scholarly journals Polymer Capped Silver Nanoparticles from Ziziphus nummularia Leaves Extract: Potent Antibacterial and Antioxidant Activity

2021 ◽  
Vol 18 (4) ◽  
pp. 691-701
Author(s):  
Faruk Arodiya ◽  
Chirag Makvana ◽  
Kokila Parmar
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Antioxidant Activity ◽  
Silver Nanoparticles ◽  
Fourier Transform ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Ziziphus Nummularia ◽  
Antimicrobial And Antioxidant Activity

Generally, synthesis and encapsulation process improve therapeutic value of nano encapsulated drugs. The silver nanoparticles (AgNPs) biosynthesized from Ziziphus nummularia leaves and encapsulated with polyvinyl pyrrolidone (PVP) polymer as antibacterial agents, due to its high bioavailability, better encapsulation and less toxic properties. The nanoparticles (AgNPs) biosynthesized from Ziziphus nummularia leaves and capped with polyvinyl pyrrolidone (PVP) polymer, The acquired AgNPs and polymeric functionalized AgNPs were fully characterised by the UV- Visible spectroscopy , Transmission electron microscopy (TEM), X-Ray diffraction pattern (XRD) and Fourier transform infrared spectroscopy (FTIR).The crystalline Ag NPs and Polymer Functionalized AgNPs have a face-centered cubic structure with an average size of 9.20 nm, according to X-ray Diffraction spectroscopy. Fourier Transform Infrared spectroscopy revealed that biomolecules such as proteins are incapable of reducing metal ions and the formation of an encapsulating layer in terms of metal ions. High-Resolution transmission electron microscopy revealed that Polymer functionalized AgNPs ranged in size of 10 nm. AgNPs and Polymer functionalized AgNPs showed effective antimicrobial and antioxidant activity. The biosynthesized monodisperse silver nanoparticles and encapsulated silver nanoparticles demonstrated better antimicrobial and antioxidant activity which can be used in various biomedical applications.

scholarly journals Cottonseed Oilcake Extract Mediated Green Synthesis of Silver Nanoparticles and Its Antibacterial and Cytotoxic Activity

2016 ◽  
Vol 2016 ◽  
pp. 1-6 ◽  
Author(s):  
Muthusamy Govarthanan ◽  
Min Cho ◽  
Jung-Hee Park ◽  
Jum-Suk Jang ◽  
Young-Joo Yi ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Silver Nanoparticles ◽  
Fourier Transform ◽  
Green Synthesis ◽  
Pseudomonas Syringae ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Xrd Techniques

Agroindustrial byproduct mediated green synthesis of silver nanoparticles was carried out using cottonseed oilcake (CSOC) extract. The aqueous silver nitrate formed stable silver nanoparticles with CSOC extract as a reducing agent for Ag+to Ag0. The synthesized nanoparticles were characterized using energy dispersive X-ray spectroscopy (EDS), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD) techniques. The synthesized silver nanoparticles (AgNPs) (4 mM) significantly inhibited the growth of phytopathogens,Pseudomonas syringaepv.actinidiaeandRalstonia solanacearum. Further, cytotoxicity of AgNPs was evaluated using rat splenocyte cells. The splenocyte viability was decreased according to the increasing concentration of AgNPs and 90% of cell death was observed at 100 μg/mL.

On the destruction of kaolinite and gibbsite by phenylphosphonic, phenylphosphinic and phenylarsonic acids: evidence for the formation of new Al compounds

Clay Minerals ◽  
2004 ◽  
Vol 39 (4) ◽  
pp. 391-404 ◽  
Author(s):  
J. E. F. C. Gardolinski ◽  
G. Lagaly ◽  
M. Czank
Keyword(s):  
Electron Microscopy ◽  
Thermal Analysis ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Linear Chain ◽  
X Ray Diffraction ◽  
Phenylphosphonic Acid ◽  
X Ray ◽  
Selected Area Electron Diffraction ◽  
Transmission Electron

