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COMPARISON OF CHARGED PARTICLE MULTIPLICITIES IN THREE-JET AND TWO-JET EVENTS FROM e^(+)e^(-) ANNIHILATION AT HIGH ENERGIES

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Chinese Physics Letters 1989年第5期6卷 193-196页

作者： liu Ximing Department of Physics Shandong UniversityJinan

The charged particle multiplicity(n3j) in the three-jet events in e^(+)e^(-) annihilation is *** comparison of(n3j) with (n2j) is *** prediction of the multiplicity agrees well with ***,some predictions for high energ... 详细信息

关键词： multiplicity annihilation

Phase transformation behavior and mechanical properties of Ti_(50)Ni_(49-x) Fe_1Co_x shape memory alloys

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Rare Metals 2013年第3期32卷 225-227页

作者： Bin Chen Fu-Shun liu School of Materials Science and Engineering Beijing University of Aeronautics and Astronautics

In this article, the influence of Co addition on phase transformation behavior and mechanical properties of TiNiFe shape memory alloy was investigated extensively. Differential scanning calorimetry （DSC） measurements shows that martensitic start transformation temperatures （Ms） decrease drastically with increasing Co content, while the R phase transformation start temperatures （Rs） vary slightly. Nevertheless, the substitution of Ni with Co does not exert substantial influence on the two-stage transformation behavior of the TiNiFe alloy. The results from stress-strain curves indicate that higher critical stress for stress-induced martensitic transformation （σSIM） has been obtained because of Co addition. In such cases, the Ti50Ni48sFelCO1.0 alloy maintains a good shape memory effect, and a maximum recoverable strain of 7.5 % can be obtained.

关键词： Ms σSIM Shape memory effect

Phylotype resolved spatial variation and association patterns of planktonic Thaumarchaeota in eastern Chinese marginal seas

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Marine Life Science & Technology 2023年第2期5卷 257-270页

作者： Jiwen liu Fuyan Huang Jiao liu Xiaoyue liu Ruiyun Lin Xiaosong Zhong Brian Austin Xiao-Hua Zhang Frontiers Science Center for Deep Ocean Multispheres and Earth System and College of Marine Life SciencesOcean University of ChinaQingdao 266100China Laboratory for Marine Ecology and Environmental Science Laoshan LaboratoryQingdao 266237China Institute of Evolution and Marine Biodiversity Ocean University of ChinaQingdao 266003China Key Laboratory of Marine Chemistry Theory and Technology Ministry of EducationQingdao 266100China Institute of Aquaculture University of StirlingStirling FK94LAScotlandUK

The majority of marine ammonia oxidizers belong to Thaumarchaeota,a phylum of Archaea,which is distributed throughout the water *** surface waters contain distinct thaumarchaeotal phylotypes compared to the deeper ocean,but spatial dynamics of the surface-associated lineages are largely *** study of 120 seawater samples from the eastern Chinese marginal seas identifed contrasting distribution and association patterns among thaumarchaeotal phylotypes across diferent ***,Nitrosopumilus-like and Nitrosopelagicus-like phylotypes dominated the surface water(3 m)of the Yellow Sea(YS)and East China Sea(ECS),respectively,along with increased abundance of total free-living Thaumarchaeota in *** compositional changes were observed in the surface *** spatial heterogeneity of particle-attached Thaumarchaeota was less clear in surface microlayers than in surface ***,the Nitrosopelagicus-like phylotype increased in abundance from surface to 90 m in ECS,which led to an increase in the proportion of Thaumarchaeota relative to total *** occurred mainly in the free-living *** results indicate a clear size-fractionated niche partitioning,which is more pronounced at lower depths than in the surface water/surface *** addition,associations of Thaumarchaeota with other microbial taxa varied between phylotypes and size *** results show that a phylotype-resolved and size-fractionated spatial heterogeneity of the thaumarchaeotal community is present in surface oceanic waters and a vertical variation of the Nitrosopelagicus-like phylotype is present in shallow shelf waters.

