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Combinatorial genetics methods for discovering high-order regulatory combinations and engineering genetic drivers for neural differentiation

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Neural Regeneration Research 2021年第12期16卷 2403-2404页

作者： Dawn g.l.Thean Alan S.l.Wong laboratory of Combinatorial genetics and Synthetic Biology School of Biomedical SciencesThe University of Hong KongPokfulamHong Kong Special Administrative RegionChina Department of Electrical and Electronic Engineering The University of Hong KongPokfulamHong Kong Special Administrative RegionChina

Diving into the search for effective cell differentiation factors:Researchers are still striving to find better therapeutics to revert or slow down the progression of neurological disorders such as Parkinson’s disease,Alzheimer’s disease,and Huntington’s *** disorders are the result of neuronal cell death in different parts of the *** or treatments used to relieve the symptoms in patients have not been well *** do not recover the damaged neural tissues and can result in unwanted side effects.

关键词： Huntington neural Alzheimer

Effect of two-step cooling process on mechanical properties of TRIP steel with high performance

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Journal of Iron and Steel Research International 2018年第4期25卷 426-432页

作者： M.l. li H. Jiang Y.l. He l.B. Chen g.T. Zhang H. Wang X.g. lu l. li School of Materials Science and Engineering Shanghai University Shanghai 200072 China State Key laboratory of Advanced Special Steel Shanghai University Shanghai 200072 China Pangang group Research Institute Panzhihua 617000 Sichuan China

A novel two-step cooling experiment was established to simulate the slow cooling process of continuous annealing production line for transformation-induced plasticity （TRIP） steel. The microstructures and mechanical properties of TRIP steel soaked at 700℃ for different time were investigated by tensile test, scanning electron microscopy, X-ray diffraction, and thermodynamic and kinetic calculation. It is shown that the steel soaked for 15 s exhibits the optimal product of strength and elongation （PSE 〉 30,000 MPa%） due to the transformation of austenite to proeutectoid ferrite, which delays the bainite transformation and improves the stability of retained austenite. In addition, the mechanical properties of TRIP steel soaked over 30 s are much lower, resulting from the precipitation of cementite, which decreases the stability of retained austenite and weakens the TRIP effect.

关键词： Transformation induced plasticity steel Two-step cooling Microstructure Mechanical property

Coercivity mechanisms in nanostructured permanent magnets

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Chinese Physics B 2019年第7期28卷 1-13页

作者： g P Zhao l Zhao l C Shen J Zou l Qiu College of Physics and Electronic Engineering & Institute of Solid State Physics Sichuan Normal UniversityChengdu 610066 China State Key luboratory of Metastablc Materials Science and Technology Yunshnn University.Qinhuangdao 066004China Collaborative Innovation Center for Shunxi Advanced Permanent Materials and Technology Lint'en 041004 China

Coercivity mechanism in permanent magnets has been debated for many *** this paper, various models of the coercivity mechanism are classified and re-examined by the comparison and *** rotation and curling models can reveal the underlying reversal mechanism clearly based on isolated grains with elliptic *** contrast, the numerical methods consider inter-grain interactions while simulating the evolution of the spins and hysteresis loops with complicated ***, an exact simulation of magnetic reversal in permanent nanomagnets requires many meshes to mimic the thin domain wall *** and pinning are the two main coercivity mechanisms in permanent *** former signifies the beginning of the magnetic reversal, whilst the latter completes ***, it is proposed that the large difference between the intrinsic magnetic properties of the nucleation centers and those of the main phase can result in a large pinning field(self-pinning), which has the attributes of both traditional nucleation and *** a pinning explains the experimental data of permanent magnets very well, including the enhancement of the coercivity by the grain boundary pinning.

关键词： coercivity mechanism permanent nanomagnets self-pinning

A semi-analytical approach for calculating the equilibrium structure and radial breathing mode frequency of single-walled carbon nanotubes

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Acta Mechanica Sinica 2016年第6期32卷 1075-1087页

作者： J.gong l.Thompson g.li Department of Mechanical Engineering Clemson University

A semi-analytical model for determining the equilibrium configuration and the radial breathing mode (RBM) frequency of single-wall carbon nanotubes (CNTs) is presented. By taking advantage of the symmetry characteristics, a CNT structure is represented by five independent variables. A line search optimization procedure is employed to determine the equilibrium values of these variables by minimizing the potential energy. With the equilibrium configuration obtained, the semi-analytical model enables an efficient calculation of the RBM frequency of the CNTs. The radius and radial breathing mode frequency results obtained from the semi-analytical approach are compared with those from molecular dynamics (MD) and ab initio calculations. The results demonstrate that the semi-analytical approach offers an efficient and accurate way to determine the equilibrium structure and radial breathing mode frequency of CNTs.

关键词： Carbon nanotubes Equilibrium structure Radial breathing mode frequency

Revision of the genus Inouenola lászló,Ronkay & Witt,2010(lepidoptera,Noctuoidea,Nolidae,Nolini) with description of 6 new species

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Journal of Forestry Research 2015年第2期26卷 457-467页

作者： gyula M.lászló gábor Ronkay lászló Ronkay Fadrusz u.25 Budapest 1114Hungary Heterocera Press ltd. Szt.István krt.4Budapest 1137Hungary Department of Zoology Hungarian Natural History Museum

This paper contains the revision of the genus Inouenola la′szlo′,Ronkay ＆ Witt,2010 and presents the checklist of the known taxa and their distribution and the description of six new species（Inouenola brunneolinea... 详细信息

关键词： Inouenola Nolini Nolidae Noctuoidea New species New status South East Asia

Development and Electrochemical Studies of Ruthenium Based Mixed Oxide Catalyst Electrodes for Chlorine Evolution

