Our problem is to evaluate the behavioral effects of formaldehyde on the anxiety and cognitive abilities of Wistar rats on the one hand, on the other hand, we have proven the protective effect of an antioxidant, “curcumin”. The positive antidepressant and anti-anxiety effects of curcumin are most likely due to its ability to normalize specific physiological mechanisms, in addition to being a potent antioxidant and anti-inflammatory agent. Curcumin also protects the brain and simultaneously acts on several mechanisms related to depression. It is considered to be the most promising therapeutic target for treating depressive behavior. 25 male rats weighing approximately 240 g were divided into equal five groups, toxicity was induced by a single intraperitoneal injection of formaldehyde at a dose of 10 mg/kg. Behavioral test in “light/dark box test” revealed that animals exhibited an anxious behavior when compared to control. The curcumin, was administered orally (gastric gavages) at a dose of 60 mg / kg. The effects of formaldehyde gas on the variation in body weight and an alteration in locomotive and exploratory activities when compared to control. Our results show the therapeutic benefits of curcumin against the deficits caused by formaldehyde reflected in a disturbance in rat behavior.

No abstract

This study aims to determine the relationships likely to exist between the edaphic variables and the abundance of oak species in the Edough forest of the commune of Seraidi (North East of Algeria), a humid bioclimatic stage where rainfall is abundant. In order to characterize the properties of the soils of the Edough forest (Seraidi) and to verify the usefulness of the fractionation of organic matter in a forest ecosystem, we have established a prospecting sampling plan based on a topographic background of the superposition of the different plant groups. In this context, the approach we adopted consisted on three main steps (i) a stratified sampling of the soil, (ii) the determination of the different strata of vegetation, (iii) describing the soil on which these plant formations settle and develop. Our results revealed that the soils of the Edough forest are acidic to very acidic and non-saline. It is also characterized by clayey texture that is not very permeable, with a high rate of organic matter, which controls the buffering capacity of the soil. The characterization of the soils allowed determining three types of plant formations and thus three types of soils where pedogenesis is under direct control of the supply of organic matter. The relationship between the soil and the vegetation in this forest is clearly close. It is mainly controlled by the supply of organic matter, which shows a significant dynamic and evolution. On the other hand, the climatic conditions and the type of plant formations have a capital role in the mineralization of the existing organic matter.

Water plays a crucial role in all aspects of our lives, including the economy, food security, production, and politics, making it essential for sustainable development. Surface water pollution, which includes rivers, lakes, and oceans, is a significant environmental concern. Oued D'Hous, located in the Wilaya of Bouira in Algeria, is the subject of our research, which examines its hydrochemical pollution resulting from the discharge of domestic, industrial, and agricultural wastewater from the city. The evaluation of the physicochemical parameters reveals that the existing pollutant levels in Oued D'Hous have significantly increased, leading to a high degree of toxicity that threatens the area's flora and fauna. This pollution also limits the use of this resource by humans. We call upon the competent authorities to promptly limit the discharge of these hazardous effluents into Oued D'Hous to prevent further water contamination and reduce the risk of adverse health effects on the public, including those who use the wells located in the vicinity. In conclusion, immediate measures are necessary to mitigate the severe pollution of Oued D'Hous, and we urge the authorities to take action to address this pressing environmental concern.

Our study area is a transect that connects the wilaya of Souk-Ahras and the wilaya of Tebessa where it is formed by a mountainous massif site that includes a very important vegetal diversity. This area is located in the North East of Algeria where it prevails a Mediterranean climate, characterized by a temperature gradient that increases from North to South, whose average annual rainfall evolves in the opposite direction of the temperature. To identify the diversity of soils in this region we made a qualitative characterization of soils that integrate the axis between the north and south of the wilaya of Souk-Ahras and Tebessa, we chose six stations representative of the area in question, several physico-chemical parameters were studied such as, the granulometry, hydrogen potential, electrical conductivity, hygroscopic moisture, organic matter and total limestone to define and enhance the quality and richness of the soil of this region. The physicochemical characterization reveals a diversity of the nature and quality of soils in this mountainous region, and an adequacy between the soil, the climatic environment and the type of plant cover whatever the region.