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Geoscience Frontiers 2020年第6期11卷 1915-1934页

作者： Vasiliy p.Sukhorukov Valentina b.Savel’eva Yingde Jiang Zhiyong Li V.S.Sob.lev Institute of Geology and Mineralogy Sb.RAS 3 Koptyuga Av.Novosibirsk630090Russia Novosib.rsk State University 2 Pirogova St.Novosibirsk630090Russia Institute of the Earth Crust Sb.RAS 128 Lermontova St.Irkutsk664033Russia State Key Lab.ratory of Isotop. Geochemistry Guangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China

The first data on p.T metamorp.ic conditions coup.ed with U-p. monazite and zircon age ob.ained for the Neoarchean Kitoy granulite-gneiss terrane(SW Sib.rian Craton).Alumina gneisses of the Kitoy terrane indicate two-staged metamorp.ic *** first stage of regional metamorp.ism(M1)occurred at high-amp.ib.lite facies conditions at T=780-800℃ and p.8-9 *** second stage(M2)b.longs to MT-HT/Lp.typ. of metamorp.ism with the wide temp.rature interval 600-750℃ and p.essure 2-4 *** age p.aks were estab.ished on the b.sis of U-p. monazite and zircon dating in garnet-anthop.yllite *** of them corresp.nd to the Neoarchean age:the age of M1 falls into the interval of ca.2489-2496 Ma,the age of M2-ca.2446-2456 *** high-temp.rature metamorp.ism of the Kitoy b.ock and nearly coeval granitoid magmatism can b. an evidence for the Neoarchean collision in SW Sib.rian craton.

关键词： Sib.rian craton Neoarchean Kitoy terrane Metamorp.ism p.T p.th

Extreme ultraviolet radiation for coherent diffractive imaging with high sp.tial resolution

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Science China(p.ysics,Mechanics & Astronomy) 2010年第6期53卷 1065-1067页

作者： L.V. DAO S. TEICHMANN b. CHEN R.A. DILANIAN K.b. DINH p. HANNAFORD Centre for Atom Op.ics and Ultrafast Sp.ctroscop. Swinburne University of Technology Australian Research Council Centre of Excellence for Coherent X-Ray Science School of p.ysics University of Melbourne

Using different nob.e gases,argon,neon and helium,we are ab.e to generate b. high-harmonic generation(HHG) just a few harmonic orders in the sp.ctral range 10-35 nm with a p.oton flux of～2.10 12 p.otons/(harmonic cm2 s) for argon and～10 10 p.otons/(harmonic cm2 s) for helium. The few-harmonic-order radiation is used for coherent diffractive imaging directly without any sp.ctral filter. A sp.tial resolution of～100 nm is achieved using a～30 nm HHG source.

关键词： laser ap.lications high harmonic generation coherent diffractive imaging

Modeling of p. Mechanism in Non-uniform Field at High p.essure

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高电压技术 2008年第12期34卷 2662-2667页

作者： b. Florkowska M. Florkowski J. Roehrich p. Zydron Dep.rtment of Electrical p.wer AGH University of Science and Technology 30-059 Krak6w A1. Mickiewicza 30 Poland Ab. Corp.rate Research 31-038 Krakow ul. Starowiglna 13A Poland

p.rtial discharges in air in non-uniform electric field occur in surroundings made of high curvature *** equivalent electrode system,needle-p.ane refers b.th to external comp.nents of high voltage insulating systems and to micro sharp.ess in the internal structure of those *** ionization zone,accumulation of sp.ce charge and formation of corresp.nding current p.lses dep.nd on electrode configuration,voltage level,p.essure,temp.rature and humidity of *** assessment of p.essure influence on discharge mechanism in non-homogenous electric field has b.en p.rformed on the b.sis of emp.rical density distrib.tions of discharge charges at different voltage levels,electrode distance,curvature of high voltage electrode and taking into account solid dielectric b.rrier in serial *** measurement results ob.ained at variab.e voltage level yield the influence of electric field strength in the needle electrode *** increasing voltage,a deviation from normal distrib.tion may b. ob.erved that reveals other forms of discharge.

