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The possible source of uranium mineralization in felsic volcanic rocks,eastern Desert,Egypt of the Arabian-Nubian Shield:Constraints from whole-rock geochemistry and spectrometric prospection

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Acta Geochimica 2021年第5期40卷 819-845页

作者： Gehad.m.Saleh bahaa.m.Emad Ibrahim.b.Abdel Kader Rania.m.Sakr Nuclear materials Authority El MaadiP.O.Box 530CairoEgypt

The present work deals with the detailed geology,mineralogy,geochemistry,and spectrometric prospection of the felsic volcanic rocks at the eastern Desert,Egypt of the Arabian-Nubian *** volcanic rocks are an essential source for rare earth elements(REEs)and uranium occurrences in this *** are compositionally uniform with tholeiitic to calc-alkaline affinities,peraluminous and belong to the series of rhyolite with high-K *** exhibit more enrichment in high field strength elements(HFSE,***,ta,Nd,Th,and u)and large-ion lithophile elements(LILE,*** and Rb)com.a.ed to the country rocks of the studied area,with REE ranging from 188.20 to 442.70 ppm.a.d strong depletion in Ti,Sr,P with deep negative Eu *** felsic volcanic rocks were mostly generated from the partial melting of quartz-amphibolite facies accreted during the *** oddities of Zr-u-Th for the felsic volcanic rocks determine the involvement of crustal *** volcanic rocks are found in A-type suites of magma and represent highly fractionated rocks derived from rhyolitic magma,with insignificant interaction with continental crust in the low-pressure environment and during fractional *** volcanic rocks have higher values of radioactivity in which eu range from 0.5 to 121 ppm.a.d eTh from 1.0 to 415.10 *** high values of eu and eTh can be ascribed to the mineralization of uranium.a.d the presence of accessory minerals of radiogenic nature such as uranophane,uranothorite,zircon,and *** is considered as the mineral with most enriched uranium contents in the studied felsic volcanic rocks in which(uO2=87.30 wt%).Also,they are enriched with REE-bearing accessory minerals comprising allanite,titanite,and *** geological investigations of the felsic volcanic rocks in the studied areas are inappropriate to clear the feasible economic potentialities of rare earth elements and u occurrences;itemized and invaluable

关键词： Felsic volcanic rocks Geochemistry REE uranium mineralization Egypt Arabian-Nubian Shield

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血清干细胞因子和白介素-3对结肠直肠癌的诊断价值

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世界核心医学期刊文摘（胃肠病学分册） 2005年第10期1卷 9-10页

作者： mroczko b. Szmitkowski m. Wereszczyńska-Siem.a.kowska u. Okulczyk b 张诗峰 Department of biochemical Diagnostics Medical Academy M. Sklodow ska-Curie 24A 15-276 Bialystok Poland Dr.

For a long time markers that can detect a malignant cell transformation as ear ly as possible have been sought. Substances which have been discovered are known as tumor markers. Stem cell factor (SCF) and interleukin 3 (IL-3) are members of a group of glycoprotein growth factors called hematopoietic cytokines (HCs). These factors take part in the regulation of developmental processes of hematopo ietic progenitor cells and it was proved that HCs can be produced by different c ancer cells, including colorectal cancer. The aim of this study was to investiga te a potential role for SCF and IL-3 as tumor markers for colorectal cancer. We com.a.ed the serum levels of SCF and IL-3 in colorectal cancer patients with t hose in healthy subjects (control group) and commonly accepted tumor markers, su ch as carcinoembryonic antigen (Cea) and carbohydrate antigen 19-9 (CA 19-9). We defined the diagnostic sensitivity, specificity, positive predictive value, n egative predictive value, and receiver-operating characteristics (ROC) curve of tested substances. SCF and IL-3 were determined using enzyme-linked immunosor bent assay (ELISA). Cea and CA 19-9 were m.a.ured by microparticle enzyme immun oassay. The serum levels of HCs and tumor markers were investigated in 75 patien ts with colorectal cancer and in 40 healthy subjects. There were significant differences in the level of circulating SCF and IL-3 in the color ectal cancer patients com.a.ed to the control group. moreover, the diagnostic se nsitivity of SCF was higher than the sensitivity of Cea and CA 19-9. The SCF ar ea under the ROC curve was larger than the IL-3 area but smaller than the Cea a nd CA 19-9 areas. The diagnostic specificities of cytokines were lower than tho se of tumor markers, but the combined use of cytokines and tumor markers increas ed the diagnostic values. The highest values of diagnostic parameters were obser ved for the combined use of SCF and CA 19-9. These results suggest a potential role for SCF and

