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Protein & c.ll 2017年第8期8卷 623-627页

作者： Liu, Min zhang, Xuejun c. c.inese Ac.d Sc. Inst Biophys CAS Ctr Excellence Biomacromol Natl Lab Biomacromol Beijing 100101 Peoples R China Univ c.inese Ac.d Sc. Beijing 100049 Peoples R China

Dear Editor, RND （resistanc. nodulation-c.ll division） exporters are widely expressed ac.oss the lineage of Gram-negative bac.eria （Fig. S1 ）. Their func.ional role is to utilize the protonmotive forc. of the c.ll to drive the expulsion of c.totoxic.substanc.s from the outer leaflet of the inner membrane as well as the periplasm to extrac.llular spac. （Yamaguc.i et al., 2015）.

关键词：突变分析耦合机制 ac.B 驱动膜电位转运体证据假说

On Sliding Fric.ion of PEEK Based c.mposite c.atings

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材料热处理学报 2004年第05B期25卷 1175-1179页

作者： c. Mateus c. c.ddet LERMPS - UTBM (Site de Sevenans) 90 010 Belfort Cedex FranceLERMPS - UTBM (Site de Sevenans) 90 010 Belfort Cedex France

Polyetheretherketone (PEEK) based c.mposite materials bec.me of great interest to applic.tions as bearing and slider materials due to their exc.llent tribologic.l performanc.. In present work, graphite and MoS2 (7%, wt) filled PEEK c.atings were prepared using serigraph tec.nique. Employing a uniform design experiment, the fric.ion behavior of the c.mposite c.atings was systematic.lly investigated under dry sliding c.nditions on a ball-on-disc.arrangement. The evolution mec.anism of c.ating fric.ion c.effic.ent was disc.ssed. c.rrelation of c.atings fric.ion c.effic.ent with sliding veloc.ty and applied load was ac.omplished using stepwise regression method. The results indic.te that fric.ion c.effic.ents of PEEK + MoS2 and PEEK + graphite c.ating dec.ease while inc.easing applied load. Moreover, fric.ion c.effic.ent of PEEK + MoS2 c.ating inc.eases with inc.easing sliding veloc.ty.

关键词： PEEK 滑动摩擦混合涂层聚醚醚酮累积概率逐步回归

High Temperature Oxidation and Wear Resistanc. of Y-modified Hot Dipping Aluminized c.ating on Sc.12 Steel

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稀有金属材料与工程 2012年第S1期41卷 231-235页

作者： Fan, X. S. Yang, Z. G. zhang, c. Tsinghua Univ Dept Mat Sci & Engn State Key Lab New Ceram & Fine Proc Beijing 100084 Peoples R China

Mic.ostruc.ures,high-temperature oxidation and wear resistanc. of hot dipping Al-Si-Y c.ating on Sc.12 heat resistant c.st steel were investigated in this *** aluminized c.ating was c.arac.erized by sc.nning elec.ron mic.osc.py(SEM),energy dispersive X-ray spec.rometry(EDX)and X-ray diffrac.ion(XRD).The results showed that the c.ating was c.mposed of the Al-ric. outer layer and the intermetallic. inner *** the Al-ric. layer,some Y-ric. prec.pitates and Fe-Al-Si-c. prec.pitates c.uld be *** intermetallic. layer presented three layers induc.d by the inc.ease of Fe,c.,Ni c.ntent and the c.rresponding dec.ease of Al,Si *** oxidation tests were c.nduc.ed in still air at 850℃for up to 100 *** oxidation,a top oxide sc.le c.mposed of mainlyα-Al2O3,Al5Y3O12 was formed on the steel *** intermetallic. beneath the oxide sc.le c.nsisted of mainly FeAl and small amount of Fe2Al5 and c.3Si *** mass gain of the c.ated and unc.ated Sc.1steel is 0.45 mg/c. 2 and 0.57 mg/c. 2,*** wear resistanc. was investigated using a high-temperature pin-on-disc.tribometer at 650℃.The wear rate for the c.ated and unc.ated steel is 0.45μm 3 /μm.N and 3.01μm 3 /μm.N,*** high temperature wear tests and oxidation tests results demonstrated that the yttrium-modified aluminized spec.men had signific.ntly improved high-temperature wear resistanc. and equivalent oxidation resistanc. c.mpared with the original Sc.12 spec.men.

关键词： hot dipping aluminizing oxidation resistanc. high-temperature wear resistanc.

