6 10 8556 Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource https://journals.univ-chlef.dz/index.php/natec/oai Dataset Data encoded in a defined structure. Examples include lists, tables, and databases. A dataset may be useful for direct machine processing. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource NOURI, Mohamed BOUZIDI, Makram REZGUI, Walid SOLTANI, Fethia REJEB, Mohamed Néjib Date A point or period of time associated with an event in the lifecycle of the resource 2022-12-19 Description An account of the resource Environmental indicators are essential tools for tracking environmental risks especially land use degradation. Supporting theenvironmental evaluation and research items needs usually a heavy and costly field work. For these reasons, some methods and indicators of risks have gained in importance in many countries and in international reports. As part of their commitment to transparency to real information, public authority increasingly uses a reduced number of indicators or select existent methods to report on major environmental issues. These economic and time justifications cannot nor ignore or hide the disadvantages of these methods apart from their validation areas especially in arid countries. The study concerned the application of a European method for the evaluation of the risks of desertification namely “the Mediterranean Desertification and Land Use or MEDALUS method”, which had deserved more researches to adapt it to the arid conditions. Indeed, testing this method to the desertification risks evaluation of the agricultural land-use in Tunisia has showed its limits. The review of parameters used and the re-calibration of the risks levels to the agricultural units have improved the results of this method in arid conditions. This improvement was limited about 10% (land degradation risks has reduced from 90.5% to 81% of surface studied) when adapted soil quality index to local conditions and re-calibration of risks levels were applied. But these results do not prevent that validation of the method would improve analyzes and understanding of this phenomenon in local conditions. Les indicateurs environnementaux sont des outils essentiels pour suivre les risques environnementaux, notamment la dégradation de l'utilisation des sols. L'évaluation environnementale et les éléments de recherche nécessitent généralement un travail de terrain lourd et coûteux. Pour ces raisons, certaines méthodes et certains indicateurs de risques ont gagné en importance dans de nombreux pays et dans les rapports internationaux. Dans le cadre de leur engagement en faveur de la transparence et de l'information réelle, les autorités publiques utilisent de plus en plus un nombre réduit d'indicateurs ou sélectionnent des méthodes existantes pour rendre compte des principaux problèmes environnementaux. Ces justifications économiques et temporelles ne peuvent ni ignorer ni masquer les inconvénients de ces méthodes en dehors de leurs zones de validation notamment dans les pays arides. L'étude a porté sur l'application d'une méthode européenne d'évaluation des risques de désertification, à savoir "la méthode MEDALUS" (Mediterranean Desertification and Land Use), qui aurait mérité plus de recherches pour l'adapter aux conditions arides. En effet, l'application de cette méthode à l'évaluation des risques de désertification de l'utilisation des terres agricoles en Tunisie a montré ses limites. La révision des paramètres utilisés et le re-calibrage des niveaux de risques aux unités agricoles ont amélioré les résultats de cette méthode en conditions arides. Cette amélioration a été limitée à environ 10% (les risques de dégradation des terres ont été réduits de 90,5% à 81% de la surface étudiée) lorsque l'indice de qualité des sols adapté aux conditions locales et le re-calibrage des niveaux de risques ont été appliqués. Mais ces résultats n'empêchent pas que la validation de la méthode permettrait d'améliorer l'analyse et la compréhension de ce phénomène dans les conditions locales. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/91 Language A language of the resource eng Publisher An entity responsible for making the resource available Hassiba Benbouali University of Chlef Relation A related resource https://journals.univ-chlef.dz/index.php/natec/article/view/91/64 Rights Information about rights held in and over the resource Copyright (c) 2020 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/deed.en Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 12 No. 01 (2020); 30-37 Revue Nature et Technologie; Vol. 12 No 01 (2020); 30-37 2437-0312 1112-9778 Subject The topic of the resource Desrtification Desertification Désertification Désertification Title A name given to the resource Risques de désertification : Sensibilité et limites de la méthode Medalus dans les zones semi-arides (centre de la Tunisie). Desertification Risks: Sensitivity And Limits Of The Medalus Method In Semi-arid Areas (center Of Tunisia). Type The nature or genre of the resource info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Peer-reviewed Article Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource https://journals.univ-chlef.dz/index.php/natec/oai Dataset Data encoded in a defined structure. Examples include lists, tables, and databases. A dataset may be useful for direct machine processing. