Adriano Duatti
(International Atomic Energy Agency (IAEA))
19/09/2011, 08:30
Progress in nuclear medicine has been always closely connected to the availability of a variety of radionuclides having both suitable decay characteristics and chemical properties to allow the development of useful diagnostic and therapeutic agents. Since there’s no ‘universal’ radionuclide capable to cover all clinical needs and imaging applications, nuclear medicine still relies on the...
Boris Zhuikov
(Institute for Nuclear Research of Russian Academy of Sciences)
19/09/2011, 08:50
Production of isotopes for medical diagnostics and therapy is located in several institutions based on big nuclear facilities all over Russia earlier used for weapon and fundamental research, in particular:
● Research Institute Atomic Reactors (Dimitrovgrad): nuclear reactors, hot cells;
● Karpov Institute of Physical Chemistry (Obninsk branch): nuclear reactor, hot cells;
● Institute for...
Dr
Andrea Salvini
(Università di Pavia)
19/09/2011, 09:10
The Tc99m is wide used in the world for SPECT diagnostic and its importance is great. In this scenario Italy isn’t different and the lack of production for this isotope suggest to investigate other way to achieve the needs satisfaction. Starting from well known production method by activation, the Laboratory of Nuclear Energy Applied (LENA) of the University of Pavia have developed the method...
Dr
Moumita Maiti
(Saha Institute of Nuclear Physics)
19/09/2011, 09:30
The mandate of green chemistry is to search newer methods, benign to the environment and Earth, in every sphere of chemical applications. The nuclear and radioanalytical chemistry is no way exception from this mandate. In this paper we present the development of a benign method for separation of 97Ru, a potential candidate radionuclide in the field of nuclear medicine from 12C induced Y target...
Dr
Ondrej Lebeda
(Nuclear Physics Institute AS CR, p.r.i.)
19/09/2011, 09:45
Cross-section data on proton-induced reactions on natural neodymium are almost entirely missing. The data are of interest for testing predictivity of the nuclear reaction model codes, some of the activation products might have potential in nuclear medicine application, and last, but not least, rate of production of the longer-lived radionuclides is needed for estimating possible disturbing...
Amit Kumar
(Radiochemistry Division, Bhabha Atomic Research Centre)
19/09/2011, 10:00
Study of reactions involving incomplete mass transfer has been an active area of investigation in heavy ion reactions at low and medium energies. Entrance channel parameters, namely, projectile energy and entrance channel mass asymmetry are important in governing the contribution from different types of reactions involving incomplete mass transfer such as quasi-elastic transfer, massive...
Suparna Sodaye
(Bhabha Atomic Research Centre)
19/09/2011, 10:15
Fission of heavier actinides and trans-actinides through heavy ion reactions is currently an active area of study to investigate contribution from non compound nucleus fission. In addition, there is a contribution from transfer induced fission. In the present work, mass distributions of the fission products produced in 20Ne + 232Th have been measured at Elab=115 and 145 MeV. Self supporting...
Dr
Olga Feynberg
(NRC "Kurchatov Institute"), Prof.
Victor Ignatiev
(NRC "Kurchatov Institute")
19/09/2011, 11:00
Last decade, systems with liquid fuel on the base of molten salts attracted attention as potential dedicated burners of transuranium (TRU) elements from LWR spent fuel. Kurchatov Institute with partners contributed to Molten Salt Reactor (MSR) development within ISTC#1606 and #3749 tasks. Within these projects key technical solutions for development of promising TRU transmuter concepts were...
Mr
Dag Eriksen
(Primus.inter.pares AS, Norway)
19/09/2011, 11:20
Nuclear technology utilizes several stable nuclides, but not necessarily as isotopically pure materials. One example is boron, where B-10, abundance 19.9%, has a high thermal neutron absorption cross section utilized in neutron detectors, but natural boron is used despite the fact that the 80.1% abundant B-11 is not contributing. In Generation IV-reactor concepts fuels sustaining high...
Dr
K. R. Kim
(Korea Atomic Energy Research Institute)
19/09/2011, 11:35
Metal electrowinning is the process of winning metal ions from an electrolyte to a solid form on a cathode by passing an electric current through the electrolyte. In the uranium electrowinning literature, only a limited number of multiphysics modeling studies have been taken place for the comprehensive understanding of the complexity in this process. A computational electrochemo-fluid dynamics...
Ms
Julia Bisson
(CEA-Marcoule, France)
19/09/2011, 11:50
In the context of nuclear fuel reprocessing and in order to reduce the nuclear waste radiotoxicity, new ways to selectively extract actinides from spent fuels are studied. Among them the GANEX process (for Group ActiNides Extraction) is based on a homogenous recycling of actinides. All actinides (U(VI), Np(V et VI), Pu(IV), Am(III), Cm(III)), present in a highly acidic aqueous solution, would...
Dr
Yury Pokhitonov
(Khlopin Radium Institute)
19/09/2011, 12:05
One of the most important conditions for the realization of the concept of closed nuclear fuel cycle consists in the availability of highly developed infrastructure, including reprocessing of spent nuclear fuel (SNF), and further utilization of the resulted waste. The major way for increasing the safety of radwastes management is the development of advanced technologies, which would enable to...
Dr
Mikhail Alyapyshev
(Khlopin Radium Institute)
19/09/2011, 12:20
The treatment of the high level waste generated during nuclear fuel reprocessing is the obligatory stage of the nuclear fuel cycle. The reducing of volume of nuclear wastes could be realized by recovering of all harmful radionuclides (actinides, lanthanides and fission products) to separate fractions and their encapsulating in appropriate stable matrices. Separation of minor actinides (Am and...
Dr
Dmitry Kirsanov
(StPetersburg University), Dr
Vasiliy Babain
(Khlopin Radium Institute)
19/09/2011, 12:35
PUREX process of spent nuclear fuel (SNF) reprocessing requires thorough analytical monitoring at every technological stage to minimize economical losses and ecological risks. Spectrophotometric determination of various ions in visible and near UV spectral range is a classical analytical method. It can be successfully employed for determination of various oxidation states of actinides in...
Mr
Paresh Prajapati
(The M. S. University of Baroda, Vadodara, India-390002)
19/09/2011, 12:50
232Th-233U fuel cycle in connection with ADSS is one of the possibilities for power generation besides transmutation of long-lived fission products and incineration of long-lived minor actinides. The 232Th-233U fuel in AHWR and ADSS has an advantage over the present reactors based on uranium fuel from the point of thousand times less radio toxic wastes production. Besides these, thorium in the...
Susanta Lahiri
(Saha Institute of Nuclear Physics)
19/09/2011, 14:50
Nowadays molybdenum nanoparticle is highly demanding in industry. Molybdenum trioxide (MoO3), as a wide band gap n-type semiconductor, is one of the most intriguing transition metal oxides.
There are various kinds of techniques for synthesis of molybdenum trioxide nanoparticle e.g. chemical route, sol-gel chemistry method, vapor deposition, electro-deposition, flash evaporation, ultrasonic...
Dr
Stanislav Pavelka
(Institute of Physiology, ASCR, Prague/Central-European Technology Institute, Masaryk University, Brno, Czech Republic)
19/09/2011, 15:10
With the aid of several radioanalytical methods, we studied the effects of an enhanced bromide and/or perchlorate intake on various aspects of iodine metabolism and, consequently, on the metabolism of thyroid hormones in the rat. Presumed goitrogenic and thyrotoxic effects of excessive bromide and perchlorate ions were followed in adult male rats, as well as in lactating rat dams (and their...
Prof.
Filippo Terrasi
(2nd University of Naples)
19/09/2011, 16:00
Long lived anthropogenic alpha-emitting radionuclides have been, and stiil are, released in the environment by nuclear weapon tests, nuclear accidents, fuel reprocessing operations and nuclear power plants decommissioning. Among these the most significant are 239,240Pu and 236U. Quantification of releases and tracking their dispersion in the environment has traditionally been the task of alpha...
Dr
Roberto Catalano
(Dipartimento di Fisica e Astronomia -Università degli studi di Catania,INFN sezione di Catania)
19/09/2011, 16:20
Tritium exists rather uniformly in the environment as a result of both natural production by cosmic-ray interaction with the upper layers of the atmosphere and residual fallout from nuclear weapons tests carried out from 1952 till 1980. Naturally occurring tritium mainly reaches the Earth’s surface in the form of precipitation, becoming part of the hydrological cycle. Nowadays, the possibility...
Gabriele Wallner
(University of Vienna)
19/09/2011, 16:35
Determination of the isotopic ratio 236U/238U in environmental samples
M. Srncik1, P.Steier2, R. Eigl1, G. Wallner1
1 Department of Inorganic Chemistry, University of Vienna, Währingerstr. 42,
A-1090 Vienna, Austria
2 Faculty of Physics – Isotope Research, University of Vienna, Währingerstr. 17,
A-1090 Vienna, Austria
236U with a half-life of 2.3∙107 years is produced via...
Mrs
Ewa Tomankiewicz
(Institute of Nuclear Physics, PAS, Radzikowskiego 152,31-342 Kraków, Poland)
19/09/2011, 17:30
This poster presents results of application of a sequential radiochemical procedure for multi-elemental analyses for samples human bones obtained from joint replacement surgery.
The grounded ashes of bones were dissolved in 6mol/L HCl. Samples were left for two days until bubbles disappeared. The tracers, i.e. 242Pu, 243Am and 85Sr, were added using an automatic pipette and analytical...
