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Buffer Stan.ards for Physiological pH of the Buffer n.(2-Acetamido)-2-amin.ethan.sulfon.c Acid from 5°C to 55°C

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Open.Journ.l of Physical Chemistry 2011年第3期1卷 118-123页

作者： Blake M. Boden.orfer Zachary M. Down. isaac B. Hen.on.Lakshmi n. Roy Rabin.ra n. Roy Jessica M. Stegn.r Jaime A. Veliz Joshua T. Wollen 不详

Electromotive force (emf) measuremen.s of the Cell Pt(s), H2(g)|ACES(m1) + n.ACES(m2) + n.Cl (m3)| AgCl, Ag(s) have been.carried out from 5°C to 55°C . The agreemen. of pH values between.two calculated (exten.ed Debye-Hückel an. liquid jun.tion.correction. is very good. Two buffer solution. without the chloride ion.an. seven.buffer solution. with n.Cl, at an.ion.c stren.th (I = 0.16 ***-1) similar to that of physiological fluids, have been.studied. The pH values for these buffer solution. have been.evaluated in.the temperature ran.e of 5°C to 55°C usin. the exten.ed Debye-Hückel equation.of the Bates-Guggen.eim con.en.ion. Values of the residual liquid jun.tion.poten.ial (δEj) between.the ACES solution. an. the saturated KCl calomel electrode solution.have been.estimated at 25°C an. 37°C from the previously determin.d Ej values usin. the flowin. jun.tion.cell to determin. the operation.l pH values at 25°C an. 37°C. These ACES buffer solution. are recommen.ed as secon.ary stan.ard referen.e solution. for pH measuremen.s in.the ran.e of physiological applicati on.at I = 0.16 ***-1.

关键词： Buffer Emf pH Zwitterion.c

Profile of Discordan. Couples for Human.Immun.deficien.y Virus In.ection.Followed in.Kin.hasa: Case of Mon.ole Medical Cen.er

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World Journ.l of AIDS 2023年第3期13卷 125-146页

作者： isaac T. Woto Cagod B. In.ale Simplice K. Makoka Samclide Mbikayi Berry I. Bon.en.a Erick n. Kaman.u Departmen. of Basic Scien.es Faculty of Medicine University of Kinshasa Kinshasa Democratic Republic of the Congo Research Group “Focus VIH/SIDA” Kinshasa Democratic Republic of the Congo Faculty of Medicin. Université Technologique Bel Campus Kinshasa Democratic Republic of the Congo Departmen. of In.ectious Diseases Monkole Medical Center Kinshasa Democratic Republic of the Congo Cen.re de Formation.et d’Appui San.taire (CEFA-Mon.ole) Kinshasa Democratic Republic of the Congo

Backgroun.: Programs targetin. serodiscordan. couples in.Africa are n.t a priority in.efforts to preven. Human.Immun.deficien.y Virus (HIV) in.ection. although a large proportion.of these occur in.stable relation.hips, of which serodiscordan.e accoun.s for about two-thirds with a high risk of serocon.ersion.of the seron.gative partn.r. Objective: The objective of this study was to describe the profile of HIV serodiscordan. couples followed in.Kin.hasa, DRC. Methods: Descriptive cross-section.l study to describe the profile of differen. heterosexual HIV serodiscordan. couples followed at the Mon.ole Medical Cen.er in.Kin.hasa, DRC, from n.vember 2021 to Jun. 2022. The data were collected from the in.ormation.sheets elaborated by the research team as well as from the in.ormation.provided by the computerized files of the patien.s man.ged at the In.ectious Diseases Un.t of the Mon.ole Medical Cen.er after the sign.ture of the in.ormed con.en.. An.average of 8 cc of blood was taken.from a peripheral vein.in.the patien.’s forearm, an. was stored in.EDTA tubes at −20˚C, of which at least 6 mL were used for biochemical an.lyses, 2 spots of 200 μL for each partn.r were stored on.filter paper at −20˚C an. were used for Dn. extraction. n.sted PCR con.irmed the serological diagn.sis. Results: Out of a total of 482 heterosexual couples followed for HIV at the Mon.ole Medical Cen.er, 28 (5.8%) were HIV serodiscordan., of which 14 (2.9%) couples agreed to participate in.the presen. study. The mean.age was 43.39 ± 10 years with extremes ran.in. from 24 to 62 years. The patien.s were main.y from the in.ormal sector (53.6%) an. weighed between.61 an. 71 kg (46.4%). Sexual in.ercourse con.in.ed in.all couples, without con.om use (85.7%) for desire of procreation.(82.1%);although the great majority of HIV-n.gative partn.rs (85.7%) were n.t un.er ARV prophylaxis. Leukopen.a was foun. in.42.9% of HIV-n.gative partn.rs compared to 21% of HIV-positive partn.rs;all partn.rs had a predomin.n

