Previous reports (Drescher, D. G., and Lee, K. S. (1978) Anal. Biochem. 84, 559-569; Lee, K. S., and Drescher, D. G. (1978) Int. J. Biochem. 9,457-467) have shown that high performance liquid chromatographic analysis of amino acids with the o-phthaldialdehyde/2mercaptoethanol reagent (OPA/P-ME) is one of the most sensitive procedures currently available for micro amino acid analysis. In the pre...

This study was designed to probe the fabrication of unique silver and gold nano-structures engaging a self-designed chitosan-porous anodic alumina nano-composite as a template. Porous anodic alumina has been manufactured by di-step aluminum anodization in an oxalic acid electrolytic bath. The surface properties of porous anodic alumina were reinforced by chitosan neutralized in sodium hydro...

We have investigated the photoluminescence ~PL! from anodic alumina membranes with an ordered nanopore array formed on bulk Al foils. Most of the membranes fabricated by anodization in oxalic acid showed a strong PL peak in the blue. Due to an obvious asymmetry, the PL peak can be Gaussian divided into two bands around 405 and 455 nm, having a slight shift with the sample formed in different ac...

Two different ionic liquids have been tested in the electrochemical fabrication of anodic porous alumina in an aqueous solution of oxalic acid. It was found that during galvanostatic anodization of the aluminum at a current density of 200 mA/cm2, addition of 0.5% relative volume concentration of 1-butyl-3-methylimidazolium tetrafluoborate resulted in a three-fold increase of the growth rate, as...

A silica-monolayer loaded on alumina with weak Brønsted acid sites and large pore size can selectively dealkylate alkyl polycyclic aromatics to long-chain alkanes for production of chemicals fuel.

The role of thiourea as an organic additive in the nucleation and growth mechanism was studied for copper deposition its application decorative electroplating fashion accessory industries. bath designed to reduce environmental ecological impacts using methanesulfonic acid electrolyte alternative alkaline cyanide baths. We evaluated exploiting voltametric chronoamperometric measurements with a b...

Regioselective methanesulfonylation of simple aromatics using methanesulfonic anhydride can be achieved over zeolite catalysts. For example, methanesulfonylation of toluene over various cation-exchanged zeolite beta catalysts affords higher para-selectivity in the synthesis of methyl tolyl sulfone than standard Friedel-Crafts methanesulfonylation utilising aluminium chloride.

Catalysts based on zirconia- and alumina-supported tungsten oxides (15 wt % W) with a small loading of platinum (0.3 Pt) were selected to study the influence reduction temperature nature support hydroisomerization n-dodecane. The has major metal dispersion, which impacts catalytic activity. In addition, alumina zirconia supports show different properties (mainly acid site strength surface area)...