Mr
Jie Du
(China Academy of Engineering and Physics), Mr
Zhi Zhang
(China Academy of Engineering and Physics)
19/09/2011, 17:30
Palladium powders had been aged at room temperature for 6.6 years. The 3He content was estimated from the initial tritium stoichiometry and the aging time by applying the radioactive decay law, which shows the helium-palladium atomic ratio (He/Pd) is 0.204. Tritium absorption of aged palladium powder has been measured in the initial pressure of 284 kPa and as a comparation, fresh palladium...
Dr
Aude Bombard
(TrisKem International - FRANCE)
19/09/2011, 17:30
The monitoring of long-lived radionuclides is of great importance for the surveillance of nuclear facilities such as power plants, waste repositories and reprocessing plants, during their operation as well as during their decommissioning. This is especially true for radionuclides of rather volatile elements such as chlorine and iodine, main interest being in Cl-36 and I-129. Measurement...
Kumar Niranjan
(North-Eastern HilL University Shillong Meghalaya)
19/09/2011, 17:30
A radiation dose and risk assessment exercise was carried out for the edible biota, Garra lamta, Brassica compestris var. dichotoma, Oryza sativa var.Shalum1 and Zea mays due to the naturally available radionuclide 40K, 238U and 232Th in Domiasiat ecosystem of Meghalaya, India. A detailed morph-physiological study of biota and the eco-geo-physiographical study of ecosystem had been carried out...
Prof.
Elisabete De Nadai Fernandes
(University of Sao Paulo)
19/09/2011, 17:30
Contamination of soil due to human activities has become a serious concern to both environment and public health. The Piracicaba city, in the state of São Paulo, Brazil, is a highly industrialized area with a large concentration of steel industries. The fumes, liquid and solid waste generated by these industries may contain chemical elements that cause environmental and health problems. In the...
Prof.
Juan F Facetti-Masulli
(Universidad Nacional de Asunción)
19/09/2011, 17:30
Plutonic and volcanic rocks were analyzed by INAA in their major components for its classification. The samples proceed from the sites/regions corresponding to the Precambrian to Paleozoic/Postpaleozoic magmatism in the Eastern and Western Paraguay. In the Eastern Region the Precambrian is present in two structural hights: the Apa Hight in the north and Caapucu in the south.The latter is...
Jan Kameník
(Nuclear Physics Institute ASCR)
19/09/2011, 17:30
Formation of moldavites (tektites from Central Europe) was connected with a large meteorite impact to Ries region in western Bavaria in Germany 14.5 million years ago. The parent materials for moldavites have usually been assigned to the uppermost layer of pre-impact sediments and sedimentary rocks dated to Middle Miocene. According to several geochemical indicators, ash from biomass burned at...
Mr
Vitaly Vidanov
(Open Joint Stock Company “Academician A.A. Bochvar High-Tech Research Institute of Inorganic Materials”)
19/09/2011, 17:30
Uranium purification from technetium in the process of spent nuclear fuel reprocessing is one of the most complex problems.
Uranium reclaim for separating plant is to be extremely decontaminated from Tc because of the problems at the sublimation stage caused by volatile TcF6 formation during uranium recycling process.
There is a conflict between Thorp plant requirements for uranium product...
Dr
Alanis José
(Nuclear Center of México)
19/09/2011, 17:30
In the Plant of Radioisótopes Production of the Nuclear Center of México (ININ) of Mexico, they are prepared weekly radiofármacos, the Yodohipurato of sodium and the Meta-yodobencilguanidina. These compounds are so called molecules marked with iodine (131I). Nowadays the processes radioquímicos that are used for the preparation of these compounds are carried out of individual and manual form,...
Dr
Celine Gautier
(CEA Saclay DEN/DANS/DPC/SECR/LANIE)
19/09/2011, 17:30
The LANIE (Elemental, Isotopic and Nuclear Analysis Laboratory) develops and implements a set of radiochemical protocols associated with radiological and elemental measurement techniques devoted to the characterization of Long Lived Radionuclides in Low and Intermediate Level Nuclear Wastes.
121mSn and 126Sn are two radionuclides of interest for the performance assessment of waste storage...
Prof.
Juan Lartigue
(National University of Mexico)
19/09/2011, 17:30
A project to develop a residential building in a previous industrial plot, in the urban zone of Mexico City, has required the application of the local Norm regarding the maximum permitted limits of heavy metals in soils. Though the Norm prescribes the Atomic Absorption method for the heavy metals determination, the Energy Dispersive X-Ray Fluorescence method was proposed for a quick and...
Dr
Maria do Carmo Freitas
(URSN-ITN, Instituto Tecnológico e Nuclear)
19/09/2011, 17:30
Cereals are the most significant agricultural crops not only by the sheer magnitude of their gross-tonnage production and prevalence in human diets worldwide, but also as food vehicles of important items for human nutrition and wellness at large -- proteins, dietary fibres and oligoelements, such as selenium, calcium, zinc and iron, to name just a few. Still, some micronutrients feature an...
Dr
Maria Bubenikova
(Nuclear Research Institute Rez plc.)
19/09/2011, 17:30
High liquid level waste (HLLW) issued from reprocessing of spent nuclear fuel contains dangerous nuclides, especially minor actinides (241,243Am, 245Cm, 237Np) responsible for long-term radiotoxicity of the waste. In the last decades, several HLLW partitioning processes for actinides separations based on the use of different extractants such as...
Prof.
ALEXANDRA IOANNIDOU
(Aristotle University of Thessaloniki, Physics Department, Nuclear Phys. and Elementary Partcile Phys. Division)
19/09/2011, 17:30
Radionuclides from Fukushima fallout were first detected at Milano region in a rain water sample, collected during March 27-28, with the concentrations of 131I and 137Cs isotopes in the rainwater to be equal with 0.89 Bq L-1 and 0.12 Bq L-1, respectively. During the same days a snowfall sample was collected from Monte Rosa mountain at a height of 3000 m, with the concentrations of 131I and...
Dr
Ana Maria Figueiredo
(IPEN-CNEN/SP)
19/09/2011, 17:30
The Neutron Activation Analysis Laboratory (LAN-IPEN) has been analysing geological samples for many years with INAA comparative method, for geochemical and environmental studies. This study presents the results obtained in the implementation of the k0 standardization method at LAN–IPEN, for geological samples analysis, by using the program k0-IAEA, provided by The International Atomic Energy...
Dr
Gabriella Mangano
(Dipartimeno di Fisica e Astronomia Università di Catania, CSFNSM)
19/09/2011, 17:30
In soil radon measurements are often a tool used to investigate geophysical events. The radon exhalation depends on several parameters, the most important ones are the meteorological variables (temperature, humidity, atmospheric pressure, wind velocity and rain) and soil characteristics (porosity, permeability, ..).
Areas in which fault systems insist, are characterized by specific profiles...
Prof.
Habib Latrous
(Faculté des sciences de tunis)
19/09/2011, 17:30
Abstract
We start with the idea that there is no second layer of hydration for trivalent ions La, Ac; Since it is an illogical model that first layer may contains between eight and nine molecules of water, and second layer would have a larger radius and no more than five or closes
six water molecules.
In this paper, we present a new simplistic model for estimation of trivalent actinides...
60.
Low-level gamma spectroscopy measurements of air samples in Austria after the Fukushima accident
Dr
Andreas Musilek
(Vienna University of Technology - Atominstitut)
19/09/2011, 17:30
Following the earthquake and tsunami in Japan on 11 March 2011 and the resulting damages at the nuclear power plants in Fukushima, environmental samples were taken in Austria to determine the effects in Middle Europe, about 10 000 km away from Fukushima. Of course, the radiation-level in Austria resulting from this accident is very low, but can be measured with low-level gamma spectroscopy. In...
152.
Lu-177g produced with high specific activity by deuteron irradiation for metabolic radiotherapy
Simone Manenti
(LASA, Università degli Studi di Milano and INFN-Milano)
19/09/2011, 17:30
Lu-177g is a low energy negatron emitter that, thanks to its favourable decay properties (t(1/2) = 6.734 d, negatron emission 100 %, E(β,max) = 489.3 keV, <Eβ> = 163 keV, Eγ = 208.4 keV), is one of the most promising radionuclide to be used in nuclear medicine, especially in metabolic radiotherapy of cancer of small dimensions. This RN is mainly produced in thermal nuclear reactor in two...
Ms
Jana Petrů
(ICT Prague)
19/09/2011, 17:30
The presented work examines the samples of deposits from steam generators. These samples were collected at the nuclear power plant. The deposits were studied by metallographic methods and methods of image analysis by programme NIS-Elements AR 3.0. The layers were characterized by three distinctive areas: homogeneous part (in contact with the wall tubes), porous central part and broken part...
Prof.
Helen Papaefthymiou
(University of Patras)
19/09/2011, 17:30
In this paper the 238U, 232Th, 226Ra, 40K and 137Cs activity concentrations in the marine sediments of Patras, Corinth and Amvrakikos Gulfs and Messolonghi lagoon complex, and their possible relation to geological, geochemical, biological and anthropogenic factors and processes are presented.
Patras Gulf is an open gulf with maximum depth of 160 m and due to its vicinity to Patras city...
Mr
Fabio Vitorio SUSSA
(Instituto de Pesquisas Energéticas e Nucleares - IPEN), Dr
Paulo Sergio Cardoso SILVA
(Insituto de Pesquisas Energéticas e Nucleares - IPEN)
19/09/2011, 17:30
In recent decades, there has been a great advancement in research in developing drugs from plants. Nevertheless, little information exists in literature about the activity concentration of U-238 and Th-232 decay products, even as stable elements concentration in plants used for this purpose. Peperomia pellucida, whose popular name in Brazil is little heart, is a plant known by its medicinal...
