分模块教学模式下的大学物理教学改革*

论述了我校采取分模块教学模式,体现以学为本的教学理念,以及在教学内容、教学方法及手段上所做的一系列的改革与尝试.     

碳纳米管低温氢等离子体的微波吸收特性研究

运用双流体理论,在同时考虑了碳纳米管中低温氢等离子体的电子碰撞吸收和氢离子碰撞吸收的基础上,理论导出了铁催化高压歧化生成的碳纳米管中低温氢等离子体的微波吸收系数公式,数值计算了不同条件下的微波吸收系数.模拟结果表明,铁催化高压歧化生成的碳纳米管中低温氢等离子体对2.45GHz的微波产生强烈吸收.理论结果与实验数据相吻合.     

一类新的不对称变色酸双偶氮氟膦型试剂与铋显色反应的研究

对5种新的偶氮氟膦型试剂与铋(Ⅲ)的显色反应的条件进行了研究,考察了反应酸度、配合物的最大吸收峰的位置、配合物的稳定性、反应灵敏度及选择性等,结果表明:5种偶氮氟膦型试剂与铋配合物的最大吸收波长位于622～664nm之间,摩尔吸光系数在(0.72～0.98)×105L·mol-1·cm-1范围内。方法已用于实际样品胃必治中铋的测定。     

The effects of a static magnetic field on the microwave absorption of hydrogen plasma in carbon nanotubes： a numerical study

We theoretically investigate the microwave absorption properties of hydrogen plasma in iron-catalyzed high-pressure disproportionation-grown carbon nanotubes under an external static magnetic field in the frequency range 0.3 GHz to 30 GHz, using the Maxwell equations in conjunction with a general expression for the effective complex permittivity of magnetized plasma known as the Appleton-Hartree formula. The effects of the external static magnetic field intensity and the incident microwave propagation direction on the microwave absorption of hydrogen plasma in CNTs are studied in detail. The numerical results indicate that the microwave absorption properties of hydrogen plasma in iron-catalyzed high-pressure disproportionation-grown carbon nanotubes can be obviously improved when the exter- nal static magnetic field is applied to the material. It is found that the specified frequency microwave can be strongly absorbed by the hydrogen plasma in iron-catalyzed high-pressure disproportionation-grown carbon nanotubes over a wide range of incidence angles by adjusting the external magnetic field intensity and the parameters of the hydrogen plasma.     

微乳液介质中meso-四(3-羟基苯基)卟啉与铅显色反应的研究

研究了在TritonX 10 0 /正丁醇 /正庚烷 /水组成的非离子型微乳液中Pb(Ⅱ )与meso 四(3 羟基苯基 )卟啉 [T(3 HP)P]的显色反应。结果表明 ,微乳液较TritonX 10 0胶束体系有更好的增溶增敏作用。在混合掩蔽剂氟化钠 柠檬酸 乙二胺及pH 10 .0的硼砂 氢氧化钠缓冲液中 ,经沸水浴加热 3min ,Pb(Ⅱ ) T (3 HP)P在微乳液和少量过氧化氢中形成配合物 ,ε4 6 6 =1.5 0×10 5L·mol- 1·cm- 1,Pb(Ⅱ )在 0～ 11μg/2 5ml内遵守比耳定律 ,对样品中微量铅的测定结果满意。     

不对称变色酸双偶氮氟胂型新显色剂的合成及其与钍的显色反应研究

合成了8种不对称变色酸双偶氮氟胂型新显色剂，并研究了它们与钍的显色反应，建立了最佳反应体系。试验发现由于引入了吸电子性极强的氟取代基，反应体系的酸度、选择性及灵敏度大为提高，是一组很好的测钍显色剂。     

微乳液中铅与新显色剂meso-四(2,5-二氟苯基)卟啉的显色反应的研究

研究了不同配比的微乳液体系对Pb(Ⅱ)与新显色剂meso 四(2,5 二氟苯基)卟啉(T(2,5 DFP)P)的显色反应的增敏效应,发现在邻菲罗啉、pH9.6的硼砂 氢氧化钠缓冲液与氟化钠的掩蔽体系中,微乳液的配比为Tween 80∶正丁醇∶正庚烷∶水=10∶8∶2∶980时,存在灵敏的显色反应,ε465=2.70×105L·mol-1·cm-1,较对应的胶束体系增敏60%。     

The effects of static magnetic field on microwave absorption of hydrogen plasma in carbon nanotubes: A numerical study

We theoretically investigate the microwave absorption properties of hydrogen plasma in iron-catalyzed highpressure disproportionation-grown carbon nanotubes under an external static magnetic field in the frequency range 0.3 GHz to 30 GHz, using the Maxwell equations in conjunction with a general expression for the effective complex permittivity of magnetized plasma known as the Appleton–Hartree formula. The effects of the external static magnetic field intensity and the incident microwave propagation direction on the microwave absorption of hydrogen plasma in CNTs are studied in detail. The numerical results indicate that the microwave absorption properties of hydrogen plasma in iron-catalyzed high-pressure disproportionation-grown carbon nanotubes can be obviously improved when the external static magnetic field is applied to the material. It is found that the specified frequency microwave can be strongly absorbed by the hydrogen plasma in iron-catalyzed high-pressure disproportionation-grown carbon nanotubes over a wide range of incidence angles by adjusting the external magnetic field intensity and the parameters of the hydrogen plasma.     

The rehybridization of electronic orbitals in carbon nanotubes

Rehybridization of electronic orbitals in carbon nanotubes contains tilting angles of π orbital, electrons wavefunctions of π orbital and a orbital, degrees of hybridization, etc. In this paper, we have obtained analytical formulas of tilting angle of π orbital relative to tube surface, electrons wavefunctions of π orbital and a orbital, degrees of hybridization, separately, as well as the numerical results.