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Inde.tation toughne.s of Mo_5Si_3-base. alloys

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中国有色金属学会会刊：英文版 2002年第4期12卷 676-680页

作者： e.Strom 张继冯荻 Chalme.s Unive.sity of Te.hnology SE-412 96 Gothenburg Sweden Ce.tral Iron and Ste.l Re.e.rch Institute Beijing 100081 China

The.inde.tation toughne.s of Mo 5Si 3 base. phase. was studie. with re.ard to diffe.e.t alloying e.e.e.ts, amount of alloying addition as we.l as the.pre.e.ce.of se.ondary phase.. cr, Ti, Nb, Ni and Co we.e.adde. as alloying e.e.e.ts. The.re.ults show that the.inde.tation fracture.toughne.s of Mo 5Si 3 incre.se. with the.alloying additions, from 2.4?MPa·m 1/2 for monolithic to just ove. 3?MPa·m 1/2 for highly alloye. Mo 5Si 3. Small volume.fractions of brittle.se.ondary phase. may have.a positive.impact on the.inde.tation toughne.s; while.large. fractions se.ms to lowe. the.toughne.s.

关键词： Mo5Si3基合金压痕韧性自润滑材料

Compositional Variation and Mine.al Che.istry of the.Jinshajiang and Lancangjiang Se.pe.tinite., Yunnan Province. SW China

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Acta Ge.logica Sinica(e.glish e.ition) 2014年第6期88卷 1705-1728页

作者： Ahme. e.I.MASOUD YANG Jingsui LIU Fe. State.Ke. Laboratory of Contine.tal Te.tonics and Dynamics Institute of Geology Chinese Academy of Geological Sciences Faculty of e.rth Scie.ce. China University of Geosciences Ge.logy De.artme.t Faculty of Science Tanta University

We.pre.e.t the.whole.rock and the.mine.al che.ical data for uppe. mantle.pe.idotite. from the.San-Jiang re.ion in Yunnan, SW China. The.e.pe.idotite. are.a part of a Pale.-Te.hyan ophiolite.be.t occurring along the.Jinshajiang and Lancangjiang suture.zone.. All sample. of the.Jinshajiang and Lancangjiang ultramafic rocks are.comple.e.y se.pe.tinize.. The.Jinshajiang se.pe.tinite. are.characte.ize. by no re.ict of olivine.and pyroxe.e. and the.cr# conte.t of spine.s is 0.32–0.49. The.Lancangjiang se.pe.tinite. we.e.colle.te. from two diffe.e.t locations; the.northe.n location which has some.re.ict of Opx（Al2O3 is 0.13–2.2 wt%, TiO 2 is 0.004–0.057 wt% and Mg# conte.t is 0.895–0.933） and the.cr# conte.t of spine. is 0.26-0.55; the.southe.n location, which has some.re.ict of Olivine.Fo = 90–92.5 and NiO = 0.12–0.26 wt%）, and spine. cr# ranging from 0.41 to 0.57. The.whole.rock ge.che.ical and the.mine.al che.istry data imply that the.Jinshajiang and Lancangjiang se.pe.tinite. re.re.e.t abyssal pe.idotite. re.idue. afte. ~15–20% partial me.ting for the.Jinshajiang and Lancangjiang se.pe.tinite.（south location）, and ~11–19% partial me.ting for the.Lancangjiang se.pe.tinite.（north location）. In addition, the.compositional tre.ds of the.spine. analyse. of the.Lancangjiang se.pe.tinite. imply that the.MORB me.t-pe.idotite.inte.action proce.s playe. a significant role.during the.r e.olution. The.e.proce.se. are.e.ide.ce. by an incre.se.in cr# with an incre.se.in TiO 2, whe.e.s the.spine. analyse. of the.Jinshajiang se.pe.tinite. display an incre.se.in cr# with a de.0}e.se.in Ti O2, indicating that the.Jinshajiang se.pe.tinite. we.e.subje.te. to a simple.partial me.ting proce.s.

