"Low-level determination of silicon in biological materials using radiochemical neutron activation analysis" . "Low-level determination of silicon in biological materials using radiochemical neutron activation analysis"@en . "P(GA202/03/0891), Z(AV0Z10480505)" . "Low-level determination of silicon in biological materials using radiochemical neutron activation analysis" . . "Byla vyvinuta nov\u00E1 metoda radiochemick\u00E9 neutronov\u00E9 aktiva\u010Dn\u00ED anal\u00FDzy (RNAA) pro stanoven\u00ED n\u00EDzk\u00FDch koncentrac\u00ED Si v biologick\u00FDch materi\u00E1lech zalo\u017Een\u00E1 na vyu\u017Eit\u00ED reakce 30Si(n,?)31Si s tepeln\u00FDmi neutrony. Radiochemick\u00E1 separace spo\u010D\u00EDv\u00E1 v alkalicko-oxidativn\u00EDm taven\u00ED vzork\u016F a destilaci SiF4 a poskytuje frakce s vysokou radiochemickou \u010Distotou. Byly stanoveny obsahy Si na \u00FArovni jednotek a\u017E stovek ?g/g v \u0159ad\u011B biologick\u00FDch referen\u010Dn\u00EDch materi\u00E1l\u016F a porovn\u00E1ny s liter\u00E1rn\u00EDmi hodnotami."@cs . . "RIV/61389005:_____/05:00020906!RIV06-AV0-61389005" . "gel breast implants; alzhemers-disease; renal-failure"@en . "Low-level determination of silicon in biological materials using radiochemical neutron activation analysis"@en . . "0236-5731" . "6"^^ . "RIV/61389005:_____/05:00020906" . "Stanoven\u00ED n\u00EDzk\u00FDch koncentrac\u00ED k\u0159em\u00EDku radiochemickou neutronovou aktiva\u010Dn\u00ED anal\u00FDzou"@cs . . . . "Zeisler, R." . "1"^^ . . "A new radiochemical neutron activation analysis (RNAA) method has been developed for low-level determination of Si in biological materials, which is based on the Si-30(n,gamma)Si-31 nuclear reaction with thermal neutrons. The radiochemical separation consists of an alkaline-oxidative decomposition followed by distillation of SiF4. Nuclear interferences, namely that of the P-31(n,p)Si-31 with fast neutrons, have been examined and found negligible only when irradiation is carried out in an extremely well-thermalized neutron spectrum, such as available at the NIST reactor. The RNAA procedure yields excellent radiochemical purity of the separated fractions, which allows the measurement of the beta(-)-activity of the Si-31 by liquid scintillation counting."@en . . "[476BD836F75E]" . "811;816" . . "Journal of Radioanalytical and Nuclear Chemistry" . "2"^^ . "HU - Ma\u010Farsko" . "Ku\u010Dera, Jan" . "528485" . . . "A new radiochemical neutron activation analysis (RNAA) method has been developed for low-level determination of Si in biological materials, which is based on the Si-30(n,gamma)Si-31 nuclear reaction with thermal neutrons. The radiochemical separation consists of an alkaline-oxidative decomposition followed by distillation of SiF4. Nuclear interferences, namely that of the P-31(n,p)Si-31 with fast neutrons, have been examined and found negligible only when irradiation is carried out in an extremely well-thermalized neutron spectrum, such as available at the NIST reactor. The RNAA procedure yields excellent radiochemical purity of the separated fractions, which allows the measurement of the beta(-)-activity of the Si-31 by liquid scintillation counting." . "263" . . . "Stanoven\u00ED n\u00EDzk\u00FDch koncentrac\u00ED k\u0159em\u00EDku radiochemickou neutronovou aktiva\u010Dn\u00ED anal\u00FDzou"@cs . . . . "3" . .