. . . . "Enhancement of toxicity of various POPs in consequence of interaction with dissolved humic substances" . . . . "Humic substances (HS) are ubiquitous natural products of decomposition of dead organic matter. In soil ecology, HS can be divided generally into three groups: humic acids, fulvic acids and humins (insoluble fraction). In the soil environment, HS are present at concentrations up to 10% (dry weight), and up to 200 mg L-1 in pore water. Biological effects of HS can be both of indirect and direct nature. Indirect effects such toxicants and/or nutrient control via interaction with various HS structures have been known for a long time. However, also direct physiological effects such as changes of heat shock proteins expression and biotransformation enzymes activity, or hormone-like effects in animals, have been shown recently. In our previous in vitro study, we described the interaction of 12 HS samples with aryl hydrocarbon receptor (AhR)." . "Enhancement of toxicity of various POPs in consequence of interaction with dissolved humic substances" . "Humic substances (HS) are ubiquitous natural products of decomposition of dead organic matter. In soil ecology, HS can be divided generally into three groups: humic acids, fulvic acids and humins (insoluble fraction). In the soil environment, HS are present at concentrations up to 10% (dry weight), and up to 200 mg L-1 in pore water. Biological effects of HS can be both of indirect and direct nature. Indirect effects such toxicants and/or nutrient control via interaction with various HS structures have been known for a long time. However, also direct physiological effects such as changes of heat shock proteins expression and biotransformation enzymes activity, or hormone-like effects in animals, have been shown recently. In our previous in vitro study, we described the interaction of 12 HS samples with aryl hydrocarbon receptor (AhR)."@en . . . "POPs; soil; dissolved organic matter"@en . "Enhancement of toxicity of various POPs in consequence of interaction with dissolved humic substances"@en . . . "14310" . "P(GP525/08/P464)" . "2"^^ . "Bittner, Michal" . . . "Hilscherov\u00E1, Kl\u00E1ra" . "Giesy, John" . . "3"^^ . "[0E5A4E142702]" . "Enhancement of toxicity of various POPs in consequence of interaction with dissolved humic substances"@en . . . "RIV/00216224:14310/09:00029900!RIV10-GA0-14310___" . "RIV/00216224:14310/09:00029900" . "313295" .