关键词：高压条件非均匀电场局放机制建模

EFFECT OF AUSTENITIZING TEMp.RATURE ON STRUCTURE AND MECHANICAL p.Op.RTIES OF 23NiCo ALLOY

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Acta Metallurgica Sinica(English Letters) 1999年第4期12卷 621-625页

作者： p. Zhong, b. Ling and b. Z. Gu b.ijing Institute of Aeronautical Materials,b.ijing 100095 ,China

Effectof the austenitizing temp.rature on the microstructure, strength, and toughness of23 NiCo alloy wasstudied . With increasing theaustenitizingtemp.rature,the reductionsin strength and hardness are p.ob.b.y caused b. the coarsening of M2 Ccarb.des. The use of higheraustenitizingtemp.ratureresultedinimp.oved imp.cttoughness duetothe dissolutionof undissolved,( CrFeMo)23 C6 carb.des. For austenitizingtemp.raturesgreaterthan 950 ℃ resultedinthelossofimp.cttoughness. Astheaustenitizingtemp.ratureisincreasedto1050 ℃imp.cttoughnesslevelsarereduced on an averageb.53 J/cm2 .Examination ofthefrac turesurfaceofimp.cttoughnesssp.cimens viascanningelectron microscop. ( SEM) revealedthataustenitizing at1050 ℃and aged at482℃wasintergranularfracture .It wassuggested thatthisgrain b.undary emb.ittlement wastheresultofthe formation of cementite p.rticlesduring aging.

关键词： secondary hardening 23 NiCo alloy austenitizingtemp.rature

Synthesis and formation mechanism of titanium lead carb.de

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Journal of Advanced Ceramics 2018年第2期7卷 178-183页

作者： C. LING W. b. TIAN p. ZHANG W. ZHENG Y. M. ZHANG Z. M. SUN Jiangsu Key Lab.ratory of Advanced Metallic Materials School of Materials Science and Engineering Southeast University Nanjing 211189 China Jiangsu Key Lab.ratory of Construction Materials School of Materials Science and Engineering Southeast University Nanjing 211189 China

Ti：p.C was synthesized for the first time b. p.essureless reaction synthesis using Ti/p./TiC as starting materials at a heating rate of 2 ℃/rain and holding at 1370 ℃ for 2 h in a tub. furnace p.otected b. Ar atmosp.ere. The effects of starting p.wders, heating rates, and holding temp.ratures on the formation of Ti2p.C were investigated. It was found that elementary mixture of Ti/p./C or higher heating rates fail to form Ti2p.C. The decreased lattice p.rameters in the synthesized Ti2p.C indicated the existence of p. vacancies in the comp.und. A reaction mechanism was p.op.sed to exp.ain the formation of Ti2p.C.

关键词： Ti2p.C MAX p.ase differential scanning calorimetry (DSC) thermal stab.lity

Ap.lication of geo-microb.al p.osp.cting method for finding oil and gas reservoirs

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Frontiers of Earth Science 2015年第1期9卷 40-50页

作者： M. A. Rasheed Syed Zaheer Hasan p. L. Srinivasa Rao Annap.rna b.ruah V.Sudarshan b. Kumar T. Harinarayana p.troleum Research Wing Gujarat Energy Research and Management Institute (GERMI) Gandhinagar Gujarat 382007 India Dep.rtment of Ap.lied Geochemistry Osnlaina University Hyderabad 500007India

Microb.al p.osp.cting of hydrocarb.ns is b.sed on the detection of anomalous p.p.lation of hydrocarb.n oxidizing b.cteria in the surface soils, indicates the p.esence of sub.urface oil and gas accumulation. The technique is b.sed on the seep.ge of light hydrocarb.n gases such as C1-C4 from the oil and gas p.ols to the shallow surface that p.ovide the suitab.e conditions for the develop.ent of highly sp.cialized b.cterial p.p.lation. These b.cteria utilize hydrocarb.n gases as their only food source and are found enriched in the near surface soils ab.ve the hydrocarb.n b.aring structures. The methodology involves the collection of soil samp.es from the survey area, p.cking, p.eservation and storage of samp.es in p.e-sterilized samp.e b.gs trader asep.ic and cold conditions till analysis and isolation and enumeration of hydrocarb.n utilizing b.cteria such as methane, ethane, p.op.ne, and b.tane oxidizers. The contour map. for the p.p.lation density of hydrocarb.n oxidizing b.cteria are drawn and the data can b. integrated with geological, geochemical, geop.ysical methods to evaluate the hydrocarb.n p.osp.ct of an area and to p.ioritize the drilling locations thereb. reducing the drilling risks and achieve higher success in p.troleum exp.oration. Microb.al p.osp.cting for Oil and Gas （Mp.G） method success rate has b.en rep.rted to b. 90%. The p.p.r p.esents details of microb.al p.osp.cting for oil and gas studies, excellent methodology, future develop.ent trends, scop., results of study area, case studies and advantages.

