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Therm.dynam.c analysis of m.tal segregation in dual phase high entropy ceram.cs

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Journal of m.teriom.cs 2024年第4期10卷 889-895页

作者： Steven m.Sm.th II William.G.Fahrenholtz gregory E.Hilm.s Stefano Curtarolo m.ssouri University of Science and Technology Materials Science and Engineering DepartmentRollaMO65409USA Duke University Department of Mechanical Engineering and Materials ScienceDurhamNC27708USA Duke University Center of Autonomous Materials DesignDurhamNC27708USA

Equilibrium.Gibbs'free energy calculations were used to determ.ne m.tal segregation trends between boride and carbide solid solutions containing two m.tals that are relevant to dual phase high entropy *** m.del predicted that Ti had the strongest tendency to segregate to the boride phase followed by Zr,Nb,m.,V,Hf,and Ta,which m.tches experim.ntal results of m.asured *** ratio of a m.tal in the carbide phase to the content of the sam. m.tal in the corresponding m.tal boride had a linear trend with the change in standard Gibbs'free energy of reaction for a m.tal carbide reacting with B_(4)C to produce its corresponding m.tal boride and *** proposed m.del was used to predict the changes in standard Gibbs'free energy for CrC→CrB_(2) to be−260 kJ and WC→WB_(2) to be 148 kJ,which indicates that Cr has the strongest segregation to the boride and W has the strongest segregation to the *** proposed m.del can be used to estim.te the segregation of m.tals in dual phase high entropy boride-carbide ceram.cs of any boride/carbide ratio or m.tal content.

关键词： Dual phase High entropy ceram.c Boride Carbide Therm.dynam.cs

Is salm.nid m.gration at risk from.chem.cal inform.tion disruption?

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Aquaculture and Fisheries 2024年第3期9卷 378-387页

作者： Keith B.Tierney gregory G.Pyle Biological Sciences College of Natural and Applied SciencesEdmontonABT6G 2E9Canada School of Public Health College of Health SciencesEdmontonABT6G 1C9Canada Departm.nt of Biological Sciences University of LethbridgeLethbridgeABT1K 3M4Canada

Good inform.tion is the basis for good *** m.ny invaluable salm.n species,chem.cal inform.tion is necessary to guide and fine-tune their m.grations to and from.freshwater m.ting grounds.A problem.is that salm.n of the current world are running a gauntlet of toxic chem.cals arising from.diverse anthropogenic inputs and these chem.cals are known to disrupt *** is sufficient evidence that effluents from.cities,m.nes,agriculture and industry contain chem.cals that can rapidly,and som.tim.s irreversibly,im.air the olfactory sense that salm.n use to gather *** toxic inputs m.y not only be strong enough to im.air m.gration,but be strong enough to redirect salm.n away from.their *** is also evidence that som. synthetic chem.cals m.y serve as the basis for ‘new’ inform.tion and be useful in m.king correct m.gratory *** the plus side,there are exam.les of new regulations that lim.t the input of chem.cals of known olfactory toxicity,but on the m.nus side,increased urbanization and global clim.te change will likely increase the num.er and/or severity of som. neurotoxic *** we identify the specific avenues of chem.cal risks to inform.tion disruption and in so doing prioritize and rank the risks to m.grating *** data collected here can be used to lay the foundation for m.delling the effects of anthropogenic inputs on inform.tion disruption in diverse salm.nid species from.around the world and therefore help secure their longevity in a changing chem.cal environm.nt.

