Inhibition of Culex quinquefasciatus (Diptera: Culicidae) viability by nanosecond pulsed electric field radiation

Radiation effects of high-intensity nanosecond pulsed electric fields on the viability of Culex quinquefasciatus (Diptera: Culicidae) were determined. Statistical analyses from results show that the treatment energy density of up to 17.76 J m^?3 produced the optimum result in which the number of survived mosquitoes was decreased by 20% (P < 0.05). Furthermore, the average developmental rate into adult forms of treated fourth-instart lavae was found lower compared to that of the control (P < 0.05). The present study indicates that electrical pulse characteristics, especially the pulse amplitude, might be responsible for the decrease in mosquito viability.     

Two lignans,one alkaloid,and flavanone from the twigs of Feroniella lucida

Four new compounds, two lignans; lucidenal and lucidanin (1 and 2), one alkaloid (3), and one flavanone (4) together with 26 known compounds (5–30), were isolated from the twigs of Feroniella lucida. The structures of the new compounds were determined on the basis of spectroscopic analyses. Lucidenal 1 showed cytotoxicity against HuCCA-1, A549, MOLT-3 and HepG2 cancer cell lines with IC₅₀ values of 4.27, 9.59, 2.31, and 6.50 μg/mL, respectively. A plausible biosynthetic pathway of 1 was proposed.