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Phyton-International Journal of Experimental Botany 2024年第3期93卷 467-486页

作者： Xiaojie Liang Wei An Yuekun Li Yajun Wang xiaoya Qin Yanhong Cui Shuchai Su State Key Laboratory of Efficient Production of Forest Resources The College of ForestryBeijing Forestry UniversityBeijing100083China National Wolfberry Engineering Research Center Wolfberry Science Research InstituteNingxia Academy of Agriculture and Forestry SciencesYinchuan750002China

Goji berry(Lycium barbarum L.)is substantially dependent on nitrogen fertilizer application,which can signiﬁ-cantly enhance fruit yield and Goji berry industrial development in Ningxia,*** study aimed to analyze the functions of differential nitrogen application rates including low(N1),medium(N2),and high(N3)levels in soil microbial community structure(bacterial and fungal)at 2 diverse soil depths(0-20,20-40 cm)through high-throughput sequencing technology by targeting 16S RNA gene and ITS1&ITS2 *** the observed physicochemical parameters exhibited signiﬁcant improvement(p0.05)differences among three group treatments(N1,N2,and N3).Furthermore,the functional enrichment analysis demonstrated signiﬁcant(p<0.05)enrichment of quorum sensing,cysteine and methionine metabolism,and transcriptional machinery for bacterial communities,while various saprotrophic functional roles for fungal ***,moderately reducing the use of N-supplemented fertilizers is conducive to increasing soil nitrogen utilization rate,which can contribute to sustainable agriculture practices through improved soil quality,and microbial community structure and functions.

关键词： Goji berry production Ningxia,China differential nitrogen supplementation rates 16S RNA gene and IT1&IT2 region sequencing soil physicochemical properties

High power tunable Raman fiber laser at 1.2μm waveband

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Frontiers of Optoelectronics 2024年第1期17卷 1-8页

作者： Yang Zhang Jiangming Xu Junrui Liang Jun Ye Sicheng Li xiaoya Ma Zhiyong Pan Jinyong Leng Pu Zhou College of Advanced Interdisciplinary Studies National University of Defense TechnologyChangsha 410073China Nanhu Laser Laboratory National University of Defense TechnologyChangsha 410073China Hunan Provincial Key Laboratory of High Energy Laser Technology National University of Defense TechnologyChangsha 410073China

Development of a high power fiber laser at special waveband,which is difficult to achieve by conventional rare-earth-doped fibers,is a significant *** of the most common methods for achieving lasing at special wavelength is Raman ***-doped fiber(PDF),due to the phosphorus-related large frequency shift Raman peak at 40 THz,is a great choice for large frequency shift Raman ***,by adopting 150 m large mode area triple-clad PDF as Raman gain medium,and a novel wavelength-selective feedback mechanism to suppress the silica-related Raman emission,we build a high power cladding-pumped Raman fiber laser at 1.2μm waveband.A Raman signal with power up to 735.8 W at 1252.7 nm is *** the best of our knowledge,this is the highest output power ever reported for fiber lasers at 1.2μm ***,by tuning the wavelength of the pump source,a tunable Raman output of more than 450 W over a wavelength range of 1240.6–1252.7 nm is *** work proves PDF’s advantage in high power large frequency shift Raman conversion with a cladding pump scheme,thus providing a good solution for a high power laser source at special waveband.

关键词： Phosphosilicate fiber Raman fiber laser 1.2μm waveband Wavelength tunable

Electronic structure engineering of single atomic sites by plasmoninduced hot electrons for highly efficient and selective photocatalysis

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Nano Research 2024年第8期17卷 6960-6967页

作者： xiaoya Huang Xinyuan Li Akang Chen Hongfei Gu Shouyuan Li Tailei Hou Shuwen Zhu Shuang Yu Yin Song Jiatao Zhang Beijing Key Laboratory of Construction Tailorable Advanced Functional Materials and Green Applications MIIT Key Laboratory of Medical Molecule Science and Pharmaceutical EngineeringMOE Key Laboratory of Cluster ScienceSchool of Chemistry and Chemical EngineeringSchool of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China MIIT Key Laboratory of Complex-field Intelligent Exploration School of Optics and PhotonicsBeijing Institute of TechnologyBeijing 100081China

