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Добірка наукової літератури з теми "PHYCOSYNTHESIS"

Автор: Grafiati

Опубліковано: 11 вересня 2023

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Статті в журналах з теми "PHYCOSYNTHESIS"

Mashjoor, Sakineh, and Morteza Yousefzadi. "Phycosynthesis of Antimicrobial Ulva prolifera-Fe3O4 Magnetic Nanoparticles." Iranian Journal of Medical Microbiology 12, no. 3 (August 1, 2018): 208–17. http://dx.doi.org/10.30699/ijmm.12.3.208.

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ElSaied, Basant E. F., Amany M. Diab, Ahmed A. Tayel, Mousa A. Alghuthaymi, and Shaaban H. Moussa. "Potent antibacterial action of phycosynthesized selenium nanoparticles using Spirulina platensis extract." Green Processing and Synthesis 10, no. 1 (January 1, 2021): 49–60. http://dx.doi.org/10.1515/gps-2021-0005.

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Abstract Selenium nanoparticles (SeNPs) are reinforced safe forms of the essential micronutrient selenium (Se) which take a lead in countless biotechnological and biomedical applications. The phycosynthesis of SeNPs was successfully investigated using cell-free extract of the microalgae, Spirulina platensis. The phycosynthesized S. platensis-SeNPs (SpSeNPs) were characterized using several characterization techniques such as UV-Visible, transmission electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, and energy dispersive X-ray. They were effectually achieved using different concentration from sodium selenite (Na2SeO3) (1, 5, and 10 mM) to give size means of 12.64, 8.61, and 5.93 nm, respectively, with spherical shapes and highly negative zeta potentialities. The infrared analyses revealed the involvement of many phycochemials in SpSeNPs production. The antibacterial properties of SpSeNPs were confirmed, qualitatively and quantitatively, against foodborne microorganisms (Staphylococcus aureus and Salmonella typhimurium); the antibacterial activity was correlated and increased with SeNPs’ size diminution. The scanning micrographs of S. typhimurium cells treated with SpSeNPs indicated the severe action of nanoparticles to destroy bacterial cells in time-dependent manners. The innovative facile phycosynthesis of SeNPs using S. platensis is recommended to generate effectual bioactive agents to control hazardous bacterial species.

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Raju, Baskar, Abirami Muniyasamy, Shalini Gupta Prakash, Aruna Sharmili Sundararaj, and Umamaheswari Kesavachandran. "Phycosynthesis of Nanostructured Silver using Enteromorpha intestinalis and Evaluation of its Inhibitory Effect on Human Bacterial and Fungal Pathogens." Journal of Cluster Science 28, no. 3 (February 24, 2017): 1739–48. http://dx.doi.org/10.1007/s10876-017-1166-4.

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Alsaggaf, Mohammed S., Amany M. Diab, Basant E. F. ElSaied, Ahmed A. Tayel, and Shaaban H. Moussa. "Application of ZnO Nanoparticles Phycosynthesized with Ulva fasciata Extract for Preserving Peeled Shrimp Quality." Nanomaterials 11, no. 2 (February 3, 2021): 385. http://dx.doi.org/10.3390/nano11020385.

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Zinc oxide nanoparticles (ZnONPs) were the targets of numerous biological syntheses to attain their precious values in various biomedical fields. The phycosynthesis of ZnONPs were innovatively investigated using cell-free extract of the macroalgae, Ulva fasciata Delile. The phycosynthesized U. fasciata-zinc oxide nanoparticles (UFD-ZnONPs) had 77.81 nm mean size, with flower and sphere shapes and positive zeta potential. The UFD-ZnONPs infra-red analysis indicated their basic components’ cross-linkage. The antibacterial potentialities of UFD-ZnONPs were confirmed, qualitatively and quantitatively, against foodborne microorganisms (Escherichia coli plus Staphylococcus aureus); the bactericidal action was higher for UFD-ZnONPs than the annealed phycosynthesized ZnONPs. The scanning micrographs of S. aureus and E. coli cells treated with UFD-ZnONPs indicated the severe action of nanoparticles to destroy bacterial cells in time-dependent manners. Peeled shrimps (Fenneropenaeus indicus) were biopreservated through refrigerated storage (4 °C) with UFD-ZnONPs based solution for six days. The microbial examination of UFD-ZnONPs -treated shrimps displayed decrease in microbial loads throughout the storage days. Moreover, the UFD-ZnONPs-treated shrimps showed acceptable sensorial attributes (appearance, odor, color and texture) compared to untreated shrimps. UFD-ZnONPs nanocomposite concentration of 3% and 5% could be remarkably suggested as efficient procedure for shrimps’ biopreservation during refrigerated storage regarding sensorial quality and microbial profile of product.