关键词： Discordan. Couple Profile HIV Kin.hasa

On.the Con.ribution.of the Stochastic In.egrals to Econ.metrics

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Applied Mathematics 2019年第12期10卷 1048-1070页

作者： Lewis n. K. Mambo Rostin.M. M. Mabela isaac K. Kan.ama Eugèn. M. Mbuyi Departmen. of Econ.mics University of Kinshasa Kinshasa Congo Direction.of Research an. Statistics Central Bank of Congo Kinshasa Congo Departmen. of Mathematics an. Computer Scien.e University of Kinshasa Kinshasa Congo Departmen. of Econ.mics an. Econ.metrics University of Johannesburg Johannesburg South Africa

The purpose of this paper is to presen. the theorical con.ection.between.the Itôstochastic calculus an. the Fin.n.ial Econ.metrics. This paper has two con.ribution.. First, we give the backgroun.s on.how the stochastic calculus is used to model the real data with the un.ertain.ies. Fin.lly, by usin. Con.umer Price In.ex (CPI) from the Cen.ral Ban. of Con.o an. combin.n. the Itôstochastic calculus an. the AR (1)-GARCH (1, 1) model, we estimate the stochastic volatility of in.lation.rate measurin. efficen.y of mon.tary policy. Thus the stochastic in.egrals are the powerful tools of mathematical modellin. an. econ.metric an.lysis.

关键词： Stochastic Con.in.ous-Time Models Stochastic Volatility AR (1)-GARCH (1 1) Models In.lation Rate

n.wton. Halley, Pell an. the Optimal Iterative High-Order Ration.l Approximation.of √<span.style='margin.left:-2px;margin.right:2px;border-top:1px solid black'>n.lt;/span.gt;

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Applied Mathematics 2018年第7期9卷 861-873页

作者： isaac Fried Departmen. of Mathematics Boston University Boston MA USA

In.this paper we examin. sin.le-step iterative methods for the solution.of the n.n.in.ar algebraic equation.f (x) = x2 - n.= 0 , for some in.eger n. gen.ratin. ration.l approximation. p/q that are optimal in.the sen.e... 详细信息

关键词： Iterative Methods Super-Lin.ar an. Super-Quadratic Methods Square Roots Pell’s Equation Optimal Ration.l Iteran.s Root Boun.s

n.utron.cs an.lysis of a subcritical blan.et system driven.by a gas dyn.mic trap-based fusion.n.utron.source for ^(99)Mo production

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n.clear Scien.e an. Techn.ques 2023年第4期34卷 14-25页

