[en] Systematic properties of the collective nuclear structure in the Z=53 I isotopes have been investigated at Stony Brook and Daresbury from neutron number N=60 to 70. Several fascinating features have been observed. The Z=54 shell gap at oblate shapes is influential in the structure. Coexisting prolate and oblate shapes yield the characteristic rotational bands for the πh_11/2 and πg_7/2(d_5/2) orbitals in ^117-123I. Non-collective oblate shapes cause abrupt termination of the πh_11/2 prolate bands in ^115-121I. Recent EUROGRAM data, which defined an intruder band to high rotational frequencies in ¹¹³I, show a slow decrease in the moment of inertia with spin suggesting a gradual termination, similar to the light Sb intruder bands. Several other interesting properties related to the Z=50 region are discussed

[en] This review was presented as a plenary lecture at the International Symposium on Radioiodines. The chemical nature of iodinating species are reviewed with emphasis on biological iodinations and goitrogens. (author)

[en] Neutron activation analysis for ¹²⁹I at levels close to the detection limit requires consideration of radionuclide and nuclear reaction interferences. Low-level gamma-ray spectrometer methods for detection and measurement of interferences have been developed. Procedures which control or eliminate potential ¹²⁹I measurement errors during pre-irradiation separation, neutron activation, post-irradiation separation, radiation counting and data analysis are needed. (author)

[en] The ratio of dose factors occurring during inhalation and ingestion to the respective dose factors of I-129 is calculated for the isotopes of I-123 to I-126 and I-129 to I-135. All the dose factors refer to the thyroid as the critical organ. A distinction is made between adults and infants up to 1 year of age. To calculate the ratios only the effective energies and the effective half-lives in the human body and on grass are required. Most of the data have been taken from the literature. The effective energies of I-123 and I-125 have been calculated as examples. (orig.)

[en] A survey is given of major iodination reactions used for labelling organic compounds with iodine radioisotopes. A review is given of preparations used in nuclear medicine for in vivo diagnosis, broken up according to the reaction mechanism of radioiodination

[en] Radioiodinated bleomycin is a useful imaging agent for body tissues. Its production by iodination of bleomycin with radioactive iodide ions in the presence of an oxidizing agent is described. 7 claims, no drawings

No abstract available

[en] The paper presents a method of receiving iodoinsulin with preserved biological activity. As a raw material recrystallized bovine insulin produced by ''Polfa'' was used. Chloramine T was used as an oxidizing agent in the iodize reaction. Insulin was marked with ¹²⁵I or ¹²⁷I in the rate of molar concentration of NaI and insulin 0.6. The obtained product contained about 0.3 of iodine atom per one insulin molecule. Specific radioactivity of the iodoinsulin was between 77 and 147 μCi/μg. Such an insulin was in over 95% precipitable with trichloroacetic acid. Its immunological reactivity varied from 89% to 100% while biological activity, determined with the consumption of glucose by the fatty tissue of epididymis of rat, was 92% +- 24% of the native insulin activity. Half-life time of ¹²⁵I insulin in the rat blood circulation was determined. Curve of the isotope disappearance was biphasic. Half-life time of the first phase (shorter one) was 0.64 +- 0.2 minute while the longer phase 8.89 +- 2.16 minutes. (author)

[en] The estimation of individual doses for radiation protection and for risk assessment purposes from a radioiodine intake requires a knowledge of the distribution and retention of the radioiodine (primarily in the thyroid), and a knowledge of the average energy deposited in each organ of interest per radioactive decay (S-factors). This paper reviews a model for distribution and retention used previously for adults, and extends the model to include all ages. The extended model also includes the effects of stable iodine intakes on radioiodine uptakes explicitly. Included in the paper is a tabulation of existing adult S-factors for selected radioiodines and the extension of S-factors for the thyroid to all age groups. Finally, doses per unit intake are calculated and tabulated. A discussion and some calculations of the effects of stable iodine intake on committed doses are given. (author)

[en] A short review on the development and future prospects of radioiodine isotopes with special emphasis on ₁₂₃I, ₁₂₅I and ₁₃₁I products, as well as their use in medical practice is presented. (A.L.)