Major biochemical composition of dissolved high molecular weight organic matter in seawater

ceanic dissolved organic matter (DOM) represents one of the largest dynamic reservoirs of carbon on earth. At approximately 10;The main goal of this dissertation has been the use of tangential flow ultrafiltration (UF) to isolate and characterize a first set of chemically representative samples of oceanic DOM. In collaboration with Dr. Ron Benner at the University of Texas, this project represented the first wide-ranging application of UF as an isolation technique for marine DOM samples. On a series of five research cruises we isolated very large DOM samples (typically processing ;In the first part of this dissertation, I used a hierarchy of chemical approaches, from broad-based to molecular-level, to investigate the composition of the ultrafiltered DOM (UDOM). Elemental ratios and solid-state...