نتایج جستجو برای: retarding properties

تعداد نتایج: 870548  

A. Ehteram, M. Hamadanian, V. Jabbari

In the current study, pure TiO2 and Cr-doped TiO2 (Cr@TiO2) nanoparticles were synthesized via sol-gel method and the resulting materials were applied to prepare the porous TiO2 electrodes for dye-sensitized solar cells (DSSCs). It is hypothesized that the advantages of the doping of the metal ions into TiO2 lattice are the temporary rapping of the photogenerated electron-hole (charge carriers)...

Journal: :Journal of Energy Resources Technology-transactions of The Asme 2022

Abstract Geopolymer material has a potential to function alongside Portland Cement as an efficient cementitious for well cementing and plug abandonment applications. requires retarding agents be displaced into the while considering properties required maintain zonal isolation through superior mechanical properties. Chemical admixtures affect structure can, in some cases, jeopardize integrity if...

Journal: :Journal of pharmaceutical research international 2021

Aim: In present Pharmaceutical trend, natural excipients are gaining more importance because of their availability, safety, performance, and cost. The work aimed at extraction the mucilage from stem Musa paradisiaca (banana) evaluation extracted for its binding disintegrating properties with Paracetamol as a model drug.
 Methodology: was by aqueous method followed precipitation evaluated v...

Journal: :Physics of Plasmas 2021

Helicon plasma sources currently represent an active field of research in the domain low-temperature plasmas due to several interesting characteristics for in-space propulsion applications. This work reports direct comparison krypton and xenon properties through spatially resolved measurements performed near-field plume a sub-kilowatt-class 13.56 MHz helicon source. The set developed employed i...

Journal: :Psychonomic bulletin & review 2007
Harold Pashler Doug Rohrer Nicholas J Cepeda Shana K Carpenter

Our research on learning enhancement has been focusing on the consequences for learning and forgetting of some of the more obvious and concrete choices that arise in instruction, including questions such as these: How does spacing of practice affect retention of information over significant retention intervals (up to 1 year)? Do spacing effects generalize beyond recall of verbal materials? Is f...

2003
R. A. Pitts R. Chavan S. J. Davies S. K. Erents G. Kaveney G. F. Matthews G. Neill J. E. Vince

Retarding field analyzers ~RFAs! are essentially the only practical tool with which to measure the distribution of ion energies in the boundary plasma of magnetic fusion devices. The technique has long been attempted in such facilities with varying degrees of success, but, by virtue of the delicate nature of these material probes and the hostile environment in which they are inserted, its use h...

2010
Paul CS Lu Jackie CL Chen

PURPOSE To investigate whether seasonal modification in the concentration of atropine drops is effective in retarding the progression of myopia. METHODS Two hundred and forty eyes of 120 healthy preschool- and school-age children in Chiayi region, Taiwan were recruited. The treatment group consisted of 126 eyes of 63 children who received atropine eye drops daily for one year and the control ...

2009
M. Udayakumar

--Stringent emission norms and environment degradation due to pollutants from the automotive vehicles lead us to find the suitable alternative for the petro-diesel. Among the alternatives the non-edible vegetable oil seems to be most promising one. When the vegetable oil is used as fuel in diesel engine, it does not cause any major problem if used for a short period. However in the long run it ...

Journal: :Journal of prosthodontics : official journal of the American College of Prosthodontists 2009
Rosario Prisco Giancarlo Cozzolino Paolo Vigolo

PURPOSE Shrinkage of resinous die materials during setting reaction limits their acceptance, even though these materials show several advantages compared to stone die materials with respect to strength, abrasion resistance, and detail reproduction. The purpose of this study was to determine if retarding the setting reaction during polymerization and altering the base-to-catalyst ratio, as sugge...

Journal: :Land Degradation & Development 2022

Organic matter management can improve soil structural properties. This is crucial for agricultural soils in tropical regions threatened by high rainfall intensities. Compared to conventional farming, organic farming usually deemed increase carbon and properties such as stability permeability. However, how much, if any, buildup of possible or indeed occurring also depends on type environmental f...

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