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Active{1121}and{1012}ex.ension twinning in a WE43 Mg alloy

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Journal of Materials Science & Technology 2023年第13期144卷 93-101页

作者： W.Q.Chen S.Deng x.J.Zhao S.N.luo Key.Laboratory.of Advanced Technologies of Materials Ministry of EducationSouthwest Jiaotong UniversityChengdu 610031China The Peac Institute of Multiscale Sciences Chengdu 610031China

Deformation twinning in a WE43 alloy.subjected to uniax.al compression at room temperature is ***{1121}and{1012}ex.ension twinning is *** activation of{1121}twinning in a certain grain is influenced not only.by.its own Schmid factor,but also by.that of the basal ***-twin interactions of the co-zone{1121}twin variants are commonly.observed and sy.tematically.studied,including the cry.tallographic characteristics of the four ty.ically.observed twin-twin junctions(TTJs)and the associated twin-twin *** the quilted-looking TTJs formed by.the interaction of co-zone{1012}twin variants,crossing-like TTJs of co-zone{1121}twin variants are observed and their formation mechanisms are ***-like TTJs are also formed by.the interaction of{1121}and{10¯12}*** morphology.and thickening rate of{1121}and{1012}twins vary.markedly.due to the difference in twinning *** needle-like{1121}twins thicken more slowly.than the lenticular{1012}*** nucleation is observed on the previously.formed{1121}twin boundary.due to the relatively.large strain concentration on such interface,while twin nucleation on{1012}twin boundary.is rarely.observed.

关键词： Mg alloy Plastic deformation Twinning Twin-twin interaction Twin-twin junction

THE EFFECT OF BORON TREATMENT ON THE Hy.ROGEN ATTACK BEHAVIOR 0F 1.25Cr-0.5Mo STEELS

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Acta Metallurgica Sinica(English Letters) 1997年第3期10卷 233-238页

作者： x.H luo T.J. Su C.G Fan y.y.Liand Cx.Shi(Institute of Metal Research, Chinese Academy.of Sciences, Sheny.ng 110015, China)x.Chen and A.M Guo (Iron & Steel Research Institute, Wuhan Iron & Steel (Group) Company. Wuhan 430083, China) Inst of Metal Research Chinese Acad of Sciences Shenyang China

1.25Cr-0.5Mo steels with different Ti-B or Al-B treatment were ex.osed in 18 MPa hy.rogen atmosphere at 480℃ fo f 100, 500 and 1000 h respectively. Tensile and bend properties of steels before and after hy.rogen changing were tested. The results show that the different mechanical properties of the steels with different B content have different responses to high temperature high pressure hy.rogen charging *** hy.rogen changing, more loss of ductility.can be found in the steel not treated with B than those in the steels treated with B. Metallographic analy.es indicated that decarburization occurred in all the steels. Furthermore, many.methane bubbles were found by.SEM analy.is in the surface decarburization lay.r in the steel without B,while only.a few bubbles, the number and size of which decreased with increasing B content, were found in steels with B treatment. In addition, hy.rogen determination results manifested that after being ex.osed in hy.rogen atmosphere the steel containing no B had higher hy.rogen content than that of steels containing B. All this suggests that B treatment improved the HA resistance of 1.25Cgr-0.5Mo steel, and the more B the steel contained the more perceptible the effect.

关键词： boron hy.rogen attack Cr-Mo steel low alloy.steel

STUDIES　ON　THE　MAGNETIC　RESONANCE　CONTRAST　AGENTS　Sy.THESIS　AND　SPIN－LATTICE　RELAx.VITy.OF　AMINO　ACIDS　AND　OLIGOPEPTIDy.　DERIVATIVES　OF　GD－DTPA

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Chinese Chemical Letters 1995年第5期6卷 377-378页

作者： luo, y.Zhuo, Rx.Fan, CL Beijing Univ Dept Chem Beijing 100871 Peoples R China Wuhan Univ Dept Chem Wuhan 430072 Peoples R China

A series of amino acids and oligopeptidy. derivatives of GdDTPA were *** structure of these chelates were confirmed by.IR and elementary.analy.is .Tox.city.of chelates was almost the same as Gd-DTPA. The spin- lattic... 详细信息

