We report on a very significant enhancement of the thermal, chemical, and mechanical stability of self-organized TiO2 nanotubes layers, provided by thin Al2O3 coatings of different thicknesses prepared by atomic layer deposition (ALD). TiO2 nanotube layers coated with Al2O3 coatings exhibit significantly improved thermal stability as illustrated by the preservation of the nanotubular structure ...

Reagents. β-D-(+)-glucose, ascorbic acid (AA), uric acid (UA) and p-acetamidophenol (AP) were purchased from Sigma and used as received. Porous anodic alumina (PAA) membranes with the pore sizes of 20 and 100 nm were from Whatman Corporation. The quoted pore diameters of the PAA membranes were 20 and 100 nm, but actually, according to the SEM image of the PAA membrane, there was a pore diameter...

The chromatographic behaviour of 27 different plasma proteins on fractionation of human plasma on immobilized Cibacron Blue F3-GA was studied. The column was eluted by using a three-step procedure. First, a low-molarity buffer (30 mM-H3PO4/Na3PO4, pH 7.0, I0.053) was used, then a linear salt gradient (0-1 M-NaCl in the buffer above) was applied, followed by a wash with two bed volumes of 1.0 M-...

Microwave assisted activated carbon from rubber seed pericarp (RSP) was successfully produced by using three different chemical activating agents of ZnCl2, KOH, and H3PO4. The process was carried out at 600W of irradiation power for 20 min. The absorption study was applied for these modified activated carbon samples under cationic methylene blue (MB) dye. The Carbonisation of RSP using ZnCl2 (R...

DP-bioglass paste has been demonstrated to produce 60 microm of sealing depth on exposed dentinal tubules. However, the occlusive effect depended on a continuous placement of DP-bioglass paste on dentinal surface for three days. In a bid to fabricate highly reactive DP-bioglass particles, a sol-gel method was used together with HNO3, NaOH, and H3PO4 as catalysts. As a result, the application ti...

Commercially pure titanium (cpTi) was etched using three concentrated acids: 18% HCl, 43% H3PO4, and 48% H2SO4. The bond strengths between five types of veneering composite resin and eight cpTi treatments (involving combinations of sandblasting, acid etching in 48% H2SO4, and vacuum firing) were determined before and after 10,000 and 20,000 thermal cycles. There were no significant differences ...

Indonesia as an agricultural country, produces products and their waste. To increase the utilization of waste, hence Palm Oil Mill Boiler Ash processed into adsorbent. This research aimed to determine effect contact time on quality adsorption process crude palm oil using adsorbent from Ash. The results showed that optimum at 60 minutes resulted in largest reduction free fatty acids by 2.99% wit...