Beyond naming patterns in children with WFDs: definitions for nouns and verbs

Children who experience difficulties in naming are described as having word finding difficulties (WFDs). In the present study 31 children with WFDs were identified through a wider survey of educational provision for those with language and communication difficulties. The children were included if they were between 6;4-7;10 years, had normal non-verbal intelligence, no major articulation difficulties and had WFDs as diagnosed by standard scores below 75 on Test of Word Finding Difficulties (TWF, German, 1989). Three control groups were identified who were matched on: chronological age (N = 31), naming age (N = 31) and level of receptive grammar (N = 31). Children?s accuracy of naming and latency to name were assessed for pictures of objects and actions. Children were asked to define the object and action terms at a later point. Children with WFDs were significantly less accurate in naming than their age matched peers but equivalent to that of the language matched peers. The group of children with WFDs were the slowest to accurately name all sets of items. All groups of children were less accurate in the provision of definitions for action terms than object terms. Overall the children with WFDs provided fewer accurate definitions than their chronological age matched peers. The nature of the children?s definitions indicated that they also differed from their language-matched peers. Particular difficulties were noted in the provision of semantic categorisation information. A range of standardised language assessments did not account for these difficulties. The findings are discussed in relation to the idea that WFDs are caused by impoverished semantic representations

Intimate Partner Violence (IPV) and the Social Determinants of Aboriginal Peoples’ Health: A Case Study of First Nations Women’s Resilience, Resistance, and Renewal

Worldwide, First Nations women are among the most vulnerable to Intimate Partner Violence (IPV); and yet, their lived experiences of violence are lacking in the literature. Using Photovoice methodology and a community-based, participatory action approach, this project addresses multiple questions pertaining to First Nations mothers’ experiences of IPV, including: What are the health and social consequences of IPV and how do the social determinants of Aboriginal peoples’ health shape the capacities of women survivors to manage and overcome IPV? Drawing on decolonization theory, a social determinants of Aboriginal peoples’ health framework, and aspects of feminist theory, this project was designed to empower First Nations mothers to work toward a vision of quality care in Kettle & Stony Point First Nation; specifically, a system of health care that better meets the needs of IPV-affected community members. With the foundation provided by cultural principles and resources, such as spirituality and an ethic of responsibility, women survivors managed the severest of IPV experiences and are free of violence, and many of them thriving. This project’s process and outcomes point directly to resilience, or resistance to colonial conditions that generate and support ill health. Its main recommendation is that intervention with respect to IPV and its correlates restore and support community strengths and re-position resilient women in the centre of renewal. The women survivors who participated in this project effectively managed marginalization. And as grandmothers and mothers, they are invested in and dedicated to the health of our First Nations communities

The Impact of Investments in Maize Research and Dissemination in Zambia Part I: Main Report

Michigan State University (MSU) is currently assessing the impact of agricultural research on various commodities in seven African countries: Cameroon (maize, cowpea, sorghum), Kenya (maize, wheat), Malawi (maize), Mali (maize), Niger (sorghum, cowpea, millet), Uganda (oilseeds), and Zambia (maize). These countries were selected because they represent a variety of agro-ecological regions, and because their research systems have received significant levels of funding from USAID. The country studies undertaken by MSU are part of a series of research works recently commissioned to help USAID and the U.S. Congress analyze the effectiveness of aid given to strengthen national agricultural research systems in Africa. In Zambia, MSU collaborated with the Ministry of Agriculture, Food and Fisheries (MAFF) and the University of Zambia's Rural Development Studies Bureau (RDSB) to assess the impact of investments in maize research and dissemination made during the late 1970s and early 1980s. This research resulted in the release of ten new hybrids and open-pollinated varieties between 1984-88. Major support for maize research and dissemination came from the Government of Zambia (GRZ), the Centro Internaciónal de Mejoramiento de Maiz y Trigo (CIMMYT), the Food and Agriculture Organization/United Nations Development Program (FAO/UNDP), the Swedish International Development Authority (SIDA) and the United States Agency for International Development (USAID).food security, food policy, maize, Crop Production/Industries, Research and Development/Tech Change/Emerging Technologies, Downloads July 2008 - June 2009: 19, Q18,

