摘要:

AbstractInter‐molecular association in the chloroform‐acetone and diethyl ether‐chloroform systems was studied in terms of polarization at optical frequency, of which the theory had been developed in the previous paper.In the chloroform‐acetone system, the association ratio of acetone to chloroform was found to be 1:1 and 1:2 corresponding to the formation of the intermolecular associaton complexes AB and AB2where A stands for acetone and B for chloroform.While in the case of the diethyl ether‐chloroform system, only complex of 1:1 association ratio was detected.The polarizability constants and collision radii of these association complexes were determined exper

ISSN:0009-4536    

DOI:10.1002/jccs.196400001

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractIron‐59 with high specific radioactivity was obtained by means of Szilard‐Chalmers process. Enrichment factor of as high as 750 was attained when potassium ferrocyanide was used as target material and was irradiated at a neutron flux of 1.8×1012n/sec‐cm2for 100 hours. However, a lower factor of 130 was obtained when potassium ferricyanide was used instead. Both precipitation and direct extraction with isopropyl ether in hydrochloric acid solution were employed as means of separation. The relation between irradiation time, enrichment factor and specific activity was also investigated. The radiative decomposition constants of potassium ferrocyanide and ferricyanide were est

ISSN:0009-4536    

DOI:10.1002/jccs.196400002

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractThe removal of Sr‐90 by various clay deposits atpH values ranging from 0 to 14 shows slightly less effective than radiocesium uptake. The radiostrontium uptake by Red and Yellow soil is greatly affected by the foreign cations (0.01N). Yellow soil is particularly suited for the removal of Sr

ISSN:0009-4536    

DOI:10.1002/jccs.196400003

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractThe removal of radiouropium (Eu‐152, 4) is practically complete at thepH values greater than 4 by the seven clay deposits studied. The chemical properties of the radioeuropium rather than the nature of the sorbing matrices are the determining factor in its decontamination. The effect of competition toward radioeuropium uptake from solutions by, and extraction of sorbed radioeuropium from, Yellow and Red soil by various cations (0.01N) have been studie

ISSN:0009-4536    

DOI:10.1002/jccs.196400004

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractProton magnetic resonance spectrum of thujic acid was studid at 60MC. Ethylenic proton spectra appeared in the range of 2.35T‐4.89TThese are of interest from the point of view of structure determination. The proton spin‐spin coupling constants were determined to be 10.0cpsfor double‐bonded vicinal protons, and 6.8cpsfor single‐bonded vicinal protons. Two barely resolved quartets suggest the spin‐spin coupling between H1and H0for which the value was found to

ISSN:0009-4536    

DOI:10.1002/jccs.196400005

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractTwo varieties of spearmint grasses were collected to determine the yields of the essntial oil as well as the chemical constituents of the oil.The annual production of the Japanese improved variety grass was about 10,000–18,000 kg/ha. and that of the essential oil was about 20 kg/ha. The oil is mainly composed of 53.4% (—)‐carvone and 27.5% (—)‐limonene.The annual production of the Ryan‐Fong variety grass was about 30,000 kg/ha. which in turn yielded about 80 kg/ha of the essential oil. The oil contains 5% (—)‐limonene, 60% pulegone, and 30% rotundifolone.The ultraviolet spectrum of rotundifolone semicarbazone in methanol showed maxima at 273–274m μ., which was slightly different from the value reported by Indian investigator. The reason f

ISSN:0009-4536    

DOI:10.1002/jccs.196400006

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractFour isomeric dimethyldixylenoxy silanes have been synethesized, some of their physical constants determined.

ISSN:0009-4536    

DOI:10.1002/jccs.196400007

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY

摘要:

AbstractDi‐, tri‐ and tetracholesteroxysilane have been Synthesized, and some of their properties repor

ISSN:0009-4536    

DOI:10.1002/jccs.196400008

出版商:WILEY‐VCH Verlag    

年代:1964

数据来源: WILEY