A small-scale laboratory apparatus was built to study liquid friction modifier (LFM) behavior in a top-of-rail application. field experiment also carried out complement the findings. KELTRACK® (a water-based LFM) used as test fluid. Laser-induced fluorescence served measure LFM thickness left on track after passage of wheel. The lab experiments show that cannot withstand high wheel-rail contact...

in this research, polyvinylchloride based composite heterogeneous cation exchange membranes were prepared by the solution casting technique. chitosan-co-iron nickel oxide nanoparticles were utilized as membrane surface modifier to improve the membranes electrochemical properties. the effect of additive nanoparticle concentration in the modifier solution on the properties of composite membranes ...

In this study, halloysite and sepiolite nanoclays were used to reinforce SBS modified bitumens. The are different from the materials in literature have properties such as easy find, economical available local sources. mixing parameters determined before production process. polymer additive was added into base bitumen at 3% 5%, nanoclay additives 2% 4% ratios. morphological structures investigat...

In this work, we report, optical properties of Cd1-xSnxTe quantum dots (x= 0.05, 0.10 and 0.15) synthesized in water using thioglycolic acid (TGA) as a modifier agent. The optical characterization of the samples was performed through absorption (UV) and photoluminescence spectra (PL). A red shift absorption and fluorescent emission peaks was observed which can be related t...

This study examined the acquisition of prenominal and postnominal genitives by Iranian EFL learners. Two variables were considered: possessive categories and language proficiency. We considered the influence of possessive categories such as lexical modifier, semantic relationship, and weight and syntactic complexity on genitive alternations by Iranian EFL learners. Also, we examined whether the...