Publications by authors named "Walid Elfalleh"

Pistacia atlantica and Oudneya africana are medicinal plants from arid Tunisian regions, traditionally used for their therapeutic properties. This study comparatively evaluated their ethanol and aqueous leaf extracts for phytochemical content and biological activities. LC-ESI-MS identified 19 bioactive compounds, including flavonoids and phenolic acids.

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This study aimed to evaluate the anti-inflammatory properties of L. root juice (CRJ), which is used in the traditional medicine of Algeria. The product was characterized by colorimetric assays (total polyphenols, flavonoids, and tannins) and by RP-HPLC-DAD analysis.

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This study investigates the development of biodegradable composite films (F) based on gelatin (G), reinforced with smectite (Sm) and illite (IL) clays as fillers within the biopolymer matrix. A comprehensive set of characterization techniques was employed to evaluate the structural, thermal, mechanical, and barrier properties of the films. Mechanical testing revealed that incorporating 5 % clay significantly enhanced TS while reducing EAB compared to the control.

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Novel derivatives of imidazolium-based ionic liquids with varying alkyl chains, IL-1, IL-2, and IL-3, were evaluated as corrosion inhibitors for mild steel in 1 M HCl solution. The experimental investigations used Electrochemical Impedance Spectroscopy (EIS) and potentiodynamic polarization (PDP) techniques. The results demonstrated exceptional corrosion inhibition efficiency (>90%), as classified by electrochemical analyses, which identified these corrosion inhibitor compounds as mixed-type.

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In the current research, we examined the effects of warfarin (W1 = 5 mg/L and W2 = 25 mg/L) and tinzaparin (T1 = 5 mg/L and T2 = 25 mg/L) on meiofauna using microcosms. These microcosms were intentionally contaminated with both anticoagulants for one month. The findings indicated that nematodes and amphipods demonstrated the greatest resistance to the two anticoagulants evaluated.

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Ionic liquids (ILs) have recently attracted significant attention in many domains, particularly as potential corrosion inhibitors owing to their outstanding properties, including low vapor pressure, high thermal and chemical stability, and the ability to be tailored for specific applications. Their effectiveness results mainly from their ability to strongly interact with metal surfaces, often electrostatic and chemical interactions, thereby forming a protective barrier against corrosion. This study investigated three ionic liquids (ILs), namely, 3-(5-ethoxy-5-oxopentyl)-1-phenethyl-1-imidazol-3-ium bromide ([5E5O-Imid] Br), 3-(6-ethoxy-6-oxohexyl)-1-phenethyl-1-imidazol-3-ium bromide ([6E6O-Imid] Br), and 3-(4-acetoxybutyl)-1-phenethyl-1-imidazol-3-ium bromide ([4AB-Imid] Br).

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In the current study, the mussels Mytilus galloprovincialis, exposed to four varying temperatures (17, 20, 23, and 26 °C), were contaminated with 50 μg/L of bisphenol A both with and without Nannochloropsis salina. The toxicity evaluation is determined by quantifying various biomarkers related to oxidative stress, neurotoxicity, and cellular damage. The key findings indicate that the toxicity of bisphenol A is heightened by rising temperature.

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This experiment examined the individual and combined effects of the antidepressant paroxetine and zinc on copepods and amphipods collected from Jeddah coast in Saudi Arabia. Various treatments were tested, revealing a decline in the abundance and diversity of both groups. Specific sensitivities were noted for copepods: Amphiascus parvulus was particularly affected by paroxetine, while Harpacticus littoralis, Harpacticus gracilis, and Heterolaophonte stroemii stroemii showed increased sensitivity to zinc.

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Given consumers', environmental and sustainability apprehensions, the meat industry investigated the natural colorant resources. As proof, betalain, peels (OSP) pigment, is premeditated in the meat industry. Here, OSP betalains were qualitatively profiled using UPLC-MS/MS, and 7 metabolites were identified: 6 betacyanins and a betaxanthin (arginine-betaxanthin).

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is a plant genus that includes annual and perennial species and is found at various temperatures, from northern temperate regions to tropical and subtropical areas. The genus has been used for centuries for various disorders, including hypertension, intestinal and stomach pain, dysuria, jaundice, toothaches, skin allergies, hemorrhoids, cardiac disorders, kidney stones, hemostasis, hyperglycemia, and others. Various databases, including Google Scholar, Scifinder, ScienceDirect, PubMed, Scopus, ResearchGate, and Web of Science, were utilized to collect pertinent scientific literature data.

