Rampant historical mitochondrial genome introgression between two species of green pond frogs, Pelophylax nigromaculatus and P. plancyi

Abstract Background Mitochondrial introgression may result in the mitochondrial genome of one species being replaced by that of another species without leaving any trace of past hybridization in its nuclear genome.Such introgression can confuse the species genealogy estimates and lead to absurd inferences of species history.We used a phylogenetic a

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Improvement on Direct Modulation Responses and Stability by Partially Corrugated Gratings Based DFB Lasers With Passive Feedback

DFB lasers with ultrashort cavities or integrated DFB lasers with passive waveguide reflectors are frequently proposed to realize directly modulated Heaters Standard lasers (DMLs) for carrying ultrahigh data rate signals.The former suffers from poor heatsink and laser cleavage yield, while the single-mode stability of the latter scheme is seldom ad

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