17 results on '"Qiping Su"'
Search Results
2. The genome of the rice variety LTH provides insight into its universal susceptibility mechanism to worldwide rice blast fungal strains
- Author
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Lei Yang, Mengfei Zhao, Gan Sha, Qiping Sun, Qiuwen Gong, Qun Yang, Kabin Xie, Meng Yuan, Jenny C. Mortimer, Weibo Xie, Tong Wei, Zhensheng Kang, and Guotian Li
- Subjects
Oryza sativa ,LTH ,Genome assembly ,Nanopore ,Plant immunity ,Resistance gene ,Biotechnology ,TP248.13-248.65 - Abstract
The widely used rice variety Lijiangxintuanheigu (LTH) shows a universal susceptibility to thousands of Magnaporthe oryzae isolates, the causal agent of devastating rice blast, making LTH an ideal line in resistance (R) gene cloning. However, the underlying genetic mechanism of the universal susceptibility has not been fully revealed because of the lack of a high-quality genome. Here, we took a genomic approach together with experimental assays to investigate LTH’s universal susceptibility to rice blast. Using Nanopore long reads, we assembled a chromosome-level genome. Millions of genomic variants were detected by comparing LTH with 10 other rice varieties, of which large-effect variants could affect plant immunity. Gene family analyses show that the number of R genes and leucine-rich repeat receptor-like protein kinase (LRR-RLK)-encoding genes decrease significantly in LTH. Rice blast resistance genes called Pi genes are either absent or disrupted by genomic variations. Additionally, residual R genes of LTH are likely under weak pathogen selection pressure, and other plant defense-related genes are weakly induced by rice blast. In contrast, the pattern-triggered immunity (PTI) of LTH is normal, as demonstrated by experimental assays. Therefore, we conclude that weak effector-trigger immunity (ETI)-mediated primarily by Pi genes but not PTI results in the universal susceptibility of LTH to rice blast. The attenuated ETI of LTH may be also associated with reduced numbers of R genes and LRR-RLKs, and minimally functional residual defense-related genes. Finally, we demonstrate the use of the LTH genome by rapid cloning of the Pi gene Piak from a resistant variety.
- Published
- 2022
- Full Text
- View/download PDF
3. Multiband Superconductivity of Heavy Electrons in aTlNi2Se2Single Crystal
- Author
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Bin Chen, Qiping Su, Xi Zhou, Minghu Fang, Hangdong Wang, Qianhui Mao, Chenxia Li, Rajwali Khan, Jinhu Yang, and Chiheng Dong
- Subjects
Physics ,Superconductivity ,Effective mass (solid-state physics) ,Condensed matter physics ,Condensed Matter::Superconductivity ,Heavy fermion ,General Physics and Astronomy ,Cuprate ,Strongly correlated material ,Isostructural ,Critical field ,Single crystal - Abstract
We have made the first observation of superconductivity in ${\mathrm{TlNi}}_{2}{\mathrm{Se}}_{2}$ at ${T}_{C}=3.7\text{ }\text{ }\mathrm{K}$, and it appears to involve heavy electrons with an effective mass ${m}^{*}=(14--20){m}_{b}$, as inferred from the normal-state electronic specific heat and the upper critical field, ${H}_{C2}(T)$. We found that the zero-field electronic specific-heat data, ${C}_{\mathrm{es}}(T)$ ($0.5\text{ }\text{ }\mathrm{K}\ensuremath{\le}Tl3.7\text{ }\text{ }\mathrm{K}$) in the superconducting state can be fitted with a two-gap BCS model, indicating that ${\mathrm{TlNi}}_{2}{\mathrm{Se}}_{2}$ seems to be a multiband superconductor, which is consistent with the band calculation for the isostructural ${\mathrm{KNi}}_{2}{\mathrm{S}}_{2}$. It is also found that the electronic specific-heat coefficient in the mixed state ${\ensuremath{\gamma}}_{N}(H)$ exhibits a ${H}^{1/2}$ behavior, which is considered as a common feature of the $d$-wave superconductors. ${\mathrm{TlNi}}_{2}{\mathrm{Se}}_{2}$, as a $d$-electron system with heavy electron superconductivity, may be a bridge between cuprate- or iron-based and conventional heavy-fermion superconductors.
