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287 results on '"Toumi, Mohamed"'

14. Map of the Global Pollution of the Algiers Region Established by the IAP Method (Index of Atmospheric Purity)

Author

Saib, Henia, Toumi, Mohamed, Rahali, Mohammed, Förstner, Ulrich, Series Editor, Rulkens, Wim H., Series Editor, Salomons, Wim, Series Editor, Ksibi, Mohamed, editor, Ghorbal, Achraf, editor, Chakraborty, Sudip, editor, Chaminé, Helder I., editor, Barbieri, Maurizio, editor, Guerriero, Giulia, editor, Hentati, Olfa, editor, Negm, Abdelazim, editor, Lehmann, Anthony, editor, Römbke, Jörg, editor, Costa Duarte, Armando, editor, Xoplaki, Elena, editor, Khélifi, Nabil, editor, Colinet, Gilles, editor, Miguel Dias, João, editor, Gargouri, Imed, editor, Van Hullebusch, Eric D., editor, Sánchez Cabrero, Benigno, editor, Ferlisi, Settimio, editor, Tizaoui, Chedly, editor, Kallel, Amjad, editor, Rtimi, Sami, editor, Panda, Sandeep, editor, Michaud, Philippe, editor, Sahu, Jaya Narayana, editor, Seffen, Mongi, editor, and Naddeo, Vincenzo, editor

Published
2021
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17. Protective Effects of Pelargonium graveolens Essential Oil on Methomyl-Induced Oxidative Stress and Spatial Working Memory Impairment in Association with Histopathological Changes in the Hippocampus of Male Wistar Rats

Author

Khene M’hammed Amin, Chabane Kahina, Habchi Nawel, Zaida Faiza, Giaimis Jean, Toumi Mohamed, Mameri Saâdia, and Baz Ahsene

Subjects
methomyl, hippocampus, pelargonium graveolens, spatial working memory, oxidative stress, Neurosciences. Biological psychiatry. Neuropsychiatry, RC321-571
Abstract

Introduction: Methomyl (MET) is a carbamate insecticide, used in agriculture and public health to eliminate harmful insects. Besides its advantages in agriculture, it causes neurotoxic effects. The aim of this study was to evaluate the effect of MET on Spatial Working Memory (SWM), oxidative stress parameters, and histopathological changes in the hippocampus, as well as the possible protective role of Pelargonium graveolens Essential Oil (EO). Methods: Male Wistar rats were randomized into four groups of six animals: group I as the control that received the vehicle; group II received EO (75 mg/kg b.w), group III received MET (2 mg/kg b.w); and group IV received both MET and EO. The rats were administered the respective doses orally by gavage for 28 days. SWM was assessed using Y-maze on the day before the first treatment and day 28 after the last dose. They were sacrificed by decapitation and their brains were taken for assessing oxidative stress parameters and histopathological analysis. Results: MET treatment caused SWM deficits. Furthermore, drastic changes were observed in aspartate transaminase, alanine aminotransferase, and alkaline phosphatase activities. The level of malondialdehyde significantly increased, whereas antioxidant (glutathione-S-transferase and catalase) enzyme activities significantly decreased. The CA1 region of the hippocampus of rats exposed to MET revealed severe histological alterations. However, supplementation with EO improved SWM and partially restored the activities of antioxidant systems and prevented neuronal cell damage. Conclusion: P. graveolens EO has the potential in mitigating most of the adverse effects in the hippocampus and prevents SWM impairment induced by MET toxicity.

Published
2020

23. Cohomology groups of integral domains and -algebras

Author

Akriche, Mouadh and Toumi, Mohamed Ali

Subjects
Mathematics - Functional Analysis, Mathematics - Operator Algebras, Primary 13D03, Secondary 06F25, 46A40
Abstract

In this paper, we introduce a new homology theory devoted to the study of linear operators such as local mutipliers and band preserving operators. The idea is to study the vanishing homology problem. This enables us to characterize integral domains in which any local multiplier is a multiplier, which gives a partial answer to a problem posed by R. V. Kadison [J. Algebra 130, No.2, (1990) 494-509]. Finally, we solve the Wickstead problem [Compositio Math, 35(3) (1977), 225--238] for the class of Archimedean unital f-algebras., Comment: 16 pages

Published
2011

35. Chlorine doping impact on the photocatalytic and antibacterial activity of sprayed In2S3 films

Author

Toumi, Mohamed, primary, Tiss, Belgacem, additional, Bouguila, Noureddine, additional, Cristea, Daniel, additional, Croitoru, Catalin, additional, Ghiuta, Ioana, additional, Marin, Alexandru Horia, additional, Velicu, Ioana Laura, additional, Tiron, Vasile, additional, Craciun, Valentin, additional, Kraini, Mabrouk, additional, Alaya, Sahbi, additional, Moura, Cacilda, additional, and Cunha, Luis, additional

Published
2022
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49. Mobile nodes for improving security and lifetime efficiency in wireless sensor networks

Author

Ouzzif Mohamed, Mohammed Saïd Salah, Toumi Mohamed, and Maizate Abderrahim

Subjects
General Computer Science, Network packet, business.industry, Computer science, 020206 networking & telecommunications, Cryptography, 02 engineering and technology, Theoretical Computer Science, 0202 electrical engineering, electronic engineering, information engineering, Rekeying, Key (cryptography), 020201 artificial intelligence & image processing, Elliptic curve cryptography, Key management, business, Wireless sensor network, Energy (signal processing), Computer network
Abstract

Purpose This paper aims to provide an acceptable level of security while taking into account limited capabilities of the sensors. This paper proposes a mobile approach to securing data exchanged by structured nodes in a cluster. Design/methodology/approach The approach is based on mobile nodes with significant calculation and energy resources that allow cryptographic key management and periodic rekeying. However, mobility in wireless sensor networks aims to increase the security and lifetime of the entire network. The technical methods used in this paper are based on cryptography elliptic curves and key management through a balanced binary tree. Findings To maintain the effectiveness of critical applications based on wireless sensor networks, a good level of nodes security must be ensured, taking into account their limited energy and computing. Collaboration between powerful mobile nodes provides better coverage and a good key management. Owing to the significant capabilities of the mobile nodes, they can be used to secure critical applications at the same time if needed in applications requiring difficult operations. Originality/value To compare the performance of the proposed approach with other mobile algorithms, the following metrics are focused on: the energy consumed by normal sensors and cluster heads, the number of packets exchanged during key installation, time to generate and distribute cryptographic keys and the memory used by the different sensors to store keys.

Published
2019
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