Publications by authors named "Salwa El Sayed"

Valorization of poultry waste is a significant challenge addressed in this study, which aimed to produce cost-effective and sustainable peptones from poultry waste. The isolation process yielded the highly potent proteolytic B.subtilis isolate P6, identified through 16S rRNA gene sequencing to share 94% similarity with the B.

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  • Nanoparticles, particularly silver nanoparticles (AgNPs), are being explored as eco-friendly alternatives to traditional chemical control agents, with this study specifically focusing on biosynthesizing AgNPs using the peels of the tomato plant (Lycopersicon esculentum).
  • The synthesis of AgNPs was indicated by a color change of the tomato peel extract, and their properties were analyzed using various spectral and imaging techniques, revealing nanoparticles of around 186 nm in size and demonstrating high stability.
  • The study found Le-AgNPs effective against bacteria and fungi, particularly inhibiting Bacillus subtilis and Alternaria solani, while also noting the cytotoxic effects at certain concentrations.
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  • The study focused on optimizing carotenoid pigment production from Micrococcus luteus by testing various media components, achieving a yield of 2.19 g/L through a controlled experimental design.
  • Analysis of the produced carotenoids showed moderate antimicrobial activity against certain Gram-positive bacteria, along with notable antioxidant properties, although their effectiveness against Gram-negative bacteria was limited.
  • The carotenoid extracts demonstrated low cytotoxicity with over 68% cell viability in normal mouse liver cells, while histological studies indicated normal tissue structures with some signs of damage in liver tissue.
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Mosquitoes prefer stagnant areas near hospitals to live and easily spread pathogenic bacteria. Our current study aims to isolate multidrug-resistant (MDR) Staphylococcus aureus isolates from midguts of Mosquito Culex pipiens and study the potential of mint as a biocontrol strategy against C. pipiens larvae and their midgut-borne S.

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Polyphenolics have been predicted to effectively develop antimicrobial agents for the food industry as food additives and promote human health. This study aims to synthesize pomegranate peel extract (PPE) with silver nanoparticles (AgNPs) against eight foodborne pathogens. Multispectroscopic analysis of UV-vis spectroscopy, Zeta potential, Fourier transform infrared (FTIR) and scanning electron microscopy (SEM) analysis were used to characterize the interaction between PPE and AgNPs.

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Food waste is a major issue, with one-third of food wasted yearly. This study aimed to produce sustainably the industrial enzyme alpha-amylase using discarded bread waste. Brown (BBW) and white bread waste (WBW) were tested as growth substrates using solid-state and submerged fermentation.

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Mosquito control in Egypt depends on applying chemical synthetic pesticides that impact negatively on human health and the environment as well as the development of antibiotic and chemical resistance. This study aims to control the 3rd and 4th instars of Culex pipiens larvae using four bacterial strains. According to Phenotypic and molecular identification, the four isolates were identified as Bacillus subtilis MICUL D2023, Serratia marcescens MICUL A2023, Streptomyces albus LARVICID, and Pseudomonas fluorescens MICUL B2023.

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The emergence of antimicrobial resistance in foodborne bacterial pathogens has raised significant concerns in the food industry. This study explores the antimicrobial potential of biosynthesized silver nanoparticles (AgNPs) derived from Agaricus bisporus (Mushroom) against foodborne bacterial pathogens. The biosynthesized AgNPs were characterized using various techniques, including UV-visible spectroscopy, X-ray diffraction, Fourier transform infrared spectroscopy, high-resolution scanning electron microscopy with energy dispersive X-ray spectroscopy, dynamic light scattering, and zeta potential analysis.

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  • Researchers are exploring biocontrol agents to combat deteriorative fungi and bacteria on Egyptian stone monuments, aiming to avoid the toxic effects of chemicals.
  • Three fungal and one bacterial isolates were identified from samples taken at the Temple of Hathor, demonstrating effective inhibition of these pathogens with a minimum inhibition concentration of 25%.
  • The metabolites from Streptomyces exfoliatus were found to be safe for human skin cells and showed no damage to the limestone monuments, suggesting a viable method for preserving these historical sites.
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is a medicinal plant that produces indole alkaloids, which are utilized in anticancer therapy. Vinblastine and vincristine, two commercially important antineoplastic alkaloids, are mostly found in the leaves of . ĸ-carrageenan has been proven as plant growth promoting substance for a number of medicinal and agricultural plants.

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Faba beans are among the legumes that are of the greatest importance due to their high nutritional value. In addition to the essential nutrients that faba beans contain, they also contain bioactive compounds such as phenolics and flavonoids that are considered as potent natural antioxidants. Ulcerative colitis (UC) is an inflammatory bowel disease in which oxidative stress plays an essential role in the pathophysiology.

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Malachite green (MG) dye is a common environmental pollutant that threatens human health and the integrity of the Earth's ecosystem. The aim of this study was to investigate the potential biodegradation of MG dye by actinomycetes species isolated from planted soil near an industrial water effluent in Cairo, Egypt. The isolate St 45 was selected according to its high efficiency for laccase production.

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Plant growth regulators can affect the primary and secondary metabolites of various plant species. However, the effect of paclobutrazol (PBZ) on the composition of lavender oil, especially related to the terpenoid pathway, is still unclear in literatures. In this study, the effect of PBZ as a foliar spray (0.

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The goal of the present investigation was to study the effect of pH on growth and biochemical responses of Dunaliella bardawil and Chlorella ellipsoidea when exposed to different pH values. The two tested microalgae could grow in a wide range of pH (4-9 for D. bardawil and 4-10 for C.

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Purpose: To determine the role of RPLND for residual masses following chemotherapy in patients with non-seminomatous germ cell tumors (NSGCT) stage T1N2 and T1N3 (IIB and IIC).

Materials And Methods: We have preformed retrospective analysis of 11 patients who underwent RPLND for residual masses following chemotherapy in an oncologic reference center between January 1997 and December 2002. All patients harbored either pure nonseminomatous or mixed tumors in the testis tissue and had undergone 4 cycles of primary chemotherapy with bleomycin, etoposide and cisplatin.

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