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141.
Tagging of writing/printing inks with suitable inorganic taggants such as rare-earth chelates has the potential to help document examiners identify fraud in sensitive written/printed documents. Selection of rare-earth chelates as taggants primarily depends on the satisfactory sensitivity of analytical determination and the absence of the taggants in normal varieties of inks used for document writing/printing. Spectrofluorometric determination of trace amounts of europium in blue ballpoint pen inks and offset printing inks tagged with europium thenoyltrifluoroacetonate was carried out with sodium tungstate solution. Sodium tungstate acts as a specific reagent that enhances the fluorescence intensity of the Eu3+ ion. The excitation and emission wavelengths are 270 nm and 605 nm respectively. The results were compared with the data obtained with ICP-AES. Satisfactory recoveries were observed with precision better than 5% RSD and comparable accuracy. Under the optimized experimental conditions, detection limits and quantitation limits were determined. The detection limits obtained by spectrofluorometry and ICP-AES were 0.01 microg/mL and 0.006 microg/mL respectively whereas the limits of quantitation were about 0.03 microg/mL and 0.018 microg/mL respectively. The spectrofluorometric method is rapid, selective, sensitive and accurate for the determination of europium in blue ballpoint pen ink and offset printing inks and may be suitable for application in the examination of sensitive documents to aid in document related crime investigation. The advantages and limitations of the tagging approach and proposed analytical techniques are discussed. 相似文献
142.
Martha Joynt Kumar 《Public administration review》2008,68(4):603-617
Presidential transitions make a difference to the quality of the start a chief executive has coming into office. With formal presidential transitions a reality since 1952, we have sufficient experience to identify some of the elements of an effective transition. This article focuses on how a president-elect can minimize the hazards and take advantage of the opportunities transitions offer. Opportunities and hazards can be found in the actions and commitments candidates take during their presidential campaigns, the information they gather on past transitions and on the actions of the incumbent president, the coordination they do with those in the Washington community, and their capacity to identify and take advantage of the early goodwill that exists when a new president comes into office. 相似文献
143.
T. K. Vinod Kumar 《Crime, Law and Social Change》2010,54(5):303-323
The United Nations peace process in Sierra Leone is one of the most successful initiatives in conflict resolution in the history
of the UN. The peace building process has led to sustainable peace in a country located in a highly conflict ridden region
in the world. This paper analyzes the peacemaking process to understand the process and its underlying unique features. Placing
the events in the context of peacemaking criminology and human rights, it is argued that the UN peacemaking greatly reflects
the values advocated by peacemaking criminology, while the goals of the process reflect universal human rights, recognized
and promoted by the United Nations Declaration of Human Rights (UDHR). 相似文献
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149.
This paper provides a cradle-to-grave model of political merger between two states and highlights the role of cross-border disparities in material and technological endowments in state formation. This issue has not received adequate theoretical attention in the existing scholarship that has largely focussed on factors like defence, trade, and public goods provision. In this paper, merger negotiations are modelled using a bilateral bargaining model with inside options and contest as an outside option. It is shown that the threat of contest constrains the set of mutually acceptable taxes and, more importantly, it provides stability to the federal constitution by making the punishment strategy in the secession rule credible. The existence of negotiated and contested constitutional merger agreements that are path dependent but time-consistent is shown. Also, the rent extracted by the advanced province in the union for transferring technology to the backward province is shown to be increasing in the complexity of technology but bounded from above. Finally, the impact of demographic heterogeneity on the feasibility of inter-state mergers is discussed. 相似文献
150.
DNA profiling of disputed chilli samples (Capsicum annum) using ISSR-PCR and FISSR-PCR marker assays 总被引:4,自引:0,他引:4
A case of marketing of spurious seeds of chilli, Capsicum annum in the brand name of an elite variety referred to us from an Indian court of law, for identification is described here. The highly reproducible molecular marker assays, inter simple sequence repeat polymerase chain reaction [ISSR-PCR] and FISSR-PCR (for fluorescent ISSR-PCR) were used for differentiating the four disputed chilli samples. A total number of 17 ISSR anchored primers, which included nine di-, and eight tri-nucleotide primers were used for the analysis. The ISSR-PCR products were separated on a 2% agarose gel. A total of 212 and 288 bands were resolved by seven di- and eight tri-nucleotide primers, respectively, with an average of 30 bands per primer. Five out of nine dinucleotide primers and four out of eight trinucleotide primers could unambiguously differentiate all the four disputed chilli samples. The sensitivity and informativeness of the ISSR-PCR assay were further enhanced by the use of FISSR-PCR technique. The FISSR-PCR assay revealed a total number of 566 bands using three tri- and one di-nucleotide primers with an average of 141 bands per primer. These four primers could reliably distinguish all the four disputed samples unambiguously. In developing countries like India, violation of Plant Breeder's Rights is a major concern of law. The present report is, therefore, a step to protect the Plant Breeder's Rights by making use of reliable and modern DNA technologies. 相似文献