Browsing by Title
Now showing items 45553-45572 of 91744
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(Elsevier, 2020)Multifunctional chitosan/magnetite (CS/Fe3O4) and graphene/chitosan/magnetite (Gr/CS/Fe3O4) nanocomposites (NCs) were synthesized using a simple hydrothermal method. The NCs were subsequently evaluated as magnetic ...
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(MDPI, 2021)Water pollution by heavy metals has significant effects on aquatic ecosystems. Copper is one of the heavy metals that can cause environmental pollution and toxic effects in natural waters. This encourages the development ...
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(Royal Society of Chemistry, 2018)This work describes the design, synthesis and physicochemical properties of the highly emissive nanocomposite [bentonite][Eu{(η5-Cp*)Ru(η6-bzac)}3Phen]0.09[H2O]0.22 based on the Eu(III) complex [Eu{(η5-Cp*)Ru(η6-bzac)}3P ...
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(1994)Trypanosoma cruzi from 23 chronic and acute cases of Chagas disease were isolated and further characterized. They displayed a remarkable similarity, after typification by schizodeme analysis using restriction endonuclease ...
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(1991)The aerial parts of Senecio zoellneri afforded, in addition to known compounds, five oxygenated furoeremophilane derivatives and three seco-furoeremophilanolides, all of which are probably formed by oxidation of ...
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(1991)The aerial parts of Polyachyrus sphaerocephalus gave seven new eudesmane derivatives and a germacra-dien-diol while a reinvestigation of P. fuscus afforded a new caryophyllene, two nerolidolglycosides, a curcumene and two ...
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(1988)The aerial parts of Oxyphyllum ulicinum afforded, in addition to known compounds, 15 new germacrane derivatives with a 1β, 10α-epoxide, a carboxyl group at C-4, and different ester groups at C-9 and C-14. From the aerial ...
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(ELSEVIER SCIENCE BV, 2004-11-01)The formation of polymeric hybrid materials of siloxanes with gelatin (GE) starting from sodium metasilicate as the silica source, and their transformation into silica under different conditions have been studied. ...
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(IOP, 2020)Plasma-facing materials (PFMs) for nuclear fusion, either in inertial confinement fusion (ICF) or in magnetic confinement fusion (MCF) approaches, must withstand extremely hostile irradiation conditions. Mitigation strategies ...
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(Elsevier, 2018)Peridotite xenoliths collected from alkali basalts in the Argentinian Patagonia reveal the existence of an ancient depleted Paleoproterozoic mantle that records a subsequentmultistage metasomatic history.Metasomatismis ...
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(1996)Aldol reactions lithium alkyl acetates (LiCRR″CO2R′) with (RS)-2-(p-tolylsulfinyl)cyclohexanone (1) (as an epimeric mixture at C-2) take place with very efficient control of the configuration at the tertiary hydroxylic ...
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(Royal Society of Chemistry, 2016)A microwave-assisted method for the synthesis of tetracyclic tetra-hydropyridines via an intramolecular imino-Diels-Alder reaction in water is reported. The reaction proceeds under catalyst-free conditions and shows excellent ...
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(Springer, 2011)While evaluating several laboratory-cultured cyanobacteria strains for the presence of paralytic shellfish poison neurotoxins, the hydrophilic extract of Microcystis aeruginosa strain SPC777—isolated from Billings’s ...
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(2011)While evaluating several laboratory-cultured cyanobacteria strains for the presence of paralytic shellfish poison neurotoxins, the hydrophilic extract of Microcystis aeruginosa strain SPC777-isolated from Billings's ...
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(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2005-05)It has become increasingly common worldwide to auction the construction and operation of new highways to the bidder that charges the lowest toll. The resulting highway franchises often entail large increases in the value ...
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(ACADEMIC PRESS INC ELSEVIER SCIENCE, 2005-05)It has become increasingly common worldwide to auction the construction and operation of new highways to the bidder that charges the lowest toll. The resulting highway franchises often entail large increases in the value ...
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(American Economic Association, 1997)We build a conceptual framework to analyze the virtues and limitations of alternative mechanisms that can be used to auction a highway. We argue that current mechanisms, which fix the term of the franchise, create unnecesary ...
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(Springer, 2021)Low cycle fatigue life of high-strength reinforcing steel bars (ASTM A706 Grade 80), using photogrammetry by RGB methodology is evaluated. Fatigue tests are performed on specimens under constant axial displacement with ...
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(Universidad de Chile, 2021)
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(Universidad de Chile, 2006)Hace ya una década en Chile que las temáticas en torno al cuerpo y la sexualidad se han situado en el ojo del huracán, trabajos realizados por estudiosos de las ciencias sociales y análisis del discurso han contribuido ...