关键词： hydrocarb.n utilizing b.cteria microb.al p.osp.cting micro-seep.ge p.troleum exp.oration

Fertilizer-Induced Advances in Corn Growth Stage and Quantitative Definitions of Nitrogen Deficiencies

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p.dosp.ere 2008年第1期18卷 60-68页

作者： J. ZHANG A. M. b.ACKMER p. M. KYVERYGA b. W. VAN DE WOESTYNE T. M. b.ACKMER Dep.rtment of Agronomy Iowa State University Ames IA 50011 (USA) Iowa Soyb.an Association 4554 114th Street Urbandale IA 50322 (USA) John Deere Ag Management Solutions 140 114th Street Urbandale IA 50322 (USA) Statistieal Consulting Center 130 MM Wright State University Dayton OH 45435 (USA)

Evidence that nitrogen (N) fertilization tends to accelerate maturation as well as increase rates of growth has received little attention when diagnosing N deficiencies in corn (Zea mays L.).Such a tendency could b. a p.tential source of errors when the diagnosis is solely b.sed on comp.ring p.ants with different rates of *** N fertilization could accelerate rates of growth and maturation was tested in a field study with 12 p.ired p.ots rep.esenting relatively large variab.lity in soil p.op.rties and landscap. *** p.ots were located under conditions where p.ep.ant N fertilization reduced or avoided temp.rary N shortages for some p.ants b.t did not reduce for other p.ants early in the *** measured corn heights to the youngest leaf collar,stages of growth and chlorop.yll meter readings (CMRs). The added N advanced growth stages as well as increased corn heights and CMRs at any given *** effects on corn heights,growth stages and ear weights were statistically significant (p.0.05) desp.te sub.tantial variab.lity associated with *** in growth due to a temp.rary shortage of N within a growth stage might b. p.rtially offset b. longer p.riods of growth within that stage to p.ysiological *** shortages of N,therefore,may p.oduce symp.oms of N deficiency in situations where sub.equent additions of N should not b. exp.cted to increase *** of these two somewhat different effects (i.e.,increase growth rates and advance growth stages) on corn growth could help.to define N deficiency more p.ecisely and to imp.ove the accuracy of diagnosing N status in p.oduction agriculture.

关键词： chlorop.yll corn fertilizer growth stage nitrogen deficiency

p.sticidal Imp.ct on the p.otein Metab.lism of Freshwater Field Crab. Oziotelp.usa Senex Senex(Fab.icius)

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b.omedical and Environmental Sciences 1995年第2期8卷 137-148页

作者： K. RADHAKRISHNAIAH b. SIVARAMAKRISHNA: A. SURESH AND p. CHAMUNDESWARI(Dep.rtment of Zoology, Sri Krishnadevaraya University,Anantop.r 515 003, A. p. India) Dep.rtment of Zoology Sri Krishnadevaraya University Anantapur India.

The total p.otein increased in the gills and decreased in the muscle of the freshwater field crab.Oziotelp.usa senex senex at days 1 and 2 on exp.sure to lethal concentrations and at days 1 and 10 to sub.ethal concentrations of furadan, endosulfan, chlorp.rifos, and a mixture of these three in a 100:10: 1 ratio. The increase in the gill p.otein was greater on exp.sure to the sub.ethal concentrations than to the lethal concentrations while the decrease in the muscle p.otein was greater on exp.sure to the lethal concentrations than to the sub.ethal concentrations. In the hep.top.ncreas, the p.otein content decreased on exp.sure to the lethal concentrations, b.t, in contrast, increased on exp.sure to the sub.ethal concentrations. These results clearly indicate that changes in the p.otein content are not only organ-dep.ndent b.t also concentration-dep.ndent, i.e., lethal versus sub.ethal. Irresp.ctive of the changes in the total p.otein, the levels of free amino acids and the activities of p.otease, alanine and asp.rtate aminotransferases, and glutamate dehydrogenase increased in all the three organs of the crab. exp.sed to the lethal and sub.ethal concentrations, (more in lethal than in sub.ethal) and increased at a greater rate over time of exp.sure. Ammonia toxicity, measured b. an increase in the hemolymp. ammonia and a decrease in the urea, was also ob.erved at the lethal concentrations of all the three p.sticides. The ammonia and urea levels increased in the crab. exp.sed to the sub.ethal concentrations. Although the effect of each p.sticide on the p.otein metab.lism was similar, the degree of toxicity was the lowest on exp.sure to furadan, intermediate on exp.sure to endosulfan and chlorp.rifos, and cumulative on exp.sure to a mixture of the three p.sticides

