化妆品中邻苯二甲酸酯类化合物检测的方法学验证

目的：建立化妆品中邻苯二甲酸酯类化合物检测的方法学验证资料。方法：采用C18色谱柱250mm×4．6mm,5um色谱柱,检测波长为280nm,流速为1．OmI／min,柱温为25℃,流动相：A相为甲醇B相为水进行梯度洗脱,检测器为紫外检测器、二极管阵列检测器。结果：在选定色谱条件下,杂质峰与各主药峰完全分离,在一定范围内线性关系良好,邻苯二甲酸酯类化合物平均回收率高。结论：本法简便、准确,专属性好,可用于化妆品中邻苯二甲酸酯类化合物的含量测定。     

高效液相色谱法测定叶黄素软胶囊中主含量

文章采用高效液相色谱法(HPLC)测定叶黄素软胶囊中叶黄素的含量。色谱柱为Ultimate AQ-C18(4.6×250 mm;5μm),流动相为乙腈-甲醇(95∶5),流速为0.8 ml/min,用紫外检测器检测波长为446 nm,柱温为25℃。结果为:叶黄素在2.58-10.21μg/ml范围内线性良好,检测限为0.01μg/ml,相关系数为r=0.9997,平均回收率为90.3%,RSD为1.47%。此方法快速,且操作简单、准确,可用作叶黄素含量的测定。     

当归膜提取条件优选

目的:得到膜提取当归的最佳提取条件。方法:采用单因素实验,分别对提取液温度,压力和浓度进行了比较,以阿魏酸为指标成分,采用高效液相色谱法进行含量测定,其色谱条件为色谱柱:Shim-pack CLC-ODS柱;流动相:甲醇-1%的醋酸水(30:70);检测波长:322nm;流速:1.0mL.min-1;柱温:35℃;进样量:20μL。结果:微滤压力为0.14MPa,操作温度为室温(即20℃左右)料液稀释倍数为微滤前稀释定溶液的1/2时提取效果较好。结论:膜提取法提取当归可靠,简便,适合工业化生产。     

高效液相色谱法测定烟草中的维生素E

本文建立了烟草中维生素E含量的测定方法。样品用饱和抗坏血酸乙醇溶液萃取,液相色谱检测;色谱柱为Nova—PakC18（150mm×4．6mm,51μm）,流动相为98％的甲醇溶液,等度洗脱,FLD检测器检测（激发波长298nm,发射波长325nm）,流速1．0mL／min;方法检出限为0．03mg／g,日内精密度RSD为5．16％,日间精密度RSD为5．58％,回收率范围在92．7％-114．7％。     

高效液相色谱法测定阿仑膦酸钠片的溶出度

目的:建立高效液相色谱法测定阿仑膦酸钠片的溶出度。方法:色谱柱为PLRP-S 100(4.6mm×250mm,8μm),流动相为缓冲盐(取柠檬酸钠14.7g和磷酸氢二钠7.05g加水溶解并稀释至1000ml,用磷酸调节pH值为8.0)-乙腈-甲醇(75︰20︰5)为流动相,检测波长为266nm,流速:1.0mL.min-1。结果:本高效液相色谱法测定阿仑膦酸的质量浓度5.3～84.2μg.mL-1内呈良好的线性相关性,相关系数r=0.9999,平均回收率为99.65%,溶出度符合规定。结论:该方法准确、可靠、简便、易行,可作为制剂的溶出度测定方法。     

高效液相色谱法测定黄瓜中2,4-二氯苯氧乙酸的含量

本实验利用高效液相色谱法对黄瓜中2,4-二氯苯氧乙酸的含量进行检测。检测条件:色谱柱ODSHypersil C18,流动相:甲醇+1%磷酸水溶液,柱温:30℃,流速1.0ml/min,检测波长280nm,回收率为94.13%~103.67%,检出限为18μg/kg。     

农田水中吡虫啉的残留HPLC测定

文章采用高效液相色谱法测定农田水中吡虫啉的残留,试样用二氯甲烷震荡提取,以甲醇-水(28:72体积比)为流动相,高效液相色谱带紫外检测器检测,此方法吡虫啉浓度在0.05～100.00mg/L之间有很好的线性关系,最低检测限为0.005 mg/L,回收率在88%～101%之间,方法重复性良好.     