Single atom(SA)catalysts have achieved great success on highly selective heterogeneous catalysis due to their abundant and homogeneous active *** electronic structures of these active sites,restrained by their localized coordination environments,significantly determine their catalytic performances,which are difficult to ***,we investigated the effect of localized surface plasmon resonance(LSPR)on engineering the electronic structures of single atomic ***,core–shell structures consisted of Au core and transition metal SAs loaded N-doped carbon(CN)shell were constructed,namely Au@M-SA/CN(M=Ni,Fe,and Co).It was demonstrated that plasmon-induced hot electrons originated from Au were directionally injected to the M-SAs under visible light irradiation,which significantly changed their electronic structures and meanwhile facilitated improved overall charge separation *** as-prepared Au@Ni-SA/CN exhibited highly efficient and selective photocatalytic CO_(2) reduction to CO performance,which is 20.8,17.5,and 6.9 times those of Au nanoparticles,Au@CN,and Ni-SA/CN,*** spectroscopy analysis and theoretical calculations confirmed that the plasmon enhanced Ni-SA/CN sites featured increased charge density for efficient intermediate activation,contributing to the superb photocatalytic *** work provides a new insight on plasmon and atomic site engineering for efficient and selective catalysis.

关键词： single atom catalysts plasmon enhancement coupling effect photocatalysis CO_(2) reduction

Melatonin improves synapse development by PI3K/Akt signaling in a mouse model of autism spectrum disorder

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Neural Regeneration Research 2024年第7期19卷 1618-1624页

作者： Luyi Wang Man Xu Yan Wang Feifei Wang Jing Deng xiaoya Wang Yu Zhao Ailing Liao Feng Yang Shali Wang Yingbo Li Institute of Neuroscience Department of PhysiologySchool of Basic Medical ScienceChongqing Medical UniversityChongqingChina Department of Pediatric Chongqing University Fuling HospitalChongqingChina Department of Neurosurgery Xinqiao HospitalArmy Medical UniversityChongqingChina Department of Pathology Affiliated Hospital of North Sichuan Medical CollegeNanchongSichuan ProvinceChina NHC Key Laboratory of Birth Defects and Reproductive Health Chongqing Population and Family Planning Science and Technology Research InstituteChongqingChina China National Clinical Research Center for Neurological Diseases Beijing Tiantan HospitalCapital Medical UniversityBeijingChina Advanced Innovation Center for Human Brain Protection Capital Medical UniversityBeijingChina

Autism spectrum disorders are a group of neurodevelopmental disorders involving more than 1100 genes,including Ctnnd2 as a candidate ***2knockout mice,serving as an animal model of autis m,have been demonstrated to exhibit decreased density of dendritic *** role of melatonin,as a neuro hormone capable of effectively alleviating social interaction deficits and regulating the development of dendritic spines,in Ctnnd2 deletion-induced nerve injury remains unclea *** the present study,we discove red that the deletion of exon 2 of the Ctnnd2 gene was linked to social interaction deficits,spine loss,impaired inhibitory neurons,and suppressed phosphatidylinositol-3-kinase(PI3K)/protein kinase B(Akt) signal pathway in the prefrontal *** findings demonstrated that the long-term oral administration of melatonin for 28 days effectively alleviated the aforementioned abnormalities in Ctnnd2 gene-knockout ***,the administration of melatonin in the prefro ntal cortex was found to improve synaptic function and activate the PI3K/Akt signal pathway in this *** pharmacological blockade of the PI3K/Akt signal pathway with a PI3K/Akt inhibitor,wo rtmannin,and melatonin receptor antagonists,luzindole and 4-phenyl-2-propionamidotetralin,prevented the melatonin-induced enhancement of GABAergic synaptic *** findings suggest that melatonin treatment can ameliorate GABAe rgic synaptic function by activating the PI3K/Akt signal pathway,which may contribute to the improvement of dendritic spine abnormalities in autism spectrum disorders.

