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Electronic structure regulation and built-in electric field synergistically strengthen photocatalytic nitrogen fixation performance on Ti-BiOBr/TiO_(2)heterostructure

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Rare Metals 2024年第3期43卷 1125-1138页

作者： Ru-Qi Li Yu-Jie Bian Chun-Ming Yang Li Guo tao-xia Ma Chuan-tao Wang Feng Fu Dan-Jun Wang College of Chemistry and Chemical Engineering Yan’an UniversityYan’an Key Laboratory of Green Catalysis and Quality Improvement and Utilization of Low Rank CoalYan’an716000China

At present,industrial synthetic ammonia was still obtained through the Hubble-Bosch process,with large energy *** is a research hotspot to realize green synthetic ammonia by using solar *** difficulty of photocatalytic ammonia synthesis was that the photo-excited electrons have not enough energy to active N≡*** this study,Ti was doped into BiOBr by one-step hydrothermal method,which was oxidized into TiO_(2)when the doping amount reaches the maximum,in situ forming Ti_(0.31)B_(0.69)OB/TiO_(2)*** from the synergistic effect of Ti doping and S-scheme heterojunction,the synthetic ammonia efficiency of Ti_(0.31)B_(0.69)OB/TiO_(2)-11.96 reached 1.643 mmol·g_(cat)^(-1)at mild conditions and without hole scavenger for up to 7 h,the efficiency of synthetic ammonia is 115 times,10.5 times and 3.3 times of that of BiOBr,Ti_(0.31)B_(0.69)OB and TiO_(2),***,DFT calculation confirms that Ti doping accurately refine the electronic structure of BiOBr,facilitate nitrogen adsorption activation and reduce hydrogenation reaction energy barrier,thus accelerating the reaction kinetics of photocatalytic nitrogen reduction(NRR),Meanwhile,constructing S-scheme heterojunction boosts the separation and transfer of photogenerated electron-hole pairs,improving the reduction ability of electrons in the conduction band of TiO_(2)and the oxidation ability of holes in the valence band of Ti_(0.31)B_(0.69)OB.

关键词： S-scheme heterostructure Electronic structure regulation Built-in electric field Synergistical stren4gthening Photocatalytic nitrogen fixation

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Defect-manipulated magnetoresistance and above-room-temperature ferromagnetism in two-dimensional BaNi_(2)V_(2)O_(8)

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Chinese Chemical Letters 2024年第3期35卷 523-527页

作者： Pengfei Tan Chuanhui Zhu Jinjin Yang Shuang Zhao tao xia Mei-Huan Zhao tao Han Zheng Deng Man-Rong Li Key Laboratory of Bioinorganic and Synthetic Chemistry of Ministry of Education School of ChemistrySun Yat-sen UniversityGuangzhou 510006China School of Science and Engineering The Chinese University of Hong KongShenzhen 518172China Institute of Physics Chinese Academy of SciencesBeijing 100190China School of Science Hainan UniversityHaikou 570228China

The intricate correlation between multiple degrees of freedom and physical properties is a fascinating area in solid state chemistry and condensed matter ***,we report a quantum-magnetic system BaNi_(2)V_(2)O_(8)(BNVO),in which the spin correlation was modulated by unusual oxidation state,leading to different magnetic *** BNVO was modified with topochemical reduction(TR)to yield TR-BNVO with partially reduced valance state of Ni^(+)in the two-dimensional NiO_(6)-honeycomb ***,the antiferromagnetic order is suppressed by the introduction of locally interposed Ni^(+)and oxygen vacancies,resulting in a ferromagnetic ground state with the transition temperature up to 710 K.A positive magnetoresistance(7.5%)was observed in the TR-BNVO at 40 K under 7 *** findings show that topological reduction is a powerful approach to engineer low-dimensional materials and accelerate the discovery of new quantum magnetism.

