Search results for "fori"

Fiksācijas disparitātes izmaiņas relaksējošo redzes vingrinājumu ietekmē

2022

Bakalaura darbs ir uzrakstīts latviešu valodā uz 29 lapaspusēm. Tas satur 9 attēlus, 3 tabulas un 36 atsauces uz literatūras avotiem. Bakalaura darba mērķis bija novērtēt relaksējošo redzes vingrinājumu ietekmi uz fiksācijas disparitāti. Pētījumā piedalījās 24 dalībnieki (vidējais vecums 23 ± 2 gadi). Mērījumu veikšanai subjektīvā fiksācijas disparitāte tika novērtēta 40 cm attālumā ar OLED sistēmu, kas izveidota IfADo (Dortmunde, Vācija). Rezultāti parāda, ka netika konstatētas būtiskas izmaiņas fiksācijas disparitātes mērījumos pēc relaksējošiem redzes vingrinājumiem, kā arī fiksācijas disparitātei nav būtiskas saistības ar dalībnieka sūdzību biežuma koeficientu un klīniskiem parametriem.…

Density-functional tight-binding modeling of electromechanics of phosphorene

2018

Single-layer black phosphorus or phosphorene is a two-dimensional material made from a puckered honeycomb structure. It is a semiconductor with a tunable band gap and both its mechanical and electronic properties are highly asymmetric because of the puckering. Recently there has been numerous computational studies and some experimental works trying to bring deeper understanding about this relatively new 2D material. In this study we simulate phosphorene using computationally low-cost density functional tight-binding (DFTB) method to see how stretching, shearing and bending affect its electronic properties. The band structure analysis shows that there is a relation between shearing and bendi…

Degradazione di pesticidi organofosforici in matrici ambientali

2008

Matrici quali acqua, suolo ed aria sono costantemente soggette a forti pressioni antropiche. I pesticidi pur avendo apportato grandi benefici alle attività agricole influiscono negativamente sugli equilibri degli ecosistemi. Circa 85-90% dei principi attivi applicati in agricoltura non raggiunge gli organismi a cui sono destinati, ma viene disperso nell’ambiente. In tale contesto l’individuazione di microrganismi deputati alla loro degradazione diventa un importante mezzo per la salvaguardia ambientale e della salute umana. Lo scopo del presente lavoro è stato quello di isolare batteri del suolo capaci di degradare composti organofosforici, i quali rivestono una notevole importanza nelle pr…

RAVITA Technology : new innovation for combined phosphorus and nitrogen recovery

2018

Abstract Present phosphorus (P) recovery technologies mainly contain P recovery from sludge liquor or ash. These types of technologies are suitable for large wastewater treatment plants (WWTPs) with enhanced biological phosphorus removal (EBPR), digestion and/or incineration. In Finland and other Nordic countries, strict P discharge limits require chemical precipitation, thus EBPR alone is not sufficient. Ammonium recovery from wastewater, on the other hand, is not so often discussed. However, recovery from WWTP reject waters would decrease the energy demand of ammonium synthesis by Haber-Bosh technology and the energy demand of the WWTP's biological process. Helsinki Region Environmental S…

Alma Mater

2016

Temperature, phosphorus and species composition will all influence phytoplankton production and content of polyunsaturated fatty acids

2023

Temperature increases driven by climate change are expected to decrease the availability of polyunsaturated fatty acids in lakes worldwide. Nevertheless, a comprehensive understanding of the joint effects of lake trophic status, nutrient dynamics and warming on the availability of these biomolecules is lacking. Here, we conducted a laboratory experiment to study how warming (18–23°C) interacts with phosphorus (0.65–2.58 μM) to affect phytoplankton growth and their production of polyunsaturated fatty acids. We included 10 species belonging to the groups diatoms, golden algae, cyanobacteria, green algae, cryptophytes and dinoflagellates. Our results show that both temperature and phosphorus w…

Is there light after depth? Distribution of periphyton chlorophyll and productivity in lake littoral zones

2014

Periphyton and phytoplankton contribute to the base of lake food webs, and both groups of microalgae are influenced by resources and physical forcing. Spatial variation in light availability interacts with the physical dynamics of the water column to create predictable depth gradients in resources and disturbance that may differentially affect periphyton vs phytoplankton. We characterized the depth distribution of chlorophyll and productivity of periphyton on sediments (epipelon) and phytoplankton in the euphotic zones of 13 oligomesotrophic lakes that span a large size gradient (0.017–32,600 km2 ). Epipelic chlorophyll usually increased with depth in the epilimnion. Light was the primary d…

Personas tiesības uz identitāti - dzimuma maiņas aspekts

2022

Tiesības uz identitāti sevī iekļauj arī dzimuma identitāti, kas var sakrist vai nesakrist ar dzimumu, kas piešķirts ar dzimšanu. Bakalaura darba mērķis ir izpētīt Eiropas Savienības un Latvijas dzimuma maiņas tiesisko regulējumu, kā arī gadījumus, kad persona, lai iegūtu juridisku dzimuma atzīšanu saskarās ar priekšnoteikumiem, kas ietekmē tās esošo laulību un tiesības uz ģimenes veidošanu ar bērniem. Darbā tiks apskatīti arī dzimuma maiņas operāciju aizsākumi 20.gadsimtā, jo tas mudināja tiesiskā regulējuma rašanos, kurš vēljoprojām ir atšķirīgs un mainīgs katrā Eiropas Savienības dalībvalstī. Bakalaura darba rezultātā tika gūti secinājumi, kas skaidro dzimuma identitātes būtību un sabiedr…

Trauksmes un depresijas simptomu saistība ar dzimuma disforiju un uztverto sociālo atbalstu transvīriešu populācijā

2020

Šī pētījuma mērķis ir izpētīt kādas savstarpējās saistības pastāv starp depresijas un trauksmes simptomiem, uztverto sociālo atbalstu un dzimuma disforiju transvīriešu populācijā. Pētījuma dalībnieki ir pilngadīgie, angliski runājošie transvīrieši (N=81). Dalībnieki aizpildīja 3 aptaujas : Trauksmes, depresijas un stresa skala (Depression Anxiety & Stress Scales (DASS) Lovibond, S.H. & Lovibond, P.F., 1995), Dzimuma kongruences un apmierinātības ar dzīvi skala (The Gender Congruence and Life Satisfaction Scale (GCLS) Bethany A. et al., 2018) un uztvertā sociālā atbalsta skala (Zimet GD. et al., The Multidimensional Scale of Perceived Social Support (MSPSS)). Aptaujā tikai iekļauti arī demog…

Glyphosate-based herbicide use affects individual microbial taxa in strawberry endosphere but not the microbial community composition

2023

AbstractAimsIn a field study, the effects of treatments of glyphosate-based herbicides (GBHs) in soil, alone and in combination with phosphate fertilizer, were examined on the performance and endophytic microbiota of garden strawberry.Methods and resultsThe root and leaf endophytic microbiota of garden strawberries grown in GBH-treated and untreated soil, with and without phosphate fertilizer, were analyzed. Next, bioinformatics analysis on the type of 5-enolpyruvylshikimate-3-phosphate synthase enzyme was conducted to assess the potential sensitivity of strawberry-associated bacteria and fungi to glyphosate, and to compare the results with field observations. GBH treatments altered the abu…