摘要:

A novel 4-vinylquinoline alkaloid, strictigine, has been isolated from the roots, stems and leaves ofRhazya stricta. The structure of strictigine (1) was established with the help of spectroscopic studies including HOHAHA and inverse NMR experiments (HMQC, HMBC)

ISSN:1057-5634    

DOI:10.1080/10575639608043240

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

Human hemolytic streptococci were monitored for bacteriocinogenic activity against intra- and inter- generic bacteria. 20% of the isolates showed broad range bioactivity, but non of the producers was antagonistic against closely related streptococci. The bioctivity was resistant to lysozyme and lipase but sensitive to trypsin. The streptococcin preparation remained stable at 2–8 pH range, 100°C (for 10 min) and 80°C (for 120 min). Different preparations retained their bioactivity at -20°C for variable time (2 to 30 days). Streptococein titre was 28 arbitrary units (AU); whereas, lacuna percentage was 14.6. Temperature (40°C) mediated plasmid curing revealed the chromosomal location of the bacteriocinogenic determinants. The bacteriocin protein was found to be 16.6 Kd (by SDS-PAGE).

ISSN:1057-5634    

DOI:10.1080/10575639608043241

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

The preparation of 1-(3-indolylethyl)-2-cyanotetrahydropyridines (3a) and (3b), bearing a protected acetaldehyde chain at the indole 2-position, is reported. Acid treatment of (3a) and (3b) leads to products resulting from disproportionation of the initially formed dihydropyridinium cation.

ISSN:1057-5634    

DOI:10.1080/10575639608043242

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor

摘要:

This is a scanned image of the original Editorial Board page(s) for this issue.

ISSN:1057-5634    

DOI:10.1080/10575639608043229

出版商:Taylor & Francis Group    

年代:1996

数据来源: Taylor