Atmospheric chemistry and the biosphere: general discussion.
Atmospheric chemistry and the biosphere: general discussion.
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大气化学和生物圈：一般性讨论。
DOI：
10.1039/c7fd90038d
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发表时间：
2017
影响因子：
3.4
通讯作者：
Archibald A
中科院分区：
文献类型：
--
作者：
Archibald A
露西·卡彭特（Lucy Carpenter）开始讨论克里斯蒂安·乔治（Christian George）的论文：您之前的工作强调了海洋表面过程中挥发性有机化合物的非生物产生，主要来自表面活性剂的光敏化学反应。这项工作是否表明微生物细胞的腐烂是这些产生voc的表面活性剂和光敏剂的真正主要来源，如果是这样的话，这真的意味着这是一个非生物过程吗？克里斯汀·乔治回答说：正如我们的论文所显示的，当微生物细胞死亡时，挥发性有机化合物的排放量急剧增加。此外，观察到生物lms的细胞部分（即细胞内物质和细胞碎片）的VOC产量最高。因此，我们认为细胞裂解至少是环境中产生这种voc表面活性剂的主要来源之一。除此之外，人为污染物可能是表面活性剂的另一个来源，然而，这种排放将是相当局部的重要性。虽然在我们的研究中，表面活性剂的来源是生物源的，但观察到的VOCs光化学生产可以被认为完全是“非生物的”。
Lucy Carpenter opened discussion of the paper by Christian George: Your previous work has emphasised the abiotic production of VOCs from surface ocean processes, mainly from photosensitized chemistry of surfactants. Does this work indicate that decay of microbial cells is the really dominant source of these VOC-producing surfactants and photosensitizers, and if so-does this really mean this is an abiotic process?Christian George responded: As shown in our paper, VOC emissions increased drastically when the microbial cells were dying. Moreover, the highest VOC production was observed for the cellular fraction of the bio lms, ie intracellular material and cellular debris. Thus, we think that cell lysis is at least one of the major sources for such VOC-producing surfactants in the ambient environment. Besides this, anthropogenic pollutants could be an additional source for surfactants, however, such emissions would be of rather local importance. Although the source for the surfactants is biogenic in our study, the observed photochemical production of VOCs can be de ned as entirely ‘abiotic’.