关键词： Layered honeycomb oxide Topochemical reduction Oxygen vacancies Ferromagnetism Magnetoresistance

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Duplicated chalcone synthase(CHS)genes modulate flavonoid production in tea plants in response to light stress

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Journal of Integrative Agriculture 2024年第6期23卷 1940-1955页

作者： Mingzhuo Li Wenzhao Wang Yeru Wang Lili Guo Yajun Liu xiaolan Jiang Liping Gao tao xia State Key Laboratory of Tea Plant Biochemistry and Utilization Anhui Agricultural UniversityHefei 230036China School of Life Sciences Anhui Agricultural UniversityHefei 230036China College of Horticulture Northwest A&F UniversityYangling 712100China Department of Plant and Microbial Biology North Carolina State UniversityRaleigh 27606NCUSA

In tea plants,the abundant flavonoid compounds are responsible for the health benefits for the human body and define the astringent flavor *** the downstream mechanisms of flavonoid biosynthesis have been extensively studied,the role of chalcone synthase(CHS)in this secondary metabolic process in tea plants remains less *** this study,we compared the evolutionary profile of the flavonoid metabolism pathway and discovered that gene duplication of CHS occurred in tea *** identified three CsCHS genes,along with a CsCHS-like gene,as potential candidates for further functional *** the CsCHS-like gene,the CsCHS genes effectively restored flavonoid production in Arabidopsis ***,CsCHS transgenic tobacco plants exhibited higher flavonoid compound accumulation compared to their wild-type *** notably,our examination of promoter and gene expression levels for the selected CHS genes revealed distinct responses to UV-B stress in tea *** findings suggest that environmental factors such as UV-B exposure could have been the key drivers behind the gene duplication events in CHS.

关键词： tea flavonoids biosynthesis CHS gene duplication UV-B stress

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Camellia sinensis CsMYB4a participates in regulation of stamen growth by interaction with auxin signaling transduction repressor CsAUX/IAA4

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The Crop Journal 2024年第1期12卷 188-201页

作者： Guoliang Ma Mingzhuo Li Yingling Wu Changjuan Jiang Yifan Chen Dawei Xing Yue Zhao Yajun Liu xiaolan Jiang tao xia Liping Gao School of Life Science Anhui Agricultural UniversityHefei 230036AnhuiChina Plant for Human Health Institute Department of Plant and Microbial BiologyNorth Carolina State UniversityKannapolisNC 28081USA State Key Laboratory of Tea Plant Biology and Utilization/Key Laboratory of Tea Biology and Tea Processing of Ministry of Agriculture/Anhui Provincial Laboratory of Tea Plant Biology and Utilization Anhui Agricultural UniversityHefei 230036AnhuiChina

Subgroup 4(Sg4)members of the R2R3-MYB are generally known as negative regulators of the phenylpropanoid pathway in *** previous research showed that a R2R3-MYB Sg4 member from Camellia sinensis(CsMYB4a)inhibits expression of some genes in the phenylpropanoid pathway,but its physiological function in the tea plant remained ***,CsMYB4a was found to be highly expressed in anther and filaments,and participated in regulating filament *** analysis and exogenous auxin treatment showed that the target of CsMYB4a might be the auxin signal ***/indole-3-acetic acid 4(AUX/IAA4),a repressor in auxin signal transduction,was detected from a yeast two-hybrid screen using CsMYB4a as *** silencing assays showed that both CsIAA4 and CsMYB4a regulate filament *** plants overexpressing CsIAA4 were insensitive to exogenous a-NAA,consistent with overexpression of ***-protein interaction experiments revealed that CsMYB4a interacts with N-terminal of CsIAA4 to prevent CsIAA4 *** out of the endogenous NtIAA4 gene,a CsIAA4 homolog,in tobacco alleviated filament growth inhibition and a-NAA insensitivity in plants overexpressing *** results strongly suggest that CsMYB4a works synergistically with CsIAA4 and participates in regulation of the auxin pathway in stamen.

关键词： AUX/IAA4 Auxin signaling CsMYB4a Subgroup 4 R2R3-MYB

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Correlation between genotypes of Orientia tsutsugamushi and clinical characteristics of patients with scrub typhus in Guangzhou,China

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Asian Pacific Journal of Tropical Medicine 2024年第7期17卷 299-309,I0008,I0009页

作者： Jiali Long Ziyi Zeng Haiyan Chen xia tao Xinwei Wu Shouyi Chen Liqun Fang Xiuqing Zhang Jianxiong Xu Lin Zhang Yuehong Wei Guangzhou Center for Disease Control and Prevention GuangzhouChina Institute of Public Health Guangzhou Medical UniversityGuangzhouChina Outpatient department of Baogang the First Affiliated Hospital of Guangdong Pharmaceutical UniversityGuangzhouChina State Key Laboratory of Pathogen and Biosecurity Beijing Institute of Microbiology and EpidemiologyBeijingChina Guangzhou Institute of Biomedicine and Health Chinese Academy of SciencesGuangzhouChina

