Amel Saad

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Dr.Yousery Sherif

Mansoura University

Angel Berenguer

University of Alicante / Universidad de Alicante

Irina Kolesnik

Moscow State University

Roberto Cortes

University of the Basque Country, Euskal Herriko Unibertsitatea

Isidro Martínez Mira

University of Alicante / Universidad de Alicante

Professor Dr. Loutfy H . Madkour

Al-Baha University, Kingdom of Saudi Arabia

Senka Djaković

University of Zagreb

Antonio G B da Cruz

Universidade Federal Rural do Rio de Janeiro

Jana Javornik

University of East London

Gwen Robbins Schug

University of North Carolina at Greensboro

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Papers by Amel Saad

Antiradical Properties of Moringa oleifera (Saharan Plant from Southwestern Algeria)

Phytothérapie, 2019

Antioxidant and Antimicrobial Activity of <i>Moringa oleifera</i> Extracts from South West of Algeria

Phytothérapie, 2023

The current study focuses on the phytochemical characterization and biological activity of phenol... more The current study focuses on the phytochemical characterization and biological activity of phenolic compounds derived from leaves of Moringa oleifera Lam. (Moringaceae) in the Tabelbala area (Bechar, Algeria). For a concentration of 1 mg/ml, the antioxidant tests revealed that the different extracts have a good reducing activity, with the tannin extract having the highest percentage of free radical inhibition (DPPH: 94%) compared to the n-butanolic extract (92%) and the ethyl acetate extract (88%). Furthermore, the tannin extract and the n-butanolic fraction of the flavonoids of the examined leaves showed significant antioxidant activity compared to ascorbic acid used as a reference (IC50 = 0.05 ± 0.14 mg/ml), with IC50 values of 0.07 ± 0.79 mg/ml for tannins and 0.0823 ± 0.25 mg/ml for the n-butanolic extract. In addition, the ferric reduction antioxidant power (FRAP) test reveals that all the tested extracts have a significant reduction power. The different selective extracts showed strong antimicrobial activity against nine pathogenic microbial strains: Escherichia coli (ATCC 25922), Pseudomonas aeruginosa (ATCC 27853), Klebsiella pneumoniae (ATCC 13883), Citrobacter freundii (ATCC 29212), Acinetobacter baumannii (ATCC 19606), Bacillus cereus (ATCC 11778), Staphylococcus aureus (ATCC 25923), Enterococus faecalis (ATCC 13045), and Candida albicans, where the ethyl acetate fraction has a higher antibacterial activity than n-butanolic and tannin extract, with the zone of inhibition diameters ranging from 11 to 23 mm and have minimum inhibitory concentrations (MIC) between 0.39 and 3.125 mg/ml. These findings give scientific support for the plant’s traditional use, highlighting the value of traditional medicines in the treatment of many diseases.

Chemical composition of the essential oil of Launaea arboresens from Algerian Sahara

Chemistry of Natural Compounds, May 1, 2006

Ethnobotancal studies and anticandidal activity of medicinal plants used for treatment of dermal mycoses in south west Algeria

Conservation of Leaves of a Medicinal Plant of Western Algeria (Pistacia atlantica)

L'apport des NTIC à l'Ethnopharmacologie du Sud Algérien

La splendeur de la flore Algérienne et plus particulièrement celle du Sud a toujours émerveillé l... more La splendeur de la flore Algérienne et plus particulièrement celle du Sud a toujours émerveillé les chercheurs par sa richesse et biorésistance. Et pour ne pas ignorer ces milliers d'espèces d'herbes sauvages dont les vertus médicinales ont été appréciées depuis des millénaires par les peuples du désert saharien, notre laboratoire (LPSO) a entrepris la réalisation d'un herbier numérique de référence d'environ 140 espèces en ayant recours aux nouvelles Technologies d'Information et de Communication(TIC).Ce dernier permettra une meilleur identification d'espèces et fourni un support pour l'enseignant en botanique et pharmacognosie ainsi qu'un média sur les plantes médicinales du Sud Ouest Algérien.

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Etude des isothermes de sorption des feuilles de (CAPPARIS SPINOSA L.)

Determination of Moisture Sorption Isotherms of Jasmine Rice Crackers Using BET and GAB Models

Food Science and Technology International, 2006

... qst value of rice crackers (24.86kJ/mol) was close to that of cookies (28kJ/mol) as reported ... more

Reactions « in Situ » Dans Le Procedes D’Extraction Des Huiles Essentielles

Au cours de l'hydro distillation, la vitesse de vaporisation des huiles essentielles du matér... more Au cours de l'hydro distillation, la vitesse de vaporisation des huiles essentielles du matériel végétal est influencée non seulement par la résistance à la diffusion de l'huile essentielle à travers les tissus cellulaires, mais aussi par le degré de solubilité de ces constituants volatils dans l'eau. De même, certaines réactions chimiques ( élimination, réarrangement,…) peuvent avoir lieu au cours du processus d’extraction en présence de l’eau.

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Antimicrobial activity of the essential oil of Bubonium graveolens

The antimicrobial activity of the essential oil from the endemic medicinal plant Bubonium graveol... more The antimicrobial activity of the essential oil from the endemic medicinal plant Bubonium graveolens was evaluated against Bacteria (E. Coli , S. Aureus , P. Aeruginosa , K. Pneumaniae , E. Faecalis) and fungi (C. Albican , S. Cereviceae). A broad spectrum of antimicrobial activity was exhibited. This is the first report on the antimicrobial activity of the oil of this specie.

