The Negative Relationship between Religiosity and Substance Use

The negative association between religiosity and substance abuse is well established in previous literature. Scholarly research continues to find support for both intrinsic and extrinsic religiosity functioning as protective factors against substance abuse with intrinsic religiosity’s negative correlation with substance use being more established in literature than extrinsic religiosity. This study focuses on the relationship between college student intrinsic and extrinsic religiosity, measured by the Intrinsic/Extrinsic Religiosity Scale and substance use, measured by the Texas Christian University Drug Screen-5 (TCUDS-5). The Intrinsic/Extrinsic Religiosity Scale and the TCUDS-5 are well established instruments with historically high internal consistency. We hypothesized that there was a negative correlation between religiosity scores and substance use scores among our population. Additionally, we hypothesized that intrinsic religiosity would have a stronger relationship with substance use than extrinsic religiosity would. In order to test our hypothesis, a survey was administered to undergraduate students at a university in the southeast. After cleaning the data, our total sample consisted of 386 students. Of those surveyed, 256 are female, 127 are male, and 1 classified other. The majority of the population identified as White (n = 328), followed by Black (n = 28), Hispanic (n = 23), and Asian, Native American/Pacific Islander, Multiracial, or Other (n = 7). All students received extra credit as an incentive to voluntarily complete a larger battery of measures related to habits and addiction. However, this analysis will only include the Intrinsic/Extrinsic Religiosity Scale (M = 12.019, SD = 5.55) and the TCUDS-5 (M = 0.762, SD = 2.004). A Pearson correlation was completed to determine whether there was a statistically significant relationship between religiosity and substance use in college students. All analyses were conducted using JASP. Results supported our hypothesis with findings indicating evidence for a statistically significant negative correlation between intrinsic religiosity and substance abuse (r = -.142, p = .005). Our hypothesis that extrinsic religiosity will not be as strongly related to substance use as intrinsic religiosity was supported for social extrinsic religiosity (r = -.121, p =.018), but not supported for personal extrinsic religiosity measure (r = -.15, p =.002). The results of this study contribute to the converging evidence that intrinsic religiosity is inversely related to substance use and could serve as a protective factor against problematic substance use. Those who have internalized their faith may rely on faith to cope with stress rather than use substances or restrict use due to religious beliefs. Thus, this study provides potential support for the theory that religiosity is a protective factor against substance use disorders. Future research should investigate the longitudinal impact of religiosity on substance use in college students and other populations

Highly efficient transfection of human induced pluripotent stem cells using magnetic nanoparticles.

PurposeThe delivery of transgenes into human induced pluripotent stem cell (hiPSC)-derived cardiomyocytes (hiPSC-CMs) represents an important tool in cardiac regeneration with potential for clinical applications. Gene transfection is more difficult, however, for hiPSCs and hiPSC-CMs than for somatic cells. Despite improvements in transfection and transduction, the efficiency, cytotoxicity, safety, and cost of these methods remain unsatisfactory. The objective of this study is to examine gene transfection in hiPSCs and hiPSC-CMs using magnetic nanoparticles (NPs).MethodsMagnetic NPs are unique transfection reagents that form complexes with nucleic acids by ionic interaction. The particles, loaded with nucleic acids, can be guided by a magnetic field to allow their concentration onto the surface of the cell membrane. Subsequent uptake of the loaded particles by the cells allows for high efficiency transfection of the cells with nucleic acids. We developed a new method using magnetic NPs to transfect hiPSCs and hiPSC-CMs. HiPSCs and hiPSC-CMs were cultured and analyzed using confocal microscopy, flow cytometry, and patch clamp recordings to quantify the transfection efficiency and cellular function.ResultsWe compared the transfection efficiency of hiPSCs with that of human embryonic kidney (HEK 293) cells. We observed that the average efficiency in hiPSCs was 43%±2% compared to 62%±4% in HEK 293 cells. Further analysis of the transfected hiPSCs showed that the differentiation of hiPSCs to hiPSC-CMs was not altered by NPs. Finally, robust transfection of hiPSC-CMs with an efficiency of 18%±2% was obtained.ConclusionThe difficult-to-transfect hiPSCs and hiPSC-CMs were efficiently transfected using magnetic NPs. Our study offers a novel approach for transfection of hiPSCs and hiPSC-CMs without the need for viral vector generation

Intermediate Tail Dependence: A Review and Some New Results

The concept of intermediate tail dependence is useful if one wants to quantify the degree of positive dependence in the tails when there is no strong evidence of presence of the usual tail dependence. We first review existing studies on intermediate tail dependence, and then we report new results to supplement the review. Intermediate tail dependence for elliptical, extreme value and Archimedean copulas are reviewed and further studied, respectively. For Archimedean copulas, we not only consider the frailty model but also the recently studied scale mixture model; for the latter, conditions leading to upper intermediate tail dependence are presented, and it provides a useful way to simulate copulas with desirable intermediate tail dependence structures.Comment: 25 pages, 1 figur

Cooperativity of Kv7.4 channels confers ultrafast electromechanical sensitivity and emergent properties in cochlear outer hair cells.

