Neoprocurcumenol
Neoprocurcumenol exerts significant toxicity on mosquito larvae.
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Providing storage is as stated on the product vial and the vial is kept tightly sealed, the product can be stored for up to
24 months(2-8C).
Wherever possible, you should prepare and use solutions on the same day. However, if you need to make up stock solutions in advance, we recommend that you store the solution as aliquots in tightly sealed vials at -20C. Generally, these will be useable for up to two weeks. Before use, and prior to opening the vial we recommend that you allow your product to equilibrate to room temperature for at least 1 hour.
Need more advice on solubility, usage and handling? Please email to: service@chemfaces.com
The packaging of the product may have turned upside down during transportation, resulting in the natural compounds adhering to the neck or cap of the vial. take the vial out of its packaging and gently shake to let the compounds fall to the bottom of the vial. for liquid products, centrifuge at 200-500 RPM to gather the liquid at the bottom of the vial. try to avoid loss or contamination during handling.
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Acta Trop. 2010 Jan;113(1):7-11.
Efficacy of bioactive compounds from Curcuma aromatica against mosquito larvae.[Pubmed:
19712662]
With the development of resistance to conventionally used synthetic insecticides, vector management has become acutely problematic. Hence more attention has been focused on botanicals.
Therefore our present study was aimed to evaluate the efficacy of extracts from rhizomes of Curcuma aromatica against the larvae of filariasis vector mosquitoes, Culex quinquefasciatus employing standard WHO procedure at Mysore.
METHODS AND RESULTS:
The soxhlet extraction was carried out using non-polar organic solvent, petroleum ether. The efficacy of petroleum ether extract seemed to be effective with LC(50) and LC(90) values of 11.42 and 18.00 ppm respectively. Bioassay-guided fractionation through flash chromatography lead to the isolation of two larvicidal compounds namely 9-oxoNeoprocurcumenol and Neoprocurcumenol. Between the two, 9-oxoNeoprocurcumenol exerted significant toxicity (P<0.01) on mosquito larvae with LC(50) value of 5.81 ppm and LC(90) being 9.99 ppm compared to Neoprocurcumenol with 13.69 and 23.92 ppm of LC(50) and LC(90) values respectively.
CONCLUSIONS:
From the results, C. aromatica could be considered as one of the powerful candidate to bring about useful botanicals so as to prevent the resurgence of mosquito vectors.
