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Effects of experimental warming on soil microbial communities in two contrasting subalpine forest ecosystems,eastern Tibetan Plateau,China

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Journal of Mountain Science 2016年第8期13卷 1442-1452页

作者： SUN Di-di LI Yue-jiao ZHAO Wen-qiang ZHANG Zi-liang LI Dan-dan ZHAO chun-zhang LIU Qing Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization&Ecological Restoration and Biodiversity Conservation Key Laboratory of Sichuan Province Chengdu Institute of BiologyChinese Academy of SciencesChengdu 610041China Ecological Security and Protection Key Laboratory of Sichuan Province Mianyang Normal UniversityMianyang 621000China State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China

Soil microbial communities are primarily regulated by environmental temperature. Our study investigated the effects of global warming on soil microbial community composition as measured via phospholipid fatty acid （PLFA） analysis and soil chemical characteristics in relation to soil depth in a dragon spruce plantation and a spruce-fir-dominated natural forestin the Eastern Tibetan Plateau. Opentop chambers were utilized to increase the soil and air temperature. Soil samples were collected from the o-10 cm, 10-20cm, and 20-30 cm layers after a 4-year warming. Our results showed that the soil microbial community and the contents of TC （Total carbon）, TN （Total nitrogen）. NO3-. and NH4＋ responded differently to warming in the two contrasting forests, especially at the 0-10 cm soil depth. Warming increased soil microbial biomass at the 0-20 cm depth of soil in natural forest but reduced it at the o-lo cm depth ofsoil in the plantation. In contrast, the TC and TN contents were reduced in most soil layers of a natural forest but increased in all of the soil layers of the plantation under warming conditions. This result suggested that the effects of warming on soil microbial community and soil C and N pools would differ according to soil depth and forest types; thus, the two contrasting forests would under go differing changes following the future climate warming in this region.

关键词： Microbial biomass Microbialcommunity Phospholipid fatty acid (PLFA) Eastern

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Rapid identification of Psathyrostachys huashanica Keng chromosomes in wheat background based on ND-FISH and SNP array methods

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Journal of Integrative Agriculture 2023年第10期22卷 2934-2948页

作者： LI Jia-chuang LI jiao-jiao ZHAO Li ZHAO Ji-xin WU Jun CHEN Xin-hong ZHANG Li-yu DONG Pu-hui WANG Li-ming ZHAO De-hui WANG chun-ping PANG Yu-hui College of Agronomy Henan University of Science and TechnologyLuoyang 471023P.R.China The Shennong Laboratory Henan ProvienceZhengzhou 450002P.R.China College of Agronomy Northwest A&F UniversityYangling 712100P.R.China

Psathyrostachys huashanica Keng(2n=2x=14,NsNs)is regarded as a valuable wild relative species for common wheat cultivar improvement because of its abundant beneficial agronomic ***,although the development of many wheat–***-derived lines provides a germplasm base for the transfer of excellent traits,the lag in the identification of *** chromosomes in the wheat background has limited the study of these *** this study,three novel nondenaturing fluorescence in situ hybridization(ND-FISH)-positive oligo probes were *** them,HS-TZ3 and HS-TZ4 could specifically hybridize with *** chromosomes,mainly in the telomere area,and HS-CHTZ5 could hybridize with the chromosomal centromere *** sequentially constructed a *** FISH karyotype and idiogram that helped identify the homologous groups of introduced *** *** detail,1Ns and 2Ns had opposite signals on the short and long arms,3Ns,4Ns,and 7Ns had superposed two-color signals,5Ns and 6Ns had fluorescent signals only on their short arms,and 7Ns had signals on the intercalary of the long *** addition,we evaluated different ways to identify alien introgression lines by using low-density single nucleotide polymorphism(SNP)arrays and recommended the SNP homozygosity rate in each chromosome as a statistical *** 15K SNP array is widely applicable for addition,substitution,and translocation lines,and the 40K SNP array is the most accurate for recognizing transposed intervals between wheat and alien *** research provided convenient methods to distinguish the homologous group of *** chromosomes in a common wheat background based on ND-FISH and SNP arrays,which is of great significance for efficiently identifying wheat–***-derived lines and the further application of Ns chromosomes.

