We report a combined experimental and theoretical study of the low-lying electronic states of cyclopentadienone (C5H4O). The cyclopentadienone anion (C5H4O(-)) was generated in the gas phase via reaction of atomic oxygen radical anions (O(-)) with cyclopentanone (C5H8O). Photoelectron imaging was used to gain access to the first three electronic states of C5H4O, including the X (1)A1 ground sta...

is a bis-Mannich base. Mannich bases have various biological activities such as antimicrobial, cytotoxic, anticancer, analgesic, and anticonvulsant activities. It has been reported that Mannich bases such as 1-diphenylaminomethyl-3-(1-naphthylimino)-1,3-dihydroindol-3-one, 1diphenylaminomethyl-3-(4-methylphenylimino)-1,3-dihydroindol-3-one and 1,3-dicyclohexyl-5-alkyl-5-aminomethylbarbituric ac...

The hepatocarcinogen 2-nitropropane causes oxidative damage to liver DNA and RNA after administration to rats; increases in 8-hydroxydeoxyguanosine and formation of an unknown moiety (DM ) in DNA, plus increases in 8-hydroxyguanosine and the appearance of two unidentified peaks (KM and R\2) in RNA were observed by high-performance liquid chromatography of nucleosides from 2-nitropropane-treated...

The hepatocarcinogen 2-nitropropane causes oxidative damage to liver DNA and RNA after administration to rats; increases in 8-hydroxydeoxyguanosine and formation of an unknown moiety (DX1) in DNA, plus increases in 8-hydroxyguanosine and the appearance of two unidentified peaks (RX1 and RX2) in RNA were observed by high-performance liquid chromatography of nucleosides from 2-nitropropane-treate...

Headspace solid-phase microextraction was used to extract low-molecular mass degradation products formed during thermo-oxidation of virgin and inplant recycled polyamide 6.6 at 100°C for up to 1200 hours. A total of 20 degradation products were identified using GC-MS. The identified degradation products shared some common structural features and were categorised into four different groups: cycl...