Journal ArticleDOI
Synthesis of silver nanoparticles using natural pigments extracted from Alfalfa leaves and its use for antimicrobial activity
Ahmad Baraka,Sarah E. Dickson,Mohamed Gobara,Gharieb S. El-Sayyad,Mahmoud Y. Zorainy,Mohamed Awaad,Hussien Hatem,Mohamed Mokhtar Kotb,A. F. Tawfic +8 more
TLDR
In this article, the synthesis and characterization of silver nanoparticles (AgNPs) using natural pigments from plants as reducing agents is presented. And the reduction is suggested to occur, mainly, by chlorophyll a and carotenes.Abstract:
The synthesis and characterization of silver nanoparticles (AgNPs) using natural pigments from plants as reducing agents is presented in this study. The natural pigments were extracted from Alfalfa leaves. The reduction reaction was investigated by UV–Vis and FTIR analyses. The synthesized AgNPs were characterized by UV–Vis, XRD, TEM, and DLS. UV–Vis analysis revealed that AgNPs were produced with a persistent plasmonic absorption peak at about 418 nm accompanied by consumption of pigments. The reduction is suggested to occur, mainly, by chlorophyll a and carotenes. Characterization revealed pure synthesized AgNPs with an average particle size of 25 nm. In an interesting novel experiment, the progress of reduction reaction was traced at the interface between reacting phases under UV illumination making use of fluorescence of both chlorophylls and formed Ag nano-clusters (AgNCs). The enrollment of chlorophylls in reduction was suggested depending on FTIR and fluorescence analyses. The synthesized AgNPs possessed a superior antimicrobial activity towards Staphylococcus aureus ATCC 29213; 24.0 mm ZOI, followed by Escherichia coli ATCC 25922; 17.0 mm ZOI. In addition, AgNPs were a strong antifungal agent against Candida albicans ATCC 10231; 26.0 mm ZOI.read more
Citations
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Journal ArticleDOI
Antimicrobial activity of metal-substituted cobalt ferrite nanoparticles synthesized by sol–gel technique
A. H. Ashour,Ahmed I. El-Batal,M. I. A. Abdel Maksoud,Gharieb S. El-Sayyad,Sh. Labib,E. Abdeltwab,Mohamed El-Okr +6 more
TL;DR: The surface area of zinc cobalt ferrite nanoparticles (ZCFO) was 52.56m2/g, the average pore size was 1.84nm, and pore volume was 0.136mL/g.
Journal ArticleDOI
Therapeutic and diagnostic potential of nanomaterials for enhanced biomedical applications.
M. Abd Elkodous,Gharieb S. El-Sayyad,Ibrahim Y. Abdelrahman,Hanan S. El-Bastawisy,Abd Elrahman Mohamed,Farag M. Mosallam,Hebatallah A. Nasser,Mohamed Gobara,Ahmad Baraka,Mohamed A. Elsayed,Ahmed I. El-Batal +10 more
TL;DR: This review presents, analyzes and provides significant insights and recent advances about the promising biomedical applications of nanoparticles including bioimaging of biological environments and its role as a significant tool for early detection of many diseases with respect to traditional means.
Journal ArticleDOI
Synthesis and characterization of metals-substituted cobalt ferrite [Mx Co(1-x) Fe2O4; (M = Zn, Cu and Mn; x = 0 and 0.5)] nanoparticles as antimicrobial agents and sensors for Anagrelide determination in biological samples
M. I. A. Abdel Maksoud,Gharieb S. El-Sayyad,A. H. Ashour,Ahmed I. El-Batal,Mahmmoud S. Abd-Elmonem,Hassan A. M. Hendawy,E. K. Abdel-Khalek,Sh. Labib,E. Abdeltwab,Mohamed El-Okr +9 more
TL;DR: The improvement of a screen-printed sensor, modified with ferrite NPs materials for rapid, sensitive and cost-effective quantification of Anagrelide-HCl present in the real samples such as blood serum samples, urine and in the pharmaceutical formulations are described.
Journal ArticleDOI
Antibacterial, antibiofilm, and photocatalytic activities of metals-substituted spinel cobalt ferrite nanoparticles.
M. I. A. Abdel Maksoud,Gharieb S. El-Sayyad,A. H. Ashour,Ahmed I. El-Batal,Mohamed A. Elsayed,Mohamed Gobara,Ahmed M. El-Khawaga,E. K. Abdel-Khalek,Mohamed El-Okr +8 more
TL;DR: The photocatalytic degradation of Methylene Blue (MB) dye (a class of dyestuffs that are resistant to biodegradation) under the influence of UV-light irradiation is reported.
Journal ArticleDOI
Biomolecules-mediated synthesis of selenium nanoparticles using Aspergillus oryzae fermented Lupin extract and gamma radiation for hindering the growth of some multidrug-resistant bacteria and pathogenic fungi.
TL;DR: Depending on the unique characteristics, and the novelty in biosynthesis process of SeNPs, it must be candidates in biomedicine, prevent food spoilage, cosmetics, and pharmaceutics as green antimicrobial agent.
References
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Journal ArticleDOI
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Journal ArticleDOI
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Journal ArticleDOI
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Journal ArticleDOI
Spectrophotometric characteristics of chlorophylls a and b and their pheophytins in ethanol.
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