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Despite the last decade considerable advances in the study of nitrate and nitrite pollution of soil, there are still some gaps in research related to neglecting or ignoring the role of soil in the food chain and its effects on upper trophic units. The article presents the results of a study on the impact of air and soil humidity and temperature, as well as soil type and utilization on the amount of nitrates and nitrites in the soil solution at the end of vegetation period. It was proved that statistically significant impact on the amounts of residual nitrate and nitrite ions was caused by the temperature and moisture of soil, its type, and the specific properties of the crops grown.

References AMR A., HADIDI N. 2001. Effect of cultivar and harvest date on nitrate (NO3) and nitrite (NO2) content of selected vegetable grown under open field and greenhouse conditions in Jordan. Journal of Food Composition and Analysis 14: 59-67. AYAZ A., TOPCU A., YURTTAGUL M. 2007. Survey of nitrate and nitrite levels of fresh vegetables in Turkey. Journal of Food Technology 5: 177-179. BAKER W. H., THOMPSON T. L. 1992. Determination of nitrate nitrogen in plant samples by selective ion electrode. Plant Analysis Reference Procedures the Southern Region of the

for Food (thirty eighth series), Opinions of the scientific committee for food on: Nitrates and Nitrite, (1997)

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, Marletta MA (1985) Mammalian nitrate biosynthesis: mouse macrophages produce nitrite and nitrate in response to Escherichia coli lipopolysaccharide. Proc Natl Acad Sci U S A   82 : 7738-7742.

. FIN,, accessed on 04.2015. 7. Poste AE, Grung M, Wright RF. Amines and amine-related compounds in surface waters: a review of sources, concentrations and aquatic toxicity. Sci Total Environ. 2014;481:274-279. 8. Bailey SJ, Vanhatalo A, Winyard PG, Jones AM. The nitrate-nitrite-nitric oxide pathway: Its role in human exercise physiology. Eur J Sport Sci. 2012;12:309-320. 9. Radi R. Peroxynitrite, a Stealthy Biological Oxidant. J Biol Chem. 2013


The objective of the paper was assessment of the selected qualities of carrot from retailer's shops, organic and traditional food shops in Krakow. The following quality parameters of the fruit pulp were investigated: content of extract, sugars, polyphenols, nitrite, flavonoids, beta-carotene, colour, and antioxidant activity. The investigation shows that the content of nitrogen (V) in the samples of carrot from traditional cultivations was higher than in case of carrot from organic crops, and in case of a sample from traditional cultivation it exceeds the admissible norms. However, the research which was carried out provides no justification for the statement that the content of nitrate (III) depends on the production system of carrot. The research on the content of polyphenols, flavonoids and antioxidant activity of juice proved the increased antioxidant ability of carrot that was traditionally cultivated with reference to carrot cultivated organically. However, the differences were not statistically confirmed. Beta-carotene content in all samples was comparable regardless the cultivation system. Content of extracts, total carbohydrates and sucrose was significantly higher for carrot from traditional crops than for eco-carrot.

-Martins LA, Michel JL. Stress influence on genesis, onset and maintenance of cardiovascular diseases: literature review. J Adv Nurs 43,548–554, 2003. Gammoh OS, Al-Smadi A, Al-Awaida W, Badr MM, Qinna NA. Increased salivary nitric oxide and G6PD activity in refugees with anxiety and stress. Stress Health 32, 435–440, 2016a. Gammoh OS, Al-Smadi AM, Ashour AF, Al-Awaida W. Salivary nitric oxide, a biomarker for stress and anxiety? Psychiatry Investig 13, 311–315, 2016b. Green, LC, Wagner, DA, Glogowski J, Skipper PL, Wishnok, JS, Tannenbaum SR. Analysis of nitrate, nitrite

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