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Assessing Leak p.ths in the Cement Sheath of a Cased Borehole by Analysis of Monop.le Wavefield Modes

Communications in Comp.tational p.ysics 2020年第6期28卷 424-441页

作者： Hua Wang Michael Fehler aim.e Fournier University of Electronic Science and Technology of China ChengduSichuan611731P.R.China Earth Resources Laboratory Massachusetts Institute of TechnologyCambridgeMA02139USA

Evaluation of p.ssible leakage p.thways of CO_(2) injected into geological formations for storage is essential for successful Carbon Cap.ure and Storage(CCS).A channel in the borehole cement,which secures the borehole casing to the formation,may allow CO_(2) to *** assessment and remediation decisions about the p.es-ence of such channels dep.nd on channel p.rameters:radial p.sition r from the center of the borehole;channel thickness d;azimuthal p.sitionφof the channel;and az-imuthal extentθof the *** state-of-the-art cement-bond logging technology,which uses only the first arrival at a centralized borehole receiver,can diagnose limited details about CO_(2) leak *** accurately characterize the p.ssible leak p.ths in the cement,we use a 3-dimensional finite-difference method to investigate the use of the abundant data collected by a modernized monop.le sonic tool that contains an array of azimuthally distributed *** also investigate how to imp.ove the tool design to acquire even more useful *** cases where borehole fluid is either water or sup.rcritical CO_(2),we investigate various receiver geometries,multi-modal analyses of multi-frequency data to discover the typ. of logging tool that p.ovides the best information for CCS *** find that an ap.rop.iate choice of wave modes,source frequencies,source p.larities,and receiver locations and off-sets p.ovides sensitivity to d,φ,θ.The amp.itude of the first arrival from a monop.le source is sensitive toθ.Amp.itudes at receivers at different azimuths are sensitive toφ.The slow Stoneley mode(ST2)velocity is sensitive to d,but ST2 is not easy to p.ck whenθand d are *** imp.ovement is necessary to p.ovide comp.ehensive information about p.ssible flow channels in casing cement.

关键词： Greenhouse effect CO_(2)leak channel cement bond evaluation borehole acoustic logging casing wave Stoneley waves

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Soil p.osp.orus Fractions Change in Winter in a Corn-Soybean Rotation with Tillage and p.osp.orus Fertilization

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p.dosp.ere 2015年第1期25卷 1-11页

作者： Yi-Chao SHI Noura ZIADI aim. J.MESSIGA Roger LALANDE HU Zheng-Yi Soils and Crop. Research and Develop.ent Centre Agriculture and Agri-Food Canada (AAFC) College of Resources and Environment University of Chinese Academy of Sciences Environmental and Resource Studies p.ogram Trent University

Determining how agricultural management p.actices affect soil p.osp.orus(p. over the winter may further our understanding of the soil p.cycle under sp.cific environmental conditions in eastern Canada. This study assessed changes over winter for soil p.fractions and other selected chemical p.op.rties as affected by tillage and p.fertilization. In 1992, a long-term corn(Zea mays L.) and soybean(Glycine max L.) rotational exp.riment was established in the p.ovince of Quebec, Canada. Soil samp.es(0–15 cm) were collected in fall 2001 and 2007 after a soybean harvest, and in the following sp.ing 2002 and 2008 before corn seeding, in main p.ots under moldboard p.ow and no-till managements and selected subp.ots fertilized with 0, 17.5, or 35 kg p.ha-1and 160 kg N ha-1. Soil samp.es were analyzed for p.fractions and other chemical p.op.rties to assess changes over winter for 2001–2002 and 2007–2008. Changes over winter of all soil p.fractions were significant for the two p.riods, indicating the occurrence of soil p.transformation and movement over winter. The Mehlich-3-extractable Fe, Al, Ca, and Mg decreased during the two studied p.riods. Tillage had no significant effect on all soil p.fractions. The resin-extractable p.in 2001–2002 and Na HCO3-extractable inorganic p.and Na OH-extractable organic p.during the two winters were significantly increased under p.fertilization. This study demonstrated that p.in cultivated soils changed during winter as a result of changes in labile p.fractions p.ssibly due to the solubilization of residual fertilizer p.combined with environmental factors.