AbstractKaolinite and synthetic γ-Al(OH)3 (gibbsite or hydrargillite) were reacted with phenylphosphonic, phenylphosphinic and 2-nitrophenol-4-arsonic acids. The products were studied by powder X-ray diffraction, transmission electron microscopy/selected area electron diffraction/ energy dispersive X-ray/Fourier transform infrared and simultaneous thermogravimetric/differential thermal analysis. The acids were not intercalated but, instead, easily destroyed the structure of the minerals. Lamellar Al phenylphosphonate and aluminium phenylphosphinate and phenylarsonate with polymeric linear-chain structures were formed from kaolinite. The reaction between gibbsite and the same acids yielded almost identical products. No evidence of formation of grafted kaolinite derivatives after the reaction with phenylphosphonic acid was found.

scholarly journals Sintesis Nanopartikel Nickel Ferrite (NiFe2O4) dengan Metode Kopresipitasi dan Karakterisasi Sifat Kemagnetannya (Halaman 20 s.d. 25)

2015 ◽  
Vol 19 (56) ◽  
Author(s):  
Muflihatun ◽  
Siti Shofiah ◽  
Edi Suharyadi
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Nickel Ferrite ◽  
Fourier Transform Infrared ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron

Nanopartikel Nikel Ferit (NiFe2O4) telah disintesis dengan metode kopresipitasi dengan memvariasi konsentrasi NaOH dan suhu sintesis. Struktur kristal, ukuran partikel, dan morfologi dari sampel dianalisa menggunakan X-ray diffraction (XRD) dan transmission electron microscopy (TEM). Ukuran butir pada konsentrasi NaOH 3, 5, dan 10 M masing-masing adalah 5,7; 4,3; dan 4,2 nm, sedangkan pada suhu 60, 80, dan 150°C berturut-turut adalah 4,2; 4,9; dan 5,5 nm. Analisa fourier transform infrared (FTIR) menunjukkan dua puncak serapan pada rentang ~400-600 cm-1 yang terkait dengan site oktahedral dan tetrahedral pada struktur NiFe2O4. Sifat magnetik NiFe2O4 hasil analisa vibrating sample magnetometer (VSM) menunjukkan bahwa sampel berperilaku ferromagnetik dengan nilai koersivitasnya pada rentang 42-47 Oe. Sampel dengan variasi konsentrasi NaOH, koersivitasnya cenderung menurun dengan menurunnya ukuran partikel. Sementara sampel dengan variasi suhu, semakin kecil ukuran partikel, koersivitasnya cenderung meningkat. Pada 15 kOe, nilai magnetisasi terbesar (6,17 emu/g) diperoleh pada sampel dengan rasio fasa α-Fe2O3 paling rendah.

SIZED-CONTROLLED ZnO NANOPARTICLES, SYNTHESIS AND MORPHOLOGY

2009 ◽  
Vol 08 (03) ◽  
pp. 277-279 ◽  
Author(s):  
MOHSEN OFTADEH ◽  
MASOUD SALAVATI-NIASARI ◽  
FATEMEH DAVAR
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Zinc Oxide Nanoparticles ◽  
Oxide Nanoparticles ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Zinc Acetylacetonate ◽  
Nanoparticles Synthesis

Zinc oxide nanoparticles were successfully prepared through the decomposition of zinc acetylacetonate precursor in oleylamine in the presence of triphenylphosphine. The products were characterized by X-ray diffraction, transmission electron microscopy, and Fourier transform infrared spectroscopy.

N-Doped CDs–GP nanospheres as a drug delivery nanocarrier system with carbon dots and a fluorescent tracer

2017 ◽  
Vol 41 (19) ◽  
pp. 10880-10889 ◽  
Author(s):  
Ping Yuan ◽  
Ming Zhang ◽  
Ninglin Zhou ◽  
Cheng Chi ◽  
Xiaohong Chu ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Drug Delivery ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Fluorescence Spectroscopy ◽  
Carbon Dots ◽  
X Ray Diffraction ◽  
Fluorescent Tracer ◽  
X Ray ◽  
Transmission Electron

In this study, a carbon dots-genipin covalent conjugate (CDs–GP) was synthesized, characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), transmission electron microscopy (TEM), and fluorescence spectroscopy (FL).

