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Xiao-Ming Liu,Bang-Xian Zhang,Shi-Guang Li,Xiang-Jun Rao,Dong-MingWang,Xiao-Xuan Hu,Su Liu 한국응용곤충학회 2016 Journal of Asia-Pacific Entomology Vol.19 No.2
The yellow mealworm beetle, Tenebrio molitor (Coleoptera: Tenebrionidae), is a common insect pest that damages stored grain. The insect olfactory co-receptor (Orco) is a transmembrane protein localized on the surface of the dendrites of olfactory sensory neurons and plays an essential role in the olfactory perception. In this study, an Orco ortholog (named as Tmol\Orco) inT.molitorwas characterized. The deduced amino acid sequence of Tmol\Orco shared significant high identities with Orcos in other insect species from distinct Orders. Reverse transcription quantitative PCR (RT-qPCR) analysis showed that Tmol\Orco was predominantly expressed in the antennae of both male and female adults, and the difference between male antennae and female antennae was not significant. Double-stranded RNA (dsRNA) directly against the Tmol\Orco mRNA was synthesized and injected into the T. molitor male adults, RT-qPCR results demonstrated that the transcription level of Tmol\Orco was significantly reduced at 6 d after the injection. The mate-seeking behavior of Tmol\Orco-silenced beetles was significantly inhibited. Compare to the control individuals, the percentage of Tmol\Orco-silenced beetles successfully find mateswas significantly decreased and the average time they spent for searching were significantly increased. These results provided first direct evidence that suppression of Tmol\Orco transcription contributes to the decline in mate recognition of T. molitor
Xiao-Li Wang,Xing Fan,Jian Zeng,Li-Na Sha,Hai-Qin Zhang,Hou-Yang Kang,Rui-Wu Yang,Li Zhang,Chun-Bang Ding,Yong-Hong Zhou 한국유전학회 2012 Genes & Genomics Vol.34 No.3
To estimate the phylogeny and molecular evolution of a single-copy nuclear disrupted meiotic cDNA (DMC1) gene within the StH genome species, two DMC1 homoeologous sequences were isolated from nearly all the sampled StH genome species and were analyzed with those from seven diploid taxa representing the St and H genomes in Triticeae. Sequence diversity patterns and genealogical analysis suggested that (1) there is a close relationship among North American StH genome species;(2) the DMC1 gene sequences of the StH genome species from North America and Eurasia are evolutionarily distinct;(3) the StH genome polyploids have higher levels of sequence diversity in the St genome homoeolog than the H genome homoeolog;(4) the DMC1 sequence may evolve faster in the polyploid species than in the diploids; (5) high dN and dN/dS values in the St genome within polyploid species could be caused by low selective constraints or AT-biased mutation pressure. Our result provides some insight on evolutionary dynamics of duplicate DMC1 gene, the polyploidization events and phylogeny of the StH genome species.
Dao-bang Lu,Yu-ling Song,Xiao-yu Huang 한국물리학회 2019 Current Applied Physics Vol.19 No.1
Under the influence of the external transverse electric fields, the effective mass and optical properties of armchair- edge silicene nanoribbons (ASiNRs) are investigated using the first-principles based on density functional theory (DFT). The results show that, comparing without the external transverse electric fields, the band gaps decrease monotonously, and the effective masses of the electrons and holes change non-monotonously with the absolute value of the electric fields, respectively. The total density of states (DOS) shows that, under the external electric fields, 9-ASiNR exhibits p-type semiconductor characters. Because of the obvious difference of the imaginary parts between the//x and//y directions, 9-ASiNR shows an optical anisotropy. In//x direction, the peaks of the dielectric function have evident red shift which are all associated with the electrons transition between Si 3p orbit and Si 3p, 3s orbits.
