English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Tools annual

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

The hydrolysis constants of tetravalent neptunium (Np(IV)) were determined by solvent extraction method using thenoyltrifluoroacetone(TTA). In order to avoid colloid formation, a stock solution of carrier-free   239 Np(V) was from   243 Am milked. The valence of Np in the solution was then reduced to Np(IV) by using zinc amalgam. The hydrolysis constants ( β   m  ) of the reactions, Np 4+ + m OH − =Np(OH)  m   (4− m )+  was evaluated by using distribution ratios at ionic strengths ( I )=0.1, 0.5 and 1.0. All experiments were performed in oxygen- free 0.5% H 2 −N 2  atmosphere (below 1.0 ppm of O 2 ) in a glovebox at room temperature (23±2 °C) to avoid oxidation of Np(IV). The  β   m   values were extrapolated to the standard state ( I =0) by using the specific ion interaction theory (SIT), and the formation constants at  I =0 were determined to be log β  1 °=13.91±0.23, log β  2 °=27.13±0.15, log β  3 °=37.70±0.30 and log β  4 °=46.16±0.30. The ion interaction coefficients were also evaluated to be  ε (NpOH 3+ , ClO 4  − )=0.49±0.15,  ε (Np(OH) 2  2+ , ClO 4  − )=0.35±0.11, and  ε (Np(OH) 3  + , ClO 4  − )=0.29±0.15.

Hydrolysis constants of tetravalent neptunium by using solvent extraction method