Search results for " environment"
showing 10 items of 19900 documents
Photocatalytic nano-composite architectural lime mortar for degradation of urban pollutants under solar and visible (interior) light
2017
Abstract Recent advances in nano-technology and nano-additives can give enhanced properties to natural hydraulic lime (NHL), creating a multifunctional material. We have prepared a novel nanocomposite, made of a commercial mortar with 1 wt% and 5 wt% added titania nanoparticles (NPs). These TiO 2 NPs are themselves doped with 1 mol% silver, to give the material enhanced photocatalytic and antimicrobial properties. The Ag-doped TiO 2 NPs were made from a simple, costs effective, aqueous green nanosynthesis process, and the end material only contains 0.01–0.05% Ag. As this mortar is intended to both combat atmospheric pollution, and create more durable/lower maintenance building facades (plas…
Analysis of the Potential of an Increase in Yeast Output Resulting from the Application of Additional Process Wastewater in the Evaporator Station
2019
This paper reports the results of an analysis of process wastewater streams in the context of an increase in yeast production. This research is based on the analysis of data from the biggest yeast factory in Europe. The research presented in this paper involves the analysis of the influence of direction of additional wastewater into the evaporator station on yeast production. In the process wastewater, nitrogen is mainly present in organic forms. The analysis reported in this paper involves the concentration of total nitrogen in wastewater streams, as it is the main parameter applied to determine the amount of wastewater that can be applied in agricultural fields. Directing additional waste…
Förståelighetsperspektiv på finlandssvenskars vanliga uttalsdrag i engelska
2022
The present investigation addresses the gravity of mispronunciation for the intelligibility of English spoken by L1 Finland-Swedish teenagers. Previous research on the topic has been scarce, and even though there is some knowledge about the typical pronunciation challenges faced by this learner group, there is hardly any empirical research on the extent to which the typical mispronunciations actually cause misunderstandings. To investigate this, speech samples were elicited from teenaged L1 Finland-Swedish learners of English, demonstrating typical mispronunciations. Then, an intelligibility test was arranged with L1 English listeners (n = 48) matching the speakers’ age. Results suggest tha…
Physical activity from adolescence to young adulthood: patterns of change, and their associations with activity domains and sedentary time
2021
Background Longitudinal studies demonstrate an average decline in physical activity (PA) from adolescence to young adulthood. However, while some subgroups of adolescents decrease activity, others increase or maintain high or low activity. Activity domains may differ between subgroups (exhibiting different PA patterns), and they offer valuable information for targeted health promotion. Hence, the aim of this study was to identify PA patterns from adolescence to young adulthood; also to explore the associations of (i) changes in PA domains and in sedentary time, (ii) sociodemographic factors, and (iii) self-rated health with diverging PA patterns. Methods The observational cohort study data …
Western Australian students' alcohol consumption and expenditure intentions for Schoolies.
2016
In Australia, the immediate post-school period (known as ‘Schoolies’) is associated with heavy drinking and high levels of alcohol-related harm. This study investigated students’ intended alcohol consumption during Schoolies to inform interventions to reduce alcohol-related harm among this group. An online survey was administered to students in their senior year of schooling. Included items related to intended daily alcohol consumption during Schoolies, amount of money intended to be spent on alcohol over the Schoolies period, and past drinking behaviour. On average, participants (n=187) anticipated that they would consume eight standard drinks per day, which is substantially higher than t…
Reflecting on Work Values with Young Unemployed Adults in Finland
2019
In this article, we explore the internal conversations about the work values of young unemployed adults in Finland. We draw on the theoretical concept of internal conversation by Margaret Archer in order to shift the focus from the individual work values to the interplay between subjective concerns and structural circumstances. The data consist of six group interviews conducted among 29 young unemployed adults. We argue that the internal conversations on work values of young unemployed adults constitute five significant concerns: self-realization and opportunity to contribute to society; sufficient income to live independently; social expectations; challenges of finding employment; and unsu…
"Me ollaan koko ajan liikkeessä" : tutkimus nuorten omaehtoisen liikkumisen muodoista ja merkityksistä tilan kehyksissä
2017
This study examines the meanings and prerequisites of self-organised physical activity from young people’s perspective. The theoretical framework is social space, which enables young people’s experiences to be interpreted in parallel with their physical, social, and cultural environment. Three research questions are addressed: (1) Where does young people’s self-organised physical activity take place? (2) What are the forms of the activity? (3) What meanings do young people associate with the spaces of the activity? The research data were collected within one municipality. The main data consist of 34 theme interviews with young people aged 12 to 16 years. The interviewees were selected mainl…
Long-term changes in pigmentation of arctic Daphnia provide potential for reconstructing aquatic UV exposure
2016
Abstract Despite the biologically damaging impacts of solar ultraviolet radiation (UV) in nature, little is known about its natural variability, forcing mechanisms, and long-term effects on ecosystems and organisms. Arctic zooplankton, for example the aquatic keystone genus Daphnia (Crustacea, Cladocera) responds to biologically damaging UV by utilizing photoprotective strategies, including pigmentation. We examined the preservation and content of UV-screening pigments in fossil Daphnia remains (ephippia) in two arctic lake sediment cores from Cornwallis Island (Lake R1), Canada, and Spitsbergen (Lake Fugledammen), Svalbard. The aims were to document changes in the degree of UV-protective p…
Phosphorus limitation enhances parasite impact: feedback effects at the population level
2014
Background Nutrient deficiency affects the growth and population dynamics of consumers. Endoparasites can be seen as consumers that drain carbon (C) or energy from their host while simultaneously competing for limiting resources such as phosphorus (P). Depending on the relative demands of the host and the parasite for the limiting nutrient, intensified resource competition under nutrient limitation can either reduce the parasite’s effect on the host or further reduce the fitness of the nutrient-limited host. So far, knowledge of how nutrient limitation affects parasite performance at the host population level and how this affects the host populations is limited. Results We followed the popu…
L'économie matérielle de la France (1830-2015). L'histoire d'un parasite ?
2018
This article explores the long-term dynamics of material use in France over a period of 185 years. It is based on material flow accounts that are perfectly consistent with the standards of Material Flows Analysis at the national economic scale. This work - which covers domestic extraction, imports and exports - is the first long-term study of material flows for France, with annual and national data for most of the period. Our database allows us to study the evolution of French metabolism during the industrialization of the country, together with the increasing dependence on abiotic materials. We highlight a singular metabolic trajectory: that of a state that benefits from successive world-s…