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Nano Research 2024年第9期17卷 8627-8637页

作者： Shan-Fei Wang yangyang Li Haiyan Wang Jin-xia Liang chun Zhu Botao Qiao School of Chemistry and Chemical Engineering Guizhou UniversityGuiyang 550025China CAS Key Laboratory of Science and Technology on Applied Catalysis Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023China University of Chinese Academy of Sciences Beijing 100049China

Oxide-supported metal single-atom catalysts(SACs)have exhibited excellent catalytic performance for water-gas shift(WGS)***,we report the single-atom catalyst Pt1/FeOx exhibits excellent medium temperature catalytic performance for WGS reactions by the density functional theory(DFT)calculations and experimental *** calculations indicate that H_(2)O molecules are easily dissociated at oxygen vacancies,and the formed*OH and*O are adsorbed on Pt1 single atoms and the adjacent O atoms,*** studying four possible reaction mechanisms,it is found that the optimal WGS reaction pathway is proceeded along the carboxyl mechanism(pathway III),in which the formation of*COOH intermediates can promote the stability of Pt1/FeOx SAC and the easier occurrence of WGS *** energy barrier of the rate-determining step during the entire reaction cycle is only 1.16 eV,showing the high activity for the medium temperature WGS reaction on Pt1/FeOx SAC,which was verified by experimental ***,the calculated turnover frequencies(TOFs)of CO_(2)and H_(2)formation on Pt1/FeOx at 610 K(337℃)can reach up to 1.14×10^(-3)s^(-1)·site^(-1)through carboxyl *** this work,we further expand the application potential of Pt1/FeOx SAC in WGS reaction.

关键词： water-gas shift(WGS)reaction single-atom catalyst(SAC) density functional theory(DFT) thermocatalysis

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生物医药厂房结构施工安全风险管控

建筑技术开发 2024年第3期51卷 145-147页

作者：陆万柱朱朝聪陈伟夏春阳中建科技集团有限公司深圳分公司广东深圳518118

以坪山生物医药产业加速器园区项目结构施工为例,针对装配式群体结构在施工过程中主要存在的安全隐患进行了识别和判断,介绍了相应的安全管理措施和创新技术,主要包括群塔作业及各类安全防护措施。经项目实际应用,采用的管理措施和技术... 详细信息

以坪山生物医药产业加速器园区项目结构施工为例,针对装配式群体结构在施工过程中主要存在的安全隐患进行了识别和判断,介绍了相应的安全管理措施和创新技术,主要包括群塔作业及各类安全防护措施。经项目实际应用,采用的管理措施和技术手段,在满足现场安全施工的前提下,达到了节约成本的功效。在施工过程中大体量地使用装配式施工技术,实现了已使用的材料可达到多次周转使用的目的,具有绿色环保、安全可靠等特点,更好地保证了本工程施工的顺利进行,可为类似工程提供借鉴。

关键词：装配式结构风险分类安全管理与创新

Congenital leukemia: A case report and review of literature

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World Journal of Clinical Cases 2023年第29期11卷 7227-7233页

作者： chun-xia yang Ying yang Fen-Li Zhang Ding-Huan Wang Qiu-Han Bian Man Zhou Ming-xiang Zhou xiao-Yan yang Department of Pediatrics Affiliated Hospital of Guizhou Medical UniversityGuiyang 550000Guizhou ProvinceChina Clinical Medicine Guizhou Medical UniversityGuiyang 550000Guizhou ProvinceChina

BACKGROUND Acute leukemia in newborns is also known as neonatal or congenital leukemia(CL)and is a rare disease with an incidence rate of 1-5 per 1000000 live *** birth,infants with CL exhibit infiltrative cutaneous nodules,hepatosplenomegaly,thrombocytopenia,and immature leukocytes in the peripheral *** symptoms are frequently accompanied by congenital abnormalities including trisomy 21,trisomy 9,trisomy 13,or Turner *** significant advances in disease management,the survival rate is approximately 25%at 2 *** SUMMARY Here,we document a case of trisomy 21-related acute myeloid leukemia(AML)in a female *** baby was sent to the neonatal intensive care unit because of anorexia,poor responsiveness,and respiratory *** was diagnosed with AML based on bone marrow aspiration and *** sequencing identified a mutation in the GATA1 *** receiving the diagnosis,the parents decided against medical care for their child,and the baby died at home on day 9 after *** The newborn infant was diagnosed with trisomy 21-related *** sequencing identified a mutation in the GATA1 *** parents abandoned medical treatment for their infant after receiving the diagnosis,and the infant died at home on the 9th day after birth.

