Zehour Rahmani

• Professor
• Professor at University Kasdi Merbah Ouargla

The term of medicinal plants includes various types of plants used in herbalism and some of these plants have medicinal activity. Knowing that the Sahara represents the three quarters of the grounds of our country, and that it contains a vast practically unexplored flora. This fact tried us to study a plant which is in the Sahara pertaining to the...

Introduction: The term of medicinal plants includes the plants that possess therapeutic properties or exert beneficial pharmacological effect on the human or animal. Knowing that the Sahara represents the three quarters of the grounds of our country, and that it contains a vast practically unexplored flora. This fact tempted us to study a plant whi...

The present investigation is aimed at screening the bioactive compounds present in the leaves of Pergularia tomentosa L. an important ethnomedicinal plant. The qualitative analysis for the present phytochemicals was performed using MeOH/H2O extracts. Phytochemical analysis showed the existence of some primary and secondary metabolites, phenolic, fl...

This study was aimed to assess in vitro antioxidant activity and to isolate some bioactive compounds present in the leaves and stems of Pergularia tomentosa L. The Phytochemical analysis of the leaves and stems extracts showed that this plant is rich of various secondary metabolites such as cardenolides, flavonoids, saponins, steroids, tannins, alk...

This study was aimed to extract and to isolate some bioactive compounds present in the stems of Pergularia tomentosa L. The Phytochemical analysis of the stems extracts showed that this plant is rich of various secondary metabolites such as alkaloids, flavonoids, saponins, steroids, tannins etc. Five extracts were obtained using different solvents...

For the first time in this report, we determined the antioxidative capacity of Cupressus sempervirens extracts by using two methods such as inhibition of superoxide anion (0∙−2) made by alkaline pyrogallol, and electrochemical generation of this radical. We have studied the O2/0∙−2 redox couple on the GC in DMF. We obtained well-resolved quasirever...

The present work aimed to investigate and to determine some bioactive compounds present in the leaves of Algerian plant, Pergularia tomentosa L. The Phytochemical analysis of the leaves extracts showed that this plant is rich of various secondary metabolites such as alkaloids, flavonoids, saponins, steroids, tannins etc. Five extracts were obtained...

The aim of this work is to determine the partition coefficients log Pwo of eleven compounds including dithiolethiones, dithiolone, nitrone, 1,2-dithiole-3-imine and compounds which is carried out by two experimental methods i.e., UV-visible and HPLC. According to the procedure of the traditional method shake-flask and we confirm the results by usin...

In the present study, the total potential antioxidant activities and total phenolic, tannins and flavonoids contents of different extracts of the leaves of Moringa oleifera grown in Tamanrasset, Algeria were determined. Standard antioxidant methods including the DPPH scavenging, reduction of Mo(VI) to Mo(V) and a free radical scavenging activity as...

This paper tuckels the phytochemical analysis of the Aerva javanica which has revealed that the plant contains various chemicals as flavonoids, tannins, alkaloids, saponins and phenols. This study was carried out to evaluate the amount of flavonoids and phenols stored inside of the pedicel and petals using the following solvents chloroform, ethyl a...

The main objectif of this study is assess in vitro antioxidant capacity of the stems of Pergularia tomentosa L. and isolate some bioactive compounds present in the leaves of this plante. The Phytochemical analysis of the leaves extracts showed that this plant is rich of various secondary metabolites such as alkaloids, flavonoids, saponins, steroids...

This study was aimed to extract and to isolate some bioactive compounds present in the leaves of Pergularia tomentosa L. The Phytochemical analysis of the leaves extracts showed that this plant is rich of various secondary metabolites such as alkaloids, flavonoids, saponins, steroids, tannins etc. Five extracts were obtained using different solvent...

Subject description: Safe and effective antioxidants are regarded as a cornerstone for the prevention and treatment of several types of disorders. Objectifs : The main objectif of this study is assess in vitro antioxidant capacity of Pergularia tomentosa L. and isolate some bioactive compounds present in the leaves of this plante. Methods: Phenolic...

This work focuses on the study of leaf and fruit extracts from a medicinal plant Cupressus sempervirens L. (Cupressaceae) cultivated from the Ouargla region. The target of this work is the determination of the structures of isolated compounds from the ethyl acetate fraction, and the evaluation of the biological activity of this plant's extracts. An...

