荧光显示管直丝氧化物阴极有效逸出功的计算

阴极的逸出功是表征阴极发射能力的物理量，求定荧光显示管直丝氧化物阴极有效逸出功时，因其零场发射电流密度难于准确取值，温度无法直接测量，显得困难，须予解决，为此提出了一种计算阴极有产逸出功的办法，对某显示管的发射欠佳和“低温高效”的两种氧化物阴极的有效逸出功进行计算，有效逸出功率是靠测量相关物理量再同计算得出，精度不很高，文中所用办法也不例外，但所得结果能反映阴极发射能力，所需仪器少，是实用方法。     

高碳铬轴承钢中有害元素的X射线荧光分析

介绍应用ｐｗ２６００多道Ｘ射线荧光分析仪测定高碳铬轴承钢中Ａｓ、Ｓｎ、Ｔｉ、Ｐｂ、Ｓｂ有害元素的快速定量分析。对工作电压、工作电流及测定时间进行了不同的条件试验。对影响测定准确性的背景，谱线重叠和基件的吸收增强效应ＤＪ模式进行了校正，并比较了ＸＲＦ结果与化学保证值，其偏差符合分析公差要求。该方法将用于高碳铬轴承钢炉前生产过程的质量控制。     

刀具行业硬质合金刀具占比逐步增大

日本刀具协会的统计数据显示，未来在刀具行业，硬质合金刀具所占比率将逐步增大，而高速钢刀具产品的比率将逐步减少。     

Formation of composites fabricated by exothermic dispersion reaction in A1-TiO2-B2O3 system

The formation of aluminum matrix composites fabricated by exothermic dispersion reaction in A1-TiO2-B2O3 system was investigated. The thermal analysis results show that the reactions are spontaneous and exothermic. The Gibbs free energy of α-Al2O3 is the lowest among all the combustion products, followed by TiB2 and Al3Ti. It is noted that when the B2O3/TiO2 mole ratio is below 1, the reaction products are composed of particle-like α-Al2O3, TiB2 and rod-like Al3Ti. The α-Al2O3 crystallites, resulting from the reaction between A1 and TiO2 or B2O3, are segregated at the grain boundaries due to a lower wettability with the matrix. SEM micrographs show that rod-like Al3Ti phase distributes uniformly in the matrix. When the BEO3/TiO2 mole ratio is around 1, the Al3Ti phase almost disappears in the composites, and the distribution of α-Al2O3 particulates is improved evidently.     

靶向抗癌药格列卫与其治疗白血病疗效监测

Gleevec是抑制致癌的融合蛋白BCR-ABL的一种分子靶向治疗药物,BCR-ABL是一种与慢性髓细胞性白血病(CML)有关的酪氨酸激酶抑制剂。用Gleevec选择性地抑制BCR-ABL活性在治疗CML中显示出很好的效果,特别是在CML慢性期,因此,监测疗效非常重要。现就Gleevec的研究进展及如何监测其在CML中的疗效作一简单综述。     

Experimental Research on Erbium-doped Superfluorescent Fiber Source

The effects of the variations in fiber length, fiber mirror reflectance on efficiency and output power are experimentally investigated for erbium-doped double pass backward superfluorescent fiber sources (SFSs). The influence of fiber length on mean wavelength stability (MWS) has also been demonstrated. By incorporating a short section of un-pumped erbium-doped fiber (EDF) at the output port, the pump power dependent on MWS becomes independent of pumped EDF length. This is a novel phenomenon that hasn‘t been reported up to now,and should be helpful to SFS fabrication and theory analysis. By using a fiber Michelson interferometer as spectrum slicing component,a multi-wavelength fiber source (MWFS) with ～20 channels (from 1542nm to 1559nm) is got. The MWFS has a channel spacing of ～0. 8 nm which satisfies ITUstandard. The intensity fluctuation among channels is less than 0.5dB,and the extinction ratio of all channels is above 14dB. This kind of MWFS should be useful to wavelength division multiplexing systems.     

一种发出红色荧光的六核配合物[Cu6（pymt）6]

合成了一价铜和2-巯基嘧啶盐的配合物[Cu6（pymt）6]并进行结构分析，该配合物能发出强的红色荧光。其中，一价铜离子的配位环境为变形平面三角形，陪体pymt采用μ3-S2N桥联方式参与配位。     

3080E3型X射线荧光光谱仪电路故障的诊断及处理

文章通过对3080 E3型X射线荧光光谱仪电子电路故障的诊断及处理,介绍了一般电子电路故障的诊断及处理方法。