Browsing by Author "Laouini, S. E"

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COMPARATIVE STUDY OF PHYTOCHEMICAL COMPOSITION AND IN VITRO ANTIOXIDANT ACTIVITY FROM SWEET AND SOUR POMEGRANATE EXTRACT (PUNICA GRANATUM L)
(university of el oued/جامعة الوادي, 2018-09-01) Zidane, M; Ouahrani, M. R; Laouini, S. E
In this paper, to investigate the phenolic content and in vitro antioxidant of peel extracts from sour and sweet pomegranate (Punica Granatum L). The assessment of the antioxidant capacity using 2,2’-azinobis (3-ethylbenzothiazoline-6-sulfonic acid) diammonium salt (ABTS), DPPH, and metal chelating radical scavenging capacity assays. Furthermore, the total phenolic content measured by Folin-ciocalteu method as well conducted. The sour peel ethanolic extract was found to contain a high content of total phenolic content, for the flavonoids sweet ethanolic extract flavonoids contained the high amount. All extracts exhibited a higher antioxidant activity and the inhibitory effect of radicals scavenging activity against ABTS, DPPH, and metal chelating. The results suggest that the sour peel ethanolic extract and sweet peel ethanolic extract can be considered as a good source of natural antioxidant.
PHYTOREMEDIATION PERFORMANCE OF URBAN WASTEWATER BY THE PAPYRUS ALTERNIOFOLIUS IN EL-OUED REGION (SOUTHEAST OF ALGERIA
(university of el oued/جامعة الوادي, 2018-09-01) Zaghdi, S; Laouini, S. E; Bebba, A. A
The aim of this study is to highlight the ability of plants to purify wastewater with a horizontal flow system under a dry and hot climate. The process consists of circular beds with a capacity of 30 L filled with superimposed layers of gravel (25/15) mm, sand, 45 cm and 10 cm deep respectively. The first bed was planted with freshly collected stems of the plant Papyrus alterniofolius (40 stems/m2) and an unplanted bed was taken as a witness. The results revealed important removal fractions of the main pollutants namely: chemical oxygen demand COD (70,59%), biochemical oxygen demand BOD5( 97,25%) total suspended solids TSS (97.16%), nitrite NO2– ( 65.55%), nitrate NO3-(86.16 %), E. coli (99.41%), total coliforms (99.97 %) and total streptococcus (99.90 %). The considerable decrease of pollutants content and harmful organisms enables the reuse of the treated water in agriculture and industry.
SOLVENT AND TECHNIQUES EXTRACTION INFLUENCE ON PHYTOCHEMICAL PROFILE AND FREE RADICALS INHIBITION OF PHEONIX DACTYLIFERA L
(university of el oued/جامعة الوادي, 2018-09-01) Dia, O; Ouahrani, M. R; Laouini, S. E
The main of this investigation was to compare the extraction efficiency of different methods with various solvents from Phoenix dactylifera L extracts. The antioxidant activity and total phenolic compounds of extracts were evaluated using the various method. The highest extraction yield was founded in 70% methanol. Acetone extract exhibited a higher total antioxidant activity, ferric reducing antioxidant power and DPPH radical scavenging activity. The same extract also exhibited the highest phenolic, flavonoid, flavanol and condensed tannins contents. The results revealed that the ultrasonic is most suitable for the extraction of phenolic compounds and thus showing high levels of phenolic content and very high antioxidant capacities relative to the soxhlet and maceration technique. The results propose that Phoenix dactylifera L leaves extract can be considered as a rich source of natural bioactive compounds.