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Dr. Ehab El-Belely
Algae lab, Botany and Microbiology Dept., Faculty of Science, Al-Azhar University

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0 Algae
0 Biostatistics
0 Nanotechnology
0 Marine Ecology
0 Ecology and Biodiversity

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Journal article
Published: 04 January 2021 in Nanomaterials
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In this study, zinc oxide nanoparticles (ZnO-NPs) were successfully fabricated through the harnessing of metabolites present in the cell filtrate of a newly isolated and identified microalga Arthrospira platensis (Class: Cyanophyceae). The formed ZnO-NPs were characterized by UV–Vis spectroscopy, Fourier transform infrared (FT-IR), transmission electron microscopy (TEM), energy-dispersive spectroscopy (EDX), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Data showed the efficacy of cyanobacterial metabolites in fabricating spherical, crystallographic ZnO-NPs with a size ≈30.0 to 55.0 nm at a wavelength of 370 nm. Moreover, FT-IR analysis showed varied absorption peaks related to nanoparticle formation. XPS analysis confirms the presence of Zn(II)O at different varied bending energies. Data analyses exhibit that the activities of biosynthesized ZnO-NPs were dose-dependent. Their application as an antimicrobial agent was examined and formed clear zones, 24.1 ± 0.3, 21.1 ± 0.06, 19.1 ± 0.3, 19.9 ± 0.1, and 21.6 ± 0.6 mm, at 200 ppm against Bacillus subtilis, Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, and Candida albicans, respectively, and these activities were reduced as the NPs concentration decreased. The minimum inhibitory concentration (MIC) values were determined as 50 ppm for S. aureus, 25 ppm for P. aeruginosa, and 12.5 ppm for B. subtilis, E. coli, and C. albicans. More interestingly, ZnO-NPs exhibit high in vitro cytotoxic efficacy against cancerous (Caco-2) (IC50 = 9.95 ppm) as compared with normal (WI38) cell line (IC50 = 53.34 ppm).

ACS Style

Ehab F. El-Belely; Mohamed M. S. Farag; Hanan A. Said; Abeer S. Amin; Ehab Azab; Adil A. Gobouri; Amr Fouda. Green Synthesis of Zinc Oxide Nanoparticles (ZnO-NPs) Using Arthrospira platensis (Class: Cyanophyceae) and Evaluation of their Biomedical Activities. Nanomaterials 2021, 11, 95 .

AMA Style

Ehab F. El-Belely, Mohamed M. S. Farag, Hanan A. Said, Abeer S. Amin, Ehab Azab, Adil A. Gobouri, Amr Fouda. Green Synthesis of Zinc Oxide Nanoparticles (ZnO-NPs) Using Arthrospira platensis (Class: Cyanophyceae) and Evaluation of their Biomedical Activities. Nanomaterials. 2021; 11 (1):95.

Chicago/Turabian Style

Ehab F. El-Belely; Mohamed M. S. Farag; Hanan A. Said; Abeer S. Amin; Ehab Azab; Adil A. Gobouri; Amr Fouda. 2021. "Green Synthesis of Zinc Oxide Nanoparticles (ZnO-NPs) Using Arthrospira platensis (Class: Cyanophyceae) and Evaluation of their Biomedical Activities." Nanomaterials 11, no. 1: 95.

Journal article
Published: 01 January 2021 in Plants
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In this study, 15 bacterial endophytes linked with the leaves of the native medicinal plant Pulicaria incisa were isolated and identified as Agrobacterium fabrum, Acinetobacter radioresistant, Brevibacillus brevis, Bacillus cereus, Bacillus subtilis, Paenibacillus barengoltzii, and Burkholderia cepacia. These isolates exhibited variant tolerances to salt stress and showed high efficacy in indole-3-acetic acid (IAA) production in the absence/presence of tryptophan. The maximum productivity of IAA was recorded for B. cereus BI-8 and B. subtilis BI-10 with values of 117 ± 6 and 108 ± 4.6 μg mL−1, respectively, in the presence of 5 mg mL−1 tryptophan after 10 days. These two isolates had a high potential in phosphate solubilization and ammonia production, and they showed enzymatic activities for amylase, protease, xylanase, cellulase, chitinase, and catalase. In vitro antagonistic investigation showed their high efficacy against the three phytopathogens Fusarium oxysporum, Alternaria alternata, and Pythium ultimum, with inhibition percentages ranging from 20% ± 0.2% to 52.6% ± 0.2% (p ≤ 0.05). Therefore, these two endophytic bacteria were used as bio-inoculants for maize seeds, and the results showed that bacterial inoculations significantly increased the root length as well as the fresh and dry weights of the roots compared to the control plants. The Zea mays plant inoculated with the two endophytic strains BI-8 and BI-10 significantly improved (p ≤ 0.05) the growth performance as well as the nutrient uptake compared with an un-inoculated plant.