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Ganapathy Selvam, G., and K. Sivakumar. "Phycosynthesis of silver nanoparticles and photocatalytic degradation of methyl orange dye using silver (Ag) nanoparticles synthesized from Hypnea musciformis (Wulfen) J.V. Lamouroux." Applied Nanoscience 5, no. 5 (September 16, 2014): 617–22. http://dx.doi.org/10.1007/s13204-014-0356-8.

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Almutairi, Fahad M., Haddad A. El Rabey, Adel I. Alalawy, Alzahraa A. M. Salama, Ahmed A. Tayel, Ghena M. Mohammed, Meshari M. Aljohani, Ali A. Keshk, Nasser H. Abbas, and Mohamed M. Zayed. "Application of Chitosan/Alginate Nanocomposite Incorporated with Phycosynthesized Iron Nanoparticles for Efficient Remediation of Chromium." Polymers 13, no. 15 (July 28, 2021): 2481. http://dx.doi.org/10.3390/polym13152481.

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Biopolymers and nanomaterials are ideal candidates for environmental remediation and heavy metal removal. As hexavalent chromium (Cr6+) is a hazardous toxic pollutant of water, this study innovatively aimed to synthesize nanopolymer composites and load them with phycosynthesized Fe nanoparticles for the full Cr6+ removal from aqueous solutions. The extraction of chitosan (Cht) from prawn shells and alginate (Alg) from brown seaweed (Sargassum linifolium) was achieved with standard characteristics. The tow biopolymers were combined and cross-linked (via microemulsion protocol) to generate nanoparticles from their composites (Cht/Alg NPs), which had a mean diameter of 311.2 nm and were negatively charged (−23.2 mV). The phycosynthesis of iron nanoparticles (Fe-NPs) was additionally attained using S. linifolium extract (SE), and the Fe-NPs had semispherical shapes with a 21.4 nm mean diameter. The conjugation of Cht/Alg NPs with SE-phycosynthesized Fe-NPs resulted in homogenous distribution and stabilization of metal NPs within the polymer nanocomposites. Both nanocomposites exhibited high efficiency as adsorbents for Cr6+ at diverse conditions (e.g., pH, adsorbent dose, contact time and initial ion concentration) using batch adsorption evaluation; the most effectual conditions for adsorption were a pH value of 5.0, adsorbent dose of 4 g/L, contact time of 210 min and initial Cr6+ concentration of 75 ppm. These factors could result in full removal of Cr6+ from batch experiments. The composited nanopolymers (Cht/Alg NPs) incorporated with SE-phycosynthesized Fe-NPs are strongly recommended for complete removal of Cr6+ from aqueous environments.

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Fayyad, Raghad, Alaa Mohammed Ali, Noor Al-Huda Saeed, Israa Hamzah, and Ahmed Dwaish. "Phycosynthesis of Silver Nanoparticles Using Cladophora Glomerata and Evaluation of Their Ability to Inhibit the Proliferation of MCF-7 and L20B Cell Lines." Asian Pacific Journal of Cancer Prevention 23, no. 10 (October 1, 2022): 3563–69. http://dx.doi.org/10.31557/apjcp.2022.23.10.3563.

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Khalafi, Tariq, Foad Buazar, and Kamal Ghanemi. "Phycosynthesis and Enhanced Photocatalytic Activity of Zinc Oxide Nanoparticles Toward Organosulfur Pollutants." Scientific Reports 9, no. 1 (May 3, 2019). http://dx.doi.org/10.1038/s41598-019-43368-3.

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Tonelli, Fernanda Maria Policarpo, Christopher Santos Silva, Vinicius Marx Silva Delgado, and Flávia Cristina Policarpo Tonelli. "Algae-based green AgNPs, AuNPs, and FeNPs as potential nanoremediators." Green Processing and Synthesis 12, no. 1 (January 1, 2023). http://dx.doi.org/10.1515/gps-2023-0008.