关键词： Congenital leukemia Trisomy 21 GATA1 Acute myeloid leukemia Literature review Case report

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

Computational Screening of Pt1@Ti_(3)C_(2)T_(2)(T=O,S)MXene Catalysts for Water-Gas Shift Reaction

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Precision Chemistry 2024年第2期2卷 70-80页

作者： yang Meng Haiyan Wang Jin-xia Liang chun Zhu Jun Li School of Chemistry and Chemical Engineering Guizhou UniversityGuiyang 550025China Department of Chemistry and Guangdong Provincial Key Laboratory of Catalytic Chemistry Southern University of Science and TechnologyShenzhen 518055China Department of Chemistry and Engineering Research Center of Advanced Rare-Earth Materials of Ministry of Education Tsinghua UniversityBeijing 100084China

Single-atom catalysts(SACs)provide an oppor-tunity to elucidate the catalytic mechanism of complex reactions in heterogeneous *** low-temperature water-gas shift(WGS)reaction is an important industrial technology to obtain high purity ***,we study the catalytic activity of Pt1@Ti_(3)C_(2)T_(2)(T=O,S)SACs,where one subsurface Ti atom with three T vacancies in the functionalized Ti_(3)C_(2)T_(2)(T=O,S)MXene is substituted by one Pt atom,for the low-temperature show that Pt1@Ti_(3)C_(2)T_(2)provides an excellent platform for the WGS reaction by its bowl-shaped vacancy derived from the Pt1 single atom and three T defects surrounding ***,Pt1@Ti_(3)C_(2)S_(2)SAC has higher catalytic performance for the WGS reaction,due to the weaker electronegativity of the S atom than the O atom,which significantly reduces the energy barrier of H*migration in the WGS reaction,which is often the rate-determining *** the most favorable redox mechanism of the WGS reaction on Pt1@Ti_(3)C_(2)S_(2),the rate-determining step is the dissociation of OH*into O*and H*with the energy barrier as low as 1.12 *** results demonstrate that Pt1@Ti_(3)C_(2)S_(2)is promising in the application of MXenes for low-temperature WGS reactions.

关键词： single-atom catalyst(SAC) density functional theory(DFT) water gas shift(WGS)reaction defective MXene thermocatalysis

Time-resolved ultra-small-angle X-ray scattering beamline(BL10U1)at SSRF

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Nuclear Science and Techniques 2024年第2期35卷 6-19页

作者： Wen-Qiang Hua chun-Ming yang Ping Zhou Feng Tian Jin-You Lin Yu-Zhu Wang xiao-Yun Li xia-Ran Miao chun-xia Hong Qiu-Shi Huang Xin-Tong Zhao Yong-Feng Men Jie Wang Xing-Yu Gao Xiu-Hong Li Shanghai Synchrotron Radiation Facility Shanghai Advanced Research InstituteChinese Academy of SciencesShanghai 201204China Key Laboratory of Advanced Micro Structural Materials MOEInstitute of Precision Optical EngineeringSchool of Physics Science and EngineeringTongji UniversityShanghai 200092China State Key Laboratory of Polymer Physics and Chemistry Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China

The construction of a new beamline,BL10U1,was completed at the Shanghai synchrotron radiation facility in *** multipurpose beamline was designed to provide X-ray scattering techniques such as ultra-small-angle X-ray scattering(USAXS),small-angle X-ray scattering(SAXS),wide-angle X-ray scattering,and microfocus SAXS(μSAXS)for a broad user *** realize fast time-resolved USAXS experiments,the beamline adopted an in-vacuum undulator with a total length of 1.6 m as the photon *** in-house cryogenic-cooled double multilayer monochromator was installed to deliver a photon flux of approximately 10^(13) photons/s at a photon energy of 10 *** three-year successful operation of this beamline demonstrated that the monochromator operated smoothly,as ***10U1 has three end stations in succession:USAXS end station,μSAXS end station,and end station for industrial *** minimum scattering vector q~0.0042 nm^(-1) at 10 keV can be achieved at the USAXS end station equipped with a 28 m-long and 1.8 m-diameter vacuum flight *** theμSAXS end station,a beam spot of less than 10×8μm was achieved for micro-SAXS *** contrast,in situ experimental instruments up to 5 m high and 8 m wide can be mounted at the industrial application end station,which offers industrial scientists the opportunity to use their large industrial ***10U1 opens up a new capability to investigate phenomena such as non-equilibrium and dynamic processes of materials with a wide length scale from angstroms to micrometers with millisecond time *** this paper,we also report beamline design considerations and commissioning results.

