Th e acid liber ated th e wh ole of th e tungstic
acid from an equal volume of the tungstate, and practically all that was taken down by the pr otein precipitate leaving sufficient excess acid to give a filtrate with a pH between about 3.5 and 4.9 .
Zhang, "Catalytic conversion of cellulose to ethylene glycol over a low-cost binary catalyst of Raney Ni and tungstic
acid," ChemSusChem, vol.
De Jesus, "Synthesis and characterization of tungsten trioxide powders prepared from tungstic
acids," Materials Research Bulletin, vol.
Proteins in the blood were precipitated with tungstic
The standard protocols were followed for estimation of biochemical parameters viz., fasting blood sugar by GOD-POD method, total cholesterol by CHOD-PAP method, triglycerides by GPO-PAP method, HDL cholesterol by Phospho tungstic
acid method, LDL cholesterol, VLDL cholesterol were calculated by Fried-wield's formula and MDA by Thiobarbituric Acid (TBA) Reaction method and these parameters were determined by using spectrophotometer.
Sulfite reductase (SiR) activity was estimated by the coupled SiR/OASTL assay [24, 25] with the addition of NADPH and tungstic
By increasing the pH of the generator eluent, salts of tungstic
acid can be readily removed .
This clearly indicates that mesoporous silica with tungstic
acid Keggin network structure improves the conductivity behavior of the membranes due to high absorption level of phosphoric acid, thus creating a pathway for proton transfer.
The stock solution above (2mL) was placed into a volumetric flask (25 mL capacity) with 10 mL distilled water and 2 mL phosphomolybdic tungstic
The residue (silica and tungstic
acid) was washed with a small volume of hot (1+99) H2SO4, followed by water; the volume was made up to the mark with deionized water.
The patentee produced the purified tungsten by placing tungstic
oxide in a gas furnace, allowing oxygen, carbon, and impurities to escape.