نتایج جستجو برای: 11 dimethylhydrazine
تعداد نتایج: 386720 فیلتر نتایج به سال:
The effects of sodium cyanate, ferf-butyl isocyanate, and benzyl isothiocyanate on carcinogen-induced neoplasia were studied in experiments in which the test compound was fed starting 1 week following completion of carcinogen administra tions. Under these conditions, all three test compounds exerted an inhibitory effect on the occurrence of 7,12-dimethylbenz(a)anthracene-induced neoplasia of th...
Solutions of 0.012% hydrazine sulfate, 0.001% 1,2-dirnethylhydrazine dihydrochloride, and 0.5% isonicotinic acid were given continuously in the drinking water of 9-, 7-, and 5-week-old randomly bred Syrian golden hamsters for the remainder of their lifetime. The consumption of hydrazine sulfate and isonicotinic acid was without any significant carcinogenic action, while 1,2-dimethylhydrazine di...
We report organometallic vapor-phase epitaxy ~OMVPE! growth and optical characteristics of 1.17–1.20 mm double-heterostructure laser diodes with three Ga0.7In0.3N0.003As0.997 ~7 nm!/GaAs~10 nm! quantum wells ~GaInNAs/GaAs QWs!. Three GaInNAs/GaAs QWs were successfully grown by OMVPE using dimethylhydrazine as the N precursor. Strong room-temperature photoluminescence at the 1.17–1.19 mm regime ...
1 N-nitrosodimethylamine (NDMA) is an emerging disinfection by-product, and we show 2 that use of chlorine dioxide (ClO2) has the potential to increase NDMA formation in waters 3 containing precursors with hydrazine moieties. NDMA formation was measured after 4 oxidation of 13 amines by monochloramine, ClO2 and pre-treatment with ClO2 followed by 5 post-monochloramination. Daminozide, a plant g...
We previously showed that DNA fragmentation factor, which comprises a caspase-3-activated DNase (CAD) and its inhibitor (ICAD), may influence the rate of cell death by generating PARP-1-activating DNA breaks. Here we tested the hypothesis that ICAD-deficient colon epithelial cells exhibiting resistance to death stimuli may accumulate additional genetic modifications, leading to a tumorigenic ph...
alpha-Difluoromethylornithine (DFMO) treatment has been shown to modify carcinogenesis in many experimental tumor models, including breast, urinary bladder, and colon. This study was designed to determine whether DFMO treatment can inhibit tumor growth on chemical-induced colon cancer in rats. Effectiveness of DFMO in combination with mitomycin C (MMC) was also evaluated. Forty-two Sprague-Dawl...
Genetic analysis of colon tumor induction by symmetrical 1,2-dimethylhydrazine (DMH) was undertaken in F1, F2, and reciprocal backcross hybrids derived from a cross between two inbred mouse strains, the 100% susceptible ICR/Ha and completely resistant C57BL/Ha. Mice, 12 to 14 weeks old, received 22 successive weekly s.c. injections of 0.35% aqueous solution of DMH buffered to pH 6.5. A dose of ...
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