Synthesis and photocatalytic hydrogen evolution of meso-tetrakis(p-sulfonatophenyl)porphyrin functionalized platinum nanocomposites

2010 ◽  
Vol 14 (06) ◽  
pp. 540-546 ◽  
Author(s):  
Lingling Zhang ◽  
Yongtao Lu ◽  
Yukou Du ◽  
Ping Yang ◽  
Xiaomei Wang
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Antenna System ◽  
X Ray Diffraction ◽  
Visible Absorption ◽  
X Ray ◽  
Transmission Electron ◽  
Visible Absorption Spectroscopy

Meso-tetrakis(p-sulfonatophenyl)porphyrin (TPPS4) functionalized platinum nanocomposites were synthesized and characterized using ultraviolet-visible absorption spectroscopy (UV-vis), fluorescence spectroscopy (FL), Fourier transform infrared spectroscopy (FTIR), transmission electron microscopy (TEM), and X-ray diffraction (XRD) methods. The postulated configuration of TPPS4 functionalized platinum nanocomposite may be described as an antenna system containing a photoreceptive TPPS4 shell and a nanosize platinum core. Fluorescence and photoelectrochemistry studies of both TPPS4 and the platinum nanocomposites showed that efficient electron/energy transfer occurred from the TPPS4 donor to the metallic nanocore acceptor. TPPS4 functionalized platinum nanocomposites are photocatalytic active for water reduction to produce hydrogen. The turnover numbers (TONPt and TONTPPS4) and quantum yield of hydrogen (ϕH2) for the photocatalyst (nPt:nTPPS4= 250) were 44, 11056, and 1.8%, respectively, calculated on the basis of the total amount of H2 evolution for 12 h irradiation.

scholarly journals Antimicrobial Activity of Silver Nanoparticles Synthesized Using Goat Milk against Pathogens of Selected Vegetables

2019 ◽  
pp. 1-10 ◽  
Author(s):  
T. A. Ihum ◽  
C. C. Iheukwumere ◽  
I. O. Ogbonna ◽  
G. M. Gberikon
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Antimicrobial Activity ◽  
Silver Nanoparticles ◽  
Goat Milk ◽  
Cubic Phase ◽  
Face Centered Cubic ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron

This study was carried out to determine the antimicrobial activity of silver nanoparticles synthesized using goat milk against pathogens of selected vegetables. Synthesis of Silver nanoparticles was done using Goat milk, and characterized using Ultra Violet-Visible absorption spectroscopy, Fourier-transform infrared spectroscopy (FTIR), X- ray diffraction (XRD) and Transmission Electron Microscopy (TEM). Maximum absorbance of Goat milk synthesized AgNPs was observed at 417 nm, with FTIR peaks at 3455 cm−1, 1628 cm−1, 1402 cm−1, 1081 cm−1 and 517 cm−1, indicating that proteins in Goat milk (GM) were the capping and stabilization molecules involved the synthesis of AgNPs. Transmission electron microscopy analysis showed that the biosynthesized particles were spherical in shape having a size of 10-100 nm, X- ray diffraction (XRD) pattern agreed with the crystalline nature and face-centered cubic phase of AgNPs. Evaluation of the antimicrobial activity of AgNPs synthesized using GM against the indicator strains (Staphylococcus aureus CIP 9973, Pectobacterium carotovorum Pec1, Enterobacter cloacae AS10, Klebsiella aerogenes OFM28, Proteus mirabilis UPMSD3 and Escherichia coli 2013C-3342) isolated from selected vegetables, was carried out using the Agar diffusion assay at different concentrations of 25, 75 and 100 µl/ml. The present study demonstrated that the AgNPs synthesized using Goat milk have potent biological activities, which can find applications in diverse areas.