关键词： Psathyrostachys huashanica Ns chromosomes ND-FISH SNP array common wheat

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Shock-Timing Experiment Using a Two-Step Radiation Pulse with a Polystyrene Target

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Chinese Physics Letters 2011年第8期28卷 194-197页

作者： WANG Feng PENG Xiao-Shi jiao chun-Ye LIU Shen-Ye JIANG Xiao-Hua DING Yong-Kun Research Center of Laser Fusion China Academic of Engineering and PhysicsP.O.Box 919-986Mianyang 621900

A shock-timing experiment plays an important role in inertial confinement fusion studies,and the timing of multiple shock waves is crucial to the performance of inertial confinement fusion ignition *** present an experimental observation of a shock wave driven by a two-step radiation pulse in a polystyrene *** experiment is carried out at Shen Guang III Yuan Xing(SGIIIYX)laser facility in China,and the generation and coalescence of the two shock waves,originating from each of the two radiation steps,is clearly seen with two velocity *** two-shock-wave coalescence is also simulated by the radioactive hydrodynamic code of a multi-1D *** experimental measurements are compared with the simulations and quite good agreements are found,with relatively small discrepancies in shock timing.

关键词： shock steps polystyrene

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Improved magnetic anisotropy of Co-based multilayer film with nitrogen dopant

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Rare Metals 2021年第10期40卷 2855-2861页

作者： Ling-Ran Yu Xiu-Lan Xu Yun-Long Jia Xuan Geng Xu-Jie Ma Yi-Fei Ma Yong-Hui Zan chun Feng jiao Teng School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083China School of Civil and Resources Engineering University of Science and Technology BeijingBeijing 100083China School of Mathematics and Physics University of Science and Technology BeijingBeijing 100083China

Modulating the magnetic anisotropy of ferromagnetic thin films is crucial for constructing high-density and energy efficient magnetic memory devices. Ta/W(N)/Co/Pt multilayers were deposited on silicon substrates by magnetron sputtering at room temperature. The influences of N dopant on the magnetic anisotropy of the multilayers were investigated by preparing the sample with N incorporation. The results indicate that when sputtering W target with only argon gas(Ar), Ta/W/Co/Pt sample shows inplane magnetic anisotropy(IMA). When sputtering W target at a different amount of N_(2) and Ar atmosphere, it can induce perpendicular magnetic anisotropy(PMA) for proper N-doped Ta/W(N)/Co/Pt sample. When the gas flow ratio of Ar:N_(2) is 16:6, the effective magnetic anisotropy constant reach its maximum value of 1.68×10^(5) J·m^(-3),which enhanced by about 400% than our past works(annealing treatment is necessary to induce PMA in Pt/Co/MgO system). X-ray diffraction(XRD) and X-ray reflection(XRR) results demonstrate that N dopants can effectively promote the formation of b-W phase and reduce the roughness of W(N)/Co interface, which are beneficial for PMA. X-ray electron spectroscopy(XPS) analysis reveals that N doping redistributes Co charges, nitrogen ions participate in electron allocation of Co and attract some electrons of Co to form orbital hybridization between Co3 d and N 2 p. This may be another important reason for the PMA formation.