关键词：结肠直肠癌肿瘤标记物干细胞因子生长因子家族癌胚抗原造血祖细胞潜在作用酶免疫分析法酶联免疫吸附法微粒子

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Computational discovery of ultra-strong, stable, and lightweight refractory multi-principal element alloys. Part II: comprehensive ternary design and validation

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npj Computational materials 2023年第1期9卷 1469-1481页

作者： Kate L.m.Elder Joel berry Aurélien Perron brandon bocklund Jibril Shittu Connor J.Rietema Hunter b.Henderson Scott K.mcCall Joseph T.mcKeown materials Science Division Lawrence Livermore National LaboratoryLivermoreCA 94550USA.✉

Here the discovery of refractory multi-principal element alloys(mPeas)with high-temperature strength and stability is pursued within a constrained and application-relevant design space.A comprehensive approach is developed and applied to explore all 165 ternary systems in the Al-Ce-Fe-Hf-mo-Nb-ta-Ti-V-W-Zr family.A subset of ternary systems that contain large areas in composition–temperature space with high strength and robust bCC phase stability is *** sets of high-performing alloys are identified,each set optimized for one combination of phase constraint,optimization target,and temperature *** mechanical tests support the viability of the *** work highlights the importance of considering phase stability,exploring non-equiatomic regions of composition space,and applying application-relevant *** I and II provide three down-selection techniques for identifying high-performing bCC refractory mPeas,design guidelines,and many candidates predicted to have bCC phase stability and strengths 2–3 times higher than any reported to date.

关键词： alloys element ternary

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A Com.a.ative Study on Rat Intestinal Epithelial Cells and Resident Gut bacteria (ii) Effect of Arsenite

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biomedical and Environmental Sciences 2006年第2期19卷 77-86页

作者： RAJ K.uPRETI A.KANNAN RICHA SHRIVAStaVA u.C.CHATuRVEDI biomembrane Toxicology Laboratory Industrial Toxicology Research Centre M. G. Marg P. B. No. 80 Lucknow-226001 India

Objective In order to use facultative gut bacteria as an alternate to animals for the initial gastrointestinal toxicity screening of heavy metals, a com.a.ative study on rat intestinal epithelial cells and resident gut bacteria was undertaken. methods in vitro growth rate of four gut bacteria, dehydrogenase （DHA） and esterase （ea） activity test, intestinal epithelial and bacterial cell membrane enzymes and in situ effect of arsenite were analysed. Results Growth profile of mixed resident population of gut bacteria and pure isolates of Escherichia coli, Pseudomonas sp., Lactobacillus sp., and Staphylococcus sp. revealed an arsenite （2-20 ppm） concentration-dependent inhibition. The viability pattern of epithelial cells also showed similar changes. DHA and ea tests revealed significant inhibition （40%-72%） with arsenite exposure of 5 and 10 ppm in isolated gut bacteria and epithelial cells. Decrease in membrane alkaline phosphatase and Ca^2＋-mg^2＋-ATPase activities was in the range of 33%-55% in four bacteria at the arsenite exposure of 10 ppm, whereas it was 60%-65% in intestinal epithelial villus cells, in situ incubation of arsenite using intestinal loops also showed more or less similar changes in membrane enzymes of resident gut bacterial population and epithelial cells. Conclusion The results indicate that facultative gut bacteria can be used as suitable in vitro model for the preliminary screening of arsenical gastrointestinal cytotoxic effects.

