The chemistry of indoles. IV. Preparation of pyridazino(2,3-a)indoles and as-triazino(1,6-a)indoles.

Pyridazino[2, 3-a]indole derivatives, such as (3a-c), (5a), (6a), (10), (12a-b), (13), (14), (19), (20), and (21) were prepared from 1-aminoindoles. as-Triazino[1, 6-a]indole derivatives, such as (17) and (18) were also prepared

Chasmanine and its structure

The alkaloid chasmanine, C25H41O6N, isolated from A. chasmanthum contains four methoxyl and two hydroxyl groups as well as an imino-ethyl. It undergoes the usual pyrolytic reaction and the unsaturated product, pyrochasmanine, C25H39O5N, gives rise to an acid-catalyzed allylic rearrangement product, isopyrochasmanine. Pyrochasmanine, on treatment with lithium aluminium hydride, is demethoxylated. ...Peer reviewed: YesNRC publication: Ye

Charge identification of highly ionizing particles in desensitized nuclear emulsion using high speed read-out system

We performed an experimental study of charge identification of heavy ions from helium to carbon having energy of about 290 MeV=u using an emulsion chamber. Emulsion was desensitized by means of forced fading (refreshing) to expand a dynamic range of response to highly charged particles. For the track reconstruction and charge identification, the fully automated high speed emulsion read-out system, which was originally developed for identifying minimum ionizing particles, was used without any modification. Clear track by track charge identification up to Z 1?4 6 was demonstrated. The refreshing technique has proved to be a powerful technique to expand response of emulsion film to highly ionizing particles