Measurement of oxygen recombination rate constants by the piezoelectric method

1987 ◽  
Vol 53 (3) ◽  
pp. 1054-1057 ◽  
Author(s):  
I. E. Zabelinskii ◽  
O. P. Shatalov
Keyword(s):  
Rate Constants ◽  
Recombination Rate

Time-resolved FTIR study of CO recombination with horseradish peroxidase

2008 ◽  
Vol 36 (6) ◽  
pp. 1165-1168 ◽  
Author(s):  
Amandine Maréchal ◽  
W. John Ingledew ◽  
Peter R. Rich
Keyword(s):  
Fourier Transform ◽  
Ir Spectroscopy ◽  
Horseradish Peroxidase ◽  
Rate Constants ◽  
Recombination Rate ◽  
Thermal Equilibrium ◽  
Time Resolved ◽  
Fourier Transform Ir Spectroscopy ◽  
Rapid Scan ◽  
Fourier Transform Ir

Vibrational changes associated with CO recombination to ferrous horseradish peroxidase were investigated by rapid-scan FTIR (Fourier-transform IR) spectroscopy in the 1200–2200 cm−1 range. At pH 6.0, two conformers of bound CO are present that appear as negative bands at 1905 and 1934 cm−1 in photolysis spectra. Their recombination rate constants are identical, confirming that they arise from two substates of bound CO that are in rapid thermal equilibrium, rather than from heterogeneous protein sites. A smaller positive band at 2134 cm−1 also appears on photolysis and decays with the same rate constant, indicative of an intraprotein geminate site involved in recombination or, possibly, a weak-affinity surface CO-binding site. Other signals arising from protein and haem in the 1700–1200 cm−1 range can also be time-resolved with similar kinetics.

The Master Equation for the Dissociation of a Dilute Diatomic Gas. X. How Rotation Causes Low Arrhenius Temperature Coefficients

1973 ◽  
Vol 51 (18) ◽  
pp. 3152-3155 ◽  
Author(s):  
Huw O. Pritchard
Keyword(s):  
Low Temperature ◽  
Temperature Coefficient ◽  
Rate Constants ◽  
Recombination Rate ◽  
Negative Temperature Coefficient ◽  
Negative Temperature ◽  
Equilibrium Form ◽  
Temperature Coefficients ◽  
Recombination Rate Constant ◽  
Arrhenius Temperature

It is shown that previously calculated nonequilibrium rate constants for the dissociation of H2 and D2 appear to approach a rotationally averaged equilibrium expression at low temperature. This equilibrium form of the rate expression itself has an Arrhenius temperature coefficient for dissociation which is significantly less than the dissociation energy, and the corresponding recombination rate constant has a negative temperature coefficient. The reasons for this are explained.

Radiative and non-radiative exciton recombination rate constants in ZnSe clusters

2019 ◽  
Vol 92 (12) ◽  
Author(s):  
Ning Du ◽  
Shengping Yu ◽  
Yujuan Xie ◽  
Yingqi Cui ◽  
Li Zhang ◽  
...  
Keyword(s):  
Rate Constants ◽  
Recombination Rate ◽  
Exciton Recombination

On the effective recombination coefficient in Saturn's ionosphere

2020 ◽  
Author(s):  
Joshua Dreyer ◽  
Erik Vigren ◽  
Michiko Morooka ◽  
Jan-Erik Wahlund ◽  
Stephan Buchert ◽  
...  
Keyword(s):  
Electron Temperature ◽  
Rate Constants ◽  
Recombination Rate ◽  
Negative Ions ◽  
Dissociative Recombination ◽  
Rate Coefficients ◽  
Recombination Coefficient ◽  
Positive Ions ◽  
Electron Production ◽  
Upper Limits

<p>The present study combines RPWS/LP and INMS data from Cassini's orbit 292, which reached an altitude of 1685 km at the lowest point, to constrain the effective recombination coefficient α<sub>300</sub> from measured densities and electron temperatures at a reference electron temperature of 300 K. Assuming photochemical equilibrium at these low altitudes and linking established methods to calculate the electron production rate and the dissociative recombination rate results in a formula to calculate an upper limit for α<sub>300</sub>. This is then compared against rate constants of individual recombination reactions as measured in the laboratory.<br>We derive upper limits for α<sub>300</sub> of ∼ 2.5∗10<sup>-7</sup>cm<sup>3 </sup>s<sup>-1</sup>, which suggest that Saturn's ionospheric positive ions are dominated by species with low recombination rate coefficients. An ionosphere dominated by water group ions or complex hydrocarbons, as previously suggested, is incompatible with this result, as these species have recombination rate constants > 5∗10<sup>-7 </sup>cm<sup>3 </sup>s<sup>-1</sup> at an electron temperature of 300 K. The results do not give constraints on the nature of the negative ions.</p>

Estimation of Three‐Body Recombination Rate Constants

1964 ◽  
Vol 40 (4) ◽  
pp. 1166-1167 ◽  
Author(s):  
Benjamin J. Woznick ◽  
James C. Keck
Keyword(s):  
Rate Constants ◽  
Recombination Rate ◽  
Three Body ◽  
Body Recombination
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