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Chemical composition of the essential oil of Launaea arboresens from Algerian Sahara

Chemistry of Natural Compounds

The essential oil composition of Bubonium graveolens (Forssk.) Maire from the Algerian Sahara

Flavour and Fragrance Journal

FLAVOUR AND FRAGRANCE JOURNAL Flavour Fragr. J. 2007; 22: 286288 Published online 3 April 2007 i... more

Experimental Study and Modeling of Sorption Isotherms of Kabar Sid EL Cheikh Capparis Spinosa L. from Bechar (South West Algeria)

Energy Procedia

The moisture contents of balance of desorption and adsorption of Kabar Sid El Cheikh leaves (Capp... more The moisture contents of balance of desorption and adsorption of Kabar Sid El Cheikh leaves (Capparis spinosa .L) were determined at 30, 40, and 50 °C using the static gravimetric method. The balance was obtained after 12 days of desorption and 8 days of adsorption. The effect of thermal hysteresis is observed in the range of the tested temperatures. In one hand, for the modeling of sorption isotherms, on the other hand, for the prediction of the hygroscopic behavior, during storage or drying; two mathematical models were tested. The GAB model with three parameters has given best results according to the experimental points in a rather important domain of the activities of the water.

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Etude hygroscopique des feuilles de Kabar (Caparis Spinosa L.) en vue de leur séchage

Moisture sorption-isotherms and isosteric heat of henna leaves ( Lawsonia inermis.L) harvested in the Algerian Sahara

Journal of Engineering Physics and Thermophysics

The desorption isotherms and thermodynamic properties of coffee from different processing stages ... more The desorption isotherms and thermodynamic properties of coffee from different processing stages were obtained during the drying process of this product. The isotherms were determined by a static gravimetric method for various temperature and humidity conditions. Equilibrium moisture content (M e ) data were correlated by several mathematical models and an artificial neural network (ANN) model. The M e for coffee fruits, pulped coffee and green coffee increased with an increase in the water activity (a w ) at any particular temperature. At a constant a w , coffee fruits samples had higher M e than the remaining coffee samples. Based on statistical parameters, the ANN model, modified Henderson and GAB models were adequate to describe the sorption characteristics of the samples. Isosteric heat of sorption was evaluated by means of the Clausius-Clapeyron equation. It decreased with increasing moisture content. The coffee fruits had higher isosteric heat of sorption than that pulped coffee and green coffee.

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Mathematical Modeling of Moisture Sorption Isotherms and Determination of Isosteric Heats of Sorption of Ziziphus Leaves

Modelling and Simulation in Engineering, 2014

Desorption and adsorption equilibrium moisture isotherms of Ziziphus spina-christi leaves were de... more Desorption and adsorption equilibrium moisture isotherms of Ziziphus spina-christi leaves were determined using the gravimetricstatic method at 30, 40, and 50 ∘ C for water activity ( ) ranging from 0.057 to 0.898. At a given , the results show that the moisture content decreases with increasing temperature. A hysteresis effect was observed. The experimental data of sorption were fitted by eight models (GAB, BET, Henderson-Thompson, modified-Chung Pfost, Halsey, Oswin, Peleg, and Adam and Shove). After evaluating the models according to several criteria, the Peleg and Oswin models were found to be the most suitable for describing the sorption curves. The net isosteric heats of desorption and adsorption of Ziziphus spina-christi leaves were calculated by applying the Clausius-Clapeyron equation to the sorption isotherms and an expression for predicting these thermodynamic properties was given.

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Antiradical Properties of Moringa oleifera (Saharan Plant from Southwestern Algeria)

Phytothérapie, 2019

Antioxidant and Antimicrobial Activity of <i>Moringa oleifera</i> Extracts from South West of Algeria

Phytothérapie, 2023

Chemical composition of the essential oil of Launaea arboresens from Algerian Sahara

Chemistry of Natural Compounds, May 1, 2006

Ethnobotancal studies and anticandidal activity of medicinal plants used for treatment of dermal mycoses in south west Algeria

Conservation of Leaves of a Medicinal Plant of Western Algeria (Pistacia atlantica)

L'apport des NTIC à l'Ethnopharmacologie du Sud Algérien

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Etude des isothermes de sorption des feuilles de (CAPPARIS SPINOSA L.)

Determination of Moisture Sorption Isotherms of Jasmine Rice Crackers Using BET and GAB Models

Food Science and Technology International, 2006

... qst value of rice crackers (24.86kJ/mol) was close to that of cookies (28kJ/mol) as reported ... more

Reactions « in Situ » Dans Le Procedes D’Extraction Des Huiles Essentielles

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Antimicrobial activity of the essential oil of Bubonium graveolens

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Chemical composition of the essential oil of Launaea arboresens from Algerian Sahara

Chemistry of Natural Compounds

The essential oil composition of Bubonium graveolens (Forssk.) Maire from the Algerian Sahara

Flavour and Fragrance Journal

FLAVOUR AND FRAGRANCE JOURNAL Flavour Fragr. J. 2007; 22: 286288 Published online 3 April 2007 i... more

Experimental Study and Modeling of Sorption Isotherms of Kabar Sid EL Cheikh Capparis Spinosa L. from Bechar (South West Algeria)

Energy Procedia

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Etude hygroscopique des feuilles de Kabar (Caparis Spinosa L.) en vue de leur séchage

Moisture sorption-isotherms and isosteric heat of henna leaves ( Lawsonia inermis.L) harvested in the Algerian Sahara

Journal of Engineering Physics and Thermophysics

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Mathematical Modeling of Moisture Sorption Isotherms and Determination of Isosteric Heats of Sorption of Ziziphus Leaves

Modelling and Simulation in Engineering, 2014

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