在尿素酶阳性Staphylococcus sp.中MICP动态的洞察力 在H6和Sporosarcina pasteurii细菌中
Laurynas Vaskevicius1, Vilius Malunavicius1, Marija Jankunec2
1Department of Microbiology and Biotechnology, Institute of Biosciences, Life Sciences Center, Vilnius University, Sauletekis Av. 7, LT-10257, Vilnius, Lithuania.
Environmental research
|July 9, 2023
概括
这项研究表明,Staphylococcus sp. H6可以进行微生物诱导的酸盐沉 (MICP) 进行土壤生物巩固,在细菌表面形成CaCO3晶体. 这种新方法提供了环保的土壤改善和混凝土修复的可能性.
科学领域:
- 环境微生物学 环境微生物学
- 生物地质化学生物地质化学
- 材料科学 材料科学 材料科学
背景情况:
- 微生物诱导的石沉 (MICP) 是一种可持续的土壤改善和混凝土修复技术.
- 虽然*Sporosarcina pasteurii*已被确立为MICP,但其他丰富的细菌,如*Staphylococcus*仍然没有研究生物结合.
- 微生物降解尿素以形成CaCO3晶体是常见MICP方法的关键.
研究的目的:
- 分析 *Sporosarcina pasteurii* 和一种新的 *Staphylococcus* sp. 的表面水平MICP过程. H6. H6. H6. H6. H6. H6. H6. H6. H6. H6. H6. H6. H6. H6. H6. H6. H6. H6. H6. H6.
- 为了证明 *Staphylococcus* sp. 的 MICP 能力. H6用于生物巩固应用.
- 用先进的显微镜研究细菌细胞表面CaCO3沉的动态.
主要方法:
- 培养和表征的 * 葡萄球菌* sp. H6是MICP. 的一个字.
- 对Ca2+离子沉的量化.
- 使用拉曼光谱和X射线衍射 (XRD) 分析CaCO3晶体形成.
- 通过水流试验评估生物凝固的有效性.
- 使用原子力显微镜 (AFM) 在细胞表面上动态观察MICP.
主要成果:
- * 葡萄球菌 * sp. H6 显示出显著的 Ca2+ 离子沉 (157.35 ± 3.3 mM),相当于 *S. pasteurii* (176 ± 4.8 mM).
- 拉曼光谱和XRD证实了在两种 *Staphylococcus* sp. 上的CaCO3晶体形成. 在H6和*S. pasteurii*细胞中.
- 生物凝固的沙子样本显示,这两种细菌菌株的水透性显著降低.
- 在暴露于生物凝固溶液后15-30分钟内,在细菌表面上观察到CaCO3沉.
- AFM显示了细胞粗度的快速变化,在90分钟后出现了完整的CaCO3涂层.
结论:
- * 葡萄球菌 * sp. H6是微生物诱导的石沉 (MICP) 的有效微生物.
- 这项研究提供了第一个证据,证明了使用AFM对*Staphylococcus*和*S. pasteurii*细胞表面的快速CaCO3沉动态.
- 这些发现突显了 *Staphylococcus* sp. 的潜力. H6用于环保的土壤生物巩固和混凝土恢复.
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