关键词： Synchrotron radiation Ultra-small-angle X-ray scattering Micro small-angle X-ray scattering USAXS Time resolved μSAXS

Preparation of nano-TiO_2 photocatalysts and their decomposition activity in phenol-contaminated water

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Journal of Zhejiang University-Science A(Applied Physics & Engineering) 2009年第11期10卷 1651-1659页

作者： xiao-yuan JIANG Feng DU chun-xia GUO Qiong yang xiao-ming ZHENG Institute of Catalysis Faculty of Science Zhejiang University Hangzhou 310028 China

TiO2 was prepared by the hydrolyzation method in (NH4)2SO4-modified TiCl4 solution, and TiO2 photocatalysts were obtained by accelerating the precipitation of TiO2 powder in a high-temperature water bath. The photocatalysts were characterized by Brunauer-Emmett-Teller (BET), X-ray diffraction (XRD), Raman spectrum and UV-Vis (Ultraviolet-Visible) spectrometry techniques, and the photocatalytic activity in phenol-contaminated water was investigated. The results showed that photocatalysts calcined at 400 °C had a specific surface area of 138.2 m2/g and an average particle size of 9 nm, and a significant increase in thermal stability of anatase phase. At the calcination temperature of 700 °C, the crystal form of TiO2 started to change into rutile (anatase: 97%, rutile: 3%). The activity of TiO2 photocatalysts prepared with (NH4)2SO4-modified TiCl4 solution was markedly stronger than that without (NH4)2SO4-modified TiCl4 solution. Maximal photocatalytic activity was observed at the mole ratio of Ti:(NH4)2SO4=1:2, the water-bath temperature of 90 °C and the calcination temperature of 700 °C.

关键词：纳米二氧化钛光催化剂酚污染分解活性水解光催化活性焙烧温度制备二氧化钛粉末

Electroacupuncture at Sensitized Acupoints Relieves Somatic Referred Pain in Colitis Rats by Inhibiting Sympathetic-Sensory Coupling to Interferewith 5-HT Signaling Pathway

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Chinese Journal of Integrative Medicine 2024年第2期30卷 152-162页

作者： yang Ying QU Jin-yu GUO Hua ZHOU Hai-ying RUAN xia PENG Ying-chun SHEN Xue-fang XIONG Jin WANG Yi-li School of Clinical Medicine Chengdu Medical CollegeChengdu(610500)China Department of Rehabilitation Medicine the First Affliated Hospital of Chengdu Medical CollegeChengdu(610500)China Department of Rehabilitation Medicine West China HospitalSichuan University/West China School of NursingSichuan UniversityChengdu(610041)China Department of Neurology the First Affiliated Hospital of Chengdu Medical CollegeChengdu(610500)China

Objective:To investigate whether electroacupuncture(EA) at sensitized acupoints could reduce sympathetic-sensory coupling(SSC) and neurogenic inflammatory response by interfering with 5-hydroxytryptamine(5-HT)ergic neural pathways to relieve colitis and somatic referred pain,and explore the underlying ***:Rats were treated with 5% dextran sodium sulfate(DSS) solution for 7 days to establish a colitis *** rats were randomly divided into the control and model groups according to a random number table(n=6).According to the Research on Rat Acupoint Atlas",sensitized acupoints and non-sensitized acupoints were *** were randomly divided into the control,model,Zusanli-EA(ST 36),Dachangshu-EA(BL 25),and Xinshu(BL 15) groups(n=6),as well as the control,model,EA,and EA+GR113808(a 5-HT inhibitor)groups(n=6).The rats in the control group received no *** was administered on 2 days after modeling using the stimulation pavameters:1 mA,2 Hz,for 30 min,with sparse and dense waves,for 14 consecutive ***113808 was injected into the tail vein at 5 mg/kg before EA for 10 min for 7 consecutive *** sensitivity was assessed with von Frey *** weight and disease activity index(DAI) scores of rats were *** and eosin staining was performed to observe colon *** was analyzed by immunofluorescence *** staining was performed to detect 5-HT and substance P(SP) *** calcitonin gene-related peptide(CGRP) in skin tissue and tyrosine hydroxylase(TH) protein levels in DRG were detected by Western *** levels of hyaluronic acid(HA),bradykinin(BK),prostaglandin I2(PGI2) in skin tissue,5-HT,tryptophan hydroxylase 1(TPH1),serotonin transporters(SERT),5-HT 3 receptor(5-HT3R),and 5-HT 4 receptor(5-HT4R) in colon tissue were measured by enzyme-linked immunosorbent assay(ELISA).Results:BL 25 and ST 36 acupoints were determined as sensitized acupoints,and BL 1

