Uranyl nitrate effects

Uranyl nitrate, effect on hydrogen peroxide analysis, 635... 

There have been many instances of examination of the effect of additive product on the initiation of nucleation and growth processes. In early work on the dehydration of crystalline hydrates, reaction was initiated on all surfaces by rubbing with the anhydrous material [400]. An interesting application of the opposite effect was used by Franklin and Flanagan [62] to inhibit reaction at selected crystal faces of uranyl nitrate hexa-hydrate by coating with an impermeable material. In other reactions, the product does not so readily interact with reactant surfaces, e.g. nickel metal (having oxidized boundaries) does not detectably catalyze the decomposition of nickel formate [222],... 

Uranyl Nitrate Influence on Polymer Growth. The effect of a solute such as uranyl nitrate on this polymer formation is so complex that the net effect on the polymer growth rate cannot be predicted. Experimentally, it is observed that the rates of growth at given initial HNO3 concentration are always slower in the presence of as indicated by the solid curve in... 

Gartland KP, Sweatman BC, Beddell CR, et al. 1991. Proton nuclear magnetic resonance urinalysis studies on the biochemical effects of a nephrotoxic dose of uranyl nitrate in the Fischer 344 rat. Proceedings, Fourth International Symposium on Nephrotoxicity, Guilford, England, UK 1989. Marcel Dekker, Inc., New York, NY 525-530. 

Jadon A, Mathur R. 1983. Gametogenic count and histo pathological effect of thorium nitrate and uranyl nitrate on mice testes. Andrologia 15 40-43. 

Detailed data on reaction (3) are not available and would be difficult to obtain. Certain qualitative relations can be seen, however. The effective retention of the full complement of water molecules by uranyl nitrate in extraction has been noted (4), indicating that, in systems in which the activity of water is reasonably high, ordinary oxygenated organic bases do not compete efficiently. In cobaltous nitrate solutions of low water content, addition of small amounts of water produces very marked effects, detectable spectrophotometrically (7). Similarly, for solutions of tctCoCl2 in acetone,... 

The recovery of uranium from the leach liquor is effected either by acidification to about pH 6 to liberate C02 or, more usually, by addition of hydroxide to precipitate diuranate, as shown in equation (27). In this latter case the pH is maintained at about 11. The species present in 0.055 M UVI solutions, acidified to pH 4.56 under 1 bar C02 pressure, have been summarized73 in a study of the reactive ion exchange adsorption of uranyl nitrate on to a bicarbonate loaded anion... 

Figure 2. Effect of uranyl nitrate (1% w/v) as sensitizer on UV grafting of styrene to cellulose in neutral and acid media. Time 24 h at 24 cm from 90 W high pressure UV lamp. Key O, graft in methanol + sensitizer + HsPOk (1% w/v) graft in methanol + sensitizer + H2SOk (1% w/v) , graft in methanol + sensitizer A, homopolymer in methanol + sensitizer , homopolymer in methanol + sensitizer + HsPOi (1% w/v) A, graft in dioxane, no sensitizer O, graft in dioxane + sensitizer.

Table 2. Electronic origins (all in cm-1) at very low temperatures in crystalline caesium and rubidium uranyl chloride, caesium uranyl nitrate and sodium uranyl acetate. The quantum number Q characterizing many-electron states in linear chromophores (subject to perceptible relativistic effects) may correspond to two energy levels because of the 4 or 6 ligating atoms in the equatorial plane...

Table II. Effect of Uranyl Nitrate Concentration in UV Grafting of Methyl Methacrylate (30% v/v) in Methanol to Cellulose0...

Brady, H.R., Kone, B.C., Brenner, R.M., Gullans, S.R. (1989). Early effects of uranyl nitrate on respiration and transport in rabbit proximal tubule. Kidney Int. 36 27-34. 

Lopez, R., Diaz Sylvester, P.L., Ubios, A.M., Cabrini, R.L. (2000). Percutaneous toxicity of uranyl nitrate its effect in terms of exposure area and time. Health Phys. 78 434-7. 

No treatment-related renal effects were seen in other studies when animals were exposed to uranium compounds by inhalation at concentrations as high as 10 mg U/m (as uranium dioxide) in guinea pigs for 28 weeks, 2 mg U/m (as uranyl nitrate hexahydrate) in guinea pigs for 26 weeks, and 16 mg U/m (as uranyl nitrate hexahydrate) in rats for 4 weeks (Rothstein 1949c Stokinger et al. 1953). 

In chronic-duration feeding studies, no adverse effects on the respiratory system were reported in 1-year studies of dogs given oral doses of 31 mg U/kg/day as uranium tetrachloride, 3,790 mg U/kg/day as uranium hexachloride, 8 mg U/kg/day as uranyl fluoride, or 4,407 mg U/kg/day as uranium dioxide (Maynard and Hodge 1949 Maynard et al. 1953). In 2-year studies, the respiratory system was unaffected in dogs and rats given 2 mg U/kg/day as uranyl nitrate hexahydrate and in rats given 12,141 mg U/kg/day as uranium dioxide, 664 mg U/kg/day as uranyl nitrate hexahydrate,... 

In other intermediate-duration studies, no effects were seen on the Uver of dogs given oral doses of 9,393 mg U/kg/day as uranyl nitrate hexahydrate or 191 mg U/kg/day as ammonium diuranate for 30 days (Maynard and Hodge 1949). Similarly, no effects were seen on the liver of rats given oral doses of 8,769 mg U/kg/day as uranium tetrachloride, 11,033 mg U/kg/day as triuranium peroxide,... 

---