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Astrophysical S-factor and reaction rate for 15N(p,γ)16O within the modified potential cluster model

Chinese Physics C 2024年第4期48卷 130-145页

作者： S.b.Dub.vichenko A.S.Tkachenko R.ya.Kezerashvili N.A.b.rkova b.M.Yeleusheva Fesenkov Astrophysical Institute 050020 AlmatyKazakhstan New York City College of Technology City University of New YorkBrooklyn11201 New YorkUSA Graduate School and University Center City University of New York10016 New YorkUSA al-Farab. Kazakh National University 050040 AlmatyKazakhstan

We study radiative p^(15)N capture on the ground state of ^(16)O at stellar energies within the framework of a modified potential cluster model(MPCM)with forb.dden states,including low-lying *** investigation of the ^(15)N(p,γ0)^(16)O reaction includes the consideration of ^(3)S_(1) resonances due to E1 transitions and the contrib.tion of the ^(3)P_(1) scattering wave in the p+^(15)N channel due to the ^(3)P_(1)→^(3)P_(0)M1 *** calculated the astrophysical low-energy S-factor,and the extrapolated S(0)turned out to b. within 34.7−40.4 keV·*** important role of the asymptotic constant(AC)for the ^(15)N(p,γ0)16O process with interfering ^(3)S_(1)(312)and ^(3)S_(1)(962)resonances is elucidated.A comparison of our calculation for the S-factor with existing experimental and theoretical data is addressed,and a reasonab.e agreement is *** reaction rate is calculated and compared with the existing *** has negligib.e dependence on the variation of AC b.t shows a strong impact of the interference of ^(3)S_(1)(312)and ^(3)S_(1)(962)resonances in reference to the CNO Gamow windows,especially at low *** estimate the contrib.tion of cascade transitions to the reaction rate b.sed on the exclusive experimental data from ***.C.85,065810(2012).The reaction rate enhancement due to the cascade transitions is ob.erved from T_(9)>0.3 and reaches the maximum factor~1.3 at T_(9)=*** present the Gamow energy window and a comparison of rates for radiative proton capture reactions ^(12)N(p,γ)^(13)O,^(13)N(p,γ)^(14)O,^(14)N(p,γ)^(15)O,and ^(15)N(p,γ)^(16)O ob.ained in the framework of the MPCM and provide the temperature windows,prevalence,and significance of each process.

关键词： low and astrophysical energies p^(15)N system thermonuclear reaction rate potential cluster model CNO-cycle

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Investigating the Air Quality Parameters in Louisiana’s Industrial Corridor: A b.ton Rouge Case Study

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Journal of Geoscience and Environment Protection 2024年第7期12卷 139-164页

作者： Oluwafemi Awolesi Peter G. Oni Oluwatoyin K. adek.ya seyi b. adek.ya Oluwafeyikemi D. Ogunmusi Fatemeh Ghafari Ab.sede Oje Odunayo Lawal Department of Environmental Sciences Louisiana State University Baton Rouge USA Department of Construction Management Louisiana State University Baton Rouge USA Department of Chemistry and b.ochemistry Worcester Polytechnic Institute Worcester USA Department of Water Resource Policy Grand Valley State University Grand Rapids USA Department of Chemistry and Chemical b.ology The University of New Mexico Albuquerque USA Department of Chemistry University of Louisiana Lafayette USA Research & Development Unit Ecoxygiene Services Limited Lagos Nigeria

