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Collection: https://journals.univ-chlef.dz/index.php/natec/oai

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Evaluation de la qualité physico chimique d’un jus de fruit soumis à quelques traitements thermiques durant sa conservation: Evaluation of the physico-chemical quality of a fruit juice subjected to some thermal treatments during its conservation

Cette étude consiste d’abord à évaluer les qualités : organoleptique, physico chimiques, nutritionnelle et microbiologique de quatre types de jus de fruits, et d’évaluer leurs caractéristiques après un traitement de pasteurisation et pendant leurs…

INHIBITION DE L’OXYDATION DE L’HUILE DE TOURNESOL PRODUITE EN ALGERIE PAR LES PRODUITS DE MAILLARD: Inhibition of Sunflower oil oxidation produced in Algeria by Maillard's products

Depuis sa mise en évidence, la réaction de Maillard a été utilisée depuis de très nombreuses années pour produire des aliments qui paraissent attractifs pour les consommateurs ; elle peut conduire à la formation de couleur, favoriser la formation de…

Composting-methanization of solid urban bio-waste from the municipality of Chlef (Algeria)

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…

Diet of the rough Acanthodactyl (Acanthodactylus boskianus) in the coastal habitats of the Gabes region

The knowledge of the diet of animals in their natural environment is a prerequisite for understanding their biology and ecology. Thus the aim of this study was to describe the diet of the Bosk’s Fringe-toed lizards Acanthodactylus boskianus, one of…

Diet Of Little Egret (egretta garzetta) Chicks In The Boughrara Lagoon (Southeastern Tunisia): Prey Selection and Effect of Chicks Age

This work aimed at investigating the diet of Little Egret (Egretta garzetta) chicks in a breeding colony at the Boughrara Lagoon, insoutheastern Tunisia. Using the regurgitate analysis method; we described the diversity of preys consumed by the…

Contribution to the domestication of indigenous Fabaceae species of Burundi: Entada abyssinica seedling production

In Burundi, species used in reforestation are quasi-exclusively exotic. Indigenous species and their ecosystems arecontinuously being degraded due to demographic pressure. It is crucial to domesticate indigenous species particularlythose with…

Risques de désertification : Sensibilité et limites de la méthode Medalus dans les zones semi-arides (centre de la Tunisie).

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…

Elaboration and characterization of a composite material based on unsaturated polyester resin (UPR) reinforced with perlite

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…

Impact of the regression of rangelands on the evolution of breeding systems in Northwest Tunisia

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…

Numerical Modeling of an Elastic Spherical Contact under Combined Normal and Tangential Loading

The Contact between two surfaces with normal and tangential force involve friction dissipation phenomenon .Thefriction phenomenon can be formulated as a constitutive relation in a similar form to that of the elasto-plasticconstitutive equation of…

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