gamma. irradiation of aqueous solutions of human hemoglobin in atmospheres of air and argon
In this study, the degrees of destruction of hemoglobin irradiated in atmospheres of air and argon were compared. Hemoglobin preparations were irradiated in the forms: oxyhemoglobin (HbO/sub 2/) deoxyhemoglobin (Hb/sup 2 +/) and methemoglobin (MetHb) applying doses of 0.5 to 5 Mrad. The degree of hemoglobin destruction was estimate on the basis of changes in the values of the absorption coefficient at the Soret band, the absorption ratio A/sub 505//A/sub 563/ determined after conversion of irradiated preparations into MetHb, absorption coefficinets for pyridine hemochromogen obtained from irradiated preparations, and changes in parameters characterizing the hemoglobin oxygenation reaction (log p/sub 1/2/O/sub 2/ and the Hill n coefficient). The calculated oxygen enhancement ratios S were generally higher than 1 for the parameters estimated. This indicates that the presence of oxygen during irradiation enhances hemoglobin destruction.
- Research Organization:
- Univ. of Lodz, Poland
- OSTI ID:
- 6221802
- Journal Information:
- Radiat. Res.; (United States), Journal Name: Radiat. Res.; (United States) Vol. 78:3; ISSN RAREA
- Country of Publication:
- United States
- Language:
- English
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400600 -- Radiation Chemistry
560111* -- Radiation Effects on Biochemicals-- In Vitro-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AQUEOUS SOLUTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
CARBOXYLIC ACIDS
CHEMICAL RADIATION EFFECTS
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
CHEMISTRY
COBALT 60
COBALT ISOTOPES
CRYOGENIC FLUIDS
DATA
DATA FORMS
DECOMPOSITION
DISPERSIONS
ELECTROMAGNETIC RADIATION
ELEMENTS
EXPERIMENTAL DATA
FLUIDS
GAMMA RADIATION
GLOBIN
GRAPHS
HEMOGLOBIN
HETEROCYCLIC ACIDS
HETEROCYCLIC COMPOUNDS
HYDROGEN COMPOUNDS
IN VITRO
INFORMATION
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
IONIZING RADIATIONS
IRON
IRRADIATION
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
METALS
METHEMOGLOBIN
MINUTES LIVING RADIOISOTOPES
MIXTURES
NONMETALS
NUCLEI
NUMERICAL DATA
ODD-ODD NUCLEI
ORGANIC ACIDS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OXYGEN
OXYGEN COMPOUNDS
OXYGEN ENHANCEMENT RATIO
PIGMENTS
PORPHYRINS
PROTEIN DENATURATION
PROTEINS
RADIATION CHEMISTRY
RADIATION EFFECTS
RADIATIONS
RADICALS
RADIOINDUCTION
RADIOISOTOPES
RADIOLYSIS
RADIOSENSITIVITY EFFECTS
SOLUTIONS
TABLES
TRANSITION ELEMENTS
VALENCE
WATER
YEARS LIVING RADIOISOTOPES
YIELDS