This work aims at evaluating advancement in water shut-off performance using nanocomposite hydrogel (PVP-ZnO:RF) prepared from PolyVinylPyrrolidone (PVP); used as polymer, Resorcinol-Formaldehyde (RF); a crosslinker and nano Zinc Oxide (ZnO); strength modifier it was compared with conventional (PVP:RF) i.e. , without ZnO nanofiller. The ZnO, nanofiller this work, successfully bio-synthesized ( ...

The purposes of this study were evaluate by energy dispersed X-ray (EDS) and scanning electron microscopy (SEM) the inorganic particles of three nanofilled composite resins, comparing particles sizes, shape and composition, and the filler weight content by thermogravimetric analyzes (TGA). Three composite resins classified as nanofilled were selected to this study: Esthet-X; Grandio; Filtek Sup...

approved: La'rn J. Weber Acid-base balance in ammoniotelic fish can be accounted for by the concentrations and net flux rates of four generalized independent variables. The physicochemical principles of acid-base chemistry determine the quantitative interaction of acids and bases in an aqueous solution. In a given medium, acid-base balance is the instantaneous net result of input and output rat...

We report the linear increase in the glass transition temperature, Tg, with nanofiller weight content. ZnO quantum dots dispersed by melt-blending in a poly(methyl methacrylate) host were characterized by differential scanning calorimetry and dynamic mechanical analysis showing that the Tg of the system is described by a power law of the interparticle distance, hp, where the percolation exponen...

In the present study, carbon species including organic carbon (OC), elemental carbon (EC), and water-soluble organic carbon (WSOC) concentration in PM2.5 were assessed at an urban site of Tehran, Iran during March to June 2014. The PM2.5 samples were collected using an frmOMNITM Ambient Air Sampler. Thermal gravimetric analysis (TGA) was used to analyze OC and EC. The results showed that PM2.5 ...

The hydrogel is a preferred material for flexible wearable sensors. In practical application, it should have high-efficiency mechanical toughness and self-healing performance. Besides, requires good affinity adhesion because of its contact with the skin. this experiment, we made an ultra-tough excellent cell adhesion. We used sodium alginate (SA) polyacrylamide (PAm) mixture as base fluid. Poly...

In the present study, carbon species including organic carbon (OC), elemental carbon (EC), and water-soluble organic carbon (WSOC) concentration in PM2.5 were assessed at an urban site of Tehran, Iran during March to June 2014. The PM2.5 samples were collected using an frmOMNITM Ambient Air Sampler. Thermal gravimetric analysis (TGA) was used to analyze OC and EC. The results showed that PM2.5 ...

This research aims to increase the utility of globally and abundantly available waste natural fibres Gallus-Gallus coir from mattress car seat manufacturing factories. The composite samples were prepared with a rally round polyester resin grade GP500 bio-epoxy by synthesizing specially treated selectively used for reinforcement characterizing them through static dynamic mechanical analyses iden...