[en] Strawberries samples were irradiated with X rays at 0, 0,5, 1, 2 KGy and stored during 27 days at 4 degrees Celsius in humidity close to saturation. During storage, texture, colour, organic acids, ascorbic acid, pH and development of mouldiness were assessed. Ripening was observed according to the doses of irradiation. As a conclusion, the results confirm the fragility of strawberries to irradiation and consequently the need of an other technology combining other preservation techniques such as controlled atmospheres. (author)

[en] This book presents summaries of the current information on subtopics in dosimetry of ionizing radiation; each accompanied by an extensive reference list

[en] The nature of radicals formed in poly(vinyl butyral) films exposed to ionizing radiation was studied. The existence of three types of radicals, which convert to each other upon the warming of the sample from 77 K to room temperature, was established

[en] Increasing the level of ionizing radiation has a negative effect on human life. Compliance with the basic principles determines the safety of the environment in its original form. Taking into account the fact of the wide use of natural aluminosilicates, in particular bentonite clays, in industry and everyday life, it was of scientific and practical interest to study the distribution of radioactive elements in them. A number of bentonite clays selected from various deposits of the Azerbaijan Republic has been analyzed.

[en] Using non-volatile semiconductor memories as dosimeters in radiation protection is made possible by the application of the so-called DIS (Direct Ion Storage) method, where the charge collected from a small volume of gas is directly stored in a non-volatile memory cell. This allows the construction of small and simple electronic passive dosimeters with features not available in conventional passive Film or TLD dosimeters. The basic design principles and properties of DIS dosimeters are presented and the application potential for the measurement of various categories of ionizing radiation is discussed

[en] Radiation protection in its broadest sense is a multidisciplinary human function exemplifying in all meaningful respects the innate ability of dedicated persons to apply with both general and specialized expertise knowledge derived from a great many scientific and technical fields. The aim of this address is to outline from a regulatory viewpoint the precedents, principles and practices of radiation protection, a very essential human function

No abstract available

[en] The legal aspect of occupational diseases is briefly treated in this article. Some notions of elementary physics about radioactivity and ionizing radiations are found in the annex

[en] Rapid technical developments and an expanding list of clinical applications that provide new diagnostic information or supplant less accurate or more invasive diagnostic tests have led to a dramatic increase in the use of CT imaging since its introduction in 1973. Our purpose is to discuss the medical benefit of CT imaging given the small risk associated with ionizing radiation used in CT in the context of medical justification, focusing on exam appropriateness, individualization of CT techniques, and decision support tools. (author)

[en] A study was performed on rats to verify the effects of ionizing radiation on the structure of the parotid glands of young rats. Thirty twenty five-day old rats (Holtzman) were equally distributed into two experimental groups: Group 1 - irradiated; Group II - control. Using a conventional X-ray apparatus, the region of the parotid glands was irradiated with a dose of 300 R, this procedure was repeated every 48 hours up to an exposition of 1200 R. After periods of 3, 8, 13, 18, and 28 days, the animals belonging to both groups were sacrificed and the parotid glands removed and fixed in 10% formalin and Bouin liquid for 24 hours. The sections were stained by hematoxylin and eosin and Mallory's Thricromic, allowing analysis through the usual optical microscope. The following conclusions may be drawn through the methodology used: the Group 1 - rats gained body weight uniformly after the 13 sup(th) day, although this was not equivalent to the control group; the critical phase of glandular disorganization determined by irradiation corresponded to the experimental period of 8 days, decreasing in the subsequent days; the serous acini and the striated ducts showed to be more radium sensitive even under the use of low fractionated doses; the parotid glands showed indications of gradual morphological recovery after the last exposition to X-rays. (author)