关键词： autism Ctnnd2 deletion GABAergic neurons melatonin PI3K/Akt signal pathway prefrontal cortex social behavior spine density synaptic-associated proteins

Twisted Phosphors that Violate Kasha's Exciton Model in Organic Systems

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Chinese Journal of Chemistry 2024年第11期42卷 1237-1246页

作者： Boyi Fu Guangming Wang Jiuyang Li Junbo Li Xun Li xiaoya Zhao Shuhui Ding Guoping Yan Qianqian Yan Kaka Zhang School of Materials Science and Engineering Wuhan Institute of TechnologyWuhanHubei430205 China Key Laboratory of Synthetic and Self-Assembly Chemistry for Organic Functional Molecules Shanghai Institute of Organic ChemistryUniversity of Chinese Academy of SciencesChinese Academy of Sciences345 Lingling RoadShanghai200032 China

Kasha's exciton model proposes that T1 energy levels of organic compounds are insensitive to molecular aggregation and microenvironment change because of negligible small transition dipole moments of T1 *** model holds true in most organic systems till *** we report the fabrication of twisted organic phosphors with intramolecular charge transfer characters and flexible molecular *** doped into different organic matrices,the twisted phosphor adopts different conformation,exhibits distinct phosphorescence colors and T1 energy levels,which violates Kasha's exciton model in organic *** that the change of phosphorescence colors and maxima can be readily distinguished by human eyes and conventional instrument,the twisted phosphors would be exploited as a new type of molecular probe,which would exhibit potential application in optical sensing and stimuli-responsive systems.

关键词： Afterglow Twisted phosphor Triplet excited state Room-temperature phosphorescence Luminescence Spin-orbit coupling

Spectral programmable mid-infrared optical parametric oscillator

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Photonics Research 2024年第8期12卷 1593-1603页

作者： JUNRUI LIANG JIANGMING XU YANZHAO KE SICHENG LI JUNHONG HE YIDONG GUO YANG ZHANG xiaoya MA JUN YE XIAO LI JINYONG LENG PU ZHOU College of Advanced Disciplinary Studies National University of Defense TechnologyChangsha 410073China Nanhu Laser Laboratory National University of Defense TechnologyChangsha 410073China Hunan Provincial Key Laboratory of High Energy Laser Technology National University of Defense TechnologyChangsha 410073China

A spectral programmable,continuous-wave mid-infrared(MIR)optical parametric oscillator(OPO),enabled by a self-developed high-power spectral tailorable fiber laser,was proposed and *** operating at a singlewavelength,the maximum idler power reached 5.53 W at 3028 nm,with a corresponding pump-to-idler conversion efficiency of 14.7%.The wavelength number switchable output was available from one to *** single idler was tunable in a range of 528 nm(2852–3380 nm).In a dual-wavelength operation,the interval between two idlers could be flexibly tuned for 470 nm(53–523 nm),and the intensity of each channel was *** idler emission was realized,meanwhile exhibiting spectral custom-tailored ***,we balanced the parametric gain through the pre-modulating broadband multi-peak pump spectra,enabling a 10 d B bandwidth adjustment of the idler emission from 20 to 125 *** versatile mid-infrared laser,simultaneously featuring wide tuning,multi-wavelength operation,and broad bandwidth manipulation,has great application potential in composition detection,terahertz generation,and speckle-free imaging.

