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- W2891529411 abstract "A key problem of how to distinguish between biotic and abiotic carbonate minerals in nature and/or in the laboratory has confused researchers for some time. Although numerous studies have been performed to explore the formation mechanism and the unique characteristics of biotic minerals, the issue needs to be studied further. Here, biotic calcite precipitation was induced by the microorganism Bacillus cereus MRR2 (GenBank KY810857), while organogenic and inorganogenic calcite was investigated in parallel. The results indicate that carbonic anhydrase (CA, a common enzyme of bacteria) promoted carbon dioxide hydration to release HCO3− and CO32− in the process of calcite precipitation; the pH increased from 7.2 to 8.9 as a result of the combination effect of the released ammonia by B. cereus MRR2 and the HCO3− and CO32− ions originating from the CA reaction. Glutamic acid is the most abundant amino acid in the extracellular polymeric substances of the bacteria, and its free carboxyl ions with a large number of negative charges in the alkaline environment facilitated the adsorption of calcium ions. The biotic calcite has a series of unique characteristics different from the organogenic and inorganogenic calcites, such as particular morphologies, P element composition and a variety of organic functional groups. Intracellular amorphous nanospheres without any crystal structure are also recorded. Stable carbon isotope analyses show that the biotic calcite (−20.9‰) has more negative δ13C values than the organogenic calcite (−15.6‰) and inorganogenic calcite (−11.7‰), indicating that microbial activity strongly affected the carbon isotope composition of biotic calcite. More importantly, the crystallinity and activation energy of the biotic calcite are clearly higher than those of organogenic calcite, suggesting that the thermal stability of biotic calcite is much higher. Thus, this study provides important insights into understanding the mechanisms of microbial biomineralization and the processes of biotic calcite formation, especially the roles microbes played in mineral nucleation and growth, as well as the unique characteristics of the resulting minerals. This study may provide useful evidence for further recognizing biotic and abiotic calcite in the geological record." @default.
- W2891529411 created "2018-09-27" @default.
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- W2891529411 date "2018-11-01" @default.
- W2891529411 modified "2023-10-14" @default.
- W2891529411 title "Calcite precipitation induced by Bacillus cereus MRR2 cultured at different Ca2+ concentrations: Further insights into biotic and abiotic calcite" @default.
- W2891529411 cites W1005466861 @default.
- W2891529411 cites W1147458264 @default.
- W2891529411 cites W1513087030 @default.
- W2891529411 cites W1537550890 @default.
- W2891529411 cites W1571723464 @default.
- W2891529411 cites W1574724856 @default.
- W2891529411 cites W1701214012 @default.
- W2891529411 cites W1863860213 @default.
- W2891529411 cites W1963657126 @default.
- W2891529411 cites W1964740351 @default.
- W2891529411 cites W1965115120 @default.
- W2891529411 cites W1965440213 @default.
- W2891529411 cites W1968835806 @default.
- W2891529411 cites W1976241532 @default.
- W2891529411 cites W1976907162 @default.
- W2891529411 cites W1977836001 @default.
- W2891529411 cites W1988175035 @default.
- W2891529411 cites W1989025984 @default.
- W2891529411 cites W1990998774 @default.
- W2891529411 cites W1995356206 @default.
- W2891529411 cites W1995590809 @default.
- W2891529411 cites W1995680689 @default.
- W2891529411 cites W2000317717 @default.
- W2891529411 cites W2000498458 @default.
- W2891529411 cites W2004697840 @default.
- W2891529411 cites W2011349620 @default.
- W2891529411 cites W2011469843 @default.
- W2891529411 cites W2011837148 @default.
- W2891529411 cites W2012257367 @default.
- W2891529411 cites W2013758122 @default.
- W2891529411 cites W2015161558 @default.
- W2891529411 cites W2016947144 @default.
- W2891529411 cites W2017300974 @default.
- W2891529411 cites W2017918382 @default.
- W2891529411 cites W2020874470 @default.
- W2891529411 cites W2022067509 @default.
- W2891529411 cites W2023238257 @default.
- W2891529411 cites W2024591665 @default.
- W2891529411 cites W2024946468 @default.
- W2891529411 cites W2024981338 @default.
- W2891529411 cites W2028106683 @default.
- W2891529411 cites W2029534411 @default.
- W2891529411 cites W2029805969 @default.
- W2891529411 cites W2031373246 @default.
- W2891529411 cites W2033250043 @default.
- W2891529411 cites W2033432841 @default.
- W2891529411 cites W2034062592 @default.
- W2891529411 cites W2035046825 @default.
- W2891529411 cites W2038639383 @default.
- W2891529411 cites W2042738175 @default.
- W2891529411 cites W2043064925 @default.
- W2891529411 cites W2043942537 @default.
- W2891529411 cites W2044573800 @default.
- W2891529411 cites W2048153717 @default.
- W2891529411 cites W2049995988 @default.
- W2891529411 cites W2054101480 @default.
- W2891529411 cites W2054273144 @default.
- W2891529411 cites W2055942035 @default.
- W2891529411 cites W2060708796 @default.
- W2891529411 cites W2061665958 @default.
- W2891529411 cites W2063111628 @default.
- W2891529411 cites W2063431185 @default.
- W2891529411 cites W2064266785 @default.
- W2891529411 cites W2064597882 @default.
- W2891529411 cites W2065046615 @default.
- W2891529411 cites W2066512895 @default.
- W2891529411 cites W2069424847 @default.
- W2891529411 cites W2070889869 @default.
- W2891529411 cites W2077873201 @default.
- W2891529411 cites W2080586353 @default.
- W2891529411 cites W2082445689 @default.
- W2891529411 cites W2082602103 @default.
- W2891529411 cites W2083787195 @default.
- W2891529411 cites W2085104316 @default.
- W2891529411 cites W2085221298 @default.
- W2891529411 cites W2085891680 @default.
- W2891529411 cites W2089131510 @default.
- W2891529411 cites W2090253629 @default.
- W2891529411 cites W2090507519 @default.