1 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/. Contributor An entity responsible for making contributions to the resource indexa Title A name given to the resource journals Website A resource comprising of a web page or web pages and all related assets ( such as images, sound and video files, etc. ). Local URL The URL of the local directory containing all assets of the website https://lbev-univlome.com/revue-ecosysteme-et-paysage/ 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/. Contributor An entity responsible for making contributions to the resource https://lbev-univlome.com/revue-ecosysteme-et-paysage/ Language A language of the resource Francais Date Created Date of creation of the resource. 2021 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 Aoufoh , KOFFI N'DERE Kokouvi , Bruno KOKOU Wouyo , ATAKPAMA Bimare , KOMBATE Hodabalo, EGBELOU Madjouma , KANDA Komlan, BATAWILA Date A point or period of time associated with an event in the lifecycle of the resource 2024-02-26 Description An account of the resource In recent years, Togo's protected areas have been subject to a worrying process of anthropisation. This has led to a decline in forest ecosystems, their biodiversity and their functions. The general objective of this study is to assess the state of conservation of the classified forest of Amou-Mono between 1986 and 2021. More specifically, it aims to: (i) characterize the dynamics of land use from 1986, 2000, 2013 and 2021 and, (ii) assess the impact of changes in land use on the potential for carbon sequestration. A multi-date classification of Landsat images for the years 1986, 2000, 2013 and 2021 made it possible to quantify and assess changes in occupation. The dynamics of land use between 1986 and 2021 is mainly reflected by a regression of dense/riparian forests (81.40%) and open forests/wooded savannahs (67.79%) and the progression of wooded/shrubby Savannah (172.93%). Anthropogenic formations: Fields/fallow and Agglomerations/Bare soils, absent in 1986, occupy in 2021 respective proportions of 38.1 % and 2.19%. Human activities, particularly logging and agricultural clearing, are causing fragmentation and regression of forest ecosystems. Unless action is taken to reverse the trend, the conservation of biodiversity and ecosystem functions in this classified forest will be increasingly threatened. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/163 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/163/144 Rights Information about rights held in and over the resource Copyright (c) 2024 Revue Nature et Technologie https://creativecommons.org/licenses/by/4.0 Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 16 No. 01 (2024); 51-62 Revue Nature et Technologie; Vol. 16 No 01 (2024); 51-62 2437-0312 1112-9778 Title A name given to the resource Empreinte anthropique sur la dynamique des écosystèmes de la forêt classée d’Amou-Mono au Togo: Anthropogenic impact on ecosystem dynamics in the Amou-Mono classified forest in Togo 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 Dominique , AGANZE MULUME Daniel , BUCHAGUZI MUZUSANGABO Janvier, MUGISHO ZIRHUMANA Thomas , BRIGATTI Sage , WEREMUBI MWISHA Orthence , KANYERE KAZIGE Jacques , KALUMUNA BARHASHISHWA Pascal, NSAMBU MUKONDUASUMU Date A point or period of time associated with an event in the lifecycle of the resource 2024-01-31 Description An account of the resource The present study was conducted to investigate the effects of acid preservatives (AP) and food hydrocolloids (FH) on the shelf life of raw milk at room temperature (between 20 to 25°C). Raw milk samples were treated with different doses of acid preservatives (citric acid: E330 and ascorbic acid: E300) and food hydrocolloids (food agar-agar: E406 and starch: E1400) to determine the optimal dose that could prolong the shelf life of raw milk while maintaining its physicochemical, microbiological, and organoleptic quality. The results showed that the acid preservatives helped preserve the microbiological quality of the milk samples without significant effects on the final pH values. The food hydrocolloids prevented milk coagulation in the presence of acids only when applied at a dose ≤ 0.3 g in 100 mL of milk. Citric acid was more effective than ascorbic acid, while food agar-agar (E406) was the best food hydrocolloid. Acid preservatives and food hydrocolloids can be effective tools for prolonging the shelf life of raw milk at room temperature and improving food safety and nutrition in regions where raw milk preservation is a challenge. