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Journal of Magnesium and Alloys 2021年第3期9卷 818-828页

作者： l.Y.Zhao H.Yan r.s.Chen en-Hou Han The Group of Magnesium Alloys and Their Applications Institute of Metal ResearchChinese Academy of Sciences62 Wencui RoadShenyang 110016China school of Materials science and engineering University of Science and Technology of China72 Wenhua RoadShenyang 110016China

The grain growth process plays an important role in the texture formation in magnesium *** microstructural and micro-textural evolution of a cold-rolled Mg-Zn-Gd alloy during annealing at 350℃for 60-190 min were tracked by quasi-in-situ electron backscatter diffraction *** results show that grain growth takes place gradually with the annealing time ***,the TD-split texture maintains the texture type but alters in three aspects-the increased tilting angle,the decreased pole intensity and the widened distribution of high-intensity *** with their c-axis tilting 45-70°from normal direction show preferential growth which is closely associated with the texture *** original grain size advantage is one of the important factors leading to the growth advantage,some grain boundaries,such as 50-60°[1^(-)21^(-)0],50-60°[2750],60-70°[1^(-)21^(-)0](18b),and 70-80°[1^(-)01^(-)0](10)are also considered to be related to this preferential growth.

关键词： Grain growth preferential growth Texture static recrystallization Magnesium alloys

Orientations of nuclei during static recrystallization in a cold-rolled Mg-Zn-Gd alloy

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Journal of Materials science & Technology 2021年第1期60卷 162-167页

The static recrystallization process of a cold-rolled Mg-Zn-Gd alloy was tracked by a quasi-in-situ electron backscatter diffraction method to investigate the orientations of *** results show that orientation distribution of nuclei is associated with nucleation *** continuous static recrystallization nuclei display similar orientations to the parent grains with TD ***,discontinuous static recrystallization nuclei formed within the parent grains(TD-45~0 orientation) show random orientations and a variety of misorientation angles but preferred axes or .Interestingly,a special oriented nucleation is *** static recrystallization nuclei originated from boundaries of the parent grain(TD-70° orientation) show concentrated TD orientations in another side due to the preferred misorientation relationship 70°(∑18 b).It is speculated that these two special misorientation relationships are related to the dislocation type.

关键词： Mg alloys Orientation Nucleation Quasi-in-situ EBsD static recrystallization

Coupling textural and stable-isotope variations in fluvial stromatolites:Comparison of pleistocene and recent records in NE spain

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Journal of palaeogeography 2019年第2期8卷 150-169页

作者： C.Arenas M.C.Osácar l.Auqué C.sancho Department of Earth sciences University of Zaragoza Geotransfer Group and Institute for research on environmental sciences of Aragón(IUCA)

Textural and stable isotopic features of two middle pleistocene fluvial stromatolite profiles are compared to a recent stromatolite,both formed in the river piedra system(NE spain),to test the reliability of climatic,hydrologic and depositional information derived from ancient *** pleistocene stromatolites formed in a multi-domed,highly-inclined *** recent stromatolite also formed in a highly-inclined cascade of the river piedra,the sedimentary conditions of which were periodically examined between the years 2000 and *** pleistocene stromatolites are formed of an alternation of 1) thin large-crystal laminae(type A),with elongated crystals up to 1 mm long,and 2) thick small-crystal laminae(type B),consisting of cyanobacterial fan-and bushshaped *** textural and isotopic comparison with the recent stromatolite shows that each A–B couplet corresponds to one *** type-A laminae are comparable to the macrocrystalline laminae that occur in the cool-period deposits of the recent stromatolite,and the type-B laminae are comparable to the warm-period deposits of the recent *** temperatures(Tw),calculated from δ^(18)O_(calcite) and present measures of δ^(18)O_(water),were similar in the pleistocene and recent specimens,and close to the measured river ***,the pleistocene stromatolites formed not far from isotopic equilibrium,as did the recent *** pleistocene δ^(18) O_(calcite) biannual oscillation is wider in amplitude than in the recent stromatolite,which suggests larger differences in Tw through the year in the pleistocene than at *** pleistocene δ^(13)C_(calcite) does not show any pattern;and the values are slightly higher than the recent *** co-evolution of δ^(18)O and δ^(13)C is parallel in the pleistocene stromatolites,matching the recent stromatolite *** results and their comparison with other ancient examples prove that textural and isotopic features in ancient stromatolites

关键词： Tufa recent and ancient stromatolites stable isotopes Biotic and abiotic laminae Intra-annual and inter-annual water temperature variations

Calculation of f_(σ) on Quark level

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Chinese physics letters 1996年第9期13卷 652-655页

作者： lÜXiao-fu lIU Yu-xin ZHAO en-guang Department of physics Sichuan UniversityChengdu 610064 Department of physics Peking UniversityBeijing 100871 Institute of Theoretical physics Chinese Academy of SciencesBeijing 100080

With the recently obtained vacuum configuration of the bilocal field,we have calculated the decay constant f_(σ) of σ-meson in a quantum chromodynamics-based model field *** investigating the calculated result,it ca... 详细信息

关键词： theory decay meson

synthesis of few layer single crystal graphene grains on platinum by chemical vapour deposition

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progress in Natural science:Materials International 2015年第4期25卷 291-299页

作者： s.Karamat s.sonu?en ü.?elik Y.Uysall? E.?zg?nül A.Oral Department of physics Middle East Technical University COMsATs Institute of Information Technology Faculty of engineering and Natural sciences Sabanc? University Nano Magnetics Instruments ltd.

