1,354,061 research outputs found
The biodegradation of aromatic compounds by a white-rot fungus and related applications
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Experimental investigation of the overcharge effects on commercial li-ion batteries with two different anode materials
No full textLithium-ion batteries are now a widespread technology in automotive applications. Together with the life of the batteries and their performance, safety plays a fundamental role in ensuring the spread of electromobility in our society. Overcharge is one of the most severe safety problems for the large-scale application of lithium-ion batteries. In this work the results of the overcharge tests performed on Lithium Ion cells with different anode materials are presented: A comparison was made between graphite-based anode Li-ion batteries and Lithium Titanate Oxide (LTO)-based anode Li-ion batteries. Experimental tests were performed with different current intensities: it was thus possible to analyze the effects of an overcharge as the current supplied varies. The graphite-based anode Li-Ion batteries are equipped with protection devices which act by blocking the passage of current in the cell and avoiding venting and/or explosion phenomena; on the other hand, LTObased anode Li-Ion Batteries, although considered intrinsically safer batteries, experienced thermal runaway during the overcharge tests. Increasing the overcharge current, the effects of the electrical abuse are more destructive. © 2021 Italian Association of Chemical Engineerin
Aqueous plant extracts as stimulators of laccase production in liquid cultures of Lentinus edodes
No full textTotal and specific activities of extra-cellular laccases from Lentinus
edodes were enhanced by adding corn straw and chestnut juice to the
liquid growth medium. The aqueous extracts were chemically characterized
and revealed the presence of several phenolic and non-phenolic
compounds. Extensive extraction of these components from the tested
extracts completely annulled their stimulating properties on laccase
production, suggesting that these compounds can act at micromole levels
Trattamento biologico del residuo solido proveniente dagli impianti di estrazione dell’olio di oliva a due fasi
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The biodegradation of recalcitrant effluents from an olive mill by a white-rot fungus
No full textBiodegradation of olive-mill wastewater (OMW) was performed by the
polyurethane-immobilized mycelium of Lentinula edodes. Throughout three
consecutive treatment cycles of the effluent significant abatements of
its polluting characteristics were observed. In fact, its contents in
total organic carbon, total phenols, total ortho-diphenol were
dramatically reduced. In addition, a significant effluent decolorization
was evident. (C) 1998 Elsevier Science B.V. All rights reserved
Studio sulla tutela della salute e della sicurezza dei lavoratori del settore trasporti.
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Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Characterization of immobilized laccase from Lentinula edodes and its use in olive mill wastewater treatment
No full textThis study is mainly concerned with the characterization of an immobilized laccase from the white-rot fungus Lentinula edodes for use in wastewater treatment. The enzyme was immobilized on chitosan by adsorption and subsequent cross-linking with glutaraldehyde. The immobilized laccase displayed a lower specific activity and a lower substrate affinity than the free enzyme. Nevertheless, the immobilized catalyst exhibited an appreciable catalytic capability (520 units g−1 support) along with remarkably improved stability properties to various parameters, such as temperature, pH and storage time. The treatment of olive mill wastewater with immobilized laccase led to a partial decolorization as well as to significant abatements in its content in polyphenols, ortho-diphenols combined with a decreased toxicity of the effluent
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