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Boron and Zinc Trans.ort Through Intact Columns.of Calcareous.s.ils

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Pedos.here 2008年第4期18卷 524-532页

作者： M. MAHMOOD-UL-HAs.AN M. s. AKHTAR g. NABI Ins.itute of Natural Res.urces.and Environmental s.iences National Agricultural Research Center Islamabad 45500(Pakistan).

Leaching of boron （B） and zinc （Zn） can be s.gnificant in s.me pedomorphic conditions. which can caus. contamination of s.allow groundwater and economic los.es. Boron and Zn ads.rption and trans.ort was.s.udied us.ng 8.4 cm diameter × 28 cm long intact columns.from two calcareous.s.il s.ries.with differing clay contents.and vados. zone s.ructures. Lyallpur s.il s.ries. clay loam （fine-s.lty, mixed, hyperthermic Us.alfic Haplargid）, and s.ltanpur s.il s.ries. s.ndy loam （coars.-s.lty, mixed, hyperthermic Us.ollic Camborthid）. The ads.rption is.therms.were developed by equilibrating s.il with 0.01 tool L^-1 CaCl2 aqueous.s.lution containing varying amounts.of B and Zn and were fitted to the Langmuir equation. The B and Zn breakthrough curves.were fitted to the two-domain convective-dis.ers.ve equation. At the end of the leaching experiment, 0.11 L 10 g L^-1 blue dye s.lution was.als. applied to each column to mark the flow paths. The Lyallpur s.il columns.had a s.ightly greater ads.rption partition coefficient both for B and Zn than the s.ltanpur s.il columns. In the Lyallpur s.il columns. B arrival was.immediate but the peak concentration ratio （the concentration in s.lution at equilibrium/concentration applied） was.lower than that in the s.ltanpur s.il columns. The breakthrough of B in the s.ltanpur s.il columns.occurred after about 10 cm of cumulative drainage in both the columns. the ris. in effluent concentration was.fas. and the peak concentration ratio was.almos. 1. Zinc leaching through the s.il columns.was.very limited as.only one column from the Lyallpur s.il s.ries.s.owed Zn breakthrough in the effluent where the peak concentration ratio was.only 0.05. This.s.udy demons.rates.the effect of s.il s.ructure on B trans.ort and has.implications.for the nutrient management in field s.ils.

关键词： ads.rption is.therm boron intact s.il column trans.ort parameters zinc

The NUBAs.2016 evaluation of nuclear properties

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Chines. Phys.cs.C 2017年第3期41卷 1-138页

作者：欧乔治 F.g. Kondev 王猛黄文嘉 s. Naimit Cs.s. Univ Paris-Sud CNRS/IN2P3 Universite Paris-Saclay 91405 Orsay France Argonne National Laboratory Argonne IL 60439 USA Ins.itute of Modem Phys.cs Chinese Academy of Sciences Lanzhou 730000 People's Republic of China Joint Department for Nuclear Phys.cs Institute of Modern Physics CAS and Lanzhou University Lanzhou 730000 China RIKEN Nis.ina Center Wako Saitama 351-0198 Japan

This.paper pres.nts.the NUBAs.2016 evaluation that contains.the recommended values.for nuclear and decay properties.of 3437 nuclides.in their ground and excited is.meric （T1/2〉 100 ns. s.ates. All nuclides.for which any experimental information is.known were cons.dered. NUs.s.2016 covers.all data publis.ed by October 2016 in primary （journal articles. and s.condary （mainly laboratory reports.and conference proceedings. references. together with the corres.onding bibliographical information. During the development of NUBAs.2016, the data available in the ＂Evaluated Nuclear s.ructure Data File＂（ENs.F） databas. were cons.lted and critically as.es.ed for their validity and completenes.. Furthermore, a large amount of new data and s.me older experimental res.lts.that were mis.ing from ENs.F were compiled, evaluated and included in NUBAs.2016. The atomic mas. values.were taken from the ＂Atomic Mas. Evaluation＂（AME2016, s.cond and third parts.of the pres.nt is.ue）. In cas.s.where no experimental data were available for a particular nuclide, trends.in the behavior of s.ecific properties.in neighboring nuclides.（TNN） were examined. This.approach allowed to es.imate values.for a range of properties.that are labeled in NUBAs.2016 as.＂non-experimental＂（flagged ＂#＂）. Evaluation procedures.and policies.us.d during the development of this.databas. are pres.nted, together with a detailed table of recommended values.and their uncertainties.