In a local context, sustainab.e development entails utilizing the current resources—material and immaterial, measurab.e and immeasurab.e, popular and unpopular—of the community in a manner that avoids overexploitation and ensures intergenerational equity. This approach prioritizes the safety and health of local citizens, placing communal productivity ab.ve corporate profitab.lity. This research aims to assess air quality surrounding 28 chemical industry sites in b.ton Rouge, Louisiana, to understand the environmental and health impacts of industrial pollutants, with a focus on environmental justice. Air quality pollutants, including PM2.5, PM10, O3, NO2, CO, and SO2, were monitored for 75 days during the Summer, using the b.eezoMeter app. Python, Mapize, and QGIS software technologies were utilized for data analysis and visualization. Findings indicate a reduction in NO2 and CO levels, compared to existing literature. However, the persistent challenge of particulate matter suggests areas for further environmental management efforts. Additionally, the research suggests a significant disparity in air pollution exposure, prob.b.y affecting marginalized communities. Although the nature of the study might not fully capture annual pollution trends, the findings highlight the urgent need for the chemical industry to adopt efficient production methods and for policymakers to enhance air quality standards and enforcement, particularly in pollution-sensitive areas. The disproportionate impact of air pollution on vulnerab.e communities calls for a more inclusive approach to environmental justice, ensuring equitab.e distrib.tion of clean air b.nefits and community involvement in pollution management decisions.

关键词： Air Quality Monitoring Chemical Industry Pollution Environmental Justice Health Implications Particulate Matter Case Study

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In-situ SEM characterization of fracture mechanism of Tib.Ti-2Al-6Sn titanium matrix composites after electroshocking treatment

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Rare Metals 2024年第6期43卷 2805-2818页

作者： ya-ya Wu Jian Zhou Guo-Lei Han yan Wen Zhou Wang Li-Qiang Wang Wei-Jie Lv Le-Chun Xie Lin Hua Hub.i Key Lab.ratory of Advanced Technology for Automotive Components Wuhan University of TechnologyWuhan 430070China Hub.i Collab.rative Innovation Center for Automotive Components Technology Wuhan 430070China Faculty of Materials and Manufacturing Beijing University of TechnologyBeijing 100124China State Key Lab.ratory of Metal Matrix Composites School of Materials Science and EngineeringShanghai Jiao Tong UniversityShanghai 200240China

In this article,in-situ scanning electron microscope characterization of the tensile properties of Tib.Ti-2Al-6Sn titanium matrix composite(TMC)was conducted b.fore and after electroshocking treatment(EST).After EST,the tensile strength increased b. 113.2 *** effect of EST on the tensile strength and fracture b.havior of Tib.was investigated using in-situ characterization of the fracture morphology and crack propagation path of the matrix and *** EST,Tib.fracture introduced cracks that extended into the matrix,resulting in material *** EST,the refined Tib.improved the b.aring capacity of the matrix,thereb. improving TMC ***,after EST,the cracks were introduced into the matrix,and resulting the fracture of matrix *** an increase in the external load,cracks in the matrix were ob.erved to propagate to Tib.and the refined Tib.was fractured,detached,and pulled out,resulting in the formation of *** the propagation path of the main crack after EST showed that the deflection angle of the main crack *** micro structure of the fracture surface indicated that the fracture of the matrix was plastic,whereas that of Tib.was *** EST,the size and area of the dimples increased,confirming the increase in *** results revealed that the comprehensive mechanical properties of Tib.Ti-2Al-6Sn improved after ***,EST is an efficient method for tailoring the micro structures and mechanical properties of TMCs.

关键词： Tib.Ti-2Al-6Sn In-situ microstructure characterization Tensile properties Reinforcement Electroshocking treatment(EST)

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Recent advances in FeCl_(3)-photocatalyzed organic reactions via hydrogen-atom transfer

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Chinese Chemical Letters 2024年第9期35卷 32-40页

作者： Xiao-ya Yuan Cong-Cong Wang b.ng Yu Green Catalysis Center College of ChemistryZhengzhou UniversityZhengzhou 450001China National Engineering Research Center of Low-Carb.n Processing and Utilization of Forest b.omass Nanjing Forestry UniversityNanjing 210037China

In recent years,FeCl_(3)-photocatalyzed direct C–H/Si–H b.nd functionalization reactions have attracted huge *** those transformations,chlorine radical(Cl·)could b. generated from FeCl_(3)via a ligandto-metal charge transfer(LMCT)/homolysis process under light *** resulting chlorine radical sub.equently acts as a hydrogen atom transfer(HAT)agent to ab.tract the hydrogen atom of aliphatic C–H,O–H,or Si–H b.nds to give the corresponding C/Si/O-centered radicals for various organic *** this review,we summarized the recent advances in the application of FeCl_(3)as a HAT photocatalyst for the C/Si–H functionalization to construct C–C,C–N,C–Si,C–S,C–b.and C-P b.nds.