The mammalian cochlea relies on active electromotility of outer hair cells (OHCs) to resolve sound frequencies. OHCs use ionic channels and somatic electromotility to achieve the process. It is unclear, though, how the kinetics of voltage-gated ionic channels operate to overcome extrinsic viscous drag on OHCs at high frequency. Here, we report ultrafast electromechanical gating of clustered Kv7.4 in OHCs. Increases in kinetics and sensitivity resulting from cooperativity among clustered-Kv7.4 were revealed, using optogenetics strategies. Upon clustering, the half-activation voltage shifted negative, and the speed of activation increased relative to solitary channels. Clustering also rendered Kv7.4 channels mechanically sensitive, confirmed in consolidated Kv7.4 channels at the base of OHCs. Kv7.4 clusters provide OHCs with ultrafast electromechanical channel gating, varying in magnitude and speed along the cochlea axis. Ultrafast Kv7.4 gating provides OHCs with a feedback mechanism that enables the cochlea to overcome viscous drag and resolve sounds at auditory frequencies

Uncovering Burdens, Examining Needs, and Shedding Assumptions of Evidence-Based Social Support Programs for Mothers: A Descriptive Qualitative Study in a Remote Community

Many studies have demonstrated a significant burden of maternal stress and depression for women living on the Galápagos Islands. Here, we aim to uncover burdens and needs of women with young children on San Cristóbal Island and then explore options for implementing evidence-based programs of social support to meet these needs. We conducted 17 semi-structured qualitative interviews with mothers of young children, healthcare workers, and community stakeholders. We then used Summary Oral Reflective Analysis (SORA), an interactive methodology, for qualitative analysis. Despite initial reports of a low-stress environment, women described many sources of stress and concerns for their own and their children’s health and well-being. We uncovered three broad areas of need for mothers of young children: (1) the need for information and services, (2) the need for trust, and (3) the need for space. In response to these concerns, mothers, healthcare workers, and community leaders overwhelmingly agreed that a social support program would be beneficial for the health of mothers and young children. Still, they expressed concern over the feasibility of such a program. To address these feasibility concerns, we propose that a web-based education and social support intervention led by nurses would best meet mothers’ needs. Women could learn about child health and development, develop strong, trusting friendships with other mothers, and have their own space to speak freely among experts and peers

RICE Limits on the Diffuse Ultra-High Energy Neutrino Flux

We present new limits on ultra-high energy neutrino fluxes above 100 PeV based on data collected by the Radio Ice Cherenkov Experiment (RICE) at the South Pole from 1999-2005. We discuss estimation of backgrounds, calibration and data analysis algorithms (both on-line and off-line), procedures used for the dedicated neutrino search, and refinements in our Monte Carlo (MC) simulation, including recent in situ measurements of the complex ice dielectric constant. An enlarged data set and a more detailed study of hadronic showers results in a sensitivity improvement of more than one order of magnitude compared to our previously published results. Examination of the full RICE data set yields zero acceptable neutrino candidates, resulting in 95% confidence-level model dependent limits on the flux (E_\nu)^2(d\phi/dE_\nu)<10^{-6} GeV/(cm^2s~sr}) in the energy range 10^{17}< E_\nu< 10^{20} eV. The new RICE results rule out the most intense flux model projections at 95% confidence level.Comment: Submitted to Astropart. Phy

Entamoeba histolytica Dmc1 Catalyzes Homologous DNA Pairing and Strand Exchange That Is Stimulated by Calcium and Hop2-Mnd1

Meiosis depends on homologous recombination (HR) in most sexually reproducing organisms. Efficient meiotic HR requires the activity of the meiosis-specific recombinase, Dmc1. Previous work shows Dmc1 is expressed in Entamoeba histolytica, a eukaryotic parasite responsible for amoebiasis throughout the world, suggesting this organism undergoes meiosis. Here, we demonstrate Dmc1 protein is expressed in E. histolytica. We show that purified ehDmc1 forms presynaptic filaments and catalyzes ATP-dependent homologous DNA pairing and DNA strand exchange over at least several thousand base pairs. The DNA pairing and strand exchange activities are enhanced by the presence of calcium and the meiosis-specific recombination accessory factor, Hop2-Mnd1. In combination, calcium and Hop2-Mnd1 dramatically increase the rate of DNA strand exchange activity of ehDmc1. The biochemical system described herein provides a basis on which to better understand the role of ehDmc1 and other HR proteins in E. histolytica

Neuroendocrine Responses to Cold Pressor Stimuli in Midshipmen Participating in the Naval Special Warfare Screener.

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