Impact of laser flicker noise and linewidth on 64 to 96 Gbaud/DP-nQAM metro coherent optical links.

We experimentally investigate the impact of laser flicker noise and linewidth on 64 Gbaud/DP-64QAM, 96 Gbaud/DP-32QAM and 64 or 96 Gbaud/DP-16QAM links. To give a more practical viewpoint, the examined flicker noise closely follows that of an industry forum (OIF 400ZR). We have found that higher modulation order (e.

Acceleration of DNA cleavage by benzidine derivatives under weakly acidic conditions.

Benzidine derivatives, especially 2,7-diaminofluorene and benzidine, accelerated the cleavage of a plasmid DNA (form I) under weakly acidic conditions at 37 degrees C. The acceleration was not inhibited by EDTA, superoxide dismutase, catalase, or hydroxyl radical scavengers. The rate of the cleavage was influenced by the pH value of the reaction buffer.