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Intra-and interspecific diversity analyses in the genus Eremurus in Iran using genotyping-bysequencing reveal geographic population structure

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horticulture Research 2020年第1期7卷 2382-2394页

作者： hanieh hadizadeh Bochra A.Bahri Peng Qi h.dayton wilde Katrien M.Devos Department of horticulture Faculty of AgricultureTarbiat Modares UniversityTehranIran Laboratory of Bioaggressors and Integrated Protection in Agriculture The National Agronomic Institute of TunisiaUniversity of Carthage1082 TunisTunisia Institute of Plant Breeding Genetics and Genomics(Department of Crop and Soil Sciences)and Department of Plant BiologyUniversity of GeorgiaAthensGA 30602USA Institute of Plant Breeding Genetics and Genomics(Department of Horticulture)University of GeorgiaAthensGA 30602USA Present address:Department of Plant Pathology University of GeorgiaGriffinGA 30223USA

Eremurus species,better known as‘Foxtail Lily’or‘Desert Candle’,are important worldwide in landscaping and the cutflower *** of the centers of highest diversity of the genus Eremurus is Iran,which has seven ***,little is known about the genetic diversity within the genus *** the advent of genotyping-bysequencing(GBS),it is possible to develop and employ single nucleotide polymorphism(SNP)markers in a costefficient manner in any species,regardless of its ploidy level,genome size or availability of a reference *** structure and phylogeographic analyses of the genus Eremurus in Iran using a minimum of 3002 SNP markers identified either at the genus level or at the species level from GBS data showed longitudinal geographic structuring at the country scale for the genus and for the species *** and ***,and at the regional scale for *** analyses furthermore showed a close genetic relatedness between *** and *** to the extent that they should be considered subspecies within an ***/stenophyllus species *** close genetic relatedness may explain why crosses between these two(sub)species have been found in the wild and are exploited extensively as ***,current species identification,while robust,relies on flower morphology.A subset of seven SNPs with species-specific(private)alleles were selected that differentiate the seven Eremurus *** markers will be especially useful for cultivar protection and in hybrid production,where true hybrids could be identified at the seedling stage.

关键词： structure furthermore centers

Intestinal organoids as tools for enriching and studying specific and rare cell types:advances and future directions

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Journal of Molecular Cell Biology 2020年第8期12卷 562-568页

作者： Kim E.Boonekamp Talya L.dayton hans Clevers Oncode Institute Hubrecht InstituteRoyal Netherlands Academy of Arts and Sciences(KNAW)and University Medical Centre(UMC)Utrecht358A CT UtrechtThe Netherlands Princess Maxima Centre for Paediatric Oncology 358A CS UtrechtThe Netherlands

Adult tissue-derived organoids allow for the expansion and maintenance of primary epithelial cells in a near-native *** 3D and self-organizing organotypic cultures derived from adult tissues have been increasingly used in fundamental and translational research.A key feature of this organoid system is that it recapitulates the stem cell lineage and thus,the differentiated cell-type heterogeneity of the in vivo tissue of origin.

关键词： directions organo rare

Using Crop Management Scenario Simulations to Evaluate the Sensitivity of the Ohio Phosphorus Risk Index

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Journal of Environmental Protection 2017年第2期8卷 141-158页

作者： Elizabeth A. dayton Christopher h. holloman Sakthi Subburayalu Mark D. Risser School of Environment and Natural Resources The Ohio State University Columbus OH USA Statistical Consulting Services Department of Statistics The Ohio State University Columbus OH USA

Phosphorus (P) risk indices are commonly used in the USA to estimate the field-scale risk of agricultural P runoff. Because the Ohio P Risk Index is increasingly being used to judge farmer performance, it is important to evaluate weighting/scoring of all P Index parameters to ensure Ohio farmers are credited for practices that reduce P runoff risk and not unduly penalized for things not demonstrably related to runoff risk. A sensitivity analysis provides information as to how sensitive the P Index score is to changes in inputs. The objectives were to determine 1) which inputs are most highly associated with P Index scores and 2) the relative impact of each input variable on resultant P Index scores. The current approach uses simulations across 6134 Ohio point locations and five crop management scenarios (CMSs), representing increasing soil disturbance. The CMSs range from all no-till, which is being promoted in Ohio, rotational tillage, which is a common practice in Ohio to full tillage to represent an extreme practice. Results showed that P Index scores were best explained by soil test P (31.9%) followed by connectivity to water (29.7%), soil erosion (13.4%), fertilizer application amount (11.3%), runoff class (9.5%), fertilizer application method (2.2%), and finally filter strip (2.0%). Ohio P Index simulations across CMSs one through five showed that >40% scored hile 45 points (very high). Given Ohio water quality problems, the Ohio P Index needs to be stricter. The current approach is useful for Ohio P Index evaluations and revision decisions by spatially illustrating the impact of potential changes regionally and state-wide.