关键词： pump tuning parametric

Mixing states and secondary formation processes of organic nitrogen-containing single particles in Guangzhou,China

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Journal of Environmental Sciences 2024年第4期138卷 62-73页

作者： Lijun Yun Chunlei Cheng Suxia Yang Zaihua Wang Mei Li Qi En Zhong LiyuanMao Sulin Liu xiaoya Cheng Duanying Chen Fan Yang Zhen Zhou Institute of Mass Spectrometry and Atmospheric Environment Guangdong Provincial Engineering Research Center for on-line source apportionment system of air pollutionJinan UniversityGuangzhou 510632China Guangdong-Hongkong-Macao Joint Laboratory of Collaborative Innovation for Environmental Quality Guangzhou 510632China State Key Laboratory of Loess and Quaternary Geology Institute of Earth EnvironmentChinese Academy ScienceXi’an 710061China Institute for Environment and Climate Research Jinan UniversityGuangzhou 510632China Guangdong Academy of Sciences Institute of Resources Utilization and Rare Earth DevelopmentGuangzhou 510650China Environmental Monitoring Station of Pudong New District Shanghai 201200China

Organic nitrogen(ON)compounds play a significant role in the light absorption of brown carbon and the formation of organic aerosols,however,the mixing state,secondary formation processes,and influencing factors of ON compounds are still *** paper reports on the mixing state of ON-containing particles based on measurements obtained using a highperformance single particle aerosol mass spectrometer in January 2020 in *** ON-containing particles accounted for 21% of the total detected single particles,and the particle count and number fraction of the ON-containing particles were two times higher at night than during the *** prominent increase in the content of ON-containing particles with the enhancement of NO_xmainly occurred at night,and accompanied by high relative humidity and nitrate,which were associated with heterogeneous reactions between organics and gaseous NO_(x)and/or NO_(3)*** synchronous decreases in ON-containing particles and the mass absorption coefficient of water-soluble extracts at 365 nm in the afternoon may be associated with photo-bleaching of the ON species in the *** addition,the positive matrix factorization analysis found five factors dominated the formation processes of ON particles,and the nitrate factor(33%)mainly contributed to the production of ON particles at *** results of this study provide unique insights into the mixing states and secondary formation processes of the ON-containing particles.

关键词： Organic nitrogen compounds Single particles Mixing state Secondary formation Nighttime chemistry

An optimized high-throughput SARS-CoV-2 dual reporter trans-complementation system for antiviral screening in vitro and in vivo

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Virologica Sinica 2024年第3期39卷 447-458页

作者： Yingjian Li Xue Tan Jikai Deng Xuemei Liu Qianyun Liu Zhen Zhang xiaoya Huang Chao Shen Ke Xu Li Zhou Yu Chen State Key Laboratory of Virology RNA InstituteCollege of Life Sciences and Frontier Science Center for Immunology and MetabolismWuhan UniversityWuhan430072China Institute for Vaccine Research at Animal Bio-safety Level III Laboratory Wuhan University School of MedicineWuhan430071China

The severe acute respiratory syndrome coronavirus 2(SARS-CoV-2)is still epidemic around the *** manipulation of SARS-CoV-2 is restricted to biosafety level 3 laboratories(BSL-3).In this study,we developed a SARS-CoV-2ΔN-GFP-HiBiT replicon delivery particles(RDPs)encoding a dual reporter gene,GFP-HiBiT,capable of producing both GFP signal and luciferase *** optimal selection of the reporter gene,GFP-HiBiT demonstrated superior stability and convenience for antiviral ***,we established a RDP infection mouse model by delivering the N gene into K18-hACE2 KI mouse through *** mouse model supports RDP replication and can be utilized for in vivo antiviral *** summary,the RDP system serves as a valuable tool for efficient antiviral screening and studying the gene function of ***,this system can be manipulated in BSL-2 laboratories,decreasing the threshold of experimental requirements.