关键词： chromite Jinshajiang ophiolite Lancangjiang ophiolite

A Nove. Approach in Hydroge.che.ical e.ploration for Uranium Mine.alization:an e.ample.from We.t Ce.tral Sinai,e.ypt

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Acta Ge.logica Sinica(e.glish e.ition) 2015年第6期89卷 1895-1913页

作者： Ahme. e.e.-RAYe. Mohame. O.ARNOUS Sue. Canal Unive.sity Faculty of SciencesGeology Department

Groundwate. in contact with ore.de.osits may acquire.a che.ical composition that could be.use. as a guide.for e.ploration. e.ght we.l-wate. sample. are.colle.te. from a known uraniummine.alize. are. ne.r Abu Ze.ima, we.t ce.tral Sinai to e.amine.the.applicability of using the.hydroge.che.ical te.hnique.in the.se.rch for uranium mine.alization in similar arid are.s. The.analytical che.ical data of the.ground wate. is compare. with ground radiome.ric me.sure.e.ts. The.obtaine. re.ults indicate.that groundwate. affe.te. by uranium mine.alization has a spe.ific re.ativity of major anions e.pre.se. e.se.tially as SO_4〉Cl〉HCO_3 and to a le.se. e.te.t as Cl〉SO_4〉HCO_3, associate. as a rule.with low magne.ium conte.t. This association constitute. a signature.of uranium mine.alization on the.composition of groundwate. in we.t ce.tral Sinai and could be.use. as an important e.ploration guide.in the.se.rch for uranium de.osits in similar are.s. Anomalie. in Ni, Fe. Zn and cr and othe. pathfinde. e.e.e.ts in groundwate. can furnish ge.che.ical guide. to uranium ore.. The.immobile.trace.e.e.e.t anomalie., including Zn, Ni and Fe.are.strongly distribute. ne.r the.ore.ody; whe.e.s the.re.ative.y mobile.trace.e.e.e.ts, including Co, U, V and cr, constitute.the.dispe.sion haloe. away from the.ore.ody. A ne. hydroge.che.ical discrimination diagram is constructe. to be.use. as a quick and cost e.fe.tive.e.ploration tool in the.se.rch for uranium occurre.ce. in e.vironme.tally similar arid are.s. Base. on the.obtaine. re.ults, a ne. site.for uranium occurre.ce. we.t of W. Baba, is de.ine.te. and re.omme.de. for future.de.aile. ge.logical and ge.che.ical surve.ing.

关键词： Hydroge.che.ical e.ploration Uranium ore. ge.spatial mapping graphical e.plorationtool re.ote.se.sing Sinai

磷酸钛离子交换剂纯化饱和LiNO_(3)溶液的平衡

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Transactions of Nonfe.rous Me.als Socie.y of China 2023年第8期33卷 2543-2558页

作者： V.I.IVANe.KO M.V.MASLOVA P.e.e.STROPOVA L.G.Ge.ASIMOVA Tananae. Institute.of Che.istry and Te.hnology of Fe.e.al Re.e.rch Ce.tre Kola Science Centre of the Russian Academy of SciencesApatityRussia

研究磷酸钛离子交换剂(Li-TiOP)在饱和LiNO_(3)溶液中对Cu^(2+)、Co^(2+)、Mn^(2+)、Ni^(2+)和cr^(3+)离子的吸附性能。采用XRD、Se.、TG、DSC、NGSP和元素分析对固体样品进行表征。采用原子吸收光谱法(AAS)和电感耦合等离子体质谱法(IC... 详细信息

研究磷酸钛离子交换剂(Li-TiOP)在饱和LiNO_(3)溶液中对Cu^(2+)、Co^(2+)、Mn^(2+)、Ni^(2+)和cr^(3+)离子的吸附性能。采用XRD、Se.、TG、DSC、NGSP和元素分析对固体样品进行表征。采用原子吸收光谱法(AAS)和电感耦合等离子体质谱法(ICP MS)测定溶液中离子的浓度。采用Langmuir、Fre.ndlich、Te.kin和Nikolsky模型计算金属离子的吸附等温线。在研究金属离子吸附时,必须考虑吸附剂的溶剂化状态。Li-TiOP对所研究离子的选择性为:cr^(3+)>Cu^(2+)>Mn^(2+)>Co^(2+)>Ni^(2+),且对上述4种模型均适用。吸附过程热力学参数的变化与吸附剂离子电位的变化有关。磷酸钛能有效去除多组分溶液中的微量金属离子,使LiNO_(3)纯度高于99.999%(质量分数)。

关键词：硝酸锂磷酸钛提纯过渡金属元素吸附吸附等温线热力学

He.vy Me.al Accumulation in Maize.(<i>Ze. mays</i>L.) Grown on Chromate. Coppe. Arse.ate.(CCA) Contaminate. Soil Ame.de. with Tre.te. Composte. Se.age.Biosolid

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Journal of e.vironme.tal Prote.tion 2018年第11期9卷 1196-1204页

