https://dspace.univ-ouargla.dz/jspui/handle/123456789/27590 2026-04-19T07:29:48Z 2026-04-19T07:29:48Z MEHELLOU Zineb YOUMBAI Asma BOUAL Zakaria GARDARIN Christine PIERRE Guillaume DELATTRE Cédric MICHAUD Philippe OULD EL HADJ Med Didi https://dspace.univ-ouargla.dz/jspui/handle/123456789/31606 2022-12-15T10:42:23Z 2022-06-30T00:00:00Z

Titre: EFFET HEPATO-PROTECTEUR D’EXTRAITS BRUTS DE POLYSACCHARIDES DE FEUILLES D’Oudneya africana R. Br. (BRASSICACEAE) SUR L'INFLAMMATION AIGUË INDUITE PAR L'ACETATE DE PLOMB CHEZ DES RATS Wistar albino Auteur(s): MEHELLOU Zineb; YOUMBAI Asma; BOUAL Zakaria; GARDARIN Christine; PIERRE Guillaume; DELATTRE Cédric; MICHAUD Philippe; OULD EL HADJ Med Didi Résumé: This work focuses on the study of polysaccharides from the leaves of Oudneya africana R. Br. (Brassicaceae), a spontaneous plant with a medicinal character harvested in the region of M'Rara wilaya of El Oued (northern Algerian Sahara). The extraction of water-soluble polysaccharides (PHOA) gave a mass yield of 7.24%. The determination of the composition of PHOA obtained, by colorimetric assays, indicates levels of 50.63±0.07% in total sugars, 47.95±0.002% in neutral sugars and 21.20±0.001% in proteins. Analysis of the monosaccharide composition by high performance anion exchange chromatography coupled with a pulsed amperometric detector (HPAEC-PAD) found the presence of L-arabinose (11.4%), D-galactose (13.3%), D-glucose (19.7%), D-mannose (46%), D-galacturonic acid (8.3%), and D-glucuronic acid (1%). The study of the hepatoprotective activity of the extract is carried out in vivo on male and female rats of the Wistar albino strain by oral poisoning with lead acetate. At a concentration of 100mg/kg, the PHOA fraction shows antioxidant activity by significant suppression of the increase in malondialdehyde (MDA) levels and the decrease in reduced glutathione (GSH) levels in liver and kidney tissues observed after exposure to lead. Histopathological analysis of the livers indicates that PHOA has a hepatoprotective effect in female rats while they note a decrease in the intensity of hepatotoxicity in males, which makes them a potential agent for the prevention of liver damage Description: Algerian journal of arid environment

2022-06-30T00:00:00Z HILI Aïman JAA Farid REDDAD Hanane BOUSSENA Ayoub https://dspace.univ-ouargla.dz/jspui/handle/123456789/31605 2022-12-15T10:34:27Z 2022-06-30T00:00:00Z

Titre: APPORT DES OUTILS GEOSPATIALES A L’ETUDE DE LA DYNAMIQUE SPATIO-TEMPORELLE DE LA FORET D’AÏT BOUZID (HAUT ATLAS CENTRAL, MAROC) Auteur(s): HILI Aïman; JAA Farid; REDDAD Hanane; BOUSSENA Ayoub Résumé: The present work presents the results of the study of the spatio-temporal dynamics of the Aït Bouzid forest between 1984 and 2019 (35 years), based on remote sensing and GIS tools. In fact, our study area covers an area of 12'060 ha, its location in the central High Atlas (near Lake Bine El Ouidane) gives it several favorable conditions for a very remarkable dynamic. In order to study these dynamics, we used Landsat (1984 and 2001) and Oli (2019) satellite images to study the evolution and spatialization of the Aït Bouzid forest for a period of 35 years. Analysis of the database of the forest dynamics map between 1984 and 2019, shows that bare land covers 32.7% of the study area, so this class was developed on the areas that have been degraded of the forest with 25% (thus a progression of 14.7%). On the other hand, despite the presence of new areas of growth and expansion in the forest with 16.6%, there has been a 14.7% decline in forest area (between 1984, 2001 and 2019). This evolution is justified by a combination of several factors: topographical (slopes, altitudes and exposure of slopes), climatic, geological and even anthropogenic. The treatment results and the accuracy of the classification have been verified and validated by field checks Description: Algerian journal of arid environment

