derivatives nanocomposite films.

One of the most studied biocomponents is cellulose and its derivatives. Chemical structures of the nanocomposite films were investigated by Fourier Transform Infrared Spectroscopy (FT-IR) and X-Ray Diffraction (XRD) analyses. In the Scanning Electron Microscope (SEM) images taken at 5000 x magnification, the films with the best dispersion of nano-reinforcements; are amine modified nano SiO doped 2-hydroxyethyl cellulose (2-HEC) and hydroxypropyl cellulose (HPC) films.

Preparation and characterization of polyacrylic acid-hydroxyapatite nanocomposite by microwave-assisted synthesis method.

Polyacrylic acid, polyalkenoic acids in general, form the liquid ionomer phase of glass ionomer cements, which are frequently used in root restorations in dentistry. It is possible to obtain these ionomers with a fast, energy-efficient, high reaction efficiency and a clean method with microwave irradiation method. In this study, polyacrylic acid and its composite with nano HAp have been synthesized by microwave (MW) irradiation.

Preparation of electrospun polyurethane nanofiber mats for the release of doxorubicine.

Polyurethane (PU) and doxorubicine loaded-PU nanofiber mats were prepared by the electrospinning technique. The effect of some system and process parameters including flow rate, distance from collector, and concentration of solution on the size and morphology of nanofibers was investigated. The size, morphology and drug content of nanofiber mats were followed by scanning electron microscopy (SEM).

Ofloxacin Loaded Electrospun Fibers for Ocular Drug Delivery: Effect of Formulation Variables on Fiber Morphology and Drug Release.

Ofloxacin (OFL) loaded poly(ε-caprolactone) (PCL) and PCL: poly(butylene succinate) PBS fibers as a drug delivery system in the treatment of ocular infections were prepared by electrospinning. In particular, the effect of some formulation variables including polymer:drug ratio (9:1, 8:2 and 7:3 w/w), solvent systems like dichloromethane (DCM), N,N-dimethylformamide (DMF), N,Ndimethylacetamide (DMAc) and dimethylsulfoxide (DMSO), polymer blends of PCL:PBS at 80:20, 60:40 and 40:60 ratios on fiber morphology, fiber size were investigated. The morphology and diameter of the electrospun fibers were investigated by scanning electron microscopy (SEM) images also the thermal properties were evaluated by differential scanning calorimetry (DSC).

Evaluation of the effects of two novel irrigants on intraradicular dentine erosion, debris and smear layer removal.

Objectives: To evaluate the effects of copolymer of acrylic acid and maleic acid (Poly[AA-co-MA]) and calcium hypochlorite (Ca(OCl)2) on root canal dentin using scanning electron microscope (SEM).

Materials And Methods: Twenty-four single-rooted teeth were instrumented and the apical and coronal thirds of each root were removed, leaving the 5 mm middle thirds, which were then separated into two pieces longitudinally. The specimens were randomly divided into six groups and subjected to each irrigant for 5 min as follows: G1, Ca(OCl)2; G2, Poly(AA-co-MA); G3, Ca(OCl)2 + Poly(AA-co-MA); G4, sodium hypochlorite (NaOCl); G5, ethylenediaminetetraacetic acid (EDTA); G6, NaOCl+EDTA.

Activity of glucose oxidase immobilized onto Fe3+ attached hydroxypropyl methylcellulose films.

Hydroxypropyl methylcellulose (HMPC) insoluble films were prepared by (60)Co-γ irradiation of 10% (w/w) aqueous solutions of hydroxypropyl methylcellulose. The adsorption of Fe(3+) onto HPMC films was studied in the range of pH 3.0-7.

Synthesis, characterization and drug release behavior of poly(1-vinyl 1,2,4-triazole) hydrogels prepared by gamma irradiation.

Crosslinked poly(1-vinyl 1,2,4-triazole) (PVTAz) hydrogels in the form of rod and hollow cylinder (thin and thick wall) have been prepared by (60)Co γ-radiation initiated simultaneous polymerization and crosslinking of 1-vinyl 1,2,4-triazole in the presence of water. In binary aqueous systems, the degree of gelation decreased with the increasing water content. The swelling results obtained by using different form of hydrogels showed that the thin wall hollow cylinder hydrogels perform better than other hydrogels.