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exchange level
In the second phase, which was associated with further slight changes in the parameters of external respiration, the gas exchange level is restored owing to an adaptive increase in efficiency of oxygen utilization in cells and tissues.
      
Regardless of the Si/Al atomic ratio of zeolite and of the pH of solution, a maximum activity (NO conversion) of the resulting catalyst is attained even at an exchange level (Cu/Al) close to 100% (80-140%).
      
The above exchange level is maximally attainable at pH ~6 in the chosen range of copper acetate concentrations in solution (2-10 mg/ml accounted as CuO).
      
An increase in the pH of ion exchange up to ~100% allows a wider variation in the exchange level and the state of copper in the zeolite with the same range of copper concentration in the solution.
      
However, at Cu/Al ? 100% (up to ~430%), the catalyst activity is independent of the exchange level.
      
It was also found that in the Cu(80% ZSM-5 + 20%Al2O3) catalysts, an exchange level close to that in CuZSM-5 catalysts is attained by ion exchange from more concentrated solutions.
      
An increase in the exchange level to ??100% (by an increase in the pH of a copper solution from ~6 to ~10, as in the case of CuZSM-5 catalysts), had no effect on the activity.
      
The two-step exchanged catalysts provide better performances likely due to the larger RE exchange level obtained with this method.
      
The DHB conversion decreases as increment of degree of Na+ ion-exchange level and of Si content in HZSM-5.
      
The mass splitting of scalar quarks of the same flavour leads to parity violation in deep inelastic scattering, even at one photon exchange level.
      
The exchange level was calculated from the chemical analysis results.
      
The conversion of m-xylene over dealuminated zeolite Y with different sodium exchange level has been studied.
      
The effective ion-exchange level of Cu is above 100%, and some co-cations improve the catalytic activity.
      
Study of the heat exchange level in rabbits vaccinated against tuberculosis (by direct and indirect calorimetry)
      
The catalytic activities of iron ion-exchanged zeolites depended on the zeolite structure and the iron ion exchange level.
      
The activity of iron ion-exchanged mordenite increased with the increment in the exchange level and levelled off above about 60%.
      
The effects of Na exchange level in H-Y zeolite and high temperature calcination for H-Mordenite have also been examined.
      
Na-Y zeolite was cation exchanged with Ru(NH3)6Cl3 yielding at 25% exchange level a light-purple solid which was active in ammonia synthesis at atmospheric pressure.
      
It was verified that the CuMFI deactivation extent is higher on H-form zeolite compared to Na-form and decreases when the copper exchange level increases, which can be achieved either by increasing the zeolite Si/Al ratio or the copper content.
      
Attention is focused on investigating the role played by the fermionic vacuum polarization inside the bags in the dynamics of the system; the bosonic field interrelating the bags is taken into account only at the one-meson exchange level.
      
 

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