Search results for " lead"
showing 10 items of 499 documents
Development, Characterization, and Testing of a SiC-Based Material for Flow Channel Inserts in High-Temperature DCLL Blankets
2018
This work has been carried out within the framework of the EUROfusion Consortium. The views and opinions expressed herein do not necessarily reflect those of the European Commission.
The response of cultured meiofaunal and benthic foraminiferal communities to lead exposure: Results from mesocosm experiments
2018
Lead (Pb) has been regarded as a very toxic element that poses a serious threat to biota. A mesocosm experiment is performed to assess the influence of Pb on meiofaunal (metazoans within 45-500 µm) and benthic foraminiferal (protozoans) communities. To this end, sediments bearing such communities are incubated in mesocosms, exposed to different levels of Pb in seawater, and monitored for up to eight weeks. Concentrations of Pb below 1 ppm in water do not promote a significant increase of this metal in sediments. Relatively high concentrations of Pb seem to affect meiofaunal and benthic foraminiferal communities by reducing their richness or diversity, and the abundance of the most sensitive…
Targeting Bacterial Sortase A with Covalent Inhibitors: 27 New Starting Points for Structure-Based Hit-to-Lead Optimization.
2019
Because of its essential role as a bacterial virulence factor, enzyme sortase A (SrtA) has become an attractive target for the development of new antivirulence drugs against Gram-positive infections. Here we describe 27 compounds identified as covalent inhibitors of
Exposure to Toxic Heavy Metals Can Influence Homocysteine Metabolism?
2019
Background: Homocysteine is a sulfur amino acid whose metabolism is activated in two pathways: remethylation to methionine, which requires folate and vitamin B12, and transsulfuration to cystathionine, which needs pyridoxal-5’-phosphate. High homocysteine level increases the risk of developing heart disease, stroke, peripheral vascular diseases, and cognitive impairment. Some evidence showed that exposure to these metals increased plasma homocysteine levels. Methods: A systematic review was carried out to clarify the relationship between homocysteine blood levels and exposure to toxic heavy metals (Lead, Cadmium, Mercury, and Chromium). Results: The results of this systematic review i…
Childhood Obesity: The Relationship Between Negative Emotionality, Emotion Regulation, and Parenting Styles
2019
Objectives We aimed to compare obese children and their non-obese counterpart on children’s negative emotionality, emotion regulation and maternal parenting styles and to examine the joint contribution of children’s temperament and maternal styles to children’s obesity. Methods A total of 200 mothers were involved in this study, 100 with children diagnosed with obesity (49 boys, 51 girls; the age ranged from 6 to 12 years), and 100 with children with a normal weight (49 boys, 51 girls; the age ranged from 6 to 12 years). Mothers completed self-report measures on children’s emotionality, emotion regulation, and parenting styles. Results The comparison between the two groups showed that obese…
Governing Complex Strategic Networks: Emergence Versus Enabling Effects
2017
In today’s knowledge-based economy, the sources of competitive advantage increasingly lie in webs of relationships between a variety of firms and organizations that, over time, lead to the emergence of strategic networks. As the performances of both the network actors and the whole network are strictly linked with the coordination and governance of network actors and their activities, this study aims to shed light on the ways in which the processes of network coordination and governance take place. Strategic networks are here viewed as complex adaptive systems, and the twin nature of the processes of strategic network coordination and governance is examined. On one hand, I underscore the em…
Leadership and church identity
2018
This article discusses how the theological-spiritual dimension, which has to do with the specific identity of the church, has implications for and partly determines the application of leadership theories and tools in the local church. The article also examines how leadership research can provide the means to realize a church’s theological or spiritual identity or its true nature. This implies a two-directional relationship between theology and leadership. On the one hand, theology should influence how churches are led, and on the other hand, leadership may facilitate the realization of the theological-spiritual dimension.
 There are a number of important articles on the theology of lea…
3D visualization of engendering collaborative leadership in the space
2012
The paper focuses on collaborative leadership in education and how to illustrate its engendering process in a three-dimensional space. This complex and fluid process is examined as distributed and pedagogical within a Finnish vocational upper secondary educational organization. As a consequence, the notion of distributed pedagogical leadership is used when collaborative leadership in education is studied. Collaborative leadership is argued to consist of the innermost substance of a professional learning community, as attributes of a group of people working together for specific purposes. Therefore, collaborative leadership naturally involves actors, activities, and context. However, the inn…
From job demands and resources to work engagement, burnout, life satisfaction, depressive symptoms, and occupational health
2016
This study investigated the cross-lagged associations between work engagement and burnout, and life satisfaction and depressive symptoms, their demands (i.e., workload) and resources (i.e., servant leadership, self-efficacy, resilience) and relationships with occupational health outcomes (i.e., recovery, number of mental health diagnoses, workaholism). This study is a part of an ongoing Occupational Health Study in which 1 415 employees (586 men, 829 women) were followed twice during two years 2011–12 through their occupational health services. The participants filled in a questionnaire on their work engagement, burnout symptoms, well-being, personal and work environmental resources and dem…
Transformational leadership development to reduce employee sickness absence: A randomized controlled trial
2022
Objetivo - Dado que muchas organizaciones se enfrentan a un aumento de las bajas por enfermedad entre sus empleados, se ha destacado en la literatura el potencial del liderazgo transformacional para mejorar la salud de los empleados y gestionar más eficazmente las bajas por enfermedad. Sin embargo, las pruebas empíricas existentes sobre esa asociación no son concluyentes y son ambiguas, ya que se basan en métodos de investigación no experimentales y en medidas de resultado subjetivas. Además, sigue sin estar claro si un líder transformacional puede realmente mejorar la salud de los empleados o más bien aumentar la motivación para asistir al trabajo. Además, hay un conocimiento limitado de l…