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Elusive workers are more likely to differentiate into replacement reproductives than aggressive workers in a lower termite

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Current Zoology 2023年第3期69卷 332-338页

作者： Zhuang-Dong bai Chong-Yang Shi David Sillam-Dusses Rui-Wu Wang School of Ecology and Environment Northwestern Polytechnical UniversityXi'an 710072China Laboratory of Experimental and Comparative Ethology LEECUR 4443University Sorbonne Paris NordVilletaneuseFrance

One of the most intriguing questions in eusocial insects is to understand how the overt reproductive conflict in the colony appears limited when queens or kings are senescent or lost because the morphologically similar individuals in the colony are reproductively totipotent.Whether there are some individuals who preferentially differentiate into replacement reproductives or not has received little attention.The consistent individual behavioral differences(also termed“animal personality”)of individuals from the colony can shape cunningly their task and consequently affect the colony fitness but have been rarely investigated in eusocial insects.Here,we used the termite Reticulitermes labralis to investigate if variations in individual personalities(elusiveness and aggressiveness)may predict which individuals will perform reproductive differentiation within colonies.We observed that when we separately reared elusive and aggressive workers,elusive workers differentiate into reproductives significantly earlier than aggressive workers.When we reared them together in the proportions 12:3,10:5,and 8:7(aggressive workers:elusive workers),the first reproductives mostly differentiated from the elusive workers,and the reproductives differentiated from the elusive workers significantly earlier than from aggressive workers.Furthermore,we found that the number of workers participating in reproductive differentiation was significantly lower in the groups of both types of workers than in groups containing only elusive workers.Our results demonstrate that the elusiveness trait was a strong predictor of workers’differentiation into replacement reproductives in R.labralis.Moreover,our results suggest that individual personalities within the insect society could play a key role in resolving the overt reproductive conflict.

关键词： consistent individual behavioral differences reproductive conflict reproductive differentiation,Reticulitermes labralis termite

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Ecological selection of bacterial taxa with larger genome sizes in response to polycyclic aromatic hydrocarbons stress

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Journal of Environmental Sciences 2022年第2期34卷 82-93页

作者： Yuzhu dong Shanghua Wu Haonan Fan Xianglong Li Yijing Li Shengjun Xu Zhihui bai Xuliang zhuang Key Laboratory of Environmental Biotechnology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China College of Resources and Environment University of Chinese Academy of SciencesBeijing 200049China College of Sino-Danish Center University of Chinese Academy of SciencesBeijing 100049China

Polycyclic aromatic hydrocarbons(PAHs)are ubiquitous priority pollutants that cause great damage to the natural environment and health.Average genome size in a community is critical for shedding light on microbiome's functional response to pollution stress within an environment.Here,microcosms under different concentrations were performed to evaluate the selection of PAHs stress on the average genome size in a community.We found the distinct communities of significantly larger genome size with the increase of PAHs concentration gradients in soils,and consistent trends were discovered in soils at different latitudes.The abundance of Proteobacteria and Deinococcus-Thermus with relatively larger genomes increased along with PAHs stress and well adapted to polluted environments.In contrast,the abundance of Patescibacteria with a highly streamlined and smaller genome decreased,implying complex interactions between environmental selection and functional fitness resulted in bacteria with larger genomes becoming more abundant.Moreover,we confirmed the increased capacity for horizontal transfer of degrading genes between communities by showing an increased connection number per node positively related to the nid A gene along the concentration gradients in the co-occurrence network.Our findings suggest PAHs tend to select bacterial taxa with larger genome sizes,with significant consequences for community stability and potential biodegradation strategies.

关键词： Pollution stress Polycyclic aromatic hydrocarbons(PAHs) Genome size Horizontal gene transfer Soil microbial community

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Genome-wide interrogation of transfer RNA-derived small RNAs in a mouse model of traumatic brain injury

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Neural Regeneration Research 2022年第2期17卷 386-394页

作者： Xiao-Jian Xu Meng-Shi Yang Bin Zhang Qian-Qian Ge Fei Niu Jin-Qian dong Yuan zhuang bai-Yun Liu Beijing Key Laboratory of Central Nervous System Injury Beijing Neurosurgical InstituteCapital Medical UniversityBeijingChina Beijing Key Laboratory of Central Nervous System Injury and Department of Neurosurgery Beijing Neurosurgical Institute and Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Nerve Injury and Repair Center of Beijing Institute for Brain Disorders BeijingChina China National Clinical Research Center for Neurological Diseases BeijingChina

