Quantitative similarity assessment of non-linear chemical fingerprint of traditional Chinese medicine by similarity system theory

The similarities of the non-linear chemical (NLC) fingerprints of Radix Glycyrrhizaes from four producing areas and eight other traditional Chinese medicines (TCMs) were calculated, using a systemic similarity calculation method proposed and three other main calculation ones (Euclidean distance, correlation coefficient and included angle cosine). All of the correlation coefficient similarities of different TCMs are higher than 0.952, and the included angle cosines are all higher than 0.962. So, both the correlation coefficient and included angle cosine similarities are unable to be used as the criteria for quantitatively evaluating the similarities of NLC fingerprints of TCMs. Although all of the Euclidean distance similarities of Berry Liquorices from four producing areas are less than 73, those of the other eight TCMs are all more than 180. The Euclidean distance cannot reflect the relative magnitudes of the feature differences in the NLC fingerprints very correctly. The systemic similarity method is the best among the four ones. All of the systemic similarities of Berry Liquorices from the four producing areas are higher than 0.962, while those of the other eight TCMs are all lower than 0.805, and the systemic similarity can reflect the differences between samples most faithfully, and can be used as a quantitative one evaluating the similarities of NLC fingerprints of TCMs, by which TCM could be distinguished and evaluated quickly, simply and exactly.     

非线性化学指纹图谱鉴别和区分牛奶及其制品

非线性化学指纹图谱技术是基于化学振荡反应,从非线性化学角度来对试样进行分析的一种新的技术。牛奶及其制品是一种营养价值比较全面的食品,今天已成为人们日常生活不可缺少的一部分。本文考察利用非线性化学指纹图谱来对15种牛奶及其制品进行快速、准确的鉴别和区分的可行性。实验结果表明:牛奶及其制品的非线性指纹图谱具有较强的直观特征性,能很好的鉴别和区分,利用聚类分析(CA)和主成分分析(PCA)的方法得到15个样品的非线性化学指纹图谱的特征数据能够很好的反映它们的指纹图谱的特征。     

基于单片机的马弗炉温度控制系统

介绍了单片机控制的马弗炉温度控制系统,重点讲述了温度控制电路。实现了保温和升温的时间按照要求进行控制,该系统可以按工艺的需要工作在快灰,慢灰,挥发分和通用模式下,很好的满足了热处理工艺的要求。仿真和实验数据表明该系统能稳定、快速和准确地控制炉膛内的温度。     

CH375在一种岩心自然电位测井系统中的应用

主要介绍了一种基于CH375实现TMS320LF2407A型DSP与PC机USB接口通信方案.该方案以油井高精度自然电位自动测量仪为应用背景,给出了CH375与DSP接口电路框图,并详细介绍了实现USB数据传输的上、下位机的程序设计.实验结果分析表明了此方案的有效性.     

利用非线性化学指纹图谱技术鉴别评价茶饮料

通过向稳态体系“溴酸钠-硫酸锰-硫酸-丙酮”中加入不同的茶饮料,获得来自不同产家、不同品种的茶饮料的非线性化学指纹图谱,并对其进行相似度计算。非线性化学指纹图谱的直观信息、定量信息、相似度计算结果都能很好的将冰红茶从其他茶饮料中鉴别出来,且振荡寿命与检测用量有很好的函数关系。通过比较不同掺水量的茶饮料的非线性化学指纹图谱的参数信息,对茶饮料的质量进行评价。非线性化学指纹图谱技术可为茶饮料的鉴别和评价提供一种新的方法。     

非线性化学指纹图谱在中药研究中的应用

以Mn2+-H+-BrO3--CH3COCH3和作为耗散物的中药还原活性成分作为测定指纹图谱的基本非线性化学体系,测定了9批中药的非线性化学指纹图谱。结果表明,中药的非线性化学指纹图谱直观特征结合系统相似度可直接用于中药真伪鉴别,利用麻黄指纹图谱诱导时间与成分总含量的关系,初步确定了不同产地麻黄活性成分的相对总含量。