ACS Style

Amr Fouda; Ahmed M. Eid; Albaraa Elsaied; Ehab F. El-Belely; Mohammed G. Barghoth; Ehab Azab; Adil A. Gobouri; Saad El-Din Hassan. Plant Growth-Promoting Endophytic Bacterial Community Inhabiting the Leaves of Pulicaria incisa (Lam.) DC Inherent to Arid Regions. Plants 2021, 10, 76 .

AMA Style

Amr Fouda, Ahmed M. Eid, Albaraa Elsaied, Ehab F. El-Belely, Mohammed G. Barghoth, Ehab Azab, Adil A. Gobouri, Saad El-Din Hassan. Plant Growth-Promoting Endophytic Bacterial Community Inhabiting the Leaves of Pulicaria incisa (Lam.) DC Inherent to Arid Regions. Plants. 2021; 10 (1):76.

Chicago/Turabian Style

Amr Fouda; Ahmed M. Eid; Albaraa Elsaied; Ehab F. El-Belely; Mohammed G. Barghoth; Ehab Azab; Adil A. Gobouri; Saad El-Din Hassan. 2021. "Plant Growth-Promoting Endophytic Bacterial Community Inhabiting the Leaves of Pulicaria incisa (Lam.) DC Inherent to Arid Regions." Plants 10, no. 1: 76.

Journal article
Published: 21 October 2020 in Nanomaterials
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An endophytic strain of Streptomyces antimycoticus L-1 was isolated from healthy medicinal plant leaves of Mentha longifolia L. and used for the green synthesis of silver nanoparticles (Ag-NPs), through the use of secreted enzymes and proteins. UV–vis spectroscopy, Fourier-transform infrared (FT-IR), transmission electron microscopy (TEM), X-ray diffraction (XRD), and dynamic light scattering (DLS) analyses of the Ag-NPs were carried out. The XRD, TEM, and FT-IR analysis results demonstrated the successful biosynthesis of crystalline, spherical Ag-NPs with a particle size of 13–40 nm. Further, the stability of the Ag-NPs was assessed by detecting the surface Plasmon resonance (SPR) at 415 nm for one month or by measuring the NPs surface charge (−19.2 mV) by zeta potential analysis (ζ). The green-synthesized Ag-NPs exhibited broad-spectrum antibacterial activity at different concentrations (6.25–100 ppm) against the pathogens Staphylococcus aureus, Bacillus subtilis Pseudomonas aeruginosa, Escherichia coli, and Salmonella typhimurium with a clear inhibition zone ranging from (9.5 ± 0.4) nm to (21.7 ± 1.0) mm. Furthermore, the green-synthesized Ag-NPs displayed high efficacy against the Caco-2 cancerous cell line (the half maximal inhibitory concentration (IC50) = 5.7 ± 0.2 ppm). With respect to antibacterial and in-vitro cytotoxicity analyses, the Ag-NPs concentration of 100 ppm was selected as a safe dose for loading onto cotton fabrics. The scanning electron microscopy connected with energy-dispersive X-ray spectroscopy (SEM-EDX) for the nano-finished fabrics showed the distribution of Ag-NPs as 2% of the total fabric elements. Moreover, the nano-finished fabrics exhibited more activity against pathogenic Gram-positive and Gram-negative bacteria, even after 10 washing cycles, indicating the stability of the treated fabrics.