Transfer RNA(t RNA)-derived small RNAs(ts RNAs) are a recently established family of regulatory small non-coding RNAs that modulate diverse biological processes. Growing evidence indicates that ts RNAs are involved in neurological disorders and play a role in the pathogenesis of neurodegenerative disease. However, whether ts RNAs are involved in traumatic brain injury-induced secondary injury remains poorly understood. In this study, a mouse controlled cortical impact model of traumatic brain injury was established, and integrated ts RNA and messenger RNA(m RNA) transcriptome sequencing were used. The results revealed that 103 ts RNAs were differentially expressed in the mouse model of traumatic brain injury at 72 hours, of which 56 ts RNAs were upregulated and 47 ts RNAs were downregulated. Based on micro RNA-like seed matching and Pearson correlation analysis, 57 differentially expressed ts RNA-m RNA interaction pairs were identified, including 29 ts RNAs and 26 m RNAs. Moreover, Gene Ontology annotation of target genes revealed that the significantly enriched terms were primarily associated with inflammation and synaptic function. Collectively, our findings suggest that ts RNAs may be associated with traumatic brain injury-induced secondary brain injury, and are thus a potential therapeutic target for traumatic brain injury. The study was approved by the Beijing Neurosurgical Institute Animal Care and Use Committee(approval No. 20190411) on April 11, 2019.

关键词： gene set enrichment analysis inflammation integrated analysis neurodegenerative disease next-generation sequencing secondary injury synaptic function transfer RNA-derived small RNAs transfer RNAs traumatic brain injury

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Impact of finite-range tensor terms in the Gogny force on theβ-decay of magic nuclei

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Nuclear Science and Techniques 2021年第7期32卷 83-89页

作者： Da-zhuang Chen dong-Liang Fang Chun-Lin bai College of Physics Sichuan UniversityChengdu 610065China Institute of Modern Physics Chinese Academy of SciencesLanzhou 730000China University of Chinese Academy of Sciences Beijing 100049China

Effects of finite-range tensor force onβ-decay of magic and semimagic nuclei of^(34)Si,^(68,78)Ni,and^(132)Sn have been investigated using the self-consistent Hartree–Fock plus random-phase approximation model.The tensor force shifts the low-lying Gamow–Teller states downward and systematically improves the calculations of Q and logft values.Consequently,it systematically reduces the deviations between the theoretical and experimental data and significantly improves the calculation ofβ-decay half-lives.This effect is similar to that of zero-range tensor force.

关键词： tensor decay finite

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Neutrophil-derived interleukin-17A participates in neuroinflammation induced by traumatic brain injury

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Neural Regeneration Research 2023年第5期18卷 1046-1051页

作者： Xiao-Jian Xu Qian-Qian Ge Meng-Shi Yang Yuan zhuang Bin Zhang Jin-Qian dong Fei Niu Hao Li bai-Yun Liu Beijing Key Laboratory of Central Nervous System Injury Beijing Neurosurgical InstituteCapital Medical UniversityBeijingChina Beijing Key Laboratory of Central Nervous System Injury and Department of Neurosurgery Beijing Neurosurgical Institute and Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Nerve Injury and Repair Center of Beijing Institute for Brain Disorders BeijingChina China National Clinical Research Center for Neurological Diseases BeijingChina

After brain injury, infiltration and abnormal activation of neutrophils damages brain tissue and worsens inflammation, but the mediators that connect activated neutrophils with neuroinflammation have not yet been fully clarified. To identify regulators of neutrophil-mediated neuroinflammation after traumatic brain injury, a mouse model of traumatic brain injury was established by controlled cortical impact. At 7 days post-injury(sub-acute phase), genome-wide transcriptomic data showed that interleukin 17 A-associated signaling pathways were markedly upregulated, suggesting that interleukin 17 A may be involved in neuroinflammation. Double immunofluorescence staining showed that interleukin 17 A was largely secreted by neutrophils rather than by glial cells and neurons. Furthermore, nuclear factor-kappaB and Stat3, both of which are important effectors in interleukin 17 A-mediated proinflammatory responses, were significantly activated. Collectively, our findings suggest that neutrophil-derived interleukin 17 A participates in neutrophil-mediated neuroinflammation during the subacute phase of traumatic brain injury. Therefore, interleukin 17 A may be a promising therapeutic target for traumatic brain injury.

