Therapeutical effect of Shengmaisan is determined by the interaction among the three herbs

Shengmaisan is a recipe of traditional Chinese medicine, which is composed of three herbs. The interaction among the components from the three herbs of Shengmaisan is investigated using FT-IR, Matrix Assistant Laser Desorption/Ionization Time of flight mass spectrometry (MALDI TOF MS) and TEM observation. Interactions among various components from different herbs cause enhancement of the solubility of some component and suppression of the solubility of others. Results from MALDI-TOF MS show that some components found in the decoction from a single herb disappear when different herbs are decocted together. On the other hand, new substances are produced when two and/or three herbs of Shengmaisan are decocted together. TEM showed that vacuoles formed in the decoction from two and/or three herbs of Shengmaisan but did not occur in any decoction from a single herb. This result provides us direct evidence that the solubilized structure is formed by the interaction among the components from different herbs. This knowledge helps us to understand the therapeutical effects of traditional Chinese medicine.     

A dynamic fuzzy clustering method based on genetic algorithm

A dynamic fuzzy clustering method is presented based on the genetic algorithm. By calculating the fuzzy dissimilarity between samples the essential associations among samples are modeled factually. The fuzzy dissimilarity between two samples is mapped into their Euclidean distance, that is, the high dimensional samples are mapped into the two-dimensional plane. The mapping is optimized globally by the genetic algorithm, which adjusts the coordinates of each sample, and thus the Euclidean distance, to approximate to the fuzzy dissimilarity between samples gradually. A key advantage of the proposed method is that the clustering is independent of the space distribution of input samples, which improves the flexibility and visualization. This method possesses characteristics of a faster convergence rate and more exact clustering than some typical clustering algorithms. Simulated experiments show the feasibility and availability of the proposed method.     

Isotopic evolution of the terminal Neoproterozoic and early Cambrian carbon cycle on the northern Yangtze Platform, South China

Profound geotectonic, climatic and biological changes occur during the terminal Neoproterozoic and its transition into the early Cambrian. These are reflected in temporal variations of the chemical and isotopic composition of seawater. We are studying a sequence of sedimentary rocks at the Shatan section, northern Yangtze Platform, Sichuan Province of China. This succession comprises, in ascending stratigraphic order, predominantly calcareous sediments of the Sinian upper Dengying Formation and black shales of the lower Cambrian Guojiaba Formation (time equivalent of Niutitang Fm.). Paleoenvironmental setting represents shallow-water shelf deposits. The objective of our study is to provide temporal records for the isotopic compositions of organic and carbonate carbon throughout this time interval. Organic carbon isotope values display a range between -35.8‰ and -30.1‰ with clear stratigraphic variations. Carbonate carbon isotope data vary between -3.5‰ and +0.5‰. These secular variations are interpreted to reflect perturbations of the global carbon cycle, specifically changes in the fractional burial of organic carbon. However, local conditions have further affected the isotopic signals.     

对培育建筑企业技术创新能力的思考

知识经济时代 ,知识资源已成为企业竞争的核心 ,培育建筑企业技术创新能力 ,丰富建筑企业知识资源 ,是实施建筑企业科技兴业、质量兴业和输出兴业战略的迫切需要 ,通过建筑企业的观念创新、系统规划、管理创新、机制创新、文化创新、优化人才资源、强化教育培训、积极引进先进技术、加大投资力度、全员互动来培育和提高其技术创新能力 ,以促进建筑企业技术进步 ,增强建筑企业的国际竞争能力     

Kinetics of Growth and Nutrient Consumption in the Culture of Trichosanthes kirilowii Hairy Root

IntroductionThe hairy roots produced by Agrobacteriumrhizogenes infection are characterized by highgrowth rate and genetic stability. Thesegenetically transformed roots can produce similarhigher levels of secondary metabolites than intactplants[1] ,so hairy root cultures are a promisingmethod for producing valuable secondarymetabolites of many plants.Recently,two kindsof ribosome- inactivating proteins ( RIPs) [2 ] ,trichosanthin ( TCN ) [3 ] ,and TAP 2 9[4] wereidentified in Trichosanthes…     

快速测定煤发热量的数学模型及其应用

用回归分析的方法，对影响煤发热量的诸因素进行了探讨，建立起回归法的数学模型，继而提出了用回归法测定煤发热量的新方法。     

无线通信系统模块化设计标准体系的研究

根据通信装备模块化的需求，按照全新无线通信系统设计理念，提出了无线通信系统模块化设计标准体系，论述了该标准体系建立的必要性，分别定义了标准体系中各项标准的名称、目的以及要求，分析了各标准之间的相互关系，明确了标准应该涉及的内容。在对无线通信系统模块化设计标准体系研究的基础上，形成了硬件体系结构标准、软件体系结构标准和安全体系结构标准，通过对软件体系结构标准进一步细化，形成了软件平台接口标准和应用程序接口标准。     

简析《说文解字》中部分饮食文字的背景

本文选择了《说文解字》中与饮食有关的一部分字，把它们分为粮食、蔬菜、肉食、酒水4大类。根据字形与字义的关系，分析了当时社会的饮食文化背景，揭示了社会发展与文字发展的关系。     

蟠龙探区长2砂岩储层物性的控制因素

查明低孔、低渗砂岩储层非均质性的原因,对该类油藏的研究、勘探和开发具有重要的理论和实际意义。对蟠龙探区上三叠统长2砂岩进行了沉积相、砂岩岩石学和成岩作用及储层物性演化影响等研究,结果表明:其物性受沉积相、裂缝发育程度与规模、砂岩碎屑成分及成岩作用的控制,辫状河河心砂坝中细-细砂岩具有较高的孔隙度(平均13.5％)和渗透率(平均16.656×10-3μm2),曲流河天然堤粉细砂岩和细砂岩的孔隙度(平均11.2％)和渗透率(平均7.085×10-3μm2)较低;埋藏压实作用是导致砂岩孔隙丧失的主要原因,使平均孔隙度丧失23.3％,胶结作用使平均孔隙度丧失6.4 ％,碳酸盐是砂岩孔隙度丧失的主要胶结物;次生溶解作用是物性得到改善的重要途径;裂缝(平均1.8％)对砂岩渗透率的提高起了重要贡献。认为裂缝是导致砂岩储层非均质性较强和影响油田注水开发效果的主要因素之一。     

对混炼型聚氨酯弹性体生胶可塑度影响因素的探讨

详细论述了混炼型聚氨酯弹性体(MPU)的加工过程和特性，通过实验指出了生胶可塑度与MPU的加工过程和质量有密切的关系，影响可塑度的因素有生胶中硬链段的含量、聚酯二醇的结构和生胶的分子量。