Visualization of latent fingerprints using fluorescence lifetime imaging on paper emitting strong fluorescence

Latent fingerprints were successfully visualized using fluorescence lifetime imaging (FLIM) on paper which emits strong fluorescence with a lifetime close to that of fingerprints and thus from which it is difficult for time-resolved spectroscopy to visualize fingerprints. Latent fingerprint samples on paper were excited using a 450 nm or 532 nm nanosecond pulsed-laser, and time-resolved fluorescence images were obtained at a delay time of 6–16 ns in intervals of 1 ns, to the excitation pulse. The excitation beam was expanded using a lens, and the fluorescence from the fingerprints was captured using an intensified CCD camera. Because of the large fluorescence intensity of the background paper of approximately two to four orders of magnitude larger than that of the fingerprint, the fingerprint was not visualized on each fluorescence image by time-resolved spectroscopy. However, the fingerprint was visualized in a FLIM image constructed using a series of the fluorescence images for the case with the fluorescence intensity of the background paper being four orders of magnitude larger than that of the fingerprint. The difference in fluorescence lifetime in the FLIM image of the visualized fingerprint and background paper was in the order of 0.1 ns, which was an order of magnitude smaller than the inherent fluorescence lifetime of a few nanoseconds for the fingerprints and paper. It was demonstrated that, at a background fluorescence intensity with a certain order of magnitude larger than that of fingerprints, FLIM has the potential to visualize latent fingerprints which cannot be visualized by time-resolved spectroscopy.     

Possible Fatal Acetaminophen Intoxication with Atypical Clinical Presentation

Acetaminophen or paracetamol, a commonly used over‐the‐counter analgesic, is known to elicit severe adverse reactions when taken in overdose, chronically at therapeutic dosage or, sporadically, following single assumptions of a therapeutic dose. Damage patterns including liver damage and, rarely, acute tubular necrosis or a fixed drug exanthema. We present a case of fatal acetaminophen toxicity with postmortem blood concentration 78 μg/mL and unusual clinical features, including a visually striking and massive epidermolysis and rhabdomyolysis, disseminated intravascular coagulation and myocardial ischemia. This case is compared with the most similar previous reports in terms of organ damage, clinical presentation, and cause of death. We conclude that a number of severe patterns of adverse effects to acetaminophen are emerging that were previously greatly underestimated, thus questioning the adequacy of the clinical spectrum traditionally associated with acetaminophen intoxication and leading to the need to review this spectrum and the associated diagnostic criteria.     

Meet the Producer: Exchange Rate Shocks, Media Salience, and the Legislative Importance of Economic Sectors in Argentina

In the last 15 years, considerable efforts have been directed towards understanding how currency shocks affect the clout of economic actors. Little research, however, has studied how currency shocks affect the salience of key economic actors and their organizations among the public. In this article, we test for the effect of currency shock on the media salience and legislative importance of economic actors. We use a novel empirical design that (1) measures the level of media salience of 23 Labor, Rural, Business, and Financial Associations and (2) measures the targets of legislation initiated in key Congressional committees. Results show that currency shocks have moderate effects on the media salience of economic actors and more pronounced policy consequences, reflected on the legislative importance of key economic jurisdictions in Congress.     

Political Quid Pro Quo Agreements: An Experimental Study

We experimentally study the common wisdom that money buys political influence. In the game, one special interest (i.e., a corporate firm) has the opportunity to influence redistributive tax policies in her favor by transferring money to two competing candidates. The success of the investment depends on whether or not the candidates are willing and able to collude on low‐tax policies that do not harm their relative chances in the elections. In the experiment, successful political influence never materializes when the firm and candidates interact just once. By contrast, it yields substantially lower redistribution in about 40% of societies with finitely repeated encounters. However, investments are not always profitable, and profit sharing between the firm and candidates depends on prominent equity norms. Our experimental results shed new light on the complex process of buying political influence in everyday politics and help explain why only relatively few firms do actually attempt to influence policymaking.     