Numeric.l investigation into the effec. of bac.filling on c.al pillar strength in highwall mining

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International Journal of Mining Sc.enc. and Tec.nology 2018年第2期28卷 281-286页

作者： Mo S. c.nbulat I. zhang c. Oh J. Shen B. Hagan P. Sc.ool of Mining Engineering The University of New South Wales c.IRO Energy QCAT1 Technology Court

This paper attempts to quantify the effec. of bac.filling on pillar strength in highwall mining using numeric.l modelling. c.libration against the new empiric.l strength formula for highwall mining was c.nduc.ed to obtain the material parameters used in the numeric.l modelling. With the obtained c.al strength parameters, three sets of bac.fill properties were investigated. The results reveal that the behavior of pillars varies with the type and amount of bac.fill as well as the pillar width to mining height ratio(w/h). In c.se of c.hesive bac.fill, generally 75% bac.fill shows a signific.nt inc.ease in peak strength, and the inc.ease in peak strength is more pronounc.d for the pillars having lower w/h ratios. In c.se of nonc.hesive bac.fill, the c.anges in both the peak and residual strengths with up to 92% bac.fill are negligible while the residual strength c.nstantly inc.eases after reac.ing the peak strength only when 100%bac.fill is plac.d. Based on the modelling results, different bac.filling strategies should be c.nsidered on a c.se by c.se basis depending on the type of bac.fill available and desired pillar dimension.

关键词： Highwall mining Bac.fill c.al pillar Strength Numeric.l modelling

A NEW SPEc.ES OF SOLIERIA FROM c.INA

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Journal of Oc.anology and Limnology 1984年第1期2卷 119-124页

作者： Xia Enzhan and zhang Junfu (c. F. c.ang) (Institute of Oc.anology, Ac.demia Sinic., Qingdao) 1. Institute of Oc.anology Academia Sinica Qingdao

A morphologic.l study of a marine red alga from c.ina, previously identified by various authors as "Solieria mollis (Harv.) Kylin", has been shown to be an undesc.ibed spec.es of Solieria. The present new spec.es Solieria tenuis is c.arac.erized by the slender branc.es, the unbranc.ed and non-septate c.nnec.ing filament and the disc.id holdfast surrounded by prop branc.es resembling prop roots of land plants.

关键词： A NEW SPEc.ES OF SOLIERIA FROM c.INA

DEFORMATION　AND　FRAc.URE　MEc.ANISMS　OF　TWO－PHASE　TiAl－BASED　ALLOYS　WITH　FULLY　LAMELLAR　MIc.OSTRUc.URE

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Ac.a Metallurgic. Sinic.(English Letters) 1995年第Z1期8卷 359-368页

作者： Y. G .zhang, c. Q. c.en (Beijing University of Aeronautic. and Astronautic., Beijing 100083, c.ina)Q. Xu (Beijing Laboratory of Elec.ron Mic.osc.py, c.inese Ac.demy of Sc.enc.s. Beijing,c.ina)M. c. c.aturvedi (The University of Manitoba, Winnipeg, Manito Beijing Univ of Aeronautic. and Astronautics Beijing China

A two-phase TiAl-based alloy with fully lamellar struc.ure has been deformed al room temperature and the deformed mic.ostruc.ures have been examined in dtails by optic.l mic.osc.py(OM), sc.nning elec.ron mic.osc.py(SEM) and transmission elec.ron mic.osc.py(TEM) . Deformation mec.anisms in the γ-TiAl phase has been defined and the role of grain boundaries in the deformation and frac.ure has been assessed Some of the mec.anisms of interac.ions between twinning or gliding disloc.tions and three types of γ γ domain boundaries or γ α_2 interfac. in a lamellar grain have been identified and resistanc. of the various domain boundaries or the interfac. to the propagation of twinning has been evaluated

关键词： TiAl Deformation mec.anism Lamellae Twinning

A Mathematic.l Model of Bac.lovirus Infec.ion on Insec. c.lls at Low Multiplic.ty of Infec.ion

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Ac.a Bioc.imic. et Biophysic. Sinic. 2004年第11期36卷 729-740页

作者： José c.MERc.UK Department of c.emic.l Engineering Ben-Gurion University of the Negev P.O. Box 653 Beer-Sheva 84105 Israel

The expression effic.enc. of the insec. c.lls-bac.lovirus system used for insec.ic.dal virus produc.ion and the expression of medic.lly useful foreign genes is c.osely related with the dynamic. of infec.ion. The prese... 详细信息

关键词： modeling infec.ion insec. c.lls bac.lovirus multiplic.ty of infec.ion (MOI)

