Pyrethrum

Browse

Now showing 1 - 1 of 1

A Note on the Possibility of the Stabilization of Pyrethrum
(January 1948) Raymond, W.D.; Padhye, V.P.; F.R.I.C., Chemical Laboratory, Dar es Salaam
Following work [1] oh the stabilizing effect of sulphur dioxide on papain, our attention sk as drawn to a paper by Mario Covello [2] on the inactivation of the oxidases in pyrethrum flowers with the resultant stabilization of the dried product. Covello's work was carried out on flowers in different stages of development and by different methods of drying. The development stages were:—(1) the dlosed flower heads, the heads just opened, the head completely opened, more matured flowers than No.-3,'(5) the heads completely mature and, partly, dried on the plant.