Roman A. Schmitt

TL;DR: Ce anomalies found in marine carbonates provide a sensitive indicator for the study of paleo-oceanic redox conditions as discussed by the authors, which can be used for deciphering some aspects of the paleo ocean chemistry, and is: log C Ce $ log α CePO 0 4 = 132 − 025 log P O 2 − 30 pH = −195 − 0 25 log P CO 2 + 150 log [Ca ++ ] The pH, which is related to PCO2, and PO2 are major factors for controlling the Ce concentration in seawater.

TL;DR: The strength of the K line of singly ionized calcium has been measured for several hundred A-type stars within a few hundred parsecs of the Sun and for the A stars in several galactic star clusters as mentioned in this paper.

TL;DR: In this paper, instrumental neutron activation analyses of 103 chondrites and 17 achondrites were used to measure abundances of Na, Al, Sc, Cr, Mn, Fe, Co, and Cu.

TL;DR: In this paper, an investigation has been conducted of the ureilites and the achondrite Chassigny to elucidate differences in their petrogenesis, and the experimental studies reported include the determination of elemental abundances by instrumental neutron activation analysis.

TL;DR: The geometric mean composition of the whole-rock chondrule suites are almost indistinguishable from each other for many elements; chondrules are enriched in lithophile and depleted in siderophile elements in a pattern consistent with chond rule formation by melting of preexistent materials as discussed by the authors.