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Microcalorimetric studies of the biological effect of holmium (III) on Halobacterium halobium R1 growth.

Microcalorimetric studies of the biological effect of holmium (III) on Halobacterium halobium R1 growth.

Authors :
Peng L
Yi L
Xi L
Ping S
Source :
Biological trace element research [Biol Trace Elem Res] 2008 Jan; Vol. 121 (1), pp. 80-6. Date of Electronic Publication: 2007 Nov 27.
Publication Year :
2008

Abstract

The biological effect of Ho3+ on Halobacterium halobium R1 growth was analyzed by a microcalorimetric technique. By means of LKB-2277 Bioactivity Monitor, ampoule method at 37 degrees C, we obtained the thermogenic curves of H. halobium R1 growth. To analyze the results, the maximum power (Pm) and the growth rate constants (k) were determined, which show that values of Pm and k are linked to the concentration of Ho3+. In all, the addition of Ho3+ causes a decrease of the maximum heat production and growth rate constants. For comparison, we observed the shapes of H. halobium R1 cell by means of transmission electron microscope (TEM). According to the thermogenic curves and TEM photos of H. halobium R1 under different conditions, it is clear that metabolic mechanism of H. halobium R1 growth has been changed with the addition of Ho3+.

Details

Language :
English
ISSN :
0163-4984
Volume :
121
Issue :
1
Database :
MEDLINE
Journal :
Biological trace element research
Publication Type :
Academic Journal
Accession number :
18040606
Full Text :
https://doi.org/10.1007/s12011-007-0039-3