scholarly journals Rowan Berries: A Potential Source for Green Synthesis of Extremely Monodisperse Gold and Silver Nanoparticles and Their Antimicrobial Property

Pharmaceutics ◽  
2021 ◽  
Vol 14 (1) ◽  
pp. 82
Author(s):  
Priyanka Singh ◽  
Ivan Mijakovic
Keyword(s):  
Electron Microscopy ◽  
Mass Spectrometry ◽  
Silver Nanoparticles ◽  
Inductively Coupled Plasma ◽  
Antimicrobial Property ◽  
Gold And Silver Nanoparticles ◽  
Inductively Coupled ◽  
Flight Mass Spectrometry ◽  
Vis Spectroscopy ◽  
Plasma Mass Spectrometry

Rowanberries (Sorbus aucuparia) are omnipresent in Europe. The medicinal importance of rowanberries is widely known and corresponds to the active ingredients present in the fruits, mainly polyphenols, carotenoids, and organic acids. In the current study, we explored rowanberries for the reduction of gold and silver salts into nanoparticles. Rowanberries-mediated gold nanoparticles (RB-AuNPs) formed within 5 s at room temperature, and silver nanoparticles (RB-AgNPs) formed in 20 min at 90 °C. The produced nanoparticles were thoroughly characterized by UV-Vis spectroscopy, scanning electron microscopy (SEM), energy dispersive X-ray (EDX), transmission electron microscopy (TEM), dynamic light scattering (DLS), single-particle inductively coupled plasma–mass spectrometry (sp-ICP-MS), thermogravimetric analysis (TGA), Fourier transform-infrared spectroscopy (FT-IR) and matrix-assisted laser desorption/ionization time of flight mass spectrometry (MALDI-TOF). The characterization confirmed that the nanoparticles are highly monodisperse, spherical, stable over long periods, and exhibit a high negative zeta potential values. The produced RB-AuNPs and RB-AgNPs were 90–100 nm and 20–30 nm in size with a thick biological corona layer surrounding them, providing extreme stability but lowering the antimicrobial activity. The antimicrobials study of RB-AgNPs revealed that the nanoparticles have antimicrobial potential with an MBC value of 100 µg/mL against P. aeruginosa and 200 µg/mL against E. coli.

scholarly journals Quantification of silver nanoparticles taken up by single cells using inductively coupled plasma mass spectrometry in the single cell measurement mode

2018 ◽  
Vol 33 (7) ◽  
pp. 1256-1263 ◽  
Author(s):  
Ana López-Serrano Oliver ◽  
Sabine Baumgart ◽  
Wolfram Bremser ◽  
Sabine Flemig ◽  
Doreen Wittke ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Silver Nanoparticles ◽  
Cell Surface ◽  
Inductively Coupled Plasma ◽  
Single Cells ◽  
Analytical Methodology ◽  
Inductively Coupled ◽  
Cell Measurement ◽  
Measurement Mode ◽  
Plasma Mass Spectrometry

A promising analytical methodology is proposed to study nanoparticle-cell interactions providing information of the number of NPs internalized by cells or externally bound to the cell surface.

scholarly journals Role of Organo-Modifier and Metal Impurities of Commercial Nanoclays in the Photo- and Thermo-Oxidation of Polyamide 11 Nanocomposites

Polymers ◽  
2020 ◽  
Vol 12 (5) ◽  
pp. 1034
Author(s):  
Martina Ussia ◽  
Giusy Curcuruto ◽  
Daniela Zampino ◽  
Nadka Tzankova Dintcheva ◽  
Giovanni Filippone ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Oxidative Degradation ◽  
Point Of View ◽  
Size Exclusion ◽  
Polyamide 11 ◽  
Inductively Coupled ◽  
Flight Mass Spectrometry ◽  
Exclusion Chromatography ◽  
Plasma Mass Spectrometry

The photo-oxidative degradation processes of bio-based PA11 nanocomposites containing montmorillonite (MMT) and the organo-modified Cloisite®30B were investigated to discriminate the influence of organo-modified components on the polymer durability. Indeed, despite the extensive studies reported, there are still ambiguous points to be clarified from the chemical point of view. To this aim, UV-aged materials were analyzed by Size Exclusion Chromatography (SEC), Inductively Coupled Plasma–Mass Spectrometry (ICP-MS) and Matrix-Assisted Laser Desorption Ionization Time-of-Flight Mass Spectrometry (MALDI-TOF MS). This enabled determining changes in both chemical structure and Molar Masses (MMs) induced by light, heat and oxygen exposure. The addition of organo-modified nanoclays strongly affected the PA11 light durability, triggering the macromolecular chains scission due to the typical αH, Norrish I and II mechanisms. However, the main contribution in boosting the photo-oxidative degradation is induced by iron impurities contained into the clays. Conversely, thermo-oxidation process performed at 215 °C was unambiguously affected by the presence of the organo-modifiers, whose presence determined an enhancement of crosslinking reactions.

Determination of trace impurities in advanced metallic nuclear fuels by inductively coupled plasma time-of-flight mass spectrometry (ICP-TOF-MS)

2016 ◽  
Vol 31 (7) ◽  
pp. 1480-1489 ◽  
Author(s):  
Abhijit Saha ◽  
Sadhan Bijoy Deb ◽  
Manoj Kumar Saxena
Keyword(s):  
Mass Spectrometry ◽  
Inductively Coupled Plasma ◽  
Nuclear Fuels ◽  
Trace Impurities ◽  
Analytical Methodology ◽  
Inductively Coupled ◽  
Flight Mass Spectrometry ◽  
Plasma Mass Spectrometry ◽  
Metallic Nuclear Fuels

Development of a common analytical methodology for the determination of trace impurities in U–Ti, U–Zr and U–Mo alloy fuels by inductively coupled plasma mass spectrometry.

Sign in / Sign up

Export Citation Format

Share Document