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Chemical Research in Chinese Universities 2002年第2期18卷 133-138页

作者： l.X.Yang J.P.g.Farr Department of Chemical and Processing Engineering University of Newcastle Merz CourtNewcastle upon Tyne NE17RU School of Metallurgy and Materials The University of Birmingham EdgbastonBirmingham B152TTUK

Experimental results are presented which allow comparison of the electrochemical performance of RuO 2/Ti, Ru 0 3 Sn 0 7 O 2/Ti and Ru 0 3 V 0 7 O 2/Ti catalysts prepared on a titanium substrate by thermal decomposition from respective precursors. The highest activity for chlorine evolution is observed on the Ru 0 3 V 0 7 O 2/Ti electrode, lower on Ru 0 3 Sn 0 7 O 2/Ti and least on RuO 2/Ti. Voltammograms obtained in the polarisable region are used to characterize the different electrodes. Further more an analysis of the catalytic activity and reaction kinetics of the developed electrodes in NaCl are presented.

关键词： Catalyst Cl_(2) evolution Ruthenium oxide

Active-Passive Radiolocation of Dangerous Natural Phenomena

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Advances in Atmospheric Sciences 1990年第3期7卷 376-382页

作者： l.g.Kachurin lenmgrad Hydrometeorological Institute Malookhtinski98195196 LeningradUSSR

In nature one observes strong deviations from thermodynamic *** most dangerous natural phenomena proceeding in a thermodynamically irreversible way,are accompanied by the initiation of nonthermal impulse radio and optical radiation,the intensity and amplitude-frequency characteristics of which may serve as a measure of irrcversihility white making the passive radiolocation and simultaneously as an information characteristic of the degree of the phenomenon's approach to the stage of maximum *** active radiolocation of natural phenomena at the stage of thermodynamic irreversibility has a number of distinct features caused by the high speed of their progress and anomalies of the dielectric properties and accordingly,effective scattering area of natural radio *** above is the physical basis of the method proposed by the author,that of the active-passive radiolocation of dangerous natural phenomena such as thunderstorms-both naturally developing and provoked by flying vehicles or other modifying means,avalanches,landslides,catastrophic atmospheric eddies and showers,sudden destruction of *** and lake ice and so ***-passive radar sounding of cloudiness presumes radical changes in the air traffic control in thunderous situations in the take-off and landing areas of flying vehicles as well as along the *** irreversibility turns out to be an important factor in the process of the interaction of ice with heavy-duty icebreakers(nuclear-powered vessels)causing their anomalous *** non-thermal radio radiator arising at the deformation of ice cover under the pressure of an icebreaker or under the action of wind load,may he used while choosing the route and tactics of the ice-breaker's progress,for the hydrometeorological service of oth-er sea and coastal *** completed investigations of the thermodynamically irreversible natural phenomena have found practical application,but their wide utilization is

关键词：主动-被动无线电定位危险自然现象

RESEARCH ON AS-CAST gRAIN REFININg TECHNOlOgY BY INOCUlATINg ClEAN STEEl WITH TITANIUM OXIDE

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Acta Metallurgica Sinica(English letters) 2003年第5期16卷 379-384页

作者： g.g.Cheng M.l.Wang X.E.Yang Y.l.li Y.g.Wang l.Y.Wang P.Zhao UniversityofScienceandTechnologyBeijing Beijing100083China CentralIronandSteelResearchInstitute Beiiing100081China

Precipitation condition and nucleation of Ti2O3 during solidification of clean steel have been studied. The behavior of Ti2O3 during solidification as well as possibility of using Ti2O3 to refine as-cast grains as heterogeneous nucleation sites is discussed. It is shown that Ti2O3 can be formed provided that the steelmaking and solidification process is controlled strictly. And inoculating clean steel with Ti2O3 is an effective way to refine as-cast grains.

关键词： clean steel solidification Ti2O3 precipitation

Can the growing of transgenic maize threaten protected lepidoptera in Europe?

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Insect Science 2021年第4期28卷 1159-1168页

作者： gábor l.lövei Andreas lang Marco Ferrante Victor Bacle Department of Agroecology Aarhus UniversitySlagelseDenmark Institute of Applied Ecology Fujian Agricultural and Forestry UniversityFuzhouChina Buro lang Zell im WiesentalGermany Department of Environmental geosciences University of BaselBaselSwitzerland Centre for Ecology Evolution and Environmental ChangesAzorean Biodiversity GroupFaculty of Agricultural and Environmental SciencesUniversity of the AzoresAngra do HeroismoPortugal la Painerie Preaux du PerchePerche en NoceFrance

We evaluated whether protected European butterflies can potentially be at risk if transgenic maize is extensively grown in Central *** explored potential consequences of both insect resistant(IR)and herbicide resistant(HR)transgenic *** maize can produce pollen that is toxic to lepidopteran larvae,and this puts butterfly species at possible risk if the presence of young larvae coincides with maize flowering,during which large quantities of maize pollen can be deposited on *** considering the timing of maize flowering in Europe and the phenology of the protected lepidoptera species,we found that 31 species had at least one generation where 50%of the larval stage overlapped with maize flowering,and 69 species for which first instar larvae were present during maize pollen *** maize allows high concentration herbicide treatments on fields without seasonal limitation,which can drastically reduce weed *** cases where such weed species are host plants for protected butterflies,reduced host plant/food availability can result,causing population *** using published information,we first identified the important weed species in major maize-growing European ***,we checked whether the host plants of protected lepidoptera included species that are common maize *** identified 140 protected species having food plants that are common weeds in one or more of the major European maize-growing *** HR maize is grown in Europe,there is a potential hazard that their food plants will seriously decline,causing a subsequent decline of these protected species.

关键词： butterflies conservation environmental risk food plants gM crop pollen toxicity