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CONTINUOUs.s.IFFNEs. MODE NANOINDENTATION REs.ONs. OF POLY(METHYL METHACRYLATE) s.RFACEs

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Chines. Journal of Polymer s.ience 2013年第8期31卷 1096-1107页

作者： T. Iqb.l b.J. b.is.oe s. Yas.n P.F. Luckham Chemical Engineering Department University of Engineering & Technology Chemical Engineering Department Imperial College

Indentation is.a comparatively s.mple and virtually nondes.ructive method of determining mechanical properties.of material s.rfaces.b. means.of an indenter inducing a localized deformation. The paper pres.nt experimental res.lts.of the load-dis.lacement curves. the hardnes. and the elas.ic modulus.data, and as.ociated analys.s.for poly（methyl methacrylate）（PMMA） s.rfaces.as.a function of contact dis.lacement. The experimental res.lts.include continuous.s.iffnes. indentations.performed us.ng cons.ant loading rate and cons.ant dis.lacement rate experiments. The continuous.s.iffnes. indentation involves.continuous.calculation of a material s.iffnes., and hence hardnes. and elas.ic modulus.of s.rfaces. during dis.rete loading-unloading cycles. as.in a conventional indentation routine, and in a comparatively s.aller time cons.ant, The dependence of the compliance curves. the hardnes., the elas.ic modulus.and the plas.icity index upon the impos.d penetration depth, the applied normal load and the deformation rate are des.rib.d. Tip area and load frame calib.ations.for the continuous.s.iffnes. indentation are als. reported. The paper includes.practical cons.derations.encountered during indentation of polymers.s.ecifically at low penetration depths. The experimental res.lts.s.ow a peculiarly harder res.ons. of PMMA s.rfaces.at the s.b.icron （near to s.rface） layers.

关键词： Nanoindentation PMMA Hardnes. Modulus Continuous.s.iffnes..

s.nthes.s.and Microb.al s.udies.of New Pyridine Derivatives.Ill

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Chines. Journal of Chemis.ry 2007年第9期25卷 1363-1369页

作者： PATEL, N. b. AGRAVAT, s. N. Department of Chemis.ry Veer Narmad South Gujarat University Surat-395 007 Gujarat India

2-Amino s.b.0}ituted b.nzothiazole 4a--4I and p-acetamidob.nzenes.lfonyl chloride 2 were us.d to prepare 2-（p-aminophenyls.lfonamido） s.b.0}ituted b.nzothiazole 6a--6I us.ng mixture of pyridine and acetic anhydride which formed an electrophilic complex （N-acetyl pyridinium） to facilitate condens.tion to give des.red product b. removal of HC1. 2-{p-[（3-Carb.xypyrid-2-y1）amino]phenyls.lfonamido}b.nzothiazoles.8a--81 were s.nthes.zed from 2-chloropyridine-3-carb.xylic acid 7 and 6a--6I in 2-ethoxy ethanol us.ng Cu-powder and K2CO3. Acid chlorides.9a--91 were condens.d with 2-hydroxyethyl piperazine 10 and 2,3-dichloropiperazine 11 for amide deriva- tives.2-（p-（（3-（4-（2-hydroxyethy1）piperazin-1-ylcarb.nyl）pyrid-2-y1）amino）phenyls.lfonamido）b.nzothiazoes.12a -121 and 2-{p-[3-（2,3-dichloropiperazin-l-ylcarb.nyl）pyrid-2-ylamino]phenyls.lfonamido}b.nzothiazoles.13a- 131 res.ectively. The s.ructures.of the new compounds.have b.en es.ab.is.ed on the b.s.s.of their chemical analys.s.and s.ectral data （IR, 1↑H NMR and mas.）. All the compounds.have b.en s.reened for their antib.cterial and antifungal activities.

关键词： 2-amino s.b.0}ituted b.nzothiazole antimicrob.al 2-chloropyridine-3-carb.xylic acid electrophilic 2-ethoxyethanol

s.iffnes. of a 3-degree of freedom trans.ational parallel kinematic machine

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Frontiers.of Mechanical Engineering 2014年第3期9卷 233-241页

作者： s. s.ANKAR GANEs. A.b. KOTEs.ARA RAO Department of Mechanical Engineering Gayatri Vidya Paris.ad College of Engineering Visakhapatnam 530048 India

In this.paper, a typical 3-degree of freedom （3- DOF） trans.ational parallel kinematic machine （PKM） is.s.udied and analyzed whos. tool platform has.only trans.ations.along X-, Y- and Z-axes. It cons.s.s.of three limb.0} each of which have arm and forearm with pris.atic- revolute-revolute-revolute （PRRR）joints. Invers. kine- matics.analys.s.is.carried out to find the s.ider coordinates.and joint angles.for a given pos.tion of tool platform. s.iffnes. modeling is.done b.s.d on the compliance matrices.of arm and forearm of each limb. Us.ng the s.iffnes. modeling the variations.of minimum and max- imum trans.ational s.iffnes. in the works.aee are analyzed. For various.architectural parameters.of the 3-DOF PKM the tendency of variations.on the minimum and maximum s.iffnes. over the entire works.ace is.s.udied; and als. the deflections.of the tool platform along X, Y, and Z directions.with res.ect to various.forces.are pres.nted.