Suicidal or Homicidal Sharp Force Injuries? A Review and Critical Analysis of the Heterogeneity in the Forensic Literature

The differential diagnosis between self-inflicted and nonself-inflicted, suicidal and homicidal, injuries is difficult or impossible in many cases and, above all, cannot be made on the basis of information obtained solely from the autopsy or the medicolegal clinical examination. The purpose of this study is to analyze the literature on suicidal and homicidal sharp force injuries and identify the relevant parameters that may help differentiate between suicidal and homicidal deaths. To achieve this goal, a review of 595 potentially relevant articles was performed. After excluding the nonrelevant papers by screening the titles, all abstracts were reviewed, and articles meeting the inclusion criteria underwent a full-text review. The following parameters were compiled into a table: number of cases, localization of the injuries, and number of injuries. The data were statistically analyzed and compared with those available in the forensic literature. On the basis of the heterogeneity of data revealed by the present review, a simple and short checklist of the parameters that should be included when reporting suicides and homicides by sharp force has been proposed.     

Contested Discourses on National Identity: Representing Nicaraguan Immigration to Costa Rica

This article explores the ways in which the immigration of Nicaraguans to Costa Rica is represented by Costa Rican institutions and individuals through public discourses and everyday life. Three discourses are considered. First, intellectual claims that immigration poses a threat to Costa Rican national identity, whereby intellectuals portray 'Costa Rica in crisis' due to immigration. Second, fictional works seek to represent issues regarding the Nicaraguan community in innovative ways, being open‐ended and including diverse voices. Third, stories written by Nicaraguan children are discussed in view of exploring how hostility towards immigration interpellates them, who face the challenge of negotiating their identities with their peers in everyday life. The article ends by asking for a politics able to defend public institutions and public investment, able to forge networks of solidarity with immigrant communities.     

Detection of trace drugs of abuse in baby formula using solid‐phase microextraction direct analysis in real‐time mass spectrometry (SPME‐DART‐MS)

The intentional or unintentional adulteration of baby formula with drugs of abuse is one of the many increasingly complex samples forensic chemists may have to analyze. This sample type presents a challenge because of a complex matrix that can mask the detection of trace drug residues. To enable screening of baby formula for trace levels of drugs, the use of solid‐phase microextraction (SPME) coupled with direct analysis in real‐time mass spectrometry (DART‐MS) was investigated. A suite of five drugs was used as adulterants and spiked into baby formula. Samples were then extracted using SPME fibers which were analyzed by DART‐MS. Development of a proof‐of‐concept method was completed by investigating the effects of the DART gas stream temperature and the linear speed of the sample holder. Optimal values of 350°C and 0.2 mm/s were found. Once the method was established, representative responses and sensitivities for the five drugs were measured and found to be in the range of single ng/mL to hundreds ng/mL. Additional studies found that the presence of the baby formula matrix increased analyte signal (relative to methanolic solutions) by greater than 200%. Comparison of the SPME‐DART‐MS method to a traditional DART‐MS method for trace drug detection found at least a factor of 13 improvement in signal for the drugs investigated. This work demonstrates that SPME‐DART‐MS is a viable technique for the screening of complex matrices, such as baby formula, for trace drug residues and that development of a comprehensive method is warranted.     

Social or political cleavages? A spatial analysis of?the?party system in post-authoritarian Chile

Lipset and Rokkan??s (Party system and voter alignments: cross national perspectives, Lipset and Rokkan eds., New York: Free Press, pp. 1?C64, 1967) sociological model of cleavages and the so-called ??freezing hypothesis?? dominate theorizing about party system formation. Torcal and Mainwaring (Br. J. Polit. Sci. 33:55?C84, 2003) show the relevance of a purely political cleavage for structuring the party system in the case of Chile, challenging the freezing hypothesis??s claims. They also dispute case-specific research that argues Chile??s party system still reflects a ??three-thirds?? division between Left, Right, and Center. Revisiting this debate, our study employs spatial maps of the party system. Such political-economy models are rare in studies of Latin American politics. The application here supports a democratic/authoritarian political cleavage in Chile.