Nobuyoshi Shinohara

Hot atom chemistry of tripolyphosphate—II: Reactions of 32P resulting from neutron activation

Abstract Sodium tripolyphosphate hexahydrate (Na 5 P 3 O 10 ·6H 2 O) and anhydrous salt (Na 5 P 3 O 10 ) were irradiated at reactor temperature of about 60°C, dry-ice temperature of about −76°C, in liquid state (aqueous solution) and in frozen state. The retention increased with increases of irradiation time at reactor temperature from a value of 30–50 per cent, yet at dry-ice temperature a constant but lower retention value of about 28 per cent was obtained. Water molecules, either as waters of hydration or solvent, play a very important role in the chemistry of the recoil species. The retention value was largely reduced by the presence of water molecules. Under the same experimental condition the retention value of anhydrous salt attained 48 per cent, while hexahydrate salt 38 per cent, frozen state (0·1 M aqueous solution) 8·5 per cent and liquid state (0·1 M aqueous solution) 1·0 per cent. The labeling position of 32 P in tripolyphosphate was determined by the limiting alkaline hydrolysis method and the radioactivity was found uniformly distributed among the three phosphorus atoms. Sodium pyrophosphates (Na 4 P 2 O 7 ·10H 2 O and Na 4 P 2 O 7 ) and sodium polymetaphosphate (NaP O 3 ) were irradiated in the same way as in tripolyphosphate and a similar trend of results was obtained.

Gas-Phase Radiolysis of Ammonia: Effect of Density and Additives

The effects of additives and density on the radiolysis of ammonia at room temperature were studied. Additives such as ethylene, nitrous oxide, and carbon tetrachloride affected

Radiolysis of CoIII-EDTA in Aqueous Solution; the Yields of Hydrogen and Hydrogen Peroxide in 0.8 N Sulfuric Acid

G({\rm H}_{2})

Photochemical Generation of Sn(III) in Hydrochloric Acid Solutions

from ammonia at ∼50 cm Hg to varying degrees. Comparison of values of

Radiolysis of CoIII-EDTA in Aqueous Solution; The Effect of pH

\Delta G({\rm H}_{2})

Photochemical Reactions of the Oxoperoxovanadium(V) Complex in an Acidic Aqueous Solution

of different additives led to the following conclusions: The contribution from ionic processes to the total

Chain decomposition of bis(oxalato)peroxotitanate(IV) complex initiated by Ti(III), Cr(II), and V(II)

G({\rm H}_{2})

Photochemical Generation of μ-Amido-μ-peroxo-bis[bis(ethylenediamine)cobalt(III)] Complex from the Corresponding μ-Hyperoxo Complex in Neutral Aqueous Solution

is ∼42%; ∼95% of the neutralization produces H atoms rather than H2. Over the density range 0.0005 to 0.0067 gm/cc,

The Hydrogen Yields in the Radiolysis of Cysteine and Biscysteinatocobaltate(III) in 0.8 N Sulfuric Acid

G({\rm H}_{2})=4.3

Enrichment of Phosphorus-32 by Activation of Tripolyphosphate

to 4.6 and