关键词： Ohio P Index Sensitivity Analysis P Index Simulations RUSLE2 Simulations Crop Management Simulations

MAGNETIZATION BEhAVIOR IN SINTERED Nd-Fe-B MAGNETS

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Journal of Rare Earths 1990年第1期8卷 37-42页

作者： Li Dong(Central Iron & Steel Research Institute,Beijing 100081,P.R.China)K.J.Strnat h.F.Mildrum(University of dayton,USA)

Magnetization and demagnetization curves and hysteresis loops applied different *** in sintered Nd-Fe-B and Nd-Dy-Fe-B magnets from thermally demagnetized and dc field-demagnetized states were investigated at temperatures of up to 150℃.The first-quadrant remagnetization curves and the curves of coercive forces _Mh_C versus rernagnetizing fietds h_m from dc field-demagnetized state at room temperature show a step around magnetizing field as absolute value of the maximum intrinsic *** steps of _Mh_C-h_m curves shifted to lower remagnetizing fields and the shapes of magnetization curves changed from step type to precipitous type when temperature went up to 100～150℃ or after the specimen was thermally demagnetized at a temperature higher than the Curie *** steep rise of knee coereivity with increasing magnetizing field is behind that of _Mh_*** that the magnetic hardening in sintered Nd-Fe-B magnets is controlled by pinning of domain walls.

关键词： Dy Fe MAGNETIZATION BEhAVIOR IN SINTERED Nd-Fe-B MAGNETS Nd

A Model of high-Speed Endovascular Sonothrombolysis with Vortex Ultrasound-Induced Shear Stress to Treat Cerebral Venous Sinus Thrombosis

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Research 2023年第1期2023卷 1-13页

作者： Bohua Zhang huaiyu Wu howuk Kim Phoebe J.Welch Ashley Cornett Greyson Stocker Raul G.Nogueira Jinwook Kim Gabe Owens Paul A.dayton Zhen Xu Chengzhi Shi Xiaoning Jiang Department of Mechanical&Aerospace Engineering North Carolina State UniversityRaleighNCUSA Department of Mechanical Engineering Inha University IncheonRepublic of Korea George W.Woodruff School of Mechanical Enginering Grgia lnstitute of TechnlogyAtlantaGAUSA Department of Biomedical Engineering University of Michigan Ann ArborMIUSA Department of Neurology Universityof Pittsburgh Medical CenterPttsburghPA USA Department of Biomedical Engineering University of North CarolinaChapel HillNCUSA Parker h.Petit Institute for Bioengineering and Bioscience Georgia Institute of TechnologyAtlantaGAUSA

This research aims to demonstrate a novel vortex ultrasound enabled endovascular thrombolysis method designed for treating cerebral venous sinus thrombosis(CVST).This is a topic of substantial importance since current treatment modalities for CVST still fail in as many as 20%to 40%of the cases,and the incidence of CvST has increased since the outbreak of the coronavirus disease 2019 *** with conventional anticoagulant or thrombolytic drugs,sonothrombolysis has the potential to remarkably shorten the required treatment time owing to the direct clot targeting with acoustic ***,previously reported strategies for sonothrombolysis have not demonstrated clinically meaningful outcomes(e.g.,recanalization within 30 min)in treating large,completely occluded veins or ***,we demonstrated a new vortex ultrasound technique for endovascular sonothrombolysis utilizing wavematter interaction-induced shear stress to enhance the lytic rate *** in vitro experiment showed that the lytic rate was increased by at least 64.3%compared with the nonvortex endovascular ultrasound treatment.A 3.1-g,7.5-cm-long,completely occluded in vitro 3-dimensional model of acute CVST was fully recanalized within 8 min with a record-high lytic rate of 237.5 mg/min for acute bovine clot ***,we confirmed that the vortex ultrasound causes no vessel wall damage over ex vivo canine *** vortex ultrasound thrombolysis technique potentially presents a new life-saving tool for severe CVST cases that cannot be efficaciously treated using existing therapies.