关键词： immune infiltration innate immunity interleukin-17A neurodegenerative disease neuroinflammation neutrophils secondary brain injury transcription factor transcriptome traumatic brain injury

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Tandem Mass Tag-based proteomics analysis reveals the vital role of inflammation in traumatic brain injury in a mouse model

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Neural Regeneration Research 2023年第1期18卷 155-161页

作者： Jin-Qian dong Qian-Qian Ge Sheng-Hua Lu Meng-Shi Yang Yuan zhuang Bin Zhang Fei Niu Xiao-Jian Xu bai-Yun Liu Department of Neurosurgery Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Beijing Key Laboratory of Central Nervous System Injury Beijing Neurosurgical InstituteCapital Medical UniversityBeijingChina Center for Nerve Injury and Repair Beijing Institute of Brain DisordersBeijingChina China National Clinical Research Center for Neurological Diseases BeijingChina

Proteomics is a powerful tool that can be used to elucidate the underlying mechanisms of diseases and identify new biomarkers.Therefore,it may also be helpful for understanding the detailed pathological mechanism of traumatic brain injury(TBI).In this study,we performed Tandem Mass Tag-based quantitative analysis of cortical proteome profiles in a mouse model of TBI.Our results showed that there were 302 differentially expressed proteins in TBI mice compared with normal mice 7 days after injury.Gene Ontology and Kyoto Encyclopedia of Genes and Genomes pathway analyses showed that these differentially expressed proteins were predominantly involved in inflammatory responses,including complement and coagulation cascades,as well as chemokine signaling pathways.Subsequent transcription factor analysis revealed that the inflammation-related transcription factors NF-κB1,RelA,IRF1,STAT1,and Spi1 play pivotal roles in the secondary injury that occurs after TBI,which further corroborates the functional enrichment for inflammatory factors.Our results suggest that inflammation-related proteins and inflammatory responses are promising targets for the treatment of TBI.

关键词： bioinformatics complement cascade mass spectrometry neuroinflammation proteomics secondary injury subacute phase tandem mass tag transcription factor traumatic brain injury

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Geochemical characteristics and genetic type of a lithium ore (mineralized) body in the central Yunnan Province, China

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China Geology 2019年第3期2卷 287-300页

作者： bai-dong Sun Jun-ping Liu Xiao-hu Wang Yan Dao Gui-xiang Xu Xiao-zhuang Xue-qing Guan Wei Wang dong-hu Song Yunnan Institute of Geological Survey Kunming 650216China Kunming University of Science and Technology Kunming 650093China Chengdu Center China Geological SurveyMinistry of Natural ResourcesChengdu 610081China

Lithium ore (mineralized) bodies in the area A of central Yunnan Province belong to a sedimentary-type, which are controlled by stratum. The studied ore (mineralized) body mainly occurs in the Middle Permian Liangshan Formation. This work described the morphology, structures, main ore types and geochemical characteristics of this ore body in detail, and discussed the ore-forming material source, occurrence state of lithium and the formation mechanism of lithium ores to clarify the prospecting marks. In the further exploration, comprehensive evaluation of the lithium resources of known bauxite ore bodies in central Yunnan Province should be strengthened, and the exploration of hidden lithium ore bodies should be intensified in order to discover more large and super-large lithium orebodies, which will fill the gap of the national demand for lithium resources, and promote the national defense construction and new energy industry development.

关键词： Sedimentary-type lithium deposit Stratified deposit Geochemical characteristics Metallogenic mechanism Mineral resources exploration engineering Yunnan Province China

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Break the strength-ductility trade-off in a transformation-induced plasticity high-entropy alloy reinforced with precipitation strengthening

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Journal of Materials Science & Technology 2022年第13期108卷 125-132页

作者： dong Huang Yanxin zhuang Key Laboratory of Electromagnetic Processing of Materials(Ministry of Education) Northeastern UniversityShenyang110819China

Transformation-induced plasticity(TRIP)endows material with continuous work hardening ability,which is considered as a powerful weapon to break the strength-ductility tradeoff.However,FCC based alloys with TRIP effect can not get rid of the“soft”feature of the structure entirely,resulting in insufficient yield strength.Here,a Co_(x)Cr_(25)(AlFeNi)_(75-x) high-entropy alloy is designed.NiAl phase is used as strengthening component to improve yield strength,while TRIP effect ensures plasticity.Compared with the previous TRIP high-entropy alloy,its yield strength is nearly doubled,and the uniform elongation is more than 55%at room temperature.Furthermore,the corresponding multiphase microstructure evolution and deformation mechanisms are investigated.Significantly,stacking faults andΣ3 twin boundaries are confirmed to be the nucleation sites of HCP phase by HAADF-STEM.Ingenious composition design and proper heat treatment process make it a perfect combination of precipitation strengthening and transformationinduced plasticity,and thus guide design in the high-performance alloy.