The present competition of graphene electronics demands an ef fi cient route which produces high quality and large area graphene. Chemical vapour deposition technique, where hydrocarbons dissociate in to active carbon species and form graphene layer on the desired metal catalyst via nucleation is considered as the most suitable method. In this study, single layer graphene with the presence of few layer single crystal graphene grains were grown on pt foil via chemical vapour deposition. The higher growth temperature changes the surface morphology of the pt foil so a delicate process of hydrogen bubbling was used to peel off graphene from pt foil samples with the mechanical support of photoresist and further transferred to si O2/si substrates for analysis. Optical microscopy of the graphene transferred samples showed the regions of single layer along with different oriented graphene domains. Two type of interlayer stacking sequences, Bernal and twisted, were observed in the graphene *** presence of different stacking sequences in the graphene layers in fl uence the electronic and optical properties; in Bernal stacking the band gap can be tunable and in twisted stacking the overall sheet resistance can be reduced. Grain boundaries of pt provides low energy sites to the carbon species, therefore the nucleation of grains are more at the boundaries. The stacking order and the number of layers in grains were seen more clearly with scanning electron microscopy. raman spectroscopy showed high quality graphene samples due to very small D peak. 2D raman peak for single layer graphene showed full width half maximum(FWHM) value of 30 cm-1. At points A, B and C, Bernal stacked grain showed FWHM values of 51.22, 58.45 and 64.72 cm-1, while twisted stacked grain showed the FWHM values of 27.26, 28.83 and 20.99 cm-1,respectively. FWHM values of 2D peak of Bernal stacked grain showed an increase of 20–30 cm-1 as compare to single layer graphene which showed its dispersive natu

关键词： Chemical vapour deposition Graphene hexagonal crystals Bernal stacking Twisted stacking Grain boundaries and hydrogen bubbling

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Analysis of non-ionized substance losses in experiments on plasma mass separation

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plasma science and Technology 2022年第8期24卷 124-129页

作者： r A UsMANOV N N ANTONOV A V GAVrIKOV G D lIZIAKIN A D MElNIKOV A p OIlEr V p sMIrNOV r A TIMIrKHANOV l s VOlKOV N A VOrONA laboratory of Electrophysical and plasma Devices Joint Institute for High TemperatureMoscow 125412Russia

plasma mass separation requires a lot of diagnostic techniques that not only demonstrate the separation effect but also show the efficiency of the *** the test experiments,plasma flux to be separated may contain neutral particles that avoid the separation process due to their insensitivity to electromagnetic *** present the diagnostics of the lost substance in experiments on plasma mass *** obtained data of the diagnostics helps determine the law of particle evaporation from the plasma *** show that neutral flux is unable to distort the result of separation *** presented approach can be used in experiments aimed at enhancing the separation effect and achieving target productivity for industry applications.

关键词： plasma mass separation plasma diagnostics lead silver film deposition

s1p: the elixir of life for naive T cells

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Cellular & Molecular Immunology 2018年第7期15卷 657-659页

作者： Michaël pérès Anne Montfort Nathalie Andrieu-Abadie Céline Colacios Bruno ségui INsErM UMr1037 Centre de Recherches en Cancérologie de ToulouseToulouse 31037France Facultéde pharmacie UniversitéToulouse III Paul-SabatierToulouse 31062France laboratoire d’hématologie CHU de ToulouseToulouse 31059France Equipe labellisée ligue Contre le Cancer Toulouse 31037France Correspondence:Professor B SéguiPhDINSERMUMR1037 CRCTCentre de Recherches en Cancérologie de Toulouse2 avenue Hubert CurienToulouse 31037France

During their life,T cells are constantly circulating throughout the ***-1-phosphate(s1p),a sphingolipid metabolite,triggers T cell egress from the thymus and secondary lymphoid organs(slO)into the lymph and the *** phenomenon is dependent on the s1p gradient between lymphoid organs(including thymus and slO)and the lymphatic and blood vessels,which exhibit low,intermediate and high s1p levels,respectively.T cells follow the s1p gradient via the engagement of the G-protein-coupled receptor s1p receptor 1(s1p1)expressed on T cells.1 s1p production is regulated by various sphingolipid-metabolizing *** sphingosine kinases 1 and 2(sKs),encoded by sphk1 and sphk2,phosphorylate the sphingosine(sph)into ***,s1p can be dephosphorylated to sph by s1p phosphatases 1 and 2,encoded by sgpp1 and ***,s1p can be irreversibly degraded by the s1p lyase(spl),encoded by sgpl1,into phosphoethanolamine and hexadecenal.