Dr
Zdeněk Řanda
(Nuclear Physics Institute ASCR)
19/09/2011, 17:30
The studied phonolites from the Lusatian Mountains in northern part of the Czech Republic are tertiary, highly evolved alkaline volcanic rocks associated with continental interplate magmatism with anomalous contents of incompatible and volatile components. From the geochemical point of view, these rocks are residue of parent magma concentrating many incompatible and volatile elements....
Dr
Eduinetty Sousa
(Instituto Oceanográfico da Universidade de São Paulo), Dr
Marilia Semmler
(Instituto de Pesquisas Energeticas e Nucleares), Dr
Marina Vasconcellos
(Instituto de Pesquisas Energeticas e Nucleares)
19/09/2011, 17:30
Estuaries and coastal zones frequently receive a great number of contaminants from anthropic sources, resulting in degradation of these ecosystems as a whole. Trace elements present in estuarine water and in marine sediments may accumulate in many invertebrate marine species as bivalve mollusks such as oysters and mussels. This study aimed to determine trace elements in Crassostrea brasiliana...
Ms
Natalya Godovanova
(Nizhni Novgorod state University)
19/09/2011, 17:30
Solubilities of uranylsilicates of general formula МIHSiUO6nH2O (MI – Li+, Na+, K+, Rb+, Cs+, NH4+) in aqueous solutions at 25С were investigated. Based on the obtained data constants of equilibrium of the dilution’s reactions of uranylsilicates in acidic and neutral solutions and standard Gibbs’s functions of formation of studied compounds were calculated, the composition of equilibrium...
Dr
José Antonio Corcho Alvarado
(Centro de Estudios Ambientales de Cienfuegos (CEAC), Cienfuegos, Cuba)
19/09/2011, 17:30
In this study we report levels of plutonium, americium and radiocesium in sediments from coastal sites of the Cuban island (Caribbean Sea), a region from where there is very limited environmental information concerning anthropogenic radioactive pollution. One sediment core from the Havana Bay (HB) and two from the Batabano Gulf (BG), both sites located in the western part of Cuba, were...
Prof.
Alejandro Ramírez
(National University of Mexico)
19/09/2011, 17:30
Measurement of radionuclides concentration in foodstuffs allows to assessing the dose being caused by its intake. It means at least one-eight of the mean annual effective dose due to natural sources. Additionally, among the trace elements in foodstuff, K is one of the most important, it is a well-known essential element and it occurs all over the earth. Three of the most customary-consumed...
Mr
ELSHAFEEA ABOWSLAMA
(Sudan Atomic Energy Commission)
19/09/2011, 17:30
This study was carried-out to leach uranium from rock phosphate using sulfuric acid in the presence of potassium chlorate as an oxidant and to investigate the relative purity of different forms of yellow cakes produced with ammonia {(NH4)2U2O7 }, magnesia (UO3.xH2O ) and sodium hydroxide (Na2U2O7) as precipitants, as well as purification of the products with TBP extraction and matching its...
Dr
Sandra Damatto
(IPEN - CNEN/SP)
19/09/2011, 17:30
The Pantanal, in the southwest part of Brazil, is one of the world’s largest freshwater wetland. This natural ecosystem has been affected due to urban contamination, irregular use of the land, tourism without control and excessive agricultural defensive utilization. In order to verify possible changes in this environment, a study was established in Pantanal da Nhecolândia, Mato Grosso do Sul,...
Mrs
Sabrina Tietze
(Chalmers University of Technology)
19/09/2011, 17:30
During severe nuclear accidents several hazardous and radiotoxic gaseous fission products can be released and constitute a threat to the environment.
Significant amounts of the radiotoxic fission product iodine, mainly as particular caesium iodide and gaseous elemental iodine, are released into the containment and coolant system assuming a core melt down accident. The distribution of iodine...
Prof.
Prof.Dr.Mr.Ashraf Elsayed Mohamed Mohamed
(Institute for Nuclear Materials)
19/09/2011, 17:30
-In the nuclear weapons sites , work on materials include non nuclear testing of components of weapons that are sitting in the sites that include fundamental physics and engineering experiments on plutonium and investigating technologies for remanufacture of plutonium parts innuclear weapons and work on prodution of spiked plutonium which incorporates more of the isotope plutonium 238 than...
Aristidis golfinopoulos
(university of patras)
19/09/2011, 17:30
Whey or milk plasma is the liquid by-product of cheese processing units. Due to its high organic load of 40-70 g/L BOD5 and 60-80 g/L COD, whey represents an important environmental problem, especially in Greece, where about 700.000 tones whey are produced annually. Additionally, whey contains significant amounts of lactose and therefore it is suitable for further treatment, in order to...
Dr
Oxana Nipruk
(Nizhni Novgorod state University)
19/09/2011, 17:30
The state of compounds of general formula Ak(BvUO6)k•nH2O (Ak - alkaline, alkaline earth, 3d-transition and rare earth elements; Bv - P, As) in aqueous solutions in the wide range of pH 0-14 was investigated. The acid-base range of existence of uranylphosphates and uranylarsenates was established, products of conversion were identified and the solubilities of these compounds were determined....
Ms
Kelly Nunes
(Instituto de Pesquisas Energéticas e Nucleares)
19/09/2011, 17:30
The Marajo Island is the largest island of the Marajo archipelago, located in the North of Brazil. With an area of approximately 50,000 km2, it is located in the Para State and east part of the Amazon. In this region, at the end of 19th century, it was identified an archaeological society named Marajora, which occupied the island from 400 to 1400 AD. It was characterized by the development of...
Ms
Anna Eremina
(Nizhni Novgorod state University)
19/09/2011, 17:30
Uranyl orthovanadate (UO2)3(VO4)2•4H2O was synthesized by heating of uranyl divanadate, (UO2)2V2O7. Structure of this compound was studied with X-ray fluorescence analysis, high temperature X-ray diffraction, scanning calorimetry, IR-spectroscopy. X-ray and IR characteristics of products of its dehydration were determined.
Synthesis has consisted of uranyl divanadate (UO2)2V2O7 heating in...
Mrs
Selen Ekim
(Ege University, Faculty of Science, Department of Chemistry, Division of Nuclear Chemistry, Bornova, Izmir 35100, Turkey)
19/09/2011, 17:30
Nowadays, 2-deoxy-2-D-glucose radiolabeled with Fluorine-18 (18FDG) is widely used in cancer imaging studies as a popular PET radiopharmaceutical. For synthesis of 18FDG, 18F radionuclide is first produced by 18O (p, n) 18F nuclear reaction in a Medical Cyclotron. For this nuclear reaction, 18O enriched water (H218O) with about 97 % enrichment level is used as a target material in the Medical...
175.
The distribution of I-131 in the fractionated dust in the ground layer of air in central Poland
Mr
Paweł Grabowski
(Technical University of Lodz)
19/09/2011, 17:30
March 11, 2011 as a result of earthquakes and tsunamis the reactor No. 1 in Fukushima Dai-ichi in Japan has been breakdown. As a consequence of failure the release of significant amounts of radionuclides such as I-131, Cs-137, Cs-134, Te-131 and the other to the atmosphere was observed. Emitted isotopes were transported with air masses even at considerable distances. The concentrations of some...
Ms
Melpomeni Prodromou
(University of Cyprus)
19/09/2011, 17:30
The formation and solubility of the Th(OH)4 solid phase has been investigated as a function of the aging time and the presence of natural organic matter (e.g. humic acid) in 0.1 M NaClO4, in the pH range between 2 and 5, and under normal atmospheric conditions. Th(OH)4 has been prepared by alkaline precipitation and characterized by TGA, ATR-FTIR, XRD, and solubility measurements. According to...
Dr
Stella Antoniou
(University of Cyprus)
19/09/2011, 17:30
The paper presents and discusses data obtained from investigations regarding the effect of natural organic matter (e.g. humic acid) on the formation and solubility of secondary solid phases of polyvalent metal ions (e.g. M(VI), M(IV), M(III)) in aqueous solutions of 0.1 M NaClO4 and under normal atmospheric conditions. The investigations were performed using hexavalent uranium as analogue for...
Prof.
Sergey Kulyukhin
(Institute of Physical Chemistry and Electrochemistry RAS)
19/09/2011, 17:30
The problem of reliable environmental protection measures in the event of severe nuclear power plant accidents appears to be an important factor restraining the development of nuclear energy. It is known that a hypothetic severe accident accompanied by a partial or complete destruction of the reactor’s active zone, bring about the formation of large quantities of gaseous products. This leads...
Prof.
Sergey Kulyukhin
(Institute of Physical Chemistry and Electrochemistry RAS)
19/09/2011, 17:30
The localization of volatile radioactive iodine compounds by various sorbents from vapor-gas media is a vital issue for environmental protection during both irradiated nuclear fuel reprocessing and accidents at nuclear power enterprises, including nuclear power plants (NPPs).
The work studies the thermal decomposition of methyl iodide CH3131I, a volatile radioactive iodine organic compound,...
Dr
Jiří Mizera
(Nuclear Physics Institute ASCR)
19/09/2011, 17:30
Formation of the Central European tektites - moldavites - has unequivocally been associated with a large meteorite impact to Ries region in western Bavaria in Germany 14.5 million years ago. However, after several decades of investigation, unambiguous assigning all source materials of moldavites and processes of their chemical differentiation still remains open. Despite some similarity of...
Ms
Camila Elias
(University of São Paulo / Center of Nuclear Energy in Agriculture / Radioisotopes Laboratory)
19/09/2011, 17:30
Commercial dog food is supposed to be a complete and balanced diet, formulated by mixing several ingredients, aiming at being the exclusive source of all nutrients for a healthy life of dogs. However, for reducing costs, low quality ingredients are often used in the composition of dog food, including byproducts from meat and grain processing and byproducts from other food industries, as well...