Objective:To explore the correlation between genotypes of Orientia(O.)tsutsugamushi and clinical characteristics of scrub typhus ***:Clinical data of patients with scrub typhus admitted to different types of medical institutions in Guangzhou from September 2012 to December 2016 were collected using medical *** data,clinical manifestations,as well as hematological and biochemical indicators of patients infected with different genotypes were analyzed and ***:A total of 192 patients were included in this study,including 121 patients with Karp genotype of *** infection(63.0%),36 patients with Gilliam genotype(19.0%),23 patients with Kato genotype(12.0%),and 12 patients with TA763 genotype(6.0%)*** median value of albumin in patients with Karp genotype infection was significantly lower than that of Gilliam-infected patients(P=0.032).Patients with Karp genotype infection had a significantly longer hospital stay(9 days)than those with Gilliam genotype(7 days)(P=0.009)and Kato genotype infection(6 days)(P=0.005).Karp-infected patients also represented for the largest number of patients with complicated organ involvement(88/133,66.2%).Furthermore,Karp-infected patients had higher risk of developing multiple organ dysfunction syndrome(18.2%)and requiring intensive care unit treatment(15.9%).Besides,patients with Gilliam genotype(8 days)and TA763 genotype infection(7.5 days)had shorter fever duration than those with Karp genotype(9 days)and Kato genotype(9 days)infection,***:Genotypes of Orientia tsutsugamushi were associated with varying clinical manifestations,organ involvement,and treatment outcomes,suggesting that genotypes ranged in virulence.

关键词： Scrub typhus Orientia tsutsugamushi Genotype Clinical characteristics

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汉晋时期西南夷的祖源书写与文化认同

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中华文化论坛 2024年第1期 111-123页

作者：朱韬夏涛东北师范大学历史文化学院吉林长春130024 新疆社会科学院社会学研究所新疆乌鲁木齐830011

汉晋时期,祖源的“记忆—叙事—书写”演进构成华夏与西南夷族群产生文化认同的重要前提。滇、夜郎、哀牢族群的祖源书写在形式上体现出由“神话”到“史传”的历时演进,在内容上体现出由“我者”到“他者”的认知转移。其中,滇人祖源... 详细信息

汉晋时期,祖源的“记忆—叙事—书写”演进构成华夏与西南夷族群产生文化认同的重要前提。滇、夜郎、哀牢族群的祖源书写在形式上体现出由“神话”到“史传”的历时演进,在内容上体现出由“我者”到“他者”的认知转移。其中,滇人祖源书写以“史传”的形式展开,主要体现华夏“他者”认知;夜郎祖源书写以“神话+史传”的形式展开,分别对应夜郎“我者”认知与华夏“他者”认知的演进;哀牢祖源书写主要以“神话”的形式展开,对应哀牢“我者”认知与华夏“他者”认知的演进。若将西南夷祖源叙事纳入汉晋以来的知识建构背景考量,则从叙事母体、叙事图腾、叙事要素三方面显示出融合泛化的迹象。西南夷祖源书写的文化认同导致的角色反差,体现了汉晋时期“以夏变夷”与“夷夏之防”的观念调适,是华夏“大传统”对西南夷“小传统”的打破,也是西南夷“小传统”对华夏“大传统”的内化调适,共同构成铸造中华民族共同体的西南语境。

关键词：西南夷祖源书写文化认同中华民族共同体

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医疗保险对相对贫困的缓解效应——基于CFPS四期数据

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吉首大学学报（社会科学版） 2024年第1期45卷 116-129页

作者：李琼夏涛吉首大学商学院湖南吉首416000

运用中国家庭追踪调查(CFPS)2012、2014、2016和2018年的四期数据对相对贫困的医疗保险缓解效应进行实证研究,结果证实,医疗保险能有效缓解居民的相对贫困。在设定家庭人均收入中位数的40%、50%和60%三条相对贫困线下,参加医疗保险能使... 详细信息

