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CAMEL GELATIN PRODUCTION IN ALGERIA: FROM BIOLOGICAL POTENTIAL TO INSTITUTIONAL AND ECONOMIC CONSTRAINTS

Wed, 31 Dec 2025 00:00:00 GMT

Titre: CAMEL GELATIN PRODUCTION IN ALGERIA: FROM BIOLOGICAL POTENTIAL TO INSTITUTIONAL AND ECONOMIC CONSTRAINTS Auteur(s): IMELHAYENE Meriem; SAIDJ Dahia Résumé: Gelatin is a strategic material for food, pharmaceutical, cosmetics, and biotechnology industries. Despite substantial camel resources, Algeria remains dependent on gelatin imports, causing significant hard currency drainage. This study analyzes the potential for valorizing camel slaughter by-products for gelatin extraction and identifies constraints hindering establishment of a sustainable national production project. Official data from the Ministry of Trade and Export Promotion revealed that Algeria's gelatin imports in 2021 reached 1.26 million $ (6,057 tons), while exports represented only 1% of trade. Primary demand concentrated in food industries (>1,000 tons annually), pharmaceutical sectors (60 tons), and electronics. Camel meat production in 2021 generated approximately 22,500 tons of bones annually, theoretically enabling production of 5,175 tons of gelatin at 22% extraction rate, alongside 794 tons of hides nationally. Critical constraints preventing project implementation include absence of proper collection and preservation protocols, lack of cold chain infrastructure, inadequate sanitary quality controls, and minimal coordination among value chain stakeholders. A comprehensive national strategy integrating industrial security and bioeconomy principles is required, with coordinated involvement of Agriculture, Industry, and Higher Education ministries, supported by pilot projects to transform biological potential into sustainable economic development in arid regions. Description: Revue des BioRessources

SARCOME D'EWING EPIDURAL : DIAGNOSTIC, PRISE EN CHARGE ET RESULTATS CHIRURGICAUX AU SERVICE DE NEUROCHIRURGIE DU CHU D'ANNABA

Wed, 31 Dec 2025 00:00:00 GMT

Titre: SARCOME D'EWING EPIDURAL : DIAGNOSTIC, PRISE EN CHARGE ET RESULTATS CHIRURGICAUX AU SERVICE DE NEUROCHIRURGIE DU CHU D'ANNABA Auteur(s): SAMAI Naouel; NACER Habiba; SAMAI Ibtissem; BOUAZIZ Mourad Résumé: Ewing's sarcoma is a rare malignant tumor in children and adolescents, most often osseous. Its spinal epidural location is scarce (<1%) and constitutes a neurological emergency. This study aims to describe the clinical, radiological, and evolutionary characteristics of this particular entity, and to discuss its management in light of international data. We conducted a retrospective study involving 5 patients aged 8 to 32, who were followed at Ibn Rochd University Hospital in Annaba between 2009 and 2023. Demographic, clinical, imaging, histological, and therapeutic data were analyzed. All patients underwent decompression surgery, followed by chemotherapy according to the VDC/IE protocol. Survival was assessed descriptively. Three patients were female (60%) and two were male (40%). All presented with spinal cord compression. RI allowed for rapid detection, and diagnostic confirmation was obtained through histology in 100% of cases patients presented with metastases at diagnosis. The progression Summary was marked by partial or complete neurological recovery in 4 patients. At a median follow-up of 18 months, the overall survival was 80%. A local recurrence was observed. The difference according to sex was not significant (p =0.67). Epidural Ewing's sarcoma remains a rare but formidable form requiring urgent multidisciplinary management. Our series, although limited, confirms the effectiveness of a combined surgery-chemotherapy treatment. Early diagnosis remains crucial for functional prognosis. The establishment of multicentric registries is necessary to better understand this entity and improve its management in resource-limited countries Description: Revue des BioRessources

