Publications by authors named "Kamel Msaada"

The chemical composition of the essential oil isolated from the aerial parts of Teucrium aureo-candidum, an endemic aromatic shrub collected from Moghrar and Djeniene Bourezg in the Nâama region (Algeria), was determined for the first time using GC/FID and GC/MS. A total of 45 constituents were identified, representing 87.73 % of the oil.

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Onions contain valuable phytochemical compounds, including quercetin derivatives. This study explores the potential of onion extract as a natural additive in chicken patties. The optimized conditions involved sonication at 80% for 5 min with a 75% ethanol concentration.

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Article Synopsis
  • * A study on hazelnut, peanut, and almond by-products found that their extracts have antioxidant, antimicrobial, anti-inflammatory, and antiviral benefits, with more active compounds in the teguments than in the shells.
  • * The Achak almond tegument extract showed strong effects against radicals and microbes, as well as antiviral properties, indicating that these by-products could contribute to sustainable product development in the dried fruit industry.
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Exploration of the hydroethanolic extracts from the halophyte , led to the isolation of seven phenolic compounds: gallic acid, epigallocatechin gallate (EGCG), quercitrin, a mixture of myricetin 3--α-rhamnopyranoside + myricetin 3--L-arabinofuranoside, dihydrokaempferol, pinoresinol, and -N-ferulolyl tyramine. These compounds were assessed for anticancer, anti-influenza A virus, antioxidant, and anti-inflammatory properties. The results indicated that these compounds do not exhibit toxicity towards healthy cells (WS-1 and MDCK).

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This study endeavoured to capitalize on prickly pear by-products for the optimization of molasses formulation, targeting elevated antioxidant capacities and superior sugar contents. Through robust statistical modelling, the optimal cooking parameters-temperature (70-80 °C) and duration (60-90 min)-were determined, guided by responses of antioxidant activity and Brix value. A D-Optimal mixture design further delineated the ideal proportions of molasses components (pulp, peel, and seeds).

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  • - The study analyzed extracts of cypress from three regions in Tunisia (Bizerte, Ben Arous, and Nabeul) for their antioxidant and antibacterial properties, as well as their phenolic content.
  • - Bizerte's methanol extract showed the highest phenolic content (315.75 mg GAE/g DW), with cupressuflavone being the main compound (68%).
  • - The ethanol extract from Nabeul was particularly effective against Gram-positive bacteria, showing a significant inhibition zone of 40 mm, highlighting cypress as a promising source for natural antioxidants and antibacterial agents.
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This study delved into the incorporation of wild nettle ( L.) leaves powder with virgin olive oil, exploring its potential to enhance nutritional value and health benefits. The antioxidant, antibacterial, and mineral-enrichment attributes of the resultant nettle-infused olive oil were investigated.

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Formulating a nanoemulsion (NE) of essential oil (EO) could enhance its efficiency while requiring lower concentrations. F. Muell EO was rich in monoterpenes hydrocarbons.

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The amalgamation of garlic's antibacterial potency with olive oil's nutritional benefits provides a natural, effective way to boost health and counters microbial threats. This study explored the antioxidant and antibacterial traits of garlic-enriched virgin olive oil (VOO) samples, focusing on various garlic forms (fresh, oven-dried, freeze-dried). Comparative analysis revealed fresh garlic's highest total phenolic content, flavonoid content, and strongest DPPH scavenging activity.

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L. is a halophytic medicinal shrub traditionally used in the treatment of liver disorders. Leaf and flower infusions are widely used for anti-diarrheic and anti-inflammatory preparations.

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The current study aimed to evaluate Tunisian Tamarix africana Poir biological activities. In this study, novel biological activities of the shoot extracts related to their phenolics investigated. Secondary metabolite contents, antioxidant, anti-inflammatory and cytotoxic activities of four extracts (hexane, dichloromethane, methanol and water) were investigated.

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  • * Pretreatment with TAEO emulsion increases the activity of antioxidant enzymes (SOD, CAT, APX, GPX) and boosts total polyphenol content, improving the antioxidant status in infected tomato plants.
  • * Key defense genes (like SlChi, SlWRKY, and SlLOX) are significantly up-regulated within 12 hours of infection, indicating that TAEO emulsion can stimulate both antioxidant responses and gene activation in tomato plants.
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The goal of this study was to determine for the first time the polyphenol content, antioxidant, and gastroprotective properties of the roots and leaves of . TPC considerably varied as a function of organs and solvent nature and ranged from 50 to 284.80 mg GAE/g DW.