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The cultivation of carob tree does not need many climatic and ecological requirements. The main limit to its large-scale cultivation is the defects for propagation with seeds. Addressing this, our study evaluated the effect of cold plasma pretreatment on carob seed germination.

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This work presents the biocidal effects and chemical compositions of two essential oils (EOs) obtained by hydrodistillation of subsp and subsp. . The two subspecies studied had different chemical composition, when analysed by gas chromatography coupled to mass spectrometry with 1,8-cineole (56.

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Article Synopsis
  • Sn-Glycerol-3-phosphatidylcholine (GPC) was synthesized from phosphatidylcholine (PC) using phospholipase A (PLA) in a hydrolysis reaction, leading to the production of conjugated linoleic acid lysophosphatidylcholine (LPC-CLA) through esterification with conjugated linoleic acid (CLA).
  • * The study explored how different conditions, like enzyme concentration, pH, temperature, and time, affected the conversion of PC and the rates at which acyl groups migrated.
  • * The best conditions found for maximum esterification were an enzyme loading of 15%, a CLA/GPC molar ratio of 50:1, and specific pressure settings,
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Article Synopsis
  • * Different ultrasonic power levels were tested, with 400 W yielding the best results in terms of particle size (146.86 nm), zeta potential (-20.7 eV), and protein content (61.91%).
  • * The ultrasonic treatment significantly enhanced the emulsions' physicochemical properties, stability, and resistance to thermal, salt, pH, and oxidative conditions.
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Emulsion stability and sustained-release can be improved with a non-covalent complexing of a soybean protein isolate (SPI) with -tannic acid (TA) and dynamic high-pressure microfluidization (DHPM). The microstructure, physicochemical properties, and interfacial properties were investigated. The properties of the DHPM-treated emulsions were improved significantly, with the 120 MPa DHPM-treated SPI-TA emulsion (SPI-TA 120) having the best microstructure.

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Phytochemical screening of aqueous extract from six medicinal wild plants grown in South-eastern of Tunisia: Atriplex halimus, Teucrium polium, Moricandia arvensis, Deverra tortuoa, Haplophyllum tuberculatum and Polygonum equisetiforme were evaluated. Both decoction and ultrasound assisted extraction were used. Antioxidant, antibacterial proprieties, and phenolic profiling, using LC-ESI-MS method, were assessed.

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In this study, the antioxidant activities and detailed phenolic profiling of extracts from seven cultivars of date seeds were investigated. Significant differences were detected among cultivars. Total phenolic content (TP) ranged between 135.

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The genus has various medicinal values. Species belonging to this genus were traditionally used as drugs or in food. The current study aimed to determine the phytochemical composition, antioxidant activity, and biological properties of the tuber, leaf, and flower of extracts, collected from the southwest of Tunisia.

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Nowadays, in parallel to the appearance of the COVID-19 virus, the risk of viruses in water increases leading to the necessity of developing novel disinfection methods. This review focuses on the route of virus contamination in water and introduces non-thermal plasma technology as a promising method for the inactivation of viruses. Effects of essential parameters affecting the non-thermal discharge for viral inactivation have been exposed.

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In this work, we present the influence of the decoration of TiO nanotubes (TiO-NTs) with Ag silver nanoparticles (Ag-NPs) on the photocatalysis of emerging pollutants such as the antibiotic diclofenac sodium. The Ag-NPs were loaded onto the TiO-NTs by the anodization of metallic titanium foils. Diclofenac sodium is an emerging pollutant target of the pharmaceutical industry because of its negative environmental impact (high toxicity and confirmed carcinogenicity).

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Unlabelled: In this paper, the free Phospholipase A (PLA) was immobilized on a magnetic carrier. The average particle diameter of the magnetic carrier was 97 ± 1.3 nm, and the average particle diameter of the magnetically immobilized PLA was 105 nm ± 1.

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Although several non-thermal plasmas (NTPs) technologies have been widely investigated in air treatment, very few studies have focused on the inactivation mechanism of viruses by NTPs. Due to its efficiency and environmental compatibility, non-thermal plasma could be considered a promising virus-inactivation technology. Plasma is a partly or fully ionized gas including some species (i.

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Magnetically immobilized papain is prepared by magnetic FeO/P (GMA-EDGMA-St) composite carrier with the addition of 12.0 mg/mL papain, 5.0% glutaraldehyde and 4 hour reaction time.

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