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Preparation, Purification, and Characterization of Lanthanide Complexes for Use as Contrast Agents for Magnetic Resonance Imaging
Published on: July 21, 2011
COMPARATIVE STUDIES ON RESPIRATION : XIV. ANTAGONISTIC ACTION OF LANTHANUM AS RELATED TO RESPIRATION
1Laboratory of Plant Physiology, Harvard University, Cambridge.
The Journal of General Physiology
|October 30, 2009
Summary
Lanthanum nitrate impacts Bacillus subtilis respiration, with low concentrations increasing the rate and higher concentrations decreasing it. It effectively antagonizes sodium chloride, requiring minimal lanthanum nitrate for maximum effect.
Area of Science:
- Microbiology
- Biochemistry
- Environmental Science
Background:
- The effect of lanthanum nitrate on microbial respiration is not well understood.
- Understanding ion interactions is crucial for microbial physiology and environmental studies.
Purpose of the Study:
- To investigate the impact of lanthanum nitrate concentrations on Bacillus subtilis respiration.
- To explore the antagonistic effects of lanthanum nitrate with sodium chloride and calcium chloride.
Main Methods:
- Bacillus subtilis respiration rates were measured at various lanthanum nitrate concentrations.
- Antagonism studies were conducted by varying the ratios of lanthanum nitrate to sodium chloride and calcium chloride.
Main Results:
- Lanthanum nitrate at 0.000006 M increased Bacillus subtilis respiration; higher concentrations decreased it.
- Significant antagonism was observed between lanthanum nitrate and sodium chloride.
- Very slight antagonism was noted between lanthanum nitrate and calcium chloride.
Conclusions:
- Lanthanum nitrate exhibits a dose-dependent effect on Bacillus subtilis respiration.
- Lanthanum nitrate effectively counteracts the effects of sodium chloride on bacterial respiration.
- The findings highlight the complex ionic interactions influencing microbial metabolic processes.
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