Prof.
ALEXANDRA IOANNIDOU
(ARISTOTLE UNIVERSITY OF THESSALONIKI, Physics Department, Nuclear Phys. & Elementary Particle Phys. Division)
19/09/2011, 17:30
The activity concentrations of 238U and 234U have been determined in groundwater samples of hot springs and deep wells in Northern Greece. The analysis was performed by alpha spectroscopy after pre-concentration and separation of uranium by cation exchange (Chelex 100 resin) and finally its electro-deposition on stainless steel discs. The uranium concentration in deep wells and springs varies...
Prof.
Suresh Aggarwal
(Homi Bhabha National Institute (HBNI))
20/09/2011, 08:30
Prof.
Igor Villa
(Institut für Geologie, Universität Bern, CH-3012 Bern, Switzerland; Dipartimento di Scienze Geologiche e Geotecnologie, Università di Milano Bicocca, I-20126 Milano, Italy)
20/09/2011, 08:50
The IUPAC-IUGS joint Task Group “Isotopes in Gesciences”, TGIG, has evaluated the published measurement results for decay constants (i.e. half-lives) of U-235 and U-234 relative to that of U-238.
A measurement result is generally expressed (VIM, 2008, entry 2.9) as a single measured quantity value and a measurement uncertainty. A significant part of the present evaluation was the assessment...
Dr
Borut Smodiš
(Jožef Stefan Institute)
20/09/2011, 09:10
Uranium mine at Žirovski vrh, Slovenia, operated from 1985 to 1990 and processed about 600,000 tons of uranium ore. The uranium mill tailings (UMT) were deposited onto the Boršt waste pile lying close to the mine, in the subalpine region with relatively high rainfall and within a relatively densely populated area.
The mining influential area has been under continuous radiological monitoring...
Mr
Paweł Grabowski
(Technical University of Lodz, Department of Chemistry, Institute of Applied Radiation Chemistry)
20/09/2011, 09:25
The uranium chain radionuclides are usually used for a wide range of application in the Earth Sciences. The 234U/238U activity ratio is used as a geochemical tool to investigate transport and flow relationships in major hydrological reservoirs, groundwater pattern and it is highly useful for interpreting timescales of weathering. In rocks older than a few million years, 234U/238U activity...
Dr
Ivanka Lovrencic Mikelic
(Rudjer Boskovic Institute)
20/09/2011, 09:40
Distribution of U-238 in sediments of the Kastela Bay near the city of Split (Croatia) to a depth of 50 cm was studied due to an assumed discharge of the TENORM (Technologically Enhanced Naturally Occurring Radioactive Material) in the Bay. Sediment cores, comprising 604 samples, were taken on 95 stations and sliced into eight segments. U-238 massic activities were measured by...
Prof.
Tobias Reich
(Johannes Gutenberg-Universität Mainz)
20/09/2011, 09:55
Plutonium will be a major contributor to the radiotoxicity of spent nuclear fuel after storage times of more than 1,000 years due to the long half-lives of Pu-239 and Pu-240. Several European countries are considering argillaceous rocks as potential host rock formation for high-level nuclear waste repositories. Plutonium has a very rich and complex chemistry in aqueous solution, where up to...
Dr
Paolo Finocchiaro
(INFN)
20/09/2011, 10:10
A prototype array of modular sensors for online monitoring of radioactive waste was developed at INFN-LNS.
With the main purpose of counting gamma radiation, we implemented a new kind of mini-sensor, based on Silicon PhotoMultipliers and scintillating fibres, that behaves like a cheap scintillating Geiger-Muller counter. It can be replicated, for instance, in shape of a fine grid around each...
Kumar Niranjan
(North-Eastern HilL University Shillong Meghalaya)
20/09/2011, 10:25
Radiation risk assessment in the radio ecological world is a crucial and complex process. The uncertainty associated with this need to be sort out. A closed system of natural forest of 5 kms at the baseline level is taken into account. The varying radiation level was observed and the generic machine data were simulated and the detail scenario characterization has been conducted using ten...
Prof.
Giuseppina Immè
(Dipartimento di Fisica e Astronomia- Università di Catania, INFN Sezione di Catania)
20/09/2011, 11:20
Many people associate the environmental radioactivity with the artificial radioactivity. The population knows few things about the natural radioactivity. From 2005 in the framework of both “Lauree Scientifiche” project (PLS), funded by Italian Education Minister, and a project sponsored by the National Institute of Nuclear Physics (INFN), scientific dissemination was promoted in the field of...
Mrs
Gülcan Ünak
(Ege University, Faculty of Science, Department of Biochemistry)
20/09/2011, 12:15
2-Fluoro-2-deoxy-D-glucose radiolabeled with Fluorine-18 (18F-FDG) is routinely used in nuclear medicine as a PET imaging radiopharmaceutical and nucleophilicly synthesised, in general, using mannose triflate as a precursor in the presence of Kryptofix 222TM as a catalyst in acetonitrile as a polar aprotic solvent, which involves the SN2 nucleophilic substitution reaction of 18F to 2-position...
Dr
Stanislav Pavelka
(1Department of Radiometry, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague and 2Central-European Technology Institute, Masaryk University, Brno, Czech Republic)
20/09/2011, 12:30
Using [I-125]-labeled iodothyronines as substrates, we applied our newly developed radiometric enzyme assays for iodothyronine deiodinases (IDs) of types 1, 2 and 3 (D1, D2 and D3), as well as the adapted radiometric assays for conjugating enzymes uridine 5’-diphospho-glucuronyltransferase (UDP-GT) and iodothyronine sulfotransferases (ST), in radiopharmacological studies of the interaction of...
Prof.
Ignazio Renato Bellobono
(LASA, Department of Physics, University of Milan, and B.I.T. srl, Milan, Italy)
20/09/2011, 18:30
In the first part of the presentation, some epistemological thoughts related to the connection between CHEMISTRY and RADIOCHEMISTRY are introduced.
About 40 years before the birth of RADIOCHEMISTRY, a great debate was taking course in CHEMISTRY, concerning the essence itself of this new-born science, from the question of atomic and molecular weights to periodical properties of the elements...
Constantin Papastefanou
(Aristotle University of Thessaloniki, Department of Physics, Atomic and Nuclear Physics Laboratory)
21/09/2011, 08:30
The aerodynamic size distributions of radon decay product aerosols, i.e. 214Pb, 212Pb, and 210Pb were measured using low-pressure (LPI) as well as conventional low-volume 1-ACFM and high-volume (HVI) cascade impactors. The activity size distribution of 214Pb and 212Pb was largely associated with submicron aerosols in the accumulation mode (0.08 to 2.0 μm). The activity median aerodynamic...
Dr
Manuel Navarrete
(National University of Mexico)
21/09/2011, 08:50
During a time period little longer than 60 years, it has been created a radioactive pollution background over the natural one, which started in 1945 and it has been growing up since then, due to several nuclear tests, minor nuclear reactors failure and four major accidents: Wind Scale, Three Mile Island, Chernobyl and Fukushima. This radioactive polluting background can be easily detected...
Dr
Shun Sekimoto
(Kyoto University Research Reactor Institute (KURRI))
21/09/2011, 09:10
High-energy proton beams traveling in air and beam sprays from the interaction of the beam with the target and related target station components produce radioactive aerosols in the target area. We report on the measurements of the radioactive aerosols produced in the Fermilab Anti-proton target station (AP0), where 120-GeV proton beam interacts with an Inconel target. Radioactive aerosols are...
Mr
Zhi Zhang
(China Academy of Engineering Physics)
21/09/2011, 09:25
In order to measure the helium release accurately, many methods including thermal desorption, P-V-T, mass spectrometric analyses and calorimetric measurements have been used. The article provides competitive measure methods of D-T isotope exchange, thermal desorption and aqua fortis dissolution to study helium release from PdTx. The methods of D-T isotope exchange and aqua fortis dissolution...
Dr
Marina B. Agostini Vasconcellos
(IPEN - CNEN/SP)
21/09/2011, 09:40
Studies on the coast of São Paulo identified contamination in water and sediment samples in the region of Santos, and bioaccumulation of contaminants in marine organisms. Based on these studies, there was a need to assess exposure and effects of trace elements in a sentinel organism in this region, by using the bivalve Perna perna. The mussels were evaluated for bioaccumulation of As, Co, Cr,...
Trinidad Martinez
(National University of Mexico)
21/09/2011, 09:55
The validity of a specific method should be demonstrated in laboratory experiments using samples or standards that are similar to unknown samples analyzed routinely. Aim of this work is the validation of γ the spectrometry technique to determine potassium in foodstuffs. It was evaluated the accuracy spiking a blank of calcium carbonate sigma ultra purity (potassium concentration lesser than...
Dr
Manuel Navarrete
(Faculty of Chemistry, National University of Mexico)
21/09/2011, 10:10
It is very well known from ancient times that fulvic acids present in Nature as a component of dead leaves and vegetables, are the active principle which promotes better crops , acting on mineral ions in soils by picking up them into plants tissues at higher concentrations. Tested in mice, by using radioactive labeled ions such as 32PO4---, 45Ca++, 59Fe+++ and 131I-, fulvic acids have...
Prof.
Pavel Povinec
(Comenius University of Bratislava)
21/09/2011, 11:00
The recent developments in ultra low-level radionuclide analyses include in the radiometrics sector availability of large volume HPGe detectors operating in underground laboratories very often with additional anti-cosmic shielding. In the mass spectrometry sector they include applications of Accelerator Mass Spectrometry (AMS), Inductively Coupled Plasma Mass Spectrometry (ICPMS) and Resonance...
