About: Low-level determination of silicon in biological materials using radiochemical neutron activation analysis

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Byla vyvinuta nová metoda radiochemické neutronové aktivační analýzy (RNAA) pro stanovení nízkých koncentrací Si v biologických materiálech založená na využití reakce 30Si(n,?)31Si s tepelnými neutrony. Radiochemická separace spočívá v alkalicko-oxidativním tavení vzorků a destilaci SiF4 a poskytuje frakce s vysokou radiochemickou čistotou. Byly stanoveny obsahy Si na úrovni jednotek až stovek ?g/g v řadě biologických referenčních materiálů a porovnány s literárními hodnotami. (cs) 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. 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)
Title	Low-level determination of silicon in biological materials using radiochemical neutron activation analysis Stanovení nízkých koncentrací křemíku radiochemickou neutronovou aktivační analýzou (cs) Low-level determination of silicon in biological materials using radiochemical neutron activation analysis (en)
skos:prefLabel	Low-level determination of silicon in biological materials using radiochemical neutron activation analysis Stanovení nízkých koncentrací křemíku radiochemickou neutronovou aktivační analýzou (cs) Low-level determination of silicon in biological materials using radiochemical neutron activation analysis (en)
skos:notation	RIV/61389005:_____/05:00020906!RIV06-AV0-61389005
http://linked.open.../vavai/riv/strany	811;816
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA202/03/0891), Z(AV0Z10480505)
http://linked.open...iv/cisloPeriodika	3
http://linked.open...vai/riv/dodaniDat	2006
http://linked.open...aciTvurceVysledku	Kučera, Jan
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav jaderné fyziky AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	528485
http://linked.open...ai/riv/idVysledku	RIV/61389005:_____/05:00020906
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	gel breast implants; alzhemers-disease; renal-failure (en)
http://linked.open.../riv/klicoveSlovo	renal-failure alzhemers-disease gel breast implants
http://linked.open...odStatuVydavatele	HU - Maďarsko
http://linked.open...ontrolniKodProRIV	[476BD836F75E]
http://linked.open...i/riv/nazevZdroje	Journal of Radioanalytical and Nuclear Chemistry
http://linked.open...in/vavai/riv/obor	BG
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	2 (xsd:int)
http://linked.open...vavai/riv/projekt	Research centre using thermal neutrons
http://linked.open...UplatneniVysledku	2005
http://linked.open...v/svazekPeriodika	263
http://linked.open...iv/tvurceVysledku	Kučera, Jan Zeisler, R.
http://linked.open...n/vavai/riv/zamer	Jaderná fyzika a příbuzné obory v základním, aplikovaném a interdisciplinárním výzkumu
issn	0236-5731
number of pages	6 (xsd:int)

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