运用中国家庭追踪调查(CFPS)2012、2014、2016和2018年的四期数据对相对贫困的医疗保险缓解效应进行实证研究,结果证实,医疗保险能有效缓解居民的相对贫困。在设定家庭人均收入中位数的40%、50%和60%三条相对贫困线下,参加医疗保险能使居民陷入相对贫困的概率分别下降3.9%、4.6%和4.8%。医疗保险缓解相对贫困效应呈异质性特征,东部地区弱于中、西部地区,农村强于城市,中老年群体强于青年群体。机制分析发现,居民通过参加医疗保险来改善健康状况、增加非医疗消费支出,从而降低陷入相对贫困的风险,而居民良好的受教育状况能进一步强化医疗保险对相对贫困的缓解效应。为充分发挥医疗保险缓解居民相对贫困的效应,须进一步加大公共财政对医疗保险的支持力度,加快实施医疗保险基金全国统筹机制,积极推进“健康中国”战略和医疗保险制度“适老化”改革。

关键词：医疗保险相对贫困中国家庭追踪调查(CFPS) “适老化”改革

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心理学研究中预注册的现状、挑战与建议

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心理科学进展 2024年第5期32卷 715-727页

作者：赵加伟夏涛胡传鹏北京师范大学认知神经科学与学习国家重点实验室北京100875 中国人民大学统计学院北京100872 香港大学心理学系中国香港999077 南京师范大学心理学院南京210024

心理学研究者采用预注册的新型研究实践以应对出版偏倚等问题,包括未经同行评审的预注册、经过同行评审的注册报告和注册重复报告。诸多主流国际期刊采纳了注册报告,预注册平台和模板也趋于成熟。但预注册和注册报告也存在争议,为检验... 详细信息

心理学研究者采用预注册的新型研究实践以应对出版偏倚等问题,包括未经同行评审的预注册、经过同行评审的注册报告和注册重复报告。诸多主流国际期刊采纳了注册报告,预注册平台和模板也趋于成熟。但预注册和注册报告也存在争议,为检验其效果,研究者对预注册与注册报告进行了元研究,结果发现注册报告有助于解决出版偏倚和提升研究整体质量;而未经同行评审的预注册则达不到类似的效果。采纳预注册与注册报告,提高研究的可重复性、开放性与严谨性,需要研究人员、学术机构与出版机构的共同努力。

关键词：预注册注册报告注册重复报告可重复性开放科学

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1000MW发电机出口半绝缘电压互感器交流耐压试验方法研究

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电气开关 2024年第1期62卷 90-92,97页

作者：陶霞江西大唐国际抚州发电有限责任公司江西抚州344128

对1000MW火力发电机组的发电机出口浇筑型电磁式电压互感器(简称PT)进行交流耐压试验时,因为PT变比较大且单个二次绕组对一次绕组、其他二次绕组及地的电容较大,如果采用传统的三倍频感应耐压试验,其二次绕组很容易过载,解决办法有两个... 详细信息

对1000MW火力发电机组的发电机出口浇筑型电磁式电压互感器(简称PT)进行交流耐压试验时,因为PT变比较大且单个二次绕组对一次绕组、其他二次绕组及地的电容较大,如果采用传统的三倍频感应耐压试验,其二次绕组很容易过载,解决办法有两个:其一可以采用电抗器并联补偿的方式减少流过二次绕组的电流;其二采用串联谐振装置直接从一次侧加压。

关键词：半绝缘浇筑型电磁式三倍频感应耐压串联谐振

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浅析淠河总干渠水生态综合治理工程三期设计的成效

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建筑与装饰 2024年第7期 17-19页

作者：夏涛安徽省淠史杭灌区管理总局安徽六安 237000

河流是我国水生生态系统的重要组成部分,但近年来,由于人类的随意开发建设,河流发生了严重的水土流失,河流的断面也在减少.如果河流生态环境遭到破坏,生物链系统就会失衡,水污染随之而来,对我国生态水利保护的可持续发展是不利的.因此,... 详细信息

河流是我国水生生态系统的重要组成部分,但近年来,由于人类的随意开发建设,河流发生了严重的水土流失,河流的断面也在减少.如果河流生态环境遭到破坏,生物链系统就会失衡,水污染随之而来,对我国生态水利保护的可持续发展是不利的.因此,应加快河流生态治理,改善河流功能,增强其防洪能力,为保护生态水利创造有利条件.本文通过水生态治理工程设计实例,总结设计经验,提升水生态环境.

关键词：水生态综合治理河道治理

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