Search results for "fori"
showing 10 items of 142 documents
Host filtering, not competitive exclusion, may be the main driver of arbuscular mycorrhizal fungal community assembly under high phosphorus
2023
A major goal in ecology is understanding the factors which determine the diversity and distribution of organisms. The outcome of the symbiotic relationship between plants and arbuscular mycorrhizal (AM) fungi is strongly influenced by soil phosphorus (P) availability. Despite this knowledge, there is still much to uncover about how soil P status can shape the taxonomic and phylogenetic assembly of root-colonising AM fungi. Additionally, there is a paucity of understanding about the implications of these changes for the outcome of the AM symbiosis in terms of plant growth, nutrient status and defence traits. We conducted a factorial pot experiment where sorghum (Sorghum bicolor) was grown un…
Modelling phytoplankton in boreal lakes
2014
Ekonomiskās krīzes metaforika Spānijas un Latvijas presē. Salīdzinošā analīze
2015
Maģistra darbs "Ekonomiskās krīzes metaforika Spānijas un Latvijas presē. Salīdzinošā analīze" ir veltīts konceptuālās metaforas fenomenam politiskajā diskursā ekonomiskās krīzes kontekstā. Darba mērķis ir izpētīt, vai Latvijas un Spānijas presē ir novērojamas līdzīgas tendences metaforas lietojumā, atspoguļojot neseno (2008-2013) ekonomisko krīzi abās valstīs, un kas ir kopīgs abiem avotiem. Pielietojot Leikofa (Lakoff) un Džonsona (Johnson) (1980) konceptuālās metaforas teoriju, empīriska pētījuma rezultātā tika konstatēts, ka Spānijas un Latvijas prese vairāk kā 90% gadījumu, izmantojušas vienas un tās pašas konceptuālās metaforas, no kurām lielākā daļa ir strukturālas, vispārpieņemtas, …
Tēla un formas aspekti metaforisko izteiksmju tulkošanā no angļu uz krievu valodu daiļliteratūrā: gadījuma izpēte
2016
Šī bakalaura darba mērķis ir izpētīt un aprakstīt metaforisko izteiksmju tulkošanas tendences virzienā no angļu uz krievu valodu. Lingvistiskās formas aspekts tika izskatīts atsevišķi no tēla. Stīvena Kinga romāna (Tumšais tornis 1: Strēlnieks, 1997) un tā divu tulkojumu salīdzinošā analīze ļāva izveidot korpusu kvantitatīvai analīzei. Izteiksmes izrādīja tendenci uz formas saglabāšanu tulkojumos, tēli tika atveidoti galvenokārt ar to pašu tēlu; cits tēls un skaidrojošais tulkojums sekoja pēc popularitātes. Salīdzinājumus saturošas izteiksmes visvairāk saglabāja gan formu, gan tēlu; epitetus saturošas tika skaidrotas visbiežāk. Dažu piemēru analīze izrādīja, ka tēla saglabāšana var tikt tra…
Haptotropism in a Nickel Complex with a Neutral, π‐Bridging cyclo‐P4 Ligand Analogous to Cyclobutadiene
2022
The reaction of ( 1 )Ni(η 2 -cod), 2 , incorporating a chelating bis( N -heterocyclic carbene) 1 , with P 4 in pentane yielded the dinuclear complex [( 2 )Ni] 2 (μ 2 ,η 2 :η 2 -P 4 ), 3 , formally featuring a cyclobutadiene-like, neutral, rectangular, π-bridging P 4 -ring. In toluene, the butterfly-shaped complex [( 1 )Ni] 2 (μ 2 ,η 2 :η 2 -P 2 ), 4 , with a formally neutral P 2 -unit was obtained from 2 and either P 4 or 3 . Computational studies showed that a low energy barrier haptotropic rearrangement involving two isomers of the μ 2 ,η 2 :η 2 -P 4 coordination mode and a low energy μ 2 ,η 4 :η 4 -P 4 coordination mode, as previously predicted for related nickel cyclobutadiene complexes…
pentoxifylline inhibits vgamma9/vdelta2 t lymphocyte activation of patients with active behçet's disease
2007
The aim ofthis study is to evaluate the in vitro effect ofpentoxifylline (PTX) on T Vy9No21ymphocyte function in Beheet's disease (DO). We investigated the effect of PTX on Vy9No2 T cell expansion and expression of TNFRII receptor and perforin content before and after PTX addition by means of FACS analysis lymphocyte cultures from patients with active and inactive DO and healthy subjects. The addition of PTX at a concentration of 1 mg/ml determined a significant inhibition of cell expansion, a down regulation of TNF receptor expression and inhibited the PMA-induced degranulation of perforin. Taken together these data indicate that PTX is capable of interfering with Vy9No2 T cell function in…
Strain effects in phosphorus bound exciton transitions in silicon
2023
Donor spin states in silicon are a promising candidate for quantum information processing. One possible donor spin readout mechanism is the bound exciton transition that can be excited optically and creates an electrical signal when it decays. This transition has been extensively studied in bulk, but in order to scale towards localized spin readout, microfabricated structures are needed for detection. As these electrodes will inevitably cause strain in the silicon lattice, it will be crucial to understand how strain affects the exciton transitions. Here we study the phosphorous donor bound exciton transitions in silicon using hybrid electro-optical readout with microfabricated electrodes. W…
Removal of silicon from CFB-derived fly ash leachate in the context of phosphorus recovery
2018
High concentrations of dissolved silica in the acid leachate impose two major challenges on precipitation based recovery of phosphorus (P). Firstly, co-precipitation of colloidal silica in the acidic regimes decreases the purity and value of precipitated P-products. In addition, silica scaling on internal surfaces of equipment is also a problematic issue in industrial operations. Therefore, removal of dissolved silica prior to P-recovery process minimizes the risks of Si-contamination in P-products and Si-scaling. In the present study, silica removal was achieved by accelerated silica polymerization with higher acidity and ionic strength of mineral acid, which also assisted the leaching of …
Simultaneous measurement of β-delayed proton and γ decay of 27P
2016
This is the first study of 27P to measure both the β-delayed proton and β-delayed γ decays. While no new proton groups in the astrophysically interesting energy region of 300–400 keV were observed, a new upper limit on the proton branching of 0.16% was estimated. Several new γ -ray lines were observed, mainly coming from the isobaric analog state in 27Si, which has been assigned a more accurate energy value of 6638(1) keV. peerReviewed
Turve- ja metsätalouden vaikutukset kahden metsäjärven ekosysteemiin : paleolimnologinen piileväanalyysi
2015
Tässä tutkielmassa selvitettiin turvetuotannon ja muun maankäytön aiheuttamia ekosysteemimuutoksia kahdessa keskisuomalaisessa metsäjärvessä, Martinjärvessä ja Iso Kivijärvessä. Tutkimus perustui paleolimnologiseen piileväanalyysiin, joka kattoi aikajakson 1600-luvulta nykypäivään. Martinjärven valuma-alueella on turvetuotantoa, mutta vertailujärvenä toimineella Iso Kivijärven valuma-alueella sitä ei ole. Järvien ominaisuudet ovat paljolti samankaltaisia, molemmat ovat matalia, pieniä humusjärviä. Martinjärvellä piilevien monimuotoisuudessa oli suurempaa luonnollista vaihtelua kuin Iso Kivijärvellä. Iso Kivijärvellä monimuotoisuus ja lajimäärät ovat olleet laskussa 1900-luvun ajan aiempiin …