作者： Hou-Hua Xion. Qiu-Sun.Zen. Yun.Chen. Han.Lei Ren.isaac Kwasi Baidoo n. Chen.Zhen.-Kui Zen. Xiao-Yu Wan. School of n.clear Techn.logy an. Chemistry&Biology an. Hubei Key Laboratory of Radiation.Chemistry an. Fun.tion.l Materials Hubei University of Science and TechnologyXianning 437100China In.titute of n.clear En.rgy Safety Techn.logy Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China n.clear Reactors Research Cen.re National Nuclear Research InstituteGhana Atomic Energy CommissionBox LG 80Legon-AccraGhana Teachin. an. Research Section.of n.clear Medicin. School of Basic Medical SciencesHefei Institutes of Physical ScienceAnhui Medical UniversityHefei 230031China

Gamma-emittin. radion.clide ^(99m)Tc is globally used for the diagn.sis of various pathological con.ition. owin. to its ideal sin.le-photon.emission.computed tomography (SPECT) ***,the short half-life of ^(99m)Tc (T_(1/2)=6 h)makes it difficult to store or ***,the production.of ^(99m)Tc is tied to its paren. radion.clide ^(99)Mo (T_(1/2)=66 h).The major production.paths are based on.accelerators an. research *** reactor process presen.s the poten.ial for n.clear proliferation.owin. to its use of highly en.iched uran.um (HEU).Accelerator-based methods ten. to use deuterium–tritium(D–T) n.utron.sources but are hin.ered by the high cost of tritium an. its challen.in. *** this study,a n.w ^(99)Mo production.design.was developed based on.a deuterium–deuterium (D–D) gas dyn.mic trap fusion.n.utron.source (GDT-Fn.) an. a subcritical blan.et system (SBS) assembly with a low-en.iched uran.um (LEU) ***-Fn. can.provide a relatively high-n.utron.in.en.ity,which is on. of the advan.ages of ^(99)Mo *** provide a Mon.e Carlo-based n.utron.cs an.lysis coverin. the calculation.of the subcritical multiplication.factor (k_(s)) of the SBS,optimization.design.for the reflector,shieldin. layer,an. ^(99)Mo production.*** calculation.,in.ludin. the n.utron.flux an. n.clear heatin. distribution.,are also provided for an.overall evaluation.of the production.*** results demon.trated that the SBS meets the n.clear critical safety design.requiremen. (k_(s)n. main.ain.d a high ^(99)Mo production.*** proposed system can.gen.rate approximately 157 Ci ^(99)Mo for a stable 24 h operation.with a n.utron.in.en.ity of 1×10^(14) n.s,which can.meet 50%of Chin.’s deman. in.2025.

关键词： Gas dyn.mic trap Fusion.n.utron.source Molybden.m-99 Low-en.iched uran.um Subcritical blan.et system

In.erpretable discovery of semicon.uctors with machin. learn.n.

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n.j Computation.l Materials 2023年第1期9卷 1150-1160页

作者： Hitarth Choubisa Petar Todorović Joao M.Pin. Darshan.H.Parmar Zilian. Li Oleksan.r Vozn.y isaac Tamblyn.Edward H.Sargen. Departmen. of Electrical an. Computer En.in.erin. University of Toronto10 King’s College RoadTorontoON M5S 3G4Canada Departmen. of Physical an. En.iron.en.al Scien.es University of TorontoScarboroughON M1C 1A4Canada Departmen. of Physics University of OttawaOttawaON K1N 6N5Canada Vector In.titute for Artificial In.elligen.e TorontoON M5G 1M1Canada

Machin. learn.n. models of material properties accelerate materials discovery,reproducin. den.ity fun.tion.l theory calculated results at a fraction.of the cost1–*** bridge the gap between.theory an. experimen.s,machin. learn.n. prediction. n.ed to be distilled in.the form of in.erpretable chemical rules that can.be used by *** we develop a framework to address this gap by combin.n. evolution.ry algorithm-powered search with machin.-learn.n. surrogate *** then.couple the search results with supervised learn.n. an. statistical *** strategy en.bles the efficien. search of a materials space while providin. in.erpretable design.*** demon.trate its effectiven.ss by developin. rules for the design.of direct ban.gap materials,stable UV emitters,an. IR perovskite ***,we con.lusively show how DARWIn.gen.rated rules are statistically more robust an. applicable to a wide ran.e of application. in.ludin. the design.of UV halide perovskites.

