Search results for "manga"

The different catalytic behaviour in the propane total oxidation of cobalt and manganese oxides prepared by a wet combustion procedure

2013

Abstract Cobalt oxide and manganese oxide catalysts have been prepared through aqueous synthesis using a wet combustion procedure. These materials have been tested as catalysts for the total oxidation of propane. It has been observed a different catalytic behaviour between cobalt and manganese oxides although for both oxides a very high catalytic activity has been obtained. Cobalt oxides prepared by the wet combustion procedure are less reactive than a simple cobalt oxide prepared without the addition of organic acids. However, in the case of manganese oxide the use of organic acids highly increases the catalytic activity. The different catalytic behaviour has been related to the variation …

Determination of Cd, Co, Cu, Fe, Pb, Mn, Ni and Zn in diets: Development of a method

1991

A method useful for the determination of cadmium, cobalt, copper, iron, lead, manganese, nickel and zinc in diets is described. Organic matter is destroyed applying a wet procedure, and element content is measured by flame atomic absorption spectroscopy (FAAS) in the case of copper, iron, manganese, nickel and zinc, and by graphite furnace (GF-AAS) in the case of cadmium, cobalt and lead. The matrix interference study is carried out. Values found for linearity, detection and quantitation limits as well as accuracy show that the described method is useful to determine the elements taken into account at usual levels in diets.

DFT insights into the oxygen-assisted selective oxidation of benzyl alcohol on manganese dioxide catalysts

2020

Abstract The reactivity pattern of the MnO2 catalyst in the selective aerobic oxidation of benzyl alcohol is assessed by density functional theory (DFT) analysis of adsorption energies and activation barriers on a model Mn4O8 cluster. DFT calculations predict high reactivity of defective Mn(IV) sites ruling a surface redox mechanism, L-H type, involving gas-phase oxygen. Bare and promoted (i.e., CeOx and FeOx) MnOx materials with high surface exposure of Mn(IV) sites were synthesized to assess kinetic and mechanistic issues of the selective aerobic oxidation of benzyl alcohol on real catalysts (T, 333–363 K). According to DFT predictions, the experimental study shows: i) comparable activity…

Dissociation-constants of metat-ion-complexes with alkaline phosphatase from pig kidney.

1976

Using metal-ion buffers it was possible to remove Zn2+, Mg2+ and Mn2+ ions of pig kidney alkaline phosphatase reversibly. The dissociation constants obtained are KEMg: 4 X 10(-7) M, KEMn: 4 X 10(-8) M and KEZn: 8 X 10(-13) M (22 degrees C, pH: 9.6, mu: 0.07).

Hydrothermally Synthesized Strontium Peroxyapatite

2015

The current research focuses on peroxide ion incorporation in the structure of strontium hydroxyapatite (SrHAp) by exposure to H2O2 ina closed hydrothermal vessel under mild conditions at 130 to 170 °C. Peroxide enriched strontium apatite (SrPerAp) was characterized for structure by X-Ray diffraction, for peroxide content- by permanganometric titration and then viewed by SEM. This study continued from previous work that used 30%H2O2 and showed a higher included peroxide content after processing with 50% H2O2 at 130 °C 70% of the theoretical peroxide content in apatitic channels of strontium apatite. This is the highest peroxide content incorporated to date and employs a lower temperature th…

Spins and magnetic moments of 58;60;62;64Mn ground states and isomers

2015

The odd-odd 54;56;58;60;62;64Mn isotopes (Z = 25) were studied using bunched-beam collinear laser spectroscopy at ISOLDE, CERN. From the measured hyperfine spectra the spins and magnetic moments of Mn isotopes up to N = 39 were extracted. The previous tentative ground state spin assignments of 58;60;62;64Mn are now firmly determined to be I = 1 along with an I = 4 assignment for the isomeric states in 58;60;62Mn. The I = 1 magnetic moments show a decreasing trend with increasing neutron number while the I = 4 moments remain quite constant between N = 33 and N = 37. The results are compared to large-scale shell-model calculations using the GXPF1A and LNPS effective interactions. The excellen…

Fabrication, Electrical Characterization and 1/f Noise Study of Submicron-sized Superconducting Tunnel Junctions

2016

Rewriting Romance in the Second Half of 20th Century in Italy

2013

Many authors in the last century offer us the possibility to look at romance through their rewriting of Italian tradition, but they also offer the possibility to look at rewriting through romance. A systematic examination of every single work would need an article itself. Here the focus is rather on the phenomenon and its implications with tradition and its transformations; and on the intellectual context where they take place. Despite the very core of the poetics of rewriting can be located between the Sixties and the Eighties, these palimpsests go further, into the Nineties. From Calvino, Manganelli and Sanguineti, to Celati, Bufalino and Santagata, we are able to look at different declen…

Tora-san and Kurosagi as Symbols of Changing Japanese Society

2013

Attiecība starp varu un cilvēcību F. Kafkas „Metamorfoze”: interpretēta japāņu manga

2016

Bakalaura darba tēma ir Franca Kafkas romānā „Metamorfoze” atrodamu varas attiecību interpretācija un analīze japāņu manga medijos, balstoties uz Bjorna Krausa un Edvarda Šila varas teorijām. Darbā tika izstrādāts salīdzinošais multimediju pētījums, kura mērķis ir pierādīt un aprakstīt attiecību starp cilvēcību un varu Kafkas darbā, kā arī identificēt kā šī attiecība tiek parādīta „Metamorfozes” ietekmētajās darbos.Pētījuma rezultāti rāda, ka „Metamorfozē” un analizētājās manga eksistē iekšējais, identitātes varas konflikts un ārējais, sabiedriskais varas konflikts starp cilvēci un tās antitēzi., kurā cilvēcība līmenis korelē ar varas līmeni. Noslēgumā tika secināts, ka gan oriģinālais vara…