Results 151 to 160 of about 1,271 (193)
Some of the next articles are maybe not open access.
Plasma Norharman (β‐Carboline) Levels are Elevated in Chronic Alcoholics
Alcoholism: Clinical and Experimental Research, 1991Based on the hypothesis that condensation products of neurotransmitters with aldehydes are involved in the pathogenesis of alcoholism, aromatic β‐carbolines (norharman and harman) were measured in the blood plasma of alcoholics and nonalcoholics. The identity of the extracted compounds was confirmed by various elution conditions of the high performance
H, Rommelspacher, L G, Schmidt, T, May
openaire +2 more sources
Mutagenicities of mono-nitrobenzene derivatives in the presence of norharman
Mutation Research Letters, 1983The mutagenicities of 22 mono-nitrobenzene derivatives, i.e., nitrobenzene [98-95-3] and the ortho, meta and para isomers of nitrotoluene [88-72-2, 99-08-1, 99-99-0], nitrophenol [88-75-5, 554-84-7, 100-02-7], nitroanisole [91-23-6, 555-03-3, 100-17-4], nitrochlorobenzene [88-73-3, 121-73-3, 100-00-5], nitrobenzoic acid [552-16-9, 121-92-6, 62-23-7 ...
J, Suzuki, T, Koyama, S, Suzuki
openaire +2 more sources
Cyclodextrins modify the proton transfer photoreactions of norharmane
Journal of Photochemistry and Photobiology A: Chemistry, 2005Abstract Excited state proton transfer reactions of norharmane have been investigated in the presence of cyclodextrins (CDs): β-CD and modified β-CDs at pH values of 4.0, 7.8, 10.0 and 13.0. The spectral shape and the species present in the equilibria depend on the CDs and the pH of the media.
José L. Prados +4 more
openaire +1 more source
Photophysics of norharmane in micellar environments: a fluorometric study
Biophysical Chemistry, 2004Steady state photophysics of norharmane (NHM) has been studied in different aqueous micellar environments. In aqueous solution at pH 7, excitation of the neutral species promotes a rapid transfer of proton giving rise to the corresponding cationic emission. Aqueous micelles differing in their surface charge characteristics interact with the fluorophore
Arabinda, Mallick, Nitin, Chattopadhyay
openaire +2 more sources
Norharman inhibition of [3H]-diazepam binding in mouse brain
Life Sciences, 1981Abstract Norharman competitively inhibits specific binding of [ 3 H]-diazepam in mouse brain homogenates. In vivo this β-carboline produces a striking rigid catatonic-like appearance which is abolished by diazepam. It also causes a rapid tremor but has little anticonvulsant effect.
A M, Morin, I A, Tanaka, C G, Wasterlain
openaire +2 more sources
Effect of norharman on the mutagenicity of toluidine metabolites
Toxicology Letters, 1989Among the different metabolites of o-toluidine only the nitroso and hydroxylamino derivatives were found to be very potent frameshift mutagens in the presence of the co-mutagen norharman and S9. In the absence of norharman and S9 they are only base pair mutagens.
R L, Gupta +4 more
openaire +2 more sources
Co-mutagenic effect of norharman with N-nitrosamine derivatives
Mutation Research/Fundamental and Molecular Mechanisms of Mutagenesis, 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
openaire +2 more sources
β-carbolines norharman and harman in vegetable oils in China
Food Additives & Contaminants: Part B, 2020The beta-carbolines norharman and harman, two heterocyclic aromatic amines with potential mutagenicity, have been determined in vegetable oils. Identification and analysis were carried out by ultra-performance liquid chromatography-triple quadrupole tandem mass spectrometry (UPLC-MS/MS).
Chen-Xia Zhang +4 more
openaire +2 more sources
Effects of the co-mutagen norharman in rats
Toxicology Letters, 1979Abstract Studies were made on the acute and subacute toxic effects of the co-mutagen norharman when given orally to male Fischer strain rats. Animals were given diets containing 1500 ppm of norharman for 28 days, and 3 or 6 animals were killed for examination on days 0, 1, 3, 7, 14, 21, and 28.
Gen'i Murasaki +5 more
openaire +1 more source
Proflavin and norharman induce luciferase synthesis under anaerobiosis
Archives of Microbiology, 1983Some strains of luminous bacteria produce much less luciferase when they are grown under anaerobic conditions.
Ben-Zion Levi, Shimon Ulitzur
openaire +1 more source