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/159 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/159/125 Rights Information about rights held in and over the resource Copyright (c) 2024 Revue Nature et Technologie https://creativecommons.org/licenses/by/4.0 Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 16 No. 01 (2024); 01-17 Revue Nature et Technologie; Vol. 16 No 01 (2024); 01-17 2437-0312 1112-9778 Title A name given to the resource Efficacité des conservateurs acides et hydrocolloïdes alimentaires sur la durée de conservation du lait cru à température ambiante: Effectiveness of food acid and hydrocolloid additives on the shelf life of raw milk at room temperature 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 Oumayma, HAMMAMI Mustpha, MANSOURI Moncef, KHTIRI Ali, FERCHICHI Date A point or period of time associated with an event in the lifecycle of the resource 2023-06-30 Description An account of the resource The pastures of northwestern Tunisia have undergone several changes over the last decades.  The main results are the decrease in rangelands, the increase in the total animal load, the increase in the cultivated land, the increase in the production costs particularly the purchase of concentrated feeds, and the low subsidies from the state. All these factors are changing the livestock system, mainly dairy cows. The present study, therefore, sought to characterize farm household systems that seem to be currently adapted in the Sejnane plain using a typology. We focus on understanding the variables that contribute to raising farmers' choice of breeding system in the study area. We interviewed 44 farmers. Furthermore, we analyzed their responses using descriptive statistics, ascending hierarchical classification AMP and principal components analysis PCA. The results show that four types of livestock systems could be characterized, depending on pasture and production. Moreover, they suggest that landless pastoralists are more vulnerable than agro-pastoralists. Les pâturages du nord-ouest de la Tunisie ont subi plusieurs changements au cours des dernières décennies. Les principaux résultats sont la diminution des terres de parcours, l'augmentation de la charge animale totale, l'augmentation des terres cultivées, l'augmentation des coûts de production, en particulier l'achat d'aliments concentrés, et les faibles subventions de l'État. Tous ces facteurs modifient le système d'élevage, principalement celui des vaches laitières. La présente étude a donc cherché à caractériser les systèmes des ménages agricoles qui semblent actuellement adaptés dans la plaine de Sejnane à l'aide d'une typologie. Nous nous concentrons sur la compréhension des variables qui contribuent à augmenter le choix du système d'élevage par les agriculteurs dans la zone d'étude. Nous avons interrogé 44 agriculteurs. En outre, nous avons analysé leurs réponses à l'aide de statistiques descriptives, d'une classification hiérarchique ascendante AMP et d'une analyse en composantes principales ACP. Les résultats montrent que quatre types de systèmes d'élevage peuvent être caractérisés, en fonction des pâturages et de la production. En outre, ils suggèrent que les éleveurs sans terre sont plus vulnérables que les agro-éleveurs. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/156 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/156/118 Rights Information about rights held in and over the resource Copyright (c) 2023 Revue Nature et Technologie https://creativecommons.org/licenses/by/4.0 Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 15 No. 02 (2023); 39-46 Revue Nature et Technologie; Vol. 15 No 02 (2023); 39-46 2437-0312 1112-9778 Title A name given to the resource Impact of the regression of rangelands on the evolution of breeding systems in Northwest Tunisia Impact de la régression des parcours sur l'évolution des systèmes d'élevage dans le Nord-Ouest de la Tunisie 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 Guidawa, FAWA Pierre Marie, MAPONGMETSEM Ronald, BELLEFONTAINE Date A point or period of time associated with an event in the lifecycle of the resource 2023-07-06 Description An account of the resource Ximenia americana, Vitex doniana and Lophira lanceolata are species prized by the populations of the Guinean savannah highlands of Cameroon. They are unfortunately still in the wild where they are subjected to various pressures. From the perspective of the conservation and enhancement of local biodiversity, their domestication appears necessary. The objective of the work is to study the vegetative propagation by air layering of these fruit trees. The experimental device used is a split-split-plot with three repetitions. Species represents the main treatment; the substrates constitute the secondary treatment while the covering of the layers with aluminum foil represents the tertiary treatment. The experimental unit was 30 layers. The rooting rate of layers varies significantly (0.000<0.001) from 48.88±1.89% in Ximenia americana to 81.38±2.08% in Lophira lanceolata. Sphagnum was the best substrate with 69.63±1.38% against 61.66±1.54% for