- Published
- 2013
4. Multiband superconductivity of heavy electrons in a TlNi2Se2 single crystal
- Author
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Hangdong, Wang, Chiheng, Dong, Qianhui, Mao, Rajwali, Khan, Xi, Zhou, Chenxia, Li, Bin, Chen, Jinhu, Yang, Qiping, Su, and Minghu, Fang
- Abstract
We have made the first observation of superconductivity in TlNi2Se2 at T(C)=3.7 K, and it appears to involve heavy electrons with an effective mass m*=(14-20)m(b), as inferred from the normal-state electronic specific heat and the upper critical field, H(C2)(T). We found that the zero-field electronic specific-heat data, C(es)(T) (0.5 K≤T3.7 K) in the superconducting state can be fitted with a two-gap BCS model, indicating that TlNi2Se2 seems to be a multiband superconductor, which is consistent with the band calculation for the isostructural KNi2S2. It is also found that the electronic specific-heat coefficient in the mixed state γN(H) exhibits a H(1/2) behavior, which is considered as a common feature of the d-wave superconductors. TlNi2Se2, as a d-electron system with heavy electron superconductivity, may be a bridge between cuprate- or iron-based and conventional heavy-fermion superconductors.
- Published
- 2013
5. Superconductivity and disorder effect in TlNi2Se2−xSxcompounds
- Author
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Bin Chen, Hangdong Wang, Qiping Su, Rajwali Khan, Jinhu Yang, Huimin Chen, Minghu Fang, Chiheng Dong, and Qianhui Mao
- Subjects
Superconductivity ,Crystal ,Residual resistivity ,Effective mass (solid-state physics) ,Materials science ,Specific heat ,Electrical resistivity and conductivity ,Analytical chemistry ,Field dependence ,General Materials Science ,Condensed Matter Physics ,Critical field - Abstract
After our first discovery of multi-band superconductivity (SC) in the TlNi2Se2 crystal, we successfully grew a series of TlNi2Se(2-x)S(x) (0.0 ≤ x ≤ 2.0) single crystals. Measurements of resistivity, specific heat, and susceptibility were carried out on these crystals. Superconductivity with T(C) = 2.3 K was first observed in the TlNi2S2 crystal, which also appears to involve heavy electrons with an effective mass m* = 13-25 m(b), as inferred from the normal state electronic specific heat and the upper critical field, H(C2)(T). It was found that bulk SC and heavy-electron behavior is preserved in all the studied TlNi2Se(2-x)S(x) samples. In the mixed state, a novel change of the field dependence of the residual specific heat coefficient, γ(N)(H), occurs in TlNi2Se(2-x)S(x) with increasing S content. We also found that the T(C) value changes with the disorder degree induced by the partial substitution of S for Se, characterized by the residual resistivity ratio (RRR). Thus, the TlNi2Se(2-x)S(x) system provides a platform to study the effect of disorder on the multi-band SC.
- Published
- 2015
6. Bondi-Sachs metrics and Photon Rockets
- Author
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Xiao Zhang, Ding Wang, Qiping Su, Huabin Ge, and Mingxing Luo
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Physics ,High Energy Physics - Theory ,Mathematics - Differential Geometry ,Photon ,Physics and Astronomy (miscellaneous) ,Gravitational wave ,Astrophysics::High Energy Astrophysical Phenomena ,Radiant energy ,FOS: Physical sciences ,Nuclear photonic rocket ,Acceleration (differential geometry) ,Cosmological constant ,Astrophysics::Cosmology and Extragalactic Astrophysics ,General Relativity and Quantum Cosmology (gr-qc) ,General Relativity and Quantum Cosmology ,High Energy Physics - Theory (hep-th) ,Differential Geometry (math.DG) ,De Sitter universe ,Homogeneous space ,FOS: Mathematics ,Mathematical physics - Abstract
We study the Bondi-Sachs rockets with nonzero cosmological constant. We observe that the acceleration of the systems arises naturally in the asymptotic symmetries of (anti-) de Sitter spacetimes. Assuming the validity of the concepts of energy and mass previously introduced in asymptotically flat spacetimes, we find that the emission of pure radiation energy balances the loss of the Bondi mass in certain special families of the Bondi-Sachs rockets, so in these there is no gravitational radiation., Comment: 12 pages, to appear in General Relativity and Gravitation
- Published
- 2011
- Full Text
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7. Figure of Merit and Different Combinations of Observational Data Sets
- Author
