Concurrent reporting of adverse childhood experiences among perspectives of adolescents and caregivers.

The consequences of Adverse Childhood Experience (ACE) events in youth have predominantly been studied through retrospective studies that assess adults’ first 18 years of life or caregiver report of ACEs in youth. Reliance on only caregiver report to discern ACEs is a limitation amongst prior studies as research has found that caregivers tend to underestimate ACEs among their children, and there is even a greater discrepancy of reporting between caregivers and youth 12 years and older. Therefore, this study investigated concurrent reporting of self-report ACE scores in adolescents – defined in this study as 12 to 20 years old – and caregiver-reports of their adolescents’ ACE scores. Adolescents from three primary care clinics (N = 22; 63.6% Black/African American; 54.4% male) completed the Whole Child Assessment, while caregivers of the adolescents completed the Adverse Childhood Experience measure on behalf of their adolescent. Caregivers, whom all identified as women, ranged in age from 36 – 52 years old (N = 22, 63.6% Black/African American). Contrary to the hypothesis, ACEs reported by adolescents and caregivers were not significantly different (t(21) = 1.44, p = .19). Contrary to the prediction, adolescents did not report a higher mean ACE score compared to the caregiver’s report of the adolescent’s ACE score. The results have implications for identifying adverse experiences and connecting adolescents with resources to intervene and potentially negate harmful outcomes. Healthcare workers in the primary care setting who screen for adverse experiences may benefit from these findings to identify that a caregiver report does appear to accurately detect an adolescent’s ACE score in the primary care setting. These findings can lead to earlier detection of ACEs and mitigate the impact of long-term health outcomes. Additionally, accurate identification of ACEs has the potential to connect adolescents with appropriate resources

Full Bulk Spin Polarization and Intrinsic Tunnel Barriers at the Surface of Layered Manganites

Transmission of information using the spin of the electron as well as its charge requires a high degree of spin polarization at surfaces. At surfaces however this degree of polarization can be quenched by competing interactions. Using a combination of surface sensitive x-ray and tunneling probes, we show for the quasi-two-dimensional bilayer manganites that the outermost Mn-O bilayer, alone, is affected: it is a 1-nm thick insulator that exhibits no long-range ferromagnetic order while the next bilayer displays the full spin polarization of the bulk. Such an abrupt localization of the surface effects is due to the two-dimensional nature of the layered manganite while the loss of ferromagnetism is attributed to weakened double exchange in the reconstructed surface bilayer and a resultant antiferromagnetic phase. The creation of a well-defined surface insulator demonstrates the ability to naturally self-assemble two of the most demanding components of an ideal magnetic tunnel junction.Comment: 19 pages, 5 figure

Mechanism of thermally activated c-axis dissipation in layered High-Tc_c superconductors at high fields

We propose a simple model which explains experimental behavior of $c$-axis resistivity in layered High-T$_c$ superconductors at high fields in a limited temperature range. It is generally accepted that the in-plane dissipation at low temperatures is caused by small concentration of mobile pancake vortices whose diffusive motion is thermally activated. We demonstrate that in such situation a finite conductivity appears also in $c$-direction due to the phase slips between the planes caused by the mobile pancakes. The model gives universal relation between the components of conductivity which is in good agreement with experimental data.Comment: RevTeX, 4 pages, 2 Postscript figure

Prenatal Environmental Exposure to Persistent Organic Pollutants and Indices of Overweight and Cardiovascular Risk in Dutch Adolescents

Persistent organic pollutants (POPs) may have obesogenic effects. Knowledge about the effects of prenatal exposure to POPs on anthropometric measurements and metabolic parameters into adolescence is limited. Therefore, the aim of the current study was to determine whether prenatal environmental exposure to several POPs is associated with indices of overweight and cardiovascular risk in 13-15-year-old children. In this Dutch observational cohort study, 194 mother-infant pairs were included (1998-2002). Maternal pregnancy serum levels of PCBs, OH-PCBs, PBDEs, and other POPs were measured. At follow-up (2014-2016), levels of cholesterol, HDL-C, LDL-C, triglycerides, fasting insulin, fasting glucose, leptin, and adiponectin were measured in their children. The children's height, weight, waist circumference, hip circumference, and blood pressure were measured. In total, 101 adolescents (14.4 ± 0.8 years; 53.7% of invited) participated of which 55 were boys. Mean BMI was 19.1 ± 3.6 kg/m2 and mean BMI z-score 0.13 ± 1.14. Higher prenatal levels of PCBs were associated with lower levels of HDL-C and adiponectin in boys and higher levels of PBDEs with higher triglycerides in girls. We found significant differences by sex in the associations with OH-PCBs, with lower HDL-C and adiponectin, higher LDL-C/HDL-C ratio, fasting glucose, HOMA2-IR, height, and weight for boys. Our study indicates that higher prenatal exposure to PCBs, OH-PCBs, and PBDEs was associated with adolescent levels of some metabolic cardiovascular risk markers and hormones associated with the development of obesity and cardiovascular disease