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MODELING OF DYNAMIC RECRYSTALLIZATION OF Ti6A14V ALLOY USING A CELLULAR AUTOMATON APPROACH

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Acta Metallurgica Sinica(English Letters) 2008年第4期21卷 260-268页

作者： j.w. Zhao H. Ding w.j. Zhao F.R. Cao H.L. Hou Z.Q. Li School of Materials and Metallurgy Northeastern University Shenyang 110004 China Beijing Aeronautical Manufacturing Technology Research Institute Beijing 100024 China

A cellular automaton （CA） model is established to simulate dynamic recrystallization （DRX） in the β single-phase field of Ti6Al4 V alloy, and the kinetics during DRX processing has been analyzed. The model employed considers the influences of dynamic recovery, nucleation rate, strain rate and dislocation density on DRX, and practical deformation parameters, such as temperature, strain and strain rate on DRX have been considered in the simulation. The simulated DRX grain size and DRX grain shape agree well with the experimental results, which shows the availability and lea- sibility of the cellular automaton method for the simulation of DRX. The result of kinetics analysis of DRX reveals that the Avrami exponent is variable ranging from 2.4 to 2.9, which increases with the increase of strain rate.

关键词： Ti6A4 V alloyi Dynamic recrystallization Kinetics Modeling Cellular automaton

Vud, Vus, THE CABIBBO ANGLE, AND CKM UNITARITY

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Chinese Physics C 2016年第10期40卷 710-713页

作者： E. Blucher w.j. Marciano Univ. of Chicago BNL

The Cabibbo-Kobayashi-Maskawa （CKM） [1,2] threegeneration quark mixing matrix written in terms of the wolfenstein parameters （λ, A, p, η） [3] nicely illustrates the orthonormality constraint of unitarity and cen...

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Baryon resonance analysis from SAID

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Chinese Physics C 2009年第12期33卷 1063-1068页

作者： R. A. Arndt w. j. briscoe M. w. Paris I. I. Strakovsky R. L. workman Center for Nuclear Studies Department of Physics The George Washington University Washington D.C. 20052 USA

we discuss the analysis of data from πN elastic scattering and single pion photo- and electroproduction. The main focus is a study of low-lying non-strange baryon resonances. Here we concentrate on some difficulties ... 详细信息

关键词： non-strange baryons N(1440) pion-nucleon elastic scattering pion photo- and electro-production

THE MUON ANOMALOUS MAGNETIC MOMENT

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Chinese Physics C 2016年第10期40卷 635-638页

作者： A. Hoecker w.j. Mar- ciano CERN BNL

The Dirac equation predicts a muon magnetic moment, M→=gμe/2mμS^→, with gyromagnetic ratio gμ = 2. Quantum loop effects lead to a small calculable deviation from gμ = 2, parameterized by the anomalous magnetic m...

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Antimicrobial Activity of Ulva reticulata and Its Endophytes

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journal of Ocean University of China 2016年第2期15卷 363-369页

作者： Dhanya K.I. Swati V.I. Vanka Kanth Swaroop Osborne w.j. School of Biosciences and Technology lilT UniversityVellore-632014lndia

Seaweeds are known to exhibit various antimicrobial properties, since it harbours an enormous range of indigenous bioactive compounds. The emergence of drug resistant strains has directed to the identification of prospective metabolites from seaweed and its endophytes, thereby exploiting the properties in resisting bacterial diseases. The current study was aimed to assess the antimicrobial activity of extracts obtained from Ulva reticulate, for which metabolites of Ulva reticulata and its endophytes were extracted and assessed against human pathogens like Staphylococcus aureus, Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi, and Bacillus subtilis. It was observed that the hexane extract of isolate VITDSj2 was effective against all the tested pathogens but a significant inhibition was observed for Staphylococcus aureus and Escherichia coli. Further, Gas chromatography coupled with Mass spectroscopy （GC-MS） revealed the existence of phenol, 3, 5-bis （1, 1-dimethylethyl） in the crude hexane extract which is well-known to possess antibacterial activity. The effective isolate VITDSj2 was identified to be the closest neighbour of Pseudomonas smtzeri by phenotypic and genotypic methods. The crude extracts of the seaweed Ulva reticulata was also screened for antibacterial activity and the hexane extract was effective in showing inhibition against all the tested pathogens. The compound in the crude extract of Ulva reticulata was identified as hentriacontane using GC-MS. The extracts obtained from dichloromethane did not show significant activity in comparison with the hexane extracts. Hence the metabolites of Ulva reticulata and the bacterial secondary metabolites of the endophytes could be used in the treatment of bacterial infections.

