In this study, pomace olives coming from different mills (Press process, continuous process two-phases and threephases) were used for extraction of oils. The highest oil yield (12.92%) was obtained with pomace olives coming from press process. Total contents of phenolics (13.47 - 21.25 mg GAE/100 g oil) and flavonoids (5.90 - 12.52mg QE/100 g oil)were determined spectrophotometrically. The pomace olive oil “POO3” (Pomace olive coming from 3-phases system) presented the highest phenolic, flavonoid contents and showed the highest DPPH, ABTS scavenging, metal chelating activity. In vitro anticholinesterase activity, the olive pomace oils showed moderate inhibition against AChE and BChE which are the key enzymes taking place in pathogenesis of Alzheimer’s disease. These results showed that the tested oils can be considered as sources of natural antioxidant, as well as moderate anticholinesterase agents.

This paper is about groundwater’s quality in Ghassira which is located in El-Abiod valley in eastern Algeria. The water is used for human consumption and irrigation. The different layers belong to several types of rocks (limestone and evaporate ...). To study the behaviour   of dissolved salts in this water, we have used geology of the aquifers and statistics. This combination gives us information about minerals those are responsible of water’s quality.  80% of analyzed samples are influenced by evaporate rocks (gypsum, halite…) and 20% by limestone. Many processes have generated these two classes and are relating, especially, with the rocks of aquifers.

Ain Djacer Area is the seat of an aquifer which is located in the alluvial deposits of Mio-Plio-Quaternary. This groundwater has to bedrock clays and gypsum marl Miocene, is surrounded by Cretaceous limestones which are limited to a fixed potential. It is a synclinal filled by sediments Mio-Plio-Quaternary where all flows converge toward the center of the plain. The intensive exploitation of groundwater resources in the region has greatly influenced the hydrodynamic and hydrochemical functioning of the shallow aquifer. This caused a decrease in the static level and mineralization of groundwater. To demonstrate the effect of this situation on the quality of groundwater, a hydrogeochemical study was conducted. This study showed that the calcium bicarbonate facies is near limestone and sodium chloride concentration in the center of the plain in liaison with the lithology. The thermodynamic analysis showed that the main geochemical processes involved in the acquisition of saline load are related to water-rock interaction (dissolution of carbonate and evaporate minerals), the cation exchange and concentrating along flow. 

La région de Ain Djacer est le siège d’un aquifère superficiel qui se trouve dans les alluvions du Mio-Plio-Quaternaire. Cette nappe qui a pour substratum les argiles et les marnes gypseuses du Miocène, est entourée par les calcaires du Crétacé qui constituent une limite à potentiel imposé. Il s’agit d’un synclinal comblé par les sédiments du Mio-Plio-Quaternaire où tous les écoulements convergent vers le centre de la plaine. L’exploitation intensive des ressources en eaux souterraines de la région a largement influencé le fonctionnement hydrodynamique et hydrochimique de cette nappe. Ceci a induit une baisse du niveau statique et une minéralisation des eaux souterraines. Afin de mettre en évidence l’effet de cette situation sur la qualité des eaux souterraines, une étude hydrogéochimique a été menée. Cette étude a montré que le faciès est bicarbonaté calcique près des calcaires et chloruré sodique au centre de la plaine en liaison avec la lithologie. L’analyse thermodynamiques a montré que les principaux phénomènes géochimiques intervenant dans l’acquisition de la charge saline sont liés à l’interaction eau-roche (dissolution des minéraux carbonatés et évaporitiques), à l’échange cationique et à la concentration le long de l’écoulement