Age-Targeted Income Taxation, Labor Supply, and Retirement
In: CESifo Working Paper No. 8988
4 Ergebnisse
Sortierung:
In: CESifo Working Paper No. 8988
SSRN
In: Environmental science and pollution research: ESPR, Band 28, Heft 20, S. 25878-25885
ISSN: 1614-7499
AbstractOver the last two decades, the occurrence of hydroxylated polybrominated diphenyl ethers (OH-PBDEs) has been observed to be nearly ubiquitous among Baltic Sea filamentous macroalgae. High concentrations are continuously recorded among red, green, and brown filamentous algae. Several of these algae species are ephemeral, and when large parts of the colonies decay at the end of their lifecycles, the OH-PBDEs are expected to largely partition to the sediment. In this study, the fate of OH-PBDEs in Baltic Sea sediment was investigated, with focus on the effect of reductive debromination. During chemical debromination, it was observed that the half-life could differ with as much as two orders of magnitude between a pentabrominated and a tetrabrominated congener. Using collected Baltic Sea sediment, it was further observed that the half-life of spiked pentabrominated OH-PBDEs spanned from a few days up to a few weeks in room temperature. At 4 °C, it took 6 months to achieve a 50% decrease in concentration of the fasted degrading congener. Clear differences in selectivity between chemical debromination and debromination in sediment were also observed when studying the major reaction products. Baltic Sea sediment seems to have a good capacity for reducing naturally produced OH-PBDEs.
In: Synthese: an international journal for epistemology, methodology and philosophy of science, Band 184, Heft 3, S. 387-405
ISSN: 1573-0964
In: IZA Discussion Paper No. 16561
SSRN