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Abstract This review addresses green algae-based gold (Au), iron (Fe), and silver (Ag) nanoparticles (NPs) as eco-friendly nanomaterials to deal with biological, organic, and inorganic environmental contaminants. Among nanotechnological tools that can fully degrade, adsorb, and/or convert pollutants into less harmful structures, AgNPs, AuNPs, and FeNPs deserve highlight for their efficiency and low cost. However, green protocols are preferable to produce them in an eco-friendly manner. Although phycosynthesis is still in its infancy, algae present various advantages as green raw materials to NPs’ synthesis; fast growth rate, low-energy input requirement, low costs, easy and eco-friendly cultivation, and high tolerance to metals are examples. To allow their large-scale application, however, challenges regarding obtaining sufficient biomaterial with good reproducibility, designing protocols to achieve desirable features on NPs, and recovering the biocompatible nanomaterial after use still need attention. Perspectives for the field involve surpassing these limitations, broadening knowledge on synthesis mechanisms, protocols, and new species useful to offer, in the future, commercial eco-friendly, and low-cost phycosynthesized AuNPs, AgNPs, and FeNPs to nanoremediation. The potential of these NPs to deal with environmental contaminants, their advantageous characteristics and biocompatibility, the main limitations associated with their large-scale application, and future prospects for the field will receive attention.

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Tayel, Ahmed A., Nancy A. Elsayes, Mohamed M. Zayed, Mohammed A. Alsieni, Fuad A. Alatawi, Adel I. Alalawy, and Amany M. Diab. "Powerful antibacterial nanocomposites from Corallina officinalis-mediated nanometals and chitosan nanoparticles against fish-borne pathogens." Green Processing and Synthesis 12, no. 1 (January 1, 2023). http://dx.doi.org/10.1515/gps-2023-0042.

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Abstract The fish-borne zoonotic bacteria may pose a risk to humans; nanobiotechnological techniques could serve as effective solutions for fighting them. The direct phycosynthesis of metals’ nanoparticles (NPs), silver (AgNPs), and selenium (SeNPs) using Corallina officinalis extract (CoE) was achieved. The construction of nanocomposites (NCs) from phycosynthesized NPs and nano-chitosan (NCht) was also accomplished to evaluate these entire compounds/NCs as antibacterial amalgams against fish-borne bacteria, Aeromonas hydrophila, Pseudomonas aeruginosa, Salmonella typhimurium, and Staphylococcus aureus. The entire agents/NCs were characterized and assessed. The structure and interactions of chemicals and NCs were determined using infrared analysis. CoE/AgNPs, CoE/SeNPs, NCht, NCht/CoE/AgNPs, and NCht/CoE/SeNPs had mean particles’ diameter of 5.52, 12.46, 59.81, 64.59, and 77.16 nm, respectively, which were confirmed by size studies and electron microscopy. The challenged bacteria were entirely susceptible to the inspected agents, using both qualitative and quantitative assays; S. aureus was more resistant, while A. hydrophila was the most sensitive strain. The NCs (NCht/CoE/AgNPs and NCht/CoE/SeNPs) have the utmost bactericidal potentialities, respectively; they exceeded the action of ampicillin. The total distortion, disintegration, and lysis of the treated A. hydrophila cells were highlighted by scanning imaging within 10 h of exposure. The conjugation of CoE-mediated NPs with NCht produced effective and harmless NCs, valid for applications to remove fish-borne pathogens with biosafe characteristics.

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Дисертації з теми "PHYCOSYNTHESIS"

CHAUDHARY, SHRUTIKA. "PHYCOSYNTHESIS OF ZINC OXIDE NANOPARTICLES FROM CHLORELLA SP. AND ITS CHARACTERIZATION AND APPLICATION." Thesis, 2023. http://dspace.dtu.ac.in:8080/jspui/handle/repository/19899.

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Chlorella sp. are bio-factory of several bioactive compounds which aid in the formation of many nanoparticles (NPs). The bioactive compounds present in algae are fucoxanthin, carotenoid, phycocyanin, etc. These bioactive compounds help in the diminution of metal precursor to their respective metal/metal oxide NPs. NPs synthesized from Chlorella sp. are biocompatible, ecofriendly, and non-toxic. “Phycosynthesis” is the term given to the synthesis NPs from algal species. ZnO NPs are very versatile because they possess biomedical properties like antimicrobial, anti-cancerous, and anti-diabetic activity. Moreover, they also have the ability to degrade pollutants such as heavy metals and dyes. In this report, biological synthesis ZnO NPs is performed from extract of Chlorella sp. and characterized using UV-vis spectrophotometer, Zeta sizer to identify the charge and the hydrodynamic size of the ZnO NPs. These ZnO NPs were then used to identify their antibacterial property against E.coli.

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