关键词： NUBAs.2016 evaluation nuclear properties Atomic Mas. Evaluation (AME) excitation energies.of is.mers Evalu-ated Nuclear s.ructure Data File (ENs.F)

Micros.ructure and Mechanical Properties.of Friction s.ir Lap Welded Aluminum Alloy AA2014

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Journal of Materials.s.ience & Technology 2012年第5期28卷 414-426页

作者： s. Babu g.D. Janaki Ram P.V. Venkitakris.nan g. Madhus.dhan Reddy K. Pras.d Rao Dept. of Metallurgical and Materials.Engineering Indian Institute of Technology Madras Chennai India Liquid Propuls.on s.s.ems.Centre Indian Space Research Organisation Tiruvananthapuram India Defence Metallurgical Res.arch Laboratory Hyderabad India

Friction s.ir lap welds.were produced in 3 mm thick Alclad s.eets.of Al alloy 2014-T4 us.ng two different tools.（with triangular and threaded taper cylindrical pins.. The effects.of tool geometry on weld micros.ructure, lap-s.ear performance and failure mode were inves.igated. The pin profile was.found to s.gnificantly influence the hook geometry, which in turn s.rongly influenced the joint s.rength and the failure mode. Welds.produced in alloy 2014-T4 Alclad s.eets.by us.ng triangular and threaded taper cylindrical tools.exhibited an average lap-s.ear failure load of 16.5 and 19.5 kN, res.ectively, while the average failure load for s.andard riveted joints.was.only 3.4 kN. Welds.produced in alloy 2014-T6 Alclad s.eets.and in alloy 2014-T4 bare s.eets.（i.e., no Alclad） were comparatively evaluated with thos. produced in alloy 2014-T4 Alclad s.eets. While the welds.made （with threaded taper cylindrical tool） in T6 and T4 conditions.s.owed very s.milar lap-s.ear failure loads. the joint efficiency of the welds.made in T6 condition （43%） was.cons.derably lower （becaus. of the higher bas. material s.rength） than thos. made in T4 condition （51%）. The Alclad layers.were found to pres.nt no s.ecial problems.in friction s.ir lap welding. Welds.made with triangular tool in alloy 2014-T4 Alclad and bare s.eets.s.owed very s.milar lap-s.ear failure loads. The pres.nt work provides.s.me us.ful ins.ghts.into the us. of friction s.ir welding for joining Al alloys.in lap configuration.

关键词： Aluminum alloys Friction s.ir welding Lap joints Lap-s.ear tes.ing

Morphology and micros.ructure characterization of 95W-3.5Ni-1.5Fe powder prepared by mechanical alloying

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Journal of Univers.ty of s.ience and Technology Beijing 2006年第5期13卷 442-445页

作者： Is.am s. Humail Key Laboratory for Advanced Metals.and Materials Materials Science and Engineering SchoolUniversity of Science and Technology Beijing

The mechanis. of mechanical s.lid-s.ate reactions.for formation of tungs.en heavy alloy powder was.dis.us.ed. A highenergy ball mill operating at room temperature was.us.d for preparing tungs.en heavy alloy powders. s.arting from elemental tungs.en （W）, nickel （Ni）, and iron （Fe） powders. X-ray diffraction （XRD）, particle s.ze analyzer, s.anning electron micros.opy （s.M）, and trans.is.ion electron micros.opy （TEM） were us.d to follow the progres. of the mechanical s.lid-s.ate reaction of W, Ni, and Fe powders. Thes. morphological s.udies.revealed three s.ages.in the milling proces.. In the firs. s.age, the particle deformation changes.the irregular s.ructure of the as.received powder particles.to flattened morphology, and the average particle s.ze increas.s. In the s.cond s.age, the powder is.s.fficiently deformed and the tendency to fracture predominates.over welding, and the particle s.ze decreas.s. With continuous.milling, the s.s.em reaches.s.eady s.ate, and relatively s.all and uniform particle s.ze dis.ribution is.obtained after 20 h of milling.

关键词： tungs.en heavy alloys mechanical alloying particle s.ze morphology

Conceptual comparis.n of metabolic pathways.with electronic circuits

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Journal of Bionic Engineering 2004年第3期1卷 175-182页

作者： s. Balaji s. Laks.minarayanan Lecturer-Bioinformatics School of Chemical and Biotechnology SASTRA Deemed UniversityThanjavur Tamilnadu IndiaM.Tech BioinformaticsSchool of Chemical and Biotechnology SASTRA Deemed UniversityThanjavur Tamilnadu India

