Search results for " Sam"
showing 10 items of 1096 documents
Evaluation of Superparamagnetic Silica Nanoparticles for Extraction of Triazines in Magnetic in-Tube Solid Phase Microextraction Coupled to Capillary…
2014
The use of magnetic nanomaterials for analytical applications has increased in the recent years. In particular, magnetic nanomaterials have shown great potential as adsorbent phase in several extraction procedures due to the significant advantages over the conventional methods. In the present work, the influence of magnetic forces over the extraction efficiency of triazines using superparamagnetic silica nanoparticles (NPs) in magnetic in tube solid phase microextraction (Magnetic-IT-SPME) coupled to CapLC has been evaluated. Atrazine, terbutylazine and simazine has been selected as target analytes. The superparamagnetic silica nanomaterial (SiO2-Fe3O4) deposited onto the surface of a capil…
Banku saistību līmeņa samazināšanās procesa ietekme uz Latvijas tautsaimniecību
2015
2008. gada globālā ekonomiskā krīze vēlreiz apliecināja finanšu sistēmas ciešo saistību ar reālo ekonomiku, tāpēc tiek izstrādāti Basel III banku regulējošie nosacījumi, kuri paredz bankām uzturēt zemāku saistību līmeni, kas savukārt ietekmēs valstu tautsaimniecības. Bakalaura darba mērķis ir analizēt Latvijas komercbanku saistību līmeņa samazināšanās ietekmi uz Latvijas tautsaimniecību, lai raksturotu Basel III regulu iespējamo makroekonomisko ietekmi un izvirzītu priekšlikumus attiecīgajām institūcijām ar nolūku uzlabot makroprudenciālo uzraudzības politiku, kā arī lai izvirzīt priekšlikumus tālākai temata pētniecībai. Banku saistības tiek novērtētas izmantojot Basel III regulējošo nosacī…
Pharmaceuticals in processing of municipal sewage sludge studied by grab and passive sampling
2018
Abstract Concentrations of pharmaceuticals, consisting of four anti-inflammatory and one antiepileptic drug, were studied in the aqueous and solid phase of municipal sewage sludge, collected from a wastewater treatment plant (WWTP) in central Finland. The samples included untreated municipal sludge from the biological wastewater treatment, digested sludge and sludge before and after composting. First, samples were taken as grab samples to study the bioavailable part in aqueous phase but also the part in solid fraction. Later, the long-term concentrations were studied by passive sampling with styrene divinylbenzene-reverse phase sulfonated (SDB-RPS) disks. In the untreated solid sludge, the …
Darba samaksas organizācija un tās pilnveidošanas iespējas uzņēmumā SIA “UNISPORTS”.
2019
Kvalifikācijas darba nosaukums ir “Darba samaksas organizācija un tās pilnveidošanas iespējas uzņēmumā SIA „UNISPORTS””. Kvalifikācijas darba autore ir Latvijas Universitātes Biznesa, vadības un ekonomikas fakultātes Vadībzinātnes nodaļas studiju programmas “Komercdarbības organizācija” 3. kursa studente. Kvalifikācijas darba mērķis ir aktualizēt darba samaksas organizācijas problēmas SIA „UNISPORTS” un, pamatojoties uz secinājumiem, izstrādāt priekšlikumus darba samaksas organizācijas pilnveidošanai. Pētījumā konstatēti esošās darba samaksas praktiskie jautājumi uzņēmumā SIA “UNISPORTS”, pamatojoties uz teorētisko bāzi un Latvijas Republikas tiesību aktiem. Autore pētījumā secinājusi, ka S…
Monitoring a meat-free pledge with smartphones:An experimental study
2020
Pledges are a popular strategy to encourage meat reduction, though experimental studies of their efficacy are lacking. Three-hundred and twenty-five participants from three different countries (UK, Germany, Australia) were randomly assigned to pledge 28 days meat-free or not, and their behavior was tracked via smartphones. Participants answered daily surveys regarding their eating behavior, meat cravings, and shared photos of their meals. Baseline data was collected prior to the pledge, after the 28 days, and one-month post-intervention. Participants assigned to the pledge condition ate less meat across the 28 days, compared to control participants. Meat reductions, observed at outtake, did…
The role of collective action for the emergence and consolidation of democracy
2020
AbstractThe role of citizens' collective action for the emergence and consolidation of democracy is generally analysed within bottom-up theories. However, top-down theories show that elites might impede or promote both democracy and collective action through a set of strategies which are often unobserved and vary over time. Democratic persistence and change require then to be assessed in a dynamic framework which considers both citizens and elites' strategies. For such reason, on a large sample of countries in the period 1971–2014, we jointly estimate the probability of collective action and democracy using a Structural Dynamic Model. This allows us to account for the dynamic nature of the …
Who can best report on children's motor competence: Parents, teachers, or the children themselves?
2018
Abstract Objective A positive perception of motor competence (MC) is important for children's health trajectory. It is purported that young children's perception is not well aligned with their actual ability. Alternative sources of perceptions are postulated from children's social context such as their parents or teachers. This study aims to analyse the associations among children's, parents' and Physical Education (PE) teachers' perception of children's MC and the children's actual MC, and whether these sources of information can report on children's actual MC. Design and method A convenience sample of 139 typically developed children (48.2% girls) from six schools participated in this cro…
School Adjustments in Children with Attention Deficit Hyperactivity Disorder (ADHD): Peer Relationships, the Quality of the Student-Teacher Relations…
2021
This study aimed to investigate how children with attention deficit hyperactivity disorder (ADHD) adjust to school when compared to typically developing students. The convenience sample consisted o...
Data from: Give me a sample of air and I will tell which species are found from your region – molecular identification of fungi from airborne spore s…
2018
Fungi are a megadiverse group of organisms, they play major roles in ecosystem functioning, and are important for human health, food production, and nature conservation. Our knowledge on fungal diversity and fungal ecology is however still very limited, in part because surveying and identifying fungi is time demanding and requires expert knowledge. We present a method that allows anyone to generate a list of fungal species likely to occur in a region of interest, with minimal effort and without requiring taxonomical expertise. The method consists of using a cyclone sampler to acquire fungal spores directly from the air to an Eppendorf tube, and applying DNA barcoding with probabilistic spec…
Flip-angle measurement by magnetization inversion: Calibration of magnetization nutation angle in hyperpolarized 3 He magnetic resonance imaging lung…
2010
The aim of this work was to establish a new, fast, and robust method of flip-angle calibration for magnetic resonance imaging of hyperpolarized 3He. The method called flip-angle measurement with magnetization inversion is based on acquiring images from periodically inverted longitudinal magnetization created using the spatial modulation of magnetization technique. By measuring the width of the area where the magnetization was inverted by the spatial modulation of magnetization preparation in phase images, the flip angle can be generated using a simple equation. To validate and establish the limits of the proposed method, flip-angle measurement with magnetization inversion acquisitions were …