results based on the results obtained by the applied technique, the presence of carcinogenic compounds, n-nitrosomethyl-vinylamine (162 µg/g), n-nitrosonornicotine (6.3 µg/g), and acetaldehyde (117 µg/g) was confirmed in the sample. objectives the current study aimed to chemically analyze, separate and measure the existing substances in a type of chewing tobacco. materials and methods in the cu...

in this study, three stations of the north persian gulf were analyzed in order to determinethe effect of trophic levels on the concentration of harmful pahs in fish and sediment. in all cases,similar distributions were observed in which benzo(a)pyrene largely predominated andbenzo(b)fluoranthene and pyrene were the second major compounds in fish tissues. the predominantcomponents of pahs in sed...