Terras Mohamed ---

• Professor
• University of Saida Dr.Moulay Tahar

Ziziphora hispanica L. (Lamiaceae) is a medicinal aromatic plant which is native to Algeria in semi-arid regions, Morocco and southern Spain. Despite the medicinal and economic interests as well as the uncertain future that this species may encounter in its natural habitats, various aspects of the biology of its seeds have not been recognized up to...

Agriculture plays a fundamental role for the economies of North African countries, in the development of territories and the fight against poverty. The region faces a cereal deficit and their supply of this material is highly dependent on international markets. During 1990-2010, the volume of agricultural imports tripled for North African countries...

Modeling potential habitat for plant species is an appropriate approach to maintain biodiversity, developing proper reforestation campaigns, and rehabilitating ecosystems. In this study, we investigated the potential distributions of four forest species, namely, Quercus faginea Lam.; Q. ilex L.; Tetraclinis articulata (Vahl) Mast.; and Pistacia atl...

To better understand and manage the forest vegetation of the Saïda district (types of vegetation present, floristic compositions, possible types of degradation), a total of 215 phytoecological surveys were carried out in the study area. In each survey it was noted the intensity of the grazing and the presence or absence of regeneration of the tree...

Pistacia atlantica is a tree species, in Algeria that are included in the list of protected species and considered endangered. Prediction of the potential geographic distribution of this species and mapping of the most habitat suitability to promote their introduction are important from the point of view of their conservation and restoration. 23 en...

Otocarpus virgatus Durieu is an endemic plant, very rare to a very narrow distribution around the region of Saïda (Algeria) critically endangered, it has indehiscent fruits. The objective of this work is to study the influence of its fruit pericarp on the germination of seeds and effects of different concentrations of gibberellic acid (GA3) on the...

Mountain forest ecosystems and other biodiversity reserves represent “safety nets” for many communities for their livelihoods. They are economi-cally important sources of wood, fodder, food and non-wood forest prod-ucts. Controlling. the sustainable management of forest ecosystems neces-sarily involves identifying and assessing their condition and...

Importance des métabolites secondaires en écologie et en phytothérapie Principaux groupes de Métabolites secondaires et structures chimiques Voies de biosynthèse de métabolites II (Voie de shikimate) Principales fonctions biologiques des métabolites II (Effets bénéfiques) voies de signalisation importantes dans la vie cellulaire

Fatty acid and phytosterol vegetable oils were extracted from seeds of Cucurbita pepo (or pumpkin) into (v/v) hexane. The extract obtained was characterized by the contents of sterols, unsaturated and saturated fatty acids. The content of the bioactive compounds was determined by gas-chromatography FID method. Pumpkin seed oil extracts showed highe...

Biological control against runoff with the use of Tamarix gallica Wahl. Seems to give interesting results, both economically and ecologically. stabilization of soil threatened and subjected to erosion and the installation of a herbaceous layer is clearly visible after exclosure. Dendrometric results are also presented in the dynamic component and c...

Tetraclinis articulata (Vahl) Masters is a coniferous tree, endemic to North Africa and considered as an endangered species in Algeria despite having ecological, socio-economic and environmental interests. Ecologists and foresters today insist on the eminent place that this forest essence plays in the structuring of the vegetal landscapes of the Ma...

Prostatic adenoma, or benign prostate hypertrophy (BPH), is a natural and common disease in elderly men. Its etiology is multifactorial. BPH is associated with annoying symptoms and morbid complications. The treatment of BPH with drugs, or synthetic chemicals, damages hepatic and renal tissues developing cirrhosis and kidney failure. As an alternat...

The present study focuses on an analysis of the evolution of plant biodiversity dynamics in a steppic zone from a phytoecological standpoint, concentrating on a set of reforested species in the Sidi Bel Abbes region (Cas de Ras El Ma). The research work is based on geographical, physiological, biometric and clima c aspects. The results obtained fro...

Anacyclus pyrethrum (L.) Link is a vulnerable medicinal plant, in order to provide basic information for its conservation and reintroduction, the impact of saline stress and water stress on seed germination was studied and mapping of the habitat suitability of this species in the Saida region was predicted using the Maxent method. The salinity trea...

This work was done to evaluate allelopathic effects on seed germination of Artemisia herba-alba. Two aqueous extracts at different concentrations of leaves (LAC) and roots (RAC) of Atriplex canescens were prepared from: 2,5%; 5%; 10%;20% and 40%. They were used methodically on the seeds of Artemisia herba-alba. The results obtained showed that the...

