Ayda Khadhri
Tunis University
SalinityHorticultureChemical compositionDry weightComposition (visual arts)ChemistryEssential oilAntioxidantFlavonoidAcetoneDPPHCymbopogon schoenanthusFood scienceChromatographyAntimicrobialYield (chemistry)Traditional medicineBotanyAgronomyPolyphenolProanthocyanidinBiology
29Publications
9H-index
171Citations
Publications 29
Newest
#2Chedia Aouadhi (Tunis El Manar University)H-Index: 12
Last. Ayda KhadhriH-Index: 9
view all 0 authors...
In this study, we develop here for the first time an easy, eco-friendly method for synthesizing silver nanoparticles (AgNPs) using the lichen Roccella phycopsis. AgNPs formation was first determined by a color change of the lichen filtrate to brown, subsequent to addition of AgNO3 solution, and confirmed by a maximum absorbance peak at 425 nm in UV-vis spectrum. Scanning electron microscope images showed a spherical shape with a size distribution between 11 and 18 nm, while the elemental composi...
Source
#1Mohamed Mendili (Tunis University)H-Index: 1
#2Mark R. D. Seaward (University of Bradford)H-Index: 27
Last. Ayda Khadhri (Tunis University)H-Index: 9
view all 3 authors...
The effects of the lichenicolous fungus Heterocephalacria bachmannii on the antimicrobial potential of the lichen Cladonia foliacea demonstrated that the extracts investigated have antimicrobial potential against gram-positive and negative bacteria, and yeast, and inhibit the germination of fungal spores. Inhibition activity varied considerably depending on the extract, the bacterial species, and the absence or presence of H. bachmannii; unparasitised C. foliacea has a higher antimicrobial activ...
Source
Two extraction schemes, conventional and high-pressure extraction methods were applied on Calligonum azel Maire leaves and roots, with purpose to exploit this plant as a source of natural antioxidants. The total phenolic content (TPC), trolox equivalent antioxidant capacity (TEAC) of extracts, and solid materials were determined. Varying yields of active fractions were obtained by consecutive extractions with increasing polarity solvents. In the Soxhlet extraction, the highest antioxidant capaci...
Source
#1Mohamed Mendili (Tunis University)H-Index: 1
#2Marwa Bannour (Tunis University)H-Index: 5
Last. Ayda Khadhri (Tunis University)H-Index: 9
view all 5 authors...
The phenolic composition and antioxidant capacity of four Tunisian lichen species, Cladonia rangiformis, Flavoparmelia caperata, Squamarina cartilaginea and Xanthoria parietina, were determined in order to provide a better understanding of their lichenochemical composition. Powdered material of F. caperata was the richest in total phenolic content (956.68 μg GAE g-1 DW) and S. cartilaginea in proanthocyanidin content (77.31 μg CE g-1 DW), while the acetone extract of X. parietina showed the high...
Source
#1Mohamed Mendili (Tunis University)H-Index: 1
#2B Essghaier (Tunis University)
Last. Ayda Khadhri (Tunis University)H-Index: 9
view all 4 authors...
Since lichens have been recognised as a potential natural source of bioactive substances, the aim of this study was to investigate the antimicrobial, lysozyme and antifungal effects of methanol, acetone and quencher extracts from four lichens: Diploschistes ocellatus, Flavoparmelia caperata, Squamarina cartilaginea and Xanthoria parietina. The results showed that the tested extracts had antimicrobial activity against Gram-positive and Gram-negative bacteria and anti-candida, and inhibit the spor...
Source
#2Mohamed Ali Smach (University of Sousse)H-Index: 5
Last. Ayda KhadhriH-Index: 9
view all 4 authors...
Background: Maclura pomifera a member of Moraceae family, is a tropical plant with ethnobotanical uses. Objectives: The present study aimed to evaluate bioactive compounds, antioxidants, and acetylcholinesterase (AChE) inhibitory activities of different extracts of Tunisia M. pomifera (Rafin.) Schneid fruit in vitro and in vivo. Methods: Organic extracts in different polarities (chloroform, ethyl acetate, and acetone) were extracted from different parts of the fruit of M. pomifera (exocarp, meso...
Source
#1Ghofrane Jmii (University of Sousse)H-Index: 1
#2Ayda Khadhri (Tunis University)H-Index: 9
Last. Rabiaa Haouala (University of Sousse)H-Index: 13
view all 3 authors...
Abstract Thapsia garganica phytotoxicity was studied on Lactuca sativa L. and associated weeds, by pulverization of its aqueous extracts (at 10, 20, and 30 %), in pot experiments. To comprehend its mode of action on lettuce, seedlings were grown hydroponically in Hoagland nutrient solution for two months, then the T. garganica leaves aqueous extract was added to the medium for three days. After the harvest, a number of physiological and biochemical parameters had been determined. The antioxidant...
3 CitationsSource
#1Ayda Khadhri (Tunis University)H-Index: 9
#2Mohammed Mendili (Tunis University)H-Index: 1
Last. Mark R. D. Seaward (University of Bradford)H-Index: 27
view all 4 authors...
The phenolic, flavonoid, tannin and proanthocyanidin content of the lichen Cladonia foliacea with and without its lichenicolous fungus Heterocephalacria (Syzygospora) bachmannii was investigated. The phenolic compounds were quantified in organic extracts using ultrasonic extraction (acetone and methanol) and in milled material (the ground material diluted with microcrystalline cellulose). The total phenolic content depended on the solvent polarity, the extraction technique and the species. The r...
3 CitationsSource
#1Ayda KhadhriH-Index: 9
#2Intidhar BoualiH-Index: 3
Last. Antonio Pizzi (University of Lorraine)H-Index: 79
view all 6 authors...
: This study aimed to investigate the effect of the maturation process of sweet marjoram (Origanum majorana L.) on essential oil composition, the phenolic profile of ethanolic extract and their antioxidant capacities. The essential oil composition was studied at three stages of maturity by GC-MS. Thirty compounds were detected representing 100% of the total essential oil. p-Menth-1-en-4-ol was the major compound (37.15-76.94%) followed by cyclohexanol-3,3,5 trimethyl (5.41-15.99%) and α-terpineo...
3 CitationsSource
AbstractThe composition and antioxidant activity of the essential oil of Carya illinoinensis were evaluated in this research. The yield of essential oils from three varieties was found to vary from...
Source