关键词： Magnetic multilayers N dopants Perpendicular magnetic anisotropy X-ray electron spectroscopy

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An efficient light-to-heat conversion coupling photothermal effect and exothermic chemical reaction in Au NRs/V_(2)C MXene membranes for high-performance laser ignition

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Defence Technology（防务技术） 2022年第5期18卷 834-842页

作者： Bo Yang Peng-fei Tang chun-jiao Liu Rui Li Xiao-dong Li Jin Chen Zhi-qiang Qiao Hong-ping Zhang Guang-cheng Yang School of Materials Science and Engineering Southwest University of Science and TechnologyMianyangSichuan621010China Institute of Chemical Materials China Academy of Engineering PhysicsMianyangSichuan621900China School of Chemical Engineering Nanjing University of Science and TechnologyNanjing210094PR China

MXene,a new type of two-dimensional materials,have been demonstrated as one of the best photothermal materials owing to their strong light-matter interaction and high photothermal conversion efficiency in recent ***,we report the intriguing light-to-heat conversion property of vanadium carbide(V_(2)C)MXene under irradiation of millisecond laser *** the typical photothermal materials,the V_(2)C MXene not only converts the incident laser energy to heat by the physical photothermal effect,but also triggers the exothermic oxidation of the V_(2)C *** oxidation could be greatly promoted with addition of plasmonic Au nanorods(Au NRs)for light absorption *** to the unique light-to-heat conversion property,the Au NRs/V_(2)C MXene membrane could serve as high temperature pulse(HTP)generators that is proposed for numerous applications with high demand for *** a proof-of concept application,Au NRs/V_(2)C MXene membrane was applied for laser ignition of the high energy density materials,such as 2,4,6,8,10,12-(hexanitrohexaaza)cyclododecane(HNIW or CL-20).An improved ignition performance,in terms of lowered laser threshold,is achieved as compared to the state-of-the-art light-to-heat conversion materials.

关键词： V_(2)C MXene Light-to-heat conversion Exothermic chemical reaction Plasmonic Au nanorods High temperature pulse Laser ignition

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Effect of partial replacement of carbon by nitrogen on intergranular corrosion behavior of high nitrogen martensitic stainless steels

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Journal of Materials Science & Technology 2019年第10期35卷 2357-2364页

作者： Wei-Chao jiao Hua-Bing Li Jing Dai Hao Feng Zhou-Hua Jiang Tao Zhang Da-Ke Xu Hong-chun Zhu Shu-Cai Zhang School of Metallurgy Northeastern UniversityShenyang 110819China Corrosion and Protection Division Shenyang National Laboratory for Materials ScienceNortheastern UniversityShenyang110819China

The microstructure evolution and intergranular corrosion(IGC) behavior of high nitrogen martensitic stainless steels(MSSs) by partial replacing C by N were investigated by using microscopy, X-ray diffraction, nitric acid tests and double-loop electrochemical potentiokinetic reactivation(DL-EPR) tests. The results show that the partial replacement of C by N first reduces and then increases the size and content of precipitates in high nitrogen MSSs, and converts the dominant precipitates from M23C6 to M2N,furthermore first improves and then deteriorates the IGC resistance. The high nitrogen MSS containing medium C and N contents provides good combination of mechanical properties and IGC resistance.

关键词： High nitrogen martensitic stainless steels Precipitation Intergranular corrosion DL-EPR

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Neuroprotective effects of Yiqihuoxue calm wind capsule on ischemic stroke in rats

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Chinese Journal of Natural Medicines 2017年第10期15卷 758-765页

作者： ZHANG Jun-Xia GUO jiao-Mei LIN Hong-Jun ZHANG Ting-Ting LI Zhen-Guo ZHOU Ji-chun ZHANG Zhen-Zhong School of Pharmaceutical Science Zhengzhou University Zhengzhou 450001 China Department of Pharmacology Henan Provincial Institute of Food and Drug Control Zhengzhou 450003 China Key Laboratory of Targeting Therapy and Diagnosis for Critical Diseases of Henan Province Zhengzhou 450001 China

Stroke remains the third leading cause of death and of adult disability *** occlusion,followed by ischemic cascade,leads to irreversible tissue *** tissue plasminogen activator is the only FDA approved drug for the current treatment of acute ischemic ***,traditional Chinese medicine has a long history and rich clinical experience in the treatment and rehabilitation of ischemic *** a classical middle cerebral artery occlusion(MCAO)stroke model,we tested the effectiveness of Yiqihuoxue calm wind(YCW)capsule on neurological function,gross pathology and oxidative stress status in MCAO *** capsule(3.36 and 6.72 g·kg^(-1) of crude drug)could significantly lower Longa's score and superoxide dismutase(SOD)level,together with less necrotic cells and infarcted *** addition to elevated MDA and downregulated i NOS expression,YCW capsule exhibited its neuroprotective effects via free radical scavenging and NO inhibition.