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource CHELAHI CHIKR, Yamina MERDJI, Ali GOUASMI, Sadek Date A point or period of time associated with an event in the lifecycle of the resource 2022-12-19 Description An account of the resource Implantology is the fixation of an artificial root made of titanium in the mandibular bone, emerging from the gum and supporting atooth or prosthetic element. In this work, the mechanical behavior of dental implants with different geometric shapes is analyzednumerically by the finite element method. The first objective of this study is to show the importance of the geometric parameters suchas length on the variation of the equivalent stress in the close vicinity of the bone / implant interface. These interfacial stresses areevaluated on the outside and inside of the net. The results clearly show that the best model of the implant obtained is that of 10.43 mmin length. The second objective is focused on the distribution of von Mises stress in the bone and the dental implant in different loadingcases. It is important to know the effects of this type of treatment to obtain a primary stabilization of the structure or at the interfacebone/implant. L'implantologie est la fixation d'une racine artificielle en titane dans l'os mandibulaire, émergeant de la gencive et supportant une dent ou un élément prothétique. Dans ce travail, le comportement mécanique d'implants dentaires de différentes formes géométriques est analysé numériquement par la méthode des éléments finis. Le premier objectif de cette étude est de montrer l'importance des paramètres géométriques tels que la longueur sur la variation de la valeur équivalente de l'indice de réfraction. la longueur sur la variation de la contrainte équivalente dans le voisinage immédiat de l'interface os/implant. Ces contraintes interfaciales sont évaluées à l'extérieur et à l'intérieur du filet. Les résultats montrent clairement que le meilleur modèle d'implant obtenu est celui de 10,43 mm de longueur. Le deuxième objectif est centré sur la distribution des contraintes de von Mises dans l'os et l'implant dentaire dans différents cas de chargement. cas de chargement. Il est important de connaître les effets de ce type de traitement pour obtenir une stabilisation primaire de la structure ou à l'interface os/implant. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/90 Language A language of the resource eng Publisher An entity responsible for making the resource available Hassiba Benbouali University of Chlef Relation A related resource https://journals.univ-chlef.dz/index.php/natec/article/view/90/63 Rights Information about rights held in and over the resource Copyright (c) 2020 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/deed.en Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 12 No. 01 (2020); 20-29 Revue Nature et Technologie; Vol. 12 No 01 (2020); 20-29 2437-0312 1112-9778 Subject The topic of the resource Bone Implant Thread Von Mises stress Interfacial stress MEF Bone/Implant Os Implant Fil Contrainte de von Mises Contrainte interfaciale MEF Os/Implant Title A name given to the resource Effects of the Geometric Parameters on the Interfacial Stresses Bone/Implant Effets des paramètres géométriques sur les contraintes interfaciales Os/implant Type The nature or genre of the resource info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource https://journals.univ-chlef.dz/index.php/natec/oai Dataset Data encoded in a defined structure. Examples include lists, tables, and databases. A dataset may be useful for direct machine processing. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource BOUMEHRAZ, Mohammed-Amin MELLAS, Mekki BOUCETTA, Farida MEGHAICHI, Nour El- Houda CHEBAH, Meriem Date A point or period of time associated with an event in the lifecycle of the resource 2022-12-19 Description An account of the resource The stability of infrastructure is a major concern for various economic, ecological or, more importantly, the security of buildings.This can be done by different techniques, mechanical, chemical or both, to improve the geotechnical properties of unstable soils. Thetechniques used are the additions, of which, the most common are lime and cement.. The purpose of this study is to determine theevolution of the geotechnical properties of a shale soil of the university center of El-Aouana in the wilaya of Jijel (Algeria). The sampletaken on site was modified with additives proportions, 0, 1 %, 3% and 7% of the replacement of cement and lime in dry weight in