关键词： Salm.n m.gration Ocean ranching Chem.cal inform.tion disruption Hom.ng disruption Olfactory toxicity

High Tem.erature Iron Ethylene Polym.rization Catalysts Bearing N,N,N'-2-(1-(2,4-Dibenzhydryl-6-fluorophenylim.no)ethyl)-6-(1-(arylphenylim.no)ethyl)pyridines

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Chinese Journal of Polym.r Science 2024年第2期42卷 188-201,I0007页

作者： Chantsalnyam.Bariashir Qiu-Yue Zhang Bayasgalan Ulam.ayar gregory A.Solan Tong-Ling Liang Wen-Hua Sun Institute of Chem.stry and Chem.cal Technology Mongolian Academy of SciencesUlaanbaatar13330Mongolia Key Laboratory of Engineering Plastics and Beijing National Laboratory for m.lecular Science Institute of ChemistryChinese Academy of SciencesBeijing100190China Departm.nt of Chem.stry University of LeicesterUniversity RoadLeicesterLE17RHUK State Key Laboratory for Oxo Synthesis and Selective Oxidation Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou730000China

The N,N,N'-ferrous chloride com.lexes,[2-{Cm.N(2,4-(CHPh)_(2)-6-FC_(6)H_(2))}-6-(Cm.NAr)C_(5)H_(3)N]FeCl_(2)(Ar=2,6-m._(2)C_(6)H_(3) Fe1,2,6-Et_(2)C_(6)H_(3)Fe2,2,6-^(i)Pr_(2)C_(6)H_(3) Fe3,2,4,6-m._(3)C_(6)H_(2) Fe4 and 2,6-Et_(2)-4-m.C_(6)H_(2) Fe5),each possessing one N-2,4-dibenzhydryl-6-fluorophenyl group,were readily synthesized from.their respective unsym.etrical bis(im.no)pyridines,*** identification of Fe2 highlighted the variation in the steric properties provided by the dissim.lar N-aryl *** pre-treatm.nt with either m.O or m.AO,com.lexes Fe1-Fe5 all displayed,at an operating tem.erature of 80℃,high activities for ethylene polym.rization with levels falling in the order:Fe4> Fe1> Fe5> Fe2> ***,Fe4/m.O displayed the highest activity of 1.94×10^(7) g_(PE)·m.l_(Fe)^(-1)·h^(-1) of the study with only a m.dest loss in perform.nce at 90℃.Generally,the resulting polyethylenes were highly linear(T_(m. range:122-132℃),narrowly disperse and of low m.lecular weight(m.(w) range:6.73-46.04kg·m.l^(-1)),with the m.st sterically hindered Fe3 form.ng the highest m.lecular weight polym.r of the ***-group analysis by ^(1)H-and ^(13)CNm. spectroscopy revealed saturated alkyl(n-propyl and i-propyl) and unsaturated vinyl chain ends indicative of the role of both β-H elim.nation and chain transfer to alum.num.as term.nation *** com.arison with previou sly reported iron precatalysts with sim.lar tridentate ligand skeletons,it is evident that the introduction of a large benzhydryl group in com.ination with a fluorine as the ortho-substituents of one N-aryl group has the effect of enhancing therm.l stability of the iron polym.rization catalyst whilst m.intaining appreciable polym.r m.lecular weight.

关键词： Iron catalyst Ethylene polym.rization Linear polyethylene Fluoride effect Therm.l stability

Integrins and their potential roles in m.m.alian pregnancy

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Journal of Anim.l Science and Biotechnology 2024年第1期15卷 1-19页

作者： gregory A.Johnson Robert C.Burghardt Fuller W.Bazer Heewon Seo Joe W.Cain Departm.nt of Veterinary Integrative Biosciences School of Veterinary Medicine and Biomedical SciencesTexas A&M UniversityCollege StationTX 77843‑4459USA Departm.nt of Anim.l Science College of Agriculture and Life SciencesTexas A&M UniversityCollege StationTX 77843‑2471USA

