Tumors have been induced frequently in the laboratory mouse following exposure to the carcinogenic hydrocarbons (6). In many of these studies, the chemicals were applied continuously and at a relatively high concentration. Cramer and Stowell (5) compared the tumorigenic effectiveness of e0-methylcholanthrene when applied continuously or discontinuously to the skin of mice and concluded that ski...

presence of heavy metals in the aquatic systems has become a serious problem. as a result, therehas been a great deal of attention given to new technologies for removal of heavy metal ions from contaminated waters. adsorption is one of the effective methods for removal of toxic heavy metal such as chromium (vi). in the present study, adsorbent is prepared from rice husk, a low cost by product f...

presence of heavy metals in the aquatic systems has become a serious problem. as a result, therehas been a great deal of attention given to new technologies for removal of heavy metal ions from contaminated waters. adsorption is one of the effective methods for removal of toxic heavy metal such as chromium (vi). in the present study, adsorbent is prepared from rice husk, a low cost by product f...

rat plasma and kidney microsomes. At least 9 precipitate arcs were detected with preparations from livers of normal rats. Similar patterns were obtained with preparations from livers of rats which had been injected with 2-aminofluorene or 2-acetylaminofluorene 72 hr earlier. In the latter case, at least 2—3 arcs were shown to fix anti-2azofluorene-'251 antibody, indicating that some microsoma...

A synthetic DNA fragment was constructed to determine the effect of 5' and 3' neighbors of guanine runs on the binding of chemical carcinogens. Determinations were made on the relative intensity of reactivity between aflatoxin B1 or benzo(a)pyrene and methylnitrosourea or 1-(2-chloroethyl)-3-cyclohexyl-1-nitrosourea with various guanine positions in an endlabeled DNA fragment of known sequence....