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physiological parameters' level in men during graded exercise. Ann Univ Mariae Curie-Sklodowska [Med] 2007; LXII , Suppl XVIII(6):440-3. Tyka A, Żuchowicz A, Kubica R. Effect of ambient temperature on mechanical power at anaerobic threshold. Med Sci Sports Exerc 2000;32(5):155. Wasserman K, Beaver WL, Whipp BJ. Gas exchange theory and the lactic acidosis (anaerobic threshold). Circulation 1990;81(Suppl II):14-30. Glass SC, Knowlton RG, Sanjabi PB, Sullivan JJ. Identifying the electromyographic threshold using different muscle during incremental cycling exercise. J

materii w zlewniach rzecznych (Water resources and water protection. Water and matter cycling in river basins), FRUG, Gdańsk: 274-279 (in Polish, English summary). Kasprzyk A., Kupczyk E., 1998, Ocena podatności zlewni rzecznej na występowanie niżówek o znacznym deficycie odpływu (Vulnerability Estimation of River Catchment System to Severe Hydrological Droughts Appearance), [in:] Magnuszewski A., Soczyńska U. (eds), Hydrologia u progu XXI wieku (Hydrology at the threshold of the 21st century), Wyd. Retro-Art, Warszawa: 157-165 (in Polish, English summary). Ozga

test object to assess digital mammography systems. In K. C. Young, A. Alsager, J. M. Oduko, H. Bosmans, B. Verbrugge, T. Geertse, & R. van Engen (Eds.), Medical Imaging 2008: Physics of medical imaging . Proceedings of SPIE (vol. 69131C). DOI: 10.1117/12.770571. 8. Van Metter, R., Heath, M., & Fletcher-Heath, L. (2006). Applying the European protocol for the quality control of the physical and technical aspects of mammography screening threshold contrast visibility assessment to digital systems. In M. J. Flynn, & J. Hsieh (Eds.), Medical Imaging 2006: Physics of

). Physiological variables such as maximal oxygen uptake (VO 2max ) ( Ehrström et al., 2017 ; Fornasiero et al., 2017 ; Giovanelli et al., 2016 ) and running economy (RE) are important factors in predicting trail race performance ( Lazzer et al., 2015 ; Scheer et al., 2018 c; Vernillo et al., 2015 ). In endurance running, performance prediction is well established and the classical model has been accepted widely including variables such as VO 2max , percentage of VO 2max (% VO 2max ), ventilatory thresholds (VT) and running economy (RE) ( Barnes and Kilding, 2015 ; Larsen

curve for post-TACE baseline Lipiodol uptake, an estimated threshold Lipiodol uptake value of 270.2 HU was identified below which there was a high probability of tumor recurrence and above which there was a high probability of tumor response over the mean follow-up time of 5.6 months with a sensitivity of 95% and specificity of 93% ( Figure 3 ). Comparison of the cumulative hazards of tumor recurrence over the follow-up period also showed significantly higher hazards of recurrence in tumors with Lipiodol uptake < 270.2HU after TACE ( Figure 4 ; P < 0.0001). ROC curve

References Klusiewicz, A., Trzaskoma Z., Borkowski L. & Starczewska-Czapowska J. (2004). An assessment of the specific, exertion-related abilities of first-rate of skiers, runners and biatheletes. Wych. Fiz. Sport 48(3), 207-214. [in Polish] Larsson, P., Olofsson P., Jakobsson E., Burlin L. & Henriksson-Larsén K. (2002). Physiological predictors of performance in cross-country skiing from treadmill tests in male and female subjects. Scand. J. Med. Sci. Sports 12(6), 347-353. Klusiewicz, A. & Zdanowicz R. (2002). The anaerobic threshold and the state of

.J., Antkiewicz-Michaluk L., Czuczwar S.J.: Isobolographic analysis of interactions between 1-methyl-1,2,3,4-tetrahydroisoquinoline and four conventional antiepileptic drugs in the mouse maximal electroshock-induced seizure model. Eur. J. Pharmacol., 602, 298, 2009. 9. Łuszczki J.J., Czuczwar S.J.: How significant is the difference between drug doses influencing the threshold for electroconvulsions? Pharmacol. Rep., 57, 782, 2005. 10. Łuszczki J.J., Czuczwar S.J.: Isobolographic characterization of interactions between vigabatrin and tiagabine in two experimental models of

. Sports Med, 2007; 37: 575-586 Berthon P, Fellmann N. General review of maximal aerobic velocity measurement at laboratory. Proposition of a new simplified protocol for maximal aerobic velocity assessment. J Sports Med Phys Fitness, 2002; 42: 257-266 Castagna C, Impellizzeri FM, Chauachi A, Manzi V. Pre-Season Variations in Aerobic Fitness and Performance in Elite Standard Soccer Players: a Team-Study. J Strength Cond Res, 2013; 27(11): 2959-65 Davis HA, Bassett J, Hughes P, Gass GC. Anaerobic threshold and lactate turnpoint. Eur J Appl Physiol Occup Physiol, 1983; 50

Percolation thresholds in temperature dependence of electric conductivity of collagen films

Temperature measurement of electrical conductivity s were carried out from 395 to 543 K. The obtained dependence indicates an increase in s. The temperature dependence of the electrical conductivity allowed to observe the release of the free water, bound water and structural water. Studies on electric conductivity of collagen indicate the occurrence of percolation threshold, which comprises free release of water and change its properties from semiconducting to dielectric one.

R eferences [1] L.W. Beineke, Derived graphs and digraphs , in: Beitrage zur Graphentheorie, H. Sachs, H.-J. Voss, H.-J. Walter (Ed(s)), (Leipzig, Teubner, 1968) 17–33. [2] J.C. Bermond and J.C. Meyer, Graphs representatif des arêtes d’un multigraphe , J. Math. Pures Appl. 52 (1973) 299–308. [3] V. Chvátal and P.L. Hammer, Set-Packing and Threshold Graphs (Comp. Sci. Dept. Univ. of Waterloo, Ontario, 1973). [4] D.G. Degiorgi and K. Simon, A dynamic algorithm for line graph recognition , Lect. Notes in Comput. Sci. 1017 (1995) 37–48. doi:10