VASCULARISATION ARTERIELLE DE LA MAIN : ETUDE ANGIOSCANNER, VARIATIONS ANATOMIQUES ET APPLICATIONS CHIRURGICALES

Wed, 31 Dec 2025 00:00:00 GMT

Titre: VASCULARISATION ARTERIELLE DE LA MAIN : ETUDE ANGIOSCANNER, VARIATIONS ANATOMIQUES ET APPLICATIONS CHIRURGICALES Auteur(s): NACER Habiba; SAMAI Naouel; SAMAI Ibtissem Résumé: La vascularisation de la main, assurée par les arcades palmaires superficielle et profonde, présente une grande variabilité anatomique, pouvant influencer la planification des lambeaux en chirurgie reconstructrice. L’angioscanner s’est imposé comme un outil fiable d’évaluation vasculaire préopératoire. Étude descriptive rétrospective menée de 2015 à 2024 portant sur 94 patients adultes traités pour reconstruction de la main au CHU d’Annaba. Chaque patient a bénéficié d’un angioscanner préopératoire. Les données anatomiques vasculaires, les types de dominance artérielle et les résultats chirurgicaux des lambeaux utilisés ont été analysés.L’arcade palmaire superficielle complète a été retrouvée dans 87 % des cas et l’arcade profonde complète dans 75 %. La dominance ulnaire (type U10.R0 ou U7.R3) représentait 91 % des profils vasculaires. L’angioscanner a permis une évaluation complète dans 97 % des cas, avec une concordance peropératoire dans 92 %. Les lambeaux utilisés (Cross-finger, Moeberg et O’Brien, Cerf-volant de Faucher) ont été choisis en fonction des résultats scanographiques, avec une couverture fonctionnelle satisfaisante dans l’ensemble des cas. L’angioscanner constitue un outil préopératoire de grande valeur pour la cartographie vasculaire de la main. Il permet une personnalisation des gestes chirurgicaux, améliore la sécurité des lambeaux et optimise les résultats en chirurgie reconstructrice post-traumatique. Description: Revue des BioRessources

DEMOGRAPHIC STRUCTURE AND STAND DYNAMICS OF THE EL HAMIMET FOREST MODELED BY THE WEIBULL DISTRIBUTION

Wed, 31 Dec 2025 00:00:00 GMT

Titre: DEMOGRAPHIC STRUCTURE AND STAND DYNAMICS OF THE EL HAMIMET FOREST MODELED BY THE WEIBULL DISTRIBUTION Auteur(s): Malika RACHED-KANOUNI; Ratiba BOUSBA; Sara ZOUAD; Alia ZERROUKI; Labed ABABSA Résumé: This study involved dendrometry analysis and modelling of the demographic structure of stands in the El Hamimet forest (Oum El Bouaghi, Algeria), dominated by Aleppo pine (Pinus halepensis Mill.) and green cypress (Cupressus sempervirens L.). Four representative plots were studied in order to assess the variability of dendrometry and structural parameters. The average diameters observed ranged from 13.4 to 22.8 cm, and the average heights ranged from 3.2 to 4.5 m, reflecting marked heterogeneity between young and mature stands. The average basal area ranged from 15.2 to 27.6 m²/ha, with a density of 820-1,150 stems/ha, reflecting varying conditions of competition and growth. By fitting the diameter and height distributions to a three-parameter Weibull distribution, we characterized the demographic structure in detail. The values of the shape parameter (k) ranged from 1.46 (P2) to 2.70 (P4), indicating structures ranging from young, regenerating stands to mature, homogeneous stands. The scale parameter (λ), ranging from 3.22 to 4.53, reflects the dispersion of heights and diameters across development stages. These results show that plots P1 and P4 have stable structures with a predominance of mature trees, whereas P2 and P3 exhibit active regeneration dynamics. All of these observations highlight the structural complexity and functional diversity of the El Hamimet forest. The use of Weibull’s law proved particularly effective for interpreting the distributions of heights and diameters, enabling assessment of the dynamics of stand growth and succession. These results provide an essential basis for guiding silvicultural practices toward sustainable, resilient management of Mediterranean forest ecosystems Description: Revue des BioRessources