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'Isotope Separation' in keywords Facet   section ZfN Section A  [X]
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1997 (1)
1987 (1)
1Author    Morikazu Hosoe, Takao Oi, Tadashi Nagumo, Hidetake KakihanaRequires cookie*
 Title    Rubidium Isotope Separation by Constant Current Electromigration in a Cation-exchange Membrane  
 Abstract    Separation of rubidium isotopes (85 Rb, 87 Rb) by electromigration in a cation exchange mem-brane has successfully been carried out in a band operation manner at 25 °C. The migration velocity has been varied from 2.5 to 12.1 cm/h. There existed a wide non-isotope-fractionated zone between the 85 Rb enriched zone at the front and the 85 Rb depleted zone at the rear of the band. The single stage separation factor was about 1.0009 and was independent of the migration velocity, migration length and operation technique at a given temperature. The steepness of the 85 Rb accumulation curves, increased with increasing migration velocity. 
  Reference    Z. Naturforsch. 42a, 606—610 (1987); received March 5 1987 
  Published    1987 
  Keywords    Isotope separation, isotope effect, electromigration, rubidium isotope, ion-exchange membrane 
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 TEI-XML for    default:Reihe_A/42/ZNA-1987-42a-0606.pdf 
 Identifier    ZNA-1987-42a-0606 
 Volume    42 
2Author    Takao Oi, Hirotsugu Takeuchi, Akiko Sakurai, Yoshifumi Taguchi, Morikazu HosoeRequires cookie*
 Title    Boron Isotope Effect in Liquid Chromatography with Boron-specific Resins as Packing Material  
 Abstract    Boron isotope separation by liquid chromatography using boron specific resins with N-methyl glucamine as the functional group was performed. The single-stage separation factor, S, is generally dependent on the resin in the sequence S (free base form resin) > S (F~ form resin) >5 (CP form resin) ^S (Br ~ form resin) for given experimental conditions. This sequence is the same as that of the pH value expected in the resin phase and reasonably understandable by assuming in addition to the predominant four-coordinate species a three-coordinate boron species in the resin phase whose relative abundance increases with decreasing pH. Supporting evidence for three-coordinate species was obtained by 1: B NMR measurements of boric acid-glycerol and boric acid-l,3-propane-diol solutions. 
  Reference    Z. Naturforsch. 52a, 821—827 (1997); received May 23 1997 
  Published    1997 
  Keywords    Boron isotopes, isotope separation, boron specific resin, liquid chromatography, "BNMR 
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 TEI-XML for    default:Reihe_A/52/ZNA-1997-52a-0821.pdf 
 Identifier    ZNA-1997-52a-0821 
 Volume    52