gelled propellants are improved propellants that can be considered as the final extension of liquid propellants. high specific impulse, good density and safety better than that of both solid and liquid propellants are advantages of the gel propellants. they are made by addition a suitable gellant to liquid propellants. in this research, nano al particles have been used in udmh gel fuel. the gel...

Abstract Alum sludge is a typical by-product of the water industry. The traditional management method, disposing in landfill sites, poses critical environmental and economic concern due to significant increase amount disposal cost. In this paper, feasibility reusing as cement replacement investigated, physical performance microstructure modification concrete products made with discussed. obtain...

The nanoparticles of Ti-Si mixed oxides (NTSO) with Rutile structure were prepared by sol-gel method in a mixture of alcohol and water as solvent. The solid product was characterized by XRD, FTIR, SEM, TEM, UV, TGA and laser Raman spectroscopy. The catalytic activity of NTSO (5-10 nm) was investigated in the epoxidation of cis stilbene, trans stilbene, and norbornene by using oxidants such as t...

The objective of this work was to develop bioadhesive topical gel of Aceclofenac with the help of response-surface approach. Experiments were performed according to a 3-level factorial design to evaluate the effects of two independent variables [amount of Poloxamer 407 (PL-407 = X1) and hydroxypropylmethyl cellulose K100 M (HPMC = X2)] on the bioadhesive character of gel, rheological property o...

The Alkali-Silica Reaction (ASR) in concrete is a chemical reaction, which produces an expansive product, generally called “ASR gel”, and causes cracking damage over time. Affecting numerous infrastructures all around the world, ASR has been topic of much research past decades. In spite that, many aspects this reaction are still unknown. numerical-investigation paper, three-dimensional meso-str...

This study developed an antibacterial oral gel to inhibit Streptococcus mutans, a bacterium that causes tooth decay. The was formulated using methanol extract of Piper betel leaves, hydroxypropyl methylcellulose and glycerin at different concentrations. evaluated for pH, viscosity activity against S. mutans standard methods. showed potent activity, supporting its use in the formulation. In sili...