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.
Topics: Population, Thin film, Band gap, Nonlinear system, Cluster analysis
Papers published on a yearly basis
Papers
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TL;DR: The main results showed that the studied species of Ziziphus genus are an excellent source of natural bioactive molecules that could be an interesting material for industrial and food purposes.
Abstract: Ziziphus lotus L. (Lam.) and Z. mauritiana Lam., as a widespread species in Tunisia, are well known for their medicinal and food uses. The aim of the present study was to screen the content of total polyphenols, flavonoids, and condensed tannins together with the radical scavenging capacity and the antimicrobial activity of leaves, fruits and seeds extracts of Z. lotus and Z. mauritiana from different localities. Results showed that leaves extracts presented the highest phenolic compounds content for both species. Furthermore, LC-ESI-MS analysis allowed the identification of 28 bioactive compounds regardless of species and organs, with the predominance of quinic acid and rutin. Leaves extract of Z. mauritiana possessed the highest total antioxidant capacity. The antimicrobial tests showed that leaves extracts of Z. mauritiana and Z. lotus from Oued Esseder exhibited the highest activity against four bacterial strains (Staphylococcus aureus, Listeria monocytogenes, Salmonella typhimurium and Escherichia coli). The main results showed that the studied species of Ziziphus genus are an excellent source of natural bioactive molecules that could be an interesting material for industrial and food purposes.
47 citations
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23 May 2009
TL;DR: BonjourGrid is a software which aims to link a discovery service based on publish/subscribe protocol with the upper layer of a Desktop Grid middleware bridging the gap to meta-grid, and is robust and able to orchestrate more than 400 instances of XtremWeb middleware in a concurrent fashion on a 1000 host cluster.
Abstract: While the rapidly increasing number of users and applications running on Desktop Grid (DG) systems does demonstrate its inherent potential, current DG implementations follow the traditional masterworker paradigm and DG middlewares do not cooperate. To extend the DG architecture, we propose a novel system, called BonjourGrid, capable of 1) creating, for each user, a specific execution environment in a decentralized fashion and 2) contrarily to classical DG, of orchestrating multiple and various instances of Desktop Grid middlewares. This will enable us to construct, on demand, specific execution environments (combinations of XtremWeb, Condor, Boinc middlewares). BonjourGrid is a software which aims to link a discovery service based on publish/subscribe protocol with the upper layer of a Desktop Grid middleware bridging the gap to meta-grid. Our experimental evaluation proves that BonjourGrid is robust and able to orchestrate more than 400 instances of XtremWeb middleware in a concurrent fashion on a 1000 host cluster. This experiment demonstrates the concept of BonjourGrid as well as its potential and shows that, comparing to a classical Desktop Grid with one central master, BonjourGrid suffers from an acceptable overhead that can be explained.
47 citations
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TL;DR: In this article, a computational fluid dynamics (CFD) model was developed for the simulation of a phase change thermal energy storage process in a 100 l cylindrical tank, horizontally placed.
47 citations
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TL;DR: In this paper, the authors examined the portfolio risk management and dynamic co-movements between crude oil and Saudi sector stock markets using wavelet approach and a value at risk measure.
47 citations
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TL;DR: The phylogenetic diversity of a collection of 96 Bacilli, isolated from 17 distinct stations of 5 oceanographic campaigns, points out the need of more extensive studies to understand their distribution and ecology in deep‐sea environments.
Abstract: Members of the genus Bacillus and related genera are ubiquitous in nature. However, Bacillus species isolated from marine sediments have attracted less interest respect to their terrestrial relatives. Here, we report the phylogenetic diversity of a collection of 96 Bacilli, isolated from 17 distinct stations of 5 oceanographic campaigns. The diversity was analysed by phenotypic and molecular approaches based on the amplified rDNA restriction analysis (ARDRA), amplification of the internal transcribed spacers (ITS-PCR) and on 16S rRNA sequencing. Intra-specific polymorphism was efficiently detected by biochemical analysis and ARDRA while results of ITS-PCR were in agreement with 16S rRNA sequencing. The identification results assigned 68% of the isolates to the species B. subtilis, B. licheniformis, B. pumilus and B. cereus. Phylogenetic analysis allowed the separation of 9 isolates in a clade that may represent a group of obligate marine Bacillus since they clustered with B. firmus, B. foraminis and marine isolates with metal oxidation and bioaccumulation capabilities. The remaining isolates showed a close affiliation to the genera Virgibacillus, Gracilibacillus and Paenibacillus. The widespread of Bacilli and their high diversity level observed in this work point out the need of more extensive studies to understand their distribution and ecology in deep-sea environments.
47 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 |