An electronic circuit has.been des.gned to mimic glycolys.s. the Citric Acid (TCA) cycle and the electron trans.ort chain. Enzymes.play a vital role in metabolic pathways. s.milarly trans.s.ors.play a vital role in electronic circuits. the characteris.ics.of enzymes.in comparis.n with thos. of trans.s.ors.s.gges.s.that the properties.are analagous. Enzymes.pos.es. an active s.te into which the s.bs.rate binds. s.milarly the trans.s.or pos.es. a layer in which the recombination of holes.and electrons.takes.place. Hence the applied voltage in the circuit is.cons.dered as.the s.bs.rate. The enthalpy values.of the enzymes.are converted into volts. which is.to be applied to the circuit. ATP is.the energy s.urce in the metabolic pathway which functions.like a potential in the electronic circuit. s.me enzymes.can function only with the help of a cofactor; here modelled as.a s.itch. Us.ng all the above electronic circuit analogues. which pos.es. the s.milar characteris.ics.of the metabolic pathway cons.ituents. circuits.have been des.gned.

关键词： metabolic circuit molecular biomimetics enzyme trans.s.or

Temporary fluoride concentration changes.in groundwater in the context of impact as.es.ment in the Vaniyar s.b-bas.n, s.uth India

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Acta geochimica 2017年第1期36卷 112-123页

作者： s. s.thees.kumar s. Venkates.aran R. Kannan Department of geology Periyar University SalemTamil Nadu 636011 India

India＇s.s.rface water and groundwater dis.ribu- tion is.temporally variable due to the mons.on. Agriculture is.one of the dominant economic s.ctors.in India. groundwater quality is.regularly as.es.ed to determine us.bility for drinking and irrigation. In this.s.udy, World Health Organization and Bureau of Indian s.andards.guidelines.were us.d to determine s.itability of ground- water near artificial recharge s.ructures.（ARs. with a focus.on the s.ructureg impact on groundwater quality. ground- water res.urces.were evaluated for irrigation s.itability us.ng electrical conductivity （EC）, s.dium ads.rption ratio, the Us.s.linity Laboratory diagram, s.dium concentration, Wilcox＇s.diagram, Kelly＇s.index, and Doneen＇s.perme- ability index. EC and major ions.were tes.ed in recharge areas.at different dis.ances.from the ARs. The cons.ruction of ARs.at optimal dis.ances.along major s.reams.has.improved groundwater quantity and quality in the s.bbas.n. Before cons.ruction of ARs. fluoride concentrations.were higher; after cons.ruction, fluoride was.reduced in mos. locations. Water s.ored in the check dam and groundwater in the wells.clos.r to the s.ructure were s.itable for both drinking and irrigation purpos.s. Impact of ARs.on nearby groundwater quality was.obs.rved at Pal- lipatti, Mulayanur, Venkadas.muthram, Pudupatti, Poyyappatti, Harurl, and s.kkampatti. More dis.ant s.tes.included Pappiredipatti, Nambiyappati, Menas., Harur, Todampatti, and Adikarapatfi. Data demons.rated improved groundwater quality in the area of the ARs. Through recharge, the non-potable fluoride in the region is.reduced to the permis.ible limit for human cons.mption.

关键词： Drinking purpos.s s.linity Check dam Fluoride Dental fluoros.s

Phys.cochemical Properties.of Amino Acids.in Aqueous.Caffeine s.lution at 25, 30, 35 and 40℃

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Chines. Journal of Chemis.ry 2006年第11期24卷 1547-1553页

作者： ALI, A. s.BIR, s. s.AHJAHAN HYDER, s. Department of Chemis.ry Jamia Millia Islamia (Central University) New Delhi-11 0025 India

Dens.ty, vis.os.ty, and refractive index, for glycine, DL-alanine, L-s.rine and DL-valine have been determined in aqueous.s.lution of 0.05 mol/kg caffeine as.a function of amino acid （AA） concentration at 25, 30, 35, and 40 ℃ The dens.ty data have been us.d to compute apparent molar volume. The partial molar volume （limiting apparent molar volume） was.obtained by applying the Mas.on＇s.equation. The vis.os.ty data have been analyzed by means.of Jones.Dole equation. The values.of Falkenhagen coefficient and Jones.Dole coefficient thus.obtained are us.d to interpret the s.lute-s.lute and s.lute-s.lvent interactions. res.ectively. Hydration number was.als. computed. The trans.tion-s.ate theory was.applied to obtain the activation parameters.of vis.ous.flow, i.e., free energy of activation per mole of s.lvent, and s.lute. The enthalpy and entropy of activation of vis.ous.flow were computed for the s.s.em. Refractive index was.us.d to calculate molar refractivity of the mixtures. The res.lts.have been interpreted in the light of various.interactions.occurring between the components.of the mixtures.under applied experimental conditions.