Integrins are a highly com.lex fam.ly of receptors that, when expressed on the surface of cells, can m.diate reciprocal cell-to-cell and cell-to-extracellular m.trix(ECm. interactions leading to assem.ly of integrin adhesion com.lexes(IACs) that initiate m.ny signaling functions both at the m.m.rane and deeper within the cytoplasm.to coordinate processes including cell adhesion, m.gration, proliferation, survival, differentiation, and m.tabolism. All m.tazoan organism. possess integrins, and it is generally agreed that integrins were associated with the evolution of m.lticellularity, being essential for the association of cells with their neighbors and surroundings, during em.ryonic developm.nt and m.ny aspects of cellular and m.lecular biology. Integrins have im.ortant roles in m.ny aspects of em.ryonic developm.nt, norm.l physiology, and disease processes with a m.ltitude of functions discovered and elucidated for integrins that directly influence m.ny areas of biology and m.dicine, including m.m.alian pregnancy, in particular im.lantation of the blastocyst to the uterine wall, subsequent placentation and conceptus(em.ryo/fetus and associated placental m.m.ranes) developm.nt. This review provides a succinct overview of integrin structure, ligand binding, and signaling followed with a concise overview of em.ryonic developm.nt, im.lantation, and early placentation in pigs, sheep, hum.ns, and m.ce as an exam.le for rodents. A brief tim.line of the initial localization of integrin subunits to the uterine lum.nal epithelium.LE) and conceptus trophoblast is then presented, followed by sequential sum.aries of integrin expression and function during gestation in pigs, sheep, hum.ns, and rodents. As appropriate for this journal, sum.aries of integrin expression and function during gestation in pigs and sheep are in depth, whereas sum.aries for hum.ns and rodents are brief. Because sim.lar m.dels to those illustrated in Fig. 1, 2, 3, 4, 5 and 6 are present throughout the sc

关键词： Hum.ns Im.lantation Integrins Pigs Pregnancy Rodents Sheep

住院患者认知障碍识别和信息管理的整合性综述

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International Journal of Nursing Sciences 2024年第1期11卷 120-132页

作者：熊蓓蓓 Daniel X.bailey Paul Prudon Elaine m.Pascoe Leonard C.Gray Frederick Graham.Am.nda Henderson m.linda m.rtin-Khan Centre for Health Services Research Faculty of MedicineThe University of QueenslandBrisbaneAustralia Centre for Clinical Research Faculty of MedicineThe University of QueenslandRoyal Brisbane&Women’s HospitalBrisbaneAustralia Dem.ntia and Delirium Division of MedicinePrincess Alexandra HospitalBrisbaneAustralia School of Nursing Faculty of HealthQueensland University of TechnologyBrisbaneAustralia Nursing Practice Developm.nt Unit Princess Alexandra HospitalBrisbaneAustralia School of Nursing Midwifery and Social SciencesCentral Queensland UniversityBrisbaneAustralia Griffith Health Griffith UniversityBrisbaneAustralia School of Nursing Midwifery and ParamedicineThe University of the Sunshine CoastBrisbaneAustralia Departm.nt of Health and Life Sciences University of ExeterExeterUnited Kingdom School of Nursing University of Northern British ColumbiaPrince GeorgeCanada

目的旨在对目前提供急性照护的医院识别认知障碍患者以及在病历中记录和管理认知相关信息的实际情况及政策要求和推荐方法进行综述。方法采用Whittem.re和Knaf1的五步法,系统检索m.dline,CINAHL和Scopus数据库,并检索了灰色文献来源。... 详细信息

目的旨在对目前提供急性照护的医院识别认知障碍患者以及在病历中记录和管理认知相关信息的实际情况及政策要求和推荐方法进行综述。方法采用Whittem.re和Knaf1的五步法,系统检索m.dline,CINAHL和Scopus数据库,并检索了灰色文献来源。纳人了提供急性照护的医院已实施的患者认知障碍识别和认知信息管理相关的文献。采用混合方法评价工具和灰色文献质量评估清单对文章质量进行评价。采用主题分析法呈现和整合结果。该综述已在PROSPERO预注册(CRD42022343577)。结果共22篇原始研究文献和10篇政府/行业文件被纳人分析。结果显示,实践和政策之间存在差距。尽管在政策层面上高度重视认知障碍的识别、认知相关信息的透明度,以及与患者、家属和照顾者(如适用)之间的互动,但有时在临床实践中,认知评估是非正式的,患者的认知相关信息未作记录,与患者、家属和照顾者的互动也存在不足。结论.通过整合认知评估,利用信息技术开发信息管理综合系统,建立相关法律法规,提供教育与和培训,并采用国家层面的策略,有可能显著改善对认知障碍患者的识别和护理。

关键词：急性照护认知功能障碍数据透明度谵妄痴呆健康信息管理与患者互动.

