title: Antibacterial activities of novel diselenide-bridged bis(porphyrin)s on Staphylococcus aureus investigated by microcalorimetry.
abstract: The actions of two novel diselenide-bridged bis(porphyrin)s (1 and 2) on Staphylococcus aureus growth was investigated by microcalorimetry at 37.00 degrees C, compared with that of Na2SeO3. Differences in their capacities to inhibit the growth metabolism of S. aureus were observed. By analyzing the power-time curves, crucial parameters such as the rate constant of bacterial growth (k), inhibitory rate (I), and generation time (tG) were determined. The growth rate constant (k) of S. aureus (in the log phase) in the presence of the drugs decreased with increasing concentrations of the drugs regularly. The relationship of k and c is nearly linear for diselenide-bridged bis(porphyrin) 2. The sequence of the antibacterial activities of these selenium compounds tested was 2 > 1 > Na2SeO3.
authors.affiliation: State Key Laboratory of Virology, College of Chemistry and Molecular Sciences, Wuhan University, Wuhan, 430072, People's Republic of China.
authors.forename: Xiang-jiao
authors.initials: XJ
authors.lastname: Xu
authors.forename: Zhi
authors.initials: Z
authors.lastname: Xue
authors.forename: Qi
authors.initials: Q
authors.lastname: Xiao
authors.forename: An Xin
authors.initials: AX
authors.lastname: Hou
authors.forename: Yi
authors.initials: Y
authors.lastname: Liu