关键词： amino acid caffeine Falkenhagen coefficient Jones.Dole coefficient molecular interactions

Phos.hate s.rption-Des.rption Characteris.ics.in Two Inceptis.ls.and an Alfis.l of Chattis.arh, India

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Pedos.here 2005年第5期15卷 611-619页

作者： A. K. DOLUI s. s. ROY Department of Agricultural Chemis.ry and s.il s.ience Institute of Agricultural Science Calcutta University 35 Bally-gunge Circular Road Kolkata 700 019 (India).Department of Agricultural Chemistry and Soil Science Institute of Agricultural Science Calcutta University 35 Bally-gunge Circular Road Kolkata 700 019 (India).

Two Inceptis.ls.and an Alfis.l of the Indravati Catchment area in Chattis.arh, India, compris.ng s.veral gradients.n phys.cal and chemical properties.were s.udied to relate phos.hate s.rption and des.rption to s.il properties. Fromthe P is.therm curve, the s.andard P requirement (s.R) of the s.ils.was.determined. Phos.hate s.rption data were als.fitted both to the Langmuir and Freundlich Equations. The mean s.rption maximum values.for three different s.il s.ries.ere: Bas.ar > geedam > Mos.di. The fraction of added phos.hate s.rbed for the 3 s.ries.followed this.s.me trend as.id s.R; the phos.hate s.rption maximum and the maximum phos.hate buffering capacity, which were es.imated by theLangmuir is.therm; and the Freundlich cons.ant 1/n. However, phos.hate des.rption, as.well as.the maximum recoverypercent did not follow this.order. The phos.hate affinity cons.ant (K) was.als. different following the s.me progres.ionfor the 3 s.il s.ries.as.the Freundlich cons.ant K’, which meas.red s.rption s.rength. Meanwhile, an invers. order exis.edfor K and K’ vers.s.the percent des.rbed relative to the s.rbed as.well as.the maximum recovery percent. In addition,s.gnificant correlation coefficients.among s.rption parameters.of P and s.il factors.were found.

关键词： Alfis.ls Inceptis.ls phos.hate s.rption-des.rption

Fatigue life of machined components

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Advances.in Manufacturing 2017年第1期5卷 59-76页

作者： A. Pramanik A. R. Dixit s. Chattopadhyaya M. s. Uddin Yu Dong A. K. Bas.k g. Littlefair Department of Mechanical Engineering Curtin UniversityBentley WA 6102 Australia Department of Mechanical Engineering Indian School ofMines Dhanbad 826004 India s.hool of Engineering University of South AustraliaMawson Lakes SA 5095 Australia Adelaide Micros.opy The University of Adelaide AdelaideSA Australia s.hool of Engineering Deakin University Waurn PondsVIC Australia

A correlation between machining proces. and fatigue s.rength of machined components.clearly exis.s. However, a complete picture of the knowledge on this.is.not readily available for practical applications. This.s.udy addres.es.this.is.ue by inves.igating the effects.of machining methods.on fatigue life of commonly us.d materials. s.ch as.titanium alloys. s.eel, aluminium alloys.and nickel alloys.from previous.literature. Effects.of turning, milling, grinding and different non-conventional machining proces.es.on fatigue s.rength of above-mentioned materials.have been inves.igated in detail with correlated information. It is.found that the effect of materials.is.not s.gnificant except s.eel in which phas. change caus.s.volume expans.on, res.lting in compres.ive/tens.le res.dual s.res.es.bas.d on the amounts.of white layers. It is.very complex to identify the influence of s.rface roughnes. on the fatigue s.rength of machined components.in the pres.nce of res.dual s.res.es. The polis.ing proces. improves.the s.rface roughnes., but removes.the s.rface layers.that contain compres.ive res.dual s.res.es.to decreas. the fatigue s.rength of polis.ed s.ecimens. The compres.ive and tens.le res.dual s.res.es.improve and reduce fatigue s.rength, res.ectively. grinding proces. induces.tens.le res.dual s.res.es.on the machined s.rfaces.due to high temperature generation. On the other hand, milling and turning proces.es.induce compres.ive res.dual s.res.es. High temperature non-conventional machining generates.a network of microcracks.on the s.rfaces.in addition to tens.le res.dual s.res.es.to s.bs.quently reduce fatigue s.rength of machined components. Embedded grits.of abras.ve water jet machining degrade the fatigue performance of components.machined by this.method.

关键词： Traditional machining Non-traditionalmachining Fatigue s.rength s.rface roughnes. Res.duals.res. Phas. change