the black soil-sawdust mixture. The analysis of variance reveals a significant difference for the substrates (0.0025<0.01). Covering the layers with aluminum foil presented a rate of 69.44±2.15% while the uncovered layers presented 61.85±1.54%, the analysis of variance shows a significant difference (0,0031<0.01). Lophira lanceolata exhibited the best air layering ability; the rooted layers were weaned and acclimatized for two months before being transferred to the field. During this process 19% and 52% respectively of the layers of Vitex doniana and Ximenia americana flowered. This inexpensive technique is an essential step in the process of their domestication. Ximenia americana, Vitex doniana et Lophira lanceolata sont des espèces prisées par les populations de la savane guinéenne des hauts plateaux du Cameroun. Elles sont malheureusement encore à l'état sauvage où elles sont soumises à diverses pressions. Dans une perspective de conservation et de valorisation de la biodiversité locale, leur domestication apparaît nécessaire. L'objectif de ce travail est d'étudier la multiplication végétative par marcottage aérien de ces arbres fruitiers. Le dispositif expérimental utilisé est un split-split-plot avec trois répétitions. L'espèce représente le traitement principal ; les substrats constituent le traitement secondaire tandis que le recouvrement des couches par du papier d'aluminium représente le traitement tertiaire. L'unité expérimentale était de 30 couches. Le taux d'enracinement des couches varie significativement (0,000<0,001) de 48,88±1,89% chez Ximenia americana à 81,38±2,08% chez Lophira lanceolata. La sphaigne est le meilleur substrat avec 69,63±1,38% contre 61,66±1,54% pour le mélange terre noire-sciure. L'analyse de variance révèle une différence significative pour les substrats (0,0025<0,01). La couverture des couches par une feuille d'aluminium a présenté un taux de 69,44±2,15% alors que les couches non couvertes ont présenté 61,85±1,54%, l'analyse de la variance montre une différence significative (0,0031<0,01). Lophira lanceolata a montré la meilleure capacité de marcottage à l'air ; les couches enracinées ont été sevrées et acclimatées pendant deux mois avant d'être transférées au champ. Au cours de ce processus, 19 % et 52 % respectivement des couches de Vitex doniana et de Ximenia americana ont fleuri. Cette technique peu coûteuse est une étape essentielle dans le processus de domestication de ces plantes. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/154 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/154/117 Rights Information about rights held in and over the resource Copyright (c) 2023 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/deed.fr Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 15 No. 02 (2023); 47-55 Revue Nature et Technologie; Vol. 15 No 02 (2023); 47-55 2437-0312 1112-9778 Title A name given to the resource Air layering of three agroforestry species in the Guinean savannah highlands of Adamawa in Cameroon 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 Adam Camille , KOUAME Kouabena , KREMAN Kouakou Eugène , KOUADIO Kalo Laciné , BAMBA Gouagoua Severin, KOUADJA Date A point or period of time associated with an event in the lifecycle of the resource 2023-07-06 Description An account of the resource The substitution of maize in poultry feed by the incorporation of cassava peel meal is mainly aimed at reducing the production cost of the feed while covering all the nutritional requirements of the hens. This study highlights the nutritional composition of eggs from hens fed a feed containing cassava peel meal. Specifically, the effects of incorporating cassava peel meal at increasing rates on the nutritional value of the hens' eggs were assessed, and subsequently, the presence of hydrocyanic acid in these eggs from the peel was investigated. The meal is incorporated at rates of 0 %, 10 %, 20 % and 30% respectively into chicken feeds. Proximal analyses are performed on 30 eggs from each feed. These eggs contained (7.7-8.4 g/100g) fat, (11.87-12.8 g/100g) protein, (2.2-2.8 g/100g) carbohydrate, (0.3-0.4 g/100g) fiber and (0.83-0.89 g/100g) ash. These contents are similar to those of chicken eggs in general, regardless of the level of incorporation, and the hydrocyanic acid content is almost zero. La substitution du maïs dans l’alimentation de volaille par l’incorporation de la farine de manioc vise surtout à réduire le coût de production de l’aliment tout en couvrant l’ensemble des besoins nutritionnels des poules. Cette étude met en évidence la composition nutritionnelle des œufs de poules nourries avec un aliment contenant de la farine d’épluchures de manioc. Il s’agit surtout, d’évaluer les effets de l’incorporation de la farine d’épluchures de manioc à des taux croissants sur la valeur nutritionnelle des œufs de poules, puis de rechercher la présence d’acide cyanhydrique dans ces œufs. La farine est incorporée à des taux de 0 % ; 10 % ; 20 % et 30 % respectivement dans les aliments pour poulets. Des analyses proximales sont réalisées sur 30 œufs issus de chaque aliment. Les résultats obtenus montrent que les œufs contiennent (7,7 à 8,4 g/100g) de lipides, (11,87 à 12,8 g/100g) de protéines, (2,2 à 2,8 g/100g) de glucides, (0,3 à 0,4 g/100g) de fibres et (0,83 à 0,89 g/100g) de cendres. Ces teneurs sont similaires à celles des œufs de poules en général quel que soit le niveau d’incorporation, et les teneurs en acide cyanhydrique y sont quasiment nulles. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/153 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/153/116 Rights Information about rights held in and over the resource Copyright (c) 2023 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/deed.fr Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 15 No. 02 (2023); 31-38 Revue Nature et Technologie; Vol. 15 No 02 (2023); 31-38 2437-0312 1112-9778 Title A name given to the resource Effect of incorporating cassava peel flour on the physico-chemical and nutritional quality of hens' eggs"ISA BROWN" Effet de l’incorporation de la farine d’épluchures de manioc sur la composition physico-chimique et nutritionnelle des œufs de poule "ISA BROWN" 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 Naïma , TAHRAOUI DOUMA Nacéra, CHAOUTI Amina, FELLOUH Serge, CHAMBON Date A point or period of time associated with an event in the lifecycle of the resource 2023-07-06 Description An account of the resource In Chlef, the management of urban solid bio-waste is limited to "all in controlled landfill or in wild landfill". This bio-waste can be treated by composting-methanization. With this in mind, two temperature regimes were chosen, the mesophilic regime (35°C) and the thermophilic regime (55°C). The choice of a neutral pH is an optimal value indicating the stability and the good progress of the anaerobic digestion. As well as monitoring the parameters of the composting process. The results of the composting process show that the values of temperature (35°C to 62°C), pH (5 to 8), moisture content (60% and 40%) and percentage of organic matter (74% to 41%) indicate that the fermentation process is going well. The composting process enters the cooling phase after 60th day of fermentation. While the results of the methanization show that a substrate with an organic matter content of 73% causes an accumulation of acids in the digester and a stop of the reaction in mesophilic conditions. Therefore, the thermophilic mode is more suitable for the anaerobic degradation of raw bio-waste. The tests were conclusive in obtaining a flammable biogas. The values of the VFA (Volatile Fatty Acid)/ACT (Alkalimetric Title) ratios below 0.1 show the good functioning of the anaerobic digestion. The methanization of two masses of substrate at the beginning and during the cooling phase of composting allows a gain in residence time, thus a lower energy cost. A Chlef, la gestion des bio-déchets solides urbains se limite à « tout à la décharge contrôlée ou sauvage». Ces bio-déchets peuvent être traités par compostage-méthanisation. Dans cette optique, deux régimes de températures ont été choisis, le régime mésophile (35 °C) et le régime thermophile (55 °C). Le choix d’un pH neutre, est une valeur optimale indiquant la stabilité et le bon déroulement de la digestion anaérobie. Ainsi qu’un suivi des paramètres du processus de compostage. Les résultats du compostage, montrent que les valeurs de la température (35 °C à 62 °C), du pH (5 à 8), le taux d’humidité (60 % et 40 %) et le pourcentage de la matière organique (74 % à 41 %) montrent le bon déroulement de la fermentation. Le compostage rentre en phase de refroidissement au bout du 60ème jour de fermentation. Alors, que les résultats de la méthanisation montrent qu’un substrat dont, le taux en matière organique de 73 % provoque une accumulation d’acides dans le digesteur et un arrêt de la réaction dans des conditions mésophiles. Donc, le mode thermophile est plus approprié pour la dégradation anaérobie des biodéchets bruts. Les tests étaient concluants par l’obtention d’un biogaz inflammable. Les valeurs des rapports AGV/TAC inférieur à 0,1 montrent le bon fonctionnement de la méthanisation. Le méthanisation de deux masses du substrat au début et au cours de la phase de refroidissement du compostage permet un gain de temps de séjour, donc un coût moindre en énergie. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/152 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/152/115 Rights Information about rights held in and over the resource Copyright (c) 2023 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/deed.fr Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 15 No. 02 (2023); 17-30 Revue Nature et Technologie; Vol. 15 No 02 (2023); 17-30 2437-0312 1112-9778 Title A name given to the resource Composting-methanization of solid urban bio-waste from the municipality of Chlef (Algeria) Compostage-méthanisation des fermentescibles solides urbains de la commune de Chlef (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 Ouided, DEHAS Laidi, BABOURI Yasmina, BISKRI Date A point or period of time associated with an event in the lifecycle of the resource 2023-07-06 Description An account of the resource The main objective of this work is the study of the effect of the incorporation of a mineral charge, perlite, in a thermosetting matrix based on an unsaturated polyester resin, of the isophthalic resin type, on the mechanical, physical and morphological properties of composite materials containing various rates of minerals, having different dimensions, in particular higher than 50 µm and lower than 50 µm, treated and not treated. The composites were prepared by the contact molding process. The study of the mechanical properties, carried out by determining the stress at break and strain at break, impact resistance and fracture resistance, showed that these properties increase up to 4 % due to the strong affinity between the two components and the good dispersion of the filler; then, decrease when the content of the filler increases which does not allow an adequate dispersion and creates agglomerations that initiate the break. A good correlation was observed between the results of the mechanical tests and the SEM observations, which reveal that for lower concentrations, the perlite particles are well dispersed in the resin, but also the evidence of agglomerations when the filler content increases L’objectif principal de ce travail est l’étude de l’effet de l’incorporation d’une charge minérale, la perlite dans une matrice thermodurcissable à base d’une résine polyester insaturée, de type résine isophtalique, sur les propriétés mécaniques, physique et , morphologique  des matériaux composites comportant des taux variés de minerais, présentant différentes dimensions, notamment supérieure à 50µm, et inférieure à 50µm traité et non traité. Les composites ont été préparés par le procédé de moulage au contact ; Les plaques des  composites sont durcies pendant 24 h à la température ambiante puis mises en étuve pendant 16 heures à 40 °C pour subir une post-cuisson. L’étude de propriétés mécaniques réalisées par la détermination de la contrainte à la rupture et la déformation à la rupture, la résistance à l'impact  et la résistance à la rupture  a montré que ces propriétés augmentent jusqu'à 4% en raison de la forte affinité entre les deux composants et de la bonne dispersion de la charge. Après, ils diminuent lorsque la teneur de la charge augmente et cela ne permettent pas une dispersion adéquate et crée des agglomérations  qui initient la rupture. Une bonne corrélation a été observée entre les résultats des essais  mécaniques  et les observations au MEB qui a révélé que pour des concentrations plus faibles, les particules de la perlite sont bien dispersés dans la résine, mais les agglomérations sont mises en évidence lorsque la teneur en charge augmente. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/151 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/151/114 Rights Information about rights held in and over the resource Copyright (c) 2023 Nature & Technology Journal https://creativecommons.org/licenses/by/4.0/deed.fr Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 15 No. 02 (2023); 01-16 Revue Nature et Technologie; Vol. 15 No 02 (2023); 01-16 2437-0312 1112-9778 Title A name given to the resource Elaboration and characterization of a composite material based on unsaturated polyester resin (UPR) reinforced with perlite Elaboration et caractérisation d’un matériau composite à base de résine polyester insaturée (UPR) renforcé avec la perlite 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 ABDOUN, Manel BOUGARA, Abdelkader BELDJILALI, Said AZZOUZ HENNI, El-Houaria Date A point or period of time associated with an event in the lifecycle of the resource 2023-01-30 Description An account of the resource The recycling of some of the waste is an important issue and very necessary to protect the environment and provide new sources of supply of raw materials. In this experimental research, a solution is suggested to recover the bulky waste, like the waste tire, in the form of aggregates used in the concrete industry. The work performed consists in incorporating used tires as aggregates by partial replacement of the sand in the preparation of sample mortars using different percentages of substitutions in volume varying from 0% to 50%. Physico-mechanical tests were carried out on the mortar mixes. The