关键词： Thaumarchaeota Phylotype Association pattern Spatial variation Surface microlayer Chinese marginal seas

The human-derived novel gut commensal Luoshenia tenuis regulates body weight and food intake in mice

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Food Science and Human Wellness 2024年第2期13卷 830-841页

作者： Yu Jiang Mengxuan Du Lisheng Xie Minzhi Jiang Yaokun Zhang Mingxia Bi Chang liu Hongwei liu Shuangjiang liu State Key Laboratory of Microbial Technology Shandong UniversityQingdao 266237China State Key Laboratory of Microbial Resources Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China College of Life Science Hebei UniversityBaoding 071000China State Key Laboratory of Mycology Institute of MicrobiologyChinese Academy of SciencesBeijing 100101China

Many studies have revealed that gut microbes modulate host *** this study,we characterized the therapeutic effects of a novel gut commensal Luoshenia tenuis against host metabolic ***,by in silico analysis,we demonstrated that the *** was prevalent in the gut microbiomes of healthy humans but were depleted specifically in obesity *** in vitro cultivation revealed that *** produced short chain fatty acids that were verified to modulate host metabolism and some other volatile metabolites to benefit hosts by anti-inflammation and ***,gavage of the *** significantly decreased the body weight gain and food intake of high-fat diet-feeding C57BL/6J mice,which was in parallel with the changed expression level of genes related to satiety and feeding *** then performed the gavage trial using diet induced obese mice,and it revealed that the administration of *** alleviated significantly the abnormal glucose and lipid metabolisms and reduced the inflammatory *** summary,this study revealed a previously-unknown human gut commensal microbe that benefited host metabolism,and set the stage for the development of novel next-generation probiotic applicable for treatment of obesity and related metabolic disorders.

关键词： Luoshenia tenuis Gut microbe Feeding behavior Obesity Next-generation probiotic

A Converse Theorem for Split SO_(2l) over Finite Fields

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Acta Mathematica Sinica,English Series 2024年第3期40卷 731-771页

作者： Alexander HAZELTINE Bai Ying liu Department of Mathematics Purdue University150 N.University St.West LafayetteIN 47907USA E-mail:ahazelti@purdue.edu liu2053@purdue.edu

We prove a converse theorem for split even special orthogonal groups over finite *** is the only case left on converse theorems of classical groups and the difficulty is the existence of the outer automorphism. In thi... 详细信息

关键词： Converse theorems generic cuspidal representations even special orthogonal groups

A new type of cell related to organ movement for selfing in plants

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National Science Review 2023年第9期10卷 190-203页

作者： Yin-Zheng Wang Yan-Xiang Lin Qi liu Jing liu Spencer C.H.Barrett State Key Laboratory of Systematic and Evolutionary Botany Institute of BotanyChinese Academy of Sciences China National Botanical Garden College of Life Sciences University of Chinese Academy of Sciences College of Pharmacy Fujian University of Traditional Chinese Medicine Department of Ecology and Evolutionary Biology University of Toronto

Many plants employ osmotic and hydrostatic pressure to generate movement for survival,but little is known about the cellular mechanisms ***,we report a new cell type in angiosperms termed ’contractile cells’ in the stigmas of the flowering plant Chirita pumila with a much-expanded rough endoplasmic reticulum(RER).Cryo-scanning electron microscopy and transmission electron microscopy analyses revealed that the RER is continuously distributed throughout the entirety of cells,confirmed by endoplasmic reticulum(ER)-specific fluorescent labeling,and is distinct from the common feature of plant *** RER is water-sensitive and extremely elongated with water *** show that the contractile cells drive circadian stigma closing-bending movements in response to day-to-night moisture ***-seq analyses demonstrated that contractile cells have distinct molecular ***,multiple microstructural changes in stigma movements convert an anti-selfing structure into a device promoting selfing—a unique cellular mechanism of reproductive adaptation for uncertain pollination environments.