作者： C. K. Nakiguli B. Namakula J. Odda J. Wasswa e. Ntambi Che.istry De.artme.t Faculty of Science Mbarara University of Science & Technology Mbarara Uganda Inte.national He.lth Scie.ce. Clarke International University Kampala Uganda Che.istry De.artme.t School of Physical Sciences College of Natural Sciences Makerere University Kampala Uganda

A pot e.pe.ime.t was conducte. to inve.tigate.the.he.vy me.al accumulation in maize.(Ze. mays L.) plant grown in chromate. coppe. arse.ate.(CCA) soil ame.de. with tre.te. composte. se.age.biosolid. The.initial conce.trations of chromium, coppe., arse.ate.in the.CCA soil and se.age.biosolid we.e.de.e.mine. by atomic absorption spe.trophotome.e.. The.e.we.e.found to be. in CCA soil: 365.8 ± 6.18, 109.22 ± 14.04, 28.22 ± 3.8 and in se.age.biosolid: 35 ± 1.06, 1.0 ± 0.02, 0 mg·kg-1 re.pe.tive.y. The.conce.tration of cr, Cu and As de.e.mine. in both the.roots and shoots ge.e.ally de.0}e.se. with incre.se.in pe.ce.tage.ame.dme.t conce.tration and numbe. of days (20 and 40 days afte. planting). At 20 days, the.total me.al conce.tration range. in roots we.e.As (5.54 ± 0.03 - 6.69 ± 1.14), cr (9.59 ± 0.02 - 13.22 ± 0.03), Cu (2.28 ± 0.06 - 4.53 ± 0.37) mg·kg-1 while.at 40 days the.value. we.e.As (5.60 ± 0.19 - 6.08 ± 0.01), cr (9.47 ± 0.04 - 10.95 ± 0.09), Cu (3.94 ± 0.19 - 4.64 ± 0.07) mg·kg-1. For the.shoot syste., the.conce.trations of the.me.als at 20 days we.e.As (5.28 ± 0.03 - 5.90 ± 0.13), cr (9.30 ± 0.05 - 10.07 ± 0.06), Cu (3.64 ± 0.12 - 4.72 ± 0.15) mg/kg while.at 40 days the.value. obtaine. we.e.As (5.28 ± 0.03 - 5.9 ± 0.13), cr (9.69 ± 0.14 - 10.07 ± 0.03), Cu (2.94 ± 0.72 - 4.53 ± 0.03) mg·kg-1. The.roots accumulate. the.thre. he.vy me.als more.than the.shoot syste. at all tre.tme.ts use.. Conce.tration of arse.ic, chromium and coppe. in the.plants de.0}e.se. with incre.sing pe.ce.tage.ame.dme.ts. The.re.ults sugge.t re.ative.y low bioavailability of the.thre. me.als in CCA soil tre.te. with high pe.ce.tage. of se.age.biosolid as an ame.dme.t.

关键词： Arse.ic Chromium Coppe. Contaminate. CCA Soil Se.age Ame.dme.t

Synthe.e. of Coordination Compounds of 2-Amino-3-Me.hylbutanoic Acid The.r Mixe. Ligand Comple.e. and Antibacte.ial Activitie.

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Advance. in Biological Che.istry 2020年第3期10卷 67-85页

作者： Te.itayo O. Aiye.abola Iyanuoluwa e. Okunade.Johan H. L. Jordaan Danie. P. Otto De.artme.t of Che.istry Obafemi Awolowo University Ile-Ife Osun State Nigeria Re.e.rch Focus Are. for Che.ical Re.ource.Be.e.iciation Laboratory for Analytical Services North-We.t Unive.sity Potchefstroom South Africa

Coordination compounds of 2-amino-3-me.hylbutanoic acid we.e.synthe.ize. with chromium(III) and oxovanadium(IV) ions. M:L;1:2. Adducts of the.e.comple.e. using 1,10-phe.antroline.and e.hyle.e.iamine.we.e.furthe. synth... 详细信息

Coordination compounds of 2-amino-3-methylbutanoic acid were synthesized with chromium(III) and oxovanadium(IV) ions. M:L;1:2. Adducts of these complexes using 1,10-phenantroline and ethylenediamine were further synthesized, M:L, (1:2). These compounds were characterized using electronic, infra-red spectrophotometry, magnetic susceptibility measurement and percentage metal analyses. The zones of inhibition and minimum inhibitory concentrations of the compounds against eight microbes were studied. The results obtained indicated an octahedral geometry for the Cr(III) complexes, indicative of additional coordination of two water molecules. On the other hand a square pyramid geometry was obtained for the binary oxovanadium complex and its 1,10-phenantroline adduct. However, for the oxovanadium ethylenediamine adduct a distorted octahedral geometry was proposed. The result for the antibacterial studies indicated that both mixed ligand complexes of 1,10-phenantroline exhibited good antibacterial activity, and in some cases better activity than the standard, streptomycin.

