Institution
Tunis University
Education•Tunis, Tunisia•
About: Tunis University is a education organization based out in Tunis, Tunisia. It is known for research contribution in the topics: Population & Thin film. The organization has 11745 authors who have published 15400 publications receiving 154900 citations. The organization is also known as: University of Tunis & UT.
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TL;DR: In this article, the synthesis and the study of physico-chemical and catalytic properties of a series of lanthanum manganite perovskite-type oxide using the one-step combustion method were investigated.
Abstract: The present work deals with the synthesis and the study of physico-chemical and catalytic properties of a series of lanthanum manganite perovskite-type oxide using the one-step combustion method. Glycine was used as complexing agent and fuel. Seven glycine-to-nitrate ratios from 0.32 to 0.8 were investigated. XRD patterns show a single phase perovskite type oxide when glycine-to-nitrate ratio is above 0.37. Glycine/nitrate ratio affects significantly the surface areas, which range in 18–37 m2/g. The use of fuel-rich precursor allows an enhancement of the specific surface area, the reducibility of manganese and the mobility of desorbed oxygen. The light-off temperature for 50% and 90% of methane conversion was found to be directly related to surface areas. The highest catalytic activity was obtained for glycine-to-nitrate ratio of 0.8, which exhibits the highest superficial concentration of manganese and the highest amount of active oxygen. This catalyst shows also a good thermal stability.
68 citations
TL;DR: In this paper, the authors investigated spillover effects and portfolio diversification between the four major developed stock markets (USA, Europe, Japan and Asia) and five of the most important emerging stock markets known as the BRICS (Brazil, Russia, India, China and South Africa).
68 citations
TL;DR: In this paper, the effects of gamma irradiation on the properties of Molybdenum trioxide (MoO 3 ) thin films were investigated and the optical energy band gap and Urbach energy were found to be gamma-dose dependent.
68 citations
TL;DR: The accessible version “Moodle Acc+ ” of the well known e-learning platform Moodle is presented as well as new elaborated generic models and a range of tools for authoring and evaluating accessible educational content.
68 citations
TL;DR: It is proved that doxastic independence and non-interactivity are equivalent in the context of the transferable belief model.
68 citations
Authors
Showing all 11809 results
| Name | H-index | Papers | Citations |
|---|---|---|---|
| Walid Saad | 85 | 749 | 30499 |
| Alexandre Mebazaa | 83 | 716 | 39967 |
| Albert Y. Zomaya | 75 | 946 | 24637 |
| Anis Larbi | 67 | 259 | 15984 |
| Carmen Torres | 64 | 461 | 15416 |
| Chedly Abdelly | 60 | 429 | 14181 |
| Hans R. Kricheldorf | 57 | 825 | 18670 |
| Mohamed Benbouzid | 51 | 492 | 12164 |
| Enrique Monte | 48 | 118 | 7868 |
| Fayçal Hentati | 47 | 153 | 10376 |
| A. D. Roses | 45 | 120 | 24719 |
| Laurent Nahon | 45 | 205 | 6252 |
| Bessem Samet | 45 | 308 | 7151 |
| Maxim Avdeev | 42 | 526 | 8673 |
| Abdellatif Boudabous | 40 | 174 | 5605 |