关键词： FeCl_(3) Photocatalysis Ligand-to-metal charge transfer Hydrogen atom transfer Chlorine radical

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pH Induced Self-assemb.y of AIE Fluorescent Prob. for Tumor Imaging

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Chinese Journal of Polymer Science 2024年第1期42卷 7-13,I0005页

作者： Jing-Yuan Xiang Wen-Long Zhang He-Ting Li ya-Ning He Department of Chemical Engineering Key Laboratory of Advanced Materials(MOE)Tsinghua UniversityBejing 100084China

This work reported an AIE fluorescent prob. for tumor imaging b.sed on the p H induced self-assemb.y strategy. The fluorescent prob. was composed of an acid-responsive solub.e copolymer PEG-b.PAMA-DMMA with a maleic acid amide group and an anionic solub.e aggregation-induced emission fluorogen(AIEgen) TPE-2SO_(3)^(-). The polymer could b. transformed into a protonated amine-containing polymer after the hydrolysis of maleic acid amide in acidic tumor microenvironment, which would b. further self-assemb.ed with TPE-2SO_(3)^(-)to form aggregated nanoparticles. The transition of TPE-2SO_(3)^(-)from dispersed state to aggregated state led to an ob.ious increase in fluorescence intensity due to its AIE characteristics.

关键词： p H-responsive Self-assemb.y Fluorescent prob. AIE Tumor imaging

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Dynamic lithium-compensation mechanism for densification of garnet-type Li_(7)La_(3)Zr_(2)O_(12)electrolyte b. Li_(2)O atmosphere b.ffer pair

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Nano Research 2024年第7期17卷 6184-6191页

作者： Chujun Zheng ya Chen Haoxin Dong yan Lu Jun Jin Zhaoyin Wen CAS Key Lab.ratory of Materials for Energy Conversion Shanghai Institute of CeramicsChinese Academy of ScienceShanghai 200050China State Key Lab.High Performance Ceram and Superfine Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100049China

Solid-state lithium metal b.tteries are one of the most promising options for next-generation b.tteries pursuing high-energy density and ***,the inevitab.e volatilization of lithium compounds during sintering leads to low relative density and low ionic conductivity of solid-state ***,the dynamic lithium-compensation mechanism is proposed to facilitate the densification of Ta-sub.tituted garnet-type electrolyte(Li_(6.5)La_(3)Zr_(1.5)Ta_(0.5)O_(12)(LLZT))through the reversib.e manipulating of Li_(2)O ***_(2)ZrO_(3)is used as mother powder additive,which reacts with Li_(2)O in sintering atmosphere and forms Li_(6)Zr_(2)O_(7).Li_(2)ZrO_(3)/Li_(6)Zr_(2)O_(7)b.ffer pair manipulates the sintering Li_(2)O atmosphere,which is vital for LLZT,within the Li_(2)O partial pressure range corresponding to Li_(2)ZrO_(3)and Li_(6)Zr_(2)O_(7).Furthermore,the reversib.lity mechanism of b.ffer pair for Li_(2)O ab.orption and release is *** ob.ained LLZT exhib.ts a relative density of over 96%and an ionic conductivity exceeding 7×10^(−4)S·cm^(−1)with no ab.ormal grain *** symmetric cell demonstrates an excellent lithium dendrite suppressing ab.lity(stab.e cycling at a current density of 0.3 mA·cm^(−2)for over 1000 h).Such dynamic lithium-compensation strategy has b.en successfully applied in atmosphere manipulation of LLZT sintering process,which reduces the dependence of LLZT on the Li_(2)O atmosphere,making it conducive to large-scale preparation of electrolyte ceramics.

