nbd meaning in English
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神经白塞病
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Examples
- Methods : the clinical data of 2 patients with nbd was analyzed
方法：对神经白塞病2例进行回顾性分析。 - Objective : to investigate the diagnosis , treatment methods and misdiagnostic reasons of neuro - behcet ' s disease ( nbd )
摘要目的：探讨神经白塞病( nbd )的诊治方法及误诊的原因。 - Conclusions for a patient who had central nervous system involvement , nbd should be considered as well as other neurological disorders , lacks of detailed history , physical examination and recognition of nbd are the main causes of misdiagnosis
结论：对于中枢神经系统损害的患者，如果难以用常见神经系统疾病来解释，尤其是男性患者，应注意到本病的可能，病史询问不详细、体格检查不充分、缺乏对该病的认识是造成误诊的主要原因。 - Abstract : polyphenylacetylenes were synthesized by rn ( nbd ) cl 2 and wcl6 / ph4sn catalyst systems in n2 at room temperature . polymers with high yield and high molecular weight were obtained . their structures were characterized by uv , ir , nmr and gpc , respectively . the fluorescence of the polymer solution with different concentration was investigated using variable excitation wavelength from uv to visible region . the relation between fluorescence and polymer structure was studied . the results showed that the molecular chain structure has great influence on fluorescence of the polymers . the emitting peak wavelength of fluorescence for the polymer of high stereoregularity is independent of solution concentration and excitation wavelength . the emitting peak wavelength of fluorescence for the polymer with disordered molecular chain arrangement varies with changing the solution concentration and excitation wavelength , and different emission sites in molecular chains and low emitting yield are shown . the measurement and analysis of fluorescence spectroscopy of polyphenylacetylenes may provide some useful information to judge the molecular chain arrangement in some conjugated polymers
文摘:使用有机金属铑、金属钨/四苯基锡催化剂体系聚合苯乙炔，分别获得了高产率和高分子量的聚苯乙炔.使用uv ， ir ， nmr ， gpc等分别对聚合物结构进行了表征.采用不同波长的激发光对聚合物荧光性能进行研究，详细分析了聚合物结构与荧光性能之间的关系.研究结果发现，不同聚合物结构对聚合物荧光性能产生很大影响，规整性高的聚合物，将有较高的发光量子效率；聚合物规整性差，将可能导致多个荧光发光结构点，其荧光强度降低.聚合物荧光光谱研究将对某些共轭聚合物结构的规整性分析提供一些有用的信息