关键词： Coordination Compounds 2-Amino-3-Me.hylbutanoic Acid Mixe. Ligand Comple.e. Minimum Inhibitory Conce.tration 1 10-Phe.antroline e.hyle.e.iamine

Re.oving contaminants from tanne.y waste.ate. by che.ical pre.ipitation using CaO and Ca(OH)2

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Chine.e.Journal of Che.ical e.gine.ring 2020年第4期28卷 1107-1111页

作者： Adriana Re.e.-Se.rano Joe. e.ópe.-Ale.o Manue. AHe.nánde.-Cortázar Ignacio e.izalde Instituto Politécnico Nacional Centro Mexicano para la Producción más LimpiaCiudad de México 07340Mexico

The.re.oval of cr,sulfate. and Che.ical Oxyge. De.and(COD)from industrial tanne.y waste.ate. by che.ical pre.ipitation was carrie. out using Calcium oxide.CaO)and Calcium hydroxide.Ca(OH)2).Diffe.e.t dose. of alkalis,ranging from de.icie.cy to e.ce.s hydroxyl spe.ie. ove. the.stoichiome.ric ne.e.sary,we.e.use. to re.ove.the.re.ically the.100%of cr[0.3-3.2 g alkali·(g cr^3+)^-1].The.pre.ipitation was carrie. out at room te.pe.ature.10 min of vigorous stirring,200 r·min^-1 and a se.tling time.of 24 h,followe. by se.aration and characte.ization of liquid *** re.ult of addition of alkalis,pH unde.we.t incre.se.as did the.alkali *** re.oval of cr,and sulfate. also incre.se. as alkali conce.tration did,although for first spe.ie. the.change. at highe. alkali conte.ts we.e.le.s *** re.oval on the.othe. hand,did not follow a unique.tre.d,inste.d e.hibite. a *** on our re.ults,se.e.tion of a spe.ific dose.of alkali was carrie. out taking as re.e.e.ce.the.e.ficie.cy on total chromium re.oval,ke.ping the.pH in the.range.7 to 9 to e.sure.cr pre.ipitation as chromium *** those.conditions,jar te.t was use. to produce.e.ough liquid product in orde. to de.e.mine.the.re.oval pe.ce.t of se.e.al othe. *** re.oval pe.ce.t of the.spe.ie. was as follows:cr,SO4^2-,ZnSO4,Fe.O4,CN^-1,NiSO4,Fe.[Fe.CN)6]at 99.8%,66.9%,99.6%,21.4%,70.9%,52.8%and 76.4%with CaO,and 99.8%,61.6%,99.9%,7.1%,84.0%,54.4%and 90.5%with Ca(OH)2,re.pe.tive.y.

关键词： Tanne.y waste.ate. Alkali Re.oval Chromium Sulfate. Syne.gistic e.fe.t

Ute.ine.Re.e.fusion Ische.ia and Use.of e.astic Tournique.

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Journal of Bioscie.ce. and Me.icine. 2019年第2期7卷 98-119页

作者： J. F. Nnang e.sone.F. Ovono Abe.solo A. Tsagoule.a G. e.jo Nkhilli P. Assoumou J. A. Bang Ntamack e. Anyunzok U. Minkobame.J. F. Me.e.e. Ngou Milama De.artme.t of Physiology Faculty of Medicine and Health Sciences Libreville Gabon De.artme.t of Ane.the.ia Re.uscitation e.e.ge.cie. University Hospital Center of Owendo Owendo Gabon De.artme.t of Che.istry-Bioche.istry Faculty of Medicine and Health Sciences Libreville Gabon Ane.the.ia Re.uscitation Se.vice.Army Training Hospital Libreville Gabon De.artme.t of Gyne.ology and Obste.rics Faculty of Medicine and Health Sciences Libreville Gabon De.artme.t of Mathe.atic and Biostatistic Faculty of Medicine and Health Sciences Libreville Gabon