关键词： High-entropy alloys Transformation-induced plasticity Precipitation strengthening Nucleation site HAADF-STEM

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FePO4-coated Li[Li0.2Ni0.13Co0.13Mn0.54]O2 with improved cycling performance as cathode material for Li-ion batteries

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Rare Metals 2017年第11期36卷 899-904页

作者： Zhong Wang Hua-Quan Lu Yan-Ping Yin Xue-Yi Sun Xiang-Tao bai Xue-Ling Shen Wei-dong zhuang Shi-Gang Lu R&D Center for Vehicle and Energy Storage General Research Institute of Nonferrous Metals Beijing 100088 China China Automotive Battery Research Institue Co. Ltd Beijing 100088 China

Li[Li0.2Ni0.13Coo.13Mn0.54]O2 cathode materials were synthesized by carbonate-based co-precipitation method, and then, its surface was coated by thin layers of FePO4. The prepared samples were characterized by X-ray diffraction （XRD）, field emission scanning electron micro- scope （FESEM）, energy-dispersive spectroscopy （EDS）, and transmission electron microscopy （TEM）. The XRD and TEM results suggest that both the pristine and the coated materials have a hexagonal layered structure, and the FePO4 coating layer does not make any major change in the crystal structure. The FePO4-coated sample exhibits both improved initial discharge capacity and columbic efficiency compared to the pristine one. More significantly, the FePO4 coating layer has a much positive influence on the cycling perfor- mance. The FePO4-coated sample exhibits capacity reten- tion of 82 % after 100 cycles at 0.5℃ between 2.0 and 4.8 V, while only 28 % for the pristine one at the same charge-discharge condition. The electrochemical impe- dance spectroscopy （EIS） results indicate that this improved cycling performance could be ascribed to the presence of FePO4 on the surface of Li[Li0.2Ni0.13Co0.13Mno.54102 par- ticle, which helps to protect the cathode from chemical attacks by HF and thus suppresses the large increase in charge transfer resistance.

关键词： Cathodes Charge transfer Coated materials Coatings Crystal structure Electric batteries Electrochemical impedance spectroscopy Electrodes Energy dispersive spectroscopy Field emission cathodes High resolution transmission electron microscopy Lithium Lithium alloys Lithium compounds Manganese Nickel Precipitation (chemical) Scanning electron microscopy Secondary batteries Transmission electron microscopy X ray diffraction

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Characteristics of AZ31 Mg alloy joint using automatic TIG welding

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International Journal of Minerals,Metallurgy and Materials 2017年第1期24卷 102-108页

作者： Hong-tao Liu Ji-xue Zhou dong-qing Zhao Yun-teng Liu Jian-hua Wu Yuan-sheng Yang bai-chang Ma Hai-hua zhuang Shandong Key Laboratory for High Strength Lightweight Metallic Materials Advanced Materials InstituteShandong Academy of SciencesJinan 250014China Shandong Engineering Research Center for Lightweight Automobiles Magnesium Alloys Advanced Materials InstituteShandong Academy of SciencesJinan 250014China Institute of Metal Research Chinese Academy of SciencesShenyang 110016China

The automatic tungsten-inert gas welding（ATIGW） of AZ31 Mg alloys was performed using a six-axis robot. The evolution of the microstructure and texture of the AZ31 auto-welded joints was studied by optical microscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, and electron backscatter diffraction. The ATIGW process resulted in coarse recrystallized grains in the heat affected zone（HAZ） and epitaxial growth of columnar grains in the fusion zone（FZ）. Substantial changes of texture between the base material（BM） and the FZ were detected. The {0002} basal plane in the BM was largely parallel to the sheet rolling plane, whereas the c-axis of the crystal lattice in the FZ inclined approximately 25° with respect to the welding direction. The maximum pole density increased from 9.45 in the BM to 12.9 in the FZ. The microhardness distribution, tensile properties, and fracture features of the AZ31 auto-welded joints were also investigated.

关键词： magnesium alloys TIG welding microstructure texture microhardness

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