Comparison of heating mechanisms of argon helicon plasma in different wave modes with and without blue core

In this work,we investigated the discharge characteristics and heating mechanisms of argon helicon plasma in different wave coupled modes with and without blue core.Spatially resolved spectroscopy and emission intensity of argon atom and ion lines were measured via local optical emission spectroscopy,and electron density was measured experimentally by an RFcompensated Langmuir probe.The relation between the emission intensity and the electron density was obtained and the wavenumbers of helicon a...     

Comparison of double layer in argon helicon plasma and magnetized DC discharge plasma

We present in this paper the comparison of an electric double layer (DL) in argon helicon plasma and magnetized direct current (DC) discharge plasma. DL in high-density argon helicon plasma of 13.56 MHz RF discharge was investigated experimentally by a floating electrostatic probe and local optical emission spectroscopy (LOES). The DL characteristics at different operating parameters, including RF power (300–1500 W), tube diameter (8–60 mm), and external magnetic field (0–300 G), were measured. For comparison, DL in magnetized plasma channel of a DC discharge under different conditions was also measured experimentally. The results show that in both cases, DL appears in a divergent magnetic field where the magnetic field gradient is the largest and when the plasma density is sufficiently high. DL strength (or potential drop of DL) increases with the magnetic field in two different structures. It is suggested that the electric DL should be a common phenomenon in dense plasma under a gradient external magnetic field. DL in magnetized plasmas can be controlled properly by magnetic field structure and discharge mode (hence the plasma density).     

改性秸秆在染料废水处理中的应用研究进展

秸秆及其纤维素结构中含有许多活性羟基,可通过羟基的衍生化反应,将其制备成改性秸秆吸附剂,用于染料废水处理中.从改性秸秆的吸附机理引入,介绍了秸秆及其纤维素的醚化改性、酯化改性以及接枝共聚改性等相关改性方法,同时提出了改性秸秆吸附剂的常见类型及再生方法,总结了该类吸附剂未来的发展趋势和研究方向.     

Observation of low-frequency oscillation in argon helicon discharge

We present here a kind of low-frequency oscillation in argon helicon discharge with a half helical antenna. This time-dependent instability shows a global quasi-periodic oscillation of plasma density and electron temperature, with a typical frequency of a few tens of Hz which increases with external magnetic field as well as radiofrequency(RF) power. The relative oscillation amplitude decreases with magnetic field and RF power, but the rising time and pulse width do not change significantly unde...     

针刺对应点治疗急性软组织损伤200例临床观察

针刺对应点是根椐古人缪刺法发展而来,本文对针刺对应点的取穴原则,取穴方法进行了介绍,通过对200例急性软组织损伤的治疗,二次治愈率达72.5%.初步证明了该法具有取穴简单,易学易用,疗效可靠的优点.     

碘伏消毒剂的研制和应用

1 前言 碘伏(Iodophor)是一种以表面活性剂作为助溶剂和载体的不定形络合物,碘以络合形式位于胶粒的中心而被运载,在水中逐渐解聚溶解。由于碘在表面活性剂中缓慢释放,因此杀菌作用持久,刺激性低,着色作用消失,克服了碘酒精溶液易升华,黄染、有刺激的缺点,同时保留其杀菌作用。国外于六十年代开始应用,八十年代已在欧美各大医