通过在 Fe-Si-B-P 合金体系中微合金化添加Mo 元素,并提高铁含量,成功制备了具有较强非晶形成能力和优异软磁性能的非晶软磁合金.研究发现, Mo 元素微合金化能有效提高合金的非晶形成能力,1％的 Mo 可以将该非晶合金体系的 Fe 含量极限...通过在 Fe-Si-B-P 合金体系中微合金化添加Mo 元素,并提高铁含量,成功制备了具有较强非晶形成能力和优异软磁性能的非晶软磁合金.研究发现, Mo 元素微合金化能有效提高合金的非晶形成能力,1％的 Mo 可以将该非晶合金体系的 Fe 含量极限提高到84％以上,从而得到了饱和磁感应强度（Bs ）高达1．63 T的非晶合金.其中 Fe80 Si4．75 B 9．5 P4．75Mo1非晶合金可以铸造形成非晶块体样品,临界直径达到1mm,饱和磁感应强度达到1．54 T,矫顽力为1．9 A/m.在整个成分范围内,该合金体系都具有1．9～5．1 A/m 的低矫顽力和高于传统 Fe-Si-B 合金的饱和磁感应强度（Bs ）,具有较好的应用前景.展开更多
[Objective]The aim of this study was to investigate whether communication signal C6-HSL among individual bacteria can influence plant growth and disease resistance ability. [Method]With potato virus-free plantlets as ...[Objective]The aim of this study was to investigate whether communication signal C6-HSL among individual bacteria can influence plant growth and disease resistance ability. [Method]With potato virus-free plantlets as the test materials and C6-HSL as the inducer,the potato＇s growth and the ability of resistance against Erwinia carotovora subp carotovora were tested after being treated by C6-HSL with different concentrations. The effects of C6-HSL on plant landmark defense enzyme activities and H2O2 content in potato leaves were measured especially. [Result]C6-HSL with different concentrations could obviously inhibit the growth rate of root and the number of roots,but had no effect on plant height,number of nodes and leaf size. POD or SOD activity and H2O2 content in plant landmark defense enzymes significantly increased after induction of C6-HSL,but PAL and PPO activity had no obvious change. In the resistant test,potato plants induced by C6-HSL could inhibit the infection of Erwinia carotovora subp carotovora effectively,and its incidence was significantly lower than the control group. [Conclusion]Bacteria AHL can be possibly used as a new kind of plant disease-resistant activator.展开更多
基金Supported by Natural Science Foundation in Hebei Province(C200600707)~~
文摘[Objective]The aim of this study was to investigate whether communication signal C6-HSL among individual bacteria can influence plant growth and disease resistance ability. [Method]With potato virus-free plantlets as the test materials and C6-HSL as the inducer,the potato＇s growth and the ability of resistance against Erwinia carotovora subp carotovora were tested after being treated by C6-HSL with different concentrations. The effects of C6-HSL on plant landmark defense enzyme activities and H2O2 content in potato leaves were measured especially. [Result]C6-HSL with different concentrations could obviously inhibit the growth rate of root and the number of roots,but had no effect on plant height,number of nodes and leaf size. POD or SOD activity and H2O2 content in plant landmark defense enzymes significantly increased after induction of C6-HSL,but PAL and PPO activity had no obvious change. In the resistant test,potato plants induced by C6-HSL could inhibit the infection of Erwinia carotovora subp carotovora effectively,and its incidence was significantly lower than the control group. [Conclusion]Bacteria AHL can be possibly used as a new kind of plant disease-resistant activator.
