A Flow Micro Reaction Calorimeter.

Monk, Paul R.; Wadsö, Ingemar; Karvonen, Pertti; Virtanen, Artturi I.; Paasiv́irta, Jaakko

doi:10.3891/acta.chem.scand.22-1842

Cited by 350 publications

(93 citation statements)

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“…These were made using a heat conduction flow microcalorimeter (LKB 10700-1) based on a design by and Monk & Wadso (1968). In one experiment, the yeast suspension was pumped from the culture vessel at a constant flow rate of 80 ml/h to a T-piece, where it was mixed with a constant flow of air (80 ml/h) and thence into the stainless-steel flow cell (vol.…”

Section: Aiial?~ticul Tmtlzodsmentioning

confidence: 99%

Respiratory Oscillations and Heat Evolution in Synchronously Dividing Cultures of the Fission Yeast Schizosaccharomyces pombe 972h-

Poole

Lloyd

Кемп

1973

Journal of General Microbiology

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S U M M A R YLarge-scale synchronous cultures of the fission yeast Schizosaccharot?iyces/ionzbe 972h-were prepared by a sedimentation-velocity selection method in a zonal rotor.Oxygen uptake was measured polarographically on samples withdrawn at frequent intervals from the culture vessel. Rates of oxygen uptake, expressed per ml culture, increased exponentially, doubling over each cell cycle, but rose to maxima twice per cycle, once during cell division and once at approximately one-half of the cycle. Oxygen uptake at the maxima was stimulated by carbonyl-cyanide m-chlorophenyl hydrazone; that at the troughs was insensitive to this compound. Oxygen uptake was inhibited at all points in the cycle by antimycin A and cyanide at low concentrations; inhibition by these compounds did not alter the periodicity of the oscillations.Heat evolution increased at a constant rate during two cycles of synchronous growth, but in the presence of carbonyl-cyanide m-chlorophenyl hydrazone, peaks of heat evolution in phase with peaks of oxygen uptake were observed. The discontinuous respiratory activity of mitochondria through the cell cycle is discussed with reference to previous contrasting data, and possible control mechanisms are suggested .

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Section: Aiial?~ticul Tmtlzodsmentioning

confidence: 99%

Respiratory Oscillations and Heat Evolution in Synchronously Dividing Cultures of the Fission Yeast Schizosaccharomyces pombe 972h-

Poole

Lloyd

Кемп

1973

Journal of General Microbiology

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“…(12,13) The excess molar enthalpies as a function of composition were measured by using an LKB 2107 flow microcalorimeter (LKB, Bromma, Sweden) as described by Monk and Wadso. (14) The estimated uncertainty of the measured H E m values is ± 1 per cent.…”

Section: Methodsmentioning

confidence: 99%

Excess molar enthalpies of mixing of (2-butanol + benzene, or toluene, or o-, or m-, or p-xylene) at the temperature 308.15 K

Bhardwaj

Singh

Maken

1999

The Journal of Chemical Thermodynamics

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“…Uncertainties in the measured V" values were about 0.5%. Molar excess enthalpies, H E , at 298.15 and 308.15 K were determined by an LKB flow microcalorimeter LKB-2107 (M/s LKB, Broma, Sweden) in the manner described by Monk and Wadso (10). The precision and stability of the instrument in terms of temperature is 0.1 K and 20.01 K/24 h, respectively.…”

Section: Methodsmentioning

confidence: 99%

Thermodynamic investigation of molecular complexation in binary acetone + bromoform mixture

Dahiya¹,

Singh²,

Dagar³

1988

Can. J. Chem.

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Molar excess volumes, VE, and molar excess enthalpies, HE, have been measured for acetone (A) + bromoform (B) mixtures at 298.15 and 308.15 K. Results of these measurements suggest the formation of a 1:1 acetone–bromoform molecular complex. The equilibrium constant, K, the enthalpy of formation, ΔH, of the AB complex as also the molar volume change, ΔV, accompanying the complexation reaction [Formula: see text] have been evaluated from the measured HE and VE data. The K value so obtained has further been substantiated by the K value determined for the AB molecular entity from nmr studies on this mixture. Partial molar enthalpy of B (at infinite dilution) in A and vice versa have also been evaluated from the measured HE data at 298.15 K and used to calculate a consistent molar enthalpy of AB complex formation.

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A Flow Micro Reaction Calorimeter.

Cited by 350 publications

References 0 publications

Respiratory Oscillations and Heat Evolution in Synchronously Dividing Cultures of the Fission Yeast Schizosaccharomyces pombe 972h-

Respiratory Oscillations and Heat Evolution in Synchronously Dividing Cultures of the Fission Yeast Schizosaccharomyces pombe 972h-

Excess molar enthalpies of mixing of (2-butanol + benzene, or toluene, or o-, or m-, or p-xylene) at the temperature 308.15 K

Thermodynamic investigation of molecular complexation in binary acetone + bromoform mixture

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