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  • 1
    Electronic Resource
    Electronic Resource
    Determination of arsenic in silicon matrices by proton activation analysis (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 113 (1987), S. 309-316 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Proton activation analysis is applied to the determination of As in high-purity silicon, ion implanted with nominal doses ranging from 1014 to 1016 atoms/cm2. Both instrumental and radiochemical versions have been developed. The75 As(p, n)75Se,75 As(p, 3n)73Se and75 As(p, pn)74 As nuclear reactions have been considered in order to get the best activation conditions for delayed measurements by gamma spectrometry.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02050502
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  • 2
    Electronic Resource
    Electronic Resource
    Intestinal absorption of tellurium studied with stable tracers (1993)
    Springer
    Journal of radioanalytical and nuclear chemistry 170 (1993), S. 433-442 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract An investigation on tellurium metabolism by administration of stable tellurium isotopes124Te and126Te has been performed. Fractional intestinal absorption was determined in rabbits by the double tracer technique. The investigated subjects were given an enriched solution of one tellurium isotope orally and a few minutes later an enriched solution of the other isotope intravenously. The124Te and126Te contents in plasma samples were determined by proton nuclear activation. The methodology described offers a means to study tellurium metabolism in humans without radiation risk.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02041479
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  • 3
    Electronic Resource
    Electronic Resource
    Method for measuring suture tension in surgery (1988)
    Springer
    Medical & biological engineering & computing 26 (1988), S. 451-454 
    Details
    ISSN: 1741-0444
    Keywords: Force transducer ; Linearisation of signals ; Suture tension in surgery
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02442310
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  • 4
    Electronic Resource
    Electronic Resource
    Stable and radioactive tracers in Ru biokinetic studies (1994)
    Springer
    Journal of radioanalytical and nuclear chemistry 178 (1994), S. 407-415 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The feasibility of ruthenium metabolism studies by stable tracer administration, with a methodology based on proton nuclear activation, is presented. In order to test that the amount of stable tracer administered does not perturb significantly the mechanism investigated, a series of comparative experiments with administration of both radioactive and stable tracers has been performed on animals. As the most critical pathway seems to be the intravenous injection, four male rabbits were given an intravenous injection of radioactive106Ru. Successively, the rabbits were given either a further injection of radioactive106Ru or injection of different quantities of natural Ru. The activity of106Ru and the concentration of natural Ru were measured in plasma samples withdrawn at different time intervals from the injections and the results were compared. Some biokinetic parameters and tissue distribution of Ru in rabbits were determined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02039734
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  • 5
    Electronic Resource
    Electronic Resource
    A computer controlled apparatus for cyclic instrumental CPAA (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 217 (1997), S. 283-287 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract An apparatus for cyclic charged particle activation was designed, built and connected to the 7 MV Van de Graaff CN accelerator of the Laboratori Nazionali dell'Istituto Nazionale di Fisica Nucleare di Legnaro (Italy). It mainly consists of a two-sample transverse moving system controlled by a Cycle Control Module (CCM). This module is based on a Programmable Logic Device (PLD) for the definition of the requested flow-maps and functions. The CCM operates the cc motor for sample movements by means of a power width modulation technique. It also controls the beam switch and the setting mode of the acquisition system which is connected to two HPGe detectors. As a feasibility test, the best experimental conditions for aluminium determination in complex. Al-doped biological samples were found to be an irradiation time of 3.5 minutes and a measuring time of 6 minutes. The signal to background ratio is reported as a function of the number of cycles.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02034457
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  • 6
    Electronic Resource
    Electronic Resource
    Proton, Photon and Neutron Activation Analysis for the Determination of Stable Isotopes of Gadolinium in Human Blood Plasma (2000)
    Springer
    Journal of radioanalytical and nuclear chemistry 243 (2000), S. 707-714 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The biokinetics of radioactive substances can be studied using stable tracers. For the highly radiotoxic actinides, for which no stable isotopes are available as tracers, the use of stable isotopes of lanthanides as chemically related surrogates has been suggested. In this work, the possibility of using activation analysis with protons, photons, or thermal neutrons for the determination of single stable isotopes of gadolinium in biological samples has been tested. All the techniques show very good linearity response, and may be considered as complementary. Whereas activation analysis with protons is recommendable for the simultaneous determination of two different isotopes, neutron and photon (gamma) activation analysis should be chosen whenever a better sensitivity or simplicity of the analysis is required.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1010626504718
