objective: silicon is an effective element in bone biomineralization; hence si-substituted hydroxyapatite can be a relevant bioceramic as bone materials substitution. materials and methods: stoichiometric hydroxyapatite (ha) and si-substituted hydroxyapatite (si-ha) with different contents of si substitution were synthesized successfully by a hydrothermal method using ca(no3)2, (nh4)3po4 or (n...

In this work, a novel Silicon on Insulator (SOI) MOSFET is proposed and investigated. The drain and source electrode structures are optimized to enhance ON-current while global device temperature and hot carrier injection are decreased. In addition, to create an effective heat passage from channel to outside of the device, a silicon region has embedded in the buried oxide. In order to reduce th...

Strain gauge type pressure sensors are widely used in different branches of industry to measure from very low high (1400 Mpa) values. This article investigates a strain sensor that uses silicon oil within its housing transmit working the external environment sensing plate. An important failure mode arises loss/leakage oil, whereby portion internal volume is replaced by gas, usually air. Coupled...

Abstract Recently, nanoparticle additives have been used to improve stability and hence efficiency of chemicals during enhanced oil recovery. Herein, a comparative analysis the application nanoparticle-stabilized xanthan gum for recovery applications was investigated. The nanoparticles as are silicon oxide (SiO 2 ), metallic aluminium (Al O 3 titanium (TiO ). Rheological measurements were carri...

This paper proposes a preliminary design tool for active power filters’ (APFs) solutions to be applied in offshore oil and gas platforms, where quality indices are typically low, reactive compensation current harmonic mitigation often desired. The proposed approach considers that APF selection rating is trade-off between performance size, both component system aspects need optimized achieve wel...

Antibiotics are not chemically stable in water based oral pharmaceutical suspensions. Anhydrous liquid antibiotic suspension for oral administration provides a product having good shelf life and taste characteristics relative to conventional liquid formulations. A ready to use oil based cefpodoxime proxetil preparation which can be stored at room temperature was prepared and evaluated for its o...

porous silicon layers have been prepared from n-type silicon wafers of (100) orientation. sem, ftir and pl have been used to characterize the morphological and optical properties of porous silicon. the influence of varying etching time in the anodizing solution, on structural and optical properties of porous silicon has been investigated. it is observed that pore size increases with etching tim...