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Qiping Su, Zhong-Liang Tuo, and Rong-Gen Cai
- Subjects
Physics ,Nuclear and High Energy Physics ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Cosmic microwave background ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,General Relativity and Quantum Cosmology (gr-qc) ,Cosmology ,General Relativity and Quantum Cosmology ,Baryon ,symbols.namesake ,Observational cosmology ,Dark energy ,symbols ,Figure of merit ,Supernova Legacy Survey ,Statistical physics ,Hubble's law ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
To constrain cosmological parameters, one often makes a joint analysis with different combinations of observational data sets. In this paper we take the figure of merit (FoM) for Dark Energy Task Force fiducial model (CPL model) to estimate goodness of different combinations of data sets, which include 11 widely-used observational data sets (Type Ia Supernovae, Observational Hubble Parameter, Baryon Acoustic Oscillation, Cosmic Microwave Background, X-ray Cluster Baryon Mass Fraction, and Gamma-Ray Bursts). We analyze different combinations and make a comparison for two types of combination based on two types of basic combinations, which are often adopted in the literatures. We find two sets of combinations, which have strong ability to constrain the dark energy parameters, one has the largest FoM, the other contains less observational data with a relative large FoM and a simple fitting procedure., Comment: To be published in Phys.Rev.D, 20 pages, 4 tables
- Published
- 2011
- Full Text
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8. Notes on Ghost Dark Energy
- Author
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Rong-Gen Cai, Zhong-Liang Tuo, Qiping Su, and Hong-Bo Zhang
- Subjects
Physics ,High Energy Physics - Theory ,Nuclear and High Energy Physics ,Particle physics ,Cold dark matter ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,High Energy Physics::Lattice ,Dark matter ,FOS: Physical sciences ,Astrophysics ,Cosmological constant ,General Relativity and Quantum Cosmology (gr-qc) ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Cosmology ,General Relativity and Quantum Cosmology ,symbols.namesake ,High Energy Physics - Phenomenology ,High Energy Physics - Phenomenology (hep-ph) ,Big Bang nucleosynthesis ,High Energy Physics - Theory (hep-th) ,De Sitter universe ,Dark energy ,symbols ,Hubble's law ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We study a phenomenological dark energy model which is rooted in the Veneziano ghost of QCD. In this dark energy model, the energy density of dark energy is proportional to Hubble parameter and the proportional coefficient is of the order $\Lambda^3_{QCD}$, where $\Lambda_{QCD}$ is the mass scale of QCD. The universe has a de Sitter phase at late time and begins to accelerate at redshift around $z_{acc}\sim0.6$. We also fit this model and give the constraints on model parameters, with current observational data including SnIa, BAO, CMB, BBN and Hubble parameter data. We find that the squared sound speed of the dark energy is negative, which may cause an instability. We also study the cosmological evolution of the dark energy with interaction with cold dark matter., Comment: 20 pages,10 figures,Correct some typos and add new references
- Published
- 2010
9. Probing the dynamical behavior of dark energy
- Author
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Hong-Bo Zhang, Qiping Su, and Rong-Gen Cai
- Subjects
Physics ,High Energy Physics - Theory ,Equation of state ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,media_common.quotation_subject ,Cosmic microwave background ,FOS: Physical sciences ,Astronomy and Astrophysics ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,General Relativity and Quantum Cosmology (gr-qc) ,Universe ,Cosmology ,Redshift ,Galaxy ,General Relativity and Quantum Cosmology ,High Energy Physics - Theory (hep-th) ,Dark energy ,media_common ,Free parameter ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We investigate dynamical behavior of the equation of state of dark energy $w_{de}$ by employing the linear-spline method in the region of low redshifts from observational data (SnIa, BAO, CMB and 12 $H(z)$ data). The redshift is binned and $w_{de}$ is approximated by a linear expansion of redshift in each bin. We leave the divided points of redshift bins as free parameters of the model, the best-fitted values of