Analysis of albumin fatty acid binding capacity in patients with benign and malignant colorectal diseases using electron spin resonance (ESR) spectroscopy

Different concentrations ofmethanol aqueous solution with or without 0.5% acetic acid and 80% acetone were used to achieve the highest yield of extraction of phenolics from Induna apple pomace. The highest content of phenolics (6.38 mg/g) was detected in the 80% methanol extract. The influence of 80% methanol extract of Induna apple pomace on stable l,l-diphenyl-2-picrylhydrazyl (DPPH) and reactive hydroxyl radicals has been investigated by electron spin resonance (ESR) spectroscopy. Based on the obtained results it can be concluded that the investigated extract is more effective in the DPPH test than on the DMPO-OH scavenging. In both cases antioxidant activity increased with increasing concentration of the investigated extract. The high contents ofphenolics (6.38 mg/g), flavonoids (1.01 mg/g) and flavan-3-ols (0.70 mg/g) in 80% methanol extract indicated that these compounds contributed to the antioxidant activity of Induna apple pomace.

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Electron spin resonance (ESR) spectroscopy study of cheese treated with accelerated electrons

Food Chemistry ◽

10.1016/j.foodchem.2018.09.101 ◽

2019 ◽

Vol 276 ◽

pp. 315-321 ◽

Cited By ~ 4

Author(s):

Rosa Escudero ◽

Jose Segura ◽

Raquel Velasco ◽

Margarita Valhondo ◽

M. Dolores Romero de Ávila ◽

...

Keyword(s):

Electron Spin Resonance ◽

Electron Spin ◽

Esr Spectroscopy ◽

Spectroscopy Study ◽

Accelerated Electrons ◽

Spin Resonance

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An ESR and calorimetric study of iron oolitic samples from the Northampton ironstone

Clay Minerals ◽

10.1180/claymin.1990.025.3.06 ◽

1990 ◽

Vol 25 (3) ◽

pp. 303-311 ◽

Cited By ~ 9

Author(s):

A. U. Gehring ◽

R. Karthein

Keyword(s):

Electron Spin Resonance ◽

Electron Spin ◽

Hyperfine Splitting ◽

Esr Spectroscopy ◽

Thermal Conversion ◽

Esr Spectra ◽

Calorimetric Study ◽

Calorimetric Methods ◽

Mineral Phases ◽

Spin Resonance

AbstractElectron spin resonance (ESR) spectroscopy and calorimetric methods were used to characterize conversion processes in multimineral samples from the Northampton ironstone (NIS) at temperatures between 25°C and 800°C. The beginning of the thermal conversion processes can be determined by the formation of asymmetric ESR spectra with g ≈ 2 at 250°C. The breakdown of the berthierine structure between 250°C and 520°C is indicated by the disappearance of the hyperfine splitting in the Mn2+ spectrum and the formation of magnetite. The decomposition of siderite and calcite was found by calorimetric methods at 580°C and 700°C, respectively. The hematite formation between 550°C and 800°C is explained by the decomposition of siderite but also by the oxidation of previously formed magnetite. The occurrence of hematite as the dominant ferric oxide at 800°C signifies the end of the conversion process of the major mineral phases in the NIS samples.

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Probing paramagnetic species in titania-based heterogeneous photocatalysis by electron spin resonance (ESR) spectroscopy—A mini review

Chemical Engineering Journal ◽

10.1016/j.cej.2010.12.002 ◽

2011 ◽

Vol 170 (2-3) ◽

pp. 353-362 ◽

Cited By ~ 182

Author(s):

Zhaohui Wang ◽

Wanhong Ma ◽

Chuncheng Chen ◽

Hongwei Ji ◽

Jincai Zhao

Keyword(s):

Electron Spin Resonance ◽

Electron Spin ◽

Esr Spectroscopy ◽

Heterogeneous Photocatalysis ◽

Paramagnetic Species ◽

Spin Resonance

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1P121 Analysis of Daphnia resting eggs by electron spin resonance(ESR) spectroscopy

Seibutsu Butsuri ◽

10.2142/biophys.44.s60_1 ◽

2004 ◽

Vol 44 (supplement) ◽

pp. S60

Author(s):

M. Sakata ◽

T. Kawasaki ◽

T. Shibue ◽

A. Takada ◽

H. Yoshimura ◽

...

Keyword(s):

Electron Spin Resonance ◽

Electron Spin ◽

Esr Spectroscopy ◽

Resting Eggs ◽

Spin Resonance

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Investigation of Gamma Radiation on Hydroxyapatite Synthesized from Chicken Eggshell by ESR Spectroscopy

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1125.416 ◽

2015 ◽

Vol 1125 ◽

pp. 416-420

Author(s):

Kanokwan Boonsook ◽

Weeranuch Kaewwiset ◽

Ekachai Hoonnivathana ◽

Pichet Limsuwan ◽

Kittisakchai Naemchanthara

Keyword(s):

Electron Spin Resonance ◽

Gamma Radiation ◽

Electron Spin ◽

Esr Spectroscopy ◽

Chemical Precipitation ◽

Precipitation Method ◽

Spin Resonance ◽

Chicken Eggshell ◽

Radiation Induced ◽

Gamma Irradiated

The purpose of this work was investigated the properties and characteristic of gamma radiation on hydroxyapatite which synthesized from biowaste chicken eggshell via the chemical precipitation method. The hydroxyapatite from biowaste chicken eggshell was gamma irradiated in rage 10 Gy to 1 kGy and analyzed by electron spin resonance (ESR). The optimize parameter set ESR read out of Hydroxyapatite were such as microwave power and modulate amplitude corresponded 63.34 mW and 2 mT, respectively. The ESR signal based on the measurement of the concentration of radiation induced radicals CO2- molecular ion also formed in hydroxyapatite. The relative of ESR intensity and dose response was linear. These experiments indicated that the hydroxyapatite from biowaste chicken eggshell could be used good dosimeter in rage 20 to 100 Gy.

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An electron spin resonance and CIDEP study of the photoreduction of tert-butyl-p-benzoquinones

Canadian Journal of Chemistry ◽

10.1139/v78-145 ◽

1978 ◽

Vol 56 (6) ◽

pp. 869-877 ◽

Cited By ~ 20

Author(s):

Terry Foster ◽

A. John Elliot ◽

Babatunde B. Adeleke ◽

Jeffrey K. S. Wan

Keyword(s):

Electron Spin Resonance ◽

Electron Spin ◽

Chemical Equilibrium ◽

Esr Spectroscopy ◽

Semiquinone Radical ◽

Phenoxy Radical ◽

Decay Kinetics ◽

Tert Butyl ◽

Semiquinone Radicals ◽

Spin Resonance

The photoreduction of 2-tert-butyl-p-benzoquinone and 2,5- and 2,6-di-tert-butyl-p-benzoquinone were studied by esr spectroscopy. In the photolysis of 2,6-di-tert-butyl-p-benzoquinone, only one semiquinone radical was observed and its decay kinetics were monitored by esr. The reduction of the triplet 2-tert-butyl-p-benzoqinone leads to the formation of isomeric semiquinone radicals 1 and 2 in the primary photochemical processes, and this is then followed by a chemical equilibrium between the two isomeric radicals. The relative rates of formation of the two radicals cannot be monitored by conventional esr methods but the CIDEP results show that the formation of radical 2 is about five to seven times faster than that of radical 1. A secondary reaction of the phenoxy radical with a product benzohydrofuran 4 leads to the observation of a polarized radical 3 which derives all its polarization from the primary phenoxy radical.

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