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Towards gauge unified,supersymmetric hidden strong dynamics

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Chinese Physics C 2021年第1期45卷 16-31页

作者： cheng-Wei Chiang Sichun Sun Fang ye Department of Physics NTUTaipei Department of Physics and Center for Mathematics and Theoretical Physics NCUTaoyuan Institute of Physics Academia SinicaTaipei Physics Division NCTSHsinchu Institute for Advanced Study The Hong Kong University of Science and TechnologyClear Water BayKowloonHong Kong

We consider a class of models with extra complex scalars that are charged under both the Standard Model and a hidden strongly coupled S U(N)h gauge sector and discuss the seenarios in which the new scalars are identified as the messenger fields that mediate the spontaneously broken supersymmetries from the hidden sector to the visible *** new scalars are embedded into 5-plets and 10-plets of an S(/(5)v gauge group that potentially unifies the Standard Model gauge *** Higgs bosons remain as elementary *** the supersymmetrized version of this class of models,vector-like fermions whose left-handed components are superpartners of the new scalars are *** to the hidden strong force,the new low-energy scalars hadronize before decaying and thus evade the common direct searches of the supersymmetric *** can be seen as a gauge mediation seenario with the scalar messenger fields forming low-energy bound *** also discuss the possibility that in the tower of bound states formed under hidden strong dynamics(of at least the TeV scale),there exist a dark matter candidate and the collider signatures(***,diboson,or dijet)of models that may show up in the near future.

关键词： collider searches beyond the standard model extra complex scalars

Identification of Potential Zinc Deficiency Responsive Genes and Regulatory Pathways in Rice by Weighted Gene Co-expression Network Analysis

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Rice science 2022年第6期29卷 545-558页

作者： Blaise Pascal MUVUNYI LU Xiang zhan Junhui HE Sang ye Guoyou CAAS-IRRI Joint Laboratory for Genomics-Assisted Germplasm Enhancement Agricultural Genomics Institute in ShenzhenChinese Academy of Agricultural Sciences(CAAS)Shenzhen 518120China Rice Breeding Innovations Platform International Rice Research Institute(IRRI)Metro Manila 1301the Philippines

Zinc(Zn)malnutrition is a major public health *** biofortification of Zn in rice grain can alleviate global Zn ***,elucidating the genetic mechanisms regulating Zn deprivation response in rice is essential to identify elite genes useful for breeding high grain Zn rice ***,a meta-analysis of previous RNA-Seq studies involving Zn deficient conditions was conducted using the weighted gene co-expression network analysis(WGCNA)and other in silico prediction tools to identify modules(denoting cluster of genes with related expression pattern)of co-expressed genes,modular genes which are conserved differentially expressed genes(DEGs)across independent RNA-Seq studies,and the molecular pathways of the conserved modular *** identified 16 modules of co-expressed ***-eight and five modular DEGs were conserved in leaf and crown,and root tissues across two independent RNA-Seq *** enrichment analysis showed that 24 of the 28 conserved modular DEGs from leaf and crown tissues significantly up-regulated 2 Kyoto Encyclopedia of Genes and Genomes(KEGG)pathways and 15 Gene Ontology(GO)terms,including the substrate-specific transmembrane transporter and the small molecule metabolic ***,the well-studied transcription factors(OsWOX11 and OsbHLH120),protein kinase(OsCDPK20 and OsMPK17),and miRNAs(OSA-MIR397A and OSA-MIR397B)were predicted to target some of the identified conserved modular *** of the 24 conserved and up-regulated modular DEGs,19 were yet to be experimentally validated as Zn deficiency responsive *** from this study provide a comprehensive insight on the molecular mechanisms of Zn deficiency response and may facilitate gene and pathway prioritization for improving Zn use efficiency and Zn biofortification in rice.

关键词： rice biofortification zinc deficiency gene expression weighted gene co-expression network analysis

Recent Advances in Boron-Containing Acenes:Synthesis,Properties,and Optoelectronic Applications

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Chinese Journal of Chemistry 2023年第11期41卷 1355-1373页

作者： Yongkang Guo cheng Chen Xiao-ye Wang State Key Laboratory of Elemento-Organic Chemistry Frontiers Science Center for New Organic MatterCollege of ChemistryNankai UniversityTianjin300071 China

Acenes with linearly fused benzene rings have attracted much attention due to their intriguing optical and electronic ***,the poor ambient stability of longer acenes has hampered the investigation of their physicochemical properties and potential *** incorporation of main group elements into the acene backbones provides a viable strategy to enhance the stability,and meanwhile,generates a new family of heteroatom-doped acenes(namely heteroacenes)with modified properties and *** particular,boron-containing acenes represent an attractive class of heteroacenes owing to the existence of vacant p orbital of boron,which endows theπ-conjugated systems with appealing features,such as Lewis acidity,electron-accepting capability,stimuli-responsivity,and adjustable photophysical *** the past decade,significant progress has been achieved in the synthesis and applications of boron-containing acenes,but a focused review on this topic has been ***,we summarize the recent advances in the studies on boron-containing acenes,covering their synthesis,intriguing properties,and various applications in electroluminescence and electronic devices,as well as in biosensors,*** hope that this timely review will stimulate new research interest in this unique family of materials and promote their optoelectronic applications.

