Authors:Z. Xiancheng, N. Zhaodong, X. Yan, Z. Yuanqin, and Z. Honglin
The power-time curves of two species of bacteria, Vibro metschnikovii, Vibro bollisae were determined calorimetrically by using a 2277 bioactivity monitor. The power-time curve equation of bacterial growth in the log phase can be expressed as
. A linear equation,
i+1, was obtained by using the self-function recursion equation. The rate constants of bacterial growth k1, the time constant of the calorimeter k, the generation times G, and the pre-exponential factors A were obtained from the power—time curve equations.Power—time curve equations of bacterial growth in the log phase are expressed for V.metschnikovii as =1.05(e0.0228t–e–0.0175t), and for V. bollisae as =1.58(e0.0278t–e–0.0170t).
Authors:Z. Honglin, S. Haitao, N. Zhaodong, and L. Yongjun
The thermal curves ofB. subtilis andP. atruginosa were determined by using a 2277 Thermal Activity Monitor (Sweden). Under inhibitory conditions, an experimental model of
bacterial growth was established. The growth rate constant (μ), deceleration rate constant (β) and optimum temperature (T) of bacterial growth were calculated.
Authors:Y. Li, G. Fei, Z. Honglin, L. Zhen, Z. Liqiang, and L. Ganzuo
The power–time curves of micellar formation of two anionic surfactants, sodium laurate (SLA) and sodium dodecyl sulfate (SDS),
in N,N-dimethyl acetamide (DMA) in the presence of various long-chain alcohols (1-heptanol, 1-octanol, 1-nonanol and 1-decanol)
were measured by titration microcalorimetry at 298 K. The critical micelle concentrations (CMCs) of SLA and SDS under various
conditions at 298 K were obtained based on the power–time curves. Thermodynamic parameters (
) for micellar systems at 298 K were evaluated according to the power–time curves and the mass action model. The influences
of the number of carbon-atom and the concentration of alcohol were investigated. Moreover, combined the thermodynamic parameters
at 303, 308 and 313 K in our previous work and those of 298 K in the present work for SLA and SDS in DMA in the presence of
long-chain alcohols, an enthalpy–entropy compensation effect was observed. The values of the enthalpy of micellization calculated
by direct and indirect methods were made a comparison.
Authors:Z. Honglin, Y. Xiufang, Y. Li, L. Fenghua, N. Zhaodong, and S. Haitao
The power–time curves of a biological oscillation system were determined for different temperatures, acidities and carbon
sources, by using a 2277 thermal activity monitor. The apparent activation energy and order of the oscillation reaction were
calculated from the induction period (tin) and the first oscillation period (tp). The regularity of the biological oscillation system is discussed.
Authors:Z. Honglin, Y. Xiufang, L. Xiangyang, S. Haitao, N. Yi, W. Lili, and L. Chengxue
The power–time curves of the oscillating extraction system were determined at different temperatures for the extraction of
hydrochloric acid and acetic acid with primary amine N1923 (R–CH(NH2)–R1), R, R1 represent alkyl of C9–11 in chloroform using the titration microcalorimetric method. The apparent activation energy was calculated from the induction
period (tin), the first oscillation period (tp.1) and the second oscillation period (tp.2).