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The mechanism and kinetics of ozone formation in a pulse radiolysis study of the Ar-O2 system

100%

Wojciechowski K. , Sugier D. , Wnorowski K. , Kowalczyk J. , Jówko A.

2005

tom Vol. 50,suppl.2

29-33

The mechanism and kinetics of O3 formation after an electron pulse have been studied in the Ar-O2 systems by time resolved optical measurements at gamma = 260 nm. The second order rate constant of energy transfer from excited Ar(4s,4p) states to O2 molecules: (1) Ar*,Ar** + O2 → O2* + Ar, was found to be (8.9 ± 2.1) x 10-10 cm3 s-1. It was found also the evidence of the third order process contribution to the energy transfer: (2) Ar*,Ar** + Ar + O2 → products, with the rate constant in the range (1.5-3.7) x 10-29 cm6 s-1. The rate constant of the deactivation of excited ozone molecules by O2 was found to be (5.1 ± 0.6) ´ 10-15 cm3 s-1.

The effect of a 6-week plyometric training on explosive power in volleyball players

100%

Jastrzebski Z. , Wnorowski K. , Mikolajewski R. , Jaskulska E. , Radziminski L.

nr 2

Background: The purpose of the present study was to determine the effects of a six-week plyometric high and low-intensity training on the explosive power of lower limbs in volleyball players. Material/Methods: The research was conducted on a sample of 30 volunteers of the Sports Club at Gdansk University of Technology in Gdansk. Before the experiment, the players were divided into two homogeneous groups. After two weeks of an introductory common stage, each group followed a plyometric regime of different intensity. The results showed that the high-intensity program was more efficient than the low-intensity program in developing the explosive power in the volleyball players. Results: The largest significant improvement was observed for the vertical jump with arm swing (11% in HIJG and 3.8% in LISG). The strongest correlations were registered for the maximal power and the total mechanical work obtained in the Wingate test (r=0.83), and the power of jumps during attacks and blocks (r=0.78). Conclusions: The experiment confirmed high effectiveness of the training loads applied in the experiment, in particular in the high-intensity program.

Electron capture negative ion mass spectra of some freon derivatives

86%

Asfandiarov N. , Pshenichnyuk S. , Fal’ko V. , Wnorowska J. , Wnorowski K. , Szamrej-Foryś I.

2003

tom Vol. 48, nr 2

83-88

The temperature dependence of dissociative attachment has been investigated in the temperature range 350-575 K for two freon derivatives 1,1,1-C2H3F2Cl and C2F5Cl using Electron Capture Negative Ion Mass Spectra (ECNI MS). The temperature dependence for 1,1,1-C2H3F2Cl is similar to that observed in the case of CF3Cl reported by Illenberger et al. In contrast, C2F5Cl exhibits quite a different spectrum and its temperature behavior. It has been suggested that sigma*C-Cl delocalization onto two empty orbital leads to Cl- ion formation in two different resonance states.