火焰原子吸收光谱法测定尿中的钾钠

对24小时尿中微量元素钾、钠、火焰原子吸收法的测定进行了研究,并确立了测定钾和钠的优化条件。加入氯化铯可消除电离干扰,加入镧盐可消除基体干扰,当稀释比例达到1:1000时,可以消除尿基质的干扰。回收率分别为98.7%～105.2%、99.4%～103.4%,精密度为0.64%～0.87%、0.43%～0.81%。结果表明,方法简单准确。     

用火焰原子吸收法直接测定白酒中的锰含量

叙述用火焰原子吸收法直接测定白酒中的锰含量,北与高碘酸钾法测定锰作比对试验,提出原子吸收法具有操作简便,灵敏度高等特点。     

原子吸收分光光度计的发展与应用

原子吸收分光光度计主要用于测定各种材料中指定元素的含量,其在同位素研究、材料测定、元素测定等领域中都有所应用。随着信息技术的快速发展,越来越先进的技术被应用到原子吸收分光光度计中,文章对原子吸收分光光度计的原理、应用和发展情况进行分析与介绍。     

塞曼原子吸收光谱法测定磷酸中钠的质量控制

采用火焰原子吸收法测定钠,方法简便、快速、灵敏度高,但是,由于磷酸中钠的含量极低,受基体和背景以及粘度的影响很大,而且样品容易沾污。本文通过对校准曲线法和标准加入曲线法对比测定,以及对这 测定和加标回收率试验,采用了质量控制图进行实验控制,从而获得了准确、可靠的质量控制检测结果。     

单镍盐着色槽硼酸含量快速测定方法研究

文章研究铝型材加工表面处理单镍盐着色槽硼酸含量快速测定方法.硼酸酸碱滴定测定的关键环节是加入甘露醇使硼酸转化成强化络合酸的完全程度、基体干扰的排除和精准的滴定终点指示方法.通过10次平行测定合成模拟样品和10次平行测定槽液样品硼酸含量计算相对标准偏差确定方法精密度,采用试样加标回收率试验确定方法的准确度.该方法具有快捷、准确、稳定和实用性强的优点.     

原子吸收分光光度法测定肥料中氧化钾含量

钾是农作物不可缺少的元素,也是复混肥料中的主要养分之一.GB/T 8574-2002采用重量法测定氧化钾,步骤相对复杂,受检验人员操作影响较大,同时耗时长,成本高.本法在酸性条件下,采用钾的次灵敏线404.4nm,原子吸收分光光度法测定肥料中氧化钾,步骤简单、快捷,检验成本低,结果准确,尤其适合大批量样品的测定.     

论ADPC-MIBK萃取火焰吸收法与石墨炉原子吸收法测定地表水中镉、铅、铜的对比研究

当前用于水质镉、铅、铜元素测定的方法有许多种,但地表水当中目标元素实际含量不高,许多测定方法都存在准确度低等问题,如受到其他微量元素的直接影响等,对于这种情况,为保证测定准确度,主要应用两种地表水测定方法,分别为ADPC-MIBK萃取火焰吸收和石墨炉原子吸收法.     

恒山黄芪重金属污染物含量的评估

为了评估恒山黄芪重金属污染物含量情况,采集了恒山山脉4个县36份黄芪样品,用石墨炉原子吸收分光光度法测定黄芪中铅、镉、铬含量,用原子荧光光度法测定砷、汞含量,用微波消解-电感耦合等离子体原子发射光谱法测定镍、铜含量。参照食品安全国家标准规定的检测方法,采用了微波消解前处理技术,对样品质量、仪器设备条件进行了优化。     

火焰原子吸收法测碘盐中的微量镉

本文研究在pH为2~3条件下,碘盐中的镉与吡咯烷基二硫代氨基甲酸铵(APDC)可以螯合成稳定镉的金属螯合物,再将PH调到4左右加入通过甲基异丁基甲酮(MIBK)进行萃取,然后准确加入一定体积的盐酸溶液,将镉的金属螯合物从有机相中反萃取出来,之后将水相导入火焰原子吸收光谱仪测定.确定了火焰原子吸收光谱仪的最佳实验条件.操作简单、测量耗费时间较少、灵敏度高,析速度快、精度高、测定元素范围广、背景干扰较少等优点适合在实际工作中应用.     

利水渗湿类中草药中金属元素的含量测定

采用4:1的混酸体系作为消化液进行样品消解,火焰原子吸收分光光度法(FAAS)测定了五种利水渗湿类中草药中金属元素Cu、Mn、Zn和Fe的含量。     

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.     

What helps? Women engineers' accounts of staying on

We have considerable understanding of the obstacles that women engineers encounter and the reasons that they leave the field, but we know less about what enables them to remain. Adopting an interpretivist approach, this article examines how a group of British women engineers in two FTSE 100 companies account for “staying on” in their male‐dominated work settings. We delineate four specific forms of help that facilitate women's retention in the field. We argue that exposure to help leads to women developing a habitus that enables them to continue working in engineering. To conclude, we draw on our findings to outline HR practices that will facilitate supportive relationships in the workplace and pave the way towards developing more positive organisational climates.     

论现代物流企业的发展观

物流业经过诸多年的发展目前已经成为最热门的行业之一,物流企业的注册数量也与日俱增,达到前所未有的规模。毋庸置疑,任何企业都希望自己迅速做强做大,并成为真正现代物流企业的典型代表,要实现这一目标一个首要问题就是要解决现代物流企业的发展观问题。