ESR study of calix[4]arene by spin-trapping method

2000 ◽  
Vol 18 (3) ◽  
pp. 419-424 ◽  
Author(s):  
Q. Wang ◽  
Y. Li ◽  
G. S. Wu
Keyword(s):  
Spin Trapping ◽  
Trapping Method

scholarly journals Electrospun Nanosystems Based on PHBV and ZnO for Ecological Food Packaging

Polymers ◽  
2021 ◽  
Vol 13 (13) ◽  
pp. 2123
Author(s):  
Maria Râpă ◽  
Maria Stefan ◽  
Paula Popa ◽  
Dana Toloman ◽  
Cristian Leostean ◽  
...  
Keyword(s):  
Food Packaging ◽  
Spin Trapping ◽  
X Ray Diffraction ◽  
Paramagnetic Resonance ◽  
Hno3 Solution ◽  
X Ray ◽  
Trapping Method ◽  
Ft Ir ◽  
Doped Zno ◽  
Electron Paramagnetic

The electrospun nanosystems containing poly(3-hydroxybutyrate-co-3-hydroxyvalerate) (PHBV) and 1 wt% Fe doped ZnO nanoparticles (NPs) (with the content of dopant in the range of 0–1 wt% Fe) deposited onto polylactic acid (PLA) film were prepared for food packaging application. They were investigated by scanning electron microscopy (SEM), energy dispersive X-ray (EDX), Fourier transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), antimicrobial analysis, and X-ray photoelectron spectrometry (XPS) techniques. Migration studies conducted in acetic acid 3% (wt/wt) and ethanol 10% (v/v) food simulants as well as by the use of treated ashes with 3% HNO3 solution reveal that the migration of Zn and Fe falls into the specific limits imposed by the legislation in force. Results indicated that the PLA/PHBV/ZnO:Fex electrospun nanosystems exhibit excellent antibacterial activity against the Pseudomonas aeruginosa (ATCC-27853) due to the generation of a larger amount of perhydroxyl (˙OOH) radicals as assessed using electron paramagnetic resonance (EPR) spectroscopy coupled with a spin trapping method.

Photocatalytic Degradation of 4-Chlorophenol by •OH Radicals Generated by Thiophene Oligomers Incorporated in ZSM-5 Zeolite Channels

2003 ◽  
Vol 68 (11) ◽  
pp. 2219-2230 ◽  
Author(s):  
Gabriel Čík ◽  
Milada Hubinová ◽  
František Šeršeň ◽  
Jozef Krištín ◽  
Monika Antošová
Keyword(s):  
Reactive Oxygen Species ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
Maleic Acid ◽  
Aqueous Suspension ◽  
Reactive Oxygen ◽  
Spin Trapping ◽  
Oh Radicals ◽  
Oxygen Species ◽  
Trapping Method

Degradation of 4-chlorophenol by reactive oxygen species was studied, the latter being generated by photo-assisted reactions of thiophene oligomers, synthesized in channels of the Na-ZSM-5 zeolite. The photoreaction was carried out in an aqueous suspension of photocatalyst, irradiated with visible light (λ > 400 nm). The spin-trapping method was used to detect the generated •OH radicals. The main products of the photodecomposition of 4-chlorophenol were found to be phenol, hydroquinone and maleic acid.

scholarly journals Determination of Radical Species in the Kidney of Rats with Chronic Renal Failure by the Spin Trapping Method

Nephron ◽  
1995 ◽  
Vol 70 (3) ◽  
pp. 382-384 ◽  
Author(s):  
Takako Yokozawa ◽  
Naoki Fujitsuka ◽  
Hikokichi Oura ◽  
Akitane Mori ◽  
Hiroshi Kashiwagi
Keyword(s):  
Renal Failure ◽  
Chronic Renal Failure ◽  
Spin Trapping ◽  
Radical Species ◽  
Trapping Method

Study of Short-lived Chlorine- and Sulphur-containing Radicals by the Spin-trapping Method

1978 ◽  
Vol 47 (3) ◽  
pp. 281-296 ◽  
Author(s):  
R Kh Freidlina ◽  
I I Kandror ◽  
Rashid G Gasanov
Keyword(s):  
Spin Trapping ◽  
Trapping Method

The Detection of Alkoxy and Other Radicals in the Gamma Radiolysis of Alcohols by an Electron Spin Resonance and Spin Trapping Method

1974 ◽  
Vol 52 (21) ◽  
pp. 3645-3650 ◽  
Author(s):  
Frederick Peter Sargent ◽  
Edward Michael Gardy
Keyword(s):  
Electron Spin Resonance ◽  
Carbon Atom ◽  
Electron Spin ◽  
Spin Trapping ◽  
Methyl Radicals ◽  
Alkoxy Radicals ◽  
Spin Resonance ◽  
Gamma Radiolysis ◽  
Trapping Method

The radicals produced during γ radiolysis of methanol, ethanol, 1-propanol, 2-propanol, and t-butanol have been trapped by reaction with 2-nitroso-2-methylpropane (t-nitrosobutane) to give nitroxides which are detected by e.s.r.[Formula: see text]All the alcohols gave alkoxy radicals and, with the exception of t-butanol, radicals derived by the loss of an H atom from the carbon atom adjacent to the OH group. Methyl radicals were detected in t-butanol.

Kinetic model for formation of DMPO-OH in water under ultrasonic irradiation using EPR spin trapping method

2012 ◽  
Vol 38 (9) ◽  
pp. 2191-2204 ◽  
Author(s):  
Masaki Kubo ◽  
Kazuhiro Sekiguchi ◽  
Naomi Shibasaki-Kitakawa ◽  
Toshikuni Yonemoto
Keyword(s):  
Kinetic Model ◽  
Ultrasonic Irradiation ◽  
Spin Trapping ◽  
Trapping Method ◽  
Epr Spin Trapping
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