How do female mosquitoes target humans? A Nature research paper reveals the olfactory glomerulus that supports discrimination between humans and animals by Aegis Aegypti, a disease vector
, Design schematic. Filtered air is split into 5 streams, each regulated by a mass flow controller . The humidified carrier stream flows continuously through the mixing manifold to the mosquito. Normally, the two control streams are also flowing through 3-way valves to the manifold. Synthetic odorants and COstream , respectively. The odour stream has 20 odour channels plus a bypass .
To puff the odorant in a given vial, the bypass closes, 2-way valves flanking the odour vial open, and the headspace of the odour vial is carried by the odour stream to a 3-way valve that diverts the stream from exhaust to the mixing manifold with a delay. Meanwhile, control stream 1 is diverted to exhaust to maintain a constant flow rate. When delivering COstream is similarly diverted to the mixing manifold and offset by control stream 2.
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