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Citation: Hou An-Xin, Qu Song-Sheng, Wong Wai-Kwok, Liu Yi. Microcalorimetric Study of the Action of Two Kinds of Lanthanide Monoporphyrinate Complexes on Growth Metabolism of Escherichia Coli[J]. Acta Physico-Chimica Sinica, ;2003, 19(02): 134-138. doi: 10.3866/PKU.WHXB20030209 shu

Microcalorimetric Study of the Action of Two Kinds of Lanthanide Monoporphyrinate Complexes on Growth Metabolism of Escherichia Coli

1.
Department of Chemistry, College of Chemistry and Molecular Science, Wuhan University, Wuhan　430072；Department of Chemistry, Hong Kong Baptist University, Hong Kong

Received Date: 14 June 2002
Available Online: 15 February 2003

The biothermochemical characteristics of the actions of two kinds of cationic lanthanide(III) monoporphyrinate complexes {[Re(TMP)(H2O)3]Cl, Re=Y, Yb, TMP=5,10,15,20 -tetrakis(4’-methoxyphenyl)porphyrin} on growth metabolism of Escherichia coli were studied by means of a LKB-2277 bioactivity monitor at 37 ℃.The maximum power, Pmax; the growth rate constant k1,k2; inhibitive ratio I(％) and half inhibition concentration cI,50 (mg•L-1),respectively, were obtained. Experimental results show that porphyrinate complexes possess the bi-directional biological effection: they stimulate the growth of the E. coli at lower concentration but inhibit the growth at higher concentration. Inhibitory effection of [Yb(TMP)(H2O)3]Cl (cI,50=143 mg•L-1) is stronger than that of [Y(TMP)(H2O)3]Cl.
- Cationic lanthanide(III) monoporphyrinate complexes;　　Microcalorimetriy;Escherichia coli(E.coli);Bi-directional effection;　Thermokinetic parameters
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