The nicotine-derived N-nitrosamine 4-(methylnitrosamino)-1-(3-pyridyl)-1- butanone (NNK) is abundant in smokeless tobacco and tobacco smoke and is hepatocarcinogenic in F344 rats. We have investigated how vitamin A modulates sister chromatid exchanges and DNA single-strand breaks induced by NNK. In V79 cells, vitamin A at concentrations ranging from 34.9 to 139.6 microM inhibited sister chromat...

In the structure of the title compound (N3MP2MBA), C(15)H(15)NO, the conformation of the N-H bond is anti to the meta-methyl substituent in the aniline ring and that of the C=O bond is syn to the ortho-methyl substituent in the benzoyl ring, while the conformations of the N-H and C=O bonds are anti to each other. The bond parameters in N3MP2MBA are similar to those in 2-methyl-N-phenyl-benzamid...

The title compound, C(13)H(14)N(4), adopts a trans configuration about the azo bond. There is a dihedral angle of 12.18 (7)° between the pyridine and benzene rings and the mean plane of the dimethyl-amino substituent is twisted by 6.1 (2)° relative to the benzene ring. In the crystal, weak inter-molecular C-H⋯N hydrogen bonds result in a zigzag arrangement along [010].

in this work, modification of carbon paste electrode surface with poly (2, 5-dimethyl aniline) (p-2,5-dma) by using electrochemical polymerization was described. then, transition metal ions of ni(ii) were incorporated into the polymer film by two ways. at first way, the polymeric modified electrode was immersed in 0.2 m niso4 solutions and the second way was carried out by electrodeposition of ...

In the title compound, C(13)H(14)N(2), the dihedral angle between the aromatic rings is 69.73 (14)°. In the crystal, inversion dimers linked by pairs of N-H⋯N hydrogen bonds generate R(2) (2)(10) loops. A weak C-H⋯π inter-action also occurs.

In the title compound, C(14)H(16)N(2), the pyrrole and benzene rings form a dihedral angle of 72.37 (8)°. In the crystal, centrosymmetrically related mol-ecules are assembled into dimers by by pairs of N-H⋯N hydrogen bonds, generating rings of R(2) (2)(10) graph-set motif. C-H⋯π inter-actions also occur.

The study below details the synthesis, assembly, and thin film transistors from dihydrodiazapentacenes. These molecules have the same molecular shape as pentacene but are much easier to prepare and have much greater environmental stability. Thin films made from the dihydrodiazapentacene behave as field effect transistors with mobilities and on/off ratios high enough to be useful in certain appl...