Cao, Yuebin,Xiao, Yanjun,Jung, Jin-Young,Um, Han-Don,Jee, Sang-Won,Choi, Hye Mi,Bang, Jin Ho,Lee, Jung-Ho American Chemical Society 2013 ACS APPLIED MATERIALS & INTERFACES Vol.5 No.3
<P>Traditional Pt counter electrode in quantum-dot-sensitized solar cells suffers from a low electrocatalytic activity and instability due to irreversible surface adsorption of sulfur species incurred while regenerating polysulfide (S<SUB><I>n</I></SUB><SUP>2–</SUP>/S<SUP>2–</SUP>) electrolytes. To overcome such constraints, chemically synthesized Cu<SUB>2</SUB>ZnSn(S<SUB>1–<I>x</I></SUB>Se<SUB><I>x</I></SUB>)<SUB>4</SUB> nanocrystals were evaluated as an alternative to Pt. The resulting chalcogenides exhibited remarkable electrocatalytic activities for reduction of polysulfide (S<SUB><I>n</I></SUB><SUP>2-</SUP>) to sulfide (S<SUP>2–</SUP>), which were dictated by the ratios of S/Se. In this study, a quantum dot sensitized solar cell constructed with Cu<SUB>2</SUB>ZnSn(S<SUB>0.5</SUB>Se<SUB>0.5</SUB>)<SUB>4</SUB> as a counter electrode showed the highest energy conversion efficiency of 3.01%, which was even higher than that using Pt (1.24%). The compositional variations in between Cu<SUB>2</SUB>ZnSnS<SUB>4</SUB> (<I>x</I> = 0) and Cu<SUB>2</SUB>ZnSnSe<SUB>4</SUB> (<I>x</I> = 1) revealed that the solar cell performances were closely related to a difference in electrocatalytic activities for polysulfide reduction governed by the S/Se ratios.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/aamick/2013/aamick.2013.5.issue-3/am302522c/production/images/medium/am-2012-02522c_0007.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/am302522c'>ACS Electronic Supporting Info</A></P>
Li, Xiaopeng,Xiao, Yanjun,Bang, Jin Ho,Lausch, Dominik,Meyer, Sylke,Miclea, Paul‐,Tiberiu,Jung, Jin‐,Young,Schweizer, Stefan L.,Lee, Jung‐,Ho,Wehrspohn, Ralf B. WILEY‐VCH Verlag 2013 ADVANCED MATERIALS Vol.25 No.23
<P><B>Through metal‐assisted chemical etching (MaCE), superior purification of dirty Si is observed</B>, from 99.74 to 99.9884% for metallurgical Si and from 99.999772 to 99.999899% for upgraded metallurgical Si. In addition, large area of silicon nanowires (SiNW) are fabricated. The purification effect induces a ∼35% increase in photocurrent for SiNW based photoelectrochemical cell.</P>
Bacillus ferrooxidans sp. nov., an iron(II)-oxidizing bacterium isolated from paddy soil
Guo-Wei Zhou,Xiao-Ru Yang,Jian-Qiang Su,Bang-Xiao Zheng,Yong-Guan Zhu 한국미생물학회 2018 The journal of microbiology Vol.56 No.7
An endospore-forming bacterium, designated YT-3T, was isolated from a paddy soil in Yingtan, Jiangxi, China. Cells of strain YT-3T were Gram-positive, rod-shaped, facultative anaerobic, catalase, and oxidase positive. The optimum growth temperature and pH were 30°C (ranged from 15 to 50°C) and 6.5–7.0 (ranged from 3 to 11), respectively. Analysis of the 16S rRNA gene sequence showed that strain YT-3T was affiliated to the genus Bacillus and displayed the highest similarity to that of Bacillus drentensis JCM 21707T (98.3%), followed by B. ginsengisoli JCM 17335T (97.8%) and B. fumarioli JCM 21708T (97.0%). The similarity of rpoB gene sequence between strain YT-3T and B. drentensis JCM 21707T, B. ginsengisoli JCM 17335T and B. fumarioli JCM 21708T was 80.4%, 81.5%, and 82.1%, respectively. The genomic DNA G + C content was 44.9 mol%. The predominant respiratory quinone was Menaquinone-7, and meso-diaminopimelic acid was present in the peptidoglycan layer of cell wall. The major fatty acids were C15:0 anteiso (36.2%), C14:0 iso (19.6%), C15:0 iso (17.4%), and C16:0 iso (9.8%). The polar lipid profile consisted of diphosphatidylglycerol, phosphatidylethanolamine, phosphatidylglycerol, phospholipids, and ammoniac phospholipids. The DNA-DNA hybridization values between isolate YT-3T and B. drentensis (JCM 21707T), B. ginsengisoli (JCM 17335T), and B. fumarioli (JCM 21708T) were 36.3%, 30.3%, and 25.3%, respectively. On the basis of physiological, genetic and biochemical data, strain YT-3T represented a novel species of the genus Bacillus, for which the name Bacillus ferrooxidans sp. nov was proposed. The type strain is YT-3T (= KCTC 33875T = CCTCC AB 2017049T).