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2. Synthesis and application of transition metal phosphide nanomaterials as electrocatalysts for water splitting and chemical transformations : dissertationTakwa Chouki, 2022, doctoral dissertation Abstract: In this thesis, we will focus on the solvothermal synthesis of iron phosphides (FeP, Fe2P) using triphenylphosphine (TPP) as an inexpensive and stable phosphorus source. The obtained iron phosphides were applied as electrocatalysts in hydrogen evolution reaction (HER), oxygen evolution reaction (OER), Rhodamine B (RhB) degradation, Escherichia coli (E. coli) inactivation,
nitrates reduction reaction (NO3RR) to ammonia (NH3), and as counter electrodes in dye-sensitized solar cells (DSSCs). Detailed characterizations of catalysts were carried out to investigate the correlations between the material structure and catalytic activity.
The first part of the thesis gives an introduction to the topic which cover overview of literature about the use of transition metal phosphide as efficient electrocatalysts in water splitting studies, NO3RR to NH3 and DSSCs.
The second part is a description of the experimental methods.
The third part discusses the solvothermal synthesis of FeP and Fe2P catalysts using TPP precursor. The phase conversion of iron phosphides at elevated temperatures under reductive atmosphere was reported. Structural characterizations of the obtained materials were achieved using multiple techniques. The electrocatalytic activities of heat-treated iron phosphide films for HER were studied in acidic environment.
The fourth part discusses the use of Fe2P nanoparticles (NPs) for OER.
The fifth part outlines the use of Fe2P precatalyst in water treatment studies. Using a thin film of Fe2P precatalyst, RhB degradation and E. coli inactivation in the presence of in-situ generated reactive chlorine species were reported. Characterization of Fe2P electrocatalysts before and after the test was carried out using different techniques.
The sixth part shows for the first time the use of FeP and Fe2P as a noble metal-free electrocatalysts for NO3RR to NH3. In this chapter we will emphasize the nitrate reaction pathways, which are highly complex and poorly understood.
The seventh part demonstrates the use of FeP and Fe2P catalysts as robust and efficient counter electrodes in DSSCs.
Keywords: solvothermal synthesis, iron phosphides, electrocatalysis, HER, OER, RhB degradation, E. coli inactivation, NO3RR to NH3, DSSCs, dissertations
Published in RUNG: 29.08.2022; Views: 1862; Downloads: 96
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3. Crystal structure of human PCNA in complex with three p15 peptidesMatteo De March, N. Merino, A. Gonzalez-Magana, M. Romano-Moreno, S. Onesti, Francisco J. Blanco-Silva, A. De Biasio, 2018, complete scientific database of research data Keywords: crystal structure, Homo sapiens, Escherichia coli
Published in RUNG: 17.03.2021; Views: 2500; Downloads: 9
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4. Structural basis of human clamp sliding on DNAMatteo De March, N. Merino, S. Barrera-Vilarmau, R. Crehuet, S. Onesti, Francisco J. Blanco-Silva, A. De Biasio, 2018, complete scientific database of research data Keywords: DNA binding protein, Homo sapiens, synthetic constructs, Escherichia coli
Published in RUNG: 17.03.2021; Views: 2422; Downloads: 10
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5. Modulation of PCNA sliding surface by p15PAF suggests a suppressive mechanism for cisplatin-induced DNA lesion bypass by pol eta holoenzymeMatteo De March, S. Barrera-Vilarmau, E. Mentegari, N. Merino, E. Bressan, G. Maga, R. Crehuet, S. Onesti, Francisco J. Blanco-Silva, A. De Biasio, 2012, complete scientific database of research data Keywords: DNA binding protein, Homo sapiens, Escherichia coli
Published in RUNG: 17.03.2021; Views: 2077; Downloads: 9
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9. Simultaneous ternary extension of DNA catalyzed by a trimeric replicase assembled in vivoAlejandro Montón Silva, Fabio Lapenta, Alessandra Stefan, Fabrizio Dal Piaz, Alessandro Ceccarelli, Alessandro Perrone, Alejandro Hochkoeppler, 2015, original scientific article Abstract: According to current models, dimeric DNA Polymerases coordinate the replication of DNA leading and lagging strands. However, it was recently shown that trimeric DNA Polymerases, assembled in vitro, replicate the lagging strand more efficiently than dimeric replicases. Here we show that the τ, α, ε, and θ subunits of Escherichia coli DNA Polymerase III can be assembled in vivo, yielding the trimeric τ3α3ε3θ3 complex. Further, we propose a molecular model of this complex, whose catalytic action was investigated using model DNA substrates. Our observations indicate that trimeric DNA replicases reduce the gap between leading and lagging strand synthesis.
Keywords: Trimeric DNA Polymerase, E. coli, DNA Polymerase III, τ3α3ε3θ3 complex, Triple DNA extension
Published in RUNG: 27.01.2021; Views: 1960; Downloads: 0
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10. Molecules involved in motility regulation in Escherichia coli cells: a reviewFazlurrahman Khan, Nazia Tabassum, Dung :Pham, Sandra Oloketuyi, Young-Mog Kim, 2020, original scientific article Abstract: The initial colonization of the host organism by commensal, probiotic, and pathogenic Escherichia coli strains is an important step in the development of infections and biofilms. Sensing and colonization of host cell surfaces are governed by flagellar and fimbriae/pili appendages, respectively. Biofilm formation confers great advantages on pathogenic E. coli cells such as protection against the host immune system, antimicrobial agents, and several environmental stress factors. The transition from planktonic to sessile physiological states involves several signaling cascades and factors responsible for the regulation of flagellar motility in E. coli cells. These regulatory factors have thus become important targets to control pathogenicity. Hence, attenuation of flagellar motility is considered a potential therapy against pathogenic E. coli. The present review describes signaling pathways and proteins involved in direct or indirect regulation of flagellar motility. Furthermore, application strategies for antimotility natural or synthetic compounds are discussed also.
Keywords: Biofilm formation, Escherichia coli, inhibition, motility, pathogenesis
Published in RUNG: 14.01.2021; Views: 3617; Downloads: 0
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