scholarly journals Pengaruh Konsentrasi Polyethylene glycol (PEG) pada Sifat Kemagnetan Nanopartikel Magnetik PEG-Coated Fe3O4 (Halaman 35 s.d. 40)

2014 ◽  
Vol 17 (51) ◽  
Author(s):  
Seveny Nuzully ◽  
Takeshi Kato ◽  
Edi Suharyadi
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Polyethylene Glycol ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Peg 4000 ◽  
Infra Red

Nanopartikel magnetit (Fe3O4) telah berhasil disintesis menggunakan metode kopresipitasi dengan penambahan Polyethylene Glycol (PEG-4000) sebagai coating. Distribusi ukuran partikel dan sifat magnetik dari nanopartikel ini diteliti berdasarkan perbandingan massa Fe3O4 dan PEG, yaitu 1:1, 2:1, 3:1, 4:1, 1:2, dan 1:3. Distribusi ukuran partikel dikarakteristik dengan Transmission Electron Microscopy (TEM) sedangkan pengujian awal untuk mengetahui struktur kristal yang terkandung dalam sampel hasil sintesis dikarakteristik dengan X-Ray Diffraction (XRD), kemudian untuk mengetahui keberhasilan coating PEG dapat dikarakterisasi dengan menggunakan Fourier Transform Infra Red (FTIR) serta sifat magnetiknya dapat dikarakterisasi menggunakan Vibrating Sample Magnetometer (VSM). Sampel 1:1, 2:1, 3:1, 4:1, 1:2, 1:3 berturut-turut meiliki nilai Ms 37,2; 49,7; 55,2; 61,7; 27,7; 33,7 dan nilai Mr 4,8; 6,4; 6,6; 8,0; 3,3; 4,7. Hasil karakterisasi menunjukkan bahwa penambahan konsentrasi PEG mengakibatkan nilai saturation magnetic (Ms) dan remanence magnetic (Mr) turun, kecuali pada sampel dengan perbandingan 1:3.

scholarly journals Pengaruh Konsentrasi Polyethylene glycol (PEG) pada Sifat Kemagnetan Nanopartikel Magnetik PEG-Coated Fe3O4 (Halaman 35 s.d. 40)

2014 ◽  
Vol 17 (51) ◽  
Author(s):  
Seveny Nuzully ◽  
Takeshi Kato ◽  
Edi Suharyadi
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Fourier Transform ◽  
Polyethylene Glycol ◽  
Vibrating Sample Magnetometer ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Peg 4000 ◽  
Infra Red

Nanopartikel magnetit (Fe3O4) telah berhasil disintesis menggunakan metode kopresipitasi dengan penambahan Polyethylene Glycol (PEG-4000) sebagai coating. Distribusi ukuran partikel dan sifat magnetik dari nanopartikel ini diteliti berdasarkan perbandingan massa Fe3O4 dan PEG, yaitu 1:1, 2:1, 3:1, 4:1, 1:2, dan 1:3. Distribusi ukuran partikel dikarakteristik dengan Transmission Electron Microscopy (TEM) sedangkan pengujian awal untuk mengetahui struktur kristal yang terkandung dalam sampel hasil sintesis dikarakteristik dengan X-Ray Diffraction (XRD), kemudian untuk mengetahui keberhasilan coating PEG dapat dikarakterisasi dengan menggunakan Fourier Transform Infra Red (FTIR) serta sifat magnetiknya dapat dikarakterisasi menggunakan Vibrating Sample Magnetometer (VSM). Sampel 1:1, 2:1, 3:1, 4:1, 1:2, 1:3 berturut-turut meiliki nilai Ms 37,2; 49,7; 55,2; 61,7; 27,7; 33,7 dan nilai Mr 4,8; 6,4; 6,6; 8,0; 3,3; 4,7. Hasil karakterisasi menunjukkan bahwa penambahan konsentrasi PEG mengakibatkan nilai saturation magnetic (Ms) dan remanence magnetic (Mr) turun, kecuali pada sampel dengan perbandingan 1:3.

Sign in / Sign up

Export Citation Format

Share Document