Silicon microneedle arrays (MNAs) have been widely studied due to their potential in various transdermal applications. However, discrete MNAs, as a preferred choice to fabricate flexible penetrating devices that could adapt curved and elastic tissue, are rarely reported. Furthermore, the reported discrete MNAs have disadvantages lying in uniformity and height-pitch ratio. Therefore, an improved...

This work evaluates the effect of sodium meta-silicate pentahydrate (SMS) and potassium hydroxide concentrations on properties Al2O3-TiO2 coatings produced through plasma electrolytic oxidation in a solution containing 3 g L?1 titanyl oxalate, (PTO), using unipolar waveform with constant current density. The surface cross-section characteristics PEO including morphology, elemental distribution,...

The catalytic conversion of lignin model compounds was performed using Ru/C catalysts and an autoclave reactor. were prepared by the impregnation method highly porous homemade activated carbon characterized XRD, SEM, specific surface area. reactions in a high pressure/temperature reactor at different temperatures with solvents. results showed that novel from supports KOH agent higher activity t...

The host-finding behavior of Strongyloides stercoralis infective larvae was examined by in vitro agarose assay method. As human body fluid contains 0.85% (ca 0.15 molar) NaCl, various concentrations of sodium chloride, from 0.5M to 0.01M (7 steps), were examined. Many larvae were attracted at concentrations between 0.5 and 0.05M of sodium chloride. The concentration of 0.05M attracted the most ...

A high pressure oxydesulphurisation technique was investigated to reduce sulphur content, especially at ambient temperature. Prince of Wales coal was chosen for this study. The focus of the study was on the reduction of both pyritic and organic sulphur. The effects of pressure, coal slurry concentration, pH and KOH concentration in a fixed time interval on sulphur removal were studied with a se...

In order to clarify the mechanism that zinc and phosphorus elements entering the micro-arc oxidation (MAO) coatings developed on Ti-6Al-4V alloys, anodic coatings containing different zinc and phosphorus were fabricated using an orthogonal experiment of four factors with three levels in an electrolyte containing EDTA-ZnNa₂, KOH, and phytic acid. Surface morphology, element composition, chemical...

Gaseous potassium (K) species released from biomass during thermochemical conversion pose challenges to reactors and human health. Photofragmentation tunable diode laser absorption spectroscopy (PF-TDLAS) was used for simultaneous, high-dynamic range measurements of atomic K, hydroxide (KOH) chloride (KCl) in flat flames seeded with KCl salt. An expression the PF-TDLAS signal is presented exper...

In this study, corn cob was used as raw material and modified methods employing KOH KMnO4 were to prepare activated carbon with high adsorption capacity for mercury ions. Experiments on the effects of different influencing factors ions undertaken. The results showed that when KOH, optimal time 120 min, optimum pH 4; KMnO4, 60 3, amount adsorbent initial concentration both 0.40 g/L 100 mg/L unde...

Abstract This study investigated the efficiency of CO 2 curing in blast-furnace slag pastes activated with three concentrations KOH solution (3, 4, and 5 M). The was applied into alkali-activated paste for 3 days. -cured were subjected to subsequent a water bath or exposed seawater. mechanical properties characteristics reaction products compared. Full strength can be obtained within days early...

background: one of the key techniques for the preparation of 125i seeds is adsorption of 125i onto silver bits coated by palladium (pd). carriers played an important role in the adsorption of 125i on palladium. ki is used as a carrier for fixing of 125i onto silver wire bits coated with palladium. materials and methods: three procedures ki, koh, nh4oh were investigated for adsorption of 125i ac...