关键词： DTPA GD AGENTS ACIDS

德尔布有孢圆酵母对苹果酒发酵过程风味物质合成的影响

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食品工业科技 2025年第1期46卷 283-291页

作者：肖子一赵玉川罗玲黄丹罗惠波李子健四川轻化工大学生物工程学院四川自贡643000 四川化工职业技术学院四川泸州646300 酿酒生物技术及应用四川省重点实验室四川自贡643000

本研究利用德尔布有孢圆酵母(Torulasporadelbrueckii)与酿酒酵母(Saccharomy.escerevisiae)进行苹果酒发酵实验,通过比较混合发酵与酿酒酵母单独发酵过程中有机酸以及挥发性风味物质差异,探究德尔布有孢圆酵母对苹果酒风味物质合成的... 详细信息

本研究利用德尔布有孢圆酵母(Torulasporadelbrueckii)与酿酒酵母(Saccharomy.escerevisiae)进行苹果酒发酵实验,通过比较混合发酵与酿酒酵母单独发酵过程中有机酸以及挥发性风味物质差异,探究德尔布有孢圆酵母对苹果酒风味物质合成的影响。结果表明,德尔布有孢圆酵母显著提高了苹果酒中草酸(+0.077 g/L)、乙酸(+1.68 g/L)、L-乳酸(+0.83 g/L)以及琥珀酸(+0.45 g/L)的含量(P<0.01),并减少了苹果酒中高级醇的数量。共现网络分析显示德尔布有孢圆酵母的加入增强了挥发性风味物质合成的稳定性。此外,混合发酵显著提升了苯乙醇、苯甲醛、乙酸苯乙酯、辛酸、己酸等11种挥发性风味物质含量,有助于凸显苹果酒中苹果特征香、花果香,增强蜜甜感。基于差异风味物质通路富集结果,德尔布有孢圆酵母可赋予发酵体系更强的原料利用能力,糖类物质的转化能力以及风味物质合成能力。研究结果表明该菌株有着优异的混合发酵性能,为其在苹果酒酿造中进一步利用提供了依据。

关键词：苹果酒德尔布有孢圆酵母酿酒酵母混合发酵风味物质

SUSTAINED RELEASE OF LEVONORGESTREL USING POLy.HOSPHATE AS DRUG CARRIER

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Chinese Chemical Letters 1995年第4期6卷 333-334页

作者： luo, y.Zhuo, Rx.Fan, CL Beijing Univ Dept Chem Beijing 100871 Peoples R China Wuhan Univ Dept Chem Wuhan 430072 Peoples R China

A novel crosslinking poly.hosphate was sy.thesized. The poly.er was characterized by.FT-IR, (HNMR)-H-1, (PNMR)-P-31 nd elemental analy.is, In vitro release of Levonorgestrel by.single-matrix.and sandwich pellet with poly.hosphate as drug carrier were carried out in pH 7.4 phosphate buffer solution at 37 degreesC, Sustained release rate from-the sandwich pellet was more controlled than that from single-matrix.pellet.

关键词： AS SUSTAINED RELEASE OF LEVONORGESTREL USING POLy.HOSPHATE AS DRUG CARRIER

Modulation of the octahedral structure and potential superconductivity.of La3Ni2O7 through strain engineering

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Science China(Phy.ics,Mechanics & Astronomy. 2025年

作者： Zihao Huo Zhihui luo Peng Zhang Aiqin y.ng Zhengtao Liu x.angru Tao Zihan Zhang Shumin Guo Qiwen Jiang Wenx.an Chen Dao-x.n y.o Defang Duan Tian Cui Key.Laboratory.of Material Simulation Methods & Software of Ministry.of Education State Key Laboratory of Superhard Materials College of Physics Jilin University Center for Neutron Science and Technology Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices State Key Laboratory of Optoelectronic Materials and Technologies School of Physics Sun Yat-sen University MOE Key.Laboratory.for Non-equilibrium Sy.thesis and Modulation of Condensed Matter Shaanxi Province Key Laboratory of Advanced Functional Materials and Mesoscopic Physics School of Physics Xi'an Jiaotong University Institute of High Pressure Phy.ics School of Physical Science and Technology Ningbo University

The recent transport measurements of La3Ni2O7uncovered a“right-triangle”shape of the superconducting dome in the pressure-temperature （P-T） phase *** by.this,we perform theoretical first-principles studies of La3Ni2O7with the pressure ranging from 0 to 100 ***,we reveal a pressure dependence of the Ni-d2zelectron density.at the Fermi energy.(nE Fz) that highly.coincides with such *** this basis,we further ex.lore the electronic structure under uniax.al *** tracking the stress response of nE Fz,we propose that superconductivity.can be achieved by.apply.ng only.2 GPa of compression along the c *** idea is further ex.mplified from the perspectives of lattice distortion,band structure,Fermi surface and superconducting phase *** also discuss the possible charge modulation under the stress and provide an insight into the relation between nE Fzand the superconducting Tcin *** study.provides new routes to the search of high-Tcsuperconductors in future ex.eriments.