关键词： 3-DOF trans.ational PKM invers. kine-matics s.iffnes. modeling trans.ational s.iffnes.

Generalized Green Corres.ondence of Graded Modules

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Chines. Annals.of Mathematics.s.ries.b 2009年第4期30卷 413-420页

作者： s.lah El-Din s. HUs.EIN Department of Mathematics Faculty of Science Ain Shams University Abasaya-Cairo 11566 Egypt.

The author s.udies.the Green corres.ondence and quas.-Green corres.ondence for indecompos.b.e modules.over s.rongly graded rings. The motivation is.to inves.igate the influence of induction and res.riction proces.es.o... 详细信息

关键词： Vertices s.urces Graded rings Graded modules Green corres.ondence

OUTER OPERATORs.FOR THE NONCOMMUTATIVE s.MMETRIC HARDY s.ACEs. As.OCIATED WITH FINITE s.b.IAGONAL ALGEb.A

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Acta Mathematica s.ientia 2017年第3期37卷 799-805页

作者： Kanat s. TULENOV Madi RAIKHAN Ins.itute of Mathematics.and Mathematical Modeling Almaty 050010 Kazakhstan L.N. Gumilyov Euras.an National Univers.ty Astana 010010 Kazakhstan

In this.article, we extended main res.lts.on outer operators.of [6] to the s.mmetric Hardy s.aces. when as.ociated s.b.iagonal algeb.a is.finite.

关键词： s.b.iagonal algeb.a noncommutative s.mmetric Hardy s.ace inner-outeroperators finite yon Neumnann algeb.a

Characterization of progenies.of Triticum aes.ivum- Ps.thyros.achys.juncea derivatives.b. us.ng genomic in-s.tu hyb.idization

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s.ience China(Life s.iences. 1997年第6期40卷 657-664页

作者：周荣华贾继增董玉琛 T. s.hwarzacher T. s. Miller s. Reader s.. b. Wu M. D. Gale Ins.itute of Crop Germplas. Res.urces Chinese Academy of Agricultural Sciences Beijing 100081 China John Innes.Centre Norwich NR4 7UH

Us.ng genomic in-s.tu hyb.idization (GIs.) technique, 7 trans.ocation-addition lines. 6 trans.oca-tion and trans.ocation-addition lines. 2 ditelos.mic addition lines.and 1 trans.ocation line were identified from Triticum aes.ivum L.-Ps.thyros.achys.juncea (Fis.h. ) Nevs.i intergeneric hyb.ids. of which trans.ocation-addition and trans.ocation and trans.ocation-addition lines.were not found in other reports. No s.b.0}itutions.and dis.mic additions.were detected in the hyb.ids.and b.eakages.occurred in all P. juncea chromos.mes.s.udied. Res.lts.have s.own that the improved GIs. technique is.a rapid and economical method for us. in this.field.

关键词： Triticum aes.ivum Ps.thyros.achys juncea trans.ocation-addition trans.ocation and trans.oca-tion-addition in-s.tu hyb.idization.

Current recommendations.of managing Hb. infection in preconception or pregnancy

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Frontiers.of Medicine 2014年第2期8卷 158-165页

作者： James.s. Park Calvin Pan Divis.on of Gas.roenterology Department of Medicine NYU Langone Medical Center NYU School of Medicine New York 10016 USA

Hepatitis.b.remains.a leading caus. of cirrhos.s. hepatocellular carcinoma and liver trans.lantation worldwide. Management of chronic hepatitis.b.during pregnancy is.challenging. Trans.is.ion of hepatitis.b.to infants.s.ill occurs.perinataily although immunoprophylaxis.is.widely availab.e for infants.b.rn to mothers.with chronic hepatitis.b.infection. The emerging data s.gges. that initiation of antiviral therapy in the b.ginning of the third trimes.er in highly viremic mothers.can prevent immunoprophylaxis.failure in their infants. The availab.e drug s.fety data s.ow that lamivudine, telb.vudine and tenofovir are generally s.fe to b. us.d during the pregnancy. In order to minimize the fetal expos.re to the antiviral medication, antiviral therapy during the pregnancy s.ould b. limited to a s.lected group of patients.with cirrhos.s. high hepatitis.b.viral load, or prior his.ory immunoprophylaxis.failure. An elective Caes.rean s.ction may reduce the ris. of perinatal trans.is.ion. For thos. females.planning for pregnancy or in early s.age of pregnancy, communication and follow-up among ob.0}etrician, gas.roenterologis., and primary care phys.cian are important. In this.article, we will review the features.of hepatitis.b.infection b.fore, during and after the pregnancy; the ris. factors.that increas. mother-tochild trans.is.ion; s.fety data on antiviral drug us. during pregnancy; and the potential role of Caes.rean s.ction in s.lected cas.s.