orderto test the different properties of the fresh paw of clay soil. Finally, on conclude that the addition of a binder (Cement or lime) to shalesoil causes a reduction in plasticity, an improvement in compaction characteristics with Proctor, a rapid increase in the immediate liftindex depending on the treatment. and an increase in cohesion and the angle of friction La stabilité des infrastructures est un souci majeur pour différentes raisons économiques, écologiques ou, plus important, la sécuritédes batiment. Ceci peut se faire par différentes techniques, mécanique, chimique ou les deux à la fois, afin d’améliorer les propriétésgéotechniques des sols instables. Les techniques utilisées sont les ajouts, dont les plus courants sont la chaux et le ciment. Cette étude a pour objet de déterminer l’évolution des propriétés géotechniques d’un sol schisteux du pôle universitaire d’El-Aouana dans la wilaya de Jijel (Algérie). L’échantillon prélevé sur site a été modifié avec des proportions d’additifs avec 0, 1 %, 3 % et 7 % du remplacement du ciment et de la chaux en poids sec afin de tester les différents proprietées de la patte fraiche du sol argileux.On conclut que l’addition d’un liant (Ciment ou chaux) au sol schisteux provoque une réduction de la plasticité, une amélioration des caractéristiques de compactage au Proctor, une augmentation rapide de l’indice de portance immédiat en fonction du traitement et une augmentation de la cohésion et de l’angle de frottement. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/89 Language A language of the resource fra Publisher An entity responsible for making the resource available Hassiba Benbouali University of Chlef Relation A related resource https://journals.univ-chlef.dz/index.php/natec/article/view/89/62 Rights Information about rights held in and over the resource Copyright (c) 2020 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/deed.en Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 12 No. 01 (2020); 10-19 Revue Nature et Technologie; Vol. 12 No 01 (2020); 10-19 2437-0312 1112-9778 Subject The topic of the resource Lime Cement Shale Limits Shear Civil Ingineering Chaux Ciment Schiste Limites Cisaillement Génie civil Title A name given to the resource Study of Schist Treatment with Cement and Lime Comportement mécanique du schiste traité par des ajouts du ciment et de la chaux Type The nature or genre of the resource info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Peer-reviewed Article Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource https://journals.univ-chlef.dz/index.php/natec/oai Dataset Data encoded in a defined structure. Examples include lists, tables, and databases. A dataset may be useful for direct machine processing. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource AOUFI, Boutheyna DIDI, Mohamed Amine Date A point or period of time associated with an event in the lifecycle of the resource 2022-12-19 Description An account of the resource The removal of two different heavy metals in aqueous solutions was investigated with polyamide nanofiltration membrane SNTENF270-2540, the results show that the retention of iron ions was total (100%). Depending of the experimental conditions, the retentionof copper ions was varied from 82% to 94%. It was observed that the pH has no influence in the iron retention. The retention of ions bynanofiltration was done by Donnan effect (electrostatic repulsion) and counter-ion volume effect (steric exclusion). L'élimination de deux métaux lourds différents dans des solutions aqueuses a été étudiée avec la membrane de nanofiltration en polyamide SNTE NF270-2540, les résultats montrent que la rétention des ions de fer était totale (100%). En fonction des conditions expérimentales, la rétention des ions cuivre a varié de 82% à 94%. Il a été observé que le pH n'a aucune influence sur la rétention du fer. La rétention des ions par nanofiltration s'est faite par effet Donnan (répulsion électrostatique) et par effet de volume du contre-ion (exclusion stérique). Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/88 Language A language of the resource eng Publisher An entity responsible for making the resource available Hassiba Benbouali University of Chlef Relation A related resource https://journals.univ-chlef.dz/index.php/natec/article/view/88/61 Rights Information about rights held in and over the resource Copyright (c) 2020 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/deed.en Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 12 No. 01 (2020); 03-09 Revue Nature et Technologie; Vol. 12 No 01 (2020); 03-09 2437-0312 1112-9778 Subject The topic of the resource Nanofiltration Extraction Iron Copper membrane SNTE NF270-2540 nanofiltration heavy metals nanofiltration extraction Acier Cuivre membrane SNTE NF270-2540 nanofiltration Métaux lourds Title A name given to the resource Wastewater Purification by Nanofiltration Technology Purification des eaux usées par la technologie des nanofiltres Type The nature or genre of the resource info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Peer-reviewed Article Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource https://journals.univ-chlef.dz/index.php/natec/oai Dataset Data encoded in a defined structure. Examples include lists, tables, and databases. A dataset may be useful for direct machine processing. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource BOUGHEDIRI, Soumaia BENSLAMA, Mohamed Date A point or period of time associated with an event in the lifecycle of the resource 2022-12-19 Description An account of the resource To study the vegetation cover of a given region, we often call for the study of pollen rain. This method allows the inventory ofvegetation to be carried out during a given period. The objective of this study is to design the plant inventory of a site in the city ofAnnaba, the Christian Cemetery, based on pollen analysis. The Cemetery is a favorable place, par excellence, for the development offoam pads. These are excellent sensors for pollen and spore diversity. The latter are well preserved in their leaves thanks to a suitableacidity and humidity. Four representative samples of the spatial variability of the cemetery's environment and flora were used. Theresults obtained show that the foam pads are, on the one hand, very developed and on the other hand very rich in pollen which are inperfect state of conservation. Pollen analysis has shown a great diversity in flora, in particular51 taxa belonging to 41 families, 28 treespecies and 23 non-tree species. The pollen of Poaceae is the most dominant in the four samples, followed by the pollens of the species: Pinus sylvestris, Cupressus sempervirens, Quercu ssuber, Olea europeae and Myrica sp. The majority of the plant species existing in the plant cover of the site are manifested by the abundance of their pollens in the moss pads. The presence of "foreign" pollens has been noted in relation to different species which are not included in the cemetery's floristic inventory. The use of pollen analysis helps to define the relationships that exist between the plant inventory making up the plant cover and pollen rain. This approach to determining highly pollen-producing species in protected urban areas could be used as a predictive model, by the Ministry of Health, of periods conducive to allergies in humans. Pour étudier le couvert végétal d’une région donnée, on fait, souvent, appel à l’étude de la pluie pollinique. Cette méthode permet laréalisation de l’inventaire de la végétation pendant une période donnée. L’objectif de cette étude consiste à la conception de l’inventairevégétal d’un site de la ville d’Annaba, le Cimetière chrétien, en se basant sur l’analyse pollinique. Le Cimetière est un lieu favorable,par excellence, au développement des coussinets de mousses. Ces derniers constituent d’excellents capteurs de la diversité pollinique et des spores. Ces derniers sont bien conservés dans leurs feuilles grâce à une acidité et une humidité convenable. Ainsi, quatre échantillons représentatifs de la variabilité spatiale de l’environnement et de la flore du cimetière ont été utilisés. Les résultats obtenus montrent que les coussinets de mousses sont, d’une part, très développés et d’autre parts très riches en pollen qui sont en parfait état de conservation. L’analyse pollinique a montré une grande diversité floristique notamment51 taxons appartenant à 41 familles, 28 espèces arborescentes et 23 espèces non arborescentes. Le pollen des Poaceae est le plus dominant dans les quatre échantillons viennent ensuite les pollens des espèces : Pinus sylvestris, Cupressus sempervirens, Quercu ssuber, Olea europeae et Myrica sp. La majorité des espèces végétales existantes dans le couvert végétal du site se manifestent par l’abondance de leurs pollens dans les coussinets de mousses. La présence de pollens « étrangers » a été notée en relation avec différentes espèces qui ne figurent pas dans l’inventaire floristique du cimetière. Le recours à l’analyse pollinique contribue à définir les relations qui existent entre l’inventaire floristique composant le couvert végétal et la pluie pollinique. Cette approche de détermination des espèces très productrices du pollen, en milieu urbain protégé, pourrait être utilisée comme modèle prédictif, par le ministère de la santé, des périodes propices aux allergies chez les humains. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/87 Language A language of the resource fra Publisher An entity responsible for making the resource available Hassiba Benbouali University of Chlef Relation A related resource https://journals.univ-chlef.dz/index.php/natec/article/view/87/60 Rights Information about rights held in and over the resource Copyright (c) 2020 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/deed.en Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 12 No. 02 (2020); 54-62 Revue Nature et Technologie; Vol. 12 No 02 (2020); 54-62 2437-0312 1112-9778 Subject The topic of the resource Plant cover Floristic inventory Moss pads Pollen rain Pollen allergy Floristic inventory Pollen allergy Couvert végétal Inventaire floristique Coussinets de mousses Pluie pollinique Allergie pollinique Inventaire floristique Allergie pollinique Title A name given to the resource Pollen Rain and Floristic Inventory in the City of Annaba (Algeria) Pluie pollinique et inventaire floristique dans la ville d’Annaba (Algérie) Type The nature or genre of the resource info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Peer-reviewed Article Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource https://journals.univ-chlef.dz/index.php/natec/oai Dataset Data encoded in a defined structure. Examples include lists, tables, and databases. A dataset may be useful for direct machine processing. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource BOUHADI, Djilali HARIRI, Ahmed BENATTOUCHE, Zouaoui BELKHODJA, Hamza IBRI, Kada Date A point or period of time associated with an event in the lifecycle of the resource 2022-12-19 Description An account of the resource Our work consists of studying the improvement of the bread-making quality of soft wheat flour by using a natural product, maltflour, to enhance its value as an intermediate product, by examining its influence on the biochemical, nutritional, technological andorganoleptic behavior of the finished product. The chemical composition of bread flours (you have only studied soft wheat flour) withadded malt flour (water, fat, protein, ash, starch content) as well as the technological and functional properties (gluten, falling number,Zeleny, CHOPIN alveograph) were thus determined. The study showed that the incorporation of malt flour into wheat flour providesmore mineral salts, fat and starch and a decrease in the sedimentation index, amylase activity, swelling index "G" and deformation work "W" and an increase in tenacity "P". The breads obtained had a good volume, a good crumb texture, a fine crust and a good taste,especially for flours with 1% and 2% malt added, comparable to the control bread. Notre travail consiste à étudier l’amélioration de la qualité de panification de la farine de blé tendre (c’est le seul que vous avezétudié) par utilisation d'un produit naturel qui est la farine de malt afin de la mettre en valeur comme produit intermédiaire, et ce, enexaminant son influence sur le comportement biochimique, nutritionnel, technologique et organoleptique du produit fini. La compositionchimique des farines panifiables tel que la farine de blé tendre additionnées de la farine de malt (teneur en eau, matière grasse, protéines, cendres, amidon) ainsi que, les propriétés technologiques et fonctionnelles (gluten, indice de chute, Zeleny, alvéographe CHOPIN) ont ainsi été déterminées. L’étude a montré que l’incorporation de la farine de malt dans la farine de blé apporte plus de sels minéraux, de matière grasse et d’amidon et une diminution de l’indice de sédimentation, de l’activité amylasique, de l’indice de gonflement « G » et le travail de déformation « W » et une augmentation de la tenacité « P ». Les pains obtenus ont présenté un bon volume, une bonne texture de la mie, de la finesse de croute et un bon goût pour notamment les farines additionnées de 1 % et 2 % de malt comparable au pain témoin. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/86 Language A language of the resource fra Publisher An entity responsible for making the resource available Hassiba Benbouali University of Chlef Relation A related resource https://journals.univ-chlef.dz/index.php/natec/article/view/86/59 Rights Information about rights held in and over the resource Copyright (c) 2020 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/deed.en Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 12 No. 02 (2020); 52-62 Revue Nature et Technologie; Vol. 12 No 02 (2020); 52-62 2437-0312 1112-9778 Subject The topic of the resource Malt flour Bread Gluten Falling number Zeleny CHOPIN alveograph Malt flour Farine de malt Panification Gluten Indice de chute Zeleny Alvéographe CHOPIN Farine de maïs Title A name given to the resource Effect of Malt Flour Addition on the Functional and Technological Characteristics of Common Wheat Flour Effet de l’ajout de la farine de malt sur les caractéristiques fonctionnelles et technologiques de la farine de blé tendre Type The nature or genre of the resource info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Peer-reviewed Article Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource https://journals.univ-chlef.dz/index.php/natec/oai Dataset Data encoded in a defined structure. Examples include lists, tables, and databases. A dataset may be useful for direct machine processing. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource BENATTOUCHE, Zouaoui BOUHADI, Djilali HARIRI, Ahmed BENCHOHRA, Mokhtar Date A point or period of time associated with an event in the lifecycle of the resource 2022-12-19 Description An account of the resource The aim of the study was to evaluate the effects of thermal pasteurization at (90°C, 1mn) on physicochemical characteristics andantioxidant capacity (DPPH method) of orange juice (Citrus sinensis L, Thompson variety). Results showed (TS, pH, total acidity, totalreducing sugar and enzymatic browning index) did not change after thermal processing, whereas vitamin C and antioxidant activity(0.41± 0.01g/l and 61.53%) decreased no significantly (P ≤ 0.05) in comparison with the treated juice (0.34± 0.06 g/l and 58.9%)respectively, Such information would be helpful for establishing appropriate processing to minimize the degradation of vitamin C and antioxidant compounds. Le but de l'étude était d'évaluer les effets de la pasteurisation thermique à (90°C, 1mn) sur les caractéristiques physico-chimiques et la capacité antioxydante (méthode DPPH) du jus d'orange (Citrus sinensis L, variété Thompson). Les résultats ont montré que (TS, pH, acidité totale, sucres réducteurs totaux et indice de brunissement enzymatique) n'ont pas changé après le traitement thermique, tandis que la vitamine C et l'activité antioxydante (0,41± 0,01g/l et 61,53%) ont diminué de manière non significative (P ≤ 0,05) par rapport au jus traité (0,34± 0,06 g/l et 58,9%). respectivement, Ces informations seraient utiles pour établir un traitement approprié afin de minimiser la dégradation de la vitamine C et des composés antioxydants. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/83 Language A language of the resource eng Publisher An entity responsible for making the resource available Hassiba Benbouali University of Chlef Relation A related resource https://journals.univ-chlef.dz/index.php/natec/article/view/83/58 Rights Information about rights held in and over the resource Copyright (c) 2020 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/ Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 12 No. 02 (2020); 50-53 Revue Nature et Technologie; Vol. 12 No 02 (2020); 50-53 2437-0312 1112-9778 Subject The topic of the resource Orange juice Heat treatment Antioxidant activity Physicochemical parameters Biotechnology Jus d'orange traitement thermique activité antioxydante paramètres physico-chimiques Biotechnologie Title A name given to the resource Effect of Thermal Pasteurization on Phytochemical Characteristics and Antioxidant Capacity of Orange Juice Effet de la pasteurisation thermique sur les caractéristiques phytochimiques et la capacité antioxydante du jus d'orange Type The nature or genre of the resource info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Peer-reviewed Article Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource https://journals.univ-chlef.dz/index.php/natec/oai Dataset Data encoded in a defined structure. Examples include lists, tables, and databases. A dataset may be useful for direct machine processing. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource TAJINI, Fatma BOUALI, Yosra OUERGHUI, Abid Date A point or period of time associated with an event in the lifecycle of the resource 2022-12-19 Description An account of the resource Dates are fruits rich in biologically active substances, which gives them great interest in terms of validation. In this study we aimed at the characteristics of the fruits of two varieties of Phoenix dactylifera L., one Tunisian (Deglet Nour), was selected for its nutritional quality and its appreciation throughout the world and the other of Saudi origin. (Madjoul), which is very popular due to its large size, texture and special taste. Analyzes of biochemical parameters such as total polyphenols, flavonoids, condensed tannins, total sugars, proteins as well as trace elements (iron and sodium) indicate a significant difference in the two varieties studied. The global examination of the results of the present study show that the flavonoids represent the major constituents of phenolic compounds in the Deglet Nour Tunisian variety and the condensed tannins in the Madjoul Saudi variety (43.17 ± 4.76 μg EQ/g DW and 160.92 ± 39.22 μg EC/g DW,respectively). Similarly, the results indicate a richness in total sugars of the Madjoul date which is: 214.79 ± 15.25 mg / g DW compared to the Deglet Nour date, on the other hand the latter has the highest protein content: 15.13 ± 3.18 μg / g DW. This variation could be linked to various factors, more particularly the geographical origin, the varietal effect, the maturity and the harvest period. This comparative study could lead to valuing dates, remember that phenolic compounds are known for their biological virtues and arouse significant interest in antioxidant activity. Les dattes sont des fruits riches en substances biologiquement actives, ce qui leurs confère un grand intérêt en termes de validation. Dans cette étude nous avons visé les caractéristiques