ACS Style

Salem S. Salem; Ehab F. El-Belely; Gniewko Niedbała; Maryam M. Alnoman; Saad El-Din Hassan; Ahmed Mohamed Eid; Tharwat I. Shaheen; Amr Elkelish; Amr Fouda. Bactericidal and In-Vitro Cytotoxic Efficacy of Silver Nanoparticles (Ag-NPs) Fabricated by Endophytic Actinomycetes and Their Use as Coating for the Textile Fabrics. Nanomaterials 2020, 10, 2082 .

AMA Style

Salem S. Salem, Ehab F. El-Belely, Gniewko Niedbała, Maryam M. Alnoman, Saad El-Din Hassan, Ahmed Mohamed Eid, Tharwat I. Shaheen, Amr Elkelish, Amr Fouda. Bactericidal and In-Vitro Cytotoxic Efficacy of Silver Nanoparticles (Ag-NPs) Fabricated by Endophytic Actinomycetes and Their Use as Coating for the Textile Fabrics. Nanomaterials. 2020; 10 (10):2082.

Chicago/Turabian Style

Salem S. Salem; Ehab F. El-Belely; Gniewko Niedbała; Maryam M. Alnoman; Saad El-Din Hassan; Ahmed Mohamed Eid; Tharwat I. Shaheen; Amr Elkelish; Amr Fouda. 2020. "Bactericidal and In-Vitro Cytotoxic Efficacy of Silver Nanoparticles (Ag-NPs) Fabricated by Endophytic Actinomycetes and Their Use as Coating for the Textile Fabrics." Nanomaterials 10, no. 10: 2082.

Article
Published: 05 June 2020 in International Journal of Environmental Analytical Chemistry
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The bio-sorption is the using of biological biomasses, live or dead form, for heavy metals removal from polluted wastewater. In the current work, live planktonic Nostoc sp. cells were used for hexavalent Chromium [Cr(VI)] elimination from Cr-contaminated wastewater. Optimisation process was achieved in order to obtain the optimum conditions that help achieving the highest Cr(VI) removal efficiency. For instance, One Factor At a Time ‘OFAT’ experiments were performed for the determination of the coded factors levels (low/high levels) that can be included in the Full factorial design experiment ‘many interacted factors at a time’. Afterwards, a small reactor design was implemented to develop Nostoc sp. algal biofilm. After that, the algal biofilm was applied in the Cr(VI) removal process to facilitate harvesting and dewatering of the biomass after the treatment process. Results showed that, live planktonic Nostoc sp. achieved the highest Cr(VI) removal efficiency of 98.16%at 100 ppm after 7 days contact time. Furthermore, Nostoc sp. stated its great ability to form a biofilm on polystyrene substrate which achieved the highest Cr(VI) removal of ‘86.498%’ at a concentration of 100 ppm after 7 days contact time. Some characterisation techniques such as Fourier Transform Infrared spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM) analyses were applied on the developed biofilm of Nostoc sp. Isotherm and kinetics were investigated for the Cr(VI) removal process using Nostoc sp. biofilm.

ACS Style

Shimaa Husien; Ahmed Labena; Ehab El-Belely; Hamada Mahmoud; Asmaa Hamouda. Application of Nostoc sp. for hexavalent chromium [Cr(VI)] removal: planktonic and biofilm. International Journal of Environmental Analytical Chemistry 2020, 1 -22.

AMA Style

Shimaa Husien, Ahmed Labena, Ehab El-Belely, Hamada Mahmoud, Asmaa Hamouda. Application of Nostoc sp. for hexavalent chromium [Cr(VI)] removal: planktonic and biofilm. International Journal of Environmental Analytical Chemistry. 2020; ():1-22.

Chicago/Turabian Style

Shimaa Husien; Ahmed Labena; Ehab El-Belely; Hamada Mahmoud; Asmaa Hamouda. 2020. "Application of Nostoc sp. for hexavalent chromium [Cr(VI)] removal: planktonic and biofilm." International Journal of Environmental Analytical Chemistry , no. : 1-22.

Journal article
Published: 01 April 2020 in Fottea
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During a recent floristic-taxonomic study on the algal flora, including diatoms, from the estuary of the Damietta Branch of the Nile in Egypt, an interesting epilithic diatom species belonging to the genus Seminavis (Naviculaceae) was collecte...

