Search results for "HD"
showing 10 items of 4547 documents
A preliminary study on the ecotoxic potency of wastewater treatment plant sludge combining passive sampling and bioassays.
2021
Highlights • The passive samplers collected bioavail able and bioaccessible chemicals from the WWTP sludge samples. • The sampler extracts were acutely and chronically toxic to water flea. • The sampler extracts were cytotoxic and genotoxic. • The sludge treatment such as composting and digesting diminished the toxicity. • Effect-based methods should be part of the risk assessment of sludge recycling. Sewage sludge is an inevitable byproduct produced in wastewater treatment. Reusing nutrient-rich sludge will diminish the amount of waste ending in soil dumping areas and will promote circular economy. However, during sewage treatment process, several potentially harmful organic chemicals are …
The impact of TiO2 modifications on the effectiveness of photocatalytic processes [review]
2018
This paper outlines the recent studies on the application of photocatalysis using semiconductors, with modified titanium dioxide (TiO2) in the process of reducing chemical contamination of surface and ground waters. During the last forty years, an increasing interest in catalysts of this type is noticeable. Hence, a wide range of methods of TiO2 modifications have been proposed so far by using its various polymorphs, composites with metals and non-metals and polymer-coatings or impregnating it with dyes that effectively absorb sunlight.
Iron-based metal-organic framework: Synthesis, structure and current technologies for water reclamation with deep insight into framework integrity.
2021
Water is a supreme requirement for the existence of life, the contamination from the point and non-point sources are creating a great threat to the water ecosystem. Advance tools and techniques are required to restore the water quality and metal-organic framework (MOFs) with a tunable porous structure, striking physical and chemical properties are an excellent candidate for it. Fe-based MOFs, which developed rapidly in recent years, are foreseen as most promising to overcome the disadvantages of traditional water depolluting practices. Fe-MOFs with low toxicity and preferable stability possess excellent performance potential for almost all water remedying techniques in contrast to other MOF…
Space Thermoacoustic Radioisotopic Power System, SpaceTRIPS: The Magnetohydrodynamic Generator
2021
Electricity production is a major problem for deep space exploration. The possibility of using radioisotope elements with a very long life as an energy source was investigated in the framework of an EU project “SpaceTRIPS”. For this, a two-stage system was tested, the first in which thermal energy is converted into mechanical energy by means of a thermoacoustic process, and the second where mechanical energy is converted into electrical energy by means of a magnetohydrodynamic generator (MHD). The aim of the present study is to develop an analytical model of the MHD generator. A one-dimensional model is developed and presented that allows us to evaluate the behavior of the device as regards…
Investigating the role of environmental taxes and regulations for renewable energy consumption: evidence from developed economies
2021
The current study aims to explore the role of environmental taxes and regulations for the renewable energy consumption, focusing on reporting policy suggestions to overcome climate change issues and achieve environmental sustainability. The main objective of this paper is to examine the relation between renewable energy, environmental taxes, environmental technologies, and environmental regulations in 29 OECD countries during 1996–2018. More precisely, we inspect the impact of the environmental regulations and environmental technologies on the renewable energy consumption. The authors employ CIPS and CADF unit root tests, panel Westerlund co-integration test, FMOLS, and Quantile regression …
Leisure time physical activity is associated with improved HDL functionality in high cardiovascular risk individuals: a cohort study.
2020
Abstract Aims Physical activity has consistently been shown to improve cardiovascular health and high-density lipoprotein-cholesterol levels. However, only small and heterogeneous studies have investigated the effect of exercise on high-density lipoprotein functions. Our aim is to evaluate, in the largest observational study to date, the association between leisure time physical activity and a range of high-density lipoprotein functional traits. Methods The study sample consisted of 296 Spanish adults at high cardiovascular risk. Usual leisure time physical activity and eight measures of high-density lipoprotein functionality were averaged over two measurements, one year apart. Multivariabl…
"Itsellä ei ole halua ryhtyä miksikään pikkupoliisiksi" : tutkimus lähisuhdeväkivallan puheeksi ottamisesta
2016
Tutkimuksen tavoitteena on pyrkiä ymmärtämään lähisuhdeväkivaltaan liittyviä haasteita ammattilaisten näkökulmasta. Tutkimukseni kohdistuu siihen, minkälaisia esteitä lähisuhdeväkivaltaa työssään kohdanneet ammattilaiset kertovat liittyvän lähisuhdeväkivalta-aiheen puheeksi ottamiseen. Tutkimuksessani selvitin puheeksi ottamisen vaikeutta ja etsin ammattilaisten tapoja selittää tätä. Valitsemaani aihetta perustelen sillä, että tätä näkökulmaa ei ole mielestäni riittävästi aiemmin tutkittu. Tutkimus on aihepiiriltään ajankohtainen ja yhteiskunnallisesti merkittävä, sillä Euroopan unionin perusoikeusviraston (European Union Agency for Fundamental Rights, FRA) raportissa vuodelta 2014 todetaan…
Kuvia metsäkansan luontosuhteista
2021
Olin jo vuosia kerännyt satunnaisesti metsistä löytämiäni roskia. Syyskuussa 2019 aloin kantaa päivittäisillä retkillä mukanani pusseja ja kerätä roskia järjestelmällisesti. Pussit täyttyivät nopeasti tupakantumpeista, käärepapereista, juomatölkeistä, shampoopulloista, miesten boksereista sekä kaikesta muusta ilmeisestä ja yllättävästä.
What’s in a name : the effect of category labels on teachers’ beliefs.
2019
In this paper, we report an investigation of the possible influence on teachers’ essentialist thinking and efficacy beliefs of category labels used to describe children’s educational difficulties. A 2x2x2 counterbalanced design was employed in which primary school teachers in Finland and the UK were exposed to vignettes that portrayed a child exhibiting difficulties in one of two domains: either behaviour or reading. Vignettes were presented in two versions. In one, the child was labelled as having either ‘ADHD’ or ‘Dyslexia’; in the alternate condition, no such label was ascribed, descriptions were identical in all other respects. Participating teachers were presented with two vignettes, o…
Who cares? Evidence on informal and formal home care use in Estonia
2019
Despite increasing attention to long-term care (LTC) and related challenges in the Estonian social policy agenda, the distributional fairness of LTC services in the country has received very limited attention. Using SHARE data, we address informal and formal home care services and identify the socio-economic factors that drive or hinder their use among the Estonian elderly. The relationship between informal and formal home care utilization is estimated applying the new approach to instrumental variable method proposed by Lewbel [2012. Using heteroscedasticity to identify and estimate mismeasured and endogenous regressor models. Journal of Business and Economic Statistics, 30(1), 67–80]. We …