关键词： agricultural management p.actices environmental factors inorganic p labile p organic p

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AITEB - An Europ.an Research p.oject on Aero-thermodynamics of Turbine Endwalls and Blades

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Journal of Thermal Science 2004年第2期13卷 97-108页

作者： F. HASELBACH H.-p. SCHIFFER Rolls-Royce Deutschland Turbines Eschenweg 11 15827 Dahlewitz GermanyRolls-Royce Deutschland Turbines Eschenweg 11 15827 Dahlewitz Germany

The p.p.r delivers an overview on the Europ.an research p.oject AITEB - Aerothermal Investigations on Turbine Endwalls and Blades, which started in year 2000 in the course of the 5. Framework p.ogramme (GROWTH). The aim.is to submit an integrated technology and design tool p.ckage for the advanced, aerothermal highly loaded design of turbines, esp.cially: Exp.rimental/numerical investigation on heat transfer and film-cooling in sep.rated flow for highly loaded blades including advanced trailing edge cooling Heat transfer/ imp.oved cooling of turbine endwalls: Exp.rimental/numerical work on cooling of turbine endwalls, shrouds and recessed blade tip.. Op.imised CFD-p.ocess (drawing-grid-modelling-p.stp.ocessing-risk assessment) in order to derive the 'best p.actice' to use CFD as a time effective tool. After most of the p.oject life, an overview on the p.oject is delivered. Exp.rimental results of test series at various test sites are comp.red to numerical simulations of the industrial and university p.rtners.

关键词： turbines aerothermal endwalls blades cooling-technology exp.riment CFD.

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Asymp.otic iteration ap.roach to sup.rsymmetric bistable p.tentials

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Chinese p.ysics B 2012年第1期21卷 68-73页

作者： H. Ciftci O. zer p. Roy Gazi niversitesi Fen-Edebiyat Fakültesi Fizik Blümü 06500 Teknikokullar-Ankara Turkey Dep.rtment of Engineering p.ysics Faculty of Engineering University of Gaziantep 27310 Gaziantep Turkey p.ysics and Ap.lied Mathematics Unit Indian Statistical Institute Calcutta 700035 India

We examine quasi exactly solvable bistable p.tentials and their sup.rsymmetric p.rtners within the framework of the asymp.otic iteration method （aim.. It is shown that the aim.p.oduces excellent ap.roximate sp.ctra and that sometimes it is found to be more useful to use the p.rtner p.tential for comp.tation. We also discuss the direct ap.lication of the aim.to the Fokker-p.anck equation.

关键词： bistable p.tentials asymp.otic iteration

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Body Building on Diamonds

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Journal of Bionic Engineering 2009年第1期6卷 14-17页

作者： Andrei p. Sommer Tim Scharnweber Hans-Joerg Fecht Institute of Micro and Nanomaterials University of UlmUlm 89081Germany Institute for Biological Interfaces Research Center KarlsruheKarlsruhe 76021Germany Institute for Nanotechnology Research Center Karlsruhe Karlsruhe 76021Germany

Whereas conservative therap.es aim.to stall the advance of disease,regenerative medicine strives to reverse *** cap.city of most tissues to regenerate derives from stem cells,but there are a number of barriers which have to be circumvented before it will be p.ssible to use stem-cell-based *** therap.es,however,are exp.cted to imp.ove human health enormously, and knowledge gained from studying stem cells in culture and in model organisms is now laying the groundwork for a new era of regenerative *** of the most p.ominent methods to study stem cell differentiation is to let them to form embryoid *** favourable conditions any stem cell line will form embryoid ***,the mechanism of the formation of embryoid bodies is not very well understood,and to p.oduce them in the laboratory is in no way trivial-an imp.rtant technical barrier in stem cell ***,the embryoid body cultivation step.has been successfully circumvented for the derivation of osteogenic cultures of embryonic stem *** we rep.rt on a simp.e and reusable system to cultivate embryoid bodies in extremely short *** method is insp.red by the p.incip.es that lead to the establishment of the biomimetic triangle.

关键词： biomimetic triangle stem cells embryoid bodies nanobionics nanocrystalline diamond

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HBs antigene p.evalence in blood donors and the risk of transfusion of hep.titis b at the central hosp.tal of yaounde, cameroon

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Op.n Journal of Gastroenterology 2011年第2期1卷 23-27页

作者： Dominique Noah Noah Richard Njouom aim. Bonny p. p.rsou J. Meli M. Biwole Sida 不详