divided points will represent the turning positions of $w_{de}$ where $w_{de}$ changes its evolving direction significantly (if there exist such turnings in our considered region). These turning points are natural divided points of redshift bins, and $w_{de}$ between two nearby divided points can be well approximated by a linear expansion of redshift. We find two turning points of $w_{de}$ in $z\in(0,1.8)$ and one turning point in $z\in (0,0.9)$, and $w_{de}(z)$ could be oscillating around $w=-1$. Moreover, we find that there is a $2\sigma$ deviation of $w_{de}$ from -1 around $z=0.9$ in both correlated and uncorrelated estimates., Comment: Accepted by JCAP; 16 pages, 3 figures
- Published
- 2010
- Full Text
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10. On the Dark Sector Interactions
- Author
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Rong-Gen Cai and Qiping Su
- Subjects
Physics ,High Energy Physics - Theory ,Nuclear and High Energy Physics ,Particle physics ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Dark matter ,Cosmic microwave background ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,General Relativity and Quantum Cosmology (gr-qc) ,Redshift ,Cosmology ,General Relativity and Quantum Cosmology ,symbols.namesake ,High Energy Physics - Theory (hep-th) ,Observational cosmology ,symbols ,Dark energy ,Quintessence ,Hubble's law ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
It is possible that there exist some interactions between dark energy (DE) and dark matter (DM), and a suitable interaction can alleviate the coincidence problem. Several phenomenological interacting forms are proposed and are fitted with observations in the literature. In this paper we investigate the possible interaction in a way independent of specific interacting forms by use of observational data (SNe, BAO, CMB and Hubble parameter). We divide the whole range of redshift into a few bins and set the interacting term $\delta(z)$ to be a constant in each redshift bin. We consider four parameterizations of the equation of state $w_{de}$ for DE and find that $\delta(z)$ is likely to cross the non-interacting ($\delta=0$) and have an oscillation form. It suggests that to study the interaction between DE and DM, more general phenomenological forms of the interacting term should be considered., Comment: 14 pages, 3 figures, 2 tables
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- 2009
- Full Text
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11. Fitting Non-Minimally Coupled Scalar Models to Gold SnIa Dataset
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Qiping Su and Mingxing Luo
- Subjects
Physics ,Nuclear and High Energy Physics ,Theoretical physics ,Scalar (mathematics) ,Astrophysics (astro-ph) ,FOS: Physical sciences ,Astrophysics - Abstract
Non-minimally coupled theories of special potentials are analyzed numerically. Such theories yield equations of state $\omega, Comment: 8 pages, 7 figures, accepted for publication in Phys. Lett. B
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- 2005
- Full Text
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12. Superconductivity in a new layered nickel selenide CsNi2Se2.
- Author
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Huimin Chen, Jinhu Yang, Chao Cao, Lin Li, Qiping Su, Bin Chen, Hangdong Wang, Qianhui Mao, Binjie Xu, Jianhua Du, and Minghu Fang
- Subjects
SELENIDES ,SUPERCONDUCTIVITY ,ELECTRICAL resistivity ,MAGNETIZATION ,CALORIMETRY - Abstract
The physical properties of CsNi
2 Se2 were characterized by electrical resistivity, magnetization and specific heat measurements. We found that the stoichiometric CsNi2 Se2 compound undergoes a superconducting transition at Tc = 2.7 K. A large Sommerfeld coefficient (∼77.90 mJ/mol K−2 ) was obtained from the normal state electronic specific heat. However, the Kadowaki–Woods ratio of CsNi2 Se2 was estimated to be about 0.041 × 10cm(mol K2 /mJ)2 , indicating the absence of strong electron–electron correlations. In the superconducting state, we found that the zero-field electronic specific heat data, Ces (T) (0.5 K T < 2.7 K), can be fitted well with a two-gap BCS model, indicating the multi-gap feature of CsNi2 Se2 . The comparison with the density functional theory (DFT) calculations suggested that the large in these nickel selenide superconductors may be related to the large density of states (DOS) at the Fermi surface. [ABSTRACT FROM AUTHOR]- Published