关键词： thrombolysis drugs vortex

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圣曼纽尔大型铜-钼选矿厂现代化

有色矿山 1989年第2期18卷 35-38页

作者： Stanley h.dayton 徐赞生

马格马铜公司计划投资900万美元改造圣曼纽尔硫化矿选矿厂,预期不仅可提高选矿厂效能,还可使选矿厂每年节省300万美元费用。选矿厂改造包括:在七个磨矿系列中,倾斜45°安装的φ26英寸水力旋流器将取代老的φ20英寸水力旋流器;在13个磨... 详细信息

马格马铜公司计划投资900万美元改造圣曼纽尔硫化矿选矿厂,预期不仅可提高选矿厂效能,还可使选矿厂每年节省300万美元费用。选矿厂改造包括:在七个磨矿系列中,倾斜45°安装的φ26英寸水力旋流器将取代老的φ20英寸水力旋流器;在13个磨矿系列中将安装数字可编程序控制器代替老式过时的控制器:用10台2000英尺~3Maxwell 浮选机和80台300英尺~3Wemco 浮选机代替780台40英尺~3粗选浮选机,安装一台载流分析和浮选流量控制装置;用φ6英尺×39英尺高的浮选柱代替七个普通浮选机二段精选回路.

关键词：铜-钼矿选矿厂现代化

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炭吸附法提取金

黄金科学技术 1988年第5期 21-22+20页

作者： S.h.dayton 林春梅

炭吸附工艺正如美国内华达州雷诺矿山局研究中心的化学工程师J.A.艾赛尔在其论文中指出,长期以来一直公认炭是从溶液中提取金银的良好吸附剂。利用活性炭从浸出液中吸附金和银的技术,实际上早在1894年就已获

关键词：炭浆法 NaOh 美国矿山局 NaCN 炭浸法浸出槽炭吸附

Silicene nanoribbons as carbon monoxide nanosensors with molecular resolution

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Nano Research 2014年第7期7卷 945-952页

作者： Tim h. Osborn Amir A. Farajian Department of Mechanical and Materials Engineering Wright State University Dayton Ohio 45435 USA

Applications based on silicene as grown on substrates are of high interest toward actual utilization of this unique material. here we explore, from first principles, the nature of carbon monoxide adsorption on semiconducting silicene nanoribbons and the resulting quantum conduction modulation with and without silver contacts for sensing applications. We find that quantum conduction is detectably modified by weak chemisorption of a single CO molecule on a pristine silicene nanoribbon. This modification can be attributed to the charge transfer from CO to the silicene nanoribbon and the deformation induced by the CO chemisorption. Moderate binding energies provide an optimal mix of high detectability and recoverability. With Ag contacts attached to a -1 nm silicene nanoribbon, the interface states mask the conductance modulations caused by CO adsorption, emphasizing length effects for sensor applications. The effects of atmospheric gases--nitrogen, oxygen, carbon dioxide, and water--as well as CO adsorption density and edge-dangling bond defects, on sensor functionality are also investigated. Our results reveal pristine silicene nanoribbons as a promising new sensing material with single molecule resolution.

关键词： silicene silicon nanoribbon nanosensor carbon monoxide quantum transport contacts ab initio simulations

Design of refractory multi-principal-element alloys for high-temperature applications

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npj Computational Materials 2023年第1期9卷 884-893页

作者： Gaoyuan Ouyang Prashant Singh Ranran Su Duane D.Johnson Matthew J.Kramer John h.Perepezko Oleg N.Senkov Daniel Miracle Jun Cui Division of Materials Science and Engineering Ames LaboratoryAmesIA 50011USA Department of Materials Science and Engineering University of Wisconsin-MadisonMadisonWI 53706USA Department of Materials Science and Engineering Iowa State UniversityAmesIA 50011USA Air Force Research Laboratory Materials and Manufacturing DirectorateWright-Patterson Air Force BaseDaytonOH 45433USA

Refractory multi-principal-element alloys(RMPEAs)exhibit high specific strength at elevated temperatures(T).however,current RMPEAs lack a balance of room-temperature(RT)ductility,high-T strength,and high-T creep *** density-functional theory methods,we scanned composition space using four criteria:(1)formation energies for operational stability:-150higher strength found via interstitial electron density with Young’s moduli E>250 GPa;(3)inverse Pugh ratio for ductility:G/Bhigh melting points:T_(m)>2500°*** rapid bulk alloy synthesis and characterization,we validated theory and down-selected promising alloy compositions and discovered Mo72.3W12.8Ta10.0Ti2.5Zr2.5 having well-balanced RT and high-T mechanical *** alloy has comparable high-T compressive strength to well-known MoNbTaW but is more ductile and more creep *** is also superior to a commercial Mo-based refractory alloy and a nickel-based superalloy(haynes-282)with improved high-T tensile strength and creep resistance.

关键词： creep alloy alloys