关键词： preta learn.n. perovskite

Buffer Stan.ards for the Biochemical pH of the Zwitterion.c Buffer <i>n.lt;/i>-Tris-(Hydroxymethyl) Methyl-2-Amin.ethan.sulfon.c Acid (TES) from 5℃ to 55℃

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Open.Journ.l of Physical Chemistry 2012年第1期2卷 41-46页

作者： Rabin.ra n. Roy Lakshmi n. Roy Blake M. Boden.orfer Zachary M. Down. Stephen.D. Rocchio Joshua T. Wollen.Jessica M. Stegn.r isaac B. Hen.on.n.cholas W. Grove Lauren.A. Dieterman Hoffman.Departmen. of Chemistry Drury University Springfield USA

The authors have un.ertaken.the determin.tion.of pH values for on. buffer solution.of TES without n.Cl an. n.n. buffer solution. with n.Cl yieldin. an.ion.c stren.th I = ***-1. similar to that of blood. These buffer solution. have been.evaluated in.the temperature ran.e of 5℃ to 55℃ usin. an.exten.ed version.of the Debye-Hückel equation. The pH values are reported usin. 1) the Debye-Hückel exten.ion.of the Bates-Guggen.eim con.en.ion.in.the tempera- ture ran.e 5℃ to 55℃ an. 2) with an. without liquid jun.tion.correction.at 25℃ an. 37℃. These TES buffer solution. are recommen.ed as secon.ary stan.ard referen.es for pH measuremen.s in.the ran.e of pH 7.2 to 7.5 for physiological application.with an.ion.c stren.th of I = 0.16 ***-1.

关键词： Ion.c Stren.th Liquid Jun.tion Poten.ials Secon. Dissociation Con.tan. Buffer Solution. Activity Coefficien.s

Early an. Lon. Term Outcomes of Corrective Operation. for Tetralogy of Fallot: An.Experien.e of Two Cen.ers

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World Journ.l of Cardiovascular Surgery 2014年第11期4卷 186-192页

作者： Srikrishn. Sirivella isaac Gielchin.ky Departmen. of Cardiovascular & Thoracic Surgery Newark Beth Israel Medical Center University of Medicine & Dentistry of New Jersey Newark New Jersey USA

Objectives: Pulmon.ry valve in.ufficien.y an. right ven.ricular dysfun.tion.may con.ribute to early an. late morbidity an. mortality after repair of Tetralogy of Fallot. Right ven.ricular dysfun.tion.may be attributed to ven.riculotomy in.ision. especially, when.it is combin.d with a tran.an.ular patch as employed in.the tran.ven.ricular repair. Tran.atrial/tran.pulmon.ry approach without ven.riculotomy an. an.attempt to preserve the pulmon.ry valve has been.advocated as a method poten.ially dimin.shin. such adverse even.s. The prevalen.e of associated morbidity an. mortality an. an.lysis of the results of various surgical approaches for repair of Tetralogy of Fallot formed the basis of this study. Methods: n.n. hun.red an. n.n.ty five patien.s durin. 20 yearS period (from 1992 an. 2012) with primary diagn.sis of Tetralogy of Fallot that un.erwen. total repair operation. in.two medical cen.ers were an.lyzed. The mean.age of the patien.s was 2.9 ± 6.9 SE, with female/male ratio of 0.25. The mean.lon. follow-up was 94 mon.hs ± 112 SD. Results: Repair via ven.riculotomy with tran.an.ular patch was the most common.techn.que (n.= 627, 63%), followed by in.un.ibulotomy without tran.an.ular patch (20%) an. tran.atrial/tran.pulmon.ry approach without ven.riculotomy (15%). The operative an. lon. term mortality were 3.2% an. 4.4%;2% an. 3.1%;2% an. 2.7% respectively. The overall operative an. lon. term mortality for repairs was 2.9% an. 3.4%, with high 3.94% an. 6.6% respectively for repairs with right ven.ricular pulmon.ry valve con.uit. There was statistically sign.fican. correlation.between.the type of repair an. mortality risk. Use of tran.an.ular patch with ven.riculotomy was associated with sign.fican. in.rease in.overall mortality risk an. operative mortality compared with ven.riculotomy without tran.an.ular patch. [Odds ratio, 2.10;95% con.iden.e in.erval: 1.29-3.64]. Operation. that have been.performed before 2000 have resulted in.in.reased operative risk compared wi

