ABSTRACT
Marine fish is an important daily diet item for the people of Turkey. The Black Sea Region of Turkey was contaminated by the Chernobyl accident in 1986, a comprehensive study was planned and carried out to determine the radioactivity levels ((226)Ra, (232)Th, (40)K and (137)Cs) and heavy metal concentrations (As, Mn, Fe, Cr, Ni, Zn, Cu and Pb) in four of the most common fish species: Engraulis encrasicholus (anchovy), Oncorhynchus mykiss (trout), Trachurus mediterranus (bluefin) and Merlangius merlangus (whiting) samples collected from eight stations in the Black Sea Region of Turkey during 2010. The dose due to consumption of fish by the public was estimated and it was shown that this dose imposes no threat to human healthy. The concentrations of heavy metal are below the daily intake recommended by the international organizations.
Subject(s)
Fishes/metabolism , Metals, Heavy/metabolism , Water Pollutants, Chemical/metabolism , Water Pollutants, Radioactive/metabolism , Animals , Black Sea , Diet/statistics & numerical data , Environmental Exposure/analysis , Environmental Exposure/statistics & numerical data , Humans , Seafood/statistics & numerical data , TurkeyABSTRACT
The natural radioactivity levels in soil and sediment samples of Firtina Valley have been determined. To our knowledge, there seems to be no information about radioactivity level in the Firtina Valley soils and sediments so far. For this reason, soil and sediment samples were collected along the Firtina Valley and analysis on the collected samples were carried out to determine 238U, 232Th, 40K and 137Cs radioisotopes using high purity germanium detector. The activity concentrations obtained for 226Ra, 214Pb, 214Bi, 228Ac, 208Tl, 40K and 137Cs are given in the unit of Bq/kg. The results have been compared with other radioactivity measurements in different country's soils and sediments. The radium equivalent activity (Raeq), the absorbed dose rate (D), the external hazard index (Hex), the annual gonadal dose equivalent (AGDE) and the annual effective dose equivalent (AEDE) were also calculated and compared with the international recommended values.
Subject(s)
Soil Pollutants, Radioactive/analysis , Geologic Sediments , Radiation Dosage , Radioactive Pollutants/analysis , Radioactivity , Soil Pollutants, Radioactive/standards , TurkeyABSTRACT
It is widely accepted that tumoral invasion of the pre-epiglottic space (PES) has a significant prognostic importance in supraglottic laryngeal carcinomas. The lymphatics of the supraglottic larynx drain to cervical lymph nodes via the PES. Since the supraglottic larynx is an embryological unit that contains the PES, malignant lesions of this region must be resected with en bloc surgery, including the PES. Tumors with PES invasion are already considered to be T3 in TNM staging. The purpose of this study was to review the clinical experience we have had with these tumors at Ankara University. The study comprised 150 patients with squamous cell carcinomas of the supraglottic larynx treated with either partial or total laryngectomies. Findings suggested that PES invasion occurred at early stages of supraglottic tumor progression. Suprahyoid epiglottic lesions behaved less aggressively than tumors originating from other supraglottic subsites and did not invade the PES until advanced stages. PES invasion was not considered to be a significant prognostic factor because the majority of the supraglottic lesions studied demonstrated PES invasion regardless of cervical lymph node metastases. Analysis of oncological and functional results revealed that en bloc resection of the supraglottis with the PES was facilitated by preservation of the hyoid bone.
