1. Arbuscular mycorrhizal fungi alter Hg root uptake and ligand environment as studied by X-ray absorption fine structureAlojz Kodre, Iztok Arčon, Marta Debeljak, Mateja Potisek, Matevž Likar, Katarina Vogel-Mikuš, 2017, original scientific article Abstract: Mercury (Hg) – plant – fungal interactions are only poorly studied. Hg speciation and ligand environment
in maize roots inoculated with arbuscular mycorrhizal (AM) fungi were investigated in order to better
understand the role of AM in Hg soil to root transfer.
The maize plants were grown in Hg polluted substrate (50 mg g1 as dissolved HgCl2) and inoculated
with AM fungi originating from: a) highly Hg polluted environment of a former Hg smelting site in Idrija,
Slovenia, (Glomus sp. – sample AmI), and b) non-polluted environment (commercial AM inoculum
Symbivit1 – sample AmC). Hg speciation and ligand environment in maize roots was studied by Hg-L3
XANES and EXAFS with emphasis on XAS methodology – modelling and fitting the XAFS spectra to extract in a reliable way as much information on Hg coordination as possible. The AmI plants developed more arbuscules and less vesicles than the AmC plants, and also
accumulated more Hg in the roots. A clear difference in Hg coordination between the AM (AmC & AmI)
and the control (ConC & ConI) plants is recognized in Hg L3-edge EXAFS analysis: in the ConC & ConI
maize roots 73–80% of Hg is attached between two sulphur atoms at the distance of 2.34 Å. The remaining
ligand is nitrogen at 2.04 Å. In AmI & AmC roots another Hg-S attachment encompassing four thiol groups
at the S-distance of 2.50 Å are identified, accounting for 21–26%. AM fungi can modify Hg ligand environment in plant roots, thus playing an important role in biogeochemical cycling of Hg in terrestrial
ecosystems.
Found in: ključnih besedah
Summary of found: ...reliable way as much information on Hg coordination as possible. The AmI plants developed more...
Keywords: EXAFS
XANES
Arbuscular mycorrhiza
Phytoremediation
Toxicity
Hg coordination
Ligand environment
Published: 27.09.2016; Views: 4395; Downloads: 0
 Fulltext (1,82 MB) |
2. Distributed agreement in participial sandwiched configurationsAndrew Nevins, Franc Marušič, 2020, independent scientific component part or a chapter in a monograph Abstract: In recent years, several proposals have appeared that try to model the patterns
of agreement with coordinate noun phrases found in South Slavic Languages. We
investigate agreement in so-called sandwiched configurations, whereby a coordinated noun phrase sits between two agreeing participles. In such cases, the two
participles do not necessarily agree with each other, given a scenario in which the
first and the second conjunct have different phi-features. This means the two participles choose their target of agreement independently. We argue the results of our
experimental study favor an approach to agreement that places it partially in PF.
Found in: ključnih besedah
Summary of found: ...Syntax, Agreement, Coordination, sandwiched agreement...
Keywords: Syntax, Agreement, Coordination, sandwiched agreement
Published: 26.02.2020; Views: 1548; Downloads: 71
Fulltext (427,78 KB) |
3. In-situ Fe K-edge XAS analysis of ionic species in the highly-concentrated FeCl2 aqueous solutions for Power-to-Solid energy storage technologyMatjaž Valant, Iztok Arčon, Uroš Luin, unpublished conference contribution Found in: ključnih besedah
Summary of found: ...XAS, highly-concentrated FeCl2 aqueous solutions, local structure, coordination number, Power-to-Solid, energy storage technology...
Keywords: In situ Fe K-edge XAS, highly-concentrated FeCl2 aqueous solutions, local structure, coordination number, Power-to-Solid, energy storage technology
Published: 28.01.2021; Views: 1172; Downloads: 34
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