Dr
Maria do Carmo Freitas
(Instituto Tecnológico e Nuclear)
21/09/2011, 11:20
The main objective of this study is the elemental characterization of geomaterial samples (“soils”, rañas and mother rocks), in terms of rare earth elements (REE), collected between 2007 and 2008, in the Morais Massif, (NE Mainland of Portugal) by using Instrumental Neutron Activation Analysis (INAA). The group of samples labeled “soil”, includes representative portions of the inorganic...
Paulo Ferreira
(University of São Paulo)
21/09/2011, 11:35
Cs-137 is among the main isotopes produced in U-235 fission in nuclear explosions. It has a high fission yield, half-life of 30.17 years and decays to Ba-137 through β and γ emissions. As Cs-137 has a strong affinity to marine particulate matter, it tends to accumulate in sediments.
This nuclide is largely used for estimating sedimentation rates, since historical dates of Cs-137 liberation in...
Prof.
ALEXANDRA IOANNIDOU
(ARISTOTLE UNIVERSITY OF THESSALONIKI, Physics Department, Nuclear Phys. and Elementary Particle Phys. Division)
21/09/2011, 11:50
The activity size distributions of the natural radionuclide tracer 7Be were determined in different site places in Northern Italy in order to define any differences due to the different environments. In the frame of this work, three different environments where chosen, in an urban area (University of Milano), in a rural residential area (Ispra) and in Maqugnaga village at 1300 m height in...
Prof.
Trinidad Martinez
(National University of Mexico)
21/09/2011, 12:05
Marine sediments from West coast of Mexico in the Pacific Sea from Sinaloa to Jalisco, Mexico were analyzed by the energy-dispersive X-ray fluorescence technique (EDXRF). 9 sediment samples were collected in May, 2010 at water depths between 55.5 and 1264 m with a box nucleate sampler type Reinneck. Sediments were dried and the total and separated fine fraction analyzed. Concentration and...
Prof.
Alexander Bolsunovsky
(Institute of Biophysics SB Russian Academy of Sciences)
21/09/2011, 12:20
The Yenisei River is contaminated with artificial radionuclides released by one of the Russian nuclear facilities (Mining-and-Chemical Combine), which has been producing weapons-grade plutonium since 1958. The submerged plants growing on radioactively contaminated river bottom sediments contain artificial radionuclides. Sequential extraction techniques are the most common method of studying...
Dr
Szabina Torok
(KFKI Atomic Energy Research Institute)
21/09/2011, 12:35
Argillaceous rocks are being considered in many radioactive waste management programmes as suitable host rock formations for the deep geological disposal of radioactive waste. Clay minerals such as illite, smectite, illite/smectite mixed layers and kaolinite are important components in such rock types and can often make up 50 or more wt.% of the total mass. One of the most important...
Mr
Kamil Brudecki
(The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences,)
21/09/2011, 12:50
As a result of strong earthquake near Japan Islands followed by tsunami wave on 11 of March 2011 a serious damage caused by overheating occurred to reactors of the Fukushima Daiichi Nuclear Power Plant. Uncontrolled radioactive emission to the atmosphere started on 12 of March and was lasting for more than 2 weeks. Radioactive cloud migrated across Pacific, Northern America and came to Europe...
Dr
Sergey Gordeev
(Scientific and Industrial Association "Radon")
21/09/2011, 13:05
As a result of the accident at the “Fukushima” nuclear power plant, caused by an earthquake, there were releases of radioactive substances into the environment.
To date, many countries reported on the flow of radioactive aerosols from Japan and the radioactive contamination of the environment, as well as food (1,2,3,4).
Intake of radioactive aerosols in Moscow was registered at radiation...
Dr
Frans De Corte
((em.) UGent and FWO-VL, Neerstraat 20, B-9921 Vinderhoute, Belgium)
22/09/2011, 08:30
In the development of k0-standardized neutron activation analysis (k0-NAA), a number of criteria were identified and worked out both theoretically and practically, that should be taken into account for achieving reliable analysis results. Among these, the ones most frequently considered and reported upon in publications dealing with the implementation and the application of k0-NAA are: i) the...
Dr
Richard Lindstrom
(National Institute of Standards and Technology)
22/09/2011, 08:50
Accurate nuclear measurements depend on well-controlled experimental and numerical work, both in the execution of daily measurements and in the creation and evaluation of fundamental constants needed to connect the laboratory with the International System of Units. It cannot always be assumed that tabulated data are sufficiently accurate for all routine work. The k0 Nuclear Data Committee has...
Prof.
Sergey Kulyukhin
(Institute of Physical Chemistry and Electrochemistry RAS)
22/09/2011, 09:10
It is known that the activity of radioactive iodine in the water coolant increases dramatically during the shutdown of reactors on the Russian working WWER- or RBMK-type NPPs. For example, the radioactivity of 131I in the water coolant increased 30 to 200 times during the shutdown of the reactor on the RBMK-type NPP such as the Leningrad and Smolensk NPPs. One of the reasons of this activity...
Prof.
Prof.Dr.Mr.Ashraf Elsayed Mohamed Mohamed
(Institute for Nuclear Materials)
22/09/2011, 09:25
- Egyptian Nuclear weapons states have developed dedicated safe and secure facilities for nuclear warhead and bombs assembly and disassembly operations .These facilities are critical elements of material nuclear weapons infrastructures .Their broad operational responsibilities include the production of new warheads, the dismantlement of retired warheads ,warhead modernization and...
Dr
Yoshihiro Kitatsuji
(Japan Atomic Energy Agency)
22/09/2011, 09:40
Some actinide ions such as U, Np and Pu exist stably as trivalent to hexavalent ions in an acidic solution. The adjustment of the oxidation state of these ions to a desired one is inevitable for the efficient chemical separation or the precise determination of them, since chemical reactions such as liquid-liquid distribution and complex formation with ligands depend strongly on the oxidation...
Dr
Oussama Alhassanieh
(Atomic Energy Commission of Syria AECS)
22/09/2011, 09:55
The behavior of thorium on poly(vinyl pyrrolidone) grafted with citric acid in HCl-media has been investigated using -spectrometry. Various factors has been studied such as: treatment of PVP, concentration of grafted acid, concentration of HCl, concentration of thorium, and contact time. The results have shown that thorium is adsorbed on the resins in high acid concentration (5-7 mol/l HCl)...
Dr
Neeta Lala
(Universiti Malaysia Pahang)
22/09/2011, 10:10
Abstract
The chemiluminescence (CL) emission spectra of luminol in aqueous sodium hydroxide [Na(OH)2] system has been recorded in presence of hemin using various oxidants. Hydrogen peroxide, potassium ferricyanide, potassium permangnate, and potassium persulphate are the various oxidants used. There is no emission of light observed when potassium persulphate has been used as an oxidant. The...
Prof.
Xiaolin Hou
(Risø National Laboratory for Sustainable Energy, Technical University of Denmark)
22/09/2011, 11:00
With the increasing threat of potential nuclear terrorism and radiological accidents, establishment of a rapid reaction system under nuclear emergency preparedness is an urgent requirement for reducing the health risk to the public. Rapid determination of radionuclides in large number of biological and environmental samples is a key and crucial step in the emergency process and determines the...
Prof.
Dominic Lariviere
(Université Laval)
22/09/2011, 11:20
Many radioisotopes are released in the environment from our use of the nuclear energy. Among these, actinides are a health concern due to their long environmental persistence and the risk associated with internal dosimetry. The simultaneous analysis of actinides (i.e. Th, U, Np, Pu and Am) is labour-intensive because 1) they are found at ultra trace levels, 2) are difficult to dissolve, 3)...
Dr
Yutaka MIYAMOTO
(JAEA (Japan Atomic Energy Agency))
22/09/2011, 11:35
Abundance and isotopic ratios of trace uranium (U), thorium (Th), lead (Pb) and lanthanides in environmental samples play a key role to investigate features of the samples. The analytical data may give information on origin of the sample, dating of mineral formation, history on mineralization, and age determination of nuclear materials. Abundance and isotopic ratios of an element of interest...
Mr
Nils Stoebener
(University of Mainz - Institute of Nuclear Chemistry)
22/09/2011, 11:50
Long-lived isotopes of the actinides are the major contributors to the radiotoxicity of spent nuclear fuel after a storage time of 1000 years. Especially Np-237 is considered as a potential hazard to the environment because of its long half-life of 2.14 million years and high mobility in aquatic systems. Since the concentration of Np-237 expected in case of a leakage of a nuclear waste...
Wouter Schroeyers
(CMK (UHasselt) and NuTeC (XIOS Hogeschool Limburg))
22/09/2011, 12:20
Background: Recently the European Commission is recasting the Euratom Basic Safety Standards (BSS) in order to further limit the exposure of the public and workers to radioactivity. The new BSS is expected in 2015 and contains a broad list of industries, processing Naturally Occurring Radioactive Material (NORM), that will become subject to more strict regulation. The list contains, among...
Suresh C. Srivastava
(Medical Department, Brookhaven National Laboratory, Upton, New York 11973, U.S.A.)
22/09/2011, 16:30
This presentation will introduce a relatively novel paradigm that involves specific individual radionuclides or radionuclide pairs that have emissions that allow pre-therapy low-dose imaging plus higher-dose therapy in the same patient. We have made an attempt to sort out and organize a number of such theragnostic radionuclides and radionuclide pairs that may potentially bring us closer to the...
Prof.
Aleksander Bilewicz
(Institute of Nuclear Chemistry and Technology)
22/09/2011, 16:50
Objectives: Two isotopes of scandium, 47Sc and 44Sc, are perspective radionuclides respectively for radiotherapy and diagnostic imaging. 47Sc decays with the half-life of 3.35 days and maximum β- energy of 600 keV. It also emits low-energy γ-radiation (Eγ = 159 keV) suitable for simultaneous imaging. The other scandium radionuclide, 44Sc (t1/2 = 3.92h) is an ideal β+-emitter in PET diagnosis....