results obtained show that the use of waste tires as aggregates in the production of mortars can solve several problems related to their disposal and save natural resources related to the extraction of aggregates. Also, the results found show that the waste tires can be used to produce mortars employed for structural and non-structural applications. Le recyclage de certains déchets est une question importante et très nécessaire pour préserver l'environnement et garantir de nouvelles sources d'approvisionnement en matières premières. Dans cette recherche expérimentale, une solution est proposée pour récupérer les déchets encombrants, comme les déchets de pneus, sous forme de granulats dans l'industrie du béton. Le travail réalisé consiste à intégrer les pneus usagés comme granulats par remplacement partiel du sable dans la confection d’un mélange de mortier suivant des pourcentages de substitutions en volume variant de 0 % à 50 %. Des essais de caractérisation physico-mécaniques ont été effectués sur des éprouvettes de mortier de dimension 4×4×16 cm3. Les résultats obtenus montrent que l'utilisation de déchet de pneus comme granulats dans la confection du mortier peut résoudre beaucoup de problèmes liés à leur élimination et économiser les ressources naturelles liées à l'extraction des granulats. Aussi, les résultats trouvés montrent qu’il est possible d’utiliser les déchets de pneus dans la fabrication de mortiers destinés pour des applications structurelles et non structurelles. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/149 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/149/112 Rights Information about rights held in and over the resource https://creativecommons.org/licenses/by/4.0 Source A related resource from which the described resource is derived Revue Nature et Technologie; Vol. 15 No. 01 (2023); 11-21 Revue Nature et Technologie; Vol. 15 No 01 (2023); 11-21 2437-0312 1112-9778 Title A name given to the resource Use of waste tires to produce mortars Utilisation de déchet de pneus dans la confection des mortiers 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 ATTRASSI, Khaled Date A point or period of time associated with an event in the lifecycle of the resource 2023-01-30 Description An account of the resource Citrus fruits are harvested at the beginning of ripening to maximize the shelf life and marketing period. However, prolonged storage of citrus exposes them to various conditions that may be of physiological origin, often related to cold, or of parasitic origin, mainly fungal diseases. Not all fruits entering the conservation station become marketable, resulting in financial losses in addition to transportation and storage costs. The physiological study of the effect of two culture media (Malt Extract Agar (MEA) and  Patato dexstrose Agar (PDA)) on the mycelial growth of four fungal species (Penicillium italicum, Penicillium digitatum, Aspergillus niger and Acremonium sp.) isolated from rotten citrus fruits in storage showed that both environments are favorable to the development of these fungi. Les fruits d’agrumes sont récoltés en début de maturation pour maximiser la durée de conservation et la période de mise en marché. Toutefois, une conservation prolongée des agrumes les exposent à différentes affections qui peuvent être d’origine physiologique liées le plus souvent au froid, ou d’origine parasitaire, pour l’essentiel des maladies fongiques. Les fruits qui entrent en station de conservation ne deviennent pas tous commercialisables, d’où des pertes financières qui s’ajoutent aux coûts de transport et de stockage. L’étude physiologique de l’effet de deux milieux de culture (Malt Extract Agar (MEA) et  Patato dexstrose Agar (PDA)) sur la croissance mycélienne de quatre espèces fongiques (Penicillium italicum, Penicillium digitatum, Aspergillus niger et Acremonium sp.) isolées des fruits d’agrumes pourris en conservation a montré que les deux milieux sont favorables au développement de ces champignons. Identifier An unambiguous reference to the resource within a given context https://journals.univ-chlef.dz/index.php/natec/article/view/148 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/148/111 Rights Information about rights held in and over the resource Copyright (c) 2023 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. 15 No. 01 (2023); 22-28 Revue Nature et Technologie; Vol. 15 No 01 (2023); 22-28 2437-0312 1112-9778 Title A name given to the resource Physiological study of the rotting of citrus fruits in conservation in some markets of Kenitra (Moroccan city) Étude physiologique de la pourriture des fruits d’agrumes durant la conservation dans quelques marchés de Kenitra (ville marocaine) Type The nature or genre of the resource info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article Peer-reviewed Article