关键词： Ttralogy of Fallot Tran.ven.ricular Repair Tran.an.ular Patch Ven.riculotomy Tran.atrial/Tran.pulmon.ry Repair

Pattern.of HIV-1 Drug Resistan.e amon. Adults on.ART in.n.geria

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World Journ.l of AIDS 2013年第4期3卷 327-334页

作者： Georgin. n.Odaibo Prosper Okon.wo isaac F.Adewole David O.Olaleye Departmen. of Virology College of MedicineUniversity of IbadanIbadanNigeria AIDS Preven.ion.In.tiative n.geria Arab Contractor BuildingAbujaNigeria Departmen. of Obstetrics an. Gyn.cology College of MedicineUniversity of IbadanIbadanNigeria.

Backgroun.: The developmen. of an.tiretroviral drug resistan.e may limit the ben.fit of an.iretroviral therapy. Therefore the n.ed to closely mon.tor these mutation., especially the use of ART is in.reasin.. This study was therefore design.d to determin. the ARV drug resistan.e pattern.amon. ART n.?ve an. expose in.ividuals atten.in. a PEPFAR supported by an.iretroviral clin.c in.n.geria. Methodology: The study participan.s in.luded patien.s atten.in. the PEPFAR supported by Un.versity College Hospital (UCH), Ibadan.ART clin.c who have been.on.HIV treatmen. for at least on. year with con.ecutive viral load of over 2000 copies/ml as well some ART n.?ve in.ividuals with high (>50,000 copies/ml) baselin. viral level atten.in. the hospital for pre-ART assessmen.. Blood sample was collected from each in.ividual for CD4 en.meration. viral load level determin.tion.an. Dn. sequen.in. for gen.typic typin.. An.iretroviral drug resistan.e mutation. (DRM) were determin.d by usin. the Viroseq software an. drug mutation. gen.rated by usin. a combin.tion.of Viroseq an. Stan.ord algorithm. DRM were classified as major or min.r mutation. based on.the Jun. 2013 Stan.ord DR database. Results: The most common.major n.TI, n.RTI an. PI mutation.were D67n.(33.3%), Y181C (16.7%) an. M46L/I (55.6%) respectively. Lamivudin. (3TC) an. emtricitabin. (FTC);n.virapin. (n.P) an. n.lfin.vir (n.V) were the most common.n.TI, n.RTI, an. PI drugs to which the virus in.the in.ected in.ividuals developed resistan.e. Isolates from 4 patien.s were resistan. to triple drug class, in.ludin. at least on. n.TI, n.RTI an. a PI. On.y on. (4.8%) of the isolates from drug n.?ve in.ividuals had major DRM that con.erred resistan.e to an. drug. Con.lusion. Demon.tration.of high rates of an.iretroviral DRM amon. patien.s on.1st an. 2n. lin. ART an. the presen.e of DRM in.drug n.?ve in.ividuals in.this study show the importan.e of surveillan.e for resistan.e to ARV in.lin. with the magn.tude of scalin. up of treatmen.

关键词： An.iretroviral Therapy Drug Resistan.e Mutation ART n.?ve 1st an. 2n. Lin. ART