Uptake of Heavy Water and Loss by Tangerine in the Heavy Water Vapor Release Experiment in a Greenhouse as a Substitute for Tritiated Water

2005 ◽  
Vol 48 (1) ◽  
pp. 775-778 ◽  
Author(s):  
Y. Ichmasa ◽  
E. Sasajima ◽  
H. Makihara ◽  
H. Tauchi ◽  
T. Uda ◽  
...  
Keyword(s):  
Water Vapor ◽  
Heavy Water ◽  
Tritiated Water ◽  
Release Experiment

HYDROGEN EXCHANGE BETWEEN CELLULOSE AND WATER: I. MEASUREMENT OF ACCESSIBILITY

1961 ◽  
Vol 39 (10) ◽  
pp. 1934-1943 ◽  
Author(s):  
O. Sepall ◽  
S. G. Mason
Keyword(s):  
Surface Roughness ◽  
Water Vapor ◽  
Relative Humidity ◽  
Heavy Water ◽  
Hydrogen Exchange ◽  
Amorphous Material ◽  
Tritiated Water ◽  
Improved Method ◽  
Amorphous Fraction ◽  
Good Agreement

Estimates of the extent of the hydrogen exchange reaction between cellulose and water vapor determined by an improved method using tritiated water and by the use of heavy water were usually in good agreement. With certain samples, surface roughness had a small effect upon the measurement of tritium radioactivity in cellulose.The accessibility or limiting extent of the exchange increased slightly with relative humidity in the range 20 to 100% and was attributed to the reduction of crystalline order reported recently in similar experiments.In contrast to cellulose whose accessibility corresponds approximately to the amorphous fraction, a partially crystalline amylose was 100% accessible while an amorphous xylan was 52% accessible, indicating that in these substances the accessibility and the fraction of amorphous material are not identical.

Organically Bound Deuterium in Rice and Soybean After Exposure to Heavy Water Vapor as a Substitute for Tritiated Water

2002 ◽  
Vol 41 (3P2) ◽  
pp. 393-398 ◽  
Author(s):  
Michiko Ichimasa ◽  
Caiyun Weng ◽  
Tetsuki Ara ◽  
Yusuke Ichimasa
Keyword(s):  
Water Vapor ◽  
Heavy Water ◽  
Tritiated Water

Study on Kinetics of Reaction between ZrNi5 and Water Vapor

2012 ◽  
Vol 581-582 ◽  
pp. 694-697
Author(s):  
Yong Yao ◽  
De Li Luo ◽  
Zhi Yong Huang ◽  
Jiang Feng Song
Keyword(s):  
Water Vapor ◽  
Reaction Rate ◽  
Arrhenius Equation ◽  
Tritiated Water ◽  
First Order ◽  
Order Chemical Reaction ◽  
First Order Chemical Reaction ◽  
Kinetics Of Reaction ◽  
Reaction Activation Energy ◽  
Kinetics Of

In order to evaluate the feasibility of tritium recovery from tritiated water by thermochemical decomposition using ZrNi5, the kinetics of reaction between ZrNi5 and water vapor was studied by thermogravimetric method in the temperature range from 673K to 823K. The result shows that reaction rate increased significantly with the increasing of temperature and H2O concentration; the reaction mechanism for ZrNi5 can be described by the first-order chemical reaction, and the reaction is first order for H2O concentration. The reaction activation energy of ZrNi5 is 55.8kJ/mol calculated from the Arrhenius equation.

Study for the Behavior of Tritiated Water Vapor on Organic Materials

2007 ◽  
Vol 52 (3) ◽  
pp. 696-700 ◽  
Author(s):  
Kazuhiro Kobayashi ◽  
Takumi Hayashi ◽  
Hirofumi Nakamura ◽  
Toshihiko Yamanishi ◽  
Yasuhisa Oya ◽  
...  
Keyword(s):  
Water Vapor ◽  
Organic Materials ◽  
Tritiated Water

Stratospheric profiles of heavy water vapor isotopes and CH3D from analysis of the ATMOS Spacelab 3 infrared solar spectra

1991 ◽  
Vol 96 (D1) ◽  
pp. 1057 ◽  
Author(s):  
C. P. Rinsland ◽  
M. R. Gunson ◽  
J. C. Foster ◽  
R. A. Toth ◽  
C. B. Farmer ◽  
...  
Keyword(s):  
Water Vapor ◽  
Heavy Water
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