直接甲醇提取高效液相色谱法测定BHA、BHT

目的:建立一种油脂和食品中用甲醇将BHA、BHT溶解出来,在拟定的测定参数下,直接进样分离,检测的方法。方法:采用C18(250×4.60mm)色谱柱,流动相为0.02mol/L乙酸铵-甲醇(95:5体积比),流速:1ml/min,紫外检测波长280nm;进样量20μl;外标法定量。结果:方法标准曲线线性良好,BHA回归方程为:Y=2.127X-3.24,回归系数r=0.9997;BHT回归方程为:Y=60.32X+0.70,回归系数r=0.9998。添加质量浓度为0.01%～1.0%时BHA的回收率为93.6%～103.9%,BHT的回收率为97.5%～108.5%。结论:该方法操作简单、准确、回收率高,精密度良好,重现性好,可用于食用油、饼干等食品中BHA、BHT的测定。     

高效液相色谱法测定北虫草酒中的北虫草素

采用高效液相色谱法建立了虫草酒中虫草素含量的测定方法,探讨了色谱柱类型、流动相组成、柱温以及检测波长对分析结果的影响。研究表明:当色谱柱为WondaSilTM C18柱(150mm×4.6mm i.d.,5μm);流动相为乙腈-水(体积比为10:90),流速为1ml/min;检测波长258nm;柱温40℃;进样量5μl时分离、检测效果最佳,此法操作简便,样品只需用0.45μm微孔滤膜过滤处理,线性范围宽、重现性好、精密度高,效果令人满意,对于虫草酒的生产和质量检测都具有现实的指导意义。     

当归配方颗粒质量标准规范化研究

本实验对当归配方颗粒的质量标准进行研究。含量测定方法:采用奥泰公司C18色谱柱(220mm×4.6mm,5μm),甲醇-5%冰乙酸(20:80)为流动相,检测波长为313nm,流速为1.0ml/min,柱温为30℃。结论:本法简便、准确,可用于当归配方颗粒的质量标准研究。     

草甘膦铵盐原药的合成及可溶性粒剂的制备

在水介质中,采用草甘膦酸与氨水为原料直接制备得到草甘膦铵盐原药,并且反应母液可以循环套用,工艺简单,无生产废水,便于操作,产品质量稳定,是一条易于工业化的工艺路线,可制成可溶性颗粒剂。     

ICP-AES法测定土易溶盐中的CaO、MgO、SO4^2-

文章对土易溶盐的传统分析方法进行了一些改进,建立了ICP-AES测定土易溶盐中CaO、MgO、SO4^2-的方法。方法线性范围CaO为0.1～40 mg/L;MgO为0.02～10 mg/L,SO4^2-为0.2～100 mg/L。方法检出限CaO为0.022 4 mg/L,MgO为0.003 8 mg/L,SO4^2-为0.0279 mg/L。精密度（RSD）CaO为0.99%,MgO为1.71%, SO4^2-为1.66%。回收率（R）为96.0%～103.2%。     

Development in Information and Communications Technology (ICT) Statistics at the Australian Bureau of Statistics

This paper outlines the ICT statistical developments that the ABS has undertaken over recent years. These developments have been on both the supply side (ICT industry) and the demand side (use of IT by sector). The content of ABS ICT surveys has changed significantly over the last few years and are expected to develop further in line with industry changes and emerging policy needs.
Recent developments in household collections have been the inclusion of IT use questions in the 2001 Census of Population and Housing and in various ABS social surveys such as Children's Participation in Culture and Leisure Activities. Annual business IT use surveys are now conducted and include topics such as Internet commerce and IT security. Biennial ICT industry surveys are conducted to provide data on ICT production, imports and exports, ICT industry employment, performance and structure information. An Internet activity survey is run every six months and provides regional Internet access details and infrastructure details on Internet service providers.
A major development for 2002–03 will be the compilation of an ICT satellite account. ABS intends to produce an ICT Information Development Plan to guide its future statistical development work in the ICT field.     

Value at Risk in the Suburbs: Eminent Domain and the Geographical Politics of the US Foreclosure Crisis

Several US counties and local governments have recently considered a novel solution to the foreclosure crisis. They plan to use eminent domain to compel the owners of mortgage debt—and specifically of private‐label mortgage‐backed securities—to sell the debt to the government at a price reflecting the loan's market value. The government would then restructure the debt and resell it to new investors. The plans are striking because—in contrast to both development‐driven eminent domain and the federal subprime bank bailout—they would force investors to assume asset devaluation and increased long‐term risk. Notably, the plans have emerged as an instance of financialization‐focused politics in suburbs and suburban cities of color, specifically majority‐black and ‐Latino/a suburbs. Local support for the plans, we argue, is rooted in the long‐term disinvestment of these ‘suburbs of exception', which became targets of subprime lending and eventually sites where the ‘financial exception' has been localized. But these demographic shifts, fragmentation and fiscal pressures have at the same time created a suburban political terrain in which the plans have gained their strongest political support.     

