摘要:

AbstractBy using Th‐234 as tracer, the synergistic effects in the extraction of thorium from aqueous solutions with mixtures of organic solvents were investigated for the system Th4+/β‐diketones/TBP/diluents. Four β‐diketones,i. e., acetylacetone, benzoylacetone, dibenzoylmethane and trifluoroacetone, were used. Synergistic enhancements on the distribution ratios were observed in all cases except when acetylacetone was used as the chelating agent at thepH range of 2–3. Based on the experimental observations, a plausible mechanism for the synergistic effect has been suggested. The effect of diluent is also

ISSN:0009-4536    

DOI:10.1002/jccs.196300001

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractEnrichment of chromium‐51by Szilard‐Chalmers process was studied, using potassium and ammonium chromate as target materials. Separation of enriched phase from the target was carried out by ion exchange method. Enrichment factor as high as 3,000 was attained for a potassium chromate target. When ammonium chromate was used as the target, the enrichment factor was much lower, amouting only to

ISSN:0009-4536    

DOI:10.1002/jccs.196300002

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractPyrogallolsulfonephthalein and its complexes with zirconium and hafnium were spectrophotometrically studied in HClO4and NaClO4solutions of variouspH's. An absorption maximum at 472 mμ has been found for pyrogallolsulfonephthalein atpH 1.0 and 1.5. It shifts to 518 and 520mμ in the presence of zirconium atpH 1.0 and hafnium atpH 1.5, respectively. The mole ratios of both metals to the dye have been found to be 1:1, and the apparent instability constants of the complexes are estimated as 1.34×10−5for the former and 7.06×10−6for the

ISSN:0009-4536    

DOI:10.1002/jccs.196300003

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractThe formation of complex between uranyl ion and glycine was investigated by the polarographic method. A reversible and diffusion controlled reduction waves were observed over thepH range 1.7 to 5.0 when the glycinate concentration was 0.049Mto 0.393M. The effect ofpH and the concentration of chelating agent on the half‐wave potential has been determined. The chelate species and the electrode reactions have been establishe

ISSN:0009-4536    

DOI:10.1002/jccs.196300004

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractInfrared absorption spectra of eleven 8‐halogenoflavonoids, flavanone, and2′‐hydroxychalcone in the region 3,500–3,650cm−1are observed with an Infracord Spectrophotometer in solid state. Absorption bands in the regions 3,500–1,400cm−1and 1,000–650cm

ISSN:0009-4536    

DOI:10.1002/jccs.196300005

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractInfrared absorption spectra of seventeen 7‐halogenoflavonoids in KBr disks are observed with an Infracord Spectrophotomter. Absorption bands in the regions 3,500–1,400cm−1and 1,000–650cm−1are

ISSN:0009-4536    

DOI:10.1002/jccs.196300006

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractThe structures of shonanic acid and isoshonanic acid were determined as 4, 4‐dimethylcyclohepta‐2, 5‐dienecarboxylic acid and 4, 4‐dimethylcyclohepta‐5, 7‐dienecarboxylic acid, respectively, by degradative studies and spectro

ISSN:0009-4536    

DOI:10.1002/jccs.196300007

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY

摘要:

AbstractFour new silyl derivatives of isomeric xylenols were prepared and their properties are reported.

ISSN:0009-4536    

DOI:10.1002/jccs.196300008

出版商:WILEY‐VCH Verlag    

年代:1963

数据来源: WILEY