2022-06-30T00:00:00Z RAHMANI Youcef KHAMA Réda https://dspace.univ-ouargla.dz/jspui/handle/123456789/31604 2023-06-05T08:35:26Z 2022-06-30T00:00:00Z

Titre: STUDY THE EFFECT OF SUN AND MICROWAVE DRYING ON QUALITY OF CAMEL MEAT (Camelus dromedarius) SLICES Auteur(s): RAHMANI Youcef; KHAMA Réda Résumé: Drying is still considered to be an efficient and important process used for food preservation. Several drying methods are commonly used, so it would be interesting to compare them. The comparison could focus on the quality of the dried products, which is mainly dependent on changes occurring during processing. In the current contribution, an experimental study of drying camel meat (Camelus dromedarius) by two methods, namely direct sun drying and microwave drying, is performed. The investigation is carried out to determine the adequate better drying technique for camel meat from the region of Ouargla, southeast Algeria. Under pre-treatment in a saline solution during 30 minutes of soaking, the samples used are slices 8 mm thick, 100 mm long and 20 mm wide. They are characterized by the initial water content of 73.38 ± 0.13%, the protein content of 19.77 ± 0.05%, an ash content of 1.123 ± 0.009 and a lipid content of 3.72 ± 0.05%. The sun drying experiments are carried out at an average temperature of 21.55°C and average relative humidity of 28.57%. The microwave drying is carried out at a power of 180 and 270 W. At the end of drying, kinetics, rate drying, duration drying, organoleptic properties (color and size) and nutritional values (protein and lipid) are determined in each case. Although drying in the microwave is faster and shorter, the results show that the samples sun dried are better. Indeed, sun drying shows a shrinkage rate of 43.63 ± 0.37% against 56.75 ± 0.36% at 180 W and 57.65 ± 0.32% at 270 W for microwave drying, with total color differences of 20.59 ± 0.48 against 24.63 ± 0.73 at 180 W and 23.10 ± 0.70 at 270 W for microwave drying. Protein content increases significantly after sun drying (49.44 ± 0.21) and microwave drying (45.30 ± 0.02% at 180 W and 40.64 ± 0.01 at 270 W). The results also show lipid preservation of 84.13% during sun drying and an increase in ash content in both drying processes from 1.123 ± 0.009 to: (i) 4.235 ± 0.015 at 180 W and 4.266 ± 0.037 at 280 W, in microwave drying; (ii) 3.903 ± 0.07 during sun drying Description: Algerian journal of arid environment

2022-06-30T00:00:00Z HAMID OUDJANA Aicha ZEGOUBA Bouchra LAHLAH Bachira KEMASSI Abdellah OULD EL HADJ Mohamed Didi https://dspace.univ-ouargla.dz/jspui/handle/123456789/31603 2022-12-15T10:22:55Z 2022-06-30T00:00:00Z

Titre: EFFET INSECTICIDE ET ANTICHOLINESTERASE DE L’EXTRAIT AQUEUX FOLIAIRE DE L’ORTIE Urtica dioica L. (Urticaceae) SUR LES LARVES L4 DU Culex pipiens L. (Diptera, Culicidae) Auteur(s): HAMID OUDJANA Aicha; ZEGOUBA Bouchra; LAHLAH Bachira; KEMASSI Abdellah; OULD EL HADJ Mohamed Didi Résumé: This study focuses on the toxicity of the aqueous leaves extract of Nettle Urtica dioica, collected from El-Golea in the septorienal Algerian Sahara, on Culex pipiens L. larvae L4. The study shows that the percentage of cumulative mortality is proportional to the applied dose; the extract at dilutions 100%, 80%, 60%, 40% and 20% caused 100% larval mortality after 9h, 11h, 12h, 48h and 72h, respectively. The estimated lethal times 50 (LT50) are 1min 8', 35min, 1h65 min, 9h79 min and 21h60 min recorded in larvae treated with 100%, 80%, 60%, 40% and 20% doses respectively. The estimated lethal dose 50 (LD50) was 0,0446 mg/ml. The treatment of Culex pipiens larvae L4 with increasing doses of Urtica dioica extract significantly decreased cholinesterase activity. The most noticeable inhibition is that of 100% dilution which decreased the activity to 2,89 ± 0,48 nano-mol/ml/min. The study of the biological effect of the aqueous leaf extract of Nettle provides interesting insecticidal and anticholinesterase properties to nettle against Culex pipiens larvae. Description: Algerian journal of arid environment

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