In order to compare the contemporary and genetic variation effect on Arabidop-sis thaliana treated with N+ implantation and 7-ray radiation, the authors did some statistical comparison on the germinating rate and the ...In order to compare the contemporary and genetic variation effect on Arabidop-sis thaliana treated with N+ implantation and 7-ray radiation, the authors did some statistical comparison on the germinating rate and the development period, and analyzed the content of soluble proteins, the activity of some enzymes, isoenzymes profile, and along with the variation in genome DNA of two generations by RAPD. With N+ implantation there was an analogical 'saddle model' relationship between doses and the plant development, soluble proteins, the activity of some enzymes and isoenzymes profile. A certain connection might exist between the similar dose-effect relations among enzymes activity, isoenzymes profile and content of soluble proteins. Maybe, there also exists a certain connection between the mutants of development period and that of DNA variations, between the hereditability of the effect of N+ implantation on the isoenzymes, the activities of enzymes and the hereditability of DNA variations. So it is presumed that the implanted ions, maybe, have participated in metabolism process of organism including that of genome DNA, to consequently affect vital process, such as the changes of gene structure, gene expression manner and gene repair mechanism, and finally result in mutation on phenotype and molecular level. Furthermore, the results definitely showed that mutagenic mechanism induced by N+ implantation is very complicated and is much different from that induced by traditional 7-ray radiation.展开更多
The photoneutron reaction^(18)Ta(y,3m)(178m,g)Ta was investigated with the beam from the NSC KIPT electron linear accelerator LUE-40.The measurements were performed using the residual y-activity method.The bremsstrahl...The photoneutron reaction^(18)Ta(y,3m)(178m,g)Ta was investigated with the beam from the NSC KIPT electron linear accelerator LUE-40.The measurements were performed using the residual y-activity method.The bremsstrahlung flux-averaged cross sections((E_(γmax))>.(r(E_(γmax))>m.<r(E_(γmax))g and the isomerie ratio of the re-action products d(E_(γmax))were measured.The theoretical values of the averaged cross-sections and isomeric ratio were calculated using the partial cross-sections from the TALYS1.95 code for different level density models LD 1-6..The obtained experimental d(E_(γmax))agree with the data in the lterature,but differ from the theoretical values in ab-solute magnitude and the behavior of the energy dependence.A comparison of the determined averaged cross-sec-tions with the calculated cross sections showed the best agreement for the case of the LD 5 model.展开更多
基金The project supported by the National Natural Science Foundation of China (No. 10435020)the project of backbone youth teachers in high Colleges of Education Department of China Central Government
文摘In order to compare the contemporary and genetic variation effect on Arabidop-sis thaliana treated with N+ implantation and 7-ray radiation, the authors did some statistical comparison on the germinating rate and the development period, and analyzed the content of soluble proteins, the activity of some enzymes, isoenzymes profile, and along with the variation in genome DNA of two generations by RAPD. With N+ implantation there was an analogical 'saddle model' relationship between doses and the plant development, soluble proteins, the activity of some enzymes and isoenzymes profile. A certain connection might exist between the similar dose-effect relations among enzymes activity, isoenzymes profile and content of soluble proteins. Maybe, there also exists a certain connection between the mutants of development period and that of DNA variations, between the hereditability of the effect of N+ implantation on the isoenzymes, the activities of enzymes and the hereditability of DNA variations. So it is presumed that the implanted ions, maybe, have participated in metabolism process of organism including that of genome DNA, to consequently affect vital process, such as the changes of gene structure, gene expression manner and gene repair mechanism, and finally result in mutation on phenotype and molecular level. Furthermore, the results definitely showed that mutagenic mechanism induced by N+ implantation is very complicated and is much different from that induced by traditional 7-ray radiation.
文摘The photoneutron reaction^(18)Ta(y,3m)(178m,g)Ta was investigated with the beam from the NSC KIPT electron linear accelerator LUE-40.The measurements were performed using the residual y-activity method.The bremsstrahlung flux-averaged cross sections((E_(γmax))>.(r(E_(γmax))>m.<r(E_(γmax))g and the isomerie ratio of the re-action products d(E_(γmax))were measured.The theoretical values of the averaged cross-sections and isomeric ratio were calculated using the partial cross-sections from the TALYS1.95 code for different level density models LD 1-6..The obtained experimental d(E_(γmax))agree with the data in the lterature,but differ from the theoretical values in ab-solute magnitude and the behavior of the energy dependence.A comparison of the determined averaged cross-sec-tions with the calculated cross sections showed the best agreement for the case of the LD 5 model.
