Radiation Physics and Chemistry

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artykuł

Effect of γ-irradiation on the physicochemical properties of soy protein isolate films

Myoungsuk Lee, Sehee Lee, Kyung Bin Song

Radiation Physics and Chemistry > 2005 > 72 > 1 > 35-40

To elucidate the effect of γ-irradiation on the physicochemical properties of soy protein isolate (SPI) films, the molecular and mechanical properties of the films were examined after γ-irradiation of the film forming solution at various radiation doses. Gamma-irradiation of SPI solutions caused the disruption of the ordered structure of the soy protein molecules, as well as degradation, cross-linking,...

artykuł

o-Tyrosine hydroxylation by OH radicals. 2,3-DOPA and 2,5-DOPA formation in γ-irradiated aqueous solution

Henryk Żegota, Krzysztof Kołodziejczyk, Maciej Król, Bogusław Król

Radiation Physics and Chemistry > 2005 > 72 > 1 > 25-33

The reactions of radiolytically generated hydroxyl radicals (OH ) with dl-o-tyrosine (o-Tyr) in 10 ^- ³ moldm ^- ³ aqueous solutions, saturated with N ₂ O/O ₂ gas mixture (4:1, v/v), were studied in the dose range between 30 and 270Gy. Two isomeric o-Tyr hydroxylation products, namely, 2,3-dihydroxyphenylalanine (2,3-DOPA) and 2,5-dihydroxyphenylalanine...

artykuł

Radiation-induced degradation of aqueous fluoranthene

Petar Popov, Nikola Getoff

Radiation Physics and Chemistry > 2005 > 72 > 1 > 19-24

The radiation-induced degradation of fluoranthene (FA) in slightly alkaline aqueous solution was investigated in the presence of air as well as of N ₂ O. Depending on the starting FA-concentration the determined G _i (-FA) was 0.34 for 1x10 ^- ⁵ mol/l FA upto 0.67 for 4.6x10 ^- ⁵ mol/l FA. As major radiolytic products found by HPLC-analysis were: 9-fluorene carboxylic...

artykuł

Simple stopping power formula for low and intermediate energy electrons

Hasan Gümüş

Radiation Physics and Chemistry > 2005 > 72 > 1 > 7-12

A simple stopping power formula, modified from that of Rohrlich and Carlson is presented. In this study analytical expressions for effective charge and effective mean excitation energies of target atoms in the modified Rohrlich and Carlson stopping power formula are used, while for effective charge of incoming electrons, Sugiyama's semiempirical formula is used from Peterson and Green. The Lenz-Jensen...

artykuł

Combined effects of gamma irradiation and rosemary extract on the shelf-life of a ready-to-eat hamburger steak

Ju-Woon Lee, Kyung-Sook Park, Jong-Goon Kim, Sang-Hee Oh, więcej

Radiation Physics and Chemistry > 2005 > 72 > 1 > 49-56

To evaluate the effects of the combined treatment of gamma irradiation and rosemary extract powder (rosemary) for improving the quality of a ready-to-eat hamburger steak by changing the storage condition from frozen (-20 ^o C) to a chilled temperature (4 ^o C), an accelerated storage test was carried out. The hamburger steak was prepared with 200 or 500ppm of rosemary, or 200ppm of butylated...

artykuł

Irradiation and modified atmosphere packaging of endive influences survival and regrowth of Listeria monocytogenes and product sensory qualities

Brendan A. Niemira, Xuetong Fan, Kimberly J.B. Sokorai

Radiation Physics and Chemistry > 2005 > 72 > 1 > 41-48

Cut pieces of endive were inoculated with Listeria monocytogenes, packaged in gas-impermeable bags in air, 5/5/90% or 10/10/80% CO ₂ , O ₂ and N2 (''Air-0'', ''5/5'' and ''10/10'', respectively) and irradiated to 0.0 (control), 0.3 or 0.6kGy. At various times during refrigerated storage, samples were taken and a determination made of (a) total microflora, (b) L. monocytogenes, (c)...

artykuł

Calendar of Events

Radiation Physics and Chemistry > 2005 > 72 > 1 > I-II

artykuł

Mass attenuation coefficients of saccharides for low-energy X-rays

Chitralekha, B.R. Kerur, M.T. Lagare, R. Nathuram, więcej

Radiation Physics and Chemistry > 2005 > 72 > 1 > 1-5

Mass attenuation coefficients have been measured for mono- and disaccharides at photon energies 5.947, 6.460 and 14.413keV. The measured values are compared with theoretical calculations. The agreement between experiment and theory is generally within 5%.

artykuł

Editorial Board/Publication information

Radiation Physics and Chemistry > 2005 > 72 > 1 > CO2

artykuł

Transitions and relaxations in gamma-irradiated polypropylene studied by positron annihilation lifetime spectroscopy

N. Djourelov, T. Suzuki, V.P. Shantarovich, T. Dobreva, więcej

Radiation Physics and Chemistry > 2005 > 72 > 1 > 13-18

The changes in the relaxation and transition temperatures in PP due to gamma irradiation in a vacuum were measured by means of positron annihilation lifetime spectroscopy. It was shown that the gamma and beta relaxation temperatures, as well as the melting point follow the changes in the crystallinity with the irradiation dose. For the glass transition temperatures and premelting point, after irradiation...

Opcje filtrowania

Numer:
1
Wolumin:
72
Rok:
2005

Data publikacji

Ustaw własny zakres dat

Słowa kluczowe

IRRADIATION (2)
2,3-DOPA (1)
2,5-DOPA (1)
BOHR CRITERION (1)
BRAGG RULE (1)
DEGRADATION PRODUCTS OF FLUORANTHENE RADIOLYSIS (1)
EFFECTIVE CHARGE (1)
EFFECTIVE MEAN EXCITATION ENERGY (1)
ELECTRON STOPPING POWER (1)
FLUORANTHENE (1)
FLUORANTHENE RADIOLYSIS (1)
FOODBORNE PATHOGEN (1)
GAMMA IRRADIATION (1)
HAMBURGER STEAK (1)
HYDROXYL RADICAL (1)
MASS ATTENUATION COEFFICIENT (1)
O-TYROSINE (1)
PEROXYL RADICAL (1)
PHENOL RING HYDROXYLATION (1)
PHYSICOCHEMICAL PROPERTIES (1)
POLYPROPYLENE (1)
POSITRON ANNIHILATION (1)
READY-TO-EAT FOOD (1)
RELAXATION (1)
SHELF-LIFE (1)
SOY PROTEIN ISOLATE FILMS (1)
STORAGE (1)
TRANSITION (1)
VEGETABLE (1)
X-RAY ATTENUATION COEFFICIENT (1)
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