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马来酰亚胺指数：一种基于通过铬酸氧化获得的破碎化石叶绿素的古氧化还原指数。

Maleimide index: a paleo-redox index based on fragmented fossil-chlorophylls obtained by chromic acid oxidation.

作者信息

Asahina Kenta, Takahashi Satoshi, Saito Ryosuke, Kaiho Kunio, Oba Yasuhiro

机构信息

Research Institute for Geo-Resources and Environment, Geological Survey of Japan, National Institute of Advanced Industrial Science and Technology (AIST) Central 7, 1-1-1 Higashi Tsukuba Ibaraki 305-8567 Japan

Department of Earth and Environmental Sciences, Nagoya University Furo-cho, Chikusa-ku Nagoya Aichi 464-8601 Japan.

出版信息

RSC Adv. 2022 Oct 31;12(48):31061-31067. doi: 10.1039/d2ra04702k. eCollection 2022 Oct 27.

DOI:10.1039/d2ra04702k
PMID:36349002
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC9620498/
Abstract

The composition of past photosynthetic organisms provides information about the paleo-environment based on the habitat characteristics of photosynthetic organisms. Therefore, analysis of chlorophyll-derived materials from photosynthetic organisms in sedimentary rocks is important for understanding paleo-environmental changes. Fossilized chlorophylls present in sedimentary rocks can be detected by their conversion into maleimides and phthalimides. This can be achieved through the chromic acid oxidation of sedimentary rocks. Since the maleimides and phthalimides are derived from the pyrrole skeleton of fossil chlorophylls, their composition reflects the composition of paleo-photosynthetic organisms. We herein propose an indicator for detecting anoxic-sulfidic conditions in the paleo oceanic photic zone, which is based on the composition ratio of the maleimides produced during the oxidation process. The maleimide index in this study would be a useful analytical method to indicate that anoxic-sulfidic conditions in the paleo oceanic photic zone, which is associated with mass extinction events, have occurred.

摘要

过去光合生物的组成基于光合生物的栖息地特征提供了有关古环境的信息。因此，分析沉积岩中光合生物的叶绿素衍生物质对于理解古环境变化很重要。沉积岩中存在的化石叶绿素可通过转化为马来酰亚胺和邻苯二甲酰亚胺来检测。这可以通过沉积岩的铬酸氧化来实现。由于马来酰亚胺和邻苯二甲酰亚胺源自化石叶绿素的吡咯骨架，它们的组成反映了古光合生物的组成。我们在此提出一种基于氧化过程中产生的马来酰亚胺的组成比来检测古海洋光合带缺氧-硫化条件的指标。本研究中的马来酰亚胺指数将是一种有用的分析方法，可表明与大规模灭绝事件相关的古海洋光合带缺氧-硫化条件已经发生。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/3b68ce79b6c5/d2ra04702k-f8.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/e0691ad33f7c/d2ra04702k-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/9cf6ef0470ab/d2ra04702k-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/0f714d34a2da/d2ra04702k-f6.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/e1722832fcf7/d2ra04702k-f7.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/3b68ce79b6c5/d2ra04702k-f8.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/da554141fe89/d2ra04702k-c1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/fed41c9bfacf/d2ra04702k-f1.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/ce15f540b37c/d2ra04702k-f2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/7f1d5d2b1120/d2ra04702k-f3.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/9ba5ff737101/d2ra04702k-c2.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/e0691ad33f7c/d2ra04702k-f4.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/9cf6ef0470ab/d2ra04702k-f5.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/4daa/9620498/0f714d34a2da/d2ra04702k-f6.jpg
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