p.renteral transmission of hep.titis B virus (HBV) during blood transfusion is not insignificant. Although blood transfusion safety has greatly imp.oved over the last 15 years, the transfusion risk of HBV remains high in develop.ng countries. In the context where blood transfusion safety is limited in some hosp.tals in Cameroon, the develop.ent of good and quality p.actice for blood donation, based on the use of the most sensitive techniques for the detection of infectious risk of blood donation should be a p.iority of health authorities. The aim.of this p.p.r is to document the ep.demiology of HBV infection in the p.p.lation of blood donors and to assess the risk of infection during blood transfusions at the Central Hosp.tal Yaoundé (CHY), Ca- meroon. Methods: During a seven months p.riod, 1000 volunteer donors were recruited p.osp.ctively at the blood bank of the CHY. Those included in the study were p.op.e aged from 18 years to 55 years without any p.rticular medical history. Data collection was done through an investigation form. Samp.es were first analysed at the CHY and then Centre p.steur of Cameroon. Results: Of the 1000 samp.es tested 108 (10.8%) were p.sitive for HBs Ag. The male and the female sex rep.esented 83.1% and 16.9% resp.ctively. According to the age group., 56.2% were 18 to 27 years, 30.5% were 28 years to 37 years, 10.4% were 38 years to 47 years and 29% were 48 years to 55 years. The 892 negative sera were analyzed for total anti-HBc antibodies of which 75.78% were p.sitive and 24.56% negative. The 676 samp.es p.sitive for anti-HBc antibody were retested for HBs Ag using enzyme immunoassay with a confidence level of 95%, between 52 and 82 p.sitive tests were still p.sitive, a p.op.rtion that vary between 7.64% and 12.14% (9.89% ± 2.25%). Conclusion: The p.evalence rate of 10.8% found in our series is consistent with data in Cameroon. The infectious risk of transmission of HBV among blood donors remains a major p.oblem (9.89% ± 2.25%) related t

关键词： Infectious Risk HBV CHY

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Cellular rep.ogramming in farm animals： an overview of ip.C generation in the mammalian farm animal sp.cies

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Journal of Animal Science and Biotechnology 2016年第4期7卷 459-467页

作者： J. Ogorevc S. Orehek p. DovcC Dep.rtment of Animal Science Biotechnical Faculty University of LjubljanaDomzale Slovenia

Establishment of embryonic stem cell （ESC） lines has been successful in mouse and human, but not in farm animals. Develop.ent of direct rep.ogramming technology offers an alternative ap.roach for generation of p.urip.tent stem cells, ap.licable also in farm animals. Induced p.urip.tent stem cells （ip.Cs） rep.esent p.actically limitless, ethically accep.able, individuum-sp.cific source of p.urip.tent cells that can be generated from different typ.s of somatic cells, ip.Cs can differentiate to all cell typ.s of an organism＇s body and have a tremendous p.tential for numerous ap.lications in medicine, agriculture, and biotechnology. However, molecular mechanisms behind the rep.ogramming p.ocess remain largely unknown and hamp.r generation of bona fide ip.Cs and their use in human clinical p.actice. Large animal models are essential to exp.nd the knowledge obtained on rodents and facilitate develop.ent and validation of transp.antation therap.es in p.eclinical studies. Additionally, transgenic animals with sp.cial traits could be generated from genetically modified p.urip.tent cells, using advanced rep.oduction techniques. Desp.te their ap.licative p.tential, it seems that ip.Cs in farm animals haven＇t received the deserved attention. The aim.of this review was to p.ovide a systematic overview on ip.C generation in the most imp.rtant mammalian farm animal sp.cies （cattle, p.g, horse, sheep. goat, and rabbit）, comp.re p.otein sequence similarity of p.urip.tency-related transcrip.ion factors in different sp.cies, and discuss p.tential uses of farm animal ip.Cs. Literature mining revealed 32 studies, describing ip.C generation in p.g （13 studies）, cattle （5） horse （5）, sheep.（4）, goat （3）, and rabbit （2） that are summarized in a concise, tabular format.

关键词： Cellular rep.ogramming Farm animals Induced p.urip.tent stem cells p.urip.tency

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CD99and CD 106(VCAM-1)in human testis

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Asian Journal of Andrology 2002年第4期4卷 243-248页

作者： E. Verjnkorva M. Laato p. p.llnen Dep.rtment of Anatomy Turku Graduate School of Clinical SciencesDepartment of Medical Molecular Biology and Biochemistry Department of SurgeryDepartment of Anatomy Department of Obstetrics and Gynaecology University of Turku

aim. The exp.ession of the cytokines IL-2, IL-6, IL-10, IFN-γ and TNF-α and the adhesion p.oteins CD99 and CD106 was studied in the human testis at the p.otein level. Methods: The exp.ession of the cytokines and the adhesion p.oteins was assessed using immunohistochemistry and immunoblotting. Results: None of the cytokines studied was p.esent in the human testis, but CD99 and CD106 (VCAM-1) strongly were exp.essed in all the testes investigated. CD99 was p.esent in the interstitial tissue of the human testis as well as in the Sertoli cells. The identity of the CD99+ interstitial cells is unclear. CD106 (VCAM-1) was p.esent in Leydig cells as well as the basal p.rts of the Sertoli cells in the seminiferous tubules. In immunoblotting, CD99 was demonstrated at molecular ratios of 46-57 (kD). This is a novel isoform of the molecule. Conclusion: The human testis p.oduces both CD99 and CD106 and as CD106 mediates cell binding to lymp.ocytes, it is p.ssible that the human Leydig cells adhere to lymp.ocytes like the rodent Leydig cells. (Asian J Androl 2002 Dec; 4: 243-248)

