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Wyszukujesz frazę "ZnO nanoparticles" wg kryterium: Temat

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    Wyświetlanie 1-2 z 2
    Tytuł:
    Production of Zinc oxide nanoparticles using extracts of Passiflora edulis Sims. f. flavicarpa Deg.
    Autorzy:
    Manokari, M.
    Shekhawat, Mahipal S.
    Powiązania:
    https://bibliotekanauki.pl/articles/1192673.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Passiflora edulis Sims. f. flavicarpa Deg.
    UV-Visible double beam spectrophotometry
    aqueous extracts
    ZnO nanoparticles
    Opis:
    The synthesis of zinc oxide nanoparticles (ZnO) using herbal extract is always environmentally benign. The present investigation focuses on the synthesis of ZnO nanoparticles using aqueous extracts of various parts of Passiflora edulis Sims. f. flavicarpa Deg. (Passion fruit). The plant is rich in alkaloids, glycosides, flavonoids and triterpenes. UV-Visible double beam spectrophotometric analysis was used for characterization of ZnO nanoparticles with different time intervals which were synthesized by plant extracts. The bio-reduction completes in two hr incubation of reaction mixtures with strong broad peaks at 332 nm from leaves, 296 nm from stem and 326 nm from flower extracts. Hence the biosynthesis of ZnO nanoparticles using aqueous extracts of P. edulis could be an alternative to chemical methods and exploited in various biofields.
    Źródło:
    World Scientific News; 2016, 47, 2; 267-278
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Antibacterial activity of modified zinc oxide nanoparticles against Pseudomonas aeruginosa isolates of burn infections
    Autorzy:
    Aysa, Noor Hadi
    Salman, Halah Dawood
    Powiązania:
    https://bibliotekanauki.pl/articles/1191368.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Antimicrobial activity
    Pseudomonas aeruginosa
    ZnO
    burn infection
    nanoparticles
    surface modification
    Opis:
    In this research antimicrobial activity of nanoparticles ZnO on perilous bacteria such as Pseudomonas aeruginosa was evaluated. P. aeruginosa is important pathogen that caused burn wound infections as it is multi-drug resistant and has several virulence factors. Fifteen samples of P. aeruginosa were collected from patients who suffering from Burn infections in Al-Hilla teaching hospital burn unit with the age range between (7-80) years old for both genders. After collecting burn samples, the diagnosis and characterization were performed by culturing and biochemical tests. ZnO NPs were synthesized by chemical method, Zinc oxide nanoparticles are well-known to be one of the multifunctional inorganic compounds which are widely used in medical applications. This study aims to prepare ZnO nanoparticles with particle size ranging from 23-29  nm. In the present study, surface modification of ZnO nanoparticles was performed, and influence of modification of the structure and morphological properties was investigated. The resulting nanoparticles were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM) and atomic force (AFM). Zinc oxide nanoparticles with the average diameter of about 29 nm were modified with an oleic acid to exert more compatibility. From the results obtained it is suggested that modified ZnO-nanoparticles could be used effectively in safety environmental and medical applications. Antibacterial activity for nanoparticle ZnO against P. aeruginosa isolates was measured by: Agar Diffusion Technique and Minimum Inhibitory Concentration (MIC)/Minimum bactericidal Concentration (MBC) with microdilution. The best zone of inhibition was (35.5mm) at a concentration of 40 μg/ml of nano-ZnO in one strain of P. aeruginosa while the lowest inhibition zone was (16 mm) at a concentration of 20 μg/ml of nano ZnO in one strain also. In addition, all P. aeruginosa isolates were completely inhibited at the concentration of 3.7 μg/ml of nano-ZnO (MIC) but no significant antibacterial activity was observed at concentrations less than 1.8 μg/ml of nano-ZnO and the (MBC) was same as MIC (3.7 μg/ml) for all P.aeruginosa isolates.
    Źródło:
    World Scientific News; 2016, 33; 1-14
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-2 z 2

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