Prof.
Alessandro Dolmella
(University of Padova, Italy)
22/09/2011, 17:05
99mTc(N)-DBODC(5) is a lipophilic cationic mixed-compound currently under clinical investigation as potential myocardial imaging agent. The findings that this complex accumulates in mitochondrial structures through a mechanism mediated by the negative mitochondrial membrane potential, and that the rapid efflux of 99mTc(N)-DBODC(5) from non-target tissues seems correlated to the Pgp/MDR-Pgp...
Prof.
Alessandro Dolmella
(University of Padova)
22/09/2011, 17:30
An efficient procedure for the preparation of [188Re(N)(PNP)]-based complexes is reported. The radiochemical yield (RCY) of the compounds was optimized considering reaction parameters such as: nature of nitrido nitrogen donors, reaction times and pH.
The chemical identity of 188Re-agents was established by HPLC comparison with the corresponding well characterized cold Re-compounds. The...
164.
A new radiofluorination method of select fluor as a new and effective F-18 fluorinating reagent
Mrs
Gülcan Ünak
(Ege University, Faculty of Science, Department of Biochemistry, Bornova, Izmir 35100, Turkey)
22/09/2011, 17:30
1-(Chloromethyl)-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane ditetrafluoroborate is known as SelectfluorTM (Sigma-Aldrich Cas no. 140681-55-6) and is a widely used as an electrophilic fluorinating agent for different kinds of organic compounds. Contrarily, it was not used for 18F fluorination processes, but recently a research team at Oxford University in the UK has tried to label...
Ms
Izabela Cydzik
(Joint Research Centre European Commission, IHCP)
22/09/2011, 17:30
Nanoparticles (NPs) have been used in a variety of applications for many decades, without specific attention being given to safety issues that may be due to their small dimensions. Examples of products in which NPs are used are suncreams, printer toners, car tyres, and pigments. In recent years, the rapid growth of the field of nanotechnology has seen surge in the number of different types of...
Dr
Cemal OZEROGLU
(Istanbul University Faculty of Engineering Department of Chemistry 34320 Avcilar-Istanbul/TURKEY)
22/09/2011, 17:30
Toxic or radioactive metals cause progressive or irreversible renal injury and in acute cases, may lead to kidney failure and dead (1-3). Nuclear technologies have provided a better quality of different fields of life. However, this leads to accumulation of substantial amounts of radioactive wastes or waste solutions and the radionuclide 137Cs is produced in high yield during the fission...
Mrs
Tasoula Kiliari
(University of Cyprus)
22/09/2011, 17:30
Tasoula Kiliari, Ioannis Pashalidis*
Department of Chemistry, University of Cyprus, P.O. Box 20537, Cy-1678 Nicosia
*E-mail: pspasch@ucy.ac.cy
ABSTRACT
The concentration of trivalent americium and samarium in aqueous samples has been determined by means of alpha-radiometry and UV-Vis photometry, respectively, after chemical separation and pre-concentration of the elements by...
Prof.
Pavol Rajec
(BIONT, Comenius University)
22/09/2011, 17:30
The reaction route 64Ni(p,n)64Cu is very popular for the preparation of 64Cu because its entrance channel is accessible at low energies and yield of reaction is quite high. However, a high price of the enriched 64Ni is a disadvantage of this reaction path; hence, preparation of a chemically pure nickel targets for the production of 64Cu using COSTIS (Compact Solid Target Irradiation System)...
Dr
Stanislav Pavelka
(1Department of Radiometry, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague and 2Central-European Technology Institute, Masaryk University, Brno, Czech Republic)
22/09/2011, 17:30
Thyroid hormones (TH) play important roles in the development and function of both, brown and white adipose tissue. However, data about the local conversion of TH in adipocytes are still scarce. With the aid of our newly developed radiometric enzyme assay, we measured changes in the activity of the type 3 iodothyronine deiodinase (D3) in several depots of murine white adipose tissue (WAT)...
Prof.
Dominic Lariviere
(Université Laval)
22/09/2011, 17:30
Micro-wave acid dissolution is an effective and commonly used technique to dissolve environmental samples. However, this technique has several issues, including its low sample throughput, its limited ability to deal with samples containing high organic content such as biological tissues, and its incomplete digestion yields for refractory compounds like actinides oxides.
An improved...
Dr
Manuel Navarrete
(UNAM)
22/09/2011, 17:30
Mexico remains a country of vast territory; therefore, with increasing and more urgent energy demands, we consider indispensable the acceptance of Nuclear Power as a clean energy source, and thus fight back among the population the misconceptions which lead to irrational rejection as a viable alternative in the development of our country.
As background, we will point out some facts made by...
Dr
Roberta Guilizzoni
(Università degli Studi di Milano)
22/09/2011, 17:30
The continuous development of new approaches and skills in modern radiotherapy, aimed to achieve highly conformal dose volumes, have made heavy demands on dosimetry methodology development. The three-dimensional treatment planning computerized systems, adopted in the clinical praxis for radiation therapy, require dosimetry methods capable of reliable 3D dose measurements in order to ensure...
A. Bombard
(Triskem International)
22/09/2011, 17:30
Cu isotopes (e.g. Cu-64) increasingly find use in radiopharmaceutical applications; accordingly fast, reliable and easily automatable methods for the production of these isotopes are of great interest. A Cu selective extraction chromatographic resin (CU Resin, TrisKem International) developed for the fast and selective separation of Cu was characterized and a method for the separation of Cu...
Dr
Ignazio Vilardi
(Nuclear Medicine Department, Multimedica Scientific Institute, Sesto San Giovanni (MI), Italy)
22/09/2011, 17:30
Introduction
Most of the waste generated at a cyclotron/PET facility presents high radioactivity created by target irradiation. The main sources of this waste are foils, spent targets, materials produced during accelerator maintenance, chemicals used in the separation of radioisotopes from the target materials and for labelling of radiopharmaceuticals. Usually, these materials are collected...
Mr
Kamil Brudecki
(The Henryk Niewodniczański Institute of Nuclear Physics, Polish Academy of Sciences)
22/09/2011, 17:30
Plutonium isotopes are present in investigated samples mainly as a result of nuclear weapons tests in last century and Chernobyl disaster. In human body plutonium is accumulated mainly in liver and bones and main exposure pathway is inhalation. Bone tissue samples were obtained during routine surgeries – the replacement if knee or hip joints by implants. Patients belong to general population,...
Dr
Ana Maria Figueiredo
(IPEN-CNEN/SP)
22/09/2011, 17:30
The main sources of air pollution in the São Paulo megacity are gases and particulate matter released by the ever increasing fleet of light and heavy vehicles (more than 7 million) as well as industrial process emissions. These emissions are of great concern due to their effects on human health, causing lung cancer and respiratory problems, since they contain a wide range of potentially toxic...
Dr
Mitiko Saiki
(Instituto de Pesquisas Energéticas e Nucleares)
22/09/2011, 17:30
Atmospheric pollution is today one of the many problems facing mankind. This problem affects everything from the natural environment to human health and to climate. As result authorities of all over the world have become very preoccupied with the adverse effects derived from air pollution. The objective of this study was to apply Neutron activation Analysis (NAA) to collect air pollution data...
Dr
Pasquale Avino
(INAIL (ex-ISPESL))
22/09/2011, 17:30
Many studies have focused their attention on the determination of elements of toxicological and environmental interest in atmospheric particulate matter using analytical techniques requiring chemical treatments. The Instrumental Nuclear Activation Analysis (INAA) technique allows to achieve high sensitivity, good precision and excellent limit of detection without pre-treatment, also...
Claudia Landstetter
(Austrian Agency for Health and Food Safety)
22/09/2011, 17:30
A method for the determination of 90Sr and 210Pb in freshwater fish was developed. The determinations were conducted within a project on behalf of the Federal Ministry of Health. The aim of this project was to get an overview of natural radionuclides and artificial radionuclides in freshwater fish in different lakes in Austria.
For sampling the Neusiedler See in Burgenland, two lakes in...
Prof.
Grazia Gambarini
(Department of Physics, Università degli Studi, Milan, Italy and INFN Istituto Nazionale di Fisica Nucleare, Milan, Italy)
22/09/2011, 17:30
Due to the recent development of new conformal radiotherapy techniques, it’s important to generate an improvement of dosimetric instruments especially in brachytherapy, in order to obtain a remarkable improvement of the measurement accuracy and precision of the absorbed dose both by healthy and pathologic tissues.
The HDR brachytherapy requires the use of an interstitial implant or an...
Dr
Graciela Zarazua
(Instituto Nacional de Investigaciones Nucleares), Prof.
Trinidad Martinez
(UNAM. Facultad de Ciencias)
22/09/2011, 17:30
The Lerma River is born near the Toluca city. This city has an industrial, commercial and agricultural activity, the river then continues their flow to the Tepuxtepec dam which is used as a water reservoir and fish production for the local population. The concentration of heavy metals (Cr, Ni, Cu, Zn, Cd, Hg and Pb) in gills, liver, kidney and muscle of herbivorous carp (Ctenopharygodon...
Dr
Nicole Mantaut
(Università degli studi di Milano)
22/09/2011, 17:30
One of the most important progress reached in radiotherapy in the last decade is intensity modulated radiation therapy (IMRT). This modern radiotherapy permits to achieve a conformed high dose distribution around the target volume, sparing at the same time the surrounding critical organs and healthy tissues. Since the radiation fields are very complex and the absorbed doses during IMRT...
Prof.
