Published July 1977
| Version v1
Journal article
The RBE of 30 kV X-rays for the induction of dicentric chromosomes in human lymphocytes
Creators
- 1. Goettingen Univ. (Germany, F.R.). Inst. fuer Medizinische Physik und Biophysik
- 2. Goettingen Univ. (Germany, F.R.). Inst. fuer Humangenetik
Description
The frequency of dicentric chromosomes induced by the irradiation of human lymphocytes in G0 phase was determined with hard (150 kV) and soft (30 kV) X-rays. When a linear-quadratic dose-effect relation was used to fit the experimental data, a significant linear contribution was found for 30 kV X-rays. The RBE of 30 kV compared with 150 kV X-rays approaches the value 3 at a 30 kV X-ray dose of 20 rad and decreases with increasing dose. From the results it may be concluded that chromatids with primary breaks, indergoing second order reactions and thus forming dicentric chromosomes, are producted by traversals of low-energy electrons through chrmomatin material. (orig.)
Abstract (German)
Die Haeufigkeit von durch Bestrahlung menschlicher Lymphozyten in der G0-Phase induzierten dizentrischen Chromosomen wurde mit harter (150 kV) und weicher (30 kV) Roentgenstrahlung bestimmt. Bei Anpassung der Versuchsdaten mit Hilfe einer linear-quadratischen Dosis-Effekt-Beziehung fand sich ein signifikanter linearer Beitrag bei 30 kV Roentgenstrahlung. Im Vergleich zur 150 kV Roentgenstrahlung naehert sich der RBE von 30 kV bei einer Dosis von 20 rad dem Wert 3 und nimmt mit steigender Dosis ab. Die Ergebnisse lassen vermuten, dass Chromatiden mit Primaerbruechen, die eine Reaktion zweiter Ordnung durchmachen und dabei dizentrische Chromosomen bilden, durch den Durchgang energiearmer Elektronen durch Chromatinmaterial erzeugt werden. (orig.)Additional details
Identifiers
- DOI
- 10.1007/bf01332147;
Publishing Information
- Journal Title
- Radiation and Environmental Biophysics
- Journal Volume
- 14
- Journal Issue
- 2
- Series
- Radiat. Environ. Biophys.
- Journal Page Range
- 109-121
- ISSN
- 0301-634X
INIS
- Country of Publication
- Germany
- Country of Input or Organization
- Germany
- INIS RN
- 9349714
- Subject category
- S63: RADIATION, THERMAL, AND OTHER ENVIRONMENTAL POLLUTANT EFFECTS ON LIVING ORGANISMS AND BIOLOGICAL MATERIALS;
- Descriptors DEI
- CHROMOSOMAL ABERRATIONS; DICENTRIC CHROMOSOMES; DOSE-RESPONSE RELATIONSHIPS; ELECTRON DIFFRACTION; EXTERNAL IRRADIATION; HARD X RADIATION; INDUCTION; LYMPHOCYTES; MAN; SOFT X RADIATION; STATISTICS; STRAND BREAKS
- Descriptors DEC
- ANIMAL CELLS; ANIMALS; BIOLOGICAL MATERIALS; BLOOD; BLOOD CELLS; BODY FLUIDS; CHROMOSOMES; COHERENT SCATTERING; CONNECTIVE TISSUE CELLS; DIFFRACTION; ELECTROMAGNETIC RADIATION; IONIZING RADIATIONS; IRRADIATION; LEUKOCYTES; MAMMALS; MATHEMATICS; MUTATIONS; PRIMATES; RADIATIONS; SCATTERING; SOMATIC CELLS; VERTEBRATES; X RADIATION
Optional Information
- Notes
- 4 figs.; 2 tabs.; 23 refs.; Updated automatically by Metadata and Full-Text Enrichment Agent