41 research outputs found
Radiocarbon geochronology of the sediments of the São Paulo Bight (southern Brazilian upper margin)
Full text linkFishing strategies among prehistoric populations at Saquarema Lagoonal Complex, Rio de Janeiro, Brazil
Full text linkVibrational spectra of Aerosol-OT homologous sodium dialkylsulfosuccinates - normal coordinate analyses of sodium diethylsulfosuccinate and sodium dimethylsulfosuccinate and their application to longer homologues
No full textRaman and IR spectroscopic studies of the interaction between counterion and polar group in self-assembled systems of AOT-homologous "sodium dialkyl sulfosuccinates"
No full textA secondary isotopic reference material of chlorine from selected seawater
No full textA secondary isotopic reference material of chlorine as NaCl collected from a sea water, located at 4degrees18'N, 161degrees08'E and collected on October 22, 1994, was prepared using ion exchange technique. The delta(37)Cl of an NaCl product named ISL 354 was measured to be - 0.39 +/- 0.05parts per thousand (2sigma) related to NIST SRM 975, an isotopic standard reference material with an kabsolute Cl-37/Cl-35 ratio of 0.31977. No contamination or isotopic fractionation was observed due to a complete recovery of chlorine and the avoidance of chemical reagents during preparation of ISL 354 from selected seawater. The isotopic composition of chlorine in ISL 354 does not change on long-term storage. So ISL 354 can be used as a secondary isotopic reference material of chlorine. (C) 2002 Elsevier Science B.V. All rights reserved
Raman scattering spectra of Aerosol-OT homologous sodium dialkylsulfosuccinates and the environment of their hydrophobic chains
No full textInfrared absorption spectra of Aerosol-OT homologous sodium dialkylsulfosuccinates and the effect of crystal polymorphism on the environment of the succinate segment
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