In the present research the crude extract and all fractions of Moringa oleifra leaves grown in Tamanrasset, were examined for its antioxidant activities by using three different assays such as DPPH scavenging activity, superoxide anion scavenging activity and phosphomolybdenum capacity.The quantitative estimation of total phenolics, flavonoids and...

The aim of this study is to investigate the antioxidant ability of the date fruits palm (Phoenix dactylifera L) of variety (Ali Ourached) which had been watered with different sources of water (Ground water and Tap water) from Oued Souf, Algeria. The methanolic extracts of Ali Ourached date fruit watering with Ground water (AG) and Tap water (AT) w...

Pergularia tomentosa L is an important ethnomedicinal plant. The main objective of this study is the extraction, isolation and characterization of some bioactive compounds present in the leaves and stems of this plant. Phytochemical analysis revealed the presence of some primary and secondary metabolites in the stems like: phenolic, flavonoids, tan...

The effect of iodide ions on the corrosion inhibition of mild steel in 20% sulfuric acid in the presence of 3-méthylthio-5-p-méthoxyphényl-1,2-dithiolylium against anion (I-) (A1) was studied by different electrochemical techniques such as electrochemical impedance spectroscopy, potentiodynamic polarization. The obtained results showed that (A1) ef...

The present work aimed to investigate and to isolate some bioactive compounds present in the leaves of Algerian plant, Pergularia tomentosa L. The Phytochemical analysis of the leaves extracts showed that this plant is rich of various secondary metabolites such as alkaloids, flavonoids, saponins, steroids, tannins etc. Five extracts were obtained u...

Cupressus sempervirens (Cupressaceae) “cypress” is growing in the Mediterranean basin; it is a medicinal and an aromatic plant it used in treatment of many diseases in traditional medicine. This paper aims to determining antioxidant potential of C. sempervirens extracts and evaluating their inhibitory effects on α-amylase enzyme. The antioxidant pr...

This study was aimed to assess in vitro antioxidant activity and to isolate some bioactive compounds present in the leaves and stems of an Algerian plant, Pergularia tomentosa L., an important ethnomedicinal plant1. Nine extracts were obtained using different solvents like chloroform, ethyl acetate and n-butanol. In order to determine in vitro an...

The present inquiry attempts to determine the antioxidant capacity of Launaea resedifolia's hydroalcoholic extract which is obtained from Algerian Sahara. The antioxidant capacities of various extracts of aerial parts of L. resedifolia were estimated by using 1,1-diphenyl-2-picrylhydrazyl (DPPH) radical-scavenging capacity, ferric reducing power (F...

In this research, we examined the effect of nickel ions on the electrochemical behaviour of a compound dithiolic. We have noticed that the addition of an increasing quantity of Nickel ions involves the modification of the intensity of the cathodic current of this compound without modifying its potential of reduction. In addition, there is a displac...

In this work, we studied the Nickel electrodeposition to determine its potential of reduction. Then. We studied the complexation of this compound dithiolic selected with Nickel in a mixed medium (DMF/H2O) by an electrochemical method. We have noticed that the addition of an increasing quantity of Nickel ions involves the modification of the intensi...

Essential oils from six varieties of Ocimum basilicum L. grown in the west of Algeria (Mediterranean region) were identified by GC-MS chromatography using two different types of capillary columns: non-polar and polar. Chemotypes identified by the non-polar column are Ocimum basilicum, Ocimum basilicum purparescens opal, Ocimum basilicum minimum, Oc...

Etude de la relation structure-activité antioxydante et antihémolyse des érythrocytes humaines par quelques dithiolethiones et composés phénoliques Remerciements i Remerciements Je remercie tout d'abord ALLAH le tout puissant de m'avoir donné la santé la patience, la puissance et la volonté pour réaliser ce travail. Ce travail a été réalisé au labo...

La synthèse de dithioliques (nitrones) 1 et (imines) 2, conduit par la condensation de p-nitroso N,N-diméthylaniline sur les 5-méthyl-1,2-dithiole-3-thiones diversement substituées en position 4. Cette réaction conduite, de manière surprenante, à un mélange de nitrones et d'imines. D'une manière générale, les dithiolethiones et les dithiolones étud...