des fruits de deux variétés de Phoenix dactylifera L., l’une Tunisienne (Deglet Nour), a été sélectionnée pour sa qualité nutritionnelle et son appréciation à travers le monde et l’autre d’origine Saoudienne (Madjoul), qui est très populaire en raison de sa grande taille, de sa texture et de goût particulier. Les analyses des paramètres biochimiques tels que les polyphénols totaux, les flavonoïdes, les tanins condensés, les sucres totaux, les protéines ainsi que les oligoéléments (fer et sodium),indiquent une différence significative chez les deux variétés étudiées. L’analyse globale des résultats de la présente étude montrent que les flavonoïdes représentent les constituants majeurs des composés phénoliques chez la variété Deglet Nour Tunisienne et les tanins condensés chez la variété Madjoul Saoudienne (43,17 ± 4,76 μg EQ /g MS et 160,92 ± 39,22 μg EC /g MS, respectivement). De même, les résultats indiquent une richesse en sucres totaux de la datte Madjoul qui est de : 214,79 ± 15,25 mg/g MS par rapport à la datte Deglet Nour, par contre cette dernière présente la teneur la plus élevée en protéine : 15,13 ± 3,18 μg/g MS. Cette variation pourrait être liée à divers facteurs, plus particulièrement l'origine géographique, l’effet variétal, la maturité et la période de la récolte. Cette étude comparative pourra conduire à valoriser les dattes, rappelons que les composés phénoliques sont connus pour leurs vertus biologiques et suscitent un intérêt important dans l’activité antioxydante. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/78 Language A language of the resource fra Publisher An entity responsible for making the resource available Hassiba Benbouali University of Chlef Relation A related resource https://journals.univ-chlef.dz/index.php/natec/article/view/78/56 Rights Information about rights held in and over the resource Copyright (c) 2020 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/ Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 12 No. 02 (2020); 39-49 Revue Nature et Technologie; Vol. 12 No 02 (2020); 39-49 2437-0312 1112-9778 Subject The topic of the resource Biochemical characteristics Deglet Nour Madjoul Bioactive molecules Phoenix dactylifera L. Deglet Nour Caractéristiques biochimiques Deglet Nour Madjoul Molécules bioactives Phoenix dactylifera L. Deglet Nour Title A name given to the resource Study of the Nutritional Quality of Phoenix dactylifera L. fruit: Measurement of Biochemical Parameters Etude de la qualité nutritionnelle de fruit de Phœnix dactylifera L. : mesure des paramètres biochimiques Type The nature or genre of the resource info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Peer-reviewed Article Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource https://journals.univ-chlef.dz/index.php/natec/oai Dataset Data encoded in a defined structure. Examples include lists, tables, and databases. A dataset may be useful for direct machine processing. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource DAHAMNI, Salim GUETARNI, Hayet BENAROUS, Abdallah Date A point or period of time associated with an event in the lifecycle of the resource 2022-12-19 Description An account of the resource Heat pipes have applications in several areas of thermal engineering, including electronic components to spacecraft thrust chamber exchangers. Although they can transfer large amounts of heat over a spatially restricted interval, they exhibit several operating limitations. The properties of the working fluid, the capillary structure, the orientation of the pipe, the length and the diameter of the pipe, are parameters that affect these limits. The present study aims to numerically evaluate the heat transfer capacity of a heat pipe. A one-dimensional model is developed considering water, ammonia and sodium as working fluids. The capillary structure is taken to be awire mesh wick or a square groove, for which several operating thermal ranges are investigated. A comparative study for different properties of heat pipes has been performed using the Matlab® software. Les caloducs trouvent leurs applications dans plusieurs domaines de l’ingénierie thermique, allant des composants électroniques jusqu’aux échangeurs des propulseurs d’engins spatiaux. Bien qu'ils puissent transférer de grosses quantités de chaleur sur un court intervalle, ils possèdent des limites d'exploitation. Les propriétés du fluide de travail, la structure capillaire, l'orientation du tube, la longueur et le diamètre du tube, en sont des paramètres qui affectent ces limites. La présente étude vise à évaluer numériquement la capacité du transfert thermique d’un caloduc, par élaboration d’un modèle unidimensionnel. L’eau, l’ammoniac et le sodium sont utiliséscomme fluides de travail, associés à une structure capillaire de type mèches tissées ou de type rainures carrées et étudiés pour différentes gammes de température de fonctionnement. Des routines développées en Matlab® , utilisées pour tester des configurations typiques pour lesquelles une analyse comparative, est conduite. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/77 Language A language of the resource fra Publisher An entity responsible for making the resource available Hassiba Benbouali University of Chlef Relation A related resource https://journals.univ-chlef.dz/index.php/natec/article/view/77/55 Rights Information about rights held in and over the resource Copyright (c) 2020 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/ Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 12 No. 02 (2020); 28-38 Revue Nature et Technologie; Vol. 12 No 02 (2020); 28-38 2437-0312 1112-9778 Subject The topic of the resource Electronics cooling Heat pipe Heat transfer limit Working fluid Capillary structure Caloduc Refroidissement des composants électroniques Caloduc Limites de transfert de chaleur Fluide de travail Structure capillaire Caloduc Title A name given to the resource Effects of the Working Fluid Nature and the Capillary Structure on the Thermal Capacity of a Heat Pipe Effets de la nature du fluide de travail et de la structure capillaire sur la capacité thermique d’un caloduc Type The nature or genre of the resource info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Peer-reviewed Article Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Title A name given to the resource https://journals.univ-chlef.dz/index.php/natec/oai Dataset Data encoded in a defined structure. Examples include lists, tables, and databases. A dataset may be useful for direct machine processing. Dublin Core The Dublin Core metadata element set is common to all Omeka records, including items, files, and collections. For more information see, http://dublincore.org/documents/dces/. Creator An entity primarily responsible for making the resource BELOUFA, Amine AMIRAT, Mohamed Date A point or period of time associated with an event in the lifecycle of the resource 2022-12-19 Description An account of the resource In the hybrid or electric vehicle, the high demand for electric power requires the use of high electric current; the power automotive connector should resist this increase of electric current in order to avoid serious damage caused by the increase in contact temperature by the Joule effect. The objective of this article is to analyze experimentally and numerically the effect of the variation in the cable diameter on the decrease in contact temperature. For this reason, a finite element model has been developed to calculate the numerical values of the contact temperature for several cable diameters and several electric currents. In addition, experimental tests have been carried out to validate this numerical model. The results show that the influence of the cable section on the contact temperature is never neglected. Dans le véhicule hybride ou électrique, la puissance électrique élevée demande un courant électrique élevé, le connecteurd’automobile de puissance devrait résister alors à cette augmentation du courant électrique afin d'éviter des dommages sérieux causéspar l'augmentation de la température de contact par l’effet de Joule. Le but de cet article est d'analyser expérimentalement et numériquement l'effet de la variation de diamètre du câble sur la diminution de la température de contact. Pour cette raison, un modèle d'éléments finis a été développé pour calculer la température de contact numérique pour plusieurs diamètres de câble et plusieurs courants électriques. De plus, des essais expérimentaux ont été réalisés pour valider ce modèle numérique. Les résultats montrent que l'influence de diamètre du câble sur la température de contact n'est jamais négligée Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/76 Language A language of the resource fra Publisher An entity responsible for making the resource available Hassiba Benbouali University of Chlef Relation A related resource https://journals.univ-chlef.dz/index.php/natec/article/view/76/54 Rights Information about rights held in and over the resource Copyright (c) 2020 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/ Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 12 No. 02 (2020); 12-27 Revue Nature et Technologie; Vol. 12 No 02 (2020); 12-27 2437-0312 1112-9778 Subject The topic of the resource Power connector Cable diameter Experimental tests Joule effect Contact resistance Contact temperature Finite element analysis Electric vehicle Connecteur de puissance Diamètre du câble Tests expérimentaux Effet Joule Température et résistance de contact Analyse éléments finis Véhicule hybrique Title A name given to the resource Study of the Cross-section Influence of the Power cable on the Temperature of the Power Contacts Etude de l’influence de la section du câble d’alimentation sur la température des contacts de puissance Type The nature or genre of the resource info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Peer-reviewed Article