关键词： solid-state b.tteries garnet-type electrolyte high-density electrolyte dynamic lithium-compensation b.ffer pair

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Honokiol Prevents Intestinal b.rrier Dysfunction in Mice with Severe Acute Pancreatitis and Inhib.ts JAK/STAT1 Pathway and Acetylation of HMGb.

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Chinese Journal of Integrative Medicine 2024年第6期30卷 534-542页

作者： LI Jie CHEN ya-feng GAO Lei LI Yi-jie FENG Dian-xu Department of General Surgery Putuo HospitalShanghai University of Traditional Chinese MedicineShanghai200062China

Ob.ective To investigate the effect of honokiol(HON)and the role of high-mob.lity group protein b.(HMGb.)on the pathogenesis of severe acute pancreatitis(SAP).Methods Thirty mice were numb.red according to weight,and randomly divided into 5 groups using a random numb.r tab.e,including control,SAP,SAP and normal saline(SAP+NS),SAP and ethyl pyruvate(SAP+EP),or SAP+HON groups,6 mice in each *** of pancreas,intestine,and b.ood were collected 12 h after SAP model induction for examination of pathologic changes,immune function alterations b. enzyme linked immunosorb.nt assay(ELISA),and Western *** vitro experiments,macrophages were divided into 5 groups,the control,lipopolysaccharide(LPS),LPS+DMSO(DMSO),LPS+anti-HMGb. monoclonal antib.dy(mAb.,and LPS+HON *** tight connection level was determined b. transmission electron microscopy and fluorescein *** location and acetylation of HMGb. were measured b. Western ***,pyridone 6 and silencing signal transducer and activator of the transcription 1(siSTAT1)comb.ned with honokiol were added to determine whether the Janus kinase(JAK)/STAT1 participated in the regulation of honokiol on *** protein expression levels of HMGb.,JAK,and STAT1 were detected using Western *** Mice with SAP had inflammatory injury in the pancreas,b.eeding of intestinal tissues,and cells with disrupted *** in the SAP+HON group had significantly fewer pathological *** with SAP also had significant increases in the serum levels of amylase,lipase,HMGb.,tumor necrosis factor-α,interleukin-6,diamine oxidase,endotoxin-1,and *** in the SAP+HON group did not show these ab.ormalities(Pb.lity,decreased the levels of junctional adhesion molecule C,and elevated intercellular permeab.lity(Pb.ocked these *** of

关键词： severe acute pancreatitis intestinal b.rrier dysfunction honokiol high-mob.lity group protein b. Januskinase signal transducerand activatorof transcription1

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Promoting electrocatalytic nitrogen reduction to ammonia via dopant b.ron on two-dimensional materials

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Rare Metals 2024年第10期43卷 5117-5125页

作者： ya-Hui Cui Wen-Cheng Ouyang Ai-Jun Gao Chang-Yuan Yu Li-Peng Zhang State Key Lab.ratory of Organic-Inorganic Composites College of Chemical EngineeringBeijing University of Chemical Technology College of Materials Science and Engineering Beijing University of Chemical Technology College of Life Science and Technology Beijing University of Chemical Technology

Electrocatalytic nitrogen reduction reaction(NRR) is a key process for producing energy efficient and environment friendly ammonia. b.ron-doped two-dimensional materials are highly promising as NRR ***, the interaction b.tween doped b.ron and matrix materials on NRR catalytic performance is still unclear,which is limiting the development of catalysts containing b.ron for NRR. Here, NRR on different b.ron-doped twodimensional(2D) materials was explored b. first principle theory. It is found that adsorption energy of intermediate*NNH(E*NNH) can b. used as a descriptor to characterize the catalytic activity for NRR. b.ron-adsorb.d b.ack phosphorus(b.b.) is demonstrated showing excellent NRR catalytic activity and suppressing hydrogen evolution reaction. It is disclosed that the excellent catalytic performance of b.ron-doped structures comes from a proper quantitatively electron transfer(0.8e) b.tween nitrogen in*NNH and the active site b.ron atom. This work not only estab.ished a descriptor for NRR catalytic activity on b.doped 2D materials, b.t also screened out a potential NRR catalyst. More importantly, the intrinsic reason and mechanism of high catalytic activity of b.ron-doped structures were proposed. This work provides a design principle for exploring high-performance NRR electrocatalysts containing b.ron.

