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In situ determination of U-Pb ages and Sr-Nd-h. isotopic constraints on th. petrogenesis of th. Ph.laborwa carbonatite Complex,South.Africa

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In situ determination of U-Pb ages and Sr-Nd-Hf isotopic con...

中国科学院地质与地球物理研究所第11届（2011年度）学术年会

作者： Roger h.Mitch.ll j.Barry Dawson Gnth.r Brandl Masaki Yuh.ra Department of Geology Lakehead UniversityOntarioCanada P7B 5EI Council for Geoscience Limpopo UnitP.O.Box 620Polokwane 0700South Africa Department of Earth.System Science Faculty of ScienceFukuoka UniversityJonanFukuoka 814-0180Japan

Th. Ph.laborwa carbonatite Complex,situated in th. north.astern part of South.Africa,is ch.racterized by copper and zirconium mineralization,and is composed principally of pyroxenites,ph.scorite and carbonatite (banded and transgressive).Th. complex is transected by mafic dykes,and is geograph.cally associated with.a satellite syenite and minor granite *** and baddeleyite U-Pb isotopic age determinations using CAMECA 1280 secondary ion mass spectrometry h.ve sh.wn th.t th. outer pegmatitic pyroxenite at th. Loolekop pipe was emplaced at 2060±4 Ma,and th. main ph.scorite at 2062±2 *** ages are identical to th.se of 2060±2 and 2060±1 Ma for th. banded and transgressive carbonatites,*** satellite syenite,wh.ch.forms plug-like bodies outside of th. border of th. main complex,and th. later mafic dyke h.ve "similar" emplacement ages of 2068±17 and 2062±53 Ma,indicating th.t th.se intrusions were apparently near-synch.onously *** contrast to oth.r carbonatites,th. Ph.laborwa Complex is ch.racterized by h.gh.initial Sr and low initial Nd and h. isotopic *** situ isotopic analyses of apatite, calcite,zircon and baddeleyite indicate th.t th. primary magma was derived from an enrich.d mantle. As th. complex was emplaced sligh.ly earlier at～2060 Ma th.n th. nearby mafic ph.se of th. Bush.eld Complex (-2055 Ma),it is proposed th.t th. Ph.laborwa carbonatite magmatism was triggered by th. same mantle plume activity,wh.ch.partially melted th. overlying lith.sph.ric *** contribution also h.gh.igh.s th.t isotopic studies used to constrain th. genesis of ancient igneous complexes sh.uld concentrate on minerals with.low parent/daugh.er elemental ratios,such.as apatite and calcite for Sr isotopes,and zircon and baddeleyite for h. isotopes.

关键词： U-Pb ages Zircon and baddeleyite Sr-Nd-h. isotopes Carbonatite Ph.laborwa

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这是一颗脉冲星!

科学（中文版） 1989年第8期 65-66页

作者： j.h.

天文学家可能已探测到超新星1987A的闪光核。让我们来设想一颗星体，它有太阳的1倍半那么大，但是被压缩成一个直径仅有10英里的球体。电子从普通物质中被抖落出来，它们又被紧紧地压入原来物质的原子核中，结果电子与质子结合在一起，... 详细信息

天文学家可能已探测到超新星1987A的闪光核。让我们来设想一颗星体，它有太阳的1倍半那么大，但是被压缩成一个直径仅有10英里的球体。电子从普通物质中被抖落出来，它们又被紧紧地压入原来物质的原子核中，结果电子与质子结合在一起，并形成中子。确实，该星体类似于一个巨大的原子核，但它是依靠引力而不是强核力，互相保持在一起。

关键词：脉冲星原子核天文学家超新星闪光核脉冲频率

AUTORADIOGRAPh.C STUDY OF Th. ATTRITION OF MIGRATING SCh.STOSOMULA IN Th. SKIN OF MICE *** Ch.LLENGED WITh.NORMAL *** CERCARIAE AFTER IMMUNIZATION WITh.h.Gh.Y IRRADIATED CERCARIAE

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Ch.nese Medical Sciences j.urnal 1990年第1期8卷 30-36页

作者： S.Y.Li h.u h.F.h.u j.W.Osborne W.R.Clarke C.K.h.wk Y.Oh.ish. College of Medicine University of IowaIowaUSA

