干旱胁迫对不同玉米品种叶片膜透性的影响

对不同玉米品种进行干旱处理,对叶片含水量、土壤含水量、叶片质膜透性进行测定．结果表明,土壤干旱胁迫条件下,玉米叶片含水量下降,叶片质膜透性上升;随着胁迫时间的延长,即土壤含水量的降低,叶片质膜透性不断的增加,其中新实1号的变化幅度最小,而叶片含水量则随之不断的减少,与叶片质膜透性的结果相符．这说明幼苗期新实1号的抗旱能力较强．因此,对叶片含水量、土壤含水量、叶片质膜透性的测定可以作为幼苗期抗旱鉴定的重要指标．     

锂电池电解质电导率理论计算

非晶态电解质的电导率通常是由试验所测得,方法很多,但要受试验条件限制,因此所得结果和实际数值要有些差别,从理论上进行计算得到的结果要更接近其真实值.本文引用能斯特-爱因斯坦(Nernst-Einstein)方程,计算了非晶态电解质Li6Si2O2S5(Li2S-SiS2-Li4SiO4)的理论电导率为10-3S/cm.     

使用Q值提升技术的增益可调GSM低噪声放大器的设计

现代CMOS工艺的发展使得在CMOS工艺上设计射频IC前端成为可能。但在传统CMOS工艺集成的片上螺旋电感品质因数(Q)偏低,大大影响其性能。通过引入负电导实现螺旋电感Q值提升,并将其应用于共栅低噪声放大器的设计。     

Demonstration of a new biosensing concept for immunodiagnostic applications based on change in surface conductance of antibodies after biomolecular interactions

We report an important observation that the surface conductivity of antibody layer immobilized on polylysine-coated glass substrate decreases upon the formation of complex with their specific antigens. This change in conductivity has been observed for both monoclonal and polyclonal antibodies. The conductance of monoclonal mouse IgG immobilized on polylysine-coated glass substrate changed from 1.02×10⁻⁸ Ω⁻¹ to 1.41×10⁻¹¹ Ω⁻¹ at 10 V when complex is formed due to the specific biomolecular interactions with rabbit anti-mouse IgG F(ab′)₂. Similar behavior was observed when the same set up was tested in two clinical assays: (1) anti-Leishmania antigen polyclonal antibodies taken from Kala Azar positive patient serum interacting with Leishmania promastigote antigen, and (2) anti-p21 polyclonal antibodies interacting with p21 antigen. The proposed concept can represent a new immunodiagnostic technique and may have wide ranging applications in biosensors and nanobiotechnology too.     

Science Letters:Demonstration of a new biosensing concept for immunodiagnostic applications based on change in surface conductance of antibodies after biomolecular interactions

Electrical conductivity in biomolecules and other large polymeric systems has become an important topic of current research. Schlag et al.(2000a; 2000b) demonstrated that charge migration in proteins is highly efficient although the mechanistic origin is still debated and largely unknown even though various models have been proposed by Weinkauf et al.(1995; 1996; 1997). According to them, the charge transfer between amino acids takes place by hole hopping between local sites of lowest ionizati…     

锂电池电解质电导率理论计算

非晶态电解质的电导率通常是由试验所测得,方法很多,但要受试验条件限制,因此所得结果和实际数值要有些差别,从理论上进行计算得到的结果要更接近其真实值.本文引用能斯特-爱因斯坦(Nernst-Einstein)方程,计算了非晶态电解质Li6Si2O2S5(Li2S-SiS2-Li4SiO4)的理论电导率为10-3S/cm.