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Yunsheng W.,Kaili University
Yi chuan = Hereditas | Year: 2016

Population genomics, a new paradigm for population genetics, combine the concepts and techniques of genomics with the theoretical system of population genetics and improve our understanding of microevolution through identification of site-specific effect and genome-wide effects using genome-wide polymorphic sites genotypeing. With the appearance and improvement of the next generation high-throughput sequencing technology, the numbers of plant species with complete genome sequences increased rapidly and large scale resequencing has also been carried out in recent years. Parallel sequencing has also been done in some plant species without complete genome sequences. These studies have greatly promoted the development of population genomics and deepened our understanding of the genetic diversity, level of linking disequilibium, selection effect, demographical history and molecular mechanism of complex traits of relevant plant population at a genomic level. In this review, I briely introduced the concept and research methods of population genomics and summarized the research progress of plant population genomics based on high-throughput sequencing. I also discussed the prospect as well as existing problems of plant population genomics in order to provide references for related studies.

Yin H.-F.,Kaili University | Zhang H.,Sichuan University | Yue L.,Kaili University
Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica | Year: 2014

Near- infrared plasmons in N- doped hexagonal graphene nanostructures were investigated using time- dependent density functional theory. Along a certain direction, N- doped hexagonal grapheme nanostructures with a side length of 1 nm have more intense plasmon resonances throughout the nearinfrared spectral region. The electrons that participate in these near-infrared plasmon resonances oscillate back and forth between the center and edge regions of the hexagonal nanostructures. The formation of a near-infrared plasmon resonance mode depends on the nitrogen-doping position and the scale size of the graphene nanostructure. It is only when the nitrogen-doped location is close to the edge of the nanostructures, near-infrared plasmon resonance mode of the graphene nanostructure will be formed. For N-doped hexagonal graphene nanostructures with a side length of less than 1 nm, there is no plasmon resonance in the nearinfrared spectral region. © Editorial office of Acta Physico-Chimica Sinica.

Yin H.-F.,Sichuan University | Yin H.-F.,Kaili University | Zhang H.,Sichuan University
International Journal of Quantum Chemistry | Year: 2012

The collectivity of the electronic motion in small sodium clusters with ring structure is studied by time-dependent density functional theory. The formation and development of collective resonances in the absorption spectra were obtained as a function of the ring radius. In small ring clusters, besides the lower-energy mode and the higher-energy mode, there is another plasmon resonance mode, that is, the reverse two-dipole mode. For the reverse two-dipole mode, the formations of these two dipoles are due to the external field inducement and the shielding effect, although the resonant excitation is mainly due to the coupling effect of the electrons of these two dipoles. © 2012 Wiley Periodicals, Inc. Copyright © 2011 Wiley Periodicals, Inc.

Yin H.-F.,Sichuan University | Yin H.-F.,Kaili University | Zhang H.,Sichuan University
Physica B: Condensed Matter | Year: 2012

The collectivity of the electronic motion in small sodium clusters with planar structure is studied by the time-dependent density functional theory (TDDFT). The formation and development of collective resonances in the absorption spectra were obtained as the function of the size and shape of the plane. We find the symmetry plays an important role in the collective excitation. Resonance peaks increase with the reduction of the symmetries and, on the contrary, resonance peaks decrease with the increase of the symmetries. In the planar cluster, there are two main excitation modes: the higher-energy mode and the competitive mode, which is due to the coupling and competition of the quasi-lower-energy effect and the quasi-higher-energy effect. With the increase of the interatomic distance, peaks of the absorption spectra are all red-shifted and the evolutionary trend is also discussed. © 2011 Elsevier B.V. All rights reserved.

Yin H.,Sichuan University | Yin H.,Kaili University | Zhang H.,Sichuan University
Journal of Applied Physics | Year: 2012

The collectivity of the electronic motion in graphene nanostructures is studied by time-dependent density functional theory (TDDFT). Compared with the plasmon in the homogeneous graphene, the plasmon in the graphene nanostructure has some different properties due to the effect of the size and the all dimensional confinement. In lower-energy resonance zone, spectral band is greatly broadening, even extending to the near-infrared spectral area, and the photoabsorption strength line splits. The absorption spectrum also depends on the edge configuration of the graphene nanostructure. The armchair-edge and the zigzag-edge play different roles in the absorption spectrum. Moreover, our results also demonstrate that most low-energy resonances are localized in the boundary region. © 2012 American Institute of Physics.

Yin H.,Sichuan University | Yin H.,Kaili University | Zhang H.,Sichuan University
Applied Physics Letters | Year: 2012

In sodium nanoring dimers, plasmon resonances and the plasmon-induced field enhancement are investigated by time-dependent density functional theory. The optical absorption, the induced charge response, and the frequency dependent current demonstrate that the main plasmon resonance modes are the charge transfer plasmon mode and the bonding dimer plasmon mode (BDP). Moreover, there are also two small hybridized plasmon modes. The induced field enhancement of each spatial region depends on the gap distance and the plasmon mode. For the narrow gap, the field enhancement at different positions of the straight line segments between two nanorings is almost uniformly distributed. However, for large separations, along the axial direction, the field enhancement gradually decreases in the region within the radius of the sodium atom. Then, the change of the field enhancement is nonlinear. For different plasmon modes, there is a different number of field enhancement extrema. The largest extreme value is located in the middle region. These findings are expected to play an important role in designing plasmonic nanostructures for practical applications that require coupled metallic nanoparticles with enhanced electric fields. © 2012 American Institute of Physics.

