Synthetic plastics are ubiquitously used in a broad range of applications, including food and drink packaging. Plastics often contain chemical additives, including bisphenols, phthalates, and terephthalic acid, which can degrade under thermal stress. The environmental presence of these chemicals is cause for public concern, especially in consumer products that utilize plastic packaging, as many have been identified as endocrine disruptors. This study sought to determine exposure to phthalates, bisphenols, and terephthalic acid by quantifying a broad spectrum of these analytes within three bottled water brands at varying temperature exposure levels using the combination of solid phase extraction followed by isotope dilution liquid chromatography-tandem mass spectrometry. Monobenzyl phthalate was detected in two of the three brands after bottles were heated to ~100 °C, ranging from 98 – 107 ng/L, and bisphenol A was detected in one brand at ~100 °C at an average concentration of 748 ± 36 ng/L. Subsequent mass loading calculations demonstrated that bioaccumulation of BPA from Brand C after high levels of temperature exposure well exceeded the tolerable daily intake (TDI). Findings in this study indicate that consumers should not be expected to incur harmful exposures to the target compounds under normal conditions as analytes were not measured in water bottle samples at 25 °C or 60 °C. Further studies should explore a more nuisance approach to heating over long durations, including that of ultraviolet exposure.

Background: Unintentional injury has been the leading cause of death for children and teenagers in the United States for the past 2 decades. Its health outcomes are often studied, but it may also relate to psychological concepts such as emotion dysregulation, which may also result in severe outcomes for individuals, families, and societies. There is no consensus on a conceptual definition of emotion dysregulation, and little prior literature on the specific relation between dysregulation and injury in the transition to adolescence. Methods: The current study aims to identify latent factors of emotion dysregulation using exploratory factor analyses. Subsequently, multilevel regressions illuminate relations between dysregulation and injury at 2 late childhood and early adolescence time points in a large ethnically, socioeconomically, and regionally representative sample of Arizona twins recruited from birth records and ongoing efforts. Results: 6 total factors representing emotion dysregulation at 2 ages were created. Factors were valid when tested against temperament and psychopathology constructs. No significant longitudinal or cross-sectional associations between emotion dysregulation factors and unintentional injury were found. Sex and rurality differences were found in factor scores and dysregulation outcomes. Discussion: The current study highlights new avenues of research and funding. Future research on this topic should reflect a concentrated and nuanced focus on injury. Concordant age 9 and age 11 factors loaded differently, which urges the field to strive toward developing a standardized definition for emotion dysregulation. Covariate differences highlight target populations for interventions in unintentional injury and emotion dysregulation, which remain independent areas of concern.

The objective goal of this research is to maximize the speed of the end effector of a three link R-R-R mechanical system with constrained torque input control. The project utilizes MATLAB optimization tools to determine the optimal throwing motion of a simulated mechanical system, while mirroring the physical parameters and constraints of a human arm wherever possible. The analysis of this final result determines if the kinetic chain effect is present in the theoretically optimized solution. This is done by comparing it with an intuitively optimized system based on throwing motion derived from the forehand throw in Ultimate frisbee.

The education that a student receives in the United States is influenced by an array of factors. One of the main influential factors is the financial resources a school has access to. Additionally, identities such as race, class, and gender all substantially impact the level of education a student has access to. Often students in minority groups, such as Hispanic students, experience additional challenging educational experiences than others. This is due to the intersectionality of their identities impacting their education. Within the Hispanic population, the unique educational experiences of Hispanic females are often disregarded. This paper analyzes the implications of intersectionality on the education of Hispanic females in Arizona. In order to examine this, a qualitative research study involving interviews with Hispanic female college students was done. Interviews consisted of questioning the participants about their K-12 educational experiences in Arizona’s education system, the school factors impacting their education, the familial factors impacting their education, and their college experiences. Key findings show that the educational experiences of Hispanic female students in Arizona are impacted by (a) familial support, (b) the role of Hispanic values/traditional gender roles, (c) a lack of financial resources, (d) an underrepresentation of Hispanic culture, (e) and inadequate college readiness resources. The findings of the study show that the intersectionality of gender and race/ethnicity creates additional disadvantages for the education of Hispanic female students. Furthermore, the results emphasize the need to take intersectionality into account when examining the educational differences that exist in the education system.