Spin orientation and magnetostriction of Tb1−xDyxFe2 from first principles

The optimal amount of dysprosium in the highly magnetostrictive rare-earth compounds Tb1−xDyxFe2 for room-temperature applications has long been known to be x=0.73 (Terfenol-D). Here, we derive this value from first principles by calculating the easy magnetization direction and magnetostriction as a function of composition and temperature. We use crystal-field coefficients obtained within density-functional theory to construct phenomenological anisotropy and magnetoelastic constants. The temperature dependence of these constants is obtained from disordered-local-moment calculations of the rare-earth magnetic order parameter. Our calculations find the critical Dy concentration required to switch the magnetization direction at room temperature to be xc=0.78, with magnetostrictions λ111=2700 and λ100=−430 ppm, close to the Terfenol-D values

Site-specific modification of Shigella flexneri virF mRNA by tRNA-guanine transglycosylase in vitro

Shigella flexneri is an enteropathogen responsible for severe dysentery in humans. VirF is a key transcriptional regulator that activates the expression of the downstream virulence factors required for cellular invasion and cell-to-cell spread of this pathogen. There are several environmental factors that induce the translation of VirF including temperature, pH, osmolarity and post-transcriptional RNA modification. Durand and colleagues (vacC, a virulence-associated chromosomal locus of Shigella flexneri, is homologous to tgt, a gene encoding tRNA-guanine transglycosylase of Escherichia coli K-12. J. Bacteriol., 176, 4627–4634) have demonstrated a correlation between VirF and tRNA-guanine transglycosylase (TGT), which catalyzes the exchange of the hypermodified base queuine for the guanine in the wobble position of certain tRNAs. They characterized tgt- mutant S. flexneri strains in which the translation of VirF is markedly reduced and the bacteria are unable to invade host cells. Although the function of TGT is to modify tRNA, we report that the virF mRNA is recognized by the Escherichia coli TGT (99% identity to the S. flexneri TGT) in vitro. Further, we show that this recognition results in the site-specific modification of a single base in the virF mRNA. In the context of previous reports that small molecule binding motifs (‘riboswitches’) in mRNAs modulate mRNA conformation and translation, our observations suggest that TGT may modulate the translation of VirF by base modification of the VirF encoding mRNA

Substance Abuse Treatment in Correctional versus Non-Correctional Settings: Analysis of Racial/Ethnic and Gender Differences

Background Alcohol and drug abuse are widespread in the US. Substance abuse treatment services are effective, but utilization of services is low, particularly among African Americans, Hispanics, and women. Substance abuse is strongly associated with incarceration, and African Americans and Hispanics make up a disproportionate percentage of individuals with substance abuse problems involved in the criminal justice system. High treatment need, low treatment uptake, and the association between substance abuse and incarceration have led, in part, to correctional institutions filling the treatment gap by increasingly providing safety-net treatment services. We sought to better understand racial/ethnic and gender differences in determinants of treatment location (jail or prison versus non-correctional settings) among treatment-seeking adults. Methods We used repeated cross-sectional data from the National Survey on Drug Use and Health (2002-2016) to identify White, African American, and Hispanic past-year substance abuse treatment participants (n=6,435). We tested the modifying roles of race/ethnicity and gender on the association between several exposure variables and treatment locus using multiple logistic regression. Results Ten percent of treatment participants utilized treatment services in a jail or prison, which varied by race/ethnicity (9% of Whites, 15% of African Americans, 12% of Hispanics) and by gender (11% of men, 9% of women). In our fitted models, we found that educational attainment and past-year employment status varied in effect size between African Americans and Whites. The associations for both variables were strongest among African Americans (Any college vs. Less than high school – adjusted Odds Ratio [aOR] = 0.23, 95% Confidence Interval [95% CI] = 0.08, 0.70; Ever unemployed vs. Never unemployed in the past year – aOR = 5.32, 95% CI = 1.94, 14.60). Health insurance status was significantly associated with treatment in a jail or prison only among Whites (Private vs. No insurance – aOR = 0.37, 95% CI = 0.19, 0.69). Co-occurring mental health diagnosis was significant only among African Americans (Any mental health diagnosis vs. none – aOR = 3.91, 95% CI = 1.38, 11.09). Employment and health insurance status were significant only among men (aOR = 2.18, 95% CI = 1.26, 3.77; aOR = 0.39, 95% CI = 0.22, 0.70, respectively). Conclusion We identified modifying roles for race/ethnicity and gender in the relationship between several factors and treatment utilization in a jail or prison versus non-correctional treatment settings. More numerous factors and stronger effect sizes were identified among African Americans and men in particular. Health promotion interventions promoting the uptake of substance abuse treatment should tailor services to align with the needs of those with the highest risk for incarceration

Do hand preferences predict stacking skill during infancy?