关键词： Acenes Boron Heteroacenes Luminophores Multi-color emission Light-emitting devices Organic optoelectronics Organicsemiconductors

Stable silver nanoparticles–aptamer bioconjugates for cellular prion protein imaging

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Chinese Science Bulletin 2014年第10期59卷 964-970页

作者： Lei zhan Li Peng cheng-Zhi Huang Education Ministry Key Laboratory on Luminescence and RealTime Analysis College of Chemistry and Chemical EngineeringSouthwest University College of Life Sciences Southwest University College of Pharmaceutical Sciences Southwest University

Combining the unique optical properties of metal nanoparticles and the specific recognition of aptamer,aptamer–nanoparticle conjugates have been extensively used in a wide range of applications,particularly multifunctional nanoparticles for cell detection and molecular *** conjugates prepared by chemisorption of monothiol-modified oligonucleotides onto nanoparticle surfaces suffer from a lack of stability when exposed to a variety of small *** silver is used in place of gold,then this lack of stability is even more *** this study,we reported here the effective and facile strategy of preparing stable silver nanoparticle–aptamer conjugates by in situ generation of strong metal affinity capping ligands,dithiocarbamates modified anti-prion protein *** conjugates produced are stable and can withstand NaCl concentration at0.25 mol/***,they could be applied in the cellular prion protein imaging successfully.

关键词： nanoparticles Aptamer Dithiocarbamate Cellular prion protein

Effect of Cold Rolling Parameters on the Longitudinal Residual Stress Distribution of GH4169 Alloy Sheet

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Acta Metallurgica Sinica(English Letters) 2015年第12期28卷 1510-1517页

作者： Neng-Yong ye Ming cheng Shi-Hong zhang Institute of Metal Research Chinese Academy of Sciences

For plastic deformed parts, the dimensional accuracy is significantly affected by residual stresses and so does the performance in service. Therefore, the rolling process of GH4169 alloy sheet at room temperature was investigated by finite element method. The effects of rolling reduction, friction coefficient, rolling velocity and initial stress on the longitudinal residual stress distribution over the thickness of GH4169 alloy sheet were analyzed. The results show that the values of longitudinal residual stress can be slightly reduced by increasing the rolling reduction and velocity. The longitudinal residual stress over the thickness distributes as ‘‘V＇＇ type or weak ‘‘W＇＇ type. The initial stress mainly has an effect on the longitudinal stress in the backward slip area. But the friction coefficient has remarkable influence on longitudinal residual stress. With the friction coefficient increasing from 0.1 to 0.5, the value of longitudinal residual stress on the sheet surface is reduced by 282 MPa. Simultaneously, the tensile stress turns into compressive stress with a strong‘‘W＇＇ type distribution.

关键词： GH4169 alloy Cold rolling Residual stress Process parameters

Large negative hyperpolariza-bilities (β) of the protonated Schiff bases of the azulenic retinal analogues

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Chinese Science Bulletin 2001年第10期46卷 831-835页

作者： Peng Wang cheng ye Center for Molecular Science Laboratory of Organic Solids Institute of Chemistry Chinese Academy of Sciences Beijing China

The molecular first hyperpolarizabilities (β) and electronic properties of some azulenic retinal analogues and their derivatives have been investigated theoretically by employing semiempirical approaches. The results indicate that the protonated Schiff bases (PSB) of the 2-substituted azulenic retinal analogues possess extremely large negative β values and very good transparency. These can be attributed to the large difference between the ground state dipole moment and the first excited state dipole moment according to the electronic property analysis. The characteristic blue-shifted absorption in polar solvents of the 2-substituted PSB chromophores can be well explained by the negative solva-tochromic effects. The largest calculated |μβ| value can reach the magnitude of 10-44 esu, which is close to the highest reported values of synthesized chromophores.

关键词： molecular first hyperpolarizability nonlinear optics azulene retinal derivatives theoretical calculation.

Phosphorus Removal of High Phosphorus Iron Ore by Gas-Based Reduction and Melt Separation

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Journal of Iron and Steel Research International 2010年第9期17卷 1-6页

作者： TANG Hui-qing GUO zhan-cheng ZHAO Zhi-long Key Laboratory of Ecological and Recycle Metallurgy of Ministry of Education University of Science and Technology Beijing Beijing 100083 China

