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Date: | Tue, 21 Jun 1994 09:30:00 -0700 |
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Ah yes, the caramilk mystery..
Peter:
I did a seminar on microencapsulated pesticides a few years ago, and
perhaps I could find the information in the archives, but I'm sure you'd
get a better answer from one of the manufacturers. Microencapsualted
diazinon was (is?) registered in Canada as a Basudin formulation.
As I recall, the capsules were a polymer formed as a reaction when a
chemical mixed with the pestcide, came in contact with a second
chemical as the pesticide was injected into a receiving liquid. By
adjusting the injection stream size and pressure, the polymer
concentration, and the polar properties of the 2 liquids as the
pesticide was injected, droplets of pesticide of the right size, became
encapsulated with a wall thickness that resulted in the desired extended
release.
There were different materials used if the product was water or oil
based, but the principle was similar. I don't know if there is a
technique for small amounts. Wasn't someone microencapsulating a pollen
extract for improving the attractiveness of pollen substitute?
Kerry Clark, Apiculture Specialist
B.C. Ministry of Agriculture
1201 103 Ave
Dawson Creek B.C.
V1G 4J2 CANADA Tel (604) 784-2225 fax (604) 784-2299
INTERNET [log in to unmask]
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