Characterization of Dissolved Organic Matter in Seawater by Ultrafiltration and Chemical Analysis

小行星9413843 海水中溶解性有机物（DOM）的来源和反应的研究将主要集中在总溶解性有机物的20-30%，其可以通过切向流超滤温和地分离相对大量。 研究的三个中心目标是： 1. 为了确定生物来源和转化的 主要DOM组件。 2. 为了阐明DOM组分之间的组成趋势， 不同的尺寸。 3. 为了详细描述的组成和协会 包括海水DOM的各种有机材料。 确定DOM的生物和成岩起源的研究将强调在DOM浓度和成分差异很大的上柱发生的快速过程。 更好地了解不同大小的溶解有机物质之间的组成趋势将有助于描绘影响DOM循环的过程，并判断如何代表性的超滤分离物是散装DOM。超滤DOM的组成和形式的更详细的表征将有助于区分其生物来源，确定关键的转换，和解卷积DOM成分之间的功能关系。这一系列的研究已经为巨大的海水DOM池的反应性和难降解成分提供了新的见解，并应继续产生对广泛的海洋学研究有用的信息。

9413843 BENNER Research on the sources and reactions of dissolved organic matter (DOM) in seawater will focus primarily on the 20-30% of total dissolved organic matter which can be gently isolated in relatively large amounts by tangential-flow ultrafiltration. The three central objectives of research are: 1. To identify the biological sources and transformations of the major DOM components. 2. To elucidate compositional trends among DOM constituents of different size. 3. To characterize in detail the compositions and associations of the various organic materials comprising seawater DOM. Research to determine the biological and diagenetic origins of DOM will emphasis rapid processes occurring in the upper column where large differences in DOM concentrations and compositions are observed. A better understanding of compositional trends among dissolved organic materials of different size will help to delineate processes affecting DOM cycling and to judge how representative ultrafiltered isolates are of bulk DOM. More detailed characterizations of the compositions and forms of ultrafiltered DOM will aid in distinguishing its biological sources, identifying key transformations, and deconvoluting functional relationships among DOM constituents. This line of research has already provided new insights on both the reactive and refractory components of the immense seawater DOM pool and should continue to yield information useful over a wide range of oceanographic studies.