نتایج جستجو برای: radium concentration

تعداد نتایج: 383779  

Journal: :The Canadian journal of urology 2014
Robert B Den Laura A Doyle Karen E Knudsen

INTRODUCTION Bone seeking radiopharmaceuticals have been used for decades in the palliation of pain from bone metastases emerging from prostate cancer. Recent clinical evidence has demonstrated an improved survival in men with metastatic castration resistant prostate cancer (CRPC) with radium 223. MATERIAL AND METHODS A review of the literature was performed to identify the role of radiopharm...

A. Azam, A.H. Naqvi, D.S. Srivastava, M. Shakir Khan,

Background: Everyone is exposed to radon because it is present everywhere with varying concentrations. Radon and its progeny are well established as lung carcinogenic. Materials and Methods: Track etch technique using LR-115 plastic track detectors has been used to measure the effective radium content and radon exhalation rates in soil samples collected from urban area of Etah district...

Journal: :Journal of Radioanalytical and Nuclear Chemistry 2021

Abstract The “powder sandwich” method was adapted to the measuring equipment at Laboratory of Radiometric Expertise, IFJ PAN (Kraków, Poland). versatility has been confirmed. values thoron emanation coefficients (f) for 16 materials have determined. It found that value coefficient is not directly dependent on concentration 224 Ra, other factors are also important, e.g. size grains, inter-grain ...

Journal: :iranian journal of radiation research 0
m. asefi a.a. fathivand iranian nuclear regulatory authority, national radiation protection department, tehran, iran a. amidi a. najafi

abstractbackground : the presence of primordial radionuclide in human habitats has always been a source of prolonged exposure. measurement of naturally occurring radionuclides in the environment can be used as baseline to evaluate the impact of non-nuclear activities and also routine releases from nuclear installations.   materials and methods: a total of 56 samples from 18 different foodstuff ...

2006
Gregory G. Shellenbarger Stephen G. Monismith Amatzia Genin Adina Paytan

We used two short-lived radium isotopes (223Ra, 224Ra) and a mass balance approach applied to the radium activities to determine the nutrient contribution of saline submarine groundwater discharge to the coastal waters of the northern Gulf of Aqaba (Israel). Radium isotope activities were measured along transects during two seasons at a site that lacked any obvious surficial water input. An ons...

Journal: :World journal of radiology 2014
Hinrich A Wieder Michael Lassmann Martin S Allen-Auerbach Johannes Czernin Ken Herrmann

Various single or multi-modality therapeutic options are available to treat pain of bone metastasis in patients with prostate cancer. Different radionuclides that emit β-rays such as (153)Samarium and (89)Strontium and achieve palliation are commercially available. In contrast to β-emitters, (223)Radium as a α-emitter has a short path-length. The advantage of the α-emitter is thus a highly loca...

2012

The purpose of this study is to assess the response of the aquatic environment (sediment, sea water and mussels Mytilus sp.) on uranium and radium activity and concentration following the decrease of phosphate discharges from a technologically improved transhipment terminal, situated at the CroatianAdriatic coast in the port of Sibenik. The highest U activities (485±16 Bq kg" dry weight) and Ra...

2012
Ajay Kumar Surinder Singh

Indoor radon measurements in some dwellings of Rajasthan and Delhi areas have been carried out using LR-115 type II Cellulose Nitrate films in the bare mode. The Radon values vary from 22.30 Bq/m to 219.3 Bq/m in the Delhi region and 55.76 Bq/m to 107.80 Bq/m in the Rajasthan areas, which is well within the recommended action level. The Radon concentration in water samples of some locations of ...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه صنعتی خواجه نصیرالدین طوسی - دانشکده علوم 1391

abstract in the present research solution of chalcopyrite in sulfuric acid in hydrometallurgy method using electrochemistry with cyclic voltammetry technique has been investigated. the value of maximum reduction peak current of copper ions represents the measure of solubility. in this research different parameters temperature, potential, potential exert time, chalcopyrite concentration, sulfur...

2017
Komal Badhan Rohit Mehra

Soil acts as a source of continuous radiation exposure to human and as a medium of migration for transfer of radionuclides to the biological systems hence causes the radiological contamination in the environment. So, it is necessary to study the natural radioactivity in soil to assess the dose due to terrestrial gamma radiation levels in order to know the health risks. The Primordial Radioactiv...

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