关键词： SARS-CoV-2 RDP Antiviral evaluation Mouse model BSL-2

Spatial Optimization Strategies for High Temperature Heat Exposure Based on Thermally Vulnerable Populations and Case Studies

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Journal of Landscape Research 2024年第2期16卷 1-5,14页

作者： XIA xiaoya YANG Xin ZHANG Qi School of Architecture and Art North China University of TechnologyBeijing 100144China View Unlimited Landscape Architecture Studio of China Urban Construction Design&Research Institute Co. Ltd.Beijing 100120China

The objective of this study is to investigate the factors that contribute to brittleness and to identify strategies for mitigating these factors in populations with varying degrees of thermal vulnerability,based on the potential impact of extreme heat exposure on human survival and *** physiological condition of lower adaptability to high temperature environments and the assessment of individuals who may have higher tolerance time in high temperature environments based on spatial perspectives suggest the need for targeted spatial optimization strategies for commuters and disadvantaged *** is demonstrated through a case *** optimization measures encompass a variety of aspects,including the integration of transportation systems,the expansion of grey space corridors,the improvement of green space layout,and the implantation of green *** study aims to reduce the exposure time of thermally vulnerable individuals to high temperature environments through spatial optimization strategies,to enhance the resilience of urban green spaces to heat stress,and to reduce the probability of heat-wave occurrence.

关键词： Thermal vulnerability Exposure High temperature environment Spatial optimization

The interactive effect of temperature and fertilizer types determines the dominant microbes in nitrous oxide emissions and the dicyandiamide efﬁcacy in a vegetable soil

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Soil Ecology Letters 2024年第3期6卷 121-133页

作者： xiaoya Xu Haiyang Liu Yaowei Liu Didier Lesueur Laetitia Herrmann Hongjie Di Caixian Tang Jianming Xu Yong Li Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment College of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China College of Geography and Environment Shandong Normal UniversityJinan 250014China Centre de Coopération Internationale en Recherche Agronomique pour le Développement(CIRAD) UMR Eco&SolsHanoiVietnam Eco&Sols Universitéde Montpellier(UMR)CIRADInstitut National de Recherche pour l’Agriculturel’Alimentation et l’Environnement(INRAE)Institut de Recherche pour le Développement(IRD)Montpellier SupAgro34060 MontpellierFrance Alliance of Biodiversity International and International Center for Tropical Agriculture(CIAT) Asia hubCommon Microbial Biotechnology Platform(CMBP)HanoiVietnam School of Life and Environmental Sciences Faculty of ScienceEngineering and Built Environment–Deakin UniversityMelbourneVIC 3125Australia Rubber Research Institute Chinese Academy of Tropical Agricultural SciencesHaikou 571737China La Trobe Institute for Sustainable Agriculture and Food Department of AnimalPlant&Soil SciencesLa Trobe UniversityBundooraVic 3086Australia

Heat waves associated with global warming and extreme climates would arouse serious consequences on nitrogen(N)***,the responses of the functional guilds to different temperatures,especially high temperature and the cascading effect on N_(2)O emissions remain *** incubation study was conducted to examine the effect of different temperatures(20°C,30°C,and 40°C)and fertilizer types(urea and manure)on N_(2)O-producers and N_(2)O-reducers,as well as the efficacy of dicyandiamide(DCD)on N_(2)O emissions in a vegetable *** showed that ammonia oxidizers and nirS-type denitrifiers were well adapted to high temperature(40°C)with manure application,while the fungal nirK-denitrifiers had better tolerance with urea *** nosZ clade I microbes had a strong adaptability to various temperatures regardless of fertilization type,while the growth of nosZ clade II group microbes in non-fertilized soil(control)were significantly inhibited at higher *** N_(2)O emissions were significantly decreased with increasing temperature and DCD application(up to 60%,even at 40°C).Under high temperature conditions,fungal denitrifiers play a significant role in N-limited soils(non-fertilized)while nirS-type denitrifiers was more important in fertilized soils in N_(2)O emissions,which should be specially targeted when mitigating N_(2)O emissions under global warming climate.

关键词： nitrogen fertilizer microorganisms nitrification inhibitor bacteria archaea fungi