GTP cyclohydrolase, purified from extracts of Comamonas sp., was shown to convert GTP to formic acid and a single fluorescent compound. The fluorescent product was identified as a dihydroneopterin triphosphate by its absorption spectra and phosphate analysis. After oxidation and dephosphorylation, the D-eryihro configuration of the side chain of this dihydroneopterin triphosphate was establishe...

Spectral sensitization of a mesoporous graphite carbon nitride (mpg-C(3)N(4)) photocatalyst was investigated by depositing magnesium phthalocyanine (MgPc) to expand the absorption to wavelengths longer than those of the principal mpg-C(3)N(4). The obtained sample, MgPc/Pt/mpg-C(3)N(4) (Pt as a cocatalyst) showed stable photocatalytic evolution of hydrogen from aqueous solution in the presence o...

In nuclear power plants, the main corrosion product that is deposited on the outside of steam generator tubes is porous magnetite. The objective of this study was to simulate porous magnetite that is deposited on thermally treated (TT) Alloy 690 steam generator tubes. A magnetite layer was electrodeposited on an Alloy 690TT substrate in an Fe(III)-triethanolamine solution. After electrodepositi...

Servicio de Dermatología, Hospital General Universitario de Valencia, Spain in 2004 and 2005.6 The highest number of positive reactions was seen with ketoprofen (45 cases). Promethazine occupied sixth place with 7 cases, although in none of them were the reactions considered relevant. In our experience, of the 48 photopatch tests done in the Dermatology Department of Hospital 12 de Octubre in M...

Acid Orange 7 (AO7) is one of the most common azo dyes; however, its strong bond makes them difficult to biologically degrade. We sought degrade AO7 dye using CeO2 as a promising alternative photocatalyst. powders were synthesized with monoethanolamine (MEA), diethanolamine (DEA), and triethanolamine (TEA) precipitant by solvothermal process combined calcination in air. Compared oxygen storage ...

Magnetohydrodynamic mixing was evaluated as an alternative to conventional high shear (HSM) in the preparation of carbomer hydrogels containing 1.22 wt% Carbopol® 980 NF. Neutralization dispersion (pH = 2.74) with triethanolamine (TEA) enabled adjust pH mixture and tune viscosity hydrogel. Using HSM, this approach limited 0.2 TEA 3.83) gel became too viscous recirculation flow dropped from 12 0...

Abstract The hazard-free treatment of Cr( vi ) ions is critical in modern industry. Photocatalytic reduction and detoxification are high-potential strategies. Photocatalysts with high efficiency, low cost, environmental friendliness, easy mass products required. In this study, we report a facile strategy using triethanolamine (TEOA) as capping ligand to modify the surface ZnO nanospheres. exper...

The effect of triethanolamine (TEA) at various dosages on the early performance cement paste was systematically evaluated through techniques rheological measurements, penetration tests, and ultrasonic pulse velocity. correlation to chemical hydration process analyzed by calorimetry, zeta potential, in situ XRD, pore solution analysis. It is found that TEA strongly dependent its dosage. With dos...