Genetic segregation analysis for mature seed culturability was conducted using recombinant inbred lines derived from a cross of indica rice, Yangdao 6 and Pei＇ai 64s. Three indices of seed culturability, the frequenc...Genetic segregation analysis for mature seed culturability was conducted using recombinant inbred lines derived from a cross of indica rice, Yangdao 6 and Pei＇ai 64s. Three indices of seed culturability, the frequency of callus induction, the frequency of brown callus and the increase of callus weight were investigated. A combined genetic map constructed with simple sequence repeat （SSR）, sequence tag site （STS）, cleaved amplified polymorphic sequences （CAPS） and single nucleotide polymorphism （SNP） markers covered a total distance of 1 732.5 cM, averaging approximately 12 cM between two neighboring loci. Three QTLs on chromosomes 7, 7 and 10 were detected for the frequency of callus induction; three QTLs on chromosomes 6, 7 and 9 were detected for the frequency of brown callus; and two QTLs on chromosomes 5 and 7 were detected for the increase of callus weight. Common QTLs mapped at the interval flanking RM5481 and RM6835 on chromosome 7 were identified to be involved in the frequency of callus induction and the frequency of brown callus, explaining 7.29% and 12.52% of phenotypic variation, respectively. A total of 14 epistatic effects were detected for the three indices of mature seed culturability. ~展开更多
We perform first-principles calculation to study the transport properties of the acid dopped on C(4,4) carbon nanotube coupled to two C(4,4) carbon nanotube electrodes using the non-equilibrium Green formalism combine...We perform first-principles calculation to study the transport properties of the acid dopped on C(4,4) carbon nanotube coupled to two C(4,4) carbon nanotube electrodes using the non-equilibrium Green formalism combined with the density-functional theory. In particular, we just consider the acid of glycine and alanine molecule dopped on 8 layers C(4,4) carbon nanotube sandwiched between two C(4,4) carbon nanotube electrodes. It is found that the equilibrium conductance of the pure C(4,4) carbon nanotube at Fermi energy is close to 2 G0, two eigenchannels which contribute to the equilibrium conductance are fully open. Both of the two types dopping reduce the conductivity of the carbon nanotube. Compared with the alanine molecule, the alanine influence the transport properties of the C(4,4) carbon nanotube much more greatly. At non-equilibrium, with the increase of the applied bias voltage, more visible current differences appear between the glycine and alanine molecule, which may have the potential use to distuguish the acid of glycine and alanine molecules. A detailed analysis of the transmission coefficient of the eigenchannels, the projected density of states are made to reveal the mechanism of the differences.展开更多
The molecular dynamics simulation calculation on the microclusters evolution properties of liquid Mg3Ca7 during the rapid solidifications has been performed. Results indicated that the icosahedron mieroeluster played ...The molecular dynamics simulation calculation on the microclusters evolution properties of liquid Mg3Ca7 during the rapid solidifications has been performed. Results indicated that the icosahedron mieroeluster played key role in the glass transition which happened at about 600 K; it suggests that the formation and evolution mechanism of ieosahedral order is important for the corrosion resistance of medical implant material of Mg- and Mg-Ca based alloys. It is also found that the icosahedron structure is unstable in the liquid and supercooled liquid until the glass transition occurs.展开更多
The finite element numerical models of the microbubble with and without shell are built in our study.The calculation results indicate that the frequency response of the shell-microbubble is different from that of micr...The finite element numerical models of the microbubble with and without shell are built in our study.The calculation results indicate that the frequency response of the shell-microbubble is different from that of microbubble without shell.Furthermore,the frequency response of microbubble is closely related to the relevant parameters of the shell.The thickness and the Young's modulus willinfluence the frequency response.The increase of the thickness or the Young's modulus of the shell leads to the increase of the resonance frequency and the decrease of the oscillation amplitude of the microbubble.展开更多
基金supported by grants from the Natural Science Fund for Distinguished Young ScholarsZhejiang Province+2 种基金China(Grant No.LR12C06001)Project of Transgenic CropsChina(Grant No.2011ZX08001)
文摘Genetic segregation analysis for mature seed culturability was conducted using recombinant inbred lines derived from a cross of indica rice, Yangdao 6 and Pei＇ai 64s. Three indices of seed culturability, the frequency of callus induction, the frequency of brown callus and the increase of callus weight were investigated. A combined genetic map constructed with simple sequence repeat （SSR）, sequence tag site （STS）, cleaved amplified polymorphic sequences （CAPS） and single nucleotide polymorphism （SNP） markers covered a total distance of 1 732.5 cM, averaging approximately 12 cM between two neighboring loci. Three QTLs on chromosomes 7, 7 and 10 were detected for the frequency of callus induction; three QTLs on chromosomes 6, 7 and 9 were detected for the frequency of brown callus; and two QTLs on chromosomes 5 and 7 were detected for the increase of callus weight. Common QTLs mapped at the interval flanking RM5481 and RM6835 on chromosome 7 were identified to be involved in the frequency of callus induction and the frequency of brown callus, explaining 7.29% and 12.52% of phenotypic variation, respectively. A total of 14 epistatic effects were detected for the three indices of mature seed culturability. ~
基金National Natural Science Foundation of Chinagrant number:10904148
文摘We perform first-principles calculation to study the transport properties of the acid dopped on C(4,4) carbon nanotube coupled to two C(4,4) carbon nanotube electrodes using the non-equilibrium Green formalism combined with the density-functional theory. In particular, we just consider the acid of glycine and alanine molecule dopped on 8 layers C(4,4) carbon nanotube sandwiched between two C(4,4) carbon nanotube electrodes. It is found that the equilibrium conductance of the pure C(4,4) carbon nanotube at Fermi energy is close to 2 G0, two eigenchannels which contribute to the equilibrium conductance are fully open. Both of the two types dopping reduce the conductivity of the carbon nanotube. Compared with the alanine molecule, the alanine influence the transport properties of the C(4,4) carbon nanotube much more greatly. At non-equilibrium, with the increase of the applied bias voltage, more visible current differences appear between the glycine and alanine molecule, which may have the potential use to distuguish the acid of glycine and alanine molecules. A detailed analysis of the transmission coefficient of the eigenchannels, the projected density of states are made to reveal the mechanism of the differences.
文摘The molecular dynamics simulation calculation on the microclusters evolution properties of liquid Mg3Ca7 during the rapid solidifications has been performed. Results indicated that the icosahedron mieroeluster played key role in the glass transition which happened at about 600 K; it suggests that the formation and evolution mechanism of ieosahedral order is important for the corrosion resistance of medical implant material of Mg- and Mg-Ca based alloys. It is also found that the icosahedron structure is unstable in the liquid and supercooled liquid until the glass transition occurs.
文摘The finite element numerical models of the microbubble with and without shell are built in our study.The calculation results indicate that the frequency response of the shell-microbubble is different from that of microbubble without shell.Furthermore,the frequency response of microbubble is closely related to the relevant parameters of the shell.The thickness and the Young's modulus willinfluence the frequency response.The increase of the thickness or the Young's modulus of the shell leads to the increase of the resonance frequency and the decrease of the oscillation amplitude of the microbubble.