- 2016
- Full Text
- View/download PDF
13. Superconductivity and disorder effect in TlNi2Se2−x S x compounds.
- Author
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Hangdong Wang, Qianhui Mao, Huimin Chen, Qiping Su, Chiheng Dong, Rajwali Khan, Jinhu Yang, Bin Chen, and Minghu Fang
- Published
- 2015
- Full Text
- View/download PDF
14. On the dark sector interactions
- Author
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Qiping, Su [Key Laboratory of Frontiers in Theoretical Physics, Institute of Theoretical Physics, Chinese Academy of Sciences, P.O. Box 2735, Beijing 100190 (China)]
- Published
- 2010
- Full Text
- View/download PDF
15. Multiband Superconductivity of Heavy Electrons in a TINi2Se2 Single Crystal.
- Author
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Hangdong Wang, Chiheng Dong, Qianhui Mao, Rajwali Khan, Xi Zhou, Chenxia Li, Bin Chen, Jinhu Yang, Qiping Su, and Minghu Fang
- Subjects
- *
SUPERCONDUCTIVITY , *HEAVY fermion superconductors , *SINGLE crystals , *ELECTRONIC systems , *EFFECTIVE mass (Physics) - Abstract
We have made the first observation of superconductivity in TlNi2Se2 at TC=3.7 K, and it appears to involve heavy electrons with an effective mass m∗=(14–20)mb, as inferred from the normal-state electronic specific heat and the upper critical field, HC2(T). We found that the zero-field electronic specific-heat data, Ces(T) (0.5 K≤T<3.7 K) in the superconducting state can be fitted with a two-gap BCS model, indicating that TlNi2Se2 seems to be a multiband superconductor, which is consistent with the band calculation for the isostructural KNi2S2. It is also found that the electronic specific-heat coefficient in the mixed state γN(H) exhibits a H1/2 behavior, which is considered as a common feature of the d-wave superconductors. TlNi2Se2, as a d-electron system with heavy electron superconductivity, may be a bridge between cuprate- or iron-based and conventional heavy-fermion superconductors. [ABSTRACT FROM AUTHOR]
- Published
- 2013
- Full Text
- View/download PDF
16. Notes on ghost dark energy.
- Author
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Rong-Gen Cai, Zhong-Liang Tuo, Hong-Bo Zhang, and Qiping Su
- Subjects
- *
DARK energy , *PHENOMENOLOGICAL theory (Physics) , *MATHEMATICAL models , *QUANTUM chromodynamics , *ENERGY density , *PARAMETER estimation , *NUCLEOSYNTHESIS , *DARK matter - Abstract
We study a phenomenological dark energy model which is rooted in the Veneziano ghost of QCD. In this dark energy model, the energy density of dark energy is proportional to Hubble parameter and the proportional coefficient is of the order A3QCD, where AQCQ is the mass scale of QCD. The universe has a de Sitter phase at late time and begins to accelerate at redshift around zacc ∼ 0.6. We lit this model and give the constraints on model parameters, with current observational data including Type la supernovea, baryon acoustic oscillation, cosmic microwave background, big bang nucleosynthesis, and Hubble parameter data. We also study the cosmological evolution of the dark energy with interaction with cold dark matter. [ABSTRACT FROM AUTHOR]
- Published
- 2011
- Full Text
- View/download PDF
17. Superconductivity in the noncentrosymmetric compound Re6Hf.
- Author
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Bin Chen, Yang Guo, Hangdong Wang, Qiping Su, Qianhui Mao, Jianhua Du, Yuxing Zhou, Jinhu Yang, and Minghu Fang
- Subjects
- *
SUPERCONDUCTIVITY , *RHENIUM compounds , *SUPERCONDUCTING transition temperature - Abstract
Re6Hf, which crystallizes in α-Mn structure(space group I43m) without a spatial inversion center, is a superconductor with a superconducting transition temperature Tc≈6.2K. The measurements of magnetic susceptibility (χ), resistivity (ρ), and specific heat capacity (C) were carried out. Bulk superconductivity is revealed by the jump at Tc of the specific heat with ΔC/γnTc≈1.63, suggesting moderate electron-electron coupling strength in this system. The upper critical field μ0c2HWHH(0) was estimated to be of 89 kOe, and μ0c2HGL(0)=107 kOe, which is close to the Pauli limiting field. The Ginzburg Landau parameter κGL=50.2, indicates that Re6Hf is a type-II superconductor. The temperature dependence of the electronic specific heat Cel(T) in the superconducting state can be explained by BCS theory. Furthermore, the magnetic-field dependence of γ(H) is found to be linear with respect to H. These results imply a dominant s-wave superconductivity in Re6Hf. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
- View/download PDF
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