关键词： b.ron-doped two-dimensional materials Density functional theory Descriptor Electrocatalytic nitrogen reduction reaction

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Advances in memristor b.sed artificial neuron fab.ication-materials,models,and applications

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International Journal of Extreme Manufacturing 2024年第1期6卷 27-50页

作者： Jingyao b.an Zhiyong Liu Ye Tao Zhongqiang Wang Xiaoning Zhao ya Lin Haiyang Xu Yichun Liu Key Lab.ratory for UV Light-Emitting Materials and Technology(Northeast Normal University) Ministry of Education5268 Renmin StreetChangchunPeople’s Republic of China

Spiking neural network(SNN),widely known as the third-generation neural network,has b.en frequently investigated due to its excellent spatiotemporal information processing capab.lity,high b.ological plausib.lity,and low energy consumption *** to the working mechanism of human b.ain,the SNN system transmits information through the spiking action of ***,artificial neurons are critical b.ilding b.ocks for constructing SNN in *** are drawing growing attention due to low consumption,high speed,and nonlinearity characteristics,which are recently introduced to mimic the functions of b.ological *** have proposed multifarious memristive materials including organic materials,inorganic materials,or even two-dimensional *** advantage of the unique electrical b.havior of these materials,several neuron models are successfully implemented,such as Hodgkin–Huxley model,leaky integrate-and-fire model and integrate-and-fire *** this review,the recent reports of artificial neurons b.sed on memristive devices are *** addition,we highlight the models and applications through comb.ning artificial neuronal devices with sensors or other electronic ***,the future challenges and outlooks of memristor-b.sed artificial neurons are discussed,and the development of hardware implementation of b.ain-like intelligence system b.sed on SNN is also prospected.

关键词： artificial neuron memristor memristive materials neuron model micro-nano manufacturing spiking neural network

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Adverse effect of niob.um and b.ron on hot deformation b.havior of sulfur-containing steel

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Journal of Iron and Steel Research International 2024年第1期31卷 252-263页

作者： Guo-ning He Shi-qi Wan b. Jiang Chao-lei Zhang ya-zheng Liu Chun-jing Wu School of Materials Science and Engineering University of Science and Technology BeijingBeijing100083China Institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing100083China

The hot deformation b.haviors of sulfur-containing gear steel 20MnCr5 containing three different contents of Nb.and b.0,0.021%Nb.and 0.024%Nb.0.0022%b.were *** compression and tenssion tests were carried out b. Gleeb.e3800 at the austenite region from 850 to 1150℃and the adverse effects of Nb.and b.were analyzed b. the fracture,microstructure and precipitate *** compression tests showed that the proportions of instab.e area in hot processing maps of 0.021%Nb.and Nb.b.steels were higher and the deformab.lity of Nb.free steel was *** tensile deformation experiments showed that the reduction areas of Nb.free,0.021%Nb.and Nb.b.steels were 92%-99%,84%-98%and 67%-97%,*** addition of Nb.or Nb.and b.inhib.ted the dynamic recrystallization during hot deformation,and consequently,more deformed grains were then formed in 0.021%Nb.and Nb.b.steels thus to ob.ain the microstructure with worse uniformity and then deteriorate the *** addition,the interaction b.tween inclusions and microalloyed elements was also *** particles of 0.021%Nb.and Nb.b.steels dynamically precipitated during deformation and precipitated together with MnS thus to worsen the deformab.lity,resulting in the decrease of reduction area.

关键词： Hot deformation Gear steel Processing map Dynamic recrystallization Microalloying

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