In the present study, four fractions were prepared from leaves extract of Atriplex nummularia. This study aimed to determine TPP (total polyphenols), FLV (flavonoids) and CT (condensed tannins) on one hand and on the other hand, to evaluate the antiradical activity of the hydroalcoholic and aqueous fractions by four different methods including: DPP...

An evaluation and inventory study on the natural vegetation cover and its diversity was carried out on the forest vegetation of the district of Saïda. The floristic diversity of our study area revealed the existence of 397 taxa belonging to 64 families and 271 genera. The most important families are Asteraceae (42 genera), Fabaceae (25 genera), Bra...

The knowledge of traditional healers o en represents a basis for the pharmacological and phytochemical inves ga on of naturals medicaments. This work aims for the phytochemical study and evaluation of the antioxidant activity of essential oils of medicinal plant Pistacia atlantica.Through the results obtained, it appears that the leaves are rich in...

Keywords: Insecticides; Cypermethrin; Metabolic Disorders; Medicinal Plants; Blood Glucose Uncontrolled and excessive uses of insecticides, in agriculture, will expose the human and animal health to a high risk of chemical toxicity. Cypermethrin (CYP) is widely handled in tomato growing fields in Algeria. In addition to brain and lung tissue damage...

Prunus cerasus leaves (PCL) and Chamaemelum nobile stalks (CNS) aqueous extracts have antimicrobial, antioxidant and pharmacological properties. This study aimed to assess PCL and CNS antibacterial effects on both pathogenic strains (Escherichia coli and Staphylococcus aureus). Extraction methods were used for this experiments including maceration,...

Prostate cancer (Pca) is a common neoplasia in elderly men. Its incidence increased over the last two decades in the Northern Africa. This study aimed to perform a comparison between epidemiological profiles of Pca in patients from two Maghreb countries (Algeria and Mauritania). This is a retrospective study carried out during 2014-2016, on populat...

Background: Uncontrolled and excessive uses of insecticides, in agriculture, will expose the human and animal health to a high risk of chemical toxicity. Objective: This study aimed to assess Myrtus communis (MC) effects against the toxicity induced by the Cypermethrin (CYP)in Wistar rat. Methods: The experimental period was 30 days, carried out on...

Objective: To assess cadmium sulfate (CdSO4) and zinc chloride (ZnCl2) antagonist effects on the prostate specific antigen and prostatic cell organization in rats. Methods: The study included 40 adult male rats, divided into four groups: Group 1 (CdSO4), Group 2 (ZnCl2), Group 3 (CdSO4ZnCl2) and Group 4 (control). Animals were treated with CdSO4 a...

Cadmium sulfate (CdSO4) and zinc chloride (ZnCl2) have antagonistic effects. Cadmium (Cd) is known for its necrotic effect and zinc (Zn) for its protective role. The objective of this study was to assess the effects of exposure to Cd on the histology of the lungs, liver, and kidneys of Wistar rats in the presence and absence of Zn. Methods: The stu...

Le problème majeur du moteur Diesel est la pollution due aux émissions de gaz polluants tels que le monoxyde de carbone (CO), les hydrocarbures imbrûlés (HC), les particules (suies) et les oxydes d'azote (NOx). Ces polluants ont une influence néfaste sur la santé de l'homme et l’environnement. L’objectif de cette étude est d’évaluer l’influence de...

The alteration of the Saïda's mineral waters quality is due to several factors mainly anthropogenic as water treatment plant dysfunction located in upstream watershed of the river, the practice of intensive agriculture using fertilizers and pesticides and the releases of the industrial zone. This situation, source of serious public health requires...

The incidence of benign prostatic hyperplasia (BPH) is known through the American and European continents whereas it remains much to make to know the epidemiologic profile of this pathology in Algeria. This study aims to show a contribution of diagnostic tests and drug therapy in screening of BPH in Western Algerian hospital. Our study was carried...

La estepa experimenta, bajo el efecto combinado del pastoreo y de la utilización anárquica, un proceso de degradación rápido y alarmante. Esta situación es inquietante para el futuro ecológico y socio-económico de esta entidad geográfica particular que acoge a más de 12 millones de cabezas de ovinos y más de una decena de millones de habitantes. A...

La steppe connaît sous l'effet conjugué du parcours et d'une utilisation anarchique, un processus de dégradation rapide et alarmant. Cette situation est inquiétante pour l'avenir écologique et socio-économique de entité géographique particulière qui abrite plus de 12 millions de têtes d'ovins et plus d'une dizaine de millions d'habitants. Le long d...