Sorption and desorption phenomena in tobacco. I. Specific surface area and specific pore volume distribution of tobacco.
نویسندگان
چکیده
منابع مشابه
Tobacco-specific nitrosamines in new tobacco products.
New tobacco products, designed to attract consumers who are concerned about the health effects of tobacco, have been appearing on the market. Objective evaluation of these products requires, as a first step, data on their potentially toxic constituents. Tobacco-specific nitrosamines (TSNAs) are an important class of carcinogens in tobacco products, but virtually no data were available on their ...
متن کاملAge Specific Reference Levels of Serum Prostate-Specific Antigen, Prostate Volume and Prostate Specific Antigen Density in Healthy Iranian Men
Background: It is relevant to highlight that there is not a precise and perfect report on either 95 percentile value (upper limit of normal range) or on appropriate reference intervals for serum PSA in Iranian population. Objective: To determine age-specific reference ranges for serum prostate-specific antigen (PSA) concentration and PSA density (PSAD) and prostate volumes in a population of he...
متن کاملTobacco-specific nitrosamines, an important group of carcinogens in tobacco and tobacco smoke.
Tobacco-specific nitrosamines are a group of carcinogens that are present in tobacco and tobacco smoke. They are formed from nicotine and related tobacco alkaloids. Two of the nicotine-derived nitrosamines, NNK and NNN, are strong carcinogens in laboratory animals. They can induce tumors both locally and systemically. The induction of oral cavity tumors by a mixture of NNK and NNN, and the orga...
متن کاملAssessment of tobacco-specific N-nitrosamines in tobacco products.
lengthy enrichment procedures in earlier studies. The highly sensitive and specific TEA (7) simplifies the quantitative deter mination of nitrosamines, in that these nonvolatile compounds need only be concentrated once prior to separation by HPLC and detection. For an accurate measurement of these nitrosamines in chew ing tobacco, tobacco leaves, and unaged smoke, extraction procedures as well ...
متن کاملAlaska Native smokers and smokeless tobacco users with slower CYP2A6 activity have lower tobacco consumption, lower tobacco-specific nitrosamine exposure and lower tobacco-specific nitrosamine bioactivation.
Nicotine, the psychoactive ingredient in tobacco, is metabolically inactivated by CYP2A6 to cotinine. CYP2A6 also activates procarcinogenic tobacco-specific nitrosamines (TSNA). Genetic variation in CYP2A6 is known to alter smoking quantity and lung cancer risk in heavy smokers. Our objective was to investigate how CYP2A6 activity influences tobacco consumption and procarcinogen levels in light...
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ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1977
ISSN: 0002-1369,1881-1280
DOI: 10.1271/bbb1961.41.983