A microcalorimetric assay of tetrahymena thermophila for assessing tributyltin acute toxicity

Chen, X. J.; Feng, Wei; Yu, Yongjie; Shen, Yin; Wan, Chuanling; Peng, Jiantang

doi:10.1007/s10973-007-8851-8

Cited by 13 publications

(2 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…With the development of the microcalorimetry, it has been used widely to monitor the growth metabolism of many living organisms and applied in many fields, such as physiology, pharmacology, ecology, and environmental sciences [2][3][4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Studies on the nongrowth metabolism of the different strains of Tetrahymena cells by isothermal microcalorimetry

Chen

Feng

2013

J Therm Anal Calorim

View full text Add to dashboard Cite

The nongrowth metabolic processes of Tetrahymena strains with the different cell densities were monitored by isothermal microcalorimetry, including Tetrahymena thermophila BF 1 , Tetrahymena thermophila SB210, Tetrahymena pyriformis GL, the mixed cells of T. thermophila BF 1 and T. thermophila SB210, and the mixed cells of T. thermophila BF 1 and T. pyriformis GL. All the typical power-time curves showed a decreasing trend on the whole. It was found that total heat production (Q t ) and maximum heat output (P m ) decreased significantly with the decrease of cell density. Cell density did not influence significantly the maximum heat output per cell (P cell ) of Tetrahymena cells, which was probably due to enough oxygen. The P cell and metabolic decrease rate constant (K) values for the mixture of T. thermophila BF 1 and T. pyriformis GL, and that of T. thermophila BF 1 and T. thermophila SB210 were similar to the mean values of P cell and K for the corresponding single Tetrahymena strain, respectively. It was speculated that the cell mixing did not possibly influence significantly their P cell and K values because of no competition for nutrition, oxygen, and room, and the low conjunction percentages.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Besides, the growth metabolism of Tetrahymena has been studied by microcalorimetry [5,6]. The present study aims to record the heat production during the nongrowth metabolic processes of the different strains of Tetrahymena cells.…”

Section: Introductionmentioning

confidence: 99%

Studies on the nongrowth metabolism of the different strains of Tetrahymena cells by isothermal microcalorimetry

Chen

Feng

2013

J Therm Anal Calorim

View full text Add to dashboard Cite

show abstract

Combination of Silica Sol and Potassium Silicate via Isothermal Heat Conduction Microcalorimetry

et al. 2011

View full text Add to dashboard Cite

Isothermal heat conduction microcalorimetry was utilized as a novel characterization method to investigate the polymerization processes of silica with both thermodynamic and kinetic parameters when the combination of silica sol and potassium silicate was stirred at temperatures of 25.0, 35.0, and 45.0 ℃. The silica polymerization was characterized by the greater enthalpy change at each higher temperature and by the reaction orders of the silica sol and potassium silicate, which varied rapidly, instantaneously, and constantly from low to high all the time, up and down in an alternate manner. When the reaction order of the silica sol and potassium silicate was 3.0, the maximum rate constant occurred at 25.0 ℃ (k＝1.22×10-4 mol -2 •dm 6 •s -1 ). The two temperature regions (25.0-35.0 ℃ region with a faster rate and 35.0-45.0 ℃ region with a lower rate) reflected a two-stage oligomerization of silica monomers with different oligomers formed in a two-step anionic mechanism. The measurements of particle size and pH value showed that the colloidal particles in the mixed silica sol and potassium silicate first dissolved, then "active" silica in the potassium silicate redeposited to make a distinct particle size distribution (Z-average size, 33.0-14.9 nm at 25.0 ℃) influenced both by pH value (9.82-11.97 at 25.0 ℃) and the mass fraction (53, 65, 75, and 85 mass/%) of the silica sol in the mixture. The processes of combination of the silica sol and potassium silicate did not result from acid-base neutralization reactions but from a complex polymerization of the "active" silica components which relate to silica monomers oligomerization with heat evolved (the total enthalpy changes, 1.6234-3.3882 J).

show abstract

Effect of berberine alkaloids on Bifidobacterium adolescentis growth by microcalorimetry

Yan¹,

Han

Wei³

et al. 2009

J Therm Anal Calorim

View full text Add to dashboard Cite

A microcalorimetric assay of tetrahymena thermophila for assessing tributyltin acute toxicity

Cited by 13 publications

References 22 publications

Studies on the nongrowth metabolism of the different strains of Tetrahymena cells by isothermal microcalorimetry

Studies on the nongrowth metabolism of the different strains of Tetrahymena cells by isothermal microcalorimetry

Combination of Silica Sol and Potassium Silicate via Isothermal Heat Conduction Microcalorimetry

Effect of berberine alkaloids on Bifidobacterium adolescentis growth by microcalorimetry

Contact Info

Product

Resources

About