关键词： electroacupuncture sensitized acupoints sympathetic-sensory coupling 5-hydroxytryptamine neurogenic inflammation somaticreferredpain

Two gene clusters and their positive regulator SlMYB13 that have undergone domestication-associated negative selection control phenolamide accumulation and drought tolerance in tomato

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Molecular Plant 2024年第4期17卷 579-597页

作者： Peng Cao Jun yang Linghao xia Zhonghui Zhang Zeyong Wu Yingchen Hao Penghui Liu Chao Wang chun Li Jie yang Jun Lai xianggui Li Meng Deng Shouchuang Wang School of Breeding and Multiplication(Sanya Institute of Breeding and Multiplication) Hainan UniversitySanya 572025China College of Tropical Agriculture and Forestry Hainan UniversityHaikou 572208China Collaborative Innovation Center of Nanfan and High-Efficiency Tropical Agriculture Hainan UniversityHaikou 572208China

Among plant metabolites,phenolamides,which are conjugates of hydroxycinnamic acid derivatives and polyamines,play important roles in plant adaptation to abiotic and biotic ***,the molecular mechanisms underlying phenolamide metabolism and regulation as well as the effects of domestication and breeding on phenolamide diversity in tomato remain largely *** this study,we performed a metabolite-based genome-wide association study and identified two biosynthetic gene clusters(BGC7 and BGC11)containing 12 genes involved in phenolamide metabolism,including four biosynthesis genes(two 4CL genes,one C3H gene,and one CPA gene),seven decoration genes(five AT genes and two UGT genes),and one transport protein gene(DTX29).Using gene co-expression network analysis we further discovered that SlMYB13 positively regulates the expression of two gene clusters,thereby promoting phenolamide *** and physiological analyses showed that BGC7,BGC11 and SlMYB13 enhance drought tolerance by enhancing scavenging of reactive oxygen species and increasing abscisic acid content in *** variation analysis suggested that BGC7,BGC11 and SlMYB13 were negatively selected during tomato domestication and improvement,leading to reduced phenolamide content and drought tolerance of cultivated ***,our study discovers a key mechanism of phenolamide biosynthesis and regulation in tomato and reveals that crop domestication and improvement shapes metabolic diversity to affect plant environmental adaptation.

关键词： tomato phenolamides gene cluster drought tolerance natural variation evolution

Cost-benefit analysis of esophageal cancer endoscopic screening in high-risk areas of China

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World Journal of Gastroenterology 2012年第20期18卷 2493-2501页

作者： Juan yang wen-Qiang wei Jin Niu Zhi-Cai Liu chun-xia yang You-Lin Qiao Department of Epidemiology West China School of Public Health Sichuan University Chengdu 610041 Sichuan Province China Department of Epidemiology Cancer Institute and Hospital Chinese Academy of Medical Sciences and Peking Union Medical College Beijing 100021 China Department of Thoracic-Surgery Linzhou Cancer Institute Linzhou 456550 Henan Province China

AIM:To estimate the cost-benefit of endoscopic screening strategies of esophageal cancer(EC)in high-risk areas of China. METHODS:Markov model-based analyses were conducted to compare the net present values(NPVs)and the benefit-cost ratios(BCRs)of 12 EC endoscopic screening *** varied according to the targeted screening age,screening frequencies,and follow-up *** parameters were collected from population-based studies in China,published literatures,and surveillance data. RESULTS:Compared with non-screening outcomes,all strategies with hypothetical 100 000 subjects saved life *** five dominant strategies determined by the incremental cost-effectiveness analysis,screening once at age 50 years incurred the lowest NPV(international dollar-I$55 million)and BCR(2.52).Screening six times between 40-70 years at a 5-year interval[i.e., six times(40)f-strategy]yielded the highest NPV(I$99 million)and BCR(3.06).Compared with six times(40)fstrategy,screening thrice between 40-70 years at a 10-year interval resulted in relatively lower NPV,but the same BCR. CONCLUSION:EC endoscopic screening is cost-beneficial in high-risk areas of ***-makers should consider the cost-benefit,population acceptance,and local economic status when choosing suitable screening strategies.

关键词：成本效益分析食管癌中国内镜风险检查时间间隔净现值