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The biological toxicity of high levels of breathing gases has been known for centuries, but the mechanism remains elusive. Earlier work mainly focused on the influences of dispersed gas molecules dissolved in water on biomolecules. However, recent studies confirmed the existence of aggregated gas molecules at the water-solid interface. In this paper, we(More)
Solenopsis invicta and Solenopsis richteri are two closely related invasive ants native to South America. Despite their similarity in biology and behavior, S. invicta is a more successful invasive species. Toxic tolerance has been found to be important to the success of some invasive species. Esterases play a crucial role in toxic tolerance of insects.(More)
We have analyzed the SARS data and the effect of the control measure in HongKong, based on a spatial Monte-Carlo model (SEIR) with susceptibles, exposed(latent), infective, and recovered. The SARS data can be well fit by numerical simulations. The control measure is effective to decreasing the transmission by reducing the contact rate. The average value of(More)
Surfactants are commonly used in insecticide formulations as adjuvants to enhance the performance of the insecticidal active ingredients. However, surfactants may have their own intrinsic detrimental effect on insects. In this study, the responses of red imported fire ants, Solenopsis invicta Buren, to 6 polyoxyethylene tridecyl ether surfactants (Ethal(More)
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