Thermal kinetics in small systems. III. Isotopic effects

1990 ◽  
Vol 93 (9) ◽  
pp. 6585-6588 ◽  
Author(s):  
Cornelius E. Klots
Keyword(s):  
Small Systems ◽  
Thermal Kinetics ◽  
Isotopic Effects

Thermal kinetics in small systems

1989 ◽  
Vol 90 (8) ◽  
pp. 4470-4472 ◽  
Author(s):  
Cornelius E. Klots
Keyword(s):  
Small Systems ◽  
Thermal Kinetics

ISOTOPIC EFFECTS IN XPS SPECTRA OF H2O AND D2O

1987 ◽  
Vol 48 (C9) ◽  
pp. C9-789-C9-792 ◽  
Author(s):  
D. NORDFORS ◽  
S. SVENSSON ◽  
U. GELIUS
Keyword(s):  
Xps Spectra ◽  
Isotopic Effects

Operator Evaluation of Small Systems

1990 ◽  
Vol 82 (8) ◽  
pp. 40-45 ◽  
Author(s):  
William D. Gollnitz ◽  
Barbara Kittle
Keyword(s):  
Small Systems

Precipitation in small systems—II. Mean field equations more effective than population balance

1996 ◽  
Vol 51 (19) ◽  
pp. 4423-4436 ◽  
Author(s):  
S. Manjunath ◽  
K.S. Gandhi ◽  
R. Kumar ◽  
Doraiswami Ramkrishna
Keyword(s):  
Mean Field ◽  
Population Balance ◽  
Field Equations ◽  
Small Systems ◽  
Mean Field Equations

Institutional Alternatives for Small Systems in the 21st Century

2002 ◽  
Vol 94 (4) ◽  
pp. 59-61
Author(s):  
Peter E. Shanaghan ◽  
Janice A. Beecher
Keyword(s):  
21St Century ◽  
Small Systems

Untersuchung von Calciumisotopieeffekten bei heterogenen Austauschgleichgewichten / Investigation of Isotopic Effects of Calcium in Heterogeneous Exchange Equilibria

1972 ◽  
Vol 27 (2) ◽  
pp. 126-133 ◽  
Author(s):  
Klaus Gustav Heumann ◽  
Karl Heinrich Lieser
Keyword(s):  
Separation Factor ◽  
Calcium Concentration ◽  
Isotopic Fractionation ◽  
Ion Source ◽  
Isotopic Effect ◽  
Mass Unit ◽  
Calcium Isotopes ◽  
Heterogeneous Exchange ◽  
Loaded Column ◽  
Isotopic Effects

The following heterogeneous exchange equilibria have been examined for isotopic effects: CaCO3/Ca(aq.)2⊕. Ca-GBHA/Ca(aq.)2⊕ and Ca(Dowex 50)2⊕/Ca(aq.)2⊕ (GBHA = glyoxal-bis (2-hydroxyanil)). The isotopic ratios 44Ca/40Ca and 48Ca/40Ca were determined by means of a mass spectrometer with a thermal ion source. In the system CaCO3/Ca(aq.)2⊕, the elementary separation factor was found to be less than 1‰ or 0,5‰ per mass unit, respectively.For the exchange in the system Ca-GBHA/Ca(aq.)2⊕ in the concentration range from 0.011 to 0.84 M an elementary separation factor less than 1‰ per mass unit was found; from a three-stage experiment at a calcium concentration of 1.23 M it was concluded that the elementary isotopic effect is less than 0.4‰ per mass unit. Therefore no isotopic fractionation is to be expected for precipitation of inorganic or organic calcium salts.An enrichment of the heavier calcium isotopes in the solution was found in the case of the exchange in a Dowex 50-X12 loaded column. The isotopic effect depends on the concentration of the hydrochloric acid used as the eluent.

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