A new method （gas-based separation plus melt separation） has been proposed to remove phosphorus of the high phosphorus iron ore which was 1.25 % of phosphorus content and 50. 0% of iron content. HSC chemistry package and the coexistence theory of slag structure were adopted for theoretical analysis. The gas-based reduction was carried out using a fixed bed reactor and the ore sample of 80 g with an average particle size of 2 mm were reduced using CO or H2 at temperature of 1 073 K for 5 hours. 50 g of the reduced sample with 3.0% CaO as additive was then subjected to melt separation in an electric furnace at temperature of 1 873 K under Ar atmosphere. In each run, SEM, EDS, optical microscopic examination and chemical analysis of the reduced ore sample, the metal sample and the slag sample were conducted. Results of all gas-based reduction experiments showed that iron metallization ratios were some 65% and the phosphorus compounds in the ore remained unchanged. It was agreed well with the simula- tions except for the iron metallization rate being less than predicted value; this difference was attributed to kinetics. Results of melt separation experiments showed that P content in metal samples is 0.33% （metal sample from H2 reduction product） and 0.27% （metal sample from CO reduction product）. The phosphorus partition ratios of both cases were less than predicted values. Some P in the metal samples existed as slag inclusion was considered to be the reason for this discrepancy.

关键词： HSC chemistry package coexistence theory slag structure high phosphorus iron ore gas-based reduction melt separation

A miniature triaxial apparatus for investigating the micromechanics of granular soils with in situ X-ray micro-tomography scanning

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Frontiers of Structural and Civil Engineering 2020年第2期14卷 357-373页

作者： Zhuang cheng Jianfeng WANG Matthew Richard COOP Guanlin ye Department of Architecture and Civil Engineering City University of Hong KongHong Kong 999077China Shenzhen Research Institute of City University of Hong Kong Shenzhen 518057China Department of Civil Environmental and Geomatic EngineeringUniversity College LondonLondon WC1E 6BTUK Department of Civil Engineering Shanghai Jiaotong UniversityShanghai 200240China

The development of a miniature triaxial apparatus is *** conjunction with an X-ray microtomography(termed as X-ray fiCT hereafter)facility and advanced image processing techniques,this apparatus can be used for in situ investigation of the micro-scale mechanical behavior of granular soils under *** apparatus allows for triaxial testing of a miniature dry sample with a size of 8 mm x 16 mm(diameter x height).In situ triaxial testing of a 0.4-0.8 mm Leighton Buzzard sand(LBS)under a constant confining pressure of 500 kPa is *** evolutions of local porosities(i.e.,the porosities of regions associated with individual particles),particle kinematics(i.e.,particle translation and particle rotation)of the sample during the shear are quantitatively studied using image processing and analysis ***,a novel method is presented to quantify the volumetric strain distribution of the sample based on the results of local porosities and particle *** is found that the sample,with nearly homogenous initial local porosities,starts to exhibit obvious inhomogeneity of local porosities and localization of particle kinematics and volumetric strain around the peak of deviatoric *** the post-peak shear stage,large local porosities and volumetric dilation mainly occur in a localized *** developed triaxial apparatus,in its combined use of X-ray|iCT imaging techniques,is a powerful tool to investigate the micro-scale mechanical behavior of granular soils.

关键词： triaxial apparatus X-ray fiCT in situ test micro-scale mechanical behavior granular soils

Structural characteristic and ammonium and manganese catalytic activity of two types of filter media in groundwater treatment

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Journal of Environmental Sciences 2018年第10期30卷 89-97页

作者： Ya cheng Tinglin Huang Lijie cheng Yuankui Sun Laisheng Zhu ye Li Key Laboratory of Northwest Resource Environment and Ecology MOE Xi'an University of Architecture and Technology Xi'an 710055 China Shaanxi Key Laboratory of Environmental Engineering Xi'an University of Architecture and TechnologyXi'an 710055 China

Two types of filter media in groundwater treatment were conducted for a comparative study of surface structure and catalytic performance. Natural filter media was adopted from a conventional aeration–filtration groundwater treatment plant, and active filter media as a novel and promising filter media was also adopted. The physicochemical properties of these two kinds of filter media were characterized using numerous analytical techniques,such as X-Ray diffraction（XRD）, scanning electron microscope（SEM）, energy dispersive X-ray（EDX）, X-ray photoelectron spectroscopy（XPS） and Zeta potential. The catalytic activities of these filter media were evaluated for ammonium and manganese *** data showed that both active filter media and natural filter media belonged to birnessite family. A new manganese dioxide（Mn O2） phase（PDF#72-1982） was found in the structure of natural filter media. The SEM micrograph of natural filter media showed honeycomb structures and the active filter media presented plate structures and consisted of stacked particle. These natural filter media presented lower level of some trace elements such as calcium and magnesium, lower degree of crystallinity, lower Mn（III） content and lattice oxygen content than that of active filter media, which were associated with its poor ammonium and manganese catalytic activities. In addition, some γ-Fe2 O3 and Mn CO3 were found in the coating which may hinder the ammonium and manganese catalytic oxidation. This study provides a thorough and comprehensive understanding about the most commonly used filter media in water treatment, which can provide a theoretical guide to practical applications.

关键词： Natural filter media Active filter media Manganese and ammonium removal Manganese oxides Characterization Activity