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  • 7
    Electronic Resource
    Electronic Resource
    Chromium in human serum determined by proton activation (1987)
    Springer
    Journal of radioanalytical and nuclear chemistry 111 (1987), S. 351-357 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A method for Cr determination in biological samples based on proton nuclear activation is presented. The activation was induced by a 13.8 MeV proton beam of the AVF Cyclotron of Milan University via a (p, n) reaction on the nuclei of the target. For the quantitative determination Cd has been chosen as reference element. The method has been applied to Cr determination in human serum samples. The experimental procedure is described and results are presented and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02072868
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  • 8
    Electronic Resource
    Electronic Resource
    CPAA for studying biokinetics with stable isotopes: A preliminary investigation on zirconium metabolism in animals (1997)
    Springer
    Journal of radioanalytical and nuclear chemistry 217 (1997), S. 279-282 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In order to estimate gut absorption by determining tracer concentration in plasma, a technique based on the administration of two stable isotopes of the same element was combined with proton activation analysis. The optimization for the determination of Zr isotopes in biological samples is presented together with the results of a preliminary study on Zr biokinetics in animals. (p,n) reactions on90Zr and96Zr resulted the most convenient. The obtained minimum detectable quantities are 3 and 2 ng/ml plasma, respectively, for90Zr and96Zr. Zr plasma clearance and Zr response to a simple oral test were studied separately in different subjects by using the natural Zr solution. The data analysis was performed measuring the concentration of90Zr to obtain indication on the time behavior and fractional level of Zr appearance in plasma depending on the administration routes. Two rabbits were intravenously injected 50 μg90Zr and a third rabbit was orally given 2.5 mg of90Zr. Concentration in plasma samples of intravenously and orally given Zr isotopes are reported, as a function of time after administration. The injected tracer concentration relative to the first two rabbits were fitted simultaneously to obtain clearance parameters. Zr intestinal absorption is evaluated to be less than 0.2%. The work confirms that proton activation is a powerful tool for biokinetic studies with stable isotopes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02034456
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  • 9
    Electronic Resource
    Electronic Resource
    Cadmium and titanium in human serum determined by proton nuclear activation (1985)
    Springer
    Journal of radioanalytical and nuclear chemistry 91 (1985), S. 197-203 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract An investigation of the quantitative content of Cd and Ti in human serum samples by proton nuclear activation (PNA) has been performed and the results are presented. The activation has been induced by a 13.5 MeV proton beam of the AVF cyclotron of the University of Milan, via a (p, n) reaction on the nuclei of the target. For the quantitative determination a known amount of a reference element has been added to the samples and comparison has been made with a standard sample containing also known quantities of the elements studied. Response linearity, reproducibility and possible contaminations have been tested.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02036327
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  • 10
    Electronic Resource
    Electronic Resource
    Radiocesium contamination in soil due to the Chernobyl accident (1991)
    Springer
    Journal of radioanalytical and nuclear chemistry 150 (1991), S. 129-142 
    Details
    ISSN: 1588-2780
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Three different cereal cultivated fields (rice, maize/wheat, wheat/barley) were selected and soil samples were collected in order to study the behaviour of the radiocesium deposited over the crops after the Chernobyl accident fall-out (April 1986) together with its distribution at different ground depths. For each field, soil samples were removed during the sowing (Oct–Nov '86), in Spring (Apr '87) and during the harvest time (Jun–Sept '87). The40K concentration and stable potassium content in soil was also evaluated by nuclear spectrometry and by atomic absorption spectrometry. Beside soil sample measurements, the cultivated cereals produced in the 1986 harvest (rice, maize, wheat) were analyzed to evaluate the deposited contamination, and in order to evaluate the contamination during the growth and naturation we also analyzed whole plants (roots, stalks, grains) of the cultivated cereals (rice, wheat, barley) in 1987. Results are presented and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02041496
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