Adsorption of Amino Acids, Peptides, and a Monosaccharide byMarine Sediments: Importance in Organic Matter Decomposition Processes

海洋沉积物对氨基酸、肽和单糖的吸附：在有机物分解过程中的重要性

• 批准号: 8900362
• 负责人: Susan Henrichs
• 金额: $ 22.69万
• 依托单位: University of Alaska Fairbanks Campus
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1989
• 资助国家: 美国
• 起止时间: 1989-04-15 至 1991-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8900362&HistoricalAwards=false
• 关键词: Adsorption; Amino; Acids; Peptides; Monosaccharide

Many organic compounds, including both polar and nonpolar substances, are adsorbed by marine sediments. Adsorbed organic substances determine the physicochemical properties ofmostparticle surfaces in natural waters. Further,adsorptionaffects thr rate of decomposition of organic substancesbybacteria. The proposed research will investigate theadsorptionof the amino acids alanine, glutamic acid, lysine, andleucine:several alanine peptides, and the monosaccharide glucose. Thegoals are to determine which organic constituents ofsedimentsadsorb amino acids, the effects of adsorption ondecompositionrates, and the mechanisms of adsorption. THeapproach willinvolve both field studies on fresh, intactsediments andlaboratory experiments with extracted sedimentorganic matter.The results of these studies will help answer thequestion: Isadsorption responsible, in part, for variation indecompositionrates of different organic substances? Doesadsorptioncontribute to differences in decomposition rates of thesameorganic compound in sediments of differing composition?

许多有机化合物，包括极性和非极性物质，都被海洋沉积物吸附。吸附的有机物质决定了天然水域中大多数颗粒表面的物理化学性质。此外，吸附影响细菌对有机物质的分解速度。这项拟议的研究将研究氨基酸丙氨酸、谷氨酸、赖氨酸和亮氨酸的吸附：几种丙氨酸多肽和单糖葡萄糖。目的是确定沉积物中哪些有机成分吸附氨基酸，吸附对分解速率的影响，以及吸附的机理。这种方法既包括对新鲜完整沉积物的野外研究，也包括对提取的沉积物有机质的实验室实验。这些研究的结果将有助于回答这个问题：吸附在一定程度上是不是导致不同有机物分解速率的差异？在不同组成的沉积物中，吸附是否会导致同一有机化合物的分解速率不同？