关键词： stigma movement rough endoplasmic reticulum contractile cells circadian moisture changes reproductive transition

The Non-contractibility of Closed Geodesics on Finsler RP^(n)

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Acta Mathematica Sinica,English Series 2022年第1期38卷 1-21页

作者： Hua Gui DUAN Hui liu School of Mathematical Sciences and LPMC Nankai UniversityTianjin 300071P.R.China School of Mathematics and Statistics Wuhan UniversityWuhan 430072P.R.China

Let(RP^(n),F)be a bumpy and irreversible Finsler n-dimensional real projective space with reversibilityλand flag curvature K satisfying(λ/1+λ)^(2) 详细信息

Let(RP^(n),F)be a bumpy and irreversible Finsler n-dimensional real projective space with reversibilityλand flag curvature K satisfying(λ/1+λ)^(2)

关键词： Closed geodesics non-contractible real projective space enhanced common index jump theorem

The m^(6)A reader YTHDC2 maintains visual function and retinal photoreceptor survival through modulating translation of PPEF2 and PDE6B

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Journal of Genetics and Genomics 2024年第2期51卷 208-221页

作者： Yeming Yang Xiaoyan Jiang Junyao Chen Lu liu Guo liu Kuanxiang Sun Wenjing liu Xianjun Zhu Qiuyue Guan The Sichuan Provincial Key Laboratory for Human Disease Gene Study Center for Medical GeneticsSichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China Department of Geriatrics Sichuan Provincial People's HospitalUniversity of Electronic Science and Technology of ChinaChengduSichuan 610072China Research Unit for Blindness Prevention of Chinese Academy of Medical Sciences(2019RU026) Sichuan Academy of Medical Sciences and Sichuan Provincial People's HospitalChengduSichuan 610072China Qinghai Key Laboratory of Qinghai Tibet Plateau Biological Resources Chinese Academy of Sciences and Qinghai Provincial Key Laboratory of Tibetan Medicine ResearchNorthwest Institute of Plateau BiologyXiningQinghai 810008China Henan Eye Institute Henan Eye HospitalPeople's Hospital of Zhengzhou UniversityHenan Provincial People's HospitalZhengzhouHenan 450003China

Inherited retinal dystrophies (IRDs) are major causes of visual impairment and irreversible blindness worldwide, while the precise molecular and genetic mechanisms are still elusive. N6-methyladenosine (m^(6)A) modification is the most prevalent internal modification in eukaryotic mRNA. YTH domain containing 2 (YTHDC2), an m^(6)A reader protein, has recently been identified as a key player in germline development and human cancer. However, its contribution to retinal function remains unknown. Here, we explore the role of YTHDC2 in the visual function of retinal rod photoreceptors by generating rod-specific Ythdc2 knockout mice. Results show that Ythdc2 deficiency in rods causes diminished scotopic ERG responses and progressive retinal degeneration. Multi-omics analysis further identifies Ppef2 and Pde6b as the potential targets of YTHDC2 in the retina. Specifically, via its YTH domain, YTHDC2 recognizes and binds m^(6)A-modified Ppef2 mRNA at the coding sequence and Pde6b mRNA at the 5′-UTR, resulting in enhanced translation efficiency without affecting mRNA levels. Compromised translation efficiency of Ppef2 and Pde6b after YTHDC2 depletion ultimately leads to decreased protein levels in the retina, impaired retinal function, and progressive rod death. Collectively, our finding highlights the importance of YTHDC2 in visual function and photoreceptor survival, which provides an unreported elucidation of IRD pathogenesis via epitranscriptomics.

关键词： Epitranscriptomics N^(6)-methyladenosine(m^(6)A) Inherited retinal dystrophies YTHDC2 Retina function Photoreceptor degeneration

Microbes and host dance in harmony or disarray？

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Protein & Cell 2018年第5期9卷 395-396页

作者： Zhihua liu CAS Key Laboratory of Infection and Immunity CAS Center for Excellence in Biomacromolecules Institute of Biophysics hinese Academy of Sciences Beijing 100101 China

We are not alone. Trillion of microbes （bacteria, fungi, virus and protozoa） take residence on and in our bodies. Despite their large number, their roles in our health had been largely ignored until recently. Advances in sequencing technologies have helped us to realize the diversity and dynamics of microbes associated with our bodies. A number of interna- tional microbiome consortium programs have suggested connections between dysbiosis and a range of human dis- eases, including metabolic syndrome, autoimmune diseases, autism and many others. Furthermore, use of antibiotics has been found to reduce the efficacy of cancer immunotherapies. Currently, the microbiome is attracting enormous research interest internationally and has become a frontier in life sciences.

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