High-speed multicolor microscopy of repeating dynamic processes

Images of multiply labeled fluorescent samples provide unique insights into the localization of molecules, cells, and tissues. The ability to image multiple channels simultaneously at high speed without cross talk is limited to a few colors and requires dedicated multichannel or multispectral detection procedures. Simpler microscopes, in which each color is imaged sequentially, produce a much lower frame rate. Here, we describe a technique to image, at high frame rate, multiply labeled samples that have a repeating motion. We capture images in a single channel at a time over one full occurrence of the motion then repeat acquisition for other channels over subsequent occurrences. We finally build a high-speed multichannel image sequence by combining the images after applying a normalized mutual information-based time registration procedure. We show that this technique is amenable to image the beating heart of a double-labeled embryonic quail in three channels (brightfield, yellow, and mCherry fluorescent proteins) using a fluorescence wide-field microscope equipped with a single monochrome camera and without fast channel switching optics. We experimentally evaluate the accuracy of our method on image series from a two-channel confocal microscope

A transgenic quail model that enables dynamic imaging of amniote embryogenesis

Embryogenesis is the coordinated assembly of tissues during morphogenesis through changes in individual cell behaviors and collective cell movements. Dynamic imaging, combined with quantitative analysis, is ideal for investigating fundamental questions in developmental biology involving cellular differentiation, growth control and morphogenesis. However, a reliable amniote model system that is amenable to the rigors of extended, high-resolution imaging and cell tracking has been lacking. To address this shortcoming, we produced a novel transgenic quail that ubiquitously expresses nuclear localized monomer cherry fluorescent protein (chFP). We characterize the expression pattern of chFP and provide concrete examples of how Tg(PGK1:H2B-chFP) quail can be used to dynamically image and analyze key morphogenetic events during embryonic stages X to 11

Country, sex, and parent occupational status: Moderators of the continuity of aggression from childhood to adulthood

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/109352/1/ab21546.pd

Filipino Mothers’ Self-Efficacy in Managing Anger and in Parenting, and Parental Rejection as Predictors of Child Delinquency

The authors tested a model in which Filipino mothers’ self-efficacy in managing anger/irritation influenced child delinquency via two parenting variables: parental self-efficacy and parental rejection. Structured interviews were conducted with 99 mothers twice with an interval of one year with efficacy beliefs and rejection measured in the first year and child delinquency data collected in the following year. Path analyses showed that self-efficacy in managing anger/irritation negatively predicted child delinquency indirectly through the sequential mediation of parental selfefficacy and parental rejection. Results provided further evidence for the importance of efficacy beliefs, particularly self-efficacy in managing anger/irritation and parental self-efficacy, in the domain of child development

Beyond the individual: Household activity of daily living limitations, urban-rural residence, and mental health

Activity of daily living (ADL) limitations, such as difficulty walking or dressing, are increasing as populations age and experience more chronic conditions. To understand the scope of ADLs and make interventions more effective, it is important to examine ADLs beyond the individual to other levels and contexts, such as the household. Thus, using household and individual level survey data in India, we assess how household ADLs relate to the mental health of others in the household. We find that around 40 % of households have at least one resident with an ADL limitation, with ADL limitations more likely in households that are in rural areas, have older residents, and are socioeconomically disadvantaged. Household ADL limitations are associated with increased symptoms of depression and anxiety with the relation varying by the number of household members with an ADL limitation. For adults, having any household member with an ADL limitation is associated with increased mental health symptomology, whereas for young adults, this association only appears for those with multiple household members with an ADL limitation. Further, we find that the relation between household ADL limitations and mental health is stronger for those living in rural areas compared to urban areas. That is, when comparing individuals with the same number of household members with ADL limitations, predicted mental health symptomology is higher for those living in rural areas than for those in urban areas. These findings suggest the need for household centered accommodations and supports that consider the social and environmental context

The developmental course of illicit substance use from age 12 to 22: links with depressive, anxiety, and behavior disorders at age 18

Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/72027/1/j.1469-7610.2008.01915.x.pd

Global study of social odor awareness

Olfaction plays an important role in human social communication, including multiple domains in which people often rely on their sense of smell in the social context. The importance of the sense of smell and its role can however vary inter-individually and culturally. Despite the growing body of literature on differences in olfactory performance or hedonic preferences across the globe, the aspects of a given culture as well as culturally universal individual differences affecting odor awareness in human social life remain unknown. Here, we conducted a large-scale analysis of data collected from 10,794 participants from 52 study sites from 44 countries all over the world. The aim of our research was to explore the potential individual and country-level correlates of odor awareness in the social context. The results show that the individual characteristics were more strongly related than country-level factors to self-reported odor awareness in different social contexts. A model including individual-level predictors (gender, age, material situation, education and preferred social distance) provided a relatively good fit to the data, but adding country-level predictors (Human Development Index, population density and average temperature) did not improve model parameters. Although there were some cross-cultural differences in social odor awareness, the main differentiating role was played by the individual differences. This suggests that people living in different cultures and different climate conditions may still share some similar patterns of odor awareness if they share other individual-level characteristics

Bidirectional Relations between Parenting and Behavior Problems from Age 8 to 13 in Nine Countries

This study used data from 12 cultural groups in nine countries (China, Colombia, Italy, Jordan, Kenya, Philippines, Sweden, Thailand, and the United States; N = 1,298) to understand the cross‐cultural generalizability of how parental warmth and control are bidirectionally related to externalizing and internalizing behaviors from childhood to early adolescence. Mothers, fathers, and children completed measures when children were ages 8–13. Multiple‐group autoregressive, cross‐lagged structural equation models revealed that child effects rather than parent effects may better characterize how warmth and control are related to child externalizing and internalizing behaviors over time, and that parent effects may be more characteristic of relations between parental warmth and control and child externalizing and internalizing behavior during childhood than early adolescence

The changing association between pandemic-related stressors and child and adolescent mental health during the waning phase of the COVID-19 pandemic

This study examined the relation between pandemic-related stressors and mental health among young people (YP) in India during two time points in the waning phase of the pandemic. We use data from two cross-sectional waves of over 20,000 YP aged 5–19 in February 2022, during the peak of the Omicron wave, and October 2022, during a reduction in infections and easing of restrictions. COVID illness/death in the family’s social network, current lockdown stringency, and significant change in household income were examined in relation to adult respondents’ reports of YP internalizing symptoms. Internalizing symptoms declined slightly from February to October 2022. COVID-19 illness/death in the family’s network was generally associated with more internalizing symptoms. Higher lockdown stringency was associated with lower levels of internalizing symptoms. YP in households with increases in income tended to have more internalizing symptoms. Many associations were driven by older adolescents and were stronger during the earlier (Feb-2022) than later (Oct-2022) data collection time-points. The findings illustrate the importance of anchoring results within a study’s specific geographic context, including concurrent events during the study period. Importantly, findings that may initially seem counterintuitive ultimately illuminate the dynamic and complex processes underlying child and adolescent mental health