An Integrated Theory of Adsorption and Partition Mechanism and Eash Contribution to Solute Retention in Reversed Phase Liquid Chromatography

With the combination of the the stoichiometric displacement model for retention (SDM-R) in reversed phase liquid chromatography (RPLC) and the stoichiometric displacement model for adsorption (SDM-A) in physical chemistry,the total number of moles of the re-solvated methanol of stationary phase side.nr,and that of solute side in the mobile phase,q,corresponding the one mole of the desorbing solute,were separately determined and referred as the characterization parameters of the contributions of the adsorption mechanism and partition mechanism to the solute retention,respectively.A chromatographic system of insulin,using mobile phase consisting of the pseudo-homologue of alcohols(methanol,ethanol and 2-propanol)-water and trifluoroacetic acid was employed.The maximum number of the methanol layers on the stationary phase surface was found to be 10.6,only 3 of which being valid in usual RPLC,traditionally referred as a volume process in partition mechanism.However,it still follows the SDM-R.Both of q and nr of insulin were found not to be zero,indicating that the retention mechanism of insulin is a mixed mode of partition mechanism and adsorption mechanism.When methanol is used as the organic modifier,the ratio of q/nr was 1.13,indicating the contribution to insulin retention due to partition mechanism being a bit greater than that due to adsorption mechanism.A linear relationship between q,or nr and the carbon number of the pseudo-homologue in the mobile phase was also found.As a methodology for investigating the retention mechanism retention and behavior of biopolymers.a homologue of organic solvents as the organic modifier in mobile phase has also been explored.     

中药烧伤膏的研究现状及应用前景

探索中药烧伤膏的研究现状及进展。通过文献检索方式,探索中医对烧伤的认识和疗伤的方法及中药烧伤膏剂的治疗情况。中药膏剂在治疗烧伤方面有一定的优势,临床应用广泛,取得一定的疗效,无明显毒副作用,尤其是在I度和Ⅱ度烧伤方面应用广泛,值得进一步研究。中医对烧伤的治疗是以中医基本理论为基础,以辩证施治、理论方药为指导的治疗方法,提出中药烧伤膏治疗烧伤方面的问题,为中药治疗烧伤的研究提供参考。     

某医院门诊药房开展药物咨询的方法与体会

为提高门诊患者合理用药水平,探讨医院门诊药房用药咨询方法,通过采用咨询窗口交谈、电话咨询、留言本等形式开展药物咨询服务,增强了患者用药的依从性,改善了医患关系.     

Molecular Simulation Study of Alkyl monolayers on Si(Ⅲ） Surface

The structure of eight-carbon monolayers on the H-terminated Si(Ⅲ） surface was investigated by molecular simulation method.The best substitution percent 50% for octene or octyne-derived monolayer can be obtained using molecular mechanics calculation.And the densely packed,well-ordered monolayer on Si(Ⅲ） surfacec and be shown through energy minimization in the suitable-size simulation cell.     

Abnormal Fluorescence Behavior of Pyrene Functionalized Chitosan Films to Some Quenchers

Investigation of the fluorescence behavior of a pyrene functionalized chitosan film (PSC-CS) to some quenchers,including KI,CH3NO2 and Cu(NO3)2,has revealed that the monomer emission from the PSC-CS film increased rather than decreased,whereas the excimer emission decreased with the increase of time of duration after addition of KI or Cu(NO3)2.Both the increasing and decreasing processes could last as long as 20min to 40min,Unlike that observed in the system containing KI or Cu(NO3)2,for CH3NO2 system,both the monomer emission and the excimer emission increased with introduction of the quencher,but the excimer emission only started to increase after an hour-long induction period.The position of the excimer emission of the PSC-CS film did not change very much with addition of KI or Cu(NO3)2.However,addition of CH3NO2 made the excimer emission blue shifted for at least 20nm indicating formation of distorted excimers opr partially overlapped excimers.The fluorescence response of the film to external additions is sensitive but is low in selectivity.This property may make the film use as a novel sensing material for monitoring the purity of water.     

A Capillary Electrophoresis Detection Scheme for Water-soluble Vitamins Based on Luminol-BrO^- Chemilumlinescence System

A novel chemiluminescence detection scheme has been developed for detecting water-soluble vitamins following capillary electrophoresis(CE) separation.This detection was based on the inhibitory effect of vitamins on the CL reaction between luminol and BrO^- in basic aqueous solution.Detection of vitamins was accomplished with a borate-based background electrolyte at pH9.2.The luminol was used as a component of the separation carrier electrolytc.     

Spontaneous Vesicle Formation in Mixed Aqueous Solution of Poly-tailed Cationic and Anionic Surfactants

Spontaneous vesicles from the mixed queous solution of poly-talied cationic surfactant PTA and anionic surfactant AOT are firstly obtained.Vesicle formation and characterizations are demonstrated by negative-staining TEM and dynamic light scattering.A monodisperse vesicle system is obtained with a polydispersity of 0.082.Ultrasonication can promote the vesicle formation,Mechanism of vesicle formation is discussed from the viewpoint of molecular interaction.     

探讨水利工程施工技术措施

近几年来，我国的水利建设处于快速发展的时期，水利工程施工的技术、工艺、材料和装备等方面都取得了瞩目的成就，在施工关键技术上也取得了突破。本文对水利工程渗水形成的原因进行了分析，并提出了有效的防护措施及堵漏防水施工等施工方法。     

Comparison of the Contributions of Tetrahydrofurfuryl Alcohol and PEG to α-Chymotrypsin Renaturation with High Performance Hydrophobic Interaction Chromatography

The contributions of tetrahydrofurfuryl alcohol(THFA) and polyethylene glyco(PEG) to the renature efficiency of α-chymotrypsin were investigated and compared with each other,The maximum increments of bioactivity recovery of α-Chy were found to be 25.1% for THFA,10.4% for PEG,respectively.The experimental results indicated that the denaturant solution containing THFA contributed more to the renaturation of α-Chy in high performance hydrophobic interaction chromatography(HPHIC) than that containing PEG,when the concentration of THFA was 3.2%,the bioactivity recovery of α-Chy is the highest.     

蓬莱出土古代青铜器锈蚀产物的显微喇曼光谱分析

首次运用显微喇曼光谱(RM)技术,对山东省蓬莱市登州博物馆馆藏古代青铜器的锈蚀产物进行分析,发现锈蚀产物的成分比较复杂,主要有蓝铜矿、孔雀石、氯铜矿、副氯铜矿、白铅矿、黄铅矾及方解石。证实该馆多数青铜器上白绿色粉状锈蚀产物为氯铜矿及副氯铜矿的混合物,是引发“青铜病”的重要隐患,所以,对这批青铜器进行科学的保护处理迫在眉睫。