<p> A procedure was established for instrumental radioactivation analysis of selenium in biological materials using se77m, and used to determine selenium bound to plasma and cells of blood from 254 normal individuals. Variations with time, age, sex and hematocrit were investigated. Analysis of subfractions of plasma and cells indicated the highest selenium concentration in the plasma alpha and beta globulins. The selenium content of other tissues was determined for two individuals.</p> <p> A method was devised for instrumental radioactivation analysis of sulphur in dialyzed biological material using s37. The bound sulphur content of samples of plasma and cells from normal human blood was determined. The method would appear to have application in the instrumental activation analysis for other elements in various matrices.</p> / Thesis / Doctor of Philosophy (PhD)

Ceramic production and exchange in Early Bronze Age Greece have been studied through provenance determination by neutron activation analysis. The concentrations of Na, K, Rb, Cs, Ca, Al, Sc, La, Ce, Eu, Yb, Th, Ti, Hf, V, Cr, Mn, Fe, and Co were determined, with respect to Perlman-Asaro standard pottery, in 255 objects of the Early Helladic (or EH) II and III periods found at Keramidhaki, Korakou, Phlious, Zygouries, Tiryns, and Asine in Korinthia and Argolis. Multivariate treatment of these data, merged with 162 analyses from the author's earlier work with samples from Lerna (Argolis) and Lake Vouliagmeni (Korinthia), yielded 11 compositional reference groups. Many of these could be attributed to centres of production on distributional or other grounds, thereby allowing the sources of more than half the sampled objects to be determined. / The following conclusions were reached: All 8 sites (except possibly Phlious) were sources of common EH II ware (sauceboats and small bowls), which had limited distributions. Many unusual EH II fine wares had other sources and broader distributions. The attribution of coarse wares was complicated by the presence of tempering material. The changes in pottery acquisition patterns which accompanied the beginning of EH III were probably more drastic at Tiryns than at Lerna or Korakou.

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Made available in DSpace on 2014-10-09T12:38:56Z (GMT). No. of bitstreams: 0 / Made available in DSpace on 2014-10-09T13:59:43Z (GMT). No. of bitstreams: 1 02755.pdf: 2809959 bytes, checksum: a21b5dc47bef9cb4b424a52336924fa8 (MD5) / Dissertacao (Mestrado) / IPEN/D / Instituto de Pesquisas Energeticas e Nucleares - IPEN/CNEN-SP