On the tech side, a smartphone controlled paper airplane project (~21,000) and the Sense sleep tracker (~19,000) also pulled in a relatively high number of backers vs other projects launched on the platform.
Three days after the first exposure, surviving mosquitoes were once more transferred from the holding buckets to WHO bioassay tubes and exposed either to permethrin papers or to control papers as indicated in Table 1.
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Arthur Ochs Sulzberger Jr., whose family has controlled the paper since 1896, is both the paper's publisher and the company's chairman.
Control papers were treated with 0.9 ml Shellsol.
Equal numbers of mosquitoes were exposed to the corresponding control papers impregnated with resila oil (Organochlorine control), olive oil (Organophosphate/Carbamate control), and silicone oil (Pyrethroid control).
Results are compared with the most relevant optimal control papers discussed above.
The second subset was also subjected to the same bioassay but with control papers impregnated with silicon oil (insecticide carrier) instead of permethrin to control for any physiological stresses induced by the assay.
mosquitoes, 3 5 days of age, were exposed to 1 of 5 insecticides (0.1% bendiocarb, 1.0% fenitrothion, 0.75% permethrin, 0.05% deltamethrin, 4% DDT) or a control papers for 1 hour, according to standard WHO procedures (7 ).
Mosquitoes exposed to insecticide were retained for a further 24 hours prior to storage in RNA later (Sigma) to minimise any induction effect from insecticide exposure and unexposed mosquitoes were exposed to untreated control papers.
