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Zou, Jun,Fu, Donghui,Gong, Huihui,Qian, Wei,Xia, Wei,Pires, J. Chris,Li, RuiYuan,Long, Yan,Mason, Annaliese S.,Yang, Tae‐,Jin,Lim, Yong P.,Park, Beom S.,Meng, Jinling Blackwell Publishing Ltd 2011 The Plant journal Vol.68 No.2
<P><B>Summary</B></P><P>Interspecific hybridization is a significant evolutionary force as well as a powerful method for crop breeding. Partial substitution of the AA subgenome in <I>Brassica napus</I> (A<SUP>n</SUP>A<SUP>n</SUP>C<SUP>n</SUP>C<SUP>n</SUP>) with the <I>Brassica rapa</I> (A<SUP>r</SUP>A<SUP>r</SUP>) genome by two rounds of interspecific hybridization resulted in a new introgressed type of <I>B.?napus</I> (A<SUP>r</SUP>A<SUP>r</SUP>C<SUP>n</SUP>C<SUP>n</SUP>). In this study, we construct a population of recombinant inbred lines of the new introgressed type of <I>B.?napus</I>. Microsatellite, intron‐based and retrotransposon markers were used to characterize this experimental population with genetic mapping, genetic map comparison and specific marker cloning analysis. Yield‐related traits were also recorded for identification of quantitative trait loci (QTLs). A remarkable range of novel genomic alterations was observed in the population, including simple sequence repeat (SSR) mutations, chromosomal rearrangements and retrotransposon activations. Most of these changes occurred immediately after interspecific hybridization, in the early stages of genome stabilization and derivation of experimental lines. These novel genomic alterations affected yield‐related traits in the introgressed <I>B.?napus</I> to an even greater extent than the alleles alone that were introgressed from the A<SUP>r</SUP> subgenome of <I>B.?rapa</I>, suggesting that genomic changes induced by interspecific hybridization are highly significant in both genome evolution and crop improvement.</P>
Investigation on the failure mechanism of steel-concrete steel composite beam
Guang P. Zou,Pei X. Xia,,Xin H. Shen,Peng Wang 국제구조공학회 2016 Steel and Composite Structures, An International J Vol.20 No.6
The internal crack propagation, the failure mode and ultimate load bearing capacity of the steelconcrete-steel composite beam under the four-point-bend loading is investigated by the numerical simulation. The results of load - displacement curve and failure mode are in good agreement with experiment. In order to study the failure mechanism, the composite beam has been modeled, which part interface interaction between steel and concrete is considered. The results indicate that there are two failure modes: (a) When the strength of the interface is lower than that of the concrete, failure happens at the interface of steel and concrete;(b) When the strength of the interface is higher than that of the concrete, the failure modes is cohesion failure, i.e., and concrete are stripped because of the shear cracks at concrete edge.
Z. P. Zhang,J. D. Liu,K. Q. Qiu,Y. Y. Huang,J. G. Li,X. G. Wang,J. L. Liu,M. Wang,M. K. Zou,Y. Z. Zhou 대한금속·재료학회 2023 METALS AND MATERIALS International Vol.29 No.2
A novel fourth-generation nickel-based single crystal superalloy was bonded by vacuum brazing at 1230 °C, 1260 °C and1290 °C for 60 min using a new type of Co-based filler alloy. The effects of the brazing temperature on the microstructureand mechanical properties of the brazed joint were investigated. The brazed joint was mainly composed of the non-isothermalsolidification zone (M3B2 type-boride, CrB boride, Ni3Bboride and MC carbide), isothermal solidification zone (γ and γ'Phase) and base metal. With the increase of brazing temperature, the volume fraction of borides and γ' phase in the centerof the joint decreased and increased, respectively. The high-temperature tensile test results show that the tensile strength ofthe joints was improved with increasing brazing temperature, and the maximum tensile strength of the joint was 766 MPaafter brazing at 1290 °C for 60 min. Fracture observation shows that the fracture modes of the joints were the same, whichbelongs to the typical quasi cleavage fracture. The element distribution in the joint was homogenized to a certain extent at1290 °C. The segregation of Si and Ru was found, but they were still dissolved in the γ solid solution. The experimentalresults help to better understand the microstructure characteristics of the novel fourth-generation nickel-based single crystalsuperalloy and provide guidance for further optimizing the process parameters of the brazed joint.
