Results 121 to 130 of about 2,210 (158)

Dimethylnitrosamine in Chinese marine salt fish

Food and Cosmetics Toxicology, 1973
Abstract Samples of marine salt fish from the markets in Hong Kong were analysed for N , N -dimethylnitrosamine (DMNA). Significant amounts of this compound, commonly in the 0·05-0·3 ppm range, were detected by gas chromatography and were confirmed in several samples by gas chromatography-mass spectrometry.
Y Y, Fong, W C, Chan
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Nitrosopyrrolidine and Dimethylnitrosamine in Bacon

Nature, 1973
DIMETHYLNITROSAMINE (DMN) and, in general, many N-nitrosamines are extremely potent carcinogens1,2, and trace amounts of DMN have been demonstrated in certain types of cured meat products and smoked fish3–5. Certain press reports6 in the United States have indicated that significant amounts (up to 0.106 p.p.m.) of nitrosopyrrolidine (NPy) can be formed
N P, Sen, B, Donaldson, J R, Iyengar, T, Panalaks   +3 more
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N-Dimethylnitrosamine in Tobacco Smoke Condensate

Nature, 1972
THE possible presence of N-nitrosamines in cigarette smoke and/or condensate has been of interest for some years. Druckrey and Preussmann1 postulated that N-nitrosamines could be produced in burning tobacco, but the difficulty of measuring these compounds prevented the testing of this postulate.
J W, Rhoades, D E, Johnson
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Alkylation of messenger RNA by dimethylnitrosamine

Chemico-Biological Interactions, 1976
Rats were treated with radioactive dimethylnitrosamine or methyl methanesulphonate and the alkylation of various RNA fractions was determined 4 h later. It was found that after administration of dimethylnitrosamine, hepatic messenger RNA (isolated by binding to oligo(dT)-cellulose) and nuclear RNA were alkylated slightly, but significantly less than ...
A E, Pegg, A, Jackson
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Dimethylnitrosamine Demethylase and the Mutagenicity of Dimethylnitrosamine

1984
Although the Ames Salmonella plate incorporation assay(1) is the most widely used method for screening chemicals for potential carcinogenicity, it is well known that many carcinogens are not detected in this test. Some of these “false negative” compounds, such as highly chlorinated organic carcinogens, are also difficult to detect in other mutagenicity
Michael J. Prival, Valerie D. Mitchell
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Dimethylnitrosamine demethylase activity in Drosophila,melanogaster

Biochemical and Biophysical Research Communications, 1982
A dimethylnitrosamine (DMN) demethylase with levels of activity comparable to that in uninduced rat liver was demonstrated in both larval and adult forms of the Hikone-R strain of Drosophila. A microsomal enzyme, it has many properties of a cytochrome P-450-containing mixed-function oxidase.
L C, Waters, C E, Nix, J L, Epler
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Dimethylnitrosamine in the Human Vaginal Vault

Nature, 1973
THE high frequency of cancer of the uterine cervix in southern Africans1 and the general epidemiological features of the disease2 suggest that chemical carcinogens might be found in infected discharge from the human cervix.
J S, Harington, J R, Nunn, L, Irwig
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Effects of Dimethylnitrosamine

1987
The possibility that chemicals found in the environment can suppress certain immune responses is one of the cornerstones of immunotoxicology. The nitrosamines represent an environmentally important group of compounds that includes dimethylnitrosamine (DMN, N-Nitrosodimethylamine).
A. E. Munson, M. P. Holsapple, S. S. Duke   +2 more
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Das Valenzkraftfeld des Dimethylnitrosamins

Berichte der Bunsengesellschaft für physikalische Chemie, 1974
AbstractDas Valenzkraftfeld des Dimethylnitrosamins wurde mit den Schwingungsfrequenzen der sieben isotopen Moleküle (CH3)2NNO, (CD3)2NNO, (CH3)2NN18O, (CH3)2N15NO, (CH3)215NNO, CD3(CH3)NNO und CH3)NNO bestimmt. Die Normalschwingungen und die Verteilung der potentiellen Energie wurden berechnet.
P. Rademacher, W. Lüttke
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Role of dimethylnitrosamine-demethylase in the metabolic activation of dimethylnitrosamine

Chemico-Biological Interactions, 1979
In vivo administration to rats of the mixed-function oxidase modifiers 3-methylcholanthrene (MC), pregnenolone-16 alpha-carbonitrile (PCN) or beta-naphthoflavnoe (beta-f) inhibits the hepatic microsome-catalyzed in vitro binding of dimethylnitrosamine (DMN) to DNA.
D Y, Lai, S C, Myers, Y T, Woo, E J, Greene, M A, Friedman, M F, Argus, J C, Arcos   +6 more
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