ACS Style

Abdullah A. Saber; Ehab F. El-Belely; Ahmed A. El-Refaey; Ahmed D. El-Gamal; Saul Blanco; Marco Cantonati. Seminavis aegyptiaca sp. nov., a new amphoroid diatom species from estuary epilithon of the River-Nile Damietta Branch, Egypt. Fottea 2020, 20, 49 -57.

AMA Style

Abdullah A. Saber, Ehab F. El-Belely, Ahmed A. El-Refaey, Ahmed D. El-Gamal, Saul Blanco, Marco Cantonati. Seminavis aegyptiaca sp. nov., a new amphoroid diatom species from estuary epilithon of the River-Nile Damietta Branch, Egypt. Fottea. 2020; 20 (1):49-57.

Chicago/Turabian Style

Abdullah A. Saber; Ehab F. El-Belely; Ahmed A. El-Refaey; Ahmed D. El-Gamal; Saul Blanco; Marco Cantonati. 2020. "Seminavis aegyptiaca sp. nov., a new amphoroid diatom species from estuary epilithon of the River-Nile Damietta Branch, Egypt." Fottea 20, no. 1: 49-57.

Journal article
Published: 30 September 2019 in Journal of Environmental Chemical Engineering
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Hexavalent chromium [Cr (VI)] is known as the most toxic form of chromium compounds. It had many hazardous effects on the human health and the environment. Therefore, the objective of this study aimed to remove toxic Cr (VI) from an aqueous solution using pre-treated biomass of marine brown algae Sargassum dentifolium (grinded to micro-size scale). Optimization for Cr (VI) removal efficiency (CRE) was performed through One Factor at A time experiments (OFAT) to determine the low and the high level of each factor. Afterwards, a full factorial experimental design (Many interacted factors at a time) was applied in order to determine the optimum conditions that maximize the CRE. The results of the response optimizer model suggested that the highest removal efficiency of 99.68% can be achieved by applying 1.5 g/ 100 /ml of 0.3868 μm dried algae biomass to 100 ppm Cr-contaminated wastewater with a novel model [contact time flocculation state (CFTs)] for 1 h shaking continued to12 h static, at pH 7.0, and 50 °C. Linear Langmuir and Freundlich isotherm were displayed, and results stated that Langmuir isotherm more applicable to this process which suggested a monolayer adsorption nature of the biosorbent surface.

ACS Style

Sh. Husien; Ahmed Labena; E.F. El-Belely; Hamada M. Mahmoud; Asmaa S. Hamouda. Adsorption studies of hexavalent chromium [Cr (VI)] on micro-scale biomass of Sargassum dentifolium, Seaweed. Journal of Environmental Chemical Engineering 2019, 7, 103444 .

AMA Style

Sh. Husien, Ahmed Labena, E.F. El-Belely, Hamada M. Mahmoud, Asmaa S. Hamouda. Adsorption studies of hexavalent chromium [Cr (VI)] on micro-scale biomass of Sargassum dentifolium, Seaweed. Journal of Environmental Chemical Engineering. 2019; 7 (6):103444.

Chicago/Turabian Style

Sh. Husien; Ahmed Labena; E.F. El-Belely; Hamada M. Mahmoud; Asmaa S. Hamouda. 2019. "Adsorption studies of hexavalent chromium [Cr (VI)] on micro-scale biomass of Sargassum dentifolium, Seaweed." Journal of Environmental Chemical Engineering 7, no. 6: 103444.

Journal article
Published: 13 May 2019 in Water Practice and Technology
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Hexavalent chromium Cr (VI) is a toxic heavy metal that discharged by many industries into the water streams. It is the most toxic form of chromium compound, which causes significant damage to receiving ecosystems. A microalgal species, Chlorella sp., was used as a biosorbent material to remove Cr (VI) from Cr-contaminated effluents. Furthermore, different variables: pH, temperature, contact time, Cr (VI) concentration and algal dose, were optimized in order to determine the optimum conditions that achieve the highest removal efficiency. The optimization process was achieved through two steps: one factor at a time (OFAT) experiments followed by 25 general full factorial. Moreover, molecular identification was performed using 18S rRNA in order to demonstrate the species of Chlorella, and it was identified as Chlorella sorokiniana. The highest chromium removal efficiency of 99.6793% was achieved at 100 ppm Cr (VI) after three days' contact time. Chlorophyll ‘a’ estimation as a growth indicator stated that Chlorella sorokiniana can tolerate 100 ppm Cr (VI) for three days' exposure. The results suggested that Chlorella sorokiniana is a good biosorbent material and it distinguished by its high ability to uptake Cr (VI) from solutions.

