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Original Articles

Production of Radioactive Azadirachtin in the Seed Kernels of Azadirachta indica (The Indian Neem Tree)

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Pages 107-110 | Received 17 Sep 1996, Published online: 04 Oct 2006

References

  • 1st,2nd,3rd,4th and 5th International Neem Conferences have been held at Rattach-Egern, WestGermany,16–18June, 1980; Rauisch Holzhausen, WestGermany,25–28May,1983;Nairobi, Kenya,10–15July, 1986; Bangalore, India, 24–28 Feb., 1993; Gatton College, Australia, 4–9 Feb., 1996 respectively
  • 1992 . Neem; A Tree for Solving Global Problems , 60 – 70 . Washington, D. C. : National Academy of Science Press . National Research Council
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  • Schmutterer , H. 1995 . The Neem Tree: Azadirachta indica A. Juss. and other Meliaceae plants. , 518 – 554 . New York NY, , USA : VCH Publishers Inc. .
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  • Schmutterer , H. 1995 . The Neem Tree: Azadirachta indica A. juss. and other Maliaceae Plants. , 89 – 92 . New York NY, , USA : VCH Publishers Inc. .
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  • Homogenisation of the leaves was done in a blender run at a low speed 3 × 20s with the following buffer: 0.5 M sucrose, 0.05 M Tris-Cl, 0.2 mM dithiothreitol, 0.5mM ATP, 0.5 mM, MgCl2. The radio-labelled precursor was added to the supernatant obtained after filtration through 4 layers of cheese cloth. The incubation was done from one day upto three weeks
  • 10 uCi of [2-14C]MVA (53mCi mmol−1) and [2-14C]Acetate (1.85–2.2 GBq mmol−1; 50–60 mCi mmol−1) were fed to the plant twigs/seed kernel extracts. % Incorporation = Total radioactivity (dpm) in pure compound (Azadirachtin) × 100/Total radioactivity (dpm) administered through various methods % Incorporation of [2-14C] acetate was less and hence is not described in detail here
  • Yamasaki , B. R. , Klocke , J. A. , Lee , S. M. , Stone , G. A. and Darlington , M. V. 1986 . J. Chromatography , 356 : 220 – 226 .
  • Govindachari , T. R. , Sandhya , G. and Ganeshraj , S. P. 1992 . Ind. J. Chemistry , 31B : 295 – 296 .
  • Harris , M. , Henderson , R. , McCrindle , R. , Overton , K. H. and Turner , D. W. 1968 . Tetrahedron , 24 : 1517 – 1523 .
  • Radio-active salanin was isolated from the seed kernels which were fed [2-14C] MVA and 0.5 uCi of radioactive salanin was incubated in a cell-free system prepared from fresh seed kernels. Maximum amount of radioactivity (8860 dpm) was obtained in azadirachtin isolated after a week of incubation. That shows about 0.8% incorporation of salanin into azadirachtin

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