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Microcalorimetric study of the action of Yb 3+ ion on the growth of Staphylococcus aureus
Author(s) -
Hou AnXin,
Xue Zhi,
Liu Yi,
Qu SongSheng
Publication year - 2003
Publication title -
chinese journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.28
H-Index - 41
eISSN - 1614-7065
pISSN - 1001-604X
DOI - 10.1002/cjoc.20030210909
Subject(s) - staphylococcus aureus , chemistry , ion , bacterial growth , phase (matter) , isothermal microcalorimetry , bacteria , organic chemistry , thermodynamics , physics , genetics , enthalpy , biology
A microcalorimetric method was used to evaluate the action of Yb 3+ ions on the growth metabolism of Staphylococcus aureus. The power‐time curves of the growth metabolism of Staphylococcus aureus and the action of Yb 3+ ions were obtained by using stopped‐flow method at 37°C. For evaluation of the action, the growth rate constants ( k 1 and k 2 ) for the log phase 1, log phase 2, and the total heat effect ( Q total ) for Staphylococcus aureus were determined. The results show that Yb 3+ ions at low concentrations have the stimulatory effect on Staphylococcus aureus and that Yb* ions at higher concentration could inhibit its growth.