Hung, V.,Zou, P.,Rhee, H.W.,Udeshi, Namrata D.,Cracan, V.,Svinkina, T.,Carr, Steven A.,Mootha, Vamsi K.,Ting, Alice Y. Cell Press 2014 Molecular cell Vol.55 No.2
Obtaining complete protein inventories for subcellular regions is a challenge that often limits our understanding of cellular function, especially for regions that are impossible to purify and are therefore inaccessible to traditional proteomic analysis. We recently developed a method to map proteomes in living cells with an engineered peroxidase (APEX) that bypasses the need for organellar purification when applied to membrane-bound compartments; however, it was insufficiently specific when applied to unbounded regions that allow APEX-generated radicals to escape. Here, we combine APEX technology with a SILAC-based ratiometric tagging strategy to substantially reduce unwanted background and achieve nanometer spatial resolution. This is applied to map the proteome of the mitochondrial intermembrane space (IMS), which can freely exchange small molecules with the cytosol. Our IMS proteome of 127 proteins has >94% specificity and includes nine newly discovered mitochondrial proteins. This approach will enable scientists to map proteomes of cellular regions that were previously inaccessible.
Hydrogen Behaviors with different introduction methods in SiC - C Films
N. K. Huang,P. Zou,J. R. Liu,L. Zhang 한국진공학회(ASCT) 2003 Applied Science and Convergence Technology Vol.12 No.S1
SiC-C films were deposited with r. f. magnetron sputtering on substrates followed by argon ion bombardment. These films were then permeated by hydrogen gas under the pressure of 3.23×10^7 ㎩ for 3 hours at temperature of 500K or bombarded with hydrogen ion beam at 5 keV and a dose of 1×10^(18) ions/㎠. SIMS, AES and XPS were used to analyze hydrogen related species, chemical bonding states of C, Si as well as contamination oxygen due to hydrogen participation in the SiC-C films in order to study the different behaviors of hydrogen in carbon-carbide films due to different hydrogen introduction. Related mechanism about the effects of hydrogen on the element of the SiC-C films was discussed in this paper.
Fabrication of Porous Silicon Nanotips by Using Argon Ion-beam Irradiation
Chang Yong Zhan,Yu Zou,Jian-Chun Wu,P. K. Chu 한국물리학회 2013 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.63 No.2
Porous silicon nanotips (NTs) are promising in many applications such as field emission, superhydrophobicity,solar cells and photoluminescence. Ion irradiation can create unique nanostructures in many types of materials at room temperature, and this paper reports the surface morphology of porous silicon irradiated by an Ar+ ion beam. Different porous silicons are irradiated, and the effects of the ion’s angle of incidence on the porous silicon nanostructure are investigated. Highdensity NTs of less than 50 nm in size are observed on the porous silicon. The NT size increases,but NT density decreases, with increasing pore size. The orientation of the NTs can be controlled by adjusting the ion impact. Our results reveal that the NTs located at the thick wall between pores and charges created on the tip during Ar+ ion irradiation are beneficial to the formation of the NTs.
Hydrogen Behaviors with different introduction methods in SiC-C Films
Huang, N.K.,Zou, P.,Liu, J.R.,Zhang, L. The Korean Vacuum Society 2003 Applied Science and Convergence Technology Vol.12 No.1
SiC-C films were deposited with r. f. magnetron sputtering on substrates followed by argon ion bombardment. These films were then permeated by hydrogen gas under the pressure of $3.23\times10^{7}$ Pa for 3 hours at temperature of 500K or bombarded with hydrogen ion beam at 5 keV and a dose of $1\times10^{18}$ ions/$\textrm{cm}^2$. SIMS, AES and XPS were used to analyze hydrogen related species, chemical bonding states of C, Si as well as contamination oxygen due to hydrogen participation in the SiC-C films in order to study the different behaviors of hydrogen in carbon-carbide films due to different hydrogen introduction. Related mechanism about the effects of hydrogen on the element of the SiC-C films was discussed in this paper.
GaN films prepared by middle frequency magnetron sputtering
M. Li,C. W. Zou,M. L. Yin,C. S. Liu,L. P. Guo,D. J. Fu 한국물리학회 2008 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.52 No.-
A middle-frequency (MF) sputter system was developed for the growth of GaN films. The key part of the system is dish-shape twin targets back cooled by refrigerated water and powered by a 40-kHz MF power supply. GaN films prepared on Si(111) by this system were hexagonal in structure. The X-ray diffraction pattern shows (002) as the preference orientation. GaN films produced under optimal conditions have an almost 1:1 N:Ga ratio as determined by energy-dispersive spectroscopy. We obtained a band gap of 3.2 eV by extrapolating absorption plots for GaN films deposited on glass substrate under standard conditions. A middle-frequency (MF) sputter system was developed for the growth of GaN films. The key part of the system is dish-shape twin targets back cooled by refrigerated water and powered by a 40-kHz MF power supply. GaN films prepared on Si(111) by this system were hexagonal in structure. The X-ray diffraction pattern shows (002) as the preference orientation. GaN films produced under optimal conditions have an almost 1:1 N:Ga ratio as determined by energy-dispersive spectroscopy. We obtained a band gap of 3.2 eV by extrapolating absorption plots for GaN films deposited on glass substrate under standard conditions.