Introduction: In humans, it has not be.n e.tablishe. that the.use.of e.astic tournique. (e.) during myome.tomie., whose.de.ive.y time. do not e.ce.d 90 minute., which is re.ponsible.for ische.ia re.e.fusion (I/R) syste.ic. Obje.tive.: To study the.plasma variations of marke.s of I/R during myome.tomie. pe.forme. with e., whose.e.posure.time.doe. not e.ce.d 90 minute.. Population and me.hods: Plasma créatinin phosphokinase.kinase.(CPK) and gluthatione.pe.oxydase.(GPX) le.e.s of patie.ts with e. myoma (M + G +, n = 19), take. be.ore. during and afte. e.posure. we.e.compare. to those.of wome. ope.ate. on myoma without tournique. (M + G -, n = 15), carrie.s of unope.ate. myomas (M + G0, n = 20) and controls (M0G0, n = 18). The.duration of e.posure.of the.e. was de.e.mine., and pe.iope.ative.variations of GPX, Ca2+, K+ and CPK be.we.n M + G + and othe.s groups we.e.analyze. (p Re.ults: The.ave.age.duration of e.posure.of the.e. was 51.56 ± 14.12 [30 - 88] min. In M + G +, prior to inse.tion, CPK was 71.64, GPX 3.537, Ca2+ 3.000, K+ 3.934, and did not vary from those.of M + G - (CPK = 59.354, GPX = 3.205, Ca2+ = 2.525, K+ = 3.788), M + G0 (CPK = 71.640, GPX = 2.759, Ca2+ = 3.004, K+ = 3.934) and M0G0 (CPK = 57.2, GPX = 2.306, Ca2+ = 2.879, K+ = 3.705). Conve.se.y, during the.posture.(CPK = 95.665, GPX = 3.645, Ca2+ = 3.642, K+ = 4.757) and afte. the.re.e.se.of the.e. (CPK = 135.443, GPX = 3.694, Ca2+ = 3.892, K+ = 5.322), the.e.rate. we.e.highe. among the.M + G + compare. to the.M + G0 and M0G0, but did not diffe. from those.of the.M + G - during (CPK = 91.270, GPX = 3.413, Ca2+ = 3.068, K+ = 4.257) and afte. re.e.se.(CPK = 137.776, GPX = 3.632, Ca2+ = 3.148, K+ = 5.075). Conclusion: The.plasmatic conce.tration of ische.ia (CPK, K+) and re.e.fusion (GPX, Ca2+) biomarke.s doe. not diffe. be.we.n M + G + and M + G -, but is e.e.ate. re.ative.y to controls (M0G0), but also to M + G0’s group. The.e.re.ults show that, for e.posure.time. not e.ce.ding 90 minute., the.e.astic to

关键词： Ische.ia Re.e.fusion Ute.us e.astic Tournique.

e.pe.ime.ts De.ign for Hardne.s Optimization of the.Ni-cr Alloy e.e.trode.osite. by Pulse.Plating

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Acta Me.allurgica Sinica(e.glish Le.te.s) 2013年第5期26卷 558-564页

作者： I.Imanie. e.Youse.i A.Dolati M.R.Mohammadi De.artme.t of Mate.ials Scie.ce.and e.gine.ring Sharif University of Technology

The.hardne.s of the.Ni-cr alloy which is e.e.trode.osite. in chloride.solution, is optimize. by de.ign of e.pe.ime.t me.hod（ce.tral composite.de.ign）. Various parame.e.s we.e.e.aluate. in orde. to find significant factors in this proce.s. Fre.ue.cy, duty cycle. curre.t de.sity and te.pe.ature.we.e.se.e.te. as e.e.tive.factors. Analyse. of variance.ANOVA） we.e.pe.forme. on the.re.ults of the.de.igne. e.pe.ime.ts. The.be.t mode. which can pre.ict the.hardne.s of the.Ni-cr alloy e.e.trode.osits was found whe.e.s the.fre.ue.cy and quadratic be.aviour of the.curre.t de.sity we.e.the.most significant mode. te.ms. Se.ious inte.action of the.curre.t de.sity with fre.ue.cy and duty cycle.also we.e.found in this mode.. Finally the.optimum conditions of the.factors for obtaining the.maximum hardne.s of the.Ni-cr alloy we.e.found. Ni-cr alloy with hardne.s 828 HV（e.e.trode.osite. with fre.ue.cy 63 Hz, curre.t de.sity 1800 A/m2, duty cycle.75% and te.pe.ature.31℃ bath） we.e.asse.se. as the.optimum de.osit. The.de.osit unde. the.optimum condition was inve.tigate. by scanning e.e.tron microscopy（Se.）, e.X analysis, polarization me.hod and microhardne.s.

关键词： Ni-cr e.e.trode.osition Hardne.s Optimization