ACS Style

Sh. Husien; Ahmed Labena; Ehab El-Belely; Hamada M. Mahmoud; Asmaa S. Hamouda. Absorption of hexavalent chromium by green micro algae Chlorella sorokiniana: live planktonic cells. Water Practice and Technology 2019, 14, 515 -529.

AMA Style

Sh. Husien, Ahmed Labena, Ehab El-Belely, Hamada M. Mahmoud, Asmaa S. Hamouda. Absorption of hexavalent chromium by green micro algae Chlorella sorokiniana: live planktonic cells. Water Practice and Technology. 2019; 14 (3):515-529.

Chicago/Turabian Style

Sh. Husien; Ahmed Labena; Ehab El-Belely; Hamada M. Mahmoud; Asmaa S. Hamouda. 2019. "Absorption of hexavalent chromium by green micro algae Chlorella sorokiniana: live planktonic cells." Water Practice and Technology 14, no. 3: 515-529.

Journal article
Published: 09 March 2015 in Journal of Ecology
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1.Environmental stress can influence species traits and performance considerably. Using a seaweed–snail system from NW (Nova Scotia) and NE (Helgoland) Atlantic rocky shores, we examined how physical stress (wave exposure) modulates traits in the seaweed Fucus vesiculosus and indirectly in its main consumer, the periwinkle Littorina obtusata. 2.In both regions, algal tissue toughness increased with wave exposure. Reciprocal‐transplant experiments showed that tissue toughness adjusted plastically to the prevailing level of wave exposure. 3.Choice experiments tested the feeding preference of snails from sheltered, exposed, and very exposed habitats for algae from such wave exposures. Snails from exposed and very exposed habitats consumed algal tissues at similar rates irrespective of the exposure of origin of the algae. However, snails from sheltered habitats consumed less algal tissues from very exposed habitats than tissues from sheltered and exposed habitats. Choice assays using reconstituted algal food (triturated during preparation) identified high thallus toughness as the explanation for the low preference of snails from sheltered habitats for algae from very exposed habitats. 4.Ultrastructural analyses of radulae indicated that rachidian teeth were longest and the number of cusps in lateral teeth (grazing‐relevant traits) was highest in snails from very exposed habitats, suggesting that radulae are best suited to rupture tough algal tissues in such snails. 5.No‐choice feeding experiments revealed that these radular traits were also phenotypically plastic, as they adjusted to the toughness of the algal food. 6.Synthesis. This study indicates that the observed plasticity in the feeding ability of snails is mediated by wave exposure through phenotypic plasticity in the tissue toughness of algae. Thus, plasticity in consumers and their resource species may reduce the potential effects of physical stress on their interaction. This article is protected by copyright. All rights reserved.

ACS Style

Markus Molis; Ricardo Augusto Scrosati; Ehab El-Belely; Thomas J. Lesniowski; Martin Wahl. Wave‐induced changes in seaweed toughness entail plastic modifications in snail traits maintaining consumption efficacy. Journal of Ecology 2015, 103, 851 -859.

AMA Style

Markus Molis, Ricardo Augusto Scrosati, Ehab El-Belely, Thomas J. Lesniowski, Martin Wahl. Wave‐induced changes in seaweed toughness entail plastic modifications in snail traits maintaining consumption efficacy. Journal of Ecology. 2015; 103 (4):851-859.

Chicago/Turabian Style

Markus Molis; Ricardo Augusto Scrosati; Ehab El-Belely; Thomas J. Lesniowski; Martin Wahl. 2015. "Wave‐induced changes in seaweed toughness entail plastic modifications in snail traits maintaining consumption efficacy." Journal of Ecology 103, no. 4: 851-859.