Raman spectroscopy and microspectrophotometry of reactive dyes on cotton fibres: Analysis and detection limits

A collaborative study on Raman spectroscopy and microspectrophotometry (MSP) was carried out by members of the ENFSI (European Network of Forensic Science Institutes) European Fibres Group (EFG) on different dyed cotton fabrics. The detection limits of the two methods were tested on two cotton sets with a dye concentration ranging from 0.5 to 0.005% (w/w). This survey shows that it is possible to detect the presence of dye in fibres with concentrations below that detectable by the traditional methods of light microscopy and microspectrophotometry (MSP). The MSP detection limit for the dyes used in this study was found to be a concentration of 0.5% (w/w). At this concentration, the fibres appear colourless with light microscopy. Raman spectroscopy clearly shows a higher potential to detect concentrations of dyes as low as 0.05% for the yellow dye RY145 and 0.005% for the blue dye RB221. This detection limit was found to depend both on the chemical composition of the dye itself and on the analytical conditions, particularly the laser wavelength. Furthermore, analysis of binary mixtures of dyes showed that while the minor dye was detected at 1.5% (w/w) (30% of the total dye concentration) using microspectrophotometry, it was detected at a level as low as 0.05% (w/w) (10% of the total dye concentration) using Raman spectroscopy. This work also highlights the importance of a flexible Raman instrument equipped with several lasers at different wavelengths for the analysis of dyed fibres. The operator and the set up of the analytical conditions are also of prime importance in order to obtain high quality spectra. Changing the laser wavelength is important to detect different dyes in a mixture.     

Death following injection sclerotherapy due to phenol toxicity

Prolapse rectum (PR) or protrusion of the rectum beyond the anus occurs frequently in populations at both extremes of age. In the pediatric population, in developed countries, the commonest cause for PR is thought to be cystic fibrosis (CF). Treatment options for CF include conservative management, surgical resection and fixation, suturing, and injection sclerotherapy (IS). The last is considered an attractive treatment option because it is minimally invasive. In this case report, the authors present the details about a 2-year-old female child, with PR and CF, who died after IS, using phenol as the sclerotherapeutic agent. Autopsy findings and toxicology tests performed to establish phenol toxicity are documented. The available literature is reviewed. This case report underscores the risks of using phenol for IS and emphasizes the point that the procedure is not innocuous and an adverse outcome including fatality is a possibility.     

Sentencing Juvenile Offenders to Life in Prison: The Political Sociology of Juvenile Punishment

Sentencing juvenile offenders to life in prison is the most severe criminal penalty available, yet we know little about the factors that produce jurisdictional differences in the use of such sanctions. Political explanations emphasize conservative values and the strength of more conservative political parties. Threat accounts suggest that this sentence will be more likely in jurisdictions with larger minority populations. After controlling for many explanations using count models, the results show that larger numbers of juvenile life sentences are handed out in more politically conservative states with a stronger Republican Party. Findings also show that racial politics is a factor in juvenile life sentences. Those jurisdictions that have the most blacks and have judicial elections sentence the most juveniles to life terms. By highlighting the explanatory power of public ideologies, these findings support political explanations for the harshest criminal punishment directed towards juveniles.     

Does Self-Control Influence Maternal Attachment? A Reciprocal Effects Analysis from Early Childhood Through Middle Adolescence

Objectives

The purpose of this study is twofold. First, this study assesses the extent to which self-control and maternal attachment mutually influence one another. Second, it investigates whether this process continues to occur during adolescence. To date, studies of the etiology of self-control have yet to adequately address these issues, despite the fact that a number of theoretical perspectives emphasize the reciprocal nature of the parent-child relationship.

Methods

The current study seeks to shed light on these issues by examining the relationship between self-control and maternal attachment using structural equation modeling for eight waves of data spanning a period of time that encompasses early childhood through middle adolescence.

Results

The results yield two findings bearing on the adequacy of Gottfredson and Hirschi??s model of self-control development. First, measures of self-control and maternal attachment were found to mutually influence one another during childhood. Second, these effects were reduced to nonsignificance during adolescence.

Conclusions

This study finds that self-control emerges during childhood in a complex manner in which it both shapes and is shaped by parental attachment.     

Transitions in the negotiations on climate change: from prisoner’s dilemma to chicken and beyond

Frequently, international environmental negotiations have been analyzed in two-agent (2 × 2) games. Yet, in order to involve additional strategies, (3 × 3) games gained attention recently. We employ such a (3 × 3) game setting in order to depict international negotiations on climate change and integrate both the prisoner’s dilemma and the chicken games in this setting. We analyze transitions of negotiation states and describe how ancillary benefits and first-mover advantages influence agents’ behavior in the negotiations, when three different strategies or levels of climate protection efforts are available. Finally, we also integrate strategies to mitigate and to adapt to climate change into the analysis in the (3 × 3) game setting.     

Variation in Adult and Juvenile Arrest Rates: The Influence of City Size and Metropolitan Environment

Since the mid-1990s, the index crime rate has steadily decreased while the rate for Part II offenses has increased. The current study examines these differences from 1990 to 2004 using arrest rate data from the 35 largest cities in the state of Texas. Cluster regression analyses is employed to examine the effect of city size and city location, whether the city is part of a larger metropolitan area or “stand-alone,” to explain variation in juvenile and adult arrest rates by category of offense (violent, property, Part II) while controlling for the influence of social disorganization variables. Findings indicate that differences exist in the arrest rates for almost all types of offenses in mid-size versus very large cities. Contrasting adult versus juvenile arrest rates, city size and city location offer limited explanation for variation over time. Implications of these findings are discussed in the context of suggested policy and research directions.     

Deprogramming: from private self-help to governmental organized repression

This paper examines deprogramming, a multi-faceted form of derecruitment from unpopular religious groups (“cults”) developed in the United States and then spreading to other nations, as a form of social control of new religious movements. The early history of deprogramming in the United States is discussed, and then its more recent application in Japan against members of the Unification Church is detailed. A continuum is presented that has self-help remedies at one end, and governmental repression at the other. Self-help forms of deprogramming are illustrated mainly by the United States which has First Amendment protections for religious groups which afford some protection from governmental intervention. Governmental forced derecruitment is illustrated by China’s effort to stamp out the Falun Gong through a very systematic official governmental program involving many institutions operating with full support of the government and the Chinese Communist Party. In between these extremes are cases such as Japan’s social control efforts, and some within the United States, where governmental officials and agencies turn a “blind eye” to self-help remedies, allowing them to operate, or even engage in covert activities to suppress unpopular religious groups.     

Community-level impacts of temperature on urban street robbery

Purpose

Conduct the first empirical intra-urban examination of community-level connections between street robbery and temperature. Examine whether community socioeconomic status (SES) and crime-relevant land uses strengthen or weaken the temperature impact. A theoretical framework relying on routine activity theory, crime pattern theory, and resident-based control dynamics organized predictions.

Data and methods

For Philadelphia census tracts (n = 381), monthly street robbery counts and temperature data for 36 consecutive months were combined with census and land use data, and analyzed with multilevel models.

Results

Community robbery counts were higher when temperatures were higher, and in lower SES communities. In support of previous work with property crime, but in contrast to previous work with assault, the effects of temperature were stronger in higher SES communities. In support of the integrated model, commercial land use prevalence and subway stations were associated with heightened temperature impacts on robbery.

Conclusions

Community-level fixed and random effects of temperature on urban robbery counts persist when controlling for land use and community structure; further, the random effects depend in part on both. There are implications for understanding indigenous guardianship or informal resident-based place management dynamics, and for planning seasonal police deployments.