关键词： Arsenic Gut microflora Intestinal bacteria Intestinal epithelial cells membrane enzymes GI-toxicity

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Phase Evolution and magnetic Studies of La and Refractory metals Co-substituted α-Fe/R_2Fe_(14)b-type Nanocomposites

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Journal of materials Science & Technology 2000年第2期16卷 102-106页

作者： W. C. Changt, S.H. Wang, S.J. Chang and m. Y. Tsai (Department of Physics, Chung Cheng university, ming-Hsiung, Chia-Yi, 621, taiwan-China Q.Chen) (Rhodia Inc., Rare earths and Gallium, CN 7500, Cranbury, New Jersey 08512, u.S.A.) Department of Physics Chung Cheng University Ming-Hsiung Chia-Yi 621 Taiwan Rhodia Inc. Rare Earths and Gallium CN 7500 Cranbury NJ 08512 United States

Phase evolution and magnetic properties of (Nd_o.95La_0.05)9.5-11Febal.m_2b10.5. where m=Cr, Ti, Nb, V, mo, Zr, Hf, ta, mn or W, melt spun ribbons have been investigated. Almost all the alloy ribbons. except for(Nd_0.95La_0.05)_9.5Fe_78m_2b_10.5(m=mo and mn),consist merely two magnetic phases, namely α-Fe and R_2Fe_14b, which display a better combination of _iH_c and magnetic energy product. Remanence (br) and coercivity (i_H_c) values in the range of 8.0 to 9.1 kG and 9.5 to 18.9 kOe. respectively, can be achieved. Among compositions studied, the Ti and W-substitutions were found to be most effective in increasing the br and i_H_c, respectively. For a fixed refractory metal substitution, namely, m=C_r, Ti or Nb, an increase in the total rare earth concentration resulted in nanocomposites of small grain sizes and a high volume fraction of the R_2Fe_14b phase, leading to an increase in the magnetic properties.

关键词： Fe/R2Fe b-type Nanocomposites Phase Evolution and magnetic Studies of La and Refractory metals Co-substituted type La

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Simple Characteristics Estimation methods of material and molecule Electronic Structure

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材料科学与工程（中英文b版） 2012年第4期2卷 261-268页

作者： m.Y. Dolomatov D.O. Shulyakovskaya G.R. mukaeva G.u. Jarmuhametova K.F. Latypov ufa State Academy of Economics and Service Department of Physics 145 Chernyshevskiy St. Ufa 450077 Russian Federation

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EFFECTS OF ALLOYING ELEmENTS ON CREEP OF TiAl ALLOYS WITH FINELAmELLAR STRuCTuRES

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中国有色金属学会会刊：英文版 1999年第S1期9卷 263-273页

作者： J.N.Wang, b.Y.Huang and T.G.Nieh  National Key Laboratory for Powder metallurgy, Central South university of Technology, Changsha 410083, China  Lawrence Livermore National Laboratory, P.O.box 808, Livermore, CA 94550, u.S.A.

Creep experiments have been conducted on five powder metallurgy TiAl alloys with fine grains (65～80 μm), fine lamellar spacings (0.1～0.16 μm), and different compositions [Ti 47Al(+Cr, Nb, ta, W, Si)] at temperatures of 760 ℃ and 815 ℃ and stresses from 35 to 723 m.a. Results show that at a given lamellar spacing 1% Nb(mole fraction) with 1% ta and replacing 0.2% ta with 0.2% W induced little effect, but addition of 0.3% Si decreased the creep resistance by a factor of 3～4 under otherwise identical conditions. These different effects of different alloying elements are interpreted in terms of the interaction of alloy segregants with misfit and/or misorientaion dislocations at the lamellar interface. That is, the interaction retards or facilitates the climb of interfacial dislocations, which is rate controlling during creep, depending on the size of the segregants relative to the host atoms.

