Microcalorimetric Study of the Biological Effects of Zn 2+  on  Bacillus thuringiensis  Growth | Zendy

Yao Jun | Zendy; Liu Yi | Zendy; Gao ZhenTing | Zendy; Liu Peng | Zendy; Sun Ming | Zendy; Zou Xue | Zendy; Qu SongSheng | Zendy; Yu ZiNiu | Zendy

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Microcalorimetric Study of the Biological Effects of Zn 2+ on Bacillus thuringiensis Growth

Author(s) -

Yao Jun,

Liu Yi,

Gao ZhenTing,

Liu Peng,

Sun Ming,

Zou Xue,

Qu SongSheng,

Yu ZiNiu

Publication year - 2002

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.20020200808

Subject(s) - bacillus thuringiensis , chemistry , isothermal microcalorimetry , growth rate , bacterial growth , bacillaceae , metabolism , biochemistry , bacteria , enthalpy , thermodynamics , bacillus subtilis , genetics , physics , geometry , mathematics , biology

A microcalorimetric technique was used to investigate the influence of Zn 2+ on the growth metabolism of Bacillus thuringiensis . LKB‐2277 Bioactivity Monitor was employed to obtain the power‐time curves, from which the maximum peak‐heat output power ( P max ) in the log phase, the growth rate constants ( k ), the inhibitory ratios ( I ), the generational time ( t G ) and the total heat effect ( Q total ) in 23 h for the growth metabolism of Bacillus thuringiensis at 28 °C can be evaluated. The results indicate that the concentration of Zn 2+ affects its growth obviously. Low concentration (0–50 μg/mL) of Zn 2+ promotes the growth of Bacillus thuringiensis while high concentration (50–500 μg/mL) of Zn 2+ inhibits its growth. When the concentration reached up to 600 μg/mL, it can not grow at all.

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