Tomato seeds （Lycopersicon esculentum L. Mill. cv. zhongshu No. 6） were treated by magnetized plasma before being sown to investigate its effect on the growth and yield of tomatoes. Biochemical analysis showed that ...Tomato seeds （Lycopersicon esculentum L. Mill. cv. zhongshu No. 6） were treated by magnetized plasma before being sown to investigate its effect on the growth and yield of tomatoes. Biochemical analysis showed that dehydrogenase activity increased with the increase of the current but decreased when the current was higher than 1.5 A. The activities of peroxidase （POD） isoenzyme changed in the same pattern. There was no difference in germination percentage between treatments and control, which were carried out in laboratory conditions. However, significant （c~ = 0.01） difference was observed in germination percentage in the pot experiment. In the pot experiment, the sprouting rate for the treatment with a 1.5 A current was 32.75%, whereas the untreated was only 4.75% on the eleventh day. Germination time is more than one day earlier than the control. The 1.5 A treatment increased the tomato yield by 20.7%.展开更多
The diffuse reflectance Fourier trmisfonn infrared spectra of the boron nitride(BN)films deposited on steels by remote microwave plasma chemical vapour deposition(CVD)from borazine with nitrogen,hydrogen and argon wer...The diffuse reflectance Fourier trmisfonn infrared spectra of the boron nitride(BN)films deposited on steels by remote microwave plasma chemical vapour deposition(CVD)from borazine with nitrogen,hydrogen and argon were investigated in the wavenumber range of 400-4000 cm^(-1).It was found that the cubic BN for million depends on production of the intermediate species of cyclo triborazane((BH2NH2)3)and its dehydrogenntion.The structuml bonds of cydotriborazane are similar to that of cubic BN.OptiinUiu conditions for deposited BN films were found to be the bora,zine-nitrogen mixture at the substrate tempera.ture of 550℃.The BN films were n mixture of crystalline cubic BN accounting for the major content and hexagonal BN with relatively low hydrogen content.展开更多
The investigation into the electronic stopping power of heavy ions in solids is very important for the modification processes of material surfaces using ion beams. For lowand high-velocity ions, the electronic stoppin...The investigation into the electronic stopping power of heavy ions in solids is very important for the modification processes of material surfaces using ion beams. For lowand high-velocity ions, the electronic stopping power can be calculated in the light of some theories, but for intermediate-velocity ions, so far there has not been any theory available except the empirical formula put forward by Ziegler, Biersack and Littmark (ZBL). This is because in this velocity range the ions are partially stripped and展开更多
基金National Natural Science Foundation of China (No. 5017700) and the Natural Science Foundation ofShanxi Province (No. 20051078)
文摘Tomato seeds （Lycopersicon esculentum L. Mill. cv. zhongshu No. 6） were treated by magnetized plasma before being sown to investigate its effect on the growth and yield of tomatoes. Biochemical analysis showed that dehydrogenase activity increased with the increase of the current but decreased when the current was higher than 1.5 A. The activities of peroxidase （POD） isoenzyme changed in the same pattern. There was no difference in germination percentage between treatments and control, which were carried out in laboratory conditions. However, significant （c~ = 0.01） difference was observed in germination percentage in the pot experiment. In the pot experiment, the sprouting rate for the treatment with a 1.5 A current was 32.75%, whereas the untreated was only 4.75% on the eleventh day. Germination time is more than one day earlier than the control. The 1.5 A treatment increased the tomato yield by 20.7%.
基金Supported by the National Natural Science Foundation of Cliina under grant 59402009.
文摘The diffuse reflectance Fourier trmisfonn infrared spectra of the boron nitride(BN)films deposited on steels by remote microwave plasma chemical vapour deposition(CVD)from borazine with nitrogen,hydrogen and argon were investigated in the wavenumber range of 400-4000 cm^(-1).It was found that the cubic BN for million depends on production of the intermediate species of cyclo triborazane((BH2NH2)3)and its dehydrogenntion.The structuml bonds of cydotriborazane are similar to that of cubic BN.OptiinUiu conditions for deposited BN films were found to be the bora,zine-nitrogen mixture at the substrate tempera.ture of 550℃.The BN films were n mixture of crystalline cubic BN accounting for the major content and hexagonal BN with relatively low hydrogen content.
基金Project supported by the Foundation of the 863-advanced Technology of China
文摘The investigation into the electronic stopping power of heavy ions in solids is very important for the modification processes of material surfaces using ion beams. For lowand high-velocity ions, the electronic stopping power can be calculated in the light of some theories, but for intermediate-velocity ions, so far there has not been any theory available except the empirical formula put forward by Ziegler, Biersack and Littmark (ZBL). This is because in this velocity range the ions are partially stripped and