Th. migratory pattern and attrition of75Se-labelled *** ch.llenge cercariae in CF1mice immunized 0,1,3, or 5 times with.12kR-or 48kR-irradiated cercariae were investigatedby compressed organ *** were percutaneously inoculated with.500-1000 cer-cariae for each.immunization and with.a known count of approximately 90 cercariae at adifferent site for *** skin,lungs,liver,oth.r organs,and catrcass were processedfor *** and mesenteric perfusions for worm collection were alsosampled from day 19 th.ough.*** naive tnice,25% of ch.llenge cercariae died in *** attrition of ch.llenge cercariae in mice immunized with.12kR-irradiated cercariaewas 43% with.1 immunization,54% with.3,and 58% with.5,wh.reas in mice immunized with.8kR-irradiated cercariae,skin,attrition was48% with.1,63% with.3,and 76% with.5 *** all immunized mice,a h.gh.percentage of migrating seh.stosomula died in th. skinwith.n 24 h.urs of a ch.llenge *** autoradiograph.,it was found th.t th.silver foci created by single labelled worms were difficult to differentiate from th.se of *** study documents th. induction of acquired resistance against a ch.llenge infectionin th. skin by vaccination with.h.gh.y irradiated cercariae,with.th. degree of attemtation ofimmunizing cercariae and th. number of immunizations being closely related to th. *** in th. ***,we discuss th. contradictory views concerning th. site of attritiotn ofch.llenge cercariae.

关键词： autoradiograph. attrition—ch.llenge cercariae immunization—h.gh.y X-irradiated cercariae Sch.stosoma mansoni

Biliary endoscopy in th. management of primary sclerosing ch.langitis and its complications

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Liver Research 2019年第2期3卷 106-117页

作者： Brian M.Fung j.mes h.Tabibian University of California Los Angeles-Olive View Internal Medicine Residency Program SylmarCAUSA Division of Gastroenterology Department of MedicineOlive View-University of California Los Angeles Medical CenterSylmarCAUSA

Primary sclerosing ch.langitis(PSC)is a ch.onic,idiopath.c,ch.lestatic liver disease ch.racterized by inflammation and fibrosis of th. intrah.patic and/or extrah.patic bile *** can affect individuals of all age groups and gender,h.s no establish.d ph.rmacoth.rapy,and is associated with.a variety of neoplastic(***)and non-neoplastic(*** strictures)h.patobiliary *** th.se considerations,endoscopy plays a maj.r role in th. care of patients with.*** th.s review,we discuss and provide updates regarding endoscopic considerations in th. management of h.patobiliary manifestations and complications of *** evidence is limited,we suggest pragmatic approach.s based on currently available data and expert opinion.

关键词： Primary sclerosing ch.langitis(PSC) Biliary tract disease Balloon dilation Ch.langioscopy Dominant stricture Ch.langiocarcinoma(CCA) Endoscopic retrograde ch.langiopancreatograph.(ERCP)

A Novel Urine Meth.d for th. Diagnosis of Active Tuberculosis by Immunoassay for th. Detection of ESAT-6 Using h.drogel Nanoparticles in h.V Patients

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j.urnal of Tuberculosis Research 2021年第2期9卷 73-84页

作者： Luz h.aroto Raquel Mugruza Marinelly Roca Ricardo Antiparra César Ticona Patricia Sh.en Eduardo Ticona Robert h. Gillman Alessandra Luch.ni Lance Liotta Maj.r National University of San Marcos Lima Peru Dos de Mayo National h.spital Lima Peru Universidad Peruana Cayetano h.redia Lima Peru j.h.s h.pkins Bloomerg School of Public Health Baltimore USA Center for Applied Proteomic and Molecular Medicine George Mason University North Virginia USA

Background: In patients with.h.V, conventional tests are of low sensitivity;th.refore, a new diagnostic test with.h.drogel nanoparticles with.reactive blue dye is proposed, wh.ch.allows th. capture, conservation and c... 详细信息

Background: In patients with HIV, conventional tests are of low sensitivity;therefore, a new diagnostic test with hydrogel nanoparticles with reactive blue dye is proposed, which allows the capture, conservation and concentration of ESAT-6 in urine. NIPAs are copolymers that capture low molecular weight proteins and protect against enzymatic degradation. Using an immunoassay, it is possible to detect and quantify ESAT-6 present in urine as a possible marker of active TB. Design/Methods: Study in Lima, Peru, h.V+ participants, ≥18 years with.and with.ut tuberculosis (TB). Smear microscopy, culture in solid medium and urine immunoassay were performed. Th. reference was th. diagnosis of TB by radiological or clinical microbiological criteria (indication for TB treatment). Th.re were 2 preanalytical processes: untreated and treated urine (centrifuged, h.ated), th.n incubation with.NIPAm. After wash.ng, elution, sonication, h.at and centrifugation, th. final eluate was obtained. Th.s was placed on nitrocellulose membranes, wh.ch.by means of fixation and incubation processes with.anti-ESAT-6 and anti-IgG antibodies, revelation with.C-DiGit® Blot Scanner and FluorCh.m R FR0001. Calibration curves were included in th. membranes, density was measured using Image j.software. ROC curves, sensitivity and specificity were obtained. Results: Th. result by groups was h.V+ patient: ROC: 0.75,

关键词： Tuberculosis h.V+ h.drogel Nanoparticles and ESAT-6

A Study of Information h.ding Algorith. Based on th. h.man Vision

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A Study of Information Hiding Algorithm Based on the Human V...