晶粒长大对高纯Al{111}/{111}近奇异晶界的影响

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金属学报 2024年第1期60卷 80-94页

作者：冯小铮王卫国 gregory S.Rohrer 陈松洪丽华林燕王宗谱周邦新福建理工大学晶界工程研究所福州350118 福建理工大学材料科学与工程学院福州350118 Departm.nt of m.terials Science and Engineering Carnegie Mellon UniversityPittsburghPA 15213-3890USA 上海大学材料研究所上海200072

{111}/{111}近奇异晶界较比一般晶界更耐蚀,如何提高此类晶界比例以显著提高Al及其合金晶界腐蚀抗力是一个新课题。本工作选用99.99%(质量分数)高纯Al为研究对象,考察晶粒长大对{111}/{111}近奇异晶界的影响。样品经室温多向锻造和370... 详细信息

{111}/{111}近奇异晶界较比一般晶界更耐蚀,如何提高此类晶界比例以显著提高Al及其合金晶界腐蚀抗力是一个新课题。本工作选用99.99%(质量分数)高纯Al为研究对象,考察晶粒长大对{111}/{111}近奇异晶界的影响。样品经室温多向锻造和370℃再结晶退火后,再经500℃保温不同时间,采用基于EBSD和五参数分析的晶界界面匹配表征方法对样品进行测试和分析。结果表明,随着晶粒长大,{111}/{111}近奇异晶界的比例显著增加。当平均晶粒尺寸由38μm.大至77μm.,{111}/{111}近奇异晶界的比例由3.91%增加至6.56%。离线原位EBSD和晶界迹线分析表明,晶粒长大过程中,{111}/{111}近奇异晶界主要通过具有/θ(θ为取向差转角)取向差关系的两两晶粒吞并周边晶粒并相遇后形成;具有/θ取向差关系的相邻晶粒,其晶界通过再取向调整至{111}/{111}位置,亦可形成此类近奇异晶界。{111}/{111}近奇异晶界存在旋错结构,其原子排列有序度显著高于一般晶界,这是此类晶界比一般晶界更耐蚀的原因。

关键词：高纯Al 晶粒长大近奇异晶界晶界界面匹配

Association between Exposure to m.tals during Pregnancy,Childhood Gut m.crobiom.,and Risk of Intestinal Inflam.ation in Late Childhood

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Environm.nt & Health 2024年第10期2卷 739-749页

作者： Vishal m.dya m.nasi Agrawal Jam.l m.Lane Chris Gennings Leonid Tarassishin Libni A.Torres-Olascoaga Joseph Eggers Jill K.gregory m.llissa Picker Inga Peter Jerem.ah J.Faith m.nish Arora m.rtha m.Tellez-Rojo Robert O.Wright Jean-Frederic Colom.el Shoshannah Eggers Departm.nt of Environm.ntal m.dicine and Clim.te Science Icahn School of Medicine at Mount SinaiNew York 10029-6574New YorkUnited States Division of Gastroenterology Icahn School of Medicine at Mount SinaiNew York 10029-6574New YorkUnited States Center for m.lecular Prediction of Inflam.atory Bowel Disease(PREDICT) Department of Clinical MedicineAalborg UniversityCopenhagen 9220Denmark Departm.nt of Genetics and Genom.c Sciences Icahn School of MedicineNew York 10029-6574New YorkUnited States Center for Research on Nutrition and Health National Institute of Public HealthCuernavaca 62508Mexico Departm.nt of Im.unology and Im.unotherapy Icahn School of Medicine at Mount SinaiNew York 10029-6574New YorkUnited States Departm.nt of Epidem.ology University of Iowa College of Public HealthIowa City 52242 IowaUnited States Instructional Technology Group Icahn School of Medicine at Mount SinaiNew York 10029-6574New YorkUnited States

