Environmental Influence of Inert Gas on the Hermetic Storage of Unpolished Rice

The swelling of irradiated UO2 has been attributed to the migration and agglomeration of fission gas bubbles in a thermal gradient. High temperatures and thermal gradients obtained by electron beam heating simulate reactor behavior and lead to the postulation of swelling mechanisms. Although electron microscopy studies have been reported on UO2, two experimental procedures have limited application of the results: irradiation was achieved either with a stream of inert gas ions without fission or at depletions less than 2 x 1020 fissions/cm3 (∼3/4 at % burnup). This study was not limited either of these conditions and reports on the bubble characteristics observed by transmission and fractographic electron microscopy in high density (96% theoretical) UO2 irradiated between 3.5 and 31.3 x 1020 fissions/cm3 at temperatures below l600°F. Preliminary results from replicas of the as-polished and etched surfaces of these samples were published.

Download Full-text

Personal Goals of Older Female Twins

European Psychologist ◽

10.1027/1016-9040.14.2.160 ◽

2009 ◽

Vol 14 (2) ◽

pp. 160-167 ◽

Cited By ~ 14

Author(s):

Katariina Salmela-Aro ◽

Sanna Read ◽

Jari-Erik Nurmi ◽

Markku Koskenvuo ◽

Jaakko Kaprio ◽

...

Keyword(s):

Physical Exercise ◽

Independent Living ◽

Environmental Effect ◽

Close Relationships ◽

Environmental Influence ◽

Genetic Effect ◽

Additive Genetic Effect ◽

Personal Goals ◽

Cultural Activities ◽

The Individual

This study examined genetic and environmental influences on older women’s personal goals by using data from the Finnish Twin Study on Aging. The interview for the personal goals was completed by 67 monozygotic (MZ) pairs and 75 dizygotic (DZ) pairs. The tetrachoric correlations for personal goals related to health and functioning, close relationships, and independent living were higher in MZ than DZ twins, indicating possible genetic influence. The pattern of tetrachoric correlations for personal goals related to cultural activities, care of others, and physical exercise indicated environmental influence. For goals concerning health and functioning, independent living, and close relationships, additive genetic effect accounted for about half of the individual variation. The rest was the result of a unique environmental effect. Goals concerning physical exercise and care of others showed moderate common environmental effect, while the rest of the variance was the result of a unique environmental effect. Personal goals concerning cultural activities showed unique environmental effects only.

Download Full-text