关键词： TiAl alloys fine lamellar structures creep alloying elements

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Performance and calibration of quark/gluon-jet taggers using 140 fb^(-1) of pp collisions at √s=13 TeV with the ATLAS detector

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Chinese Physics C 2024年第2期48卷 1-25页

作者： G. Aad b. Abbott K. Abeling N.J. Abicht S.H. Abidi A. Aboulhorma H. Abramowicz H. Abreu Y. Abulaiti b.S. Acharya C. Adam bourdarios L. Adamczyk S.V. Addepalli m.J. Addison J. Adelman A. Adiguzel T. Adye A.A. Affolder Y. Afik m.N. Agaras J. Agarwala A. Aggarwal C. Agheorghiesei A. Ahmad F. Ahmadov W.S. Ahmed S. Ahuja X. Ai G. Aielli A. Aikot m. Ait tamlihat b. Aitbenchikh I. Aizenberg m. Akbiyik T.P.A. Åkesson A.V. Akimov D. Akiyama N.N. Akolkar K. Al Khoury G.L. Alberghi J. Albert P. Albicocco G.L. Albouy S. Alderweireldt m. Aleksa I.N. Aleksandrov C. Alexa T. Alexopoulos F. Alfonsi m. Algren m. Alhroob b. Ali H.m.J. Ali S. Ali S.W. Alibocus m. Aliev G. Alimonti W. Alkakhi C. Allaire b.m.m. Allbrooke J.F. Allen C.A. Allendes Flores P.P. Allport A. Aloisio F. Alonso C. Alpigiani m. Alvarez Estevez A. Alvarez Fernandez m. Alves Cardoso m.G. Alviggi m. Aly Y. Amaral Coutinho A. Ambler C. Amelung m. Amerl C.G. Ames D. Amidei S.P. Amor Dos Santos K.R. Amos V. Ananiev C. Anastopoulos T. Andeen J.K. Anders S.Y. Andrean A. Andreazza S. Angelidakis A. Angerami A.V. Anisenkov A. Annovi C. Antel m.T. Anthony E. Antipov m. Antonelli F. Anulli m. Aoki T. Aoki J.A. Aparisi Pozo m.a. Aparo L. Aperio bella C. Appelt A. Apyan N. Aranzabal S.J. Arbiol Val C. Arcangeletti A.T.H. Arce E. Arena J-F. Arguin S. Argyropoulos J.-H. Arling O. Arnaez H. Arnold G. Artoni H. Asada K. Asai S. Asai N.A. Asbah J. Assahsah K. Assamagan R. Astalos S. Atashi R.J. Atkin m. Atkinson H. Atmani P.A. Atmasiddha K. Augsten S. Auricchio A.D. Auriol V.A. Austrup G. Avolio K. Axiotis G. Azuelos D. babal H. bachacou K. bachas A. bachiu F. backman A. badea P. bagnaia m. bahmani A.J. bailey V.R. bailey J.T. baines L. baines O.K. baker E. bakos D. bakshi Gupta V. balakrishnan R. balasubramanian E.m. baldin P. balek E. ballabene F. balli L.m. baltes W.K. balunas J. balz E. banas m. bandieramonte A. bandyopadhyay S. bansal L. barak m. barakat E.L. barberio D. barberis m. barbero m.Z. barel K.N. barends T. barillari m-S. barisits T. barklow P. baron D.A. baron mo The ATLAS Collaboration

The identification of jets originating from quarks and gluons,often referred to as quark/gluon tagging,plays an important role in various analyses performed at the Large Hadron Collider,as Standard model m.a.urements and searches for new particles decaying to quarks often rely on suppressing a large gluon-induced *** paper describes the m.a.urement of the efficiencies of quark/gluon taggers developed within the ATLAS Collaboration,using √s=13 TeV proton–proton collision data with an integrated luminosity of 140 fb^(-1) collected by the ATLAS *** taggers with high performances in rejecting jets from gluon over jets from quarks are studied:one tagger is based on requirements on the number of inner-detector tracks associated with the jet,and the other combines several jet substructure observables using a boosted decision tree.A method is established to determine the quark/gluon fraction in data,by using quark/gluon-enriched subsamples defined by the jet *** in tagging efficiency between data and simulation are provided for jets with transverse momentum between 500 GeV and 2 TeV and for multiple tagger working points.