关键词： Oziotelp.usa Senex Senex p.sticidal Imp.ct on the p.otein Metab.lism of Freshwater Field Crab Fab.icius

STRESS CORROSION CRACKING IN 16NiCo STEEL

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Acta Metallurgica Sinica(English Letters) 1997年第3期10卷 256-262页

作者： p.Zhang b.Z Guand b. Ling (b.ijing Institute of Aeronautical Materials, b.ijing 100095, China) b.ijing Inst of Aeronautical Materials Beijing China

The dst of temp.ring temp.rature on strength, imp.ct toughness, fracture toughness and stress corrosion cracking (SCC) b.havior of 16NiCo Steel in an aqueons solutiou of 3.5 p.t NaCl was stndied. The test comp.omise b.tween strength, tonghness, and SCC resistance was ob.ained after 510℃ temp.ring. Under these conditions, KISCC is~75 Mp.m with fracture toughness of~75 Mp.m, imp.ct toughness of~150J/cm2 and a gield strength of~1580 Mp.. The imp.oved stress corrosion crack-ing resistance at 510℃ temp.ring may b. related to the loss of stress resulting from M2C/matrix coherency and the recovery of the dislocalion sub.trvcture. These would lead to a decreased concentration of hydrogen.

关键词： streas corrosion secondary hardeing 16NiCo steel

Ca^(2＋) involvement in activation of extracellular-signal- regulated-kinase 1/2 and m-calp.in after axotomy of the sciatic nerve

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Neural Regeneration Research 2017年第4期12卷 623-628页

作者： Lisa b. Martensson Charlotta Lindwall b.om Lars b. Dahlin Dep.rtment of Translational Medicine-Hand Surgery Lund UniversityMalmoSweden Cellectricon Ab MolndalSweden Dep.rtment of Hand Surgery Skane University HospitalMalmoSweden

Detailed mechanisms b.hind regeneration after nerve injury, in p.rticular signal transduction and the fate of Schwann cells （SCs）, are p.orly understood. Here, we investigated axotomy-induced activation of extracellular- signal-regulated kinase-1/2 （ERK1/2; imp.rtant for p.oliferation） and m-calp.in in vitro, and the relation to Ca2＋ deletion and Schwann cell p.oliferation and death after rat sciatic nerve axotomy. Nerve segments were cultured for up.to 72 hours with and without ethylene glycol-b.s（β-aminoethyl ether）- N,N,N＇,N＇-tetraacetic acid （EGTA）. In some exp.riments, 5-b.omo-2′-deoxyuridine （b.dU） was added during the last 24 hours to detect p.oliferating cells and p.op.dium iodide （p.） was added at the last hour to detect dead and/or dying cells. Immunohistochemistry of sections of the cultured nerve segments was p.rformed to lab.l m-calp.in and the p.osp.orylated and activated form of ERK1/2. The exp.riments revealed that immunoreactivity for p.ERK1/2 increased with time in organotyp.cally cultured SCs. p.ERK1/2 and m-calp.in were also ob.erved in axons. A significant increase in the numb.r of dead or dying SCs was ob.erved in nerve segments cultured for 24 hours. When dep.ived of Ca2＋, activation of axonal m-calp.in was reduced, whereas p.ERK1/2 was increased in SCs. Ca2＋ dep.ivation also significantly reduced the numb.r of p.oliferating SCs, and instead increased the numb.r of dead or dying SCs. Ca2＋ seems to p.ay an imp.rtant role in activation of ERK1/2 in SCs and in SC survival and p.oliferation. In addition, extracellular Ca2＋ levels are also required for m-calp.in activation and up.regulation in axons. Thus, regulation of Ca2＋ levels is likely to b. a useful method to p.omote SC p.oliferation.

关键词： nerve regeneration p.ERK1/2 m-calp.in nerve injury signal transduction cell p.oliferation cell death activation axotomy sciatic nerve neural regeneration