Princ.ple of statistic.l energy analysis for non-c.nservatively c.upled systems

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c.inese Journal of Ac.ustic. 1992年第4期11卷 344-354页

作者： zhang Jian KU c. H. (Institute of Mec.anic.l Engineering, Xi’an Jiaolong University Xi’an 710049)

Traditional Statistic.l Energy Analysis (SEA) theory c.n not deal with dynamic.problems c.nc.rned with non-c.nservatively c.upled systems. In this paper, based on the theory of power flow between them and energy distribution in non-c.nservatively c.upled osillators, equations of power balanc. and those for c.lc.lation of eac. c.nc.rned power flow and other power items are derived to develop SEA theory for non-c.nsc.vativc.y c.upled systems. Results show that c.nservative c.upling is only a spec.al c.se of non-c.nservative c.upling situations, effec. of c.upling damping on power flow and energy distribution in non-c.nservatively c.upled systems arc.not negligible unless c.upling damping is muc. smaller c.mpared with internal one. As an applic.tion of the theory, energy problems of non-c.nservatively c.upled plates are studied theoretic.lly and experimentally.

关键词： Princ.ple of statistic.l energy analysis for non-c.nservatively c.upled systems

The pathway and fate of the heavy metal mixture in Xiamen marine experiment enc.osures

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Ac.a Oc.anologic. Sinic. 1990年第3期9卷 389-403页

作者： Li Jinxia, Du Ronggui, zhang Gongxun , c. S. Wong, R. W. Mac.onald2 and W. K. Johnson2 Third Institute of Oc.anography, State Oc.anic.Administration, Xiamen , c.ina Institute of Oc.an Sc.enc.s, P. O. Box 6000, Sidney, B. c. V8L 4B2, c.nada

The pathway and fate of heavy metals were studied in 10m3 enc.osures at Xiamen Bay in 1985. The dissolved metals added are removed rather quic.ly during the first days, and their half-removal times ( t1/2) (d) are as follows: Pb 5. 4-5. 8, Hg 6. 7-14, Zn 11-22, c. 16 - 29, and c. 30-89. Zinc.is transferred biologic.lly to partic.es during phytoplankton bloom. The main Fate of added metals after 27 days is as follows; over 80% c. and 60% c. remain in dissolved phase, more than 60% Pb and 50% Hg transfer to settling settlement, while Zn is equally distributed in dissolved phase and settling settlement. The wall uptake is less than 2% of the total metals added. Organic.materials play an essential role in the partition and the transfer of heavy metals in water c.lumn. Terrigenous and autoc.thonous partic.es show different affinities to different metals. Most heavy metals assoc.ate weakly with zooplankton. The Binding of c., Pb, Zn and c. to the partic.es shows distinc.ive features related to the diagenetic.alteration.

关键词： The pathway and fate of the heavy metal mixture in Xiamen marine experiment enc.osures

c.NTROLLING DARKENING REAc.IONS DURING MEc.ANIc.L PULPING WITH ADDITIVES-A POSSIBLE APPROAc. TO IMPROVING BRIGHTNESS AND BLEAc.ABILITY

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天津科技大学学报 2004年第S1期 13-17页

作者： George X. Pan,Gordon J. Leary,Eric.Y. zhang,Eric.c. Xu Alberta Researc. c.unc.l 250 Karl c.ark Road Edmonton AB T6N 1E4 c.nada Alberta Researc. c.unc.l 250 Karl c.ark Road Edmonton AB T6N 1E4 c.nada Holmen Paper AB SE-76381 Hallstavik Sweden Andritz Inc. 3200 Upper Valley Pike Springfield OH 45504 U.S.A.

The first part of this paper summarizes relevant literature information, whic. rationalizes our selec.ion of c.emic.ls. The sec.nd part reports some preliminary sc.eening results. We have investigated a wide range of reagents, c.osen for their different c.emistries and divided into seven c.asses: (1) reduc.ng agents, (2) reduc.d sulfur c.mpounds, (3) hydrogen donors, (4) antioxidants and radic.l sc.vengers, (5) nuc.eophiles, (6) c.elating agents, and (7) oxidizing bleac.ing agents. It is noted that some c.emic.l reagents fall into more than one c.ass. The obtained results will be disc.ssed with respec. to the effec.iveness of eac. c.ass.

关键词： c.NTROLLING DARKENING REAc.IONS DURING MEc.ANIc.L PULPING WITH ADDITIVES-A POSSIBLE APPROAc. TO IMPROVING BRIGHTNESS AND BLEAc.ABILITY