荧光光谱法对中药注射液热稳定性的研究

首次采用荧光光谱法对中药注射液热稳定性进行初步探讨.发现在恒温(40℃、80℃)条件下、不同中药注射液随时间变化的荧光强度和荧光光谱图,呈现出规律性的变化.通过对其谱图和荧光强度的分析,能够反映出恒温(40℃、80℃)条件下,随时间变化的荧光光谱的差异,不同温度对谱峰强度的差异性影响及不同注射剂热稳定性变化曲线的差异.找出了不同温度下不同中药注射液荧光强度减弱10%的时间.     

Kondensationsprodukte von Oxyketonen und Aminoketonen mit 2,4,5-Triamino-6-oxy-pyrimidin

Summary By condensing 2:4:5-triamino-6-hydroxy-pyrimidine with dihydroxyacetone (diacetate), diaminoacetone or acetone-1,3-di (p-formylaminobenzoic acid) not the expected 8- or 9-oxymethyl resp. -aminomethyl-pteridines but 8-or 9-methyl-pteridines were obtained. With p-tolyl-d-isoglucosamine not a tetrahydroxybutyl-pteridine but a trihydroxybutyl-pteridine was formed. For an explanation of these results it is supposed that from the dihydro-pteridines formed at first by intramolecular splitting off of H₂O or R·NH₂ aromatization takes place.     

Influence of Microstructure and Sintering Routes on Transport Properties of Apatite Materials for Fuel Cells

1 Results Oxy-apatite materials are thought as zirconia-substitutes in Solid Oxide Fuel Cells due to their fast ionic conduction. However, the well known difficulties related to their densification prevent them from being used as such. This study presents strategies to obtain oxy-apatite dense materials and the influence of elaboration route on transport properties. Particular emphasis is put on the microstructure effect on ion conduction. By the combined use of freeze-drying and conventional or spark p...     

New Membranes Based on Polybenzimidazole for Polymer Fuel Cells

1 Results Acid-doped polybenzimidazoles[1] are particularly appealing because of high proton conductivity with no or low humidification and promising fuel cells performances. PBI, in fact, contains basic functional groups which can easily interact with strong oxo-acids, such as H3PO4 and H2SO4. The acid partially protonates the polymer and partially is freely dispersed in the polymer backbone, so allowing proton migration via Grotthuss mechanism along the anionic chains[2]. Anyway, a technological limit...     

Fettsäuren aus dehydratisiertem Rizinusöl mit sog. Vitamin-F-Wirkung

Summary The fatty acids from dehydrated castor oil, mainly consisting of 9,11- and 9,12-linoleic acid, show in biological tests vitamin effects similar to those of the so-called essential fatty acids.     

高分辨率谱估计算法MUSIC和Minimum-Norm及性能比较

本文从理论上详细叙述了高分辨率谱估计技术MUSIC和Minimum-Norm算法的机理,给出并比较了它们的空域谱平坦度、3dB谱宽度和谱峰值随信噪比的变化情况.文章对工程设计人员加深理解、选择算法具有一定的参考意义.