Glyphosate-induced Increase in Glutathione S-Transferase Activity and Glutathione Content in Groundnut (Arachis hypogaea L.)

The first operation of cavity lasing of a two-photon absorption (TPA) organic dye, trans-4[p-(N-ethyl-N-hydroxyethylamino) styryl]-N-methylpyridinium iodide (HEASPI), by using picosecond infrared laser as pump source is reported in this paper. Temporal profile of cavity lasing shows obvious oscillations, and magnification of the feedback light can be obtained. By using the difference of re-absorption coefficient at different conditions, we explained the blue shift for cavity lasing and superradiance compared with TPA-induced fluorescence. The lifetime of TPA-induced fluorescence is measured to be 134 ps.