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The essential oils (EOs) of , and have been screened for their insecticidal activity against , and and for their antimicrobial activity against Gram (+), Gram (-) bacteria and against yeast strain. EO showed good insecticidal activity with 24-h against (LC = 29.7) and against (66.

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This study was designed to evaluate the antioxidant and antimicrobial activity of ethanolic extracts (EEs) of and . showed the highest values of phenolic compounds. Further, it was shown that EE of displayed the highest DPPH (IC50 = 8.

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The present study provides the fatty acid, tocopherol, phytosterol, and polyphenol profiles of some Mediterranean oils extracted from pumpkin, melon, and black cumin seed oils and those of dietary argan seed oil. Gas chromatography analysis revealed that oleic and linoleic acids were the most abundant fatty acids. Argan and melon seed oils exhibited the highest levels of oleic acid (47.

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  • The study investigates how the maturity stages of citron fruit affect the quantity and quality of its essential oil (EO), analyzing four stages: green mature, intermediate, yellow ripe, and overripe.
  • Results showed that EO concentration ranged from 0.60% to 0.77%, with the highest limonene content (89.39%) found in the green mature stage, which decreases as the fruit ripens.
  • The overripe stage exhibited the highest antioxidant activity (76.08%), suggesting that specific compounds and their interactions contribute to the health benefits of the fruit, indicating the best time for harvest to maximize bioactive substances.
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This study investigated composition and toxicity of Thyme EOs against two main stored grain insect pests. Carvacrol was distinguished as a major compound (78.34%).

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This research aimed to study the chemical composition of   methanolic extract and its biological activities as an antioxidant, and its antibacterial, antifungal and anti-inflammatory activities based on four bioclimatic collection stages. The contents of total phenols, total flavonoids and total tannins were determined. Nine phenolic compounds were identified by LC-DAD-ESI-MS/MS.

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  • This research focused on analyzing the chemical compositions and biological effects of essential oils (EOs) from different needle types, finding significant variability in their profiles.
  • Key compounds identified include caryophyllene, phenyl isovalerate, β-myrcene, and α-pinene, with their specific concentrations measured.
  • Notably, the EO from Tabouba showed the highest antioxidant and anti-inflammatory activities, while Kettana's EO demonstrated strong cytotoxic effects against breast cancer cells, suggesting potential health benefits of these EOs as bioactive sources.
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A comparative study of bioactive lipids extraction from black cumin ( L.) and basil ( L.) seeds using conventional petroleum-based solvent and green solvent 2-methyltetrahydrofuran (MeTHF) was performed.

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  • The study explores the use of green extraction methods, specifically supercritical carbon dioxide (Sc-CO₂) and 2-methyltetrahydrofuran (MeTHF), to extract bioactive lipids from Carum carvi seeds, highlighting their nutritional benefits.
  • The findings reveal that MeTHF extraction yields more oil compared to conventional hexane extraction while maintaining a similar fatty acid profile, and enriching the oil with beneficial bioactive compounds.
  • The green extraction methods demonstrate significant antioxidant and anti-inflammatory properties, suggesting their superiority over traditional methods in producing health-promoting oils from carvi seeds.
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To highlight the importance of the spices in the Mediterranean diet, the aim of the paper was to study the essential oil compositions and to clarify the potential differences in the biological activities of the three cardamom species. In the study, we compared the phytochemical profiles and biological activities of essential oils from , and . The oils were analyzed using the GC and GC/MS techniques and were mainly constituted of the oxygenated monoterpenes which represents 71.

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In this study, the effects of salinity on growth, fatty acid, essential oil, and phenolic composition of cumin (Cuminum cyminum L.) seeds as well as the antioxidant activities of their extracts were investigated. Plants were treated with different concentrations of NaCl treatment: 0, 50, 75, and 125 mmoL.

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This study was carried out with the objective to investigate the antibacterial activity of Hertia cheirifolia L. extracts against Gram-positive and Gram-negative strains including Staphylococcus aureus (ATCC 6538), Bacillus subtilis (ATCC 6633), Bacillus licheniformis, Esherichia coli (ATCC 8739), Pseudomonas aeruginosa (ATCC 9027), Salmonella enterica (CIP 8039) and Salmonella typhimirium. The results of this antibacterial screening showed that the ethyl acetate (EtOAc) extracts had the best activity against the tested microorganisms.

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