关键词： endophytic bacteria anti-microbial macroalgae bioactive compounds GC-MS

CHARACTERIZATION OF Si_(1-x-y)Ge_xC_y FILMS GROwN BY ION IMPLANTATION AND SUBSEQUENT SOLID PHASE EPITAXY

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Acta Metallurgica Sinica(English Letters) 2002年第1期15卷 49-52页

作者： X.Q. Liu Y.Y. wang w.j. Cheng j. Zhang S.Y. Ma Dept. of Phys. Lanzhou Univ. Lanzhou 730000 China

Si1-x-yGexCy ternary alloy films were grown on monocrystalline silicon substrates by C+ ion implantation and subsequent solid phase epitaxy (SPE). Two-step annealing technique was employed in the SPE. The structure and electrical properties of the alloy films were determined using Fourier transform infrared spectroscopy and van der Pauw Hall measurements, respectively. with the optimization of two-step annealing technique for the implanted Si1-x-yGexCy layers, a certain amount of C atoms occupied substitutional sites and no SiC was formed.

关键词： Si1-x-yGexCu film ion implantation SPE

Gene therapy for spinal muscular atrophy:perspectives on the possibility of optimizing SMN1 delivery to correct all neurological and systemic perturbations

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Neural Regeneration Research 2025年第7期20卷 2011-2012页

作者： Sharon j.Brown Rafael j.Yáñez-Muñoz Heidi R.Fuller School of Pharmacy and Bioengineering Keele UniversityKeeleUK wolfson Center for Inherited Neuromuscular Disease TORCH BuildingRJAH Orthopaedic HospitalOswestryUK *** Center of Gene and Cell TherapyDepartment of Biological SciencesSchool of Life Sciences and the EnvironmentRoyal Holloway University of LondonEghamUK

Spinal muscular atrophy(SMA)is a genetic condition that results in selective lower motor neuron loss with concomitant muscle weakness and *** genetic cause of SMA was understood in 1995 when loss or impairment of the survival motor neuron 1(SMN1)gene was identified as the main contributing factor(Lefebvre et al.,1995).This,in combination with the discovery that humans have a“back-up”gene,SMN2,which can produce low levels(approximately 10%)of the full-length functional SMN protein,has led to the generation of SMA-specific gene *** was traditionally classified according to age of symptom onset and developmental milestones achieved,with life expectancy and severity varying between ***,SMN2 copy number is used as a proxy for the prediction of disease severity,with higher SMN2 copy number typically being associated with reduced severity of SMA,although this relationship is not absolute:some individuals with low SMN2 copy number have less severe SMA phenotypes and vice ***,the etiology of SMA is further complicated by other factors,such as non-typical nucleotide variants and SMN2-independent modifiers of disease severity.

关键词： atrophy traditionally absolute

First-principles Calculation Assisted Thermodynamic Modeling of Ti-Co-Cu Ternary System

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journal of Materials Science & Technology 2010年第4期26卷 317-326页

作者： Y.j. Yang X.M. Tao w.j. Zhu Z.H. Long H.S. Liu Z.P. jin School of Materials Science and Engineering Central South University Changsha 410083 China Key Lab of Non-ferrous Metal Science and Engineering Ministry of Education Changsha 410081 China

Thermodynamic assessment of Ti-Co-Cu ternary system has been carried out by combining first-principle calculation and CALPHAD method. Firstly, formation enthalpies of stable and hypothesized compounds were calculated by first-principles method. Then, based on reported experimental information, a thermodynamic description of the Ti-Co-Cu ternary system was performed. Solution phases were treated as substitutional solutions of which excess Gibbs energies were formulated by Redlich-Kister polynomial, and the intermediate phases were described with sublattice models. All measured isothermal sections were reasonably reproduced. In addition, liquidus projection of this ternary system was further calculated, which may be useful for relevant materials processing.

关键词： First-principle CALPHAD Thermodynamic modeling

women in visual neural regeneration research

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Neural Regeneration Research 2025年第2期20卷 489-490页

作者： Tonia S.Rex David j.Calkins Vanderbilt Eye Institute Vanderbilt University Medical CenterNashvilleTNUSA

The year 2024 marks the 60^(th)anniversary of Title IX and 25 years since the New York Times revealed bias against female faculty members at the Massachusetts Institute of *** take an opportunity here to examine the state of gender bias in a relatively new yet already prominent field,neural regeneration in the visual system,for which there is a well-defined context useful for this *** National Eye Institute(NEI)provided the first round of research funding for its Audacious Goals Initiative(AGI)on visual neural regeneration in 2013 and the last round in ***,we focus on this *** sources included PubMed,the National Science Foundation(NSF),the NEI,the Blue Ridge Institute for Medical Research and data from the major professional organization for eye and vision research,the Association for Research in Vision and Ophthalmology(ARVO).

关键词： neural visual Times