Influence of ambient gas on self-reversal in Li transitions relevant to isotopic analysis.

Laser induced breakdown spectroscopy is a promising, rapid analysis method for the detection and quantification of Li and its isotopes needed in geochemical, nuclear, and energy storage applications. However, spectral broadening in laser produced plasmas, presence of fine and hyperfine structures, and self-reversal effects make Li isotopic analysis via laser induced breakdown spectroscopy challenging. The present study explores the influence of Ar, N2, and He ambient gases over the pressure range of 0.05 - 100 Torr on line broadening and self-reversal of the Li I transition with the greatest isotopic shift in the VIS spectral region (i.e., ≈670.8 nm, ≈15.8 pm isotopic shift). We perform spatially and temporally resolved optical emission spectroscopy of plasmas produced via laser ablation of LiAlO2 substrates. Our results show that the self-reversal and linewidth is reduced at lower pressures for all gases, and using optimized plasma conditions with chemometric methods, the 6Li/7Li isotopic ratios can be predicted.

Professor Hippo-on-Campus: Developing and evaluating an educational intervention to build mental health literacy among university faculty and staff.

Objective: The development and evaluation of the Professor Hippo-on-Campus Student Mental Health Education Program, a mental health literacy intervention for post-secondary faculty and staff, is described. It includes 3-hour virtual, asynchronous e-modules and an optional 2-hour, synchronous workshop. Participants: All faculty and staff in a single university were invited to participate (February 2020-January 2021). Methods: Pre-and post-module and post-workshop surveys were conducted, assessing knowledge, attitudes, stigma, behavioral intentions, and confidence. Paired t-tests and regressions assessed change. Satisfaction was assessed through closed and open-ended questions, analyzed descriptively and through qualitative content analysis. Results: Four hundred and fifty staff and faculty completed the pre-survey, 262 completed the post-survey, and 122 completed a workshop survey. Participation resulted in improvements in knowledge, attitudes, stigma, and confidence with high levels of satisfaction. Conclusion: The program provides tailored student mental health training to post-secondary staff and faculty, which appears to increase their mental health literacy.

Race and ethnic minority, local pollution, and COVID-19 deaths in Texas.

The costs of COVID-19 are extensive, and, like the fallout of most health and environmental crises in the US, there is growing evidence that these costs weigh disproportionately on communities of color. We investigated whether county-level racial composition and fine particulate pollution (PM2.5) are indicators for COVID-19 incidence and death rates in the state of Texas. Using county-level data, we ran linear regressions of percent minority as well as historic 2000-2016 PM2.5 levels against COVID-19 cases and deaths per capita. We found that a county's percent minority racial composition, defined as the percentage of population that identifies as Black or Hispanic, highly correlates with COVID-19 case and death rates. Using Value-of-Statistical-Life calculations, we found that economic costs from COVID-19 deaths fall more heavily on Black and Hispanic residents in Harris County, the most populous county in Texas. We found no consistent evidence or significant correlations between historic county-average PM2.5 concentration and COVID-19 incidence or death. Our findings suggest that public health and economic aid policy should consider the racially-segregated burden of disease to better mitigate costs and support equity for the duration and aftermath of health crises.

Recalling support provision decreases distress and anger in response to partner suffering.

OBJECTIVES: Thinking about a loved one's suffering can be emotionally stressful and have negative effects on a person's psychological and physical health over time. This study examined the hypotheses that when thinking about a partner's suffering (1) recalling past support provision to the suffering partner can decrease distress and anger and increase compassion, and (2) attachment orientation moderates these effects. METHOD: Seventy-seven older adult spouses of individuals with chronic pain were video-recorded while they disclosed: (1) an instance of partner suffering and (2) an instance of partner suffering plus their support provision. Compassion for the partner and their own distress and anger were self-reported immediately after each account. Accounts were coded for statements of support. Attachment was assessed with the Experiences with Close Relationships measure. RESULTS: As hypothesized, distress and anger were lower in the 'suffering with support' condition versus the 'suffering only' condition. There was no evidence that attachment orientation significantly moderated the effect of support recollection on emotional responses; however, more avoidant individuals reported less compassion and anger and used more words reflecting anger across conditions. More anxiously attached individuals reported greater compassion across conditions. CONCLUSION: When thinking about a partner's suffering, there are attachment-related differences in emotional reactions. Yet, regardless of these differences, it may be adaptive for spouses to think about their role in providing support to their partner to decrease their own negative emotions.

Lithium and Valproate Levels Do Not Correlate with Ketamine's Antidepressant Efficacy in Treatment-Resistant Bipolar Depression.

Ketamine and lithium both inhibit glycogen synthase kinase 3. In addition, lithium and ketamine have synergistic antidepressant-like effects at individually subeffective doses in rodents. We hypothesized that ketamine's antidepressant effects would be improved by therapeutic doses of lithium versus valproate and that serum lithium levels would positively correlate with ketamine's antidepressant efficacy. Thirty-six patients with treatment-resistant bipolar depression maintained on therapeutic-dose lithium (n = 23, 0.79 ± 0.15 mEq/L) or valproate (n = 13, 79.6 ± 12.4 mg/mL) received 0.5 mg/kg ketamine infusion in a randomized, double-blind, placebo-controlled, crossover trial. The primary depression outcome measure-the Montgomery-Åsberg Depression Rating Scale (MADRS)-was assessed before infusion and at numerous postinfusion time points. Both lithium (F 1,118 = 152.08, p < 0.001, and d = 2.27) and valproate (F 1,128 = 20.12, p < 0.001, and d = 0.79) significantly improved depressive symptoms, but no statistically significant difference was observed between mood stabilizer groups (F 1,28 = 2.51, p = 0.12, and d = 0.60). Serum lithium and valproate levels did not correlate with ketamine's antidepressant efficacy. Although the study was potentially underpowered, our results suggest that lithium may not potentiate ketamine's antidepressant efficacy in treatment-resistant bipolar depression.