The cascade theory of handedness suggests that hand preferences develop from a history of cascading and sequentially developing manual asymmetries for a variety of actions. Infants who consistently use their preferred hand for a variety of actions likely would gain proficiency using that preferred hand and, consequently, perform more proficiently on other challenging manual tasks. One such task is object stacking, which has been linked with a number of cognitive abilities. If infant hand preference facilitates the development of stacking skill, then this could provide a link by which early hand preference might affect the development of cognition. From a sample of 380 infants assessed for an acquisition hand preference across 6-14 months, 131 infants were assessed for stacking skill from 10 to 14 months at monthly visits. Four unique handedness sub-groups were identified from the 380-infant sample: left, trending right, stable right, or no hand preference. Each of the four hand preference groups exhibited different trajectories in the development of their stacking skills. Left- and stable right-handers stacked more items than infants with no preference by 14 months, whereas infants with a trending right preference did not. The proportion of preferred hand use (right and left) from 6 to 9 months also predicted an earlier initial onset of stacking skill, whereas the proportion of only right hand use did not. Thus, the development of a hand preference predicts an earlier emergence of stacking skill and may have implications for other domains of infant cognitive development

Proteomic analyses identify differences between bovine epididymal and ejaculated spermatozoa that contribute to longevity

Sperm are stored for extended periods of time in the epididymis, but upon ejaculation motility is increased and lifespan is decreased. The objective of this study was to identify differences in proteins between epididymis and ejaculated samples that are associated with longevity. Ejaculated semen was collected from mature Angus bulls (n = 9); bulls were slaughtered and epididymal semen was collected. Epididymal and ejaculated semen were centrifuged to separate sperm and fluid. Fluids were removed and sperm pellets were resuspended in a high ionic solution and vortexed to remove loosely attached proteins. Sperm samples were centrifuged, and the supernatant was removed; both fluid and sperm samples were snap frozen in liquid nitrogen and stored at -80 oC. Protein analysis was performed by LCMS/MS. A different group of yearling Angus cross bulls (n = 40) were used for sperm cultures. Ejaculated (n = 20) and epididymal (n = 20) semen were diluted and cultured in a commercial media at pH 5.8, 6.8 and 7.3, at 4 oC. Sperm were evaluated for motility and viability every 24 h until motility was lower than 20%. There was an effect of pH, time and pH by time interaction for motility and viability for both ejaculated and epididymal sperm (P ≤ 0.05). At 216 h of incubation epididymal sperm at pH 7.3 and ejaculated sperm at pH 6.8 reached motility below 20%. A total of 458 unique proteins were identified; 178, 298, 311, and 344 proteins were identified in ejaculated fluid, ejaculated sperm, epididymal fluid and epididymal sperm, respectively. There were 8, 24, 10, and 18 significant KEGG pathways (FDR \u3c0.05) for ejaculated fluid, epididymal fluid, ejaculated sperm, and epididymal sperm, respectively. The metabolic pathway was identified as the most important KEGG pathway; glycolysis/gluconeogenesis, pentose phosphate, and glutathione metabolism pathways were significant among proteins only present in epididymal samples within the metabolic pathway. Other proteins identified that may be related to epididymal sperm\u27s increased longevity were peroxidases and glutathione peroxidases for their antioxidant properties. In summary, energy metabolism in the epididymis appears to be more glycolytic compared to ejaculated and epididymis sperm have a larger number of antioxidants available which may be helping to maintain sperm in a quiescent state. Epididymal sperm remained viable (membrane integrity) longer than ejaculated sperm when cultured at the same pH