Ye X.,Kaili University
Proceedings of the 2011 International Conference on Business Computing and Global Informatization, BCGIn 2011 | Year: 2011

Recent advances in financial econometrics have led to the development of new estimators of the diffusion coefficient by using frequently-sampled price data. These estimators rely on a variety of different assumptions and take many different functional forms in time and state domains. Motivated by the empirical and theoretical success of combination estimation based on time-domain and state-domain, this paper presents new results by combining individual estimators to form the new estimators of the diffusion coefficient. The proposed estimators eliminate the effects of the market microstructure noise and Monte Carlo analysis demonstrates their finite sample performances. Under certain conditions, some asymptotic properties are derived here. We find that these estimators can generally be outperformed, in terms of accuracy, by any individual estimator and the existing integrated estimators. © 2011 IEEE.

Wang X.,Guizhou University | Wang X.,Kaili University | Yin J.,Guizhou University | Shi L.,Guizhou University | And 2 more authors.
European Journal of Medicinal Chemistry | Year: 2014

Novel imine derivatives of quinazolin-4(3H)-one were designed and synthesized by using aminoethyl moieties to increase the amine bridge of quinazolin-4(3H)-one amine and then introducing various aromatic aldehydes. The target compounds were characterized by proton nuclear magnetic resonance spectroscopy (1H NMR), carbon nuclear magnetic resonance spectroscopy (13C NMR), mass spectrometry (MS), infrared spectroscopy (IR), elemental analysis, and X-ray diffraction crystallography. Bioassay results indicated that some of the compounds showed good to excellent antibacterial activities against tobacco bacterial wilt and tomato bacterial wilt. The 50% effective concentrations (EC50) of the compounds against tobacco and tomato bacterial wilts ranged from 63.73 μg/mL to 201.52 μg/mL and 38.64 μg/mL to 81.39 μg/mL, respectively, which are lower than that the positive control thiodiazole copper (216.70 and 99.80 μg/mL). These results indicated that novel Schiff base derivatives containing the 4(3H)-quinazolinone moiety can effectively control tobacco and tomato bacterial wilts.

Hou Y.-L.,Nankai University | Hou Y.-L.,Kaili University | Xu H.,Nankai University | Cheng R.-R.,Nankai University | Zhao B.,Nankai University
Chemical Communications | Year: 2015

Two novel 3D frameworks were synthesized, and further nanosized to form nanospheres. Studies revealed that 2 is the first MOF-based luminescent sensor for detecting cyclohexane, and this is also the first time that quick regeneration, high sensitivity, high yield, and easy nanocrystallization of MOF-based luminescent sensors have been simultaneously realized. © 2015 The Royal Society of Chemistry.

Shao-You L.,Guangxi University | Shao-You L.,Kaili University | Qun-Li T.,Hunan University | Qing-Ge F.,Guangxi University
Applied Surface Science | Year: 2011

S/Cr doped mesoporous TiO2 (S-TiO2, Cr-TiO 2, S-Cr-TiO2) were successfully synthesized via a simple, effective and environmental benign solid state reaction route. The low angle XRD patterns demonstrated that the resulting samples possess mesostructures. The further characterizations via N2 adsorption-desorption and XPS showed that the typical S/Cr co-doped mesoporous TiO2 (S-Cr-TiO 2(5S-5Cr)) possesses mesopore with the high specific surface area of 118.4 m2/g and narrow pore size distribution, and both S and Cr have been incorporated into the lattice of TiO2 with the amounts of 4.16% sulfur and 7.88% chromium, respectively. And Raman spectroscopy shows that the surface of S-Cr-TiO2 (5S-5Cr) material possesses stretching vibrational peaks at ∼709, ∼793 cm-1 are assignable to the Ti-O-Cr, O-Cr (Ti)-OH bonds, respectively. Interestingly, the UV-vis displayed that the absorption regions of S/Cr doped mesoporous TiO2 cover the visible light region. As for the series of S-Cr-TiO2 samples, the absorption region even extends to near infrared region with strong adsorption. Moreover, compared with the pure titanium dioxide (P25-TiO2), the photodegradation properties of bromocresol green (BCG) on the S/Cr doped mesoporous TiO2 showed excellent photocatalytic properties under visible light irradiation. Within 50 min visible light irradiation, 82.6% of the initial BCG was degraded for the S-Cr-TiO2 (6S-4Cr) photocatalyst. © 2011 Elsevier B.V. All rights reserved.

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