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A growing body of research has documented how gun violence can affect mental and physical health outcomes among adults. Likewise, the literature is also beginning to reveal negative psychological effects related to distress and hypervigilance and sociological implications around diminished community engagement and economic opportunity. However, there remains a need to fully explore the role of fear related to the experience of gun violence. Through a qualitative inquiry consisting of community resident focus groups and community leader interviews, this study examined how participants' perceptions of fear related to their exposures to and experiences of gun violence. The findings highlight the pervasive emotional experience of existing in a fearful, distressed, and/or anxious state within certain communities, and how civic disengagement, neighborhood disconnection, and economic disenfranchisement exist in communities that disproportionately experience violence., Competing Interests: Declaration of Conflicting InterestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

Throughout the last two decades, research on poly-victimization (PV) has evolved from examinations of a core set of past-year victimization types in youth samples to investigations of a broad range of victimization types experienced during variable time intervals in diverse samples of varying ages. As the concept of PV expands, greater clarity regarding the definition and measurement of PV is needed to advance understanding of its risk and protective factors as well as its associated outcomes. This scoping review aimed to (a) identify approaches used to operationally define and measure PV across studies and (b) synthesize empirical findings concerning risk factors and outcomes associated with PV. A systematic search of peer-reviewed research published before 2022 across 12 databases yielded 98 studies that met inclusion criteria. Study characteristics including the research design, sample type, victimization timeframe, operational definition(s) of PV, measurement of PV, analytic methods, and key findings were synthesized across studies. Findings indicated that the majority of reviewed studies were cross-sectional investigations that utilized categorical measures of lifetime PV in samples of youth. Results also demonstrated that PV is robustly associated with a broad range of predictors, including mental health symptoms and diagnoses as well as family- and community-level factors. PV is also associated with numerous adverse outcomes including depression, anxiety, suicidality, substance use, and delinquency across diverse study types and populations. Future research that examines the conditional effects of PV is needed to identify subgroups of individuals at higher risk of adverse outcomes following PV and modifiable targets for interventions., Competing Interests: Declaration of Conflicting InterestsThe author(s) declared no potential conflicts of interest with respect to the research, authorship, and/or publication of this article.

We show that the nucleic acid bases adenine, cytosine, guanine, thymine, and uracil, as well as 2,6-diaminopurine, and the "core" nucleic acid bases purine and pyrimidine, are stable for more than one year in concentrated sulfuric acid at room temperature and at acid concentrations relevant for Venus clouds (81% w / w to 98% w / w acid, the rest water). This work builds on our initial stability studies and is the first ever to test the reactivity and structural integrity of organic molecules subjected to extended incubation in concentrated sulfuric acid. The one-year-long stability of nucleic acid bases supports the notion that the Venus cloud environment-composed of concentrated sulfuric acid-may be able to support complex organic chemicals for extended periods of time.

What constitutes a habitable planet is a frontier to be explored and requires pushing the boundaries of our terracentric viewpoint for what we deem to be a habitable environment. Despite Venus' 700 K surface temperature being too hot for any plausible solvent and most organic covalent chemistry, Venus' cloud-filled atmosphere layers at 48 to 60 km above the surface hold the main requirements for life: suitable temperatures for covalent bonds; an energy source (sunlight); and a liquid solvent. Yet, the Venus clouds are widely thought to be incapable of supporting life because the droplets are composed of concentrated liquid sulfuric acid-an aggressive solvent that is assumed to rapidly destroy most biochemicals of life on Earth. Recent work, however, demonstrates that a rich organic chemistry can evolve from simple precursor molecules seeded into concentrated sulfuric acid, a result that is corroborated by domain knowledge in industry that such chemistry leads to complex molecules, including aromatics. We aim to expand the set of molecules known to be stable in concentrated sulfuric acid. Here, we show that nucleic acid bases adenine, cytosine, guanine, thymine, and uracil, as well as 2,6-diaminopurine and the "core" nucleic acid bases purine and pyrimidine, are stable in sulfuric acid in the Venus cloud temperature and sulfuric acid concentration range, using UV spectroscopy and combinations of 1D and 2D 1 H 13 C 15 N NMR spectroscopy. The stability of nucleic acid bases in concentrated sulfuric acid advances the idea that chemistry to support life may exist in the Venus cloud particle environment.