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Showing 1 to 16 of 16 for “"KMnO4"”.
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Uso de permanganato de potássio na conservação pós-colheita de banana 'Prata'
… avaliar o efeito do permanganato de potássio (KMnO4) associado à embalagem plástica na manutenção da qualidade pós-colheita de banana 'Prata' (Musa spp. AAB) armazenada à temperatura ambiente e sob refrigeração. Buquês de quatro frutos foram embalados em sacos de polietileno de baixa densidade, …
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Degradation of the Insensitive Munitions Compound 3-Nitro-1,2,4-triazol-5-one (NTO) via Sequential Reducing-Oxidizing Conditions
… (MENA), by potassium permanganate (KMnO4), a common oxidant used for in situ chemical oxidation (ISCO). The results demonstrated that lower concentrations of KMnO4 and shorter timescales are needed to oxidize MENA and ATO than to oxidize DNAN and NTO. In another experiment, NTO was …
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Carbon Dioxide Capture With Amine Functionlized Graphene Oxide
… method and "hummers' method with additional kmno4." Graphene oxide was then functionalized with ethylenediamine (eda). Different purification methods for graphene oxide were studied as well as different functionalization method times. Graphite oxide and functionalized graphene oxide has been …
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Nanocomposite-graphene based platform for heavy metal detection
… graphite to graphite oxide using H2SO4 and KMnO4 and reducing graphene oxide to graphene by using NaBH4. Graphene was then characterized using FT-IR, TEM, AFM, XRD, Raman spectroscopy and solid state NMR. Nafion-Graphene in combination with a mercury film electrode, bismuth film electrode …
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Synthesis and characterizations of nanostructured MnO2 electrodes for supercapacitors applications
… from 1 to 6 hours to optimise the conditions. KMnO4 was reduced by MnCl.H2O under low temperature, whereas MnSO4.4H2O, (NH4)2S2O8 and (NH4)2SO4 were co-precipitated under hydrothermal conditions in a taflon autoclave to synthesise various -MnO2 nano-structures.
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SYNTHESIS, CHARACTERIZATION, DECORATION AND FILLING OF CARBON NANOTUBES
… in air and by liquid-phase oxidation using KMnO4, HNO3 and a mixture of HNO3/H2SO4 as oxidants. We approached the decoration of these oxidized tubes from two angles. The first approach, involving metal deposition directly onto the oxidized tube surfaces, yielded nanotubes decorated with very …
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Elaboración de un preparado tópico a base del extracto natural de hojas de Sansevieria trifasciata laurentii (Espada del diablo)
… de taninos con permanganato de potasio (KMnO4) 0.1N utilizando índigo carmín como indicador, y un método colorimétrico que consiste en la reacción de los taninos con una solución de ferricianuro de potasio 0.004 M y una solución de cloruro férrico 0.008 M en Acido Clorhídrico 0.08 M; así …
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Synthesis and characterization of high-performance supercapacitor devices based on carbon/MnO2 composite and carbonized iron cations adsorbed onto polyaniline/nickel graphene foam
… was successfully synthesized using KMnO4 solution and spent printing carbon grains method. The structural and morphological characterization of the as-synthesized electrode materials was carried out using scanning electron microscopy (SEM), transmission electron microscopy (TEM), …
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Phosphate stabilisation of partly oxidised, polyminerallic mine wastes
… phosphate coatings formed on all sulphides when KMnO4 and phosphate fertilisers were used in the coating solutions. Otherwise tetrahedrite was uncoated. The phosphate coatings were most abundant on chalcopyrite and were interpreted to be chemically connected with the underlying sulphide. In …
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Evaluación de la eficacia de la combinación de permanganato potásico y radiación UV-C en la conservación de frutos climatéricos y su impacto en la calidad sensorial y la reducción de pérdidas postcosecha.
… destaca el empleo de permanganato de potasio (KMnO4) por su elevada eficiencia a la hora de eliminar el etileno y su coste reducido. Concretamente, esta molécula consigue oxidar el etileno a CO2 y agua. También se han desarrollado diversas estrategias para mejorar el contacto entre el …
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Oxidative Treatment of Emerging Micropollutants and Viral Pathogens by Potassium Permanganate and Ferrate: Kinetics and Mechanisms
… by kinetic models that include temperature, KMnO4 dosage, pH, and source water oxidant demand as input parameters. A large number of reaction products from Mn(VII) oxidation of CBZ, CPR, LCM, TMP, and EE2 and Fe(VI) oxidation of CBZ were identified by liquid chromatography-tandem mass …
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Colorimetric sensor array for identification of fungi & ultrasonic spray synthesis for supercapacitor materials
… and produces one microsphere. Upon heating, KMnO4 was decomposed into MnO2 microspheres; this synthetic process can easily be scaled up. Characterization of the MnO2 microspheres by SEM, TEM, powder XRD, Raman Spectroscopy, and XPS is described. Different morphologies of MnO2 microspheres …
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Multifunctionality in epoxy/glass fibers composites with graphene interphase
… was oxidized using potassium permanganate (KMnO4) in acidic solution. Using ultrasonic technique, the graphite oxide was dispersed homogenously in water to create a stable GO suspension which was used as a bath in the EPD process. For the coating process, two copper plates were used as …
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STUDIES OF 2D LAYERED MnO2 AND MoS2 FOR ANTIBACTERIAL AND ELECTROCHEMICAL APPLICATIONS
… polytypes were synthesized by decomposition of KMnO4 at different temperatures, and three polytypes including two-layer orthogonal (2O), two-layer hexagonal (2H) and three-layer rhombohedral (3R) were identified in the samples. The synthetic temperature controlled the phase formation and …
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Asymmetrische Synthese von 1-Aminocyclobutancarbonsäuren
… eine literaturbekannte Methode Pinakolon (5) mit KMnO4 zur 3,3-Dimethyl-2-oxobutansäure (13) oxidiert und diese dann mit einem Überschuß MeMgCl zur gewünschten razemischen Carbonsäure 4 umgesetzt wurde (Abb. 112). Für die Razematspaltung der razemischen α-Hydroxycarbonsäure 4 erwies sich …
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A new active and antimicrobial package for preservation of vegetables
… postharvest situations. Potassium permanganate (KMnO4) is usually used for this purpose, being added to different absorbent materials such as activated carbon, silica gel, aluminum oxide, and clay minerals like sepiolite, to complement the properties of the active packaging. For all the above the …