Influence of ligand structure and molecular geometry on the properties of d6 polypyridinic transition metal complexes

Different strategies to improve the excited state properties of polypyridinic complexes by varying ligand structure and molecular geometry are described. Bidentate and tetradentate ligands based on fragments as dipyrido[3,2-a:2′,3′-c]phenazine, dppz, and pyrazino[2,3-f][1,10]-phenanthroline, ppl, have been used. Quinonic residues were fused to these basic units to improve acceptor properties. Photophysical studies were performed in order to test theoretical predictions

Basin scale sources of siltation in a contaminated hydropower reservoir

Siltation and the loss of hydropower reservoir capacity is a global challenge with a predicted 26 % loss of storage at the global scale by 2050. Like in many other Latin American contexts, soil erosion constitutes one of the most significant water pollution problems in Chile with serious siltation consequences downstream. Identifying the sources and drivers affecting hydropower siltation and water pollution is a critical need to inform adaptation and mitigation strategies especially in the context of changing climate regimes e.g. rainfall patterns. We investigated, at basin scale, the main sources of sediments delivered to one of the largest hydropower reservoirs in South America using a spatio-temporal geochemical fingerprinting approach. Mining activities contributed equivalent to 9 % of total recent sediment deposited in the hydropower lake with notable concentrations of sediment-associated pollutants e.g. Cu and Mo in bed sediment between the mine tributary and the reservoir sediment column. Agricultural sources represented ca. 60 % of sediment input wherein livestock production and agriculture promoted the input of phosphorus to the lake. Evaluation of the lake sediment column against the tributary network showed that the tributary associated with both dominant anthropogenic activities (mining and agriculture) contributed substantially more sediment, but sources varied through time: mining activities have reduced in proportional contribution since dam construction and proportional inputs from agriculture have increased in recent years, mainly promoted by recent conversion of steep lands from native vegetation to agriculture. Siltation of major hydropower basins presents a global challenge exemplified by the Rapel basin. The specific challenges faced here highlight the urgent need for co-design of evidence-led, context-specific solutions that address the interplay of drivers both within and without the basin and its communities, enhancing the social acceptability of sediment management strategies to support the sustainability of clean, hydropower energy production

Gamification in Health Care Management: Systematic Review of the Literature and Research Agenda

This research aims to advance the understanding of gamification in health care management using a systematic review of the literature through a multiphase analysis. To do so, first, we extract the relevant bibliographic data for our research according to a methodology of data generation structured in six stages and a descriptive analysis oriented to the technical characterization of the data. Then, we codify all the information, identify the main attributes with the collaboration of two independent experts and check their validity using the evaluation of two focus groups of professionals in gamification and health care management. We found seven attributes: (1) health care users, (2) psychology, (3) behavior, (4) activities, (5) health field, (6) technology, and (7) gamification elements. Within each of these seven attributes, there are a series of main elements that are detailed in the following for each of them. (1) Health care users: their age and the role they play in the health system. (2) Psychology: cognition, positive and negative emotions. (3) Behavior: healthy behavior encouragement, such as compliance, collaboration and responsibility. (4) Activities: physical activity and food. (5) Health field: preventive medicine and chronic diseases. (6) Technology: cell phones. (7) Gamification elements: different elements, but the number of articles in which these elements and their interactions are studied in depth is limited. Our results point toward a promising present and future research agenda that is in parallel with the development of relevant fields for the sector, such as chronic diseases, health education and preventive medicine

On a celluloid platter An analysis of the representations and functions of food and eating in the cinema

SIGLEAvailable from British Library Document Supply Centre-DSC:DXN016219 / BLDSC - British Library Document Supply CentreGBUnited Kingdo