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Shi Q.,Anhui Normal University | Shi Q.,Sanming College | Huang D.,Anhui Normal University | Wang Y.,Anhui Normal University | Hao J.,Anhui Normal University
Mitochondrial DNA | Year: 2015

The complete mitochondrial genome (mitogenome) of Junonia orithya Linnaeus (Lepidoptera: Nymphalidae: Nymphalinae) is determined to be 15,214bp in length, including 37 typical mitochondrial genes and an AT-rich region. Its gene order and orientation are identical to those of other butterfly species. All PCGs are initiated by typical ATN codons, except for cox1 gene which is started by CGA codon. Nine genes use complete termination codon (TAA), whereas the cox1. cox2. nad1 and nad4 genes end with single T. Except for trnS1(AGN), all tRNA genes display typical secondary cloverleaf structures as those of other insects. The 331bp long AT-rich region contains several features common to the other lepidopterans, such as the ATAGA motif followed by a 18bp poly-T stretch, two microsatellite-like (TA)9 elements, a 5bp poly-A stretch immediately upstream of trnM gene. © 2013 Informa UK Ltd.


Wang Y.H.,Tsinghua University | Zhao K.H.,Tsinghua University | Xie G.L.,Tsinghua University | Huang S.Y.,Sanming College | Zhang L.W.,Tsinghua University
Applied Physics Letters | Year: 2013

The electric properties of as-prepared and annealed Au/SrTiO3:Nb heterojunctions are comparatively investigated. The former junction has hysteretic current-voltage and apparent capacitance-voltage characteristics, showing significant resistance switching effects. The latter behaves like a conventional semiconductor Schottky contact with negligible resistance switching phenomena. Based on the equivalent circuit analysis, we demonstrated that the hysteresis of the measured apparent capacitance-voltage relation of the as-prepared junction is caused by the leakage resistance. Its real junction capacitance is not hysteretic and independent on the resistance states, following the ideal Schottky model. Our results suggest that during the resistance switching, the Schottky barrier profile is kept unchanged, and the conductive filaments play a vital role. © 2013 AIP Publishing LLC.


Shi Q.-H.,Anhui Normal University | Shi Q.-H.,Sanming College | Zhao F.,Anhui Normal University | Hao J.-S.,Anhui Normal University | And 2 more authors.
Mitochondrial DNA | Year: 2013

The complete mitochondrial genome (mitogenome) of Melanitis leda (Lepidoptera: Nymphalidae: Satyrinae) is a circular molecule of 15,122 bp in length, containing 37 typical animal mitochondrial genes and 1 control region, known in insects as the AT-rich region. Its gene content and order are identical to all other available butterfly mitogenomes. All protein-coding genes (PCGs) start with a typical ATN initiation codon, except for COI, which is initiated by the CGA codon as observed in other butterfly species. A total of 97 bp of intergenic spacers are interspersed in 11 regions, ranging in size from 1 to 45 bp. The 314-bp-long AT-rich region is the smallest of all the butterfly corresponding regions available and contains some conserved structures similar to those found in other butterfly mitogenomes, including the motif ATAGA followed by a 19-bp poly-T stretch and a microsatellite-like (AT)6 element preceded by the ATTTA motif. © 2013 Informa UK, Ltd.


Yu H.,Sanming College | Yang Y.,Hunan University
Proceedings of the 2012 International Conference on Industrial Control and Electronics Engineering, ICICEE 2012 | Year: 2012

ABS latency analysis is difficult issue in design phase. In this article the causes of each system delay is analysed and end to end flow delay algorithm in the worst case is used, Architecture Analysis and Design Language(AADL) is studied to model the system. End to end flow latency has been computed and compared with the expected value by AADL tool OSATE. The result shows that the analysis method can be used to resolve the flow latency bottleneck and it provides a new approach to system design and optimization. © 2012 IEEE.


Zheng D.-M.,Sanming College | Wang Z.-C.,Sanming College
Communications in Theoretical Physics | Year: 2012

Based on the framework of the effective-mass approximation, the ionized acceptor bound exciton (A -, X) binding energy and the emission wavelength are investigated for a cylindrical wurtzite (WZ) GaN/Al xGa 1-xN quantum dot (QD) with finite potential barriers by means of a variational method. Numerical results show that the binding energy and the emission wavelength highly depend on the QD size, the position of the ionized acceptor and the Al composition x of the barrier material Al xGa 1-xN. The binding energy and the emission wavelength are larger when the acceptor is located in the vicinity of the left interface of the QD. In particular, the binding energy of (A -, X) complex is insensitive to the dot height when the acceptor is located at the left boundary of the QD. The ionized acceptor bound exciton binding energy and the emission wavelength are both increased if Al composition x is increased. © 2012 Chinese Physical Society and IOP Publishing Ltd.


Zheng D.,Sanming College | Wang Z.,Sanming College | Xiao B.,Sanming College
Journal of Semiconductors | Year: 2012

Within the effective-mass and finite-height potential barrier approximation, a theoretical study of the effects of strain and hydrostatic pressure on the exciton emission wavelength and electron - hole recombination rate in wurtzite cylindrical GaN/Al xGa 1-xN quantum dots (QDs) is performed using a variational approach. Numerical results show that the emission wavelength with strain effect is higher than that without strain effect when the QD height is large (> 3.8 nm), but the status is opposite when the QD height is small (< 3.8 nm). The height of GaN QDs must be less than 5.5 nm for an efficient electron - hole recombination process due to the strain effect. The emission wavelength decreases linearly and the electron - hole recombination rate increases almost linearly with applied hydrostatic pressure. The hydrostatic pressure has a remarkable influence on the emission wavelength for large QDs, and has a significant influence on the electron - hole recombination rate for small QDs. Furthermore, the present numerical outcomes are in qualitative agreement with previous experimental findings under zero pressure. © 2012 Chinese Institute of Electronics.


Shi Q.-H.,Anhui Normal University | Shi Q.-H.,Sanming College | Sun X.-Y.,Chinese Academy of Sciences | Wang Y.-L.,Anhui Normal University | And 3 more authors.
PLoS ONE | Year: 2015

Nymphalidae is the largest family of butterflies with their phylogenetic relationships not adequately approached to date. The mitochondrial genomes (mitogenomes) of 11 new nymphalid species were reported and a comparative mitogenomic analysis was conducted together with other 22 available nymphalid mitogenomes. A phylogenetic analysis of the 33 species from all 13 currently recognized nymphalid subfamilies was done based on the mitogenomic data set with three Lycaenidae species as the outgroups. The mitogenome comparison showed that the eleven new mitogenomes were similar with those of other butterflies in gene content and order. The reconstructed phylogenetic trees reveal that the nymphalids are made up of five major clades (the nymphaline, heliconiine, satyrine, danaine and libytheine clades), with sister relationship between subfamilies Cyrestinae and Biblidinae, and most likely between subfamilies Morphinae and Satyrinae. This whole mitogenome-based phylogeny is generally congruent with those of former studies based on nuclear-gene and mitogenomic analyses, but differs considerably from the result of morphological cladistic analysis, such as the basal position of Libytheinae in morpho-phylogeny is not confirmed in molecular studies. However, we found that the mitogenomic phylogeny established herein is compatible with selected morphological characters (including developmental and adult morphocharacters). © 2015 Shi et al.

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