Results 101 to 110 of about 504 (130)
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Photophysical behavior of norharmane related to proximity effect
Journal of Luminescence, 1990Abstract Solvent and temperature effects of fluorescence and its polarization characteristics for norharmane were studied. From the results obtained it is concluded that the fluorescent state changes from the φφ ∗ -type in a polar solvent (EPA) to nφ ∗ -type in a nonpolar solvent (MC), and also that lowest singlet excited states (φφ ∗ -type and nφ ∗
A. Olba, F. Tomas, I. Zabala
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Co-mutagenic effect of norharman with N-nitrosamine derivatives
Mutation Research, 1981The mutagenicities of 14 nitrosamine compounds were tested on Salmonella typhimurium TA98 and TA100 in the presence of the co-mutagen norharman. N-Nitrosophenyl compounds, such as N,N-diphenylnitrosamine, N-methyl-N-phenylnitrosamine, N-ethyl-N-phenylnitrosamine and N-phenyl-N-benzylnitrosamine, were mutagenic when norharman was added to the incubation
K, Wakabayashi +3 more
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Plasma harman and norharman in Parkinson's disease.
Journal of neural transmission. Supplementum, 1996Several lines of evidence suggest that endogenous and exogenous toxins may play a major role in the pathogenesis of Parkinson's disease (PD). In the brain aromatic beta-carbolines, like harman or norharman, may be formed by cyclization of indoleamines. Because of the structural similarity to MPTP, beta-carbolines have been proposed as endogenous toxins.
W, Kuhn +3 more
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SCE induction in human lymphocytes by combined treatment with aniline and norharman
Mutation Research/Genetic Toxicology, 1982In human lymphocytes, aniline was unable to induce an increase of SCEs in vitro with or without metabolic activation by S9 mix. p-Aminophenol, one of the C-hydroxylation metabolites of aniline in the body, however, increased the SCE frequencies of lymphocytes at a concentration of 10-4 M.
S, Takehisa, N, Kanaya
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Neuroactive β-Carbolines Norharman and Harman in Coffee
2015Coffee is among the highest sources of norharman and harman in the human diet. Their presence in coffee has increased the conflictive and inconclusive list of compounds with possible biological activity in this popular beverage. Because regular coffee consumption has been epidemiologically associated with a reduced risk for Parkinson disease and ...
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Norharman - is it an Exclusively Endogenous Modulator of Behavior?
Pharmacopsychiatry, 1999openaire +2 more sources
β-carbolines norharman and harman in vegetable oils in China
Food Additives and Contaminants: Part B Surveillance, 2020Xue-De Wang, Jun Xi, Yuxiang Ma
exaly