关键词： ATLAS JET QuARK GLuON taGGING

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Clarifying sub-genomic positions of QTLs for flowering habit and fruit quality in u.S. strawberry (Fragaria×ananassa) breeding populations using pedigree-based QTL analysis

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Horticulture Research 2017年第1期4卷 85-93页

作者： Sujeet Verma Jason D Zurn Natalia Salinas megan m mathey beatrice Denoyes James F Hancock Chad E Finn Nahla V bassil Vance m Whitaker IFAS/Department of Horticulture University of FloridaGulf Coast Research and Education Center14625 CR 672Wimauma33598FLUSA uSDA-ARS National Clonal Germplasm Repository 33447 Peoria RoadCorvallis97333ORUSA Department of Horticulture Oregon State University4017 Agriculture and Life Sciences BuildingCorvallis97331ORUSA Department of Horticulture UMR 1332 Biologie du Fruit et PathologieINRAUniv.BordeauxVillenave d’OrnonF-33140France michigan State university East Lansing48824MIUSA uSDA-ARS HCRU3420 NW Orchard AvenueCorvallis97330ORUSA

The cultivated strawberry(Fragaria×ananassa)is consumed worldwide for its flavor and nutritional *** analysis of commercially important traits in strawberry are important for the development of breeding methods and tools for this *** several quantitative trait loci(QTL)have been previously detected for fruit quality and flowering traits using low-density genetic maps,clarity on the sub-genomic locations of these QTLs was *** discoveries in allo-octoploid strawberry genomics led to the development of the IStraw90 single-nucleotide polymorphism(SNP)array,enabling high-density genetic maps and finer resolution QTL *** this study,breeder-specified traits were evaluated in the eastern(michigan)and Western(Oregon)united States for a common set of breeding populations during 2 *** QTLs were validated for soluble solids content(SSC),fruit weight(FWT),pH and titratable acidity(ta)using a pedigree-based QTL analysis *** fruit quality,a QTL for SSC on linkage group(LG)6A,a QTL for FWT on LG 2bII,a QTL for pH on LG 4CII and two QTLs for ta on LGs 2A and 5b were *** addition,a large-effect QTL for flowering was detected at the distal end of LG 4A,coinciding with the FaPFRu *** haplotype analysis in the FaPFRu region indicated that the homozygous recessive genotype was highly predictive of seasonal *** probes in the FaPFRu region may help facilitate marker-assisted selection for this trait.

关键词： breeding straw Fragaria

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地方高校志愿服务现状及教育对策

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云梦学刊 2014年第5期35卷 110-114页

作者：徐丹湖南理工学院信息与通信工程学院湖南岳阳414006

随着"90后"大学生的个性化及新媒体等大环境的影响,我国地方高校志愿服务工作面临新的挑战。当前,志愿服务动机中信念与功利并存、志愿服务意愿中现实与理想矛盾、志愿服务管理中持续与松散矛盾。因此,应从志愿服务动机人性化、志愿服... 详细信息

随着"90后"大学生的个性化及新媒体等大环境的影响,我国地方高校志愿服务工作面临新的挑战。当前,志愿服务动机中信念与功利并存、志愿服务意愿中现实与理想矛盾、志愿服务管理中持续与松散矛盾。因此,应从志愿服务动机人性化、志愿服务意愿理性化及志愿服务管理精细化着力,促进地方高校志愿服务的健康发展。

关键词：地方高校志愿服务现状对策

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