关键词： Yiqihuoxue calm wind capsule Ischemic stroke Middle cerebral artery occlusion Oxidative stress Nitric oxide Platelet

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Facile preparation of antibacterial polymer coatings via thiol-yne click photopolymerization

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Chinese Chemical Letters 2016年第5期27卷 681-684页

作者： Chuan Zhou Yi-He Li Zhen-Hua Jiang Kwang-Duk Ahn Tian-jiao Hu Qing-Hua Wang chun-Hua Wang Department of Chemistry and Biology College of Science National University of Defense Technology Polymer Research Center Korea Institute of Science and Technology

Novel antibacterial polymer coatings were prepared by a facile thiol-yne click photopolymerization of 1-propargyl-3-allYl-l,3-diazanyl-2,4-cyclopentadiene bromide （[PAIMIBr） and tetra（3-mercapto-pro- pionate）pentaerythritol （PETMP）（2：1 molar ratio） using 2,2-dimethoxy-2-phenylacetophenone （DMPA） as initiator. The antibacterial activity of the coatings was tested against Staphylococcus aureus （ATCC 292130） and Escherichia coli （ATCC 25922） by the dynamic shake method. The evaluation results revealed the antibacterial polymer coatings exhibited excellent inhibitory activity against S. aureus and E. coil, especially for S. aureus.

关键词： Antibacterial polymer Thiol-yneClick chemistry UV-curing Coatings

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Birman-Wenzl-Murakami Algebra and Topological Basis

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Communications in Theoretical Physics 2012年第2期57卷 179-182页

作者： ZHOU Cheng-Cheng XUE Kang WANG Gang-Cheng SUN chun-Fang DU Gui-jiao School of Physics Northeast Normal UniversityChangchun 130024China

In this paper, we use entangled states to construct 9 × 9-matrix representations of Temperley-Lieb algebra （TLA ）, then a family of 9 × 9-matrix representations of Birman-Wenzl-Murakami algebra （t3 WMA ） have been presented. Based on which, three topological basis states have been found. And we apply topological basis states to recast ninedimensional BWMA into its three-dimensional counterpart. Finally, we find the topological basis states are spin singlet states in special ease.

关键词： Birman-Wenzl-Murakami algebra topological basis entanglement

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A two-mode squeezed light based on a double-pump phase-matching geometry

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Chinese Physics B 2020年第7期29卷 337-345页

作者： Xuan-Jian He Jun Jia Gao-Feng jiao Li-Qing Chen chun-Hua Yuan Wei-Ping Zhang State Key Laboratory of Precision Spectroscopy Quantum Institute for Light and AtomsDepartment of PhysicsEast China Normal UniversityShanghai 200062China School of Physics and Astronomy and Tsung-Dao Lee InstituteShanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan 030006China

We theoretically investigate the frequency-nondegenerate and frequency degenerate squeezed lights with a four-wave mixing process(4WM)driven by two pump fields crossing at a small *** from a 4WM process driven by a single pump field,the refractive index of the corresponding probe field,np,can be converted to a value that is greater than 1 or less than 1 by an angle *** the new region with np<1,the bandwidth of the gain is relatively large due to the slow change in the refractive index with the two-photon *** this region with an exchange of the roles of the pump and probe beams,the frequency degenerate and spatial nondegenerate twin beams can be generated,which has potential application in quantum information and quantum metrology.

关键词： four-wave mixing phase matching frequency degenerate and spatial nondegenerate metrology

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