The Ru-free and Ru-containing single crystal superalloys were cast in the directionally solidified furnace,while other alloying element contents were basically kept unchanged.The effects of Ru on the solidification ch...The Ru-free and Ru-containing single crystal superalloys were cast in the directionally solidified furnace,while other alloying element contents were basically kept unchanged.The effects of Ru on the solidification characteristic and microstructures of single crystal superalloy were investigated with differential scanning calorimetry,electron probe micro analyzer,energy-dispersive X-ray spectroscope,scanning electron microscope and transmission electron microscope.The results show that the liquidus temperature of the single crystal superalloy decreases with Ru addition.The primary dendrite arm spacing and volume fraction of γ/γ＇ eutectic both decrease with Ru addition.The sizes of γ＇ phase of dendritic core and interdendritic region have no obvious change with Ru addition.Ru tends to segregate slightly in the dendritic core.The extent of elements segregation decreases with the Ru addition.Ru tends to partition preferentially into the γ matrix.The addition of Ru decreases the partition ratio（the ratio of the γ phases composition over the γ＇ phases composition） of elements Re,W and Mo.展开更多
The BEG of charged pions is investigated in the framework of O（4） linear sigma model. By using Cornwall- Jackiw-Tomboufis formalism, we have derived the gap equations for the effective masses of the mesons at finite...The BEG of charged pions is investigated in the framework of O（4） linear sigma model. By using Cornwall- Jackiw-Tomboufis formalism, we have derived the gap equations for the effective masses of the mesons at finite temperature and finite isospin density. The critical temperature and phase diagram of BEG are discussed in the non-chiral limit at Hartree approximation.展开更多
By decomposing the distribution functions and color field to regular and fluctuation parts,the solution of the semi-classical kinetic equations of quark-gluon plasma is analyzed.Through expanding the kinetic equations...By decomposing the distribution functions and color field to regular and fluctuation parts,the solution of the semi-classical kinetic equations of quark-gluon plasma is analyzed.Through expanding the kinetic equations of the fluctuation parts to third order,the nonlinear permittivity including the self-interaction of gauge field is obtained and a rough numerical estimate is given out for the important k=0 modes of the pure gluon plasma.展开更多
We have studied the effect of the third-order density fluctuations in the medium on the collective excitations in quark-gluon plasma.We show that the nonlinear response of a quark-gluon plasma medium leads to non-Abel...We have studied the effect of the third-order density fluctuations in the medium on the collective excitations in quark-gluon plasma.We show that the nonlinear response of a quark-gluon plasma medium leads to non-Abelian collective excitations.We present two kinds of non-Abelian oscillation solutions which respectively correspond to weakly and strongly nonlinear coupling of field components in the color space.We also show that the weakly nonlinear solution is similar to the Abelian-like one but has a frequency shift,which is of order g^(2)T,from the eigenfrequency.展开更多
The boroxine-linked organic aluminum compound LAl[OB（3-C4H3O）]2（μ-O） was accomplished by reacting LAl H2 {L =（Z）-4-[（2,6-diisopropylphenyl）amino]pent-3-en-2-ylidene-2,6-diisopropylaniline} with furan-3-ylboro...The boroxine-linked organic aluminum compound LAl[OB（3-C4H3O）]2（μ-O） was accomplished by reacting LAl H2 {L =（Z）-4-[（2,6-diisopropylphenyl）amino]pent-3-en-2-ylidene-2,6-diisopropylaniline} with furan-3-ylboronic acid in good yield.The title compound belongs to the orthorhombic system,space group Pnma with a = 10.9774（15）,b = 19.369（3）,c = 17.362（3） A,V = 3691.5（9） A^3,C37H47 Al B2N2O5,Mr = 648.37,Z = 4,Dc = 1.167 Mg/m^3,μ（Mo Kα） = 0.097 mm^–1,F（000） = 1384,S = 1.000,the final R = 0.0589 and w R = 0.1445 for 9138 observed reflections（I 〉 2σ（I）） and R = 0.0683 and w R = 0.1517 for all data.This compound is an unique example of a spiro-centered aluminum atom,showing the inorganic Al O3B2 ring fused to the organic C3N2 part.It was characterized by 1H NMR,IR,elemental analysis,and single-crystal X-ray structural analysis.Furthermore,the compound was studied by TG analysis as well as DSC.展开更多
目的:筛选女贞子-黄芪药对抗癌治疗的主要活性成分,预测活性成分的作用靶点,建立药物成分-活性成分-作用靶点网络,进一步探讨女贞子-黄芪药对抗癌治疗的潜在作用机制。方法:采用中药系统药理学技术平台(TCMSP)中筛选女贞子-黄芪的潜在...目的:筛选女贞子-黄芪药对抗癌治疗的主要活性成分,预测活性成分的作用靶点,建立药物成分-活性成分-作用靶点网络,进一步探讨女贞子-黄芪药对抗癌治疗的潜在作用机制。方法:采用中药系统药理学技术平台(TCMSP)中筛选女贞子-黄芪的潜在活性成分,采用Dis Ge NET数据库与人类孟德尔遗传数据库(Online Mendelian Inheritance in Man,OMIM)预测和筛选其治疗癌症的作用靶点,采用omicshare平台(http://www. omicshare. com/)对药物靶点和疾病靶点进行匹配。借助Cytoscape软件构建"药物-活性成分-关键作用靶点"网络。采用String数据库构建蛋白质相互作用网络。采用DAVID数据库对女贞子-黄芪关键作用靶点进行生物功能及代谢通路分析。结果:通过筛选得到33个药物活性成分,共涉及203个作用靶点,与疾病靶点有关的活性成分为14个,主要通过调控ERBB2,AR,SRC,EGFR,ESR1等靶蛋白及癌症中的蛋白多糖通路、癌症通路、癌症中的微小mRNA(micro RNA)等通路等发挥抗癌治疗作用。结论:女贞子-黄芪药对对癌症的治疗作用体现了中药多成分-多靶点-多途径的特点,为阐释其抗癌治疗的作用机制与物质基础提供了科学依据。展开更多
文摘The Ru-free and Ru-containing single crystal superalloys were cast in the directionally solidified furnace,while other alloying element contents were basically kept unchanged.The effects of Ru on the solidification characteristic and microstructures of single crystal superalloy were investigated with differential scanning calorimetry,electron probe micro analyzer,energy-dispersive X-ray spectroscope,scanning electron microscope and transmission electron microscope.The results show that the liquidus temperature of the single crystal superalloy decreases with Ru addition.The primary dendrite arm spacing and volume fraction of γ/γ＇ eutectic both decrease with Ru addition.The sizes of γ＇ phase of dendritic core and interdendritic region have no obvious change with Ru addition.Ru tends to segregate slightly in the dendritic core.The extent of elements segregation decreases with the Ru addition.Ru tends to partition preferentially into the γ matrix.The addition of Ru decreases the partition ratio（the ratio of the γ phases composition over the γ＇ phases composition） of elements Re,W and Mo.
