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Allin, K. H., Nordestgaard, B. G. (2011) Elevated C-reactive protein in the diagnosis, prognosis, and cause of cancer. Crit. Rev. Clin. Lab. Sci. 48, 155

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55 79 90 Lupke, M., Rollwitz, J., Simko, M. (2004) Cell activating capacity of 50 Hz magnetic fields to release reactive oxygen intermediates in

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, A. J. (2003): Role of reactive oxygen species in the response of barley to necrotrophic pathogens. Protoplasma 221 , 137-143. Role of reactive oxygen species in the response of barley to necrotrophic pathogens

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185 Alvarez, M. E., Pennell, R. I., Meijer, P. J., Ishikawa, A., Dixon, R. A. and Lamb, C.(1998): Reactive oxygen intermediates mediate a systemic signal network in the establishment of plant

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611 Apel, K. and Hirt, H. (2004): Reactive oxygen species: metabolism, oxidative stress and signal transduction. Annu. Rev. Plant Biol. 55, 373

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Allan, A. C., Fluhr, R. (1997) Two sources of elicited reactive oxygen species in tobacco epidermal cells. Plant Cell 9 , 1559–1572. Fluhr R

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Acta Biologica Hungarica
Authors: Celestyna Mila-Kierzenkowska, Alina Woźniak, B. Woźniak, G. Drewa, Bogumiła Chęsy, T. Drewa, Ewa Krzyżyńska-Malinowska, and R. Ceraficki

In this study we examined superoxide dismutase (SOD) activity and thiobarbituric acid reactive substances (TBARS) concentration in liver and muscles of four fish species: the carp, the brown trout, the white cod and the flounder. Higher SOD activity and higher TBARS concentration was revealed in the tissues of marine fish in comparison to freshwater fish. The highest SOD activity was observed in the cod while the highest TBARS concentration was in the flounder. The observed differences are probably an effect of the different living mode of the compared fish.

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Sagi, M., Fluhr, R. (2006) Production of reactive oxygen species by plant NADPH oxidases. Plant Physiol. 141 , 336–340. Fluhr R. Production of reactive oxygen species by plant

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Abbreviations Quercetin 2-(3,4-dihydroxyphenyl)-3,5,7-trihydroxy-4H-chromen-4-one ROS reactive oxygen species

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24 Torel, J., Cillard, J., Cillard, P. (1986) Antioxidant activity of flavonoids and reactivity with peroxy radical. Phytochemistry 25, 383

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