Fast and non-destructive neutron activation analysis for simultaneous determination of TiO and SiO in sunscreens with attention to regulatory and research issues.

A new instrumental neutron activation analysis (INAA) for the simultaneous determination of titanium (TiO) and silica (SiO) dioxide as UV-filters in sunscreens is described. Samples are encapsulated, neutron irradiated (30 s) and after a suitable decay (3 min), the induced Ti (T = 5.76 min) and Al (T = 6.

Decommissioning procedure and induced activation levels, calculations and measurements in an 18 MeV medical cyclotron.

The present article describes the decommissioning of a self-shielded 18 MeV medical cyclotron IBA Cyclone 18/9 after 14 years of operation. A Monte Carlo simulation of the possible nuclear reactions was performed in order to plan the decommissioning activities. During the cyclotron dismantling, the activities of the cyclotron components, concrete wall and floor samples were measured.

Metallobiochemistry of ultratrace levels of bismuth in the rat I. Metabolic patterns of Bi in the blood.

Background: The number of the applications of bismuth (Bi) is rapidly and remarkably increasing, enhancing the chance to increase the levels to which humans are normally daily exposed. The interest to Bi comes also from the potential of Bi-based nanoparticles (BiNPs) for industrial and biomedical purposes. Like other metal-based NPs used in nanomedicine, BiNPs may release ultratrace amounts of Bi ions when injected.

Genotoxicity and Immunotoxicity of Titanium Dioxide-Embedded Mesoporous Silica Nanoparticles (TiO@MSN) in Primary Peripheral Human Blood Mononuclear Cells (PBMC).

TiO nanoparticles (TiO NPs) are the nanomaterial most produced as an ultraviolet (UV) filter. However, TiO is a semiconductor and, in nanoparticle size, is a strong photocatalyst, raising concerns about photomutagenesis. Mesoporous silica nanoparticles (MSN) were synthetized incorporating TiO NPs (TiO@MSN) to develop a cosmetic UV filter.

Hadron Therapy, Magnetic Nanoparticles and Hyperthermia: A Promising Combined Tool for Pancreatic Cancer Treatment.

A combination of carbon ions/photons irradiation and hyperthermia as a novel therapeutic approach for the in-vitro treatment of pancreatic cancer BxPC3 cells is presented. The radiation doses used are 0-2 Gy for carbon ions and 0-7 Gy for 6 MV photons. Hyperthermia is realized via a standard heating bath, assisted by magnetic fluid hyperthermia (MFH) that utilizes magnetic nanoparticles (MNPs) exposed to an alternating magnetic field of amplitude 19.

On the production of Mn by deuteron irradiation on natural chromium and its radionuclidic purity.

The positron emitter Mn is used for the Positron Emission Tomography - PET imaging.In this work we investigate the nuclear reactions for production of Mn and Mn induced by deuteron beams on natural chromium targets at energies up to E = 28 MeV using the stacked-foils activation technique. We calculate the thick target yields for Mn and for the radionuclidic impurity Mn, and we compare the radionuclidic purity of Mn with that achievable in proton activation of Cr.

Excitation function and yield for the Rh(d,2n)Pd nuclear reaction: Optimization of the production of palladium-103.

Deuteron-induced nuclear reactions for the generation of Pd were investigated using the stacked-foil activation technique on rhodium targets at deuteron energies up to E=33MeV. The excitation functions of the reactions Rh(d,xn)Pd, Rh(d,x)Rh and Rh(d,2p)Ru have been measured, and the Thick-Target Yield for Pd has been calculated.

Uptake from water, internal distribution and bioaccumulation of selenium in Scenedesmus obliquus, Unio mancus and Rattus norvegicus: part B.

(75)Se-selenite transfer was investigated in a phytoplankton-mussel-rat food chain model consisting of Scenedesmus obliquus (Turpin) Kützing, Unio mancus Lamark and Rattus norvegicus Berkenhout. (75)Se-metabolized forms were investigated in order to identify potential critical steps in the food chain, as well as its relative bioavailability looking also at intracellular, cellular and organ partitioning. Tissue and intracellular distribution of (75)Se in mussels fed with (75)Se-S.

Uptake from water, internal distribution and bioaccumulation of selenium in Scenedesmus obliquus, Unio mancus and Rattus norvegicus: part A.

The (75)Se internal bioavailability was investigated in microalgae, mussels and rats as biological experimental models. The (75)Se accumulation from freshwater to microalgae [Scenedesmus obliquus (Turpin) Kützing], from freshwater to mussels (Unio mancus Lamark) and, finally, per os to rats (Rattus norvegicus Berkenhout) was followed using (75)Se-labelled selenite looking at (75)Se uptake, retention, intracellular distribution and binding with cellular biocomplexes. After exposure to 10, 50 and 500 μg Se L(-1), the microalgae showed an inhibitory effect on population growth only at the highest concentration.

The excitation functions of (100)Mo(p,x)(99)Mo and (100)Mo(p,2n)(99m)Tc.

Proton-induced nuclear reactions for generation of (99)Mo and (99m)Tc radionuclides were investigated using the stacked-foil activation technique on 99.05% enriched (100)Mo targets at energies up to Ep=21MeV. Excitation functions of the reactions (100)Mo(p,x)(99)Mo and (100)Mo(p,2n)(99m)Tc have been measured.

Physical optimization of production by deuteron irradiation of high specific activity (177g)Lu suitable for radioimmunotherapy.

Deuteron-induced nuclear reactions for generation of no-carrier-added (NCA) Lu isotopes were investigated using the stacked-foil activation technique on natural Yb targets at energies up to Ed=18.18MeV. The decay curve of ¹⁷⁷Yb, the growth curve of the cumulative (direct and indirect) and the direct production of (177g)Lu were determined.

[The construction process of managerial profile competencies for nurse coordinators in the hospital field].

The objective of this study was to construct a profile of managerial competencies, based on the consensus of nurse coordinators in the field. This study was developed in a philanthropic hospital in São Paulo, following the research-action model, and included 13 nurse coordinators as participants. The data collection was performed using the focal group technique.

Fukushima fallout at Milano, Italy.

The radionuclides (131)I, (137)Cs and (134)Cs were observed in the Milano region (45°) of Italy early after the nuclear accident in Fukushima, Japan. Increased atmospheric radioactivity was observed on an air filter taken on 30 March 2011, while the maximum activity of 467 μBq m(-3) for (131)I was recorded at April 3-4, 2011. The first evidence of Fukushima fallout was confirmed with (131)I and (137)Cs measured in precipitation at two sampling sites at Milano on 28 March, 2011, with the concentrations of (131)I and (137)Cs in the rainwater equal to 0.

Excitation function for deuteron induced nuclear reactions on natural ytterbium for production of high specific activity 177g Lu in no-carrier-added form for metabolic radiotherapy.

Deuteron-induced nuclear reactions for generation of no-carrier-added Lu radionuclides were investigated using the stacked-foil activation technique on natural Yb targets at energies up to E(d)=18.18 MeV. Excitation functions of the reactions (nat)Yb(d,xn)(169,170,171,172,173,174g,174m,176m,177g)Lu and (nat)Yb(d,pxn)(169,175,177)Yb have been measured, among them three ((169)Lu, (174m)Lu and (176m)Lu) are reported for the first time.