In this work, we report for the first time, tungstic acid-catalyzed oxidation of terpene alcohols with hydrogen peroxide. This simple, solid, and commercially available catalyst efficiently promoted conversion borneol, geraniol nerol to camphor epoxide products, respectively. Effects main reaction parameters, such as load, molar ratio oxidant substrate, temperature were investigated. Conversion...

The dielectric/metal/dielectric multilayer is suitable for a transparent electrode because of its high-optical and high-electrical properties; however, it is fabricated by an expensive and inefficient multistep vacuum process. We present a WO3/Ag/WO3 (WAW) multilayer transparent anode with solution-processed WO3 for polymer light-emitting diodes (PLEDs). This WAW multilayer not only has high tr...

In the present study, we fabricated tungsten trioxide nanoparticles (WO3 NPs) from a complex [W(C13H10NO)3] of ligand N-salicylideneaniline with tungstic acid as precursor. Nanoparticles were synthesized using direct thermal decomposition method. These evaluated for cytotoxicity influence on human breast cancer MCF7 cell line (adenocarcinoma). The observed results suggested that WO3 can destroy...

Mesoporous tungstic acid functionalized KIT-6 has been synthesized through a condensation of (3-chloropropyl) triethoxysilane and Si-KIT-6 followed by substitution of chloromethylation functionalized KIT-6 by sodium tungstate dihydrate. The synthesized tungstic acid functionalized KIT-6 (W-KIT-6) was characterized by low and wide angle X-ray diffraction analysis (XRD), N2 adsorption-desorption ...

Serum levels of total glycerides and free glycerol are important indices of lipid metabolism and cardiovascular disease risk. Convenient enzymatic methods of measurement have been available, but they are susceptible to interference. Situations exist in both research and clinical laboratories in which more specific and precise methods are needed. We developed HPLC methods for the measurement of ...

The microbiological assay procedure for the determination of amino acids is particularly well suited for routine analyses of low potency materials. Its application to metabolic studies includes the measurement of “apparent free” amino acids in plasma of a number of species (l-4), “free” (5-10) and total (6-10) amino acids in urine, and free amino acids in sweat (11) and cerebrospinal fluid (12)...

Attempt was made to study the factors that affect maximum yield of nonprotein nitrogen from various skeletal muscles. The results showed that sonification was the most, effective method out of the various extraction procedures used for the extraction of NPN, while the use of tungstic acid as protein precipitant was most suitable. The pH studies showed that pH 2 gave the optimal yield of NPN. Re...

While salicylates are among the most frequently prescribed drugs, methods for their determination in blood have been neither sufficiently sensitive nor precise. Brodie, Udenfriend, and Coburn (1) have devised a procedure suitable for the clinical measurement of blood salicylate levels if large doses are given. In their method the salicylate is extracted from acidified plasma with ethylene dichl...