Towards a Theory of Serendipity: A Systematic Review and Conceptualization

Serendipity – the notion of making surprising and valuable discoveries – plays a major role in the success of individuals and organizations alike. Previous research has established the importance of serendipity and identified important individual- and organizational-level antecedents. However, the literature has been dispersed and the boundaries of the concept have been blurry, leading to a lack of conceptual clarity and structure, and thus limiting validity and managerial actionability. Based on a systematic literature review, I synthesize existing management-related research on serendipity and explicate the emergence and composition of serendipity in the organizational context. I first identify three necessary conditions that differentiate serendipity from related concepts such as luck or targeted innovation: agency, surprise, and value. Then, I draw from the literature on sensemaking, event-based theorizing, and quantum-based approaches to management to conceptualize the process of cultivating serendipity in the organizational context as a process of enabling potentiality and materialization, and develop a multi-level theory of (cultivating) serendipity. This conceptualization contributes to our collective understanding of how, why, and when (i.e., under what conditions) organizations can leverage the value in the unexpected, which opens up fruitful avenues for further research.     

Accountability of NGOs in Bangladesh A critical overview

NGOs in Bangladesh have been recognized as effective change agents in the socio-economic arena throughout the world. Their contributions in micro credit, non-formal education and primary health care are widely known. NGOs play a significant role in society. NGO accountability, as a result, has become a critical issue. NGO accountability in Bangladesh has been examined here in relation to patrons, clients and themselves. Of the three relationships only accountability to patrons is in a near satisfactory state. Accountability to clients is handicapped by lack of opportunities of beneficiaries to participate meaningfully in NGO policy making. Accountability to themselves is adversely affected due to the adherence to a strictly hierarchical system and the influence of founding and charismatic NGO leaders.     

Towards an Asian model of human resource management? A comparative analysis of China,Japan and South Korea

There has been much discussion regarding the possible decline and weakening of national systems of human resource management (HRM). Yet, culture and institutions are often cited as the major stumbling blocks to this outcome. Such constraints may dissipate in the analysis, particularly if ‘regional clusters’ are considered where geographic and cultural closeness and ‘openness’ to similar economic pressures exist. In such cases, it might be postulated that convergence in HRM will occur. We argue that China, Japan and South Korea represent such a cluster. This article examines these countries, to see if a degree of convergence is taking place and if it is towards an identifiable ‘Asian’ model of HRM. A model of change is presented that distinguishes between levels of occurrence and acceptance. Details of the development and practice of HRM in each country are then set out. The article ends with a discussion and implications section and a brief conclusion.     

Ansätze und Ergebnisse anglo-amerikanischer M&A-Forschung

Based on a review of established U.S. management journals (1995–2003), six schools of thought are identified within the Anglo-American M&;A research: “Capital Market”, “Principal/Agent”, “Industrial Organization”, “Organizational Behavior”, “Human Resources” and “Strategic Management”. The literature review shows that the definition of M&;A success, the methods applied, and insights from empirical research differ according to the respective school of thought. Empirical studies focus on the resource combinations of merger partners, the specific circumstances of merger negotiations, and on integration management as antecedents of merger performance. Unfortunately, empirical findings have not yet provided reliable explanations for M&;A success. Based on the current state of Anglo-American M&;A research, the authors discuss implications for business practice, identify research gaps, and propose areas for future research.     

Introduction of New Technology with a Sound Transition of the Input-Output Structure

We examine the general equilibrium repercussions associated with the introduction of new technologies, using the generalized Leontief system that allows technological substitutions. We show that an untested introduction of cost-increasing technologies in any industry may result in creating a non-productive technological structure that does not satisfy the Hawkins-Simon condition, following the autonomous dynamic adjustment process with structural transitions in the economic system. Therefore, we propose a practicable control scheme of introducing cost-increasing technologies that strictly avoids the creation of non-productive structures in all periods of structural transition, using the available information on the ex ante technological structure.     

The Creation of the Office for National Statistics

A new Office for National Statistics was created in the United Kingdom in 1996 following a series of developments designed to strengthen the relevance and integrity of statistics. This paper describes these fundamental changes and sets out a blueprint for future progress. It also sets current developments in the United Kingdom in an historical and international context.