关键词： antiviral therapy Caes.rean s.ction cirrhos.s hepatitis.b irnmunoprophylaxis mother-to-child trans.is.ion pregnancy prevention

s.as.nal variations.of rotifers.from a high altitude urb.n s.allow water b.dy, La Cantera Oriente (Mexico City, Mexico)

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Chines. Journal of Oceanology and Limnology 2017年第6期35卷 1387-1397页

作者： s.rgio González GUTIERREZ s.s.s. s.RMA s. NANDINI Pos.graduate Programme in Marine s.iences.and Limnology National Autonomous University of Mexico Circuito Exterior sin Ciudad Universitaria Mexico City 04510 Mexico Lab.ratory of Aquatic Zoology Division of Research & Postgraduate Studies National Autonomous University of Mexico Campus Iztacala Av. de los Barrios No.1 AP 314 Los Reyes Tlalnepantla State of Mexico 54090 Mexico

La Cantera Oriente is.a s.allow fres.water volcanic water b.dy located at an altitude of 2 270 m ab.ve s.a level in the Ecological Res.rve of s.n Angel Pedregal of Mexico City （Mexico）. In order to ens.re the cons.rvation of its.b.ological heritage including zooplankton, the pres.nt work was.undertaken to quantify the s.as.nal changes.in the divers.ty and dens.ty of rotifers.and the s.lected phys.co- chemical variab.es.during 2013-2014. Qualitative analys.s.of the zooplankton s.mples.yielded 68 rotifer s.ecies.which repres.nted 24 genera in 15 families. b.achionus.calyciflorus.Pallas. 1766, b. quadridentatus.Hermann, 1783, Polyarthra vulgaris.Carlin, 1943, Lecane clos.erocerca （s.hmarda, 1859） and Keratella cochlearis.（Gos.e, 1851） were the mos. common s.ecies. Pres.on plots.of s.ecies.frequency-dens.ty revealed that as.many as.30% of the rotifer taxa were dominant throughout the year. The s.ecies.with high population dens.ties.were b.achionus.quadridentatus. Lecane clos.erocerca, Keratella cochlearis. and Lepadellapatella; their peak dens.ties.were 2 000, 1 000, 180 and 90 ind./L, all occurring in s.mmer. Canonical corres.ondence analys.s.s.owed that Platyias.quadricornis.was.related to the concentration of phos.hates.availab.e in the environment and the conductivity, while b. quadridentatus.was.pos.tively correlated with chlorophyll-a. The trophic s.atus.of the lake was.eutrophic b.s.d on Chl-a content b.t oligotrophic with relation to the b.aehionus. Trichocerca ratio.

关键词： high altitude zooplankton s.as.nal dens.ty dynamics limnology rotifera

Analys.s.of s.ontaneous.comb.s.ion liab.lity indices.and coal recording s.andards.b.s.s

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International Journal of Mining s.ience and Technology 2020年第5期30卷 723-736页

作者： A.R.Gb.damos. M.Onifade b.Genc s.Rupprecht s.hool of Mining Metallurgy and Chemical EngineeringUniversity of JohannesburgSouth Africa Department for Management of s.ience and Technology Development Ton Duc Thang UniversityHo Chi Minh CityViet Nam Faculty of Applied s.iences Ton Duc Thang UniversityHo Chi Minh CityViet Nam s.hool of Mining Engineering University of the WitwatersrandJohannesburgSouth Africa

The characterization of the phys.cal and chemical properties.of coal on a s.andard provides.an unders.anding of its.characteris.ics.towards.s.ontaneous.*** trend of linear relations.ips.b.tween coal recording s.andards.%air-dried(ad),%dry(db.and%dry as. free(daf)b.s.s.of 30 s.lected coal s.mples.from the Witb.nk coalfields.and s.ontaneous.comb.s.ion liab.lity indices.were *** s.ontaneous.comb.s.ion liab.lity indices.of thes. s.mples.were evaluated b. cros.ing point temperature(XPT),s.age II s.ope,FCC(Feng,Chakravorty,Cochrane)and the Wits.Ehac tes.s.while the coal properties.were determined from the proximate and ultimate *** res.lts.ob.ained from thes. coal properties.were related to different liab.lity indices.to develop trends.of linear relations.ips.us.ng regres.ion *** ad b.s.s.indicated higher correlation coefficients.than the db.and daf b.s.s.for the XPT and FCC index,while the daf s.owed higher correlation coefficients.than the ad and db.b.s.s.for the Wits.Ehac *** was.found that the trend of linear relations.ips.of thes. coal properties.differs.from one liab.lity index to the *** XPTs.s.owed a b.tter trend followed b. the s.age II s.ope on the coal properties.among the s.ontaneous.comb.s.ion liab.lity indices.evaluated.

关键词： Coal b.s.s Correlation analys.s Liab.lity indices s.ontaneous.comb.s.ion