Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Jürgen Mendel"'
Publikováno v:
Journal of Molecular Liquids. 29:127-134
The thermodynamical properties (equilibrium constants K, association enthalpies -ΔH, and association entropies -ΔS) and selected spectroscopic parameters (ΔνOH/νOH and ΔνOD/νOD of the associate band) of hydrogen bonded systems, formed by tert
Publikováno v:
Advances in Molecular Relaxation and Interaction Processes. 11:9-19
The association between tertiary amines and some alcohols has been investigated by means of IR spectroscopy in the temperature range + 50°C to −26°C. Toluene was used as a solvent. The wave number difference of free and associated OH bands Δν O
Publikováno v:
Mutation Research/Genetic Toxicology. 79:239-248
The nitrosoureas 1-methyl-1-nitroso-3-phenylurea, 1-ethyl-1-nitroso-3phenylurea, 1-methyl-1-nitroso-3-(p-fluorophenyl)urea, 1-methyl-1-nitroso-3(p-chlorophenyl)urea, as well as 1-methyl-1-nitroso-3-(p-bromophenyl)urea, as well as their non-nitrosated
Publikováno v:
Cancer Letters. 4:299-303
Summary In vitro, 1-methyl-1-nitroso-3-phenylurea (MNPU) was easily formed from 1-methyl-3-phenylurea (MPU) and sodium nitrite in an acid environment. In rats MNPU showed a strong carcinogenic effect, inducing tumors of the forestomach. MNPU was form
Publikováno v:
Carcinogenesis. 8:237-240
1,3-Dimethyl-3-phenyl-1-nitrosourea (DMPNU) is a very potent local carcinogen in rats and induces a 100% frequency of forestomach carcinomas when applied i.g. in two different dosages (10 applications of 0.3 or 0.03 mmol/kg body wt, respectively, at
Autor:
Jürgen Mendel, Alfred Kolbe
Publikováno v:
Phosphorous and Sulfur and the Related Elements. 3:21-26
The hydrogen bond between several alcohols, in particular benzyl alcohol and isopropanol, as donors, and a number of tertiary phosphines, as well as a smaller number of tertiary arsines, as acceptors was investigated by means of ir spectroscopy in th
Publikováno v:
Mutation Research Letters. 103:91-97
Patulin is a potent inducer of chromatid-type aberrations in Chinese hamster V79-E cells, but loses its activity when 9000 g supernatant of rat-liver homogenate is added. The narrow dose range of patulin clastogenicity shows a quantitative relationsh
Publikováno v:
Carcinogenesis. 6:873-876
The genotoxicity of 1-methyl-3-phenyl-1-nitrosourea (MPNU), 1-methyl-3-(p-chlorophenyl)-1-nitrosourea (C1-MPNU), 1-ethyl-3-phenyl-1-nitrosourea (EPNU), 1,3-dimethyl-3-phenyl-1-nitrosourea (DMPNU) and their derivatives substituted by deuterium in diff
Autor:
Alfred Kolbe, Jürgen Mendel
Publikováno v:
Phosphorus and Sulfur and the Related Elements. 15:327-329
The infrared spectral properties of deuterium bonds have been investigated in systems formed by tertiary aliphatic phosphines and benzyl alcohol-OD and/or isopropanol-OD in toluene as a solvent. The results are to be compared with those obtained in a
Publikováno v:
Carcinogenesis. 4(4)
1,3-Dimethyl-3-phenyl-1-nitrosourea (DMPNU) shows no spontaneous decomposition in aqueous buffered solution (pH 7.0) at 37 degrees C over a measuring period of 10 days, but it is directly genotoxic in all assays applied. This compound induces base su