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Statements

Subject Item
n2:RIV%2F61389005%3A_____%2F05%3A00020906%21RIV06-AV0-61389005
rdf:type
skos:Concept n17:Vysledek
dcterms: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. 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.
dcterms:title
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 Stanovení nízkých koncentrací křemíku radiochemickou neutronovou aktivační analýzou
skos:prefLabel
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 Stanovení nízkých koncentrací křemíku radiochemickou neutronovou aktivační analýzou
skos:notation
RIV/61389005:_____/05:00020906!RIV06-AV0-61389005
n4:strany
811;816
n4:aktivita
n7:P n7:Z
n4:aktivity
P(GA202/03/0891), Z(AV0Z10480505)
n4:cisloPeriodika
3
n4:dodaniDat
n11:2006
n4:domaciTvurceVysledku
n18:9757902
n4:druhVysledku
n8:J
n4:duvernostUdaju
n16:S
n4:entitaPredkladatele
n14:predkladatel
n4:idSjednocenehoVysledku
528485
n4:idVysledku
RIV/61389005:_____/05:00020906
n4:jazykVysledku
n12:eng
n4:klicovaSlova
gel breast implants; alzhemers-disease; renal-failure
n4:klicoveSlovo
n10:renal-failure n10:gel%20breast%20implants n10:alzhemers-disease
n4:kodStatuVydavatele
HU - Maďarsko
n4:kontrolniKodProRIV
[476BD836F75E]
n4:nazevZdroje
Journal of Radioanalytical and Nuclear Chemistry
n4:obor
n6:BG
n4:pocetDomacichTvurcuVysledku
1
n4:pocetTvurcuVysledku
2
n4:projekt
n15:GA202%2F03%2F0891
n4:rokUplatneniVysledku
n11:2005
n4:svazekPeriodika
263
n4:tvurceVysledku
Zeisler, R. Kučera, Jan
n4:zamer
n13:AV0Z10480505
s:issn
0236-5731
s:numberOfPages
6