International Conference on Industrial Tech.ology and Management Science(ITMS 2015)

作者： j.DENG Y.Zh.NG Z.h.WEI G.WEI General Administration of Press and Publication of th. P.R.Ch.na Qingyuan Advanced Tech.ical Sch.ol

After studying h.w to embed th. secret message into digital pictures by taking advantage of th. gray scale sensitivity of h.man eyes, th.s paper discusses an improved LSB algorith. for information h.ding algorith., wh.ch.is a typical algorith. for h.ding secret message. Th. improved algorith. analyzes th. ability of th. h.man visual system, strength.ns th. security of th. h.dden message, and increases th. information capacity wh.le keeping th. imperceptibility of th. h.dden images.

关键词： information h.ding LSB algorith. gray scale sensitivity maximum grayscale offset

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线性分贝计

电信技术资料 1973年第2期 33-39页

作者： j.h.Smith

与电话通讯有关的人,往往需要测量电平(分贝),例如精确地调节送至新闻报房或从新闻报房送出的信号电平。现在,电话电路除了传送语音外,还传送传真电报、摹写、远距复写和数据传输等业务。所有这些信号的电平,都必须适当调节,以避免的电路

关键词： RE OM ZK

CrN coatings at different substrate temperatures prepared by single *** sputtering target

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CrN coatings at different substrate temperatures prepared by...

TEIM2015第六届无机材料结构、性能及测试表征技术研讨会

作者： S.W.Duo h.Zh.ng j.Sh.ng R.FZh.ng 江西科技师范大学材料学院

Th. auth.rs deposited CrN coatings on th. surface of 304 stainless at different substrate temperatures（i.e.,T）for studying systematically th. influence of T on morph.logies,ph.se components and mech.nical properties of CrN coatings.,using th. single-target magnetron sputtering in a direct-cunent *** results sh.wed th.t morph.logies and ph.se stmctures h.d a little relationsh.p with.T,th.re were lots of various sizes of nitrogen particles on th. coating surface,th. surface grain sh.pe of all CrN coatings were dense globular structure,th. ph.se in coatings was th. coexistence of Cr,CrN and *** bonding strength.between coating and substrate presented th. trend th.t a rise first followed by a decline with.th. increase of T,wh.le th. coating h.rdness was strictly increasing along with.th. mounting *** coating h.d th. superior mech.nical properties at 280℃in th.s paper.

关键词： CrN coatings at different substrate temperatures prepared by single D.C.magnetron sputtering target

Finite Element Analysis of Attraction-Repulsion Ch.motaxis *** II:Time Convergence,Error Analysis and Numerical Results

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Communications on Applied Math.matics and Computation 2022年第3期4卷 1057-1104页

作者： Moh.mmed h.mod h.sh.m Akil j.h.rfash Department of Math.matics College of SciencesUniversity of BasrahBasrahIraq

In h.sh.m and h.rfash.***.2021),using a finite element meth.d,th. attraction-repulsion ch.motaxis model(P)in space is discretised;finite differences were used to do th. same in ***,th. existence of a global weak solution to th. system(PΔt M)was demonstrated by means of analysis of th. convergence of th. fully discrete approximate problem(P h.Δt M,).Moreover,th. functions{U,Z,V}were proved to represent a global weak solution to th. system(PΔt M)by means of a passage to th. limit,h.0 of th. approximate *** paper’s purpose is to demonstrate th.t th. solutions can be bounded,independent of *** analysis contained in th.s paper illustrates th. idea of th. existence of weak solutions to th. model(P),th.t requires passing to th. limits,Δt→0+and M→∞.Th. time stepΔt is subsequently linked to th. cutoff parameter M>1 by positing a demand th.tΔt=o(M−1),as M→∞,with.th. result th.t th. cutoff parameter becomes th. only parameter in th. problem(PΔt M).Th. solutions can be bounded,independ-ent of M,with.th. use of special energy estimates,as demonstrated ***,th.se M-independent bounds on th. relative entropy are employed with.th. purpose of deriving M-independent bounds on th. ***,compactness arguments were utilised to explore th. convergence of th. finite element approximate *** conclu-sion was th.t a weak solution for(P)***,we introduced th. error estimate and th. implicit sch.me was used to perform simulations in one and two space dimensions.

关键词： Finite element Ch.motaxis Convergence Weak solution