Regulation of optical properties and electronic structure of two-dimensionM layered ReS2 materials has attracted much attention due to their potential in electronic devices. However, the identification of structure tr...Regulation of optical properties and electronic structure of two-dimensionM layered ReS2 materials has attracted much attention due to their potential in electronic devices. However, the identification of structure transformation of monolayer ReS2 induced by strain is greatly lacking. In this work, the Raman spectra of monolayer ReS2 with external strain are determined theoretically based on the density function theory. Due to the lower structural symmetry, deformation induced by external strain can only regulate the Raman mode intensity but cannot lead to Raman mode shifts. Our calculations suggest that structural deformation induced by external strain can be identified by Raman scattering.展开更多
[Objective] The paper was to screen the biocontrol agents with good control effects against tobacco bacterial wilt. [Method] The strains with antagonistic activity against tobacco bacterial wilt were isolated from 36 ...[Objective] The paper was to screen the biocontrol agents with good control effects against tobacco bacterial wilt. [Method] The strains with antagonistic activity against tobacco bacterial wilt were isolated from 36 copies of rhizosphere soil sample. The strain with best inhibition effect was identified, and carried out pot test and growth-promoting experiment. [Result] The strain with best inhibtion effect was Tra69, which was identified to be Streptomyces flavogriseus. The fermentation liquid of Tra69 had good control effect against Ralstonia solanacarum, and also had good growth-promoting effect on tobacco. [Conclusion] Tra69 was the biocontrol agent with excellent control effect against R. solanacarum, which could be further developed and used in biological control against tobacco diseases.展开更多
Cucumber green mottle mosaic virus (CGMMV), a member of the Tobamovirus genus, causes a severe disease of cucurbits. In the Moscow region of Russian Federation, the incidence of infection on cucumber plants in greenho...Cucumber green mottle mosaic virus (CGMMV), a member of the Tobamovirus genus, causes a severe disease of cucurbits. In the Moscow region of Russian Federation, the incidence of infection on cucumber plants in greenhouses is high;however, the virus is poorly studied. In this work, the full-length genomes of two pathogenic MC-1 and MC-2 strains of CGMMV isolated from cucumber plants grown in greenhouses in the Moscow region and the attenuated VIROG-43M strain were sequenced. Comparison of VIROG-43M nucleotide sequence with those of the pathogenic strains revealed three missense mutations. Their role in attenuation is discussed. For the first time, in a number of trials conducted under laboratory conditions and in commercial greenhouses, the efficiency of the attenuated VIROG-43M strain as a biocontrol agent for cucumber plant protection resulting in significant yield gain was demonstrated. Phylogenetic analysis with 83 full-length CGMMV coat protein genes isolated in 16 different countries showed that Russian strains are related to isolates from Spain, Greece, USA and Israel.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 61264008,61574080 and 61505085
文摘Regulation of optical properties and electronic structure of two-dimensionM layered ReS2 materials has attracted much attention due to their potential in electronic devices. However, the identification of structure transformation of monolayer ReS2 induced by strain is greatly lacking. In this work, the Raman spectra of monolayer ReS2 with external strain are determined theoretically based on the density function theory. Due to the lower structural symmetry, deformation induced by external strain can only regulate the Raman mode intensity but cannot lead to Raman mode shifts. Our calculations suggest that structural deformation induced by external strain can be identified by Raman scattering.
基金Supported by Key Science and Technology Project of Hubei Tobacco Company(027Y2012-083)
文摘[Objective] The paper was to screen the biocontrol agents with good control effects against tobacco bacterial wilt. [Method] The strains with antagonistic activity against tobacco bacterial wilt were isolated from 36 copies of rhizosphere soil sample. The strain with best inhibition effect was identified, and carried out pot test and growth-promoting experiment. [Result] The strain with best inhibtion effect was Tra69, which was identified to be Streptomyces flavogriseus. The fermentation liquid of Tra69 had good control effect against Ralstonia solanacarum, and also had good growth-promoting effect on tobacco. [Conclusion] Tra69 was the biocontrol agent with excellent control effect against R. solanacarum, which could be further developed and used in biological control against tobacco diseases.
文摘Cucumber green mottle mosaic virus (CGMMV), a member of the Tobamovirus genus, causes a severe disease of cucurbits. In the Moscow region of Russian Federation, the incidence of infection on cucumber plants in greenhouses is high;however, the virus is poorly studied. In this work, the full-length genomes of two pathogenic MC-1 and MC-2 strains of CGMMV isolated from cucumber plants grown in greenhouses in the Moscow region and the attenuated VIROG-43M strain were sequenced. Comparison of VIROG-43M nucleotide sequence with those of the pathogenic strains revealed three missense mutations. Their role in attenuation is discussed. For the first time, in a number of trials conducted under laboratory conditions and in commercial greenhouses, the efficiency of the attenuated VIROG-43M strain as a biocontrol agent for cucumber plant protection resulting in significant yield gain was demonstrated. Phylogenetic analysis with 83 full-length CGMMV coat protein genes isolated in 16 different countries showed that Russian strains are related to isolates from Spain, Greece, USA and Israel.
