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5. Effective microorganisms technology applied to sewage sludge and tested in short exposure on Lepidium sativumTanja Buh, Leja Goljat, Darian Rampih, Petra Makorič, Sara Pignattelli, 2024, original scientific article Abstract: Sewage sludge has fertilizer properties and can supply a large amount of necessary nutrients to the crops, because it is full of
organic matter, carbon, nitrogen and other nutrients, but on the other hand, it also contains a lot of toxic compounds, derived
from its origin, such as heavy metals, antibiotics and microplastics. Effective microorganisms are a collection of naturally
occurring beneficial microorganisms that are able to coexist and are commonly used in agriculture and gardening to improve
plant performance and production. In this study, increasing concentrations of sewage sludge alone and added with effective
microorganisms were evaluated in a short exposure on Lepidium sativum L. Parameters that were evaluated are: (i) percentage
inhibition of germination, (ii) root length, (iii) biomass, (iv) soil pH, (v) total organic carbon and nitrogen both at soil and
at root level. Results carried out from our experiment highlighted that effective microorganisms when coupled with sludge
are able to restore biometric parameters by resetting seeds germinability inhibition and improving root elongation more than
50% when compared with plants added only with sludge, restoring the values almost of those to the control plants, as well
as for soil pH values. Total organic carbon and total nitrogen are boosted at soil level almost at 50% when compared with
the same concentrations added only with sludge, while at root level they appear decreased only in plants directly added with
sludge treated with effective microorganisms
Keywords: sewage sludge, effective microorganism, total organic carbon, total nitrogen, germinability, short plants exposure, acute toxicity, biomass, pH
Published in RUNG: 12.04.2024; Views: 165; Downloads: 0
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10. Air-water interface-assisted synthesis and charge transport characterization of quasi-2d polyacetylene films with enhanced electron mobility via ring-opening polymerization of pyrroleKejun Liu, Nadiia Pastukhova, Egon Pavlica, Gvido Bratina, Xinliang Feng, 2024, other component parts Abstract: Water surfaces catalyze some organic reactions more effectively, making them unique for 2D organic material synthesis. This report introduces a new synthesis method via surfactant-monolayer-assisted interfacial synthesis on water surfaces for ring-opening polymerization of pyrrole, producing distinct polypyrrole derivatives with polyacetylene backbones and ionic substitutions. The synthesis result in quasi 2D polyacetylene (q2DPA) film with enhanced charge transport behavior. We employed time-of-flight photoconductivity (TOFP) measurements using pulsed laser light of tunable wavelength for photoexcitation of the charge carriers within the q2DPA film. The charge transport was measured in the lateral direction as a function of external bias voltage ranging from 0 V to 200 V. We observed high electron mobility ({\mu}) of q2DPA reaching values of 375 cm2 V-1 s-1 at bias voltage Vb = -20V and photon energy of 3.8 eV.
Keywords: air-water interface-assisted synthesis, time-of-flight photoconductivity, 2D polymers, quasi 2D polyacetylene, q2DPA
Published in RUNG: 09.04.2024; Views: 184; Downloads: 2
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