D'Souza Fraddry, Bhosle Narayan B
National Institute of Oceanography, Marine Corrosion and Material Research Division, Dona Paula, 403004 Goa, India.
Biofouling. 2003 Apr;19(2):95-107. doi: 10.1080/0892701021000026147.
Mild steel (MS), stainless steel (SS) and copper (Cu) test panels were immersed in the surface water of Dona Paula Bay over a period of 15 d. During the immersion period data on the hydrography, nutrients and suspended matter were also collected. The suspended matter and fouling products on the MS, SS and Cu panels were analysed for organic carbon (OC), organic nitrogen (ON), chlorophyll a (chl a), protein and carbohydrate concentration and composition, and the dry weight (DW) was recorded. Compared to suspended matter, the chemical and biochemical components of the fouling products showed strong temporal and substratum related differences. The microfouling biomass (as DW, OC, ON, chl a and protein) on all the test panels generally increased over the period of immersion. Carbohydrates were more abundant in the suspended matter whereas fouling products were enriched in proteins. The contribution of protein-carbon to the total carbon increased over the period of immersion for the microfouling products on MS and SS whilst it did not show a consistent trend on Cu. Whereas, the carbohydrate-carbon contribution to the total carbon increased for the fouling products on MS, it did not exhibit a particular pattern on SS or Cu over the period of immersion. Capillary gas chromatographic analysis showed the presence of glucose, galactose, mannose, arabinose, xylose fucose and ribose in both the fouling products and suspended matter. However, there were differences in the relative distribution of these monosaccharides in the suspended matter and the fouling products. Glucose was the most abundant monosaccharide, which showed strong temporal variations in suspended matter. In contrast, the wt % concentrations of individual monosaccharides showed large temporal differences for the fouling products, which were strongly influenced by the period of immersion and the type of test substratum. Glucose and fucose were relatively more abundant in the fouling products on SS and Cu, whilst glucose was the most abundant monosaccharide on MS. The monosaccharide and chemical composition data suggest strong temporal changes in the composition of the fouling products.
将低碳钢（MS）、不锈钢（SS）和铜（Cu）测试面板浸入多纳保拉湾的地表水15天。在浸泡期间，还收集了水文、营养物质和悬浮物的数据。分析了MS、SS和Cu面板上的悬浮物和污垢产物的有机碳（OC）、有机氮（ON）、叶绿素a（chl a）、蛋白质和碳水化合物浓度及组成，并记录了干重（DW）。与悬浮物相比，污垢产物的化学和生化成分表现出强烈的时间和基质相关差异。在浸泡期间，所有测试面板上的微污垢生物量（以DW、OC、ON、chl a和蛋白质计）总体上有所增加。悬浮物中的碳水化合物含量更高，而污垢产物中蛋白质含量更高。对于MS和SS上的微污垢产物，蛋白质碳对总碳的贡献在浸泡期间增加，而在Cu上没有呈现出一致的趋势。而对于MS上的污垢产物，碳水化合物碳对总碳的贡献增加，在浸泡期间SS或Cu上没有呈现出特定模式。毛细管气相色谱分析表明，污垢产物和悬浮物中均存在葡萄糖、半乳糖、甘露糖、阿拉伯糖、木糖、岩藻糖和核糖。然而，这些单糖在悬浮物和污垢产物中的相对分布存在差异。葡萄糖是最丰富的单糖，在悬浮物中表现出强烈的时间变化。相比之下，单个单糖的重量百分比浓度在污垢产物中表现出较大的时间差异，这受到浸泡时间和测试基质类型的强烈影响。葡萄糖和岩藻糖在SS和Cu上的污垢产物中相对更丰富，而葡萄糖是MS上最丰富的单糖。单糖和化学成分数据表明污垢产物的组成存在强烈的时间变化。