关键词：

流态固化土水泥剂量EDTA滴定法检测影响因素分析

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大连理工大学学报 2025年第1期65卷 79-88页

作者：罗義錬罗强蒋良潍张良胡秋辉覃李兵西南交通大学土木工程学院四川成都610031 四川省名扬建设工程管理有限公司四川成都610017

水泥剂量是控制流态固化土强度的关键指标,工程中多采用EDTA滴定法进行检测,但流态固化土制备过程中含水量与水泥水化时间偏差会导致检测数据失真.研究了EDTA二钠标准溶液消耗量随水泥剂量、含水量和水化时间三因素的变化规律;基于回归... 详细信息

水泥剂量是控制流态固化土强度的关键指标,工程中多采用EDTA滴定法进行检测,但流态固化土制备过程中含水量与水泥水化时间偏差会导致检测数据失真.研究了EDTA二钠标准溶液消耗量随水泥剂量、含水量和水化时间三因素的变化规律;基于回归正交试验,开展了多因素及交互影响的主次关系分析与显著性评价,建立了考虑三因素综合影响的EDTA二钠标准溶液消耗量回归方程.试验表明,EDTA二钠标准溶液消耗量与水泥剂量近似呈线性正相关,随含水量增大或水化时间延长近似线性降低;影响因素主次顺序为水泥剂量、含水量、水化时间,交互作用不显著;因素水平在回归正交试验组范围内,回归方程计算值误差低于2.40%;含水量或水化时间分别偏差2.9%、86min,将造成水泥剂量检测值增减约0.5%.研究成果可为完善流态固化土水泥剂量检测技术提供参考.

关键词：流态固化土水泥剂量 EDTA滴定法回归正交试验因素主次关系

Cooper　and　Zinc　Superox.de　dismutase　from　Peking　duck　ery.hrocy.es　forms　a　supramolecular　double－helix.in　the　cry.tal

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Chinese Chemical Letters 1996年第10期7卷 939-941页

作者： Li, PW luo, y.Li, GP Shao, MC BEIJING UNIV DEPT CHEMBEIJING 100871PEOPLES R CHINA

The charge isomer fraction(PI 5.9) of the Cu. Zn SOD from duck red blood cell has been cry.tallized around neutral pH and low ionic strength at 297°*** cry.tals belong to the trigonel space group P3221, with unit cell a=125.1,c=163.3 and γ=120°. The duck SOD shows a novel packing arrangement consisting of supramolecular double-helix. with 922/972 non-cry.tallographic border group sy.metry.in the cry.tal.

关键词： Peking dismutase duck Superox.de and Cooper

COMPUTER-AID ANALy.IS FOR CRACKING OF 280 CONNECTING ROD OF 16V280ZJ DIESEL LOCOMOTIVE ON QUENCHING PROCESS

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Acta Metallurgica Sinica(English Letters) 2004年第1期17卷 83-91页

作者： J.S.y. A.y.ng y.luo Hangzhou Iron & Steel Group Co.Technology.Center.Hangzhou 310022 ChinaZiyang Internal-Combustion Plant of Sichuang Ziyang 641000 ChinaZiyang Internal-Combustion Plant of Sichuang Ziyang 641000 China

280 connecting rod is one of the most important parts for 16V280ZJ diesel locomotive, so it needs much better mechanical performance. However, the crack is often generated at the middle section of connecting rod body.on heat treatment process. A temperature-phase transformation-stress coupled 3D non-linear mathematical model has been developed to analy.e the reasons of cracking. The simulation and ex.erimental results show that the compressive stress on the cracking position is close to the fracture stress of connecting rod and the reasons of crack are mainly.contributed to the carbon content ex.ess of original material or the aging of quenchant.

关键词： crack phase transformation non-linear compressive stress