Milan Laznicek
(Charles University, Faculty of Pharmacy, Hradec Kralove, Czech Republic)
22/09/2011, 17:30
Radiolabeled monoclonal antibodies and their fragments represent promising agents for radioimmunotherapy of cancers. For labeling with radiometals, macrocyclic chelating agents with high complex stability are usually attached to the biomacromolecule. To achieve specific activity of the antibody sufficient for a cancer treatment, large numbers of chelating groups have to be conjugated to a...
alex hermanne
(Vrije Universiteit Brussel)
22/09/2011, 17:30
With the advent of high power, high energy deuteron accelerators used for instance for the neutron source of the IFMIF facility detailed analysis of activation products in structural materials receives an increased attention (Fusion Evaluated Nuclear Data Library FENDL 3.0 ; http://www-nds.iaea.org/fendl3/).
A particular case is the formation of 7Be in light, so called low activation...
Mr
Kamol Dey
(Department of Applied Chemistry & Chemical Engineering, University of Dhaka, Bangladesh)
22/09/2011, 17:30
Life is polymeric in its essence: the most important components of living cell (proteins, carbohydrates and nucleic acids) are all polymers. Nature uses polymers both for construction and as part of the complicated cell machinery. Development of polymer is a continuous process for achieving polymer in a specific application under certain environmental condition. The bombardment of the...
Dr
Ignazio Vilardi
(Nuclear Medicine Department, Multimedica Scientific Institute, Sesto San Giovanni (MI), Italy)
22/09/2011, 17:30
Introduction
The Pharmaceutical Industry in European Community applies very strict rules for quality assurance in production and control of pharmaceuticals. A manufacturer’s authorization guarantees that all authorized pharmaceuticals satisfy the Good Manufacturing Practice (GMP) requirements for medicinal products. Many national Governments have created their own GMP guidelines. In Italy,...
Dr
Alice Laznickova
(Charles University, Faculty of Pharmacy, Hradec Kralove, Czech Republic)
22/09/2011, 17:30
Hyaluronic acid (HA) is a high molecular weight glycosaminoglycan composed of repetitive disaccharide units. HA participates in various physiological and pathological processes in the body and is typically used as a medical device, dietary supplements etc. Ubiquitous in all tissues and fluids, the fate of exogenously administered HA in the body cannot be directly determined by any classical...
Prof.
Grazia Gambarini
(Università degli Studi di Milano and INFN, Milan, Italy)
22/09/2011, 17:30
In-vivo dose measurements during complex conformal radiotherapy treatments are very important, in order to check the dose delivered to the patient and compare this dose with the prescribed one, improving in such a way the treatment quality. A method has been studied and developed aimed to perform in vivo dosimetry during brachytherapy treatments. The method is based on a radiochromic...
Dr
Simone Alessandro Grisotto
(Physics Department of the Università degli Studi, Milan, Italy)
22/09/2011, 17:30
During complex conformal radiotherapy treatments it is very important, also if not mandatory, perform in-vivo dose measurements. In fact, in-vivo dosimetry allows monitoring the dose delivered to the patient and to compare this dose with the prescribed one, improving in such a way the quality assurance. Currently, the most utilised methods for the in-vivo dosimetry are based on...
Dr
Mitiko Saiki
(IPEN/CNEN-SP)
22/09/2011, 17:30
In recent decades, anthropogenic activities, particularly those associated with industrial processes and mining, have been the major source of inorganic element enrichment in soils. Unlike organic contaminants, most inorganic elements do not undergo microbial or chemical degradation therefore their total concentrations remain in soils for a long time after their apparence. In this case, due to...
Dr
Cemal OZEROGLU
(Istanbul University Faculty of Engineering Department of Chemistry 34320 Avcilar-Istanbul/TURKEY)
22/09/2011, 17:30
Uranium and its compounds are highly toxic which causes progressive or irreversible renal injury and in acute cases may lead kidney failure and dead (1-3). For this reason, many removal processes have been used for adsorption of radioactive metal ions such as uranium(VI), strontium(II) and cesium(I) ions from industrial waste waters and waste solutions (4-6). Organic and inorganic adsorbents...
Deborah FAVARO
(Instituto de Pesquisas Energeticas e Nucleares)
22/09/2011, 17:30
The Tietê River is one of Brazil’s most important rivers and crosses the State of São Paulo (SP) from east-to-west flowing into another important river, the Paraná River. The objective of this study was to quantify the amount of trace elements and some metals present in sediments collected from the Tietê River, at 5 different sampling points (P0-P4), in 3 campaigns (2008/2009), from the...
Dr
MARIANGELA BURGOS M. de AZEVEDO
(IPEN/CNEN)
22/09/2011, 17:30
The overall objective of this work is to develop biodegradable microspheres intended for internal radiation therapy which provides an improved treatment for hepatic carcinomas [1]. The most studied brachytherapy systems employing microspheres made of holmium-biopolymer system, is composed by poly(L-lactic acid) (PLLA) and holmium acetylacetonate (HoAcAc) [2]. The importance of the holmium...
Prof.
Aleksander Bilewicz
(Institute of Nuclear Chemistry and Technology)
22/09/2011, 17:30
Objectives: The aim of the work was to study the possibility of using nanozeolites as carriers for very perspective therapeutic radionuclides -emiters 223,224,225Ra. These metals do not form stable complexes so they can hardly be bound to biomolecules via chemical bonds. Zeolites are crystalline aluminosilicates composed of tetrahedral elements that build open framework structures - a system...
Dr
Maria do Carmo Freitas
(Instituto Tecnológico e Nuclear, URSN)
22/09/2011, 17:30
At three sites of Portugal – Viana do Castelo, Sacavém, Sines – bark from Olea europea and the lichen Parmelia caperata, collected in clean areas, were exposed. The situation of the sites allows different meteorological conditions, from rainy to dry and cooler to warmer. Three different procedures for the lichen exposure were adopted: rectangular flat pieces, the lichen in its original form...
Dr
Marcia Pires de Campos
(IPEN)
22/09/2011, 17:30
Phosphogypsum is a waste of the wet-acid process for producing phosphoric acid from phosphate rock. For every ton of phosphoric acid obtained, from the reaction of phosphate rock with sulfuric acid, about four tons of phosphogypsum are produced. Large quantities of phosphogypsum have been produced worldwide. In 2006, annual production was estimated to be about 170 million tons. Brazilian...
Ms
Barbara Bartos
(Institute of Nuclear Chemistry and Technology)
22/09/2011, 17:30
Problems
Radionuclides with medium energy beta emission and a several day half-life are attractive candidates for radioimmunotherapy. Among the most promising in this category is 47Sc. The methods of production high activities of carrier free 47Sc was already described. Enriched 47TiO2 targets were irradiated with high energy neutrons (En>1 MeV) to produce 47Sc via the 47Ti(n,p)47Sc reaction....
Mrs
Gözde Sarican
(Ege University, Faculty of Science, Department of Chemistry, Division of Nuclear Chemistry, Bornova, Izmir 35100, Turkey)
22/09/2011, 17:30
Tyrosine is one of the 20 standard amino acids commonly takes place in the structures of animal proteins and it is required for normal functioning in humans and found in most proteins, for example in insulin. It is converted from the essential amino acid phenylalanin in the human metabolism and is a precursor of adrenaline, noradrenaline, dopamine, thyroid hormones, melanin, etc. In humans,...
Mrs
Cigdem Cetin
(Ege University, Faculty of Sciences, Department of Chemistry, Division of Nuclear Chemistry, Bornova, Izmir 35100, Turkey)
22/09/2011, 17:30
As is known well, insulin is a very important hormone in the body and in case of its absent or its level in the blood is low, glucose is not taken up by most body cells and the body begins to use fat as an energy source. As its level is a central metabolic control mechanism, its status is also used as a control signal to other body systems. For this reason, the sensitively measurement of...
Prof.
amran majid
(universiti kebangsaan malaysia)
22/09/2011, 17:30
Previous studies have shown that the natural radioactivity contained in the building material was significantly influenced the dose rates in dwelling. Exposure to natural radiation in building has become more important since almost 80% of our daily live are spend indoor. Thus, the aim of the study is to assess the radiological risk associated with natural radioactivity in soil based building...
Stanislav Pavelka
(1Department of Radiometry, Institute of Physiology, Academy of Sciences of the Czech Republic, Prague and 2Central-European Technology Institute, Masaryk University, Brno, Czech Republic)
22/09/2011, 17:30
Details of newly elaborated radiometric methods for extremely sensitive determination of enzyme activities of iodothyronine deiodinases (IDs) of types 1, 2 and 3 are described. IDs catalyze selective 5’- (outer ring) and 5- (inner ring) monodeiodinations of iodothyronines and play crucial roles in the biotransformations of thyroid hormones (TH).
Our novel radiometric assays for IDs are...
Dr
Barbara Paci Mazzilli
(Instituto de Pesquisas Energeticas e Nucleares)
22/09/2011, 17:30
The Brazilian phosphate fertilizers are obtained by wet reaction of the igneous phosphate rock with concentrated sulphuric acid, giving as final product phosphoric acid and dehydrated calcium sulphate (phosphogypsum - PG) as by-product. The level of impurities (metals and radionuclides, among others) present in the phosphate rock used as raw material is distributed among products and...
Mr
vimalnath nair
(Bhabha Atomic Research Centre)
22/09/2011, 17:30
64Cu is an unique radionuclide, as it undergoes transmutation through three different routes, namely, electron capture (41%), - (40%) and positron emission (19%), and hence is suitable for both PET imaging and targeted therapy. The high specific activity ‘no carrier added’ (N.C.A) grade 64Cu producible from (n,p) reactions on Zn target in medium flux nuclear reactor, is an attractive option...
