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A tumor induced by 7.12-dimethylbenz (a) anthracene in the hen is described from which a virus was isolated and classified as C type of Rous sarcoma virus. The virus is described in brief. It does not belong to any known strain of Rous sarcoma virus.
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A study of intraleukocyte cytotoxic system and phagocytic function of granulocytes was carried out in rats with 7,12-dimethylbenz(a)anthracene-induced sarcoma. There were no distinctive alterations of microbicidal factors of polymorphonuclear neutrophils (PMN) at the initial stage of the tumour
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The level of intraleukocytic cationic proteins is studied in rats with the transplanted Pliss lymphosarcoma and sarcoma induced by 7,12-dimethylbenz(a)anthracene (DMBA). The amount of cationic proteins was found to decrease in granulocytes both of mongrel and Wistar rats with transplantable tumours.
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Tumor induction in rats by 7,12-dimethylbenz[a]anthracene (DMBA) will generate malignancies that display reproducible chromosomal abnormalities involving rat chromosome (RNO) 2. Thus, it has been reported that rat DMBA erythroleukemias display RNO2 abnormalities, which in this case were closely
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Animal experiments have shown that carcinogenicity of chemicals is higher in fetal or neonatal periods than adult. We investigated sensitivities to a carcinogen in peri-neonatal rats with a model of sarcomas-induction by a subcutaneous injection of chemo-carcinogen that has rarely done in neonatal
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Putrescine in determinable amounts is contained in the tumour tissue, in the liver tissue of normal animals it was not detected by the applied method. The spermidine content in the tumour is also considerably higher, it is 15.-3 times as high as that in the normal liver both per 1 g of fresh tissue
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A series of alkylating and aralkylating bromides was used in a comparative study of chemical reactivity (using 4-(p-nitrobenzyl) pyridine as standard nucleophile), and carcinogenic activity (using single injections by the subcutaneous route in 6-week old female CB-hooded rats). Benzyl, ethyl,
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In this study a new modification of the systemic 2-stage carcinogenesis experiment is described. Tumors were induced in NMRI-mice using a single intravaginal application of the carcinogen 7,12-dimethylbenz[a]anthracene (DMBA) (initiator) followed by intravaginal treatment with
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Effects of neonatal androgenization on 7,12-dimethylbenz[a]anthracene (DMBA)-induced endometrial carcinogenesis in Sprague-Dawley rats are studied. Testosterone propionate (1.25 mg) was injected subcutaneously into 110 2-day-old rats. At 8 weeks of age, a pellet containing 0.2 or 1mg DMBA was
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The 8,9-dihydrodiols of 7-methylbenz(a)anthracene and 7,12-dimethylbenz(a)anthracene and the 7,8-dihydrodiol of benzo(a)pyrene, which are non-K-region diols with adjacent olefinic double bonds that can be metabolized to diol-epoxides, were more active than the parent hydrocarbons in inducing
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A human revertant cell line, derived from non-producer human osteosarcoma cells (NP/KHOS) induced by Kirsten murine sarcoma virus, was treated in vitro with various levels of polycyclic aromatic hydrocarbons (3-methylcholanthrene, 7,12-dimethylbenz(alpha)anthracene, and benzo(alpha)pyrene [BP] or
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