Effect of uranium (VI) on the growth of yeast and influence of metabolism of yeast on adsorption of U (VI)

Sakamoto, Fuminori; Onuki, Toshihiko; Kozai, Naofumi; Wakai, Eiichi; Fujii, Tsutomu*; Iefuji, Haruyuki*; Francis, A. J.

Journal of Nuclear and Radiochemical Sciences, 6(1), p.99 - 101, 2005/07

https://doi.org/10.14494/jnrs2000.6.99

We have carried out the growth experiments of 3 strains of yeast in a medium containing uranium (VI) to elucidate the effect of U (VI) on the growth of microorganisms. Hansenula fabianii J640 grew in the liquid medium containing 0.1 mM U (VI) at lower rate than the control, but Saccharomyces cerevisiae did not grow under this condition. The H. fabianii J640 pre-cultured for 21 h in the liquid medium without U (VI) grew even after the exposure to 1 mM U (VI), but did not grow without pre-cultivation. For the pre-cultured H. fabianii J640, radioactivity of U in the medium was the same as the initial one for 110 h, and then gradually decreased. TEM-EDS analysis of H. fabianii J640 exposed to 1 mM U (VI) for 165 h showed accumulation of U (VI) on the cells. When H. fabianii J640 was not pre-cultured, radioactivity of U in the medium was lower than the initial one. These results indicated that U (VI) inhibits the growth of yeast, and that the adsorption of U (VI) by the cells depends on the metabolism of yeast.

Speciation study on uranium(VI) hydrolysis at high temperatures and pressures

Kirishima, Akira; Kimura, Takaumi; Tochiyama, Osamu*; Yoshida, Zenko

Journal of Alloys and Compounds, 374(1-2), p.277 - 282, 2004/07

https://doi.org/10.1016/j.jallcom.2003.11.105

no abstracts in English

Extraction of uranium(VI) and lanthanide(III) ions into supercritical carbon dioxide fluid containing -diketone and tributylphosphate

Meguro, Yoshihiro; Iso, Shuichi; Ogiyanagi, Jin; Yoshida, Zenko

Analytical Sciences (CD-ROM), 17(Suppl.), p.721 - 724, 2002/03

no abstracts in English

Chemometric and computer-intensive techniques for speciation

Meinrath, G.; Kimura, Takaumi; Kato, Yoshiharu; Yoshida, Zenko; Lis, S.*

Proceedings of OECD/NEA Workshop on Evaluation of Speciation Technology, p.347 - 354, 1999/00

no abstracts in English

Pressure-dependence of extraction equilibrium of uranium and plutonium ions in a HNO/supercritical CO-tributyl phosphate system

Meguro, Yoshihiro; ; *; Takeishi, Hideyo; Sasaki, Takayuki*; Yoshida, Zenko

Proc. of Int. Trace Analysis Symp. '98 (ITAS'98), p.25 - 26, 1998/00

no abstracts in English

Extraction of uranium(VI) in nitric acid solution with supercritical carbon dioxide fluid containing tributylphosphate

Meguro, Yoshihiro; ; Takeishi, Hideyo; Yoshida, Zenko

Radiochimica Acta, 75(4), p.185 - 191, 1996/00

https://doi.org/10.1524/ract.1996.75.4.185

no abstracts in English

Carbonate complexation of the uranyl(VI)ion

G.Meinrath*; Kimura, Takaumi

Journal of Alloys and Compounds, 202, p.89 - 93, 1993/00

https://doi.org/10.1016/0925-8388(93)90523-P

no abstracts in English

Potentiometric titration of free acid, uranium (IV), (VI) and hydrazine mononitrate in uranous nitrate solutions with alkali

; ;

Bunseki Kagaku, 18(8), p.976 - 980, 1969/00

https://doi.org/10.2116/bunsekikagaku.18.976

no abstracts in English

U(VI) sorption on illite in the presence of carbonate studied by cryogenic time-resolved laser fluorescence spectroscopy and parallel factor analysis; Comparison with trivalent lanthanides

Mei, H.; Aoyagi, Noboru; Saito, Takumi*; Sugiura, Yuki; Ishidera, Takamitsu; Tanaka, Kazuya; Tachi, Yukio

no journal, ,