分布式光纤温度监测与报警系统的研究

分布式光纤温度传感器系统实质上是分布光纤喇曼光子传感系统（DOFTSS），它是近年来发展起来的一种用于实时测量空间温度场的光纤传感系统，具有自标定，自校准和自检测功能。对光纤测温系统的基本结构和基本原理进行了说明，介绍了分布光纤喇曼光子传感系统基准值，定标和直线拟合算法的实现，通过RS332和光纤测温系统串行通讯实现了系统状态的设置和显示，并组成了火灾预测和报警系统，对硬件结构的实现和软件流程进行了说明。     

一种新的微生物胞外多糖

本文报道了产粘短杆菌(Brevibacterium viscogenes.n.sp.)74-230利用原油或重液体石蜡作碳源产生一种胞外多糖,有可能在石油工业中应用.纯化的多糖在凝胶电泳和超离心分析中的行为是均一的.该多糖与已报道的其它多糖不同,由D-葡萄糖、D-甘露糖、D-半乳糖、L-鼠李糖和D-阿拉伯糖所组成,克分子比为4:3:2:1:1/4,并含有丙酮酸0.5—0.7%.其沉降系数、特性粘度、偏比容、分子量和旋光度分别为10S,6.3 dl/g,0.775ml/g,3,488,000和[α]_D~(20)+19.8.它的红外光谱与其它多糖的相似。     

A NEW MICROBIAL EXOPOLYSACCHARIDE

A strain of Brevibacterium viscogenes n. sp. 74-230 utilizing crude oil or heavy liquid paraffin as carbon source produces an exopolysaecharide, which is applicable in petroleum industry. Behaviour of the purified polysaecharide in polyacrylamide gel electrophoresis and in ultracentrifugal analysis seems to be homogeneous. This polysaccharide differs in composition from the reported polysaceharides and is composed of D-glucose, D-mannose, D-galactose, L-rhamnose and D-arabinose with molar ratio of 4:3:2:1:1/4. It contains 0.5—0.7% pyruvic acid. Its sedimentation coefficient is 10S, intrinsic viscosity 6.3 dl/g, partial specific volume 0.775 ml/g, molecular weight 3,488,000 and [α]_D~(20) 19.8. Its IR spectrum is similar to that of other polysaecharides.