基金The project supported in part by National Natural Science Foundation of China under Grant Nos.10547112 and 10675052
文摘The BEG of charged pions is investigated in the framework of O（4） linear sigma model. By using Cornwall- Jackiw-Tomboufis formalism, we have derived the gap equations for the effective masses of the mesons at finite temperature and finite isospin density. The critical temperature and phase diagram of BEG are discussed in the non-chiral limit at Hartree approximation.
基金Supported by the National Natural Science Foundation of China under Grant No.19775017.
文摘By decomposing the distribution functions and color field to regular and fluctuation parts,the solution of the semi-classical kinetic equations of quark-gluon plasma is analyzed.Through expanding the kinetic equations of the fluctuation parts to third order,the nonlinear permittivity including the self-interaction of gauge field is obtained and a rough numerical estimate is given out for the important k=0 modes of the pure gluon plasma.
基金Supported by the National Natural Science Foundation of China under Grant No.19775017.
文摘We have studied the effect of the third-order density fluctuations in the medium on the collective excitations in quark-gluon plasma.We show that the nonlinear response of a quark-gluon plasma medium leads to non-Abelian collective excitations.We present two kinds of non-Abelian oscillation solutions which respectively correspond to weakly and strongly nonlinear coupling of field components in the color space.We also show that the weakly nonlinear solution is similar to the Abelian-like one but has a frequency shift,which is of order g^(2)T,from the eigenfrequency.
基金supported by the National Natural Science Foundation of China(No.21001016)the Beijing Natural Science Foundation(No.2132044)Beijing High School Youth Talent Project(YETP1191)
文摘The boroxine-linked organic aluminum compound LAl[OB（3-C4H3O）]2（μ-O） was accomplished by reacting LAl H2 {L =（Z）-4-[（2,6-diisopropylphenyl）amino]pent-3-en-2-ylidene-2,6-diisopropylaniline} with furan-3-ylboronic acid in good yield.The title compound belongs to the orthorhombic system,space group Pnma with a = 10.9774（15）,b = 19.369（3）,c = 17.362（3） A,V = 3691.5（9） A^3,C37H47 Al B2N2O5,Mr = 648.37,Z = 4,Dc = 1.167 Mg/m^3,μ（Mo Kα） = 0.097 mm^–1,F（000） = 1384,S = 1.000,the final R = 0.0589 and w R = 0.1445 for 9138 observed reflections（I 〉 2σ（I）） and R = 0.0683 and w R = 0.1517 for all data.This compound is an unique example of a spiro-centered aluminum atom,showing the inorganic Al O3B2 ring fused to the organic C3N2 part.It was characterized by 1H NMR,IR,elemental analysis,and single-crystal X-ray structural analysis.Furthermore,the compound was studied by TG analysis as well as DSC.
文摘目的:筛选女贞子-黄芪药对抗癌治疗的主要活性成分,预测活性成分的作用靶点,建立药物成分-活性成分-作用靶点网络,进一步探讨女贞子-黄芪药对抗癌治疗的潜在作用机制。方法:采用中药系统药理学技术平台(TCMSP)中筛选女贞子-黄芪的潜在活性成分,采用Dis Ge NET数据库与人类孟德尔遗传数据库(Online Mendelian Inheritance in Man,OMIM)预测和筛选其治疗癌症的作用靶点,采用omicshare平台(http://www. omicshare. com/)对药物靶点和疾病靶点进行匹配。借助Cytoscape软件构建"药物-活性成分-关键作用靶点"网络。采用String数据库构建蛋白质相互作用网络。采用DAVID数据库对女贞子-黄芪关键作用靶点进行生物功能及代谢通路分析。结果:通过筛选得到33个药物活性成分,共涉及203个作用靶点,与疾病靶点有关的活性成分为14个,主要通过调控ERBB2,AR,SRC,EGFR,ESR1等靶蛋白及癌症中的蛋白多糖通路、癌症通路、癌症中的微小mRNA(micro RNA)等通路等发挥抗癌治疗作用。结论:女贞子-黄芪药对对癌症的治疗作用体现了中药多成分-多靶点-多途径的特点,为阐释其抗癌治疗的作用机制与物质基础提供了科学依据。