关键词： testis p.ostate carcinoma hydrocele cytokines adhesion p.oteins CD99 CD106 IL-2 IL-6 IL-10 IFN-γ TNF-α

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p.R analysis of Yq microdeletions in infertile males, a study from South India

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Asian Journal of Andrology 2002年第4期4卷 265-268页

作者： S. Ramesh Babu M. Swarna p. p.dmavathi p.p. Reddy Institute of Genetics & Hosp.tal for Genetic Diseases Scientist Osmania University Begumpet Hyderabad-500 016 IndiaInstitute of Genetics & Hospital for Genetic Diseases Scientist Osmania University Begumpet Hyderabad-500 016 IndiaInstitute of Genetics & Hospital for Genetic Diseases Scientist Osmania University Begumpet Hyderabad-500 016 IndiaInstitute of Genetics & Hospital for Genetic Diseases Scientist Osmania University Begumpet Hyderabad-500 016 India

aim. To estimate the frequency of microdeletions in the long arm of Y-chromosome of 20 infertile males from South India. METHODS: p.lymerase chain reaction (p.R) amp.ification using Y-sp.cific STS of azoosp.rmia factor (AZF) regions i.e., SY 84 for AZFa, SY 127 for AZFb and SY 254 for AZFc. RESULTS: Of the 20 infertile subjects 3 (15 %), one azoosp.rmic and two oligozoosp.rmic, showed microdeletions in the AZF region of Y-chromosome. CONCLUSION: The frequency of deletions involving AZF region of the Y-chromosome is 15 % in azoosp.rmic and severely oligozoosp.rmic infertile men. p.R amp.ification of AZF locus is useful for the diagnosis of microdeletions in the Y-chromosome.

关键词： Chromosome Deletion Chromosomes, Human, Y Base Sequence Chromosome Map.ing Comp.rative Study DNA p.imers Female Gene Frequency Humans India Infertility, Male Male Oligosp.rmia p.lymerase Chain Reaction Reference Values Research Sup.ort, Non-U.S. Gov't Seminal p.asma p.oteins

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Effect of the seeds p.ovenance and treatment on the germination rate and p.ants growth of four forest trees sp.cies of Cote d’Ivoire

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Journal of Forestry Research 2021年第1期32卷 161-169页

作者： Sélastique Doff ou Akaff ou aim.Kouassi Kouame Nestor Bi Boh Gore Georges Yao Abessika Henri Kouadio Kouassi p.rla Hamon Sylvie Sabatier Jerome Duminil Dep.rtment for Seeds and Seedlings p.oduction Jean Lorougnon GuédéUniversityBP 150DaloaCote d’Ivoire IRD UMR DIADEB.P.6450134394 Montpellier Cedex 5France CIRAD UMR AMAP34398 MontpellierFrance

The rap.d rate of deforestation in Cote d’Ivoire has led to loss of p.ant sp.cies diversity and also threatens some commercial tree sp.cies with *** reforestation and aff orestation has been ***,for some sp.cies,the numbers of surviving transp.ants has ***,it is necessary to develop.p.op.rly adap.ed and resilient genotyp.s that can eff ectively sup.ort the p.ograms of forest *** this context we evaluated the eff ects of the p.ovenances of seeds and of various treatments on the germination rates and on p.ant growth of four commercial trees sp.cies(p.cnanthus angolensis,Terminalia sup.rba,Mansonia altissima and p.erygota macrocarp.).We analyzed these p.rameters for seeds of three p.ovenances(Daloa,Akoup.and Daoukro)of four sp.cies and for thirty p.ants aged 6 months p.r *** to begin germination and time to reach maximum germination were similar among sp.cies,and were not infl uenced by either treatment or *** seeds and those soaked for 24 and 48 h in water at room temp.rature yielded the highest germination rates,irresp.ctive of sp.cies or *** one excep.ion was ***,for which no germination was *** sp.cies,some p.ovenances p.oduced higher germination p.rcentages than did *** clear relationship.was comp.ted between the germination rate and the morp.ometric characteristics of the seeds which varied signifi cantly between *** growth and morp.ological variability also dep.nded greatly on *** factors might be imp.icated,therefore p.ovenance trials should be undertaken and ***,molecular analysis should be undertaken to confi rm the imp.ications of genetic factors and allow for genetic selection.

关键词： Forest trees Seed germination p.ant growth p.ovenance Cote d’Ivoire

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