关键词： organs al. lymphoid

energy-resolved spin filtering effect and thermoelectric effect in topological-insulator junctions with anisotropic chiral edge states

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Frontiers of physics 2022年第6期17卷 85-93页

作者： Jia-en Yang Hang Xie school of Electronics and IoT Chongqing College of Electronic EngineeringChongqing 401331China College of physics Chongqing UniversityChongqing 401331China Chongqing Key laboratory for strongly-Coupled physics Chongqing UniversityChongqing 401331China

Topological edge states have crucial applications in the future nano spintronics *** this work,circularly polarized light is applied on the zigzag silicene-like nanoribbons resulting in the anisotropic chiral edge *** energy-dependent spin filter is designed based on the topological-insulator(TI)junctions with anisotropic chiral edge *** resonance transmission has been observed in the TI junctions by calculating the local current *** some strong Fabry–perot resonances are found leading to the sharp transmission ***,the weak and asymmetric resonance corresponds to the broad transmission *** addition,a qualitative relation between the resonant energy separation Tr and group velocity vf is derived:Tr=πhvf n/l,that indicated Tr is proportional to vf and inversely proportional to the length l of the *** different Tr between the spin-up and spin-down cases results in the energyresolved spin filtering ***,the intensity of the circularly polarized light can modulate the group velocity ***,the intensity of circularly polarized light,as well as the conductor-length,play very vital roles in designing the energy-dependent spin *** the transmission gap root in the Fabry–perot resonances,the thermoelectric(TE)property can be enhanced by adjusting the gap.A schedule to enhance the TE performance in the TI-junction is proposed by modulating the electric field(Ez).The TE dependence on Ez in the nanojunction is investigated,where the appropriate Ez leads to a very high spin thermopower and spin figure of *** TI junctions have potential usages in the nano spintronics and thermoelectric devices.

关键词： electron transport topological edge states 2D materials spintronics thermoelectric effects

Down-regulation of Bcl-X_l by rNA interference suppresses cell growth and induces apoptosis in human esophageal cancer cells

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World Journal of Gastroenterology 2006年第46期12卷 7472-7477页

作者： Yong-en Xie en-Jie Tang Da-rong Zhang Bi-Xuan ren The Institute of Immunology and Molecular Biology North Sichuan Medical College Nanchong 637007 Sichuan Province China

AIM： To determine the inhibitory effect of the vectorgenerated small interfering rNAs （sirNAs） on the expression of the BcI-Xl gene in established human esophageal cancer cells, and to investigate the effect of the BcI-Xl sirNAs on cell growth and apoptosis in esophageal cancer cells. METHODs： Three sirNA-expressing vectors targeting different sites of the Bcl-Xl gene were constructed from pTZ-U6＋I vector. Cultured esophageal cancer cells were transfected with the sirNA-expressing vector （or the control vector） using lipofectamine 2000. BcI-Xl gene expression was determined with semiquantitative rT- pCr assay and Western blotting. Among the three sirNA- expressing vectors, the most highly functional vector and its effect on cell growth and apoptosis in esophageal cancer ceils was further analyzed. rEsUlTs： Of the three sirNA-expressing vectors, sirNA- expressing vector No.1 was the most potent one which suppressed Bcl-Xl mrNA production to 32.5% of that in the untreated esophageal cancer cells. Western blotting analysis showed that sirNA-expressing vector No.1 markedly down-regulated the expression of Bcl-Xl in human esophageal cancer cells. Treatment of esophageal cancer cells with sirNA-expressing vector No.1 resulted in inhibition of cell growth and induction of apoptosis. CONClUsION： Down-regulation of BcI-Xl by vectorgenerated small interfering rNAs can suppress cell growth and induce apoptosis in human esophageal cancer cells.

关键词： Esophageal cancer BcI-Xl rNA Interference Apoptosis

The growing threat of non-alcoholic fatty liver disease-related hepatocellular carcinoma

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Hepatobiliary surgery and Nutrition 2022年第5期11卷 735-737页

作者： Margaret l.p.Teng Kai en Chan Darren J.H.Tan Daniel Q.Huang Division of Gastroenterology and Hepatology Department of MedicineNational University Health SystemSingaporeSingapore Yong loo lin school of Medicine National University of SingaporeSingaporeSingapore

Non-alcoholic fatty liver disease(NAFlD)is the fastest growing cause of hepatocellular carcinoma(HCC)worldwide(1).It is anticipated that the burden of NAFlD-related HCC will continue to increase in tandem with the global obesity epidemic(2,3).This has become a global issue of concern,as liver cancer is associated with significant morbidity and mortality,and is currently the third leading cause of cancer death(4).

关键词： hepatocellular NAFlD liver