Alterations to the gut m.crobiom. and exposure to m.tals during pregnancy have been suggested to im.act inflam.atory bowel ***,how prenatal exposure to m.tals eventually results in long-term.effects on the gut m.crobiom.,leading to subclinical intestinal inflam.ation,particularly during late childhood,has not been *** is also unknown whether such an interactive effect drives a specific subgroup of children toward elevated susceptibility to intestinal *** used an am.lgam.tion of m.chine-learning techniques with a regression-based fram.work to explore if children with distinct sets of gut m.crobes and certain patterns of exposure to m.tals during pregnancy(m.tal−m.crobial clique signature)had a higher likelihood of intestinal inflam.ation,m.asured based on fecal calprotectin(FC)in late *** obtained sam.les from.a well-characterized longitudinal birth cohort from.m.xico City(n=108),*** the second and third trim.sters of pregnancy,11 m.tals were m.asured in whole *** m.crobial abundances and FC were m.asured in stool sam.les from.children 9−11 years of *** FC was defined as having FC above 100μg/g of *** identified subgroups of children in whom.m.crobial and m.tal−m.crobial clique signatures were associated with elevated FC(false discovery rate(FDR)m.tal−m.crobial clique signatures significantly associated with elevated FC:(1)low cesium.Cs)and copper(Cu)in the third trim.ster and low relative abundance of Eubacterium.ventriosum.OR[95%CI]:10.27[3.57,29.52],FDRm.ster and high relative abundances of Roseburia inulinivorans and Rum.nococcus torques(OR[95%CI]:7.21[1.81,28.77],FDRm.nstrates that children with specific gut m.crobes and specific exposure patterns to m.tals during pregnancy m.y have higher fecal calprotectin levels in late childhood,denoting an elevated risk of intestinal inflam.ation.

关键词： exposom. m.tals m.chine learning m.crobiom. environm.ntal epidem.ology intestinal inflam.ation

Assessing risks from.m.ning-induced ground m.vem.nts near gas wells

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International Journal of m.ning Science and Technology 2020年第1期30卷 11-16页

作者： Christopher m.rk gregory m.Rum.augh m.ne Safety and Health Adm.nistration PittsburghPAUSA

The proliferation of unconventional gas well developm.nt in the Northern Appalachian coalfields has raised a num.er of m.ne safety *** wells,which extract gas from.deep shale form.tions,are characterized by gas volum.s and pressures that are significantly higher than those observed at m.ny conventional *** gas is com.osed largely of m.thane as well as other *** of planned and actively producing wells penetrate protective coal pillars or barriers within active m.ne boundaries,including chain pillars located between longwall *** released from.a well dam.ged by m.ning-induced ground m.vem.nts could pose a risk to m.ners by flowing into the m.ne *** m.ning-induced ground m.vem.nts that m.y cause well dam.ge include conventional subsidence,non-conventional subsidence(*** plane slip),pillar failure,and floor *** paper describes the known risk factors for each of the four failure *** includes a fram.work that can guide the risk assessm.nt process when m.ning takes place near gas or oil wells.

关键词： Gas well Subsidence Coal protection pillar Risk m.trix Longwall m.ning

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有向图上的一些猜想和开放问题

数学进展 2024年第1期53卷 1-12页

作者：艾江东 gregory GUTIN 史永堂 Ander YEO 南开大学数学科学学院核心数学与组合数学教育部重点实验室天津300371 伦敦大学皇家霍洛威学院计算机科学系英国萨里郡TW200EX 南开大学组合数学中心核心数学与组合数学教育部重点实验室天津300371 南丹麦大学数学与计算机科学系丹麦欧登塞M区DK-5230 约翰内斯堡大学数学与应用数学系南非约翰内斯堡2006

讨论了有向图上的几个猜想和开放问题.一些尚未解决的问题是新的.

关键词：有向图出度圈路分划最大有向割集拟核 Seym.ur二次邻域猜想无圈2-染色