Radioactivity

Brachytherapy is a form of radiotherapy in which radioactive sources are placed at short distances from, or even inside the target volume. The use of high dose rate brachytherapy is a widely accepted and clinically proven treatment for some stages of prostate cancer. The aim of this project was to investigate potential improvements on two of the most important aspects of high dose rate (HDR) and pulsed dose rate (PDR) prostate brachytherapy - prostate definition and treatment delivery verification.

121p runthenight05 01-03-2023 6 3   Download

The objectives of the thesis is: Determination of the concentration of the Naturally Occurring Radioactive Materials (NORM) in some building materials commonly used in Lao PDR such as cement, sand, etc. by gamma spectrometers using NaI(Tl) and HPGe detectors.

27p larachdumlanat129 20-01-2021 51 3   Download

The radio nuclei present in the damaged fuel are supposed to be released into the main heat transport system and after that into the containment building in the worst case scenario. Assessing the radioactive nuclei maximum release is the purpose of the present paper.

7p christabelhuynh 31-05-2020 12 2   Download

In this paper we propose a method for the creation of oxide layers on stainless steel 304L with europium (Eu) as contaminant. This technique consists in spraying an Eu-solution on stainless steel samples.

7p christabelhuynh 30-05-2020 7 1   Download

SGaRD (Spectroscopy, Gamma rays, Rapid, Deterministic) code is used for the fast calculation of the gamma-ray spectrum, produced by a spherical shielded source and measured by a detector. The photon source lines originate from the radioactive decay of the unstable isotopes.

8p christabelhuynh 30-05-2020 19 4   Download

A new composite material with neutron radiation shielding properties is presented. This fiber reinforced concrete material incorporates basalt-boron fiber, with different concentrations of boron oxide in fiber, and is applicable to nuclear energy and nuclear waste management.

8p christabelhuynh 29-05-2020 16 0   Download

The deep geological repository (DGR) is considered as the definitive management solution for high-level waste (HLW). Countries defined different DGR implementation schedules, depending on their national context and political choices.

13p christabelhuynh 30-05-2020 13 0   Download

In this communication, we will present our current developments of an instrument that combines these methods and parameters for specific applications in the field of nuclear investigations.

14p christabelhuynh 30-05-2020 8 1   Download

The aim of this article is to evaluate the influence of the change in the Dissolved Hydrogen (DH) concentration on the contamination of the primary loops of DOEL-4 PWR, a Belgian unit. After the description of the principle of the OSCAR V1.3 code, its use is illustrated with the simulation of DOEL-4.

12p christabelhuynh 29-05-2020 8 1   Download

Safety case implications will also be assessed through the study of the disposability of thermally treated waste products. This paper will communicate the strategic aims of the ongoing project and highlight some key findings and results achieved to date.

7p christabelhuynh 29-05-2020 9 1   Download

RD&D will continue to be necessary to develop, maintain and consolidate knowledge throughout the stepwise development, operation and closure of disposal facilities, which will be spread over many decades and make this knowledge available to all end users.

9p christabelhuynh 29-05-2020 9 0   Download

Nuclear decommissioning is a worldwide competitive market. It is also the main source of radioactive waste from the nuclear energy field. In order to reduce the waste volume it is necessary to sort the actual radioactive waste to be disposed of and to separate them from other materials that could be recycled.

5p christabelhuynh 29-05-2020 11 0   Download

This study already demonstrate the high potential of microfluidic technology to improve analytical operations on D&D samples. This method will further be validated with radioactive samples.

6p christabelhuynh 29-05-2020 7 1   Download

An experimental analysis of the effect of gamma and X-ray irradiation with dose rate 0.25 -6mSv/h on low-density polyethylene (LDPE) and PMMA samples is presented. The focus of attention is on their DC conductivity as a dielectric of a capacitor.

10p tohitohi 19-05-2020 31 2   Download

A systematic search for Escherichia coli proteins with the zinc-binding activity was performed using the assay of radioactive Zn(II) binding to total E. coli proteins fractionated by two methods of two-dimensional gel electrophoresis. A total of 30–40 radioactive spots were identified, of which 14 have been assigned from N-terminal sequencing.

11p research12 01-06-2013 35 3   Download

Metabolite channelling, the process in which consecutive enzymes have confined substrate transfer in metabolic pathways, has been proposed as a biochemical mechanism that has evolved because it enhances catalytic rates and protects unstable intermediates. Results from experiments on the synthesis of radioactive urea [Cheung, C., Cohen, N.S. & Raijman, L (1989)J. Biol. Chem.264, 4038–4044] have been interpreted as implying channelling of arginine between argininosuccinate lyase and arginase in permeabi-lized hepatocytes. ...

9p tumor12 20-04-2013 35 1   Download

The toxicity of the pea albumin 1b (PA1b), a 37 amino-acid peptide extracted from pea seeds, for cereal weevils (Sito-philus oryzae, Sitophilus granariusandSitophilus zeamais) was recently discovered.The mechanism of action of this new entomotoxin is still unknown and potentially involves a target protein in the insect tissues.This work describes the characterization of a high-affinity binding site for PA1b in a microsomal fraction ofSitophilusspp.extracts.Purified PA1b was labeled to a high specific radioactivity (c.

7p fptmusic 16-04-2013 37 3   Download

Transcription factors are DNA-binding proteins that regulate key biologi-cal processes. Their interactions with DNA are commonly analyzed with gel-based electrophoretic mobility shift assay (EMSA) using radioactively labeled probes. Within various fields of research, there exists an increasing demand to develop assays with faster sample throughput combined with improved sensitivity, increased analytical range, and precise quantification.

9p vinaphone15 28-02-2013 48 3   Download