For the irradiations, 40 mµ thick tantalum foils were used that have been annealed after being rolled and labelled with 57Co. Diffusion impingement of evaporated radioactive atoms onto the surface of tantalum substrates was carried out for 140 minutes at 1270-1275 К (E-7 Torr) that was followed by cooling both the foils and the furnace down to the ambient temperature.
Irradiation conditions...
Over the past decade, the scientific community involved in the research and development of therapeutic radiopharmaceuticals (RPhs), has been taking growing interest in the isotope of the rare-earth element, Lu. 177Lu radionuclide (T1/2 = 6.65 days) exerts the properties of a “soft” β—emitter (Eβmax = 498 keV), which makes it convenient for treatment of small malignant formations (the maximum...
In the present study, the carboxymethyl cellulose (CMC) hydrogel containing activated carbon-silver nanoparticles (Ag NPs) composites (Acc-Ag composites) was fabricated for the highly functional wound-dressings by electron beam irradiation. For this, the Acc-Ag composites were first prepared using a thermal treatment under an inert argon (Ar) atmosphere. During the thermal treatment, the Ag...
Black liquor is biomass-based industrial waste obtained from the chemical pulping process of wood. The lignocellulosic materials such as lignin, hemicellulose and other extractives are dissolved into black liquor. Lignin, which can also be extracted from black liquor, exhibits good thermal stability and high carbon yield. In the present study, compared to the lignin obtained by a lab-scale...
At the ELI Beamlines facility the first endstations dedicated to user experiments that are starting just now are those of the team fulfilling the Research Program 4: Applications in Molecular, Biomedical and Material Science. The endstations will utilize optical, extreme UV and plasma X-ray beams to perform pump-probe experiments on diverse sets of samples (free atoms, molecules and their...
TeaM Cables is a European collaborative Research and Innovation project focusing on nuclear cable ageing.It has received 4.2 M€ of funding from the Horizon 2020 Euratom Research and Training Programme of the European Union. TeaM Cables started in September 2017 for a duration of 4.5 years.
TeaM Cables aims at providing NPP operators with a novel methodology for efficient and reliable NPP...
Dressings for human wounds have been aimed at protection, removal of exudate, inhibition of exogenous microorganism invasion, and improved appearance. Protection was accomplished by covering the wound with dressing materials. Wound areas that are kept just damp may heal faster, but accumulation of exudates under the dressing can cause infection. Silver is important in the treatment of wounds...
The effects of dose, dose rate, hypothermia (1 hour at 0 °C before and after irradiation) and simultaneous action of two different scavengers on the radiation protection of microorganisms due to the scavenging of OH radicals were investigated. The quantitative evaluation of this protection was carried out by means of the slope k = dσ / dQ where σ = ln S0 / ln S, Q is the scavenging efficiency...
Liquid extraction is widely used in radiochemistry for the concentration and separation of elements. When the organic phase containing the extragent contacts with the aqueous phase in which contains element the reactions occur in the interfacial layer. As a result of the reactions, several compounds are formed, among which there are often those that do not directly pass into either the organic...
The influence of ionizing radiation on living cells’ radiation sensitivity can be affected by many parameters like dose rate, temperature, level of oxygen in irradiated system or presence of some chemicals (radioprotectors or radiosensitizers). Radioprotectors can reduce radiation sensitivity of living cells to ionizing radiation due to their high reactivity with hydroxyl radicals produced...
Radiation- and photo-induced precipitation was used for the synthesis of nanopowder scintillators based on ZnO:Ga. It is very efficient method published rarely outside of our research group. In principle, an aqueous solution of precursors (in the case of ZnO usually zinc nitrate or formate, a scavenger of OH radicals and/or hydrogen peroxide) is irradiated by non-ionizing (UV) or ionizing (γ,...
The aim is this work is to establish if the presence of a solid surface, like a clay mineral, during the irradiation of adenine (purine bases) alter the stability, formation, and distribution of radiolytic products in comparison with samples of those molecules without the mineral. The results showed that these bases could receive higher irradiation doses with less decomposition to the samples...
Chemical evolution encompasses the formation of biologically relevant compounds started from simple inorganic molecules and promoted by an energy input. Among the possible energy sources for these processes is radioactivity. This research is done in this framework, and it is aimed to study the effect of ionizing radiation on oxygen-free, aqueous solutions of ammonium succinate. Particularity...
Cerium dioxide is known as a non-radioactive structural substitute of actinide oxides (UO2 and PuO2). CeO2-based ceramics is suggested as an inert 239Pu or 235U bearing matrix for nuclear fuel, as well as a matrix for high-level waste disposal. CeO2 is also used an exhaust gas afterburning catalysts and in electronics.
X-ray photoelectron spectral structure of CeO2 valence electrons in the...
Cerium dioxide, CeO2, is a fluorite structure ceramic widely used as an inactive structural surrogate to UO2 and PuO2 to avoid difficulties associated when working with radioactive materials. This material is suggested to be used as an inert matrix for perspective nuclear fuels and highly radioactive waste disposal. Irradiation studies, where CeO2 is exposed to ions with different mass and...
