HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau...

Productive areas in the Canadian Arctic seasonally provide top predators with accessible and often predictable sources of energy. Arctic cod (Boreogadus saida) aggregate in shallow bays during the summer and are exploited by seabirds and marine mammals. Information concerning how prey is presented to predatory seabirds, and the cues seabirds use to optimize foraging potential, is limited. Hydro...

Stomach contents from 121 narwhals (Monondon monoceros) harvested in the eastern Canadian High Arctic and West Greenland were used to quantify seasonal changes in feeding activity and prey selection. Stomachs collected from summer harvests were mostly empty with little evidence of recent feeding. Stomachs collected in late fall and winter harvests had considerable amounts of undigested material...

Ecosystem surveys are carried out annually in the Barents Sea by Russia and Norway to monitor the spatial distribution of ecosystem components and to study population dynamics. One component of the survey is mapping the upper pelagic zone using a trawl towed at several depths. However, the current technique with a single codend does not provide fine-scale spatial data needed to directly study s...

Intervention in Obesity & Diabetes and Alternative Medicine; Between Myth Reality Salim Bouchentouf1,2* 1University of Saida, Faculty Technology, Algeria 2Laboratory Natural Bioactive Substances (LASNABIO), Tlemcen University, *Corresponding author:Salim Bouchentouf, University Technology Laboratory Submission:March 09, 2021;Published: March 30, 2021 DOI: 10.31031/IOD.2021.05.000606 ISSN 2578-0...

Most kinetic studies of methanol synthesis over Cu/ZnO catalysts have been carried out using mixtures of carbon monoxide and hydrogen. But in some cases (1) the synthesis gas has also contained carbon dioxide (2). Power rate laws as well as complicated rate expressions have been proposed over the years. The detailed kinetics of the surface processes is virtually unknown. With the exception, per...

HAL is a multi-disciplinary open access archive for the deposit and dissemination of scientific research documents, whether they are published or not. The documents may come from teaching and research institutions in France or abroad, or from public or private research centers. L’archive ouverte pluridisciplinaire HAL, est destinée au dépôt et à la diffusion de documents scientifiques de niveau...

*Ahmed ALLALI, **Hamid BOUZEBOUDJA, ***Laouer MOHAMED, ****Mostafa RAHLI, ***** Abdelkader ZEBLAH * University of Oran USTO, Engineering Faculty, Electrical Department, B.P. 1505 El M’ Naour, Oran, Algeria E-mail: [email protected] ** University of Oran USTO, Engineering Faculty, Electrical Department, B.P. 1505 El M ‘Naour, Oran, Algeria: [email protected] *** Centre Universitaire de Saida...