Mr
Naoyuki OSADA
(Graduate school of Engineering, Kyoto University)
22/09/2011, 17:30
High-energy proton accelerator produces radiation which induces radiation-chemical reactions of the air in accelerator rooms. The radiolytic product, such as nitrogen oxide, in the accelerator room air forms a huge amount of aerosol particles. In this work, an air chamber was bombarded with a 50-MeV proton beam, and the number concentration and the size distribution of the particles formed in...
Prof.
Susanta Lahiri
(Saha Institute of Nuclear Physics)
22/09/2011, 17:30
Amongst the various radioisotopes available or becoming available for application in nuclear medicine, 61Cu offers an appropriate selection for imaging and targeted radionuclide therapy, due to its superior nuclear properties including desirable half-life and ease of production. Earlier few methods were reported for separation and extraction of 64Cu using various analytical techniques. In this...
Dr
Gyula Kis-Benedek
(International Atomic Energy Agency (IAEA))
22/09/2011, 17:30
The determination of 226Ra and 210Pb is important for characterization of new and existing reference materials, for use as natural tracers in environmental studies and in environmental assessments when natural radionuclides are present at elevated levels. The 226Ra and 210Pb ratio of characterized reference materials changes with time. Due to possible partial escape of 222Rn from the...
Deborah Favaro
(Instituto de Pesquisas Energeticas e Nucleares)
22/09/2011, 17:30
Nuclear Chemistry appears very little in high school course curricula or classes in Brazil. This fact hinders students who enroll in higher education without the knowledge necessary for it to exert its full citizenship. This study investigated the public University of São Paulo student´s of understanding of the term "nuclear energy", highlighting the structure of Social Representations (SR). ...
Dr
Nicolò Morellato
(University of Padova, Italy)
22/09/2011, 17:30
Development of new 99mTc and 186/188Re radiopharmaceuticals still remain an interesting research topic thanks to their ideal nuclear properties. 99mTc is the radioisotope of election for SPECT-imaging (Eγ=140 keV, t1/2=6.02 h), and 186/188Re are important radionuclides with therapeutic potential (186Re: Eβ=1.07 MeV, Eγ=137 keV, t1/2=90.6 h; 188Re: Eβ=2.12 MeV, Eγ=155 keV, t1/2=17 h). Despite...
Prof.
Tjaart Nicolaas (Nico) van der Walt
(Cape Peninsula University of Technology)
22/09/2011, 17:30
The production possibility of different copper radionuclides has been investigated by several groups[1-7]. Szelecsényi et al.[8] measured new cross-section data for the 66Zn(p,2pn)64Cu and 68Zn(p,x)64Cu nuclear processes from their respective threshold energies up to 100 MeV and concluded that both processes are suitable for the routine production of 64Cu. A 66Zn target and a 68Zn target can...
Dr
Vera Akiko Maihara
(IPEN-CNEN/SP)
22/09/2011, 17:30
Total Diet Studies (TDS) have been carried out to estimate dietary intakes of the essential and toxic elements for a large-scale population over a specific period of time. In general, a Market Basket (MB) approach is adopted. In this study, the TDS was based on the evaluation of food representing a MB, which reflected the dietary habits of the São Paulo State population, corresponding to 72%...
Dr
Vera Akiko Maihara
(IPEN-CNEN/SP)
22/09/2011, 17:30
Mushrooms are fungi species which have high capacity to retain elements and radionuclides such as 137Cs, 238U, 232Th, from the environment. Studies have demonstrated that wild mushrooms can be used as environmental indicators and monitors to evaluate contamination and quality of ecosystems. Several studies have determined a high level of radionuclide in agricultural products in the Poços de...
Dr
Jozef Sabol
(Czech Technical University, Faculty of Biomedical Engineering)
23/09/2011, 08:30
The paper discusses the requirements for radiation protection in nuclear chemistry which are related to the recent recommendations of the International Commission on Radiological Protection. These recommendations are currently being incorporated into the International Basic Safety Standards to be issued by the International Atomic Energy Agency later this year as well as into new relevant...
Dr
Enrico Rizzio
(eni S.p.A. Exploration & Production Division)
23/09/2011, 08:50
Naturally occurring radionuclides are present at varying concentrations in the Earth’s crust and can be concentrated by processes associated with various industrial activities, such as the ones involved in the recovery of oil and gas. This “enhanced” NORM (Naturally Occurring Radioactive Material) are also known as TENORM (Technologically Enhanced NORM) and their presence in the upstream oil...
Dr
Shun Sekimoto
(Kyoto University), Mr
Yuichi Tanimoto
(Shimizu Corporation)
23/09/2011, 09:05
Europium and cobalt etc., contained in the biological shield concrete, are made a radiation with the neutron during the nuclear power plant and the accelerator facilities in operation. At the end of operation, biological shield concrete may be considered as radioactive wastes due to these radioactive nuclides. However, it is thought europium and cobalt content in the biological shield ...
Mr
Kevin Kelleher
(Radiological Protection Instiute of Ireland)
23/09/2011, 09:20
Since the early 1980’s the Radiological Protection Instiute of Ireland (RPII) has carried out extensive monitoring of the levels of anthropogenic radioactivity in the Irish marine environment through analysis of fish, shellfish, seaweed and sediment samples. The most significant source of this anthropogenic radioactivity arises from the liquid discharges from the Sellafield nuclear...
Prof.
Grazia Gambarini
(Università degli Studi di Milano and INFN, Milano, Italy)
23/09/2011, 09:35
In tissue exposed to high-flux epithermal neutron beams, the reactions mainly responsible for the absorbed dose in tissue are those with hydrogen and nitrogen, that is 1H(n,γ)2H (σ = 0.33 b), whose γ-rays of 2.2 MeV can travel many centimetres through tissue, and 14N(n,p)14C (σ = 1.81 b), whose emitted protons of about 0.6 MeV have short range in tissue, giving local dose deposition. The fast...
Prof.
Amares Chatt
(SLOWPOKE-2 Facility, Trace Analysis Research Centre, Department of Chemistry, Dalhousie University, Halifax, NS, B3H 4J3, Canada)
23/09/2011, 11:00
Simultaneous speciation neutron activation analysis (SSNAA) technique is being developed in our laboratory over the last 20 years or so. This technique can be reliably used for the simultaneous determination of not only various species of a single element but also species of other elements present in the same sample. Almost all speciation techniques consist of two steps. The first step...
Prof.
Jan Kucera
(Nuclear Physics Institute ASCR, Rez, Czech Republic)
23/09/2011, 11:20
There is a need for reliable determination of low levels of essential elements in human, animal and plant tissues, as well as for elements, which are toxic to organisms at trace concentrations. The former category of essential elements comprises B, Co, Cr, Cu, F, Fe, I, Mn, Mo, Ni, Se, Si and Zn (sometimes, depending upon the definition Li and V are added to this list), while in the latter...
Dr
Andrea Salvini
(Università di Pavia), Dr
Massimiliano Clemenza
(Università di Milano Bicocca)
23/09/2011, 11:40
Copper, thanks to its low content in radioactive contaminations, is a material widely used for shields, holders and others objects close to sensitive parts of the detectors in many experiments on Rare Events Physics. This imply that tools able to reach sensitivity of the order of <10-12 g of contaminants / g of Copper are of crucial importance.
A methodology based on Neutron Activation...
Dr
Michiko Fukushima
(Ishinomaki Senshu University)
23/09/2011, 11:55
Estimation of the total and bioaccessible fraction of both nutritionally and toxicologically important elements in cultivated oysters consumed by Japanese population groups are of much interest. Oysters are cultivated in Japan by hanging them on an 11-m long rope in the ocean. Levels of 20 elements in these oysters were investigated. Three bunches of oyster were collected at 1, 6, and 11 m...
Keliang Shi
(Risø National Lab for Sustainable Energy, Technical University of Denmark, DK-4000 Roskilde, Denmark),
Xiaolin Hou
(Risø National Lab for Sustainable Energy, Technical University of Denmark, DK-4000 Roskilde, Denmark)
23/09/2011, 12:10
Due to its high mobility, no stable isotope and long half-life (2.1×105 y), 99Tc is one of the most important radionuclide in safety assessment of radioactivity in environment as well as nuclear waste management. Because of the high enrichment of 99Tc in seaweed, it is widely used as a bioindicator for the marine research using 99Tc. These works require a rapid and accurate method for the...
Mrs
Selen Ekim
(Ege University)
23/09/2011, 12:25
Many washing machine detergents with different marks can easily found on the market. In this study, we have investigated the cleaning qualities of the washing machine detergents which are used in homes applying a nuclear measurement technique. Small tissue pieces (3 x 3 cm) made in cotton, have been used as a reference material which is commonly used by individuals or by related commercial...
Dr
Luigi Tommasino
(Consultant)
Radioanalytical Chemistry and Nanoparticles
oral presentation
Four passive sampling elements (termed quatrefoil) have been recently developed, which transform volume-distributed radionuclides (Bq/m3) into surface-distributed radionuclides (Bq/cm2). For what concerns airborne particles, these elements exploit the mechanisms of surface-deposition for the selective sampling of particles with nanometer- and micrometer-sizes respectively. In the case of...
Dr
Maria Chernysheva
(Lomonosov Moscow State University)
Radioanalytical Chemistry and Nanoparticles
oral presentation
Tritium atoms that form on the surface of hot tungsten filament are used as a labeled agent for organic compounds. The labeling efficiency itself under the certain conditions (